CN115733374A

CN115733374A - Power regulation circuit, method, device and related product

Info

Publication number: CN115733374A
Application number: CN202110990727.9A
Authority: CN
Inventors: 郭红光; 张晨松; 张锦; 李建国; 纪策; 田晨; 张加亮
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2023-03-03
Also published as: WO2023024998A1

Abstract

The application relates to a power adjusting circuit, a method, a device and a related product, wherein the power adjusting circuit comprises a transformer circuit and a conversion circuit, wherein the transformer circuit converts voltage provided by a power supply and takes the converted voltage as input voltage of the conversion circuit, the conversion circuit controls the output power of the conversion circuit to be preset output power when the input voltage is smaller than a preset value, and controls the output power of the conversion circuit to be first power higher than the preset output power when the input voltage is larger than the preset value.

Description

Power regulation circuit, method, device and related product

Technical Field

The present disclosure relates to the field of charging technologies, and in particular, to a power adjustment circuit, a method, an apparatus, and a related product.

Background

Power Factor (Power Factor, PF): refers to the ratio of the active power to the apparent power of an alternating current circuit. Under certain voltage and power, the higher the PF value is, the better the effect is, and the more the electric energy of the power generation equipment can be fully utilized.

In order to be able to pass the standard, a Power adapter with input Power greater than 75W is usually used as a front stage of an Alternating Current-Direct Current (ACDC) converter with a Power Factor Correction (PFC) circuit, so that the PF value of the Power adapter can pass the standard.

Disclosure of Invention

The embodiment of the application provides a power adjusting circuit, a method, a device and a related product.

In a first aspect, an embodiment of the present application provides a power adjustment circuit, including:

the transformer circuit is used for converting the voltage provided by the power supply and then providing input voltage for the conversion circuit;

the conversion circuit is used for controlling the output power of the power regulation circuit to be preset output power when the input voltage is smaller than a preset value; when the input voltage is larger than the preset value, the output power of the power adjusting circuit is controlled to be a first power higher than the preset output power.

In a second aspect, an embodiment of the present application provides a power adjustment circuit, including:

the conversion circuit is used for controlling the output power of the power adjusting circuit to be preset output power when the output voltage is larger than a preset value; and when the input voltage is smaller than the preset value, controlling the output power of the power adjusting circuit to be a second power lower than the preset output power.

In a third aspect, an embodiment of the present application provides an electric energy supply apparatus, including the power adjustment circuit as provided in the embodiments of the first aspect and the second aspect.

In a fourth aspect, an embodiment of the present application provides a terminal including the power adjustment circuit as provided in the embodiments of the first aspect and the second aspect.

In a fifth aspect, an embodiment of the present application provides a power adjustment method, where the method includes:

converting the voltage provided by the power supply and then providing an input voltage;

when the input voltage is smaller than a preset value, controlling the output power to be the preset output power; and when the input voltage is greater than the preset value, controlling the output power to be first power higher than the preset output power.

In a sixth aspect, an embodiment of the present application provides a power adjustment method, where the method includes:

when the input voltage is greater than a preset value, controlling the output power to be the preset output power; and when the input voltage is smaller than the preset value, controlling the output power to be second power lower than the preset output power.

In a seventh aspect, an embodiment of the present application provides a power adjustment apparatus, including:

the first conversion module is used for converting the voltage provided by the power supply and then providing an input voltage;

the first control module is used for controlling the output power to be the preset output power when the input voltage is smaller than the preset value; and when the input voltage is greater than the preset value, controlling the output power to be a first power higher than the preset output power.

In an eighth aspect, an embodiment of the present application provides a power adjustment apparatus, including:

the second conversion module is used for converting the voltage provided by the power supply and then providing input voltage;

the second control module is used for controlling the output power to be the preset output power when the input voltage is larger than the preset value; and when the input voltage is smaller than the preset value, controlling the output power to be a second power lower than the preset output power.

In a ninth aspect, an embodiment of the present application provides an electronic device, which includes a memory and a processor, where the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to execute the method steps in the embodiments of the fifth aspect and the sixth aspect.

In a tenth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the method steps in the fifth and sixth aspects described above.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1a is a schematic circuit diagram of a power adapter circuit in one embodiment;

fig. 1b is a schematic diagram of a PFC circuit topology in another embodiment;

FIG. 2 is a schematic diagram of a power regulation circuit in one embodiment;

FIG. 3 is a schematic diagram of output power variation in one embodiment;

FIG. 4 is a schematic diagram of a conversion circuit in one embodiment;

FIG. 5 is a schematic diagram illustrating output voltage variations in one embodiment;

FIG. 6 is a schematic diagram of a conversion circuit in another embodiment;

FIG. 7 is a schematic diagram of an input voltage waveform of the inverter circuit in one embodiment;

FIG. 8 is a schematic diagram of a power regulation circuit in another embodiment;

FIG. 9 is a schematic diagram of output current variation according to an embodiment;

FIG. 10 is a graph showing a variation in output current of the inverter circuit according to another embodiment;

FIG. 11 is a graph showing a variation in output current of the inverter circuit according to another embodiment;

FIG. 12 is a schematic diagram of a conversion circuit in another embodiment;

FIG. 13 is a schematic diagram of a conversion circuit in another embodiment;

FIG. 14 is a schematic diagram of a power regulation circuit in another embodiment;

FIG. 15 is a schematic diagram of a power regulation circuit in another embodiment;

FIG. 16 is a schematic diagram of a power regulation circuit in another embodiment;

FIG. 17 is a schematic diagram showing the variation of output power in another embodiment;

FIG. 18 is a schematic diagram of the variation of the output voltage in another embodiment;

FIG. 19 is a schematic diagram showing variations in output current according to another embodiment;

FIG. 20 is a graph showing a change in output current of the inverter circuit in another embodiment;

FIG. 21 is a graph showing a change in output current of the inverter circuit according to another embodiment;

FIG. 22 is a schematic diagram of a power regulation circuit in another embodiment;

FIG. 23 is a schematic diagram of a power regulation circuit in another embodiment;

FIG. 24 is a schematic diagram of a power regulation circuit in another embodiment;

FIG. 25 is a schematic view showing an internal structure of an electric power supply device in one embodiment;

fig. 26 is a schematic view of the internal structure of the electric power supply device in another embodiment;

fig. 27 is a schematic view of the internal structure of the terminal in one embodiment;

FIG. 28 is a flow chart illustrating a method for power adjustment according to one embodiment;

fig. 29 is a flow chart illustrating a power adjustment method according to another embodiment.

Description of reference numerals:

10: a power adjustment circuit; 101: a transformer circuit;

102: a conversion circuit; 103: a first charge-discharge module;

104: a rectifying circuit; 105: a second charge-discharge module;

106: a third charge-discharge module; 107: a fourth charge-discharge module;

1031: a first capacitor; 1051: a second capacitor;

1061: a third capacitor; 1071: a fourth capacitor;

1021: a conversion circuit; 1022: a control circuit;

10221: a voltage feedforward circuit; 10222: a current control circuit;

120: a rectification filtering module; 130: a switching circuit;

160: an output interface; 210: a rectification filter circuit;

220: a wireless transmission circuit; 310: a charging interface;

320: a battery; 330: and a control module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first client may be referred to as a second client, and similarly, a second client may be referred to as a first client, without departing from the scope of the present application. Both the first client and the second client are clients, but they are not the same client. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it should be understood that the directional terms such as "upper", "lower", etc., indicate directions or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the present application, the difference in name is not used as a means for distinguishing elements, but the difference in function of the elements is used as a principle of distinction.

The power consumption equipment usually adopts a high-efficiency switch power supply, and the switch power supply uses a large-capacity filter capacitor after rectification, so that the load characteristic of the power consumption equipment presents capacitance, and the direct current voltage at two ends of the filter capacitor has slight sawtooth wave ripple due to the charging and discharging action of the filter capacitor when the alternating current power supply supplies power to the power consumption equipment, so that although the input alternating current voltage is sinusoidal, the input alternating current generates serious distortion and contains a large amount of harmonic waves, and the existence of the harmonic waves not only reduces the power factor of an input circuit, but also pollutes a public power system and causes circuit faults. Based on this, in order to improve the Power Factor of the electric equipment and reduce harmonics, the Power Factor Correction (PFC) circuit is usually used for realizing, the larger the Power Factor is, the higher the effective utilization rate of the representative Power is, the higher the PFC circuit is combined into the Power grid, namely, the PFC circuit can be used for conditioning the Power grid so that the voltage and the current of the Power grid are in the same phase, and the higher harmonics are reduced at the same time, thereby improving the utilization rate of the Power grid.

For example, in the case of a switching power supply of a computer, a power adapter of the switching power supply of the computer is a capacitance input type circuit, and a phase difference between a current and a voltage, which is formed by a phase shift between a voltage and a current, causes a loss of ac power, and in this case, a PFC circuit is required to improve a power factor. As shown in fig. 1a, which is a schematic diagram of a PFC circuit in a power adapter circuit, in fig. 1a, a PFC circuit is connected between a bridge rectifier circuit S and a filter capacitor C, and the PFC circuit can perform power factor correction and voltage stabilization.

Specifically, taking PFC in Boost (Boost) as an example, the internal topology of the PFC circuit in this example may be combined with that shown in fig. 1b, where the inductor L, the MOS transistor Q, and the diode D form a Boost circuit in fig. 1 b. In this circuit, an AC power supply AC passes through a bridge rectifier circuit to obtain a dc voltage Vrect. When the MOS tube Q is conducted, the inductor L stores energy through an alternating current power supply AC; when the MOS tube Q is switched on and switched off, the inductor L and the alternating current power supply AC supply power for the load at the same time. Thus, in fig. 1b, the PFC circuit changes the capacitive load and the inductive load of the circuit into the resistive load, and controls the current of the inductor L through the MOS transistor Q, so that the current of the inductor L tracks the "steamed bread wave" voltage command after the bridge rectifier circuit S, and thus the input current is sinusoidal and in phase with the input voltage, thereby correcting the waveform distortion degree and phase of the input current, improving the power factor, and achieving the purpose that the power factor approaches 1.

However, the devices such as the switching tube and the diode in the Boost PFC circuit may cause extra loss to the whole circuit, and thus the efficiency of the whole circuit = the efficiency of the rectifier bridge and the efficiency of the PFC circuit and the efficiency of the DCDC. Since the PFC circuit requires a large capacity electrolytic capacitor and a large PFC inductor, the power adapter including the PFC circuit is generally difficult to be made small. Even if the size of the power adapter is reduced as much as possible under actual requirements, the additional loss caused by the PFC circuit generates heat, which makes the heat dissipation problem of the power adapter with smaller size more prominent.

In view of the above situation, the embodiments of the present application provide a power adjustment circuit, an electric energy providing device, and a related product, which implement a PFC function by dynamically adjusting output power, reduce the size of a power adapter, and reduce heat generation.

The following describes the procedure of the power adjustment circuit provided in the embodiment of the present application with a specific embodiment. It should be noted that, when the power adjustment circuit provided in the embodiment of the present application dynamically adjusts the output power, the dynamic adjustment circuit will be described by dividing into two processes, namely, a dynamic increase process and a dynamic decrease process. Wherein, the dynamic increase refers to that the output power of the power adjusting circuit is dynamically increased along with the increase of the input voltage of the power adjusting circuit; dynamic reduction refers to a dynamic reduction of the output power of the power regulating circuit as the input voltage of the power regulating circuit decreases.

The following description will first be made of a process in which the output power of the power adjustment circuit increases as the input voltage of the power adjustment circuit increases.

As shown in fig. 2, in an embodiment, the power adjusting circuit 10 includes: the transformer circuit 101 converts a voltage supplied from a power supply and supplies the converted voltage to the converter circuit 102.

A conversion circuit 102, configured to control the output power of the power adjustment circuit 10 to be a preset output power when the input voltage is smaller than a preset value; when the input voltage is greater than the preset value, the output power of the power adjusting circuit 10 is controlled to be a first power higher than the preset output power.

Fig. 2 illustrates a connection relationship of the transformer circuit 101 and the conversion circuit 102. A first end of the transformer circuit 101 is connected with a power source Vin, and a second end of the transformer circuit 101 is connected with a first end of the conversion circuit 102; the second end of the converting circuit 102 is an output end Pout, which is an output end of the whole power adjusting circuit 10, that is, the output power of the converting circuit 102 mentioned in the embodiment of the present application refers to the output power of the power adjusting circuit 10, that is, the output power of the power adjusting circuit 10 and the output power of the converting circuit 102 refer to the output end Pout of the converting circuit 102, and therefore, details will not be described later.

The Transformer circuit 101 implements conversion of a voltage provided by a power supply so that an output voltage can be converted in equal proportion to an input voltage, and may be, for example, a direct current Transformer (DCX) circuit. In practical applications, the transformer circuit 101 may be a unidirectional DCX or a bidirectional DCX, or may be a combined DCX circuit formed by parallel and series combination of DCXs, and the like, which is not limited in this embodiment of the application. Among these, DCX topologies include, but are not limited to: half-bridge LLC (resonant circuit), full-bridge LLC (resonant circuit), phase-shifted full-bridge, forward, push-pull etc. this application embodiment does not restrict yet.

The transformer circuit 101 transforms the voltage provided by the power Vin, and the output transformed voltage is used as the input voltage of the converter circuit 102, so that the converter circuit 102 can regulate and control the output power of the whole power adjusting circuit 10 according to the input voltage, and when the input voltage is in different ranges, the output power of the power adjusting circuit 10 changes accordingly, that is, the output power of the power adjusting circuit 10 changes along with the change of the power Vin.

Specifically, based on the voltage Vr output after the voltage Vin provided by the transformer circuit 101 is subjected to voltage conversion, the voltage Vr enters the conversion circuit 102, and when the input voltage Vr is smaller than a preset value, the conversion circuit 102 controls the output power of the power adjustment circuit 10 to be the preset output power Pout _ S; when the input voltage Vr is greater than the predetermined value, the converting circuit 102 controls the output power of the power adjusting circuit 10 to be the first power Pout _ m higher than the predetermined output power Pout _ S. For the situation that the input voltage Vr is equal to the preset value, which is a critical situation, the situation that the input voltage Vr is equal to the preset value can be divided into scenes that the input voltage Vr is smaller than the preset value, that is, when the input voltage Vr is equal to the preset value, the conversion circuit 102 controls the output power of the power adjustment circuit 10 to be the preset output power Pout _ S; of course, the input voltage Vr equal to the preset value may also be divided into a scenario where the input voltage Vr is greater than the preset value, that is, when the input voltage Vr is equal to the preset value, the conversion circuit 102 may control the output power of the power adjustment circuit 10 to be the first power Pout _ m higher than the preset output power Pout _ S.

It should be noted that, in the cases of size differentiation related in the subsequent embodiments, the equal critical condition may be divided into greater than scenes, and the equal critical condition is processed in a manner of processing the greater than scenes, or the equal critical condition is divided into less than scenes, and the equal critical condition is processed in a manner of processing the less than scenes, which is not described in detail in the embodiments of the present application.

The preset value is a value set according to an actual situation, for example, the preset value may be a preset fixed voltage, or a voltage value corresponding to a lowest point in the input voltage, or a voltage value determined according to a direct current component in the input voltage, and the like. The preset output power may also be a fixed power output by the conversion circuit 102 in a preset manner. The fixed power can be determined according to the voltage value of the input voltage, and also can be a power value set according to the actual requirement as the preset output power.

In one embodiment, the preset value is determined based on the output power of the power regulation circuit 10 and the output current of the transformer circuit 101.

That is, when the preset value is set, two factors, i.e., the output power of the power adjusting circuit 10 and the output current of the transformer circuit 101, need to be considered and set.

For example, in the process of controlling the output power of the power adjusting circuit 10, it is necessary to take the output current of the power adjusting circuit 10 into consideration, when the input voltage of the converting circuit 102 is greater than a preset value, the output current of the power adjusting circuit 10 is controlled to follow the input voltage, and when the input voltage of the converting circuit 102 is less than the preset value, the power adjusting circuit 10 is controlled to maintain constant current output.

At this time, when the power adjusting circuit 10 outputs a constant current, the output power is the minimum, and then the selected preset value must satisfy the condition that the power adjusting circuit 10 can reach the minimum output power in the process that the output current changes along with the change of the input voltage. For example, the preset value may be a voltage value corresponding to the minimum output power of the power adjusting circuit 10.

In addition, in practical applications, the current that can be borne by the transformer circuit 101 is also limited, and naturally, the output voltage of the transformer circuit 101 is also limited, and the output voltage of the transformer circuit 101 is the input voltage of the converter circuit 102. Based on this, the output voltage of the transformer circuit 101 needs to be considered when selecting the preset value, so as to ensure that the purpose that the output current of the power adjusting circuit 10 follows the input voltage is achieved, for example, the selected preset value may be any voltage value within the variation range of the output voltage of the transformer circuit 101. Considering the output voltage of the transformer circuit 101 in this way is equivalent to considering the output current of the transformer circuit 101.

Certainly, in some scenarios, when the preset value is set, it is not necessary to consider both the output power of the power adjusting circuit 10 and the output current of the transformer circuit 101, and only one of the two factors is selected as a consideration factor, as long as the set preset value meets the requirement, which is not limited in the embodiment of the present application.

In another embodiment, the determining of the preset value includes: detecting the input voltage of the conversion circuit according to a preset frequency; the preset frequency is smaller than a preset frequency threshold; and taking the minimum value of the input voltage detected in the period corresponding to the preset frequency as a preset value.

The preset frequency is a frequency for detecting the lowest point of the input voltage in a certain period, and is set as low as possible in order to ensure that the lowest point can be detected, for example, the preset frequency may be 1Hz, that is, the input voltage Vr of the conversion circuit is detected once every 1 s.

For example, every 1s, the input voltage Vr of the conversion circuit is detected, and when a corresponding minimum value Vr _ min of the input voltage is detected, in one mode, the Vr _ min can be always determined as a preset value; in another mode, the minimum value of the input voltage detected in each period corresponding to the preset frequency is taken as the preset value in the corresponding period, and the preset value in each period may be different, that is, the preset value may be changed along with the change of the input voltage. In this way, the input voltage of the inverter circuit is detected according to the preset frequency, and the lowest point of the input voltage of the inverter circuit can be detected more accurately because the preset frequency is smaller than the preset frequency threshold.

Equivalently, when the input voltage Vr is smaller than the preset value, the power finally output by the power adjustment circuit 10 is a fixed power Pout _ S, i.e., constant power output is maintained; when the input voltage Vr is greater than the preset value, the power finally output by the power adjustment circuit 10 is the first power Pout _ m, and the first power Pout _ m is greater than the fixed power Pout _ S.

Referring to fig. 3, when the current input voltage Vin is 15V, that is, the input voltage is equal to the preset value of 15V, the output power of the power adjustment circuit 10 is the preset power Pout _ S, which is a fixed value; however, if the current input voltage a is greater than 15V, the output power of the power adjustment circuit 10 is the first power Pout _ m, and the first power Pout _ m is greater than the preset power Pout _ S. It is to be understood that a is only a reference for a voltage greater than the input voltage 15V, and that the corresponding first power Pout _ m may also be different for different a. The embodiment of the application does not limit the specific numerical values of the preset value, the preset output power and the first power.

The power regulation circuit provided by the embodiment of the application comprises a transformer circuit and a conversion circuit, wherein the transformer circuit converts the voltage provided by a power supply and then provides input voltage for the conversion circuit, the conversion circuit controls the output power of the power regulation circuit to be preset output power when the input voltage is smaller than a preset value, and the output power of the power regulation circuit is controlled to be first power higher than the preset output power when the input voltage is larger than the preset value. Therefore, when the input voltage is smaller than the preset value, the power adjusting circuit keeps the output power constant by the preset output power, and when the input voltage is larger than the preset value, the output power of the power adjusting circuit is controlled to be the first power higher than the preset output power, so that the output power can be dynamically adjusted along with the input voltage, and the maximum voltage efficiency utilization can be guaranteed no matter how the input voltage changes. Considering from the efficiency dimension of the whole circuit, the output power is dynamically followed with the input voltage, which means that the ratio of the effective power to the apparent power of the whole circuit is larger, namely, the power factor is improved, and the PFC function is realized. Therefore, the power adjustment circuit provided by the embodiment of the application can realize the PFC function on the premise of not adding a special PFC circuit, so that the size of the power adapter is reduced, and the heat of the power adapter is not generated.

In some scenarios, in order to conveniently and rapidly adjust the output power, in the above embodiment, when the conversion circuit 102 dynamically adjusts the output power according to the input voltage Vr, the output power can be adjusted by adjusting the output voltage and adjusting the output current, which are described below.

As shown in fig. 4, in one embodiment, a process of dynamically adjusting the output power Pout according to the input voltage Vr by adjusting the output voltage is first described; in this embodiment, based on the above embodiment, the conversion circuit 102 includes: a conversion circuit 1021 for performing voltage conversion on the input voltage and outputting the converted voltage; a control circuit 1022, configured to control the output voltage of the transformation circuit 1021 to be a preset output voltage when the input voltage is smaller than a preset value, so that the output power of the power adjustment circuit 10 is a preset output power; when the input voltage is greater than the preset value, the output voltage of the transformation circuit 1021 is controlled to be a first voltage higher than the preset output voltage, so that the output power of the power adjustment circuit 10 is a first power higher than the preset output power.

Fig. 4 illustrates a connection relationship between the conversion circuit 1021 and the control circuit 1022. A first terminal of the control circuit 1022 is connected to the input voltage Vr, and a first terminal of the conversion circuit 1021 is also connected to the input voltage Vr; a second terminal of the control circuit 1022 is connected to a second terminal of the transform circuit 1021; the output terminal Vout of the converting circuit 1021 outputs the preset output voltage, or the first voltage output by the output terminal Vout of the converting circuit 1021.

In this embodiment, the conversion circuit 1021 can implement voltage conversion, for example, can implement voltage boosting, voltage dropping, or voltage boosting, and can be applied to boost, buck-boost, and other types of circuits.

Taking the conversion circuit 1021 as an example of a DC/DC converter, the DC/DC converter is a DC power supply that converts a DC power supply of a certain voltage level into a DC power supply of another voltage level, and for example, may convert an input DC power into an ac power by a self-oscillation circuit, change a voltage by a transformer, and then convert the ac power into a DC power for output, or convert the ac power into a high-voltage DC power for output by a voltage doubling rectifier circuit. The internal circuit structure and the specific conversion process of the DC/DC converter are not limited in the embodiments of the present application, and only the input voltage is subjected to voltage level conversion to obtain the output voltage.

In practical applications, the input voltage of the DCDC converter may become larger or smaller in some scenarios. For the case that the input voltage of the DCDC converter is increased, if the input voltage of the DCDC converter is higher than the preset value, the output voltage of the DCDC converter can be compensated, so that the output voltage of the DCDC converter is increased as the input voltage is increased.

Specifically, after the conversion circuit 1021 performs voltage conversion on the input voltage Vr to obtain the output voltage Vout, and when the input voltage Vr is smaller than the preset value, the control circuit 1022 controls the output voltage Vout to be the preset output voltage Vout _ S, so that the output power Pout of the power adjustment circuit 10 is the preset output power Pout _ S; when the input voltage Vr is greater than the preset value, the output voltage Vout is controlled to be a first voltage Vout _ m higher than the preset output voltage Vout _ S, so that the output power of the power adjustment circuit 10 is a first power Pout _ m higher than the preset output power Pout _ S. It can be understood that, in this embodiment, after the preset output voltage Vout _ S is determined, the corresponding value of the preset output power is the power calculated by the preset output voltage Vout _ S and the output current; similarly, after the first voltage Vout _ m is determined, the corresponding first power Pout _ m is also the power calculated based on the first voltage Vout _ m and the output current. For the case that the input voltage Vr is equal to the preset value, the input voltage Vr may be attributed to a scenario that the input voltage Vr is greater than the preset value, or attributed to a scenario that the input voltage Vr is less than the preset value, which may be referred to in the description of the foregoing embodiments, and the present embodiment does not limit this.

The preset output voltage may be a fixed voltage value preset for the output of the transformation circuit 1021. The fixed voltage value can be determined according to the voltage value of the input voltage, and can also be set as a preset output voltage according to the actual requirement. For example, the input voltage is 9V, and the preset output voltage is set to a fixed voltage of 5V.

Optionally, the preset output voltage is a product of the input voltage and a coefficient. The coefficient may be a predetermined scale factor, for example, if the scale factor is 0.5, then the predetermined output voltage is 4.5V if the input voltage is 9V.

As shown in fig. 5, for example, when the preset value is 9V and the current input voltage Vr is 9V, that is, the input voltage is less than the preset value of 9V, the output voltage of the converting circuit 1021 is the preset output voltage 5V, which is a fixed value; however, if the current input voltage is a, a is greater than 9V, that is, the input voltage is greater than the preset value of 9V, the output voltage of the conversion circuit 1021 is the first voltage B, and the first voltage B is greater than the preset output voltage of 5V. It will be appreciated that a is merely a reference to being greater than the input voltage 9V, and that the corresponding first voltage may be different for different a's. The embodiment of the application does not limit the preset value, the preset output voltage and the specific value of the first voltage.

The conversion circuit in the embodiment comprises a conversion circuit and a control circuit, wherein the conversion circuit performs voltage conversion on input voltage and outputs the converted input voltage, and the control circuit controls the output voltage of the conversion circuit to be preset output voltage when the input voltage is smaller than a preset value, so that the output power of the power adjusting circuit is preset output power; when the input voltage is greater than the preset value, the output voltage of the conversion circuit is controlled to be a first voltage higher than the preset output voltage, so that the output power of the power adjusting circuit is a first power higher than the preset output power. Therefore, when the input voltage is smaller than the preset value, the stable voltage output is kept by the preset output voltage, and the output of the circuit is ensured to be the preset output power; when the input voltage is greater than the preset value, the output voltage is controlled to be the first voltage higher than the preset output voltage, and the output power is guaranteed to correspond to the first power greater than the preset output power, so that the output power is dynamically adjusted according to the input voltage by adjusting the output voltage.

On the basis of the above-described embodiment, a different embodiment is provided below for the manner of determining the first voltage.

In one embodiment, the first voltage is a sum of a predetermined output voltage and a compensation voltage, wherein the compensation voltage is related to the input voltage.

With reference to fig. 4, when the input voltage Vr is greater than the predetermined value, the output voltage of the transforming circuit 1021 is a first voltage, which may be a sum of the predetermined output voltage and a compensation voltage. By adding a compensation voltage to the preset output voltage as a first voltage, the first voltage is the voltage value finally output by the conversion circuit 1021 after the input voltage is increased, so that the compensation voltage is added to the preset output voltage as the voltage value finally output by the conversion circuit 1021 when the input voltage Vr is increased, the final output voltage of the conversion circuit 1021 is increased along with the increase of the input voltage Vr, and the output power Pout of the power adjusting circuit is the first power higher than the preset output power.

Based on the above embodiments, in an embodiment of the present application, the above process is described by taking an example that the input voltage Vr in the conversion circuit 1021 includes the direct current component Vr _ dc and the alternating current component Vr _ ac.

Specifically, with respect to the input voltage Vr, the lowest point of the input voltage Vr is detected at a preset lower frequency, for example, the detected frequency is 1Hz, that is, every 1s, the value of the Vr lowest point is updated as Vr _ dc, that is, vr _ dc is the above-mentioned preset value, and a portion Vr _ ac larger than Vr _ dc is regarded as an alternating current component Vr _ ac of Vr, vr _ ac = Vr-Vr _ dc.

When the input voltage Vr is higher than Vr _ dc, vr _ dc is subtracted from Vr _ dc to obtain Vr _ ac, and Vr _ ac is subjected to a reduction operation to obtain a compensation voltage Vout _ ac, for example, vr _ ac is proportionally reduced to Vout _ ac, and the compensation voltage Vout _ ac is added to a preset output voltage Vout _ dc of the conversion circuit 1021, so that the final output voltage Vout of the conversion circuit 1021 = Vout _ dc + Vout _ ac.

When the input voltage Vr has only the dc component Vr _ dc, the ac component Vr _ ac of Vr is absent, and naturally, vout _ ac obtained by scaling down Vr _ ac is absent, so that the final output voltage Vout of conversion circuit 1021 is equal to Vout _ dc.

However, when the input voltage has the alternating current component Vr _ ac, the alternating current component Vr _ ac of Vr exists, and naturally, vout _ ac obtained by scaling down Vr _ ac also exists, and the final output voltage Vout = Vout _ dc + Vout _ ac of transform circuit 1021, that is, in addition to the preset output voltage Vout _ dc, the alternating current component Vout _ ac also exists in the final output voltage Vout of transform circuit 1021, so that the output voltage of transform circuit 1021 is a first voltage (Vout _ ac + Vout _ dc) higher than the preset output voltage Vout _ dc.

In one embodiment, the compensation voltage may be a predetermined fixed voltage value. For example, for a range greater than the input voltage Vr, a compensation voltage is set to a fixed value for one level, and specifically, if greater than 0.5V is set to a level and a preset value is 9V, the compensation voltage is set to a fixed voltage value X1 if the input voltage is between 9.5V and 9V, the compensation voltage is set to a fixed voltage value X2 if the input voltage is between 10V and 9.5V, and the like, and the corresponding fixed compensation voltages are sequentially set for the input voltages of different levels.

In another embodiment, a mapping table may be preset in combination with big data, where different compensation voltage values corresponding to different input voltage values are stored in the mapping table, for example, 9.1V corresponds to a compensation voltage X1,9.2V corresponds to a compensation voltage X2, and so on. When the voltage-level-adjustable voltage-level controller is applied, the compensation voltage value corresponding to the current input voltage is directly inquired from the mapping table, and then the sum of the inquired compensation voltage value and the preset output voltage is determined as the first voltage.

In another embodiment, the compensation voltage is obtained by reducing a difference between the input voltage and a predetermined value.

The difference between the input voltage Vr and the preset value represents the increase of the current input voltage Vr, and based on the increase, the increase can be reduced through some operations to obtain a voltage value, and the voltage value can be used as a compensation voltage. For example, the difference between the input voltage Vr and the preset value may be transformed by a preset algorithm model, that is, the difference between the input voltage Vr and the preset value is input into the preset algorithm model, and is reduced by the algorithm model, and the reduced output voltage value is determined as the compensation voltage; or, a difference between the input voltage Vr and a preset value can be reduced by using a device such as an operational amplifier to obtain a compensation voltage value; or, according to a preset scale factor, carrying out reduction operation on the difference value between the input voltage Vr and a preset value to obtain a compensation voltage value; or, in some embodiments, a variation may also be preset, and the difference between the input voltage Vr and the preset value is further subtracted by the variation to obtain the compensation voltage value.

And obtaining a compensation voltage value by carrying out reduction operation on the difference between the input voltage Vr and a preset value. In this way, the reduction operation is carried out by taking the difference value between the input voltage Vr and the preset value as the reference, and the reduction operation can be carried out according to the actual requirement, so that the output voltage of the conversion circuit is more accurately compensated, and the conversion circuit can accurately output the corresponding first voltage; moreover, the output voltage is accurately compensated, so that the over-compensation condition can be avoided, and the effect of protecting the conversion circuit is achieved.

In an embodiment, the compensation voltage may also be implemented by a circuit structure, the control circuit 1022 samples the input voltage Vr to obtain a sampling voltage, and operates on the sampling voltage to obtain the compensation voltage. Alternatively, the control circuit 1022 may compare the sampled voltage with a preset value, and when the sampled voltage is greater than the preset value, operate the sampled voltage to obtain the compensation voltage.

Any one of the above determining manners of the first voltage and the determining manner of the compensation voltage required for determining the first voltage are examples, and in practical application, the determining manner of the first voltage and the determining manner of the compensation voltage required for determining the first voltage may be adjusted according to practical requirements.

In the above description of the process of increasing the output power of the power adjusting circuit with the increase of the input voltage of the power adjusting circuit, the converter circuit and the control circuit are connected in the embodiments of the converter circuit, but it should be noted that in one embodiment, the converter circuit and the control circuit may be integrated. When the actual product is realized, the control circuit integrated design can be realized in the conversion circuit, so that the control circuit integrated design is realized in the conversion circuit, more wiring space and extra occupied space of devices are saved, and the final conversion circuit product can be greatly reduced in size.

As shown in fig. 6, in one embodiment, a process of implementing dynamic adjustment of the output power Pout according to the input voltage Vr by adjusting the output current is explained; in this embodiment, based on the above embodiment, the conversion circuit 102 includes: a conversion circuit 1021 for converting the input current and/or the input voltage and outputting the converted current and/or voltage; a control circuit 1022, configured to control the output current of the transforming circuit 1021 to be a preset output current when the input voltage is smaller than the preset value, so that the output power of the power adjusting circuit 10 is the preset output power; when the input voltage is greater than the preset value, the output current of the transformation circuit 1021 is controlled to be a first current higher than the preset output current, so that the output power of the power adjustment circuit 10 is a first power higher than the preset output power.

Fig. 6 illustrates a connection relationship between the conversion circuit 1021 and the control circuit 1022. A first terminal of the control circuit 1022 is connected to the input voltage Vr, and a first terminal of the conversion circuit 1021 is also connected to the input voltage Vr; a second terminal of the control circuit 1022 is connected to a second terminal of the transform circuit 1021; the output terminal Iout of the transform circuit 1021 outputs the preset output current, or the first current output by the output terminal Iout of the transform circuit 1021.

In this embodiment, the transformation circuit 1021 can realize transformation of any one of current, voltage, current and voltage, for example, can realize increasing current or decreasing current, and increasing voltage or decreasing voltage, etc., and can be applied to boost, buck-boost, etc. type circuits.

Taking the conversion circuit 1021 as an example of a DC/DC converter, the DC/DC converter means a DC power supply converting a DC power supply of a certain current class into a DC power supply of another current class, and for example, the DC power supply may be a DC power supply converting an input DC power into an ac power by a self-oscillation circuit, and then converting the ac power into a DC power for output after changing a voltage by a transformer, or a DC power supply converting an ac power into a high-voltage DC power for output by a voltage doubling rectifier circuit. The internal circuit structure and the specific conversion process of the DC/DC converter are not limited in the embodiments of the present application, and only the input current is subjected to the current level conversion to obtain the output current.

In practical applications, the input voltage of the DC/DC converter may become larger or smaller in some scenarios. When the input voltage of the DC/DC converter is higher than a preset value, the output current of the DC/DC converter may be adjusted so that the output current of the DC/DC converter increases as the input voltage increases.

In the scenario where the conversion circuit is a DCDC converter, the control circuit and the DCDC converter may be integrated, and optionally, the control circuit 20 may be integrated inside the DCDC converter. Therefore, when an actual product is realized, the integrated design of the control circuit is realized in the DCDC converter, more wiring space and extra occupied space of devices can be saved, and the volume of the final conversion circuit product can be greatly reduced.

It should be noted that the DC/DC converter has the lowest operating voltage, and when the input voltage is less than the lowest operating voltage of the DC/DC converter, the DC/DC converter stops operating, that is, when the input voltage is less than the lowest operating voltage of the DC/DC converter, the output current of the DC/DC converter is 0. Therefore, in the embodiment of the present application, the preset value is greater than the lowest operating voltage of the DC/DC converter, that is, when the input voltage of the DC/DC converter is less than the preset value and greater than the lowest operating voltage of the DC/DC converter, the control circuit 1022 controls the converting circuit 1021 to keep stable current output.

Illustratively, assume that the input voltage ripple of the transformation circuit 1021 is set as a function: vin _ ac = vinc | sin (2 pi f t) |, and the resulting input voltage waveform of the converter circuit is shown in fig. 7, where vinc is the amplitude of the input voltage ripple of the converter circuit, f is the frequency of the input voltage ripple, and Vin _ ac is the input voltage ripple of the converter circuit. It should be noted that the input voltage ripple of the actual conversion circuit is not necessarily the ripple shown in fig. 7, and fig. 7 is merely an example.

Exemplarily, the DC/DC key variables referred to in this application: the relationship between the input voltage Vr, the input current Iin and the output current Iout can be shown in fig. 8. In this embodiment, the conversion circuit 1021 performs current conversion on the input current Iin to obtain an output current Iout, and the control circuit 1022 controls the output current Iout to be a preset output current Iout _ S when the input voltage Vr is smaller than the preset value, so that the output power Pout of the power adjustment circuit is a preset output power Pout _ S; and when the input voltage Vr is larger than the preset value, controlling the output current Iout to be a first current Iout _ m higher than the preset output current Iout _ S so as to enable the output power of the power adjusting circuit to be a first power Pout _ m higher than the preset output power Pout _ S. For the case that the input voltage Vr is equal to the preset value, the input voltage Vr may be attributed to a scenario that the input voltage Vr is greater than the preset value, or attributed to a scenario that the input voltage Vr is less than the preset value, which may be referred to in the description of the foregoing embodiments, and the present embodiment does not limit this.

It can be understood that, in this embodiment, after the preset output current Iout _ S is determined, the corresponding value of the preset output power is the power calculated by the preset output current Iout _ S and the output voltage; similarly, after the first current Iout _ m is determined, the corresponding first power Pout _ m is also the power calculated based on the first current Iout _ m and the output voltage.

The preset output current may be a fixed current value preset for the output of the conversion circuit 1021. The fixed current value can be determined according to the input current, and can also be a current value set according to actual requirements as a preset output current.

As shown in fig. 9, for example, when the preset value is 9V and the current input voltage Vin is 9V, that is, the input voltage is less than the preset value of 9V, the output current of the converting circuit 1021 is the preset output current 10A, which is a fixed value; however, if the current input voltage is a, a is greater than 9V, i.e., the input voltage is greater than the preset value of 9V, the output current of the transforming circuit 1021 is the first current B, and the first current B is greater than the preset output current 10A. It is understood that a is merely a designation for a voltage greater than the input voltage 9V, and that the corresponding first current may be different for different a's. The embodiment of the application does not limit the preset value, the preset output current and the specific numerical value of the first current.

The following description takes an example in which the preset value is 15V and the conversion circuit is connected with two different loads:

first, when the conversion circuit 1021 is connected to a Constant Voltage (CV) load, the output current Iout changes with the input voltage Vr when the input voltage Vr of the conversion circuit 1021 is greater than 15V, and the output current Iout maintains a constant current output when the input voltage Vr of the conversion circuit 1021 is less than 15V, and in this scenario, a change curve of the output current Iout of the conversion circuit 1021 is as shown in fig. 10.

Second, when the conversion circuit is connected to a Constant Resistance (CR) load, the output current Iout changes with the input voltage Vr when the input voltage Vr of the conversion circuit 1021 is larger than 15V, and when the input voltage Vr of the conversion circuit 1021 is smaller than 15V, the output current Iout maintains a constant current output, and in this case, a change curve of the output current Iout of the conversion circuit 1021 is as shown in fig. 11.

When the input voltage Vr of the conversion circuit 1021 is equal to 15V, the input voltage Vr may be classified into a case where the input voltage Vr of the conversion circuit 1021 is greater than 15V, or a case where the input voltage Vr of the conversion circuit 1021 is less than 15V. The embodiments of the present application do not limit this.

In this embodiment, the conversion circuit includes a conversion circuit and a control circuit, where the conversion circuit converts and outputs the input current and/or the input voltage, and the control circuit controls the output current of the conversion circuit to be a preset output current when the input voltage of the conversion circuit is smaller than a preset value, so as to make the output power of the power adjustment circuit be the preset output power; when the input voltage is greater than the preset value, controlling the output current of the conversion circuit to be a first current higher than the preset output current, so that the output power of the power adjusting circuit is a first power higher than the preset output power; therefore, when the input voltage is smaller than the preset value, the current output is kept stable by the preset output current, and the circuit output is ensured to be the preset output power; when the input voltage is larger than the preset value, the output current is controlled to be the first current higher than the preset output current, and the output power is ensured to correspond to the first power larger than the preset output power, so that the output power is dynamically adjusted according to the input voltage by adjusting the output current.

In a scenario where the input voltage Vr of the conversion circuit 1021 is greater than the preset value, the control circuit 1022 controls the output current of the conversion circuit to be the first current higher than the preset output current, in addition to the above embodiment, in an embodiment, the first current is obtained by increasing the pulse duty ratio of the output current of the conversion circuit 1021.

In this embodiment, when the input voltage Vr of the conversion circuit 1021 is greater than the preset value, the control circuit 1022 needs to control the output current of the conversion circuit to be the first current, and the first current is higher than the preset output current, and the current can be controlled by controlling the pulse duty of the current, so that to make the output current of the conversion circuit 1021 be the first current, the pulse duty of the output current of the conversion circuit 1021 needs to be increased so that the output current of the conversion circuit 1021 is higher than the preset output current.

In this embodiment, the first current output by the conversion circuit is obtained by increasing the pulse duty ratio of the output current of the current conversion circuit, so that the first current can be flexibly adjusted by adjusting the pulse duty ratio of the output current of the conversion circuit, and the output current of the conversion circuit can meet a wider application scenario.

In another embodiment, the first current is obtained by adjusting the frequency of the control signal of the transforming circuit 1021, or the first current is obtained by adjusting the frequency of the control signal corresponding to the preset output current.

In this embodiment, when the input voltage Vr of the converting circuit 1021 is greater than the predetermined value, the control circuit 20 needs to control the output current of the converting circuit to be the first current, and the first current is a current higher than the predetermined output current, so that the output current of the converting circuit 10 can be the first current higher than the predetermined output current by adjusting the frequency of the control signal of the converting circuit 1021. Alternatively, the output current of the converting circuit 1021 may be a first current higher than the preset output current by adjusting the frequency of the control signal corresponding to the preset output current.

In this embodiment, the first current output by the conversion circuit is obtained by adjusting the frequency of the control signal of the conversion circuit, or is obtained by adjusting the frequency of the control signal corresponding to the preset output current, so that the first current can be adjusted by adjusting the frequency of the control signal of the conversion circuit or adjusting the frequency of the control signal corresponding to the preset output current, and the diversity of the manner of adjusting the first current is further increased, so that the output current of the conversion circuit can meet a wider application scenario.

In a scenario where the output current of the conversion circuit is controlled to be a first current higher than the preset output current by the control circuit 1022 when the input voltage Vr of the conversion circuit 1021 is greater than the preset value, and the first current is obtained by increasing the pulse duty ratio of the output current of the conversion circuit, on the basis of the above embodiment, in an embodiment, the control circuit 1022 is configured to generate a second voltage according to the input voltage Vr of the conversion circuit 1021 and the preset value, and calculate the second voltage and the preset control voltage to obtain a third voltage; the preset control voltage is used for controlling the output current of the conversion circuit to be preset output current; and a conversion circuit 1021 for increasing a pulse duty ratio of a control signal of the conversion circuit 1021 according to the third voltage to output the first current.

The controlled object in this application is the output current Iout of the conversion circuit 1021, the controlled input amount is the input voltage Vr of the conversion circuit 1021, and the correspondence between the two can be realized through corresponding hardware circuits, that is, the output current Iout of the conversion circuit 1021 can be regulated and controlled through the voltage value generated by the control circuit 1022. Optionally, in this embodiment, the control circuit 1022 may perform an operation on the input voltage of the conversion circuit 1021 and the preset value, increase the signal obtained by the operation to obtain a second voltage, and perform an operation on the generated second voltage and the preset control voltage to obtain a second voltage; the preset control voltage is used for controlling the output current of the transformation circuit 1021 to be the preset output current. For example, the difference between the input voltage of the transform circuit 1021 and the preset value may be obtained, the difference may be amplified according to a preset scale factor to obtain a second voltage, and the second voltage and the preset control voltage may be further subjected to a difference operation to obtain the second voltage.

Optionally, in this embodiment, the control circuit 1022 includes a differential amplifier, the differential amplifier performs a differential operation on the input voltage Vr of the conversion circuit 1021 and a preset value, the differential amplifier increases the obtained differential signal to obtain a second voltage, then, the differential amplifier performs a differential operation on the obtained second voltage and the control voltage to obtain a second voltage, the second voltage is fed back to the COMP pin of the conversion circuit, and the conversion circuit increases the duty ratio of the control signal of the conversion circuit according to the second voltage on the COMP pin, so as to output the first current.

In this embodiment, the control circuit can generate the second voltage according to the input voltage and the preset value of the conversion circuit, so that the second voltage and the preset control voltage for controlling the output current of the conversion circuit to be the preset output current can be calculated to obtain the second voltage, and then the conversion circuit can increase the pulse duty ratio of the control signal of the conversion circuit according to the second voltage to output the first current higher than the preset output current, that is, the conversion circuit can flexibly adjust the output current of the conversion circuit according to the output current value of the control circuit, so that the output current of the conversion circuit can change along with the change of the input voltage, and thus the output current of the conversion circuit can meet a wider application scenario.

In a scenario where the control circuit 1022 generates a second voltage according to the input voltage and a preset value, and calculates the second voltage and the preset control voltage to obtain the second voltage. Based on the foregoing embodiments, in one embodiment, as shown in fig. 12, the control circuit 1022 includes a voltage feedforward circuit 10221 and a current control circuit 10222; the voltage feed-forward circuit 10221 is configured to cut off the output voltage to the current control circuit 10222 when the input voltage of the transforming circuit 1021 is smaller than the preset value; when the input voltage is greater than the predetermined value, the second voltage is output to the current control circuit 10222 according to the input voltage and the predetermined value; a current control circuit 10222, configured to control an output current of the transform circuit 1021 to be a preset output current according to the preset output current when an input voltage of the transform circuit 1021 is smaller than the preset value; when the input voltage of the conversion circuit 1021 is larger than the preset value, the conversion circuit 1021 is controlled to output the first current according to the preset output current and the second voltage.

In this embodiment, when the input voltage of the conversion circuit 1021 is smaller than the preset value, the control circuit 1022 needs to control the output current of the conversion circuit 1021 to be the preset output current for constant current output, and at this time, the output current of the conversion circuit 1021 does not need to be adjusted, so that the voltage feed-forward circuit 10221 in the control circuit 1022 stops outputting voltage to the current control circuit 10222, the conversion circuit 1021 outputs voltage at the constant current of the preset output current, for example, when the input voltage of the conversion circuit 1021 is 2V, and when the preset value is 5V, the input voltage of the conversion circuit 1021 is smaller than the preset value, at this time, the voltage feed-forward circuit 10221 stops outputting voltage to the current control circuit 10222, and the conversion circuit 1021 outputs voltage at the constant current of the preset output current.

When the input voltage of the transform circuit 1021 is greater than the preset value, the control circuit 1022 needs to control the output current of the transform circuit 1021 to be a first current higher than the preset output current, in this embodiment, the voltage feed-forward circuit 10221 in the control circuit 1022 may generate the second voltage according to the input voltage of the transform circuit 1021 and the preset value, so that the current control circuit 10222 in the control circuit 1022 may control the transform circuit 1021 to output the first current according to the second voltage and the preset control voltage. For example, when the input voltage of the transformation circuit 1021 is 9V and the default value is 5V, when the input voltage of the transformation circuit 1021 is larger than the default value, the voltage feed-forward circuit 10221 outputs a second voltage to the current control circuit 10222 according to the input voltage of the transformation circuit 1021 and the default value, and the current control circuit 10222 controls the transformation circuit 1021 to output the first current according to the default control voltage and the second voltage.

Optionally, in this embodiment, the voltage feedforward circuit 10221 may perform a difference operation on the input voltage and a preset value, and increase the obtained difference signal to obtain the second voltage, for example, a preset scale factor may be used to increase the difference information. Or, in some scenarios, the second voltage may be obtained by scaling down the obtained differential signal by a scaling factor, which is not limited in the embodiment of the present application. Alternatively, the current control circuit 10222 may perform a difference operation between the second voltage obtained by the voltage feed-forward circuit 10221 and the preset control voltage to obtain a third voltage, so that the conversion circuit 1021 increases a pulse duty ratio of a control signal of the conversion circuit 1021 according to the third voltage to output the first current.

In this embodiment, the voltage feed-forward circuit 10221 can stop outputting voltage to the current control circuit 10222 when the input voltage of the conversion circuit 1021 is smaller than a preset value, and the current control circuit 10222 can control the output current of the conversion circuit 1021 to be a preset output current according to a preset control voltage; when the input voltage of the conversion circuit 1021 is greater than the preset value, the voltage feedforward circuit 10221 can output a second voltage to the current control circuit according to the input voltage of the conversion circuit 1021 and the preset value, so that the current control circuit can control the conversion circuit 1021 to output a first current according to the preset control voltage and the second voltage, thus when the input voltage of the conversion circuit 1021 is less than the preset value, the current output is kept stable by the preset output current, when the input voltage of the conversion circuit 1021 is greater than the preset value, the output current of the conversion circuit 1021 is controlled to be the first current higher than the preset output current, that is, the final output current of the conversion circuit 1021 is increased on the basis of the original stable output current, thereby realizing that along with the increase of the input voltage of the conversion circuit 1021, the output current of the conversion circuit 1021 is increased, and the output current of the conversion circuit 1021 is changed correspondingly along with the change of the input voltage.

Based on the above embodiments, in one embodiment, please continue to refer to fig. 12, the voltage feed-forward circuit 10221 includes a sampling circuit C1 and a switch circuit K1; a sampling circuit C1 for comparing the input voltage of the conversion circuit 1021 with the preset value, and controlling a switch circuit K1 to open a path between the sampling circuit and the current control circuit 10222 when the input voltage of the conversion circuit 1021 is smaller than the preset value; when the input voltage of the transforming circuit 1021 is larger than the preset value, the switch circuit K1 is controlled to turn on the path between the sampling circuit C1 and the current control circuit 10222, and output the second voltage to the current control circuit 10222.

Illustratively, in this embodiment, taking the input voltage of the converting circuit 1021 as 7V and the preset value as 5V as an example, the sampling circuit C1 included in the voltage feed-forward circuit 10221 compares the input voltage of the converting circuit 1021 with the preset value, so as to obtain that the input voltage of the converting circuit is greater than the preset value, and then the sampling circuit C1 controls the switch circuit K1 to open a path between the sampling circuit C1 and the current control circuit 10222, and outputs a second voltage to the current control circuit 10222, so that the current control circuit 10222 controls the output current of the converting circuit 1021 to be a first current higher than the preset output current according to the second voltage and the preset control voltage. For another example, when the input voltage of the conversion circuit 1021 is 4V and the preset value is 5V, the sampling circuit C1 compares the input voltage of the conversion circuit 1021 with the preset value, and the obtained input voltage of the conversion circuit 1021 is smaller than the preset value, the sampling circuit C1 controls the switch circuit K1 to open the path between the sampling circuit C1 and the current control circuit 10222, so that the current control circuit 10222 controls the constant current output of the conversion circuit according to the preset control voltage.

Optionally, as shown in fig. 13, in this embodiment, the sampling circuit C1 includes an operational amplifier, a non-inverting input terminal of the operational amplifier is connected to the input terminal of the transformation circuit 1021, an inverting input terminal of the operational amplifier is used for inputting the preset value, and an output terminal of the operational amplifier is connected to the switch circuit K1, and optionally, the sampling circuit C1 may compare the input voltage of the transformation circuit 1021 with the preset value through the operational amplifier.

Optionally, referring to fig. 13, in this embodiment, the switch circuit K1 includes a diode, an anode of the diode is connected to the output terminal of the operational amplifier, a cathode of the diode is connected to the input terminal of the current control circuit 10222, and the diode is capable of disconnecting the path between the sampling circuit C1 and the current control circuit 10222 when the input voltage of the converter circuit 1021 is smaller than the preset value, and connecting the path between the sampling circuit C1 and the current control circuit 10222 when the input voltage of the converter circuit 1021 is larger than the preset value, and outputting the second current to the current control circuit 10222. Optionally, the switch circuit K1 may also include a switch circuit based on a COMP pin, or may also include a switch circuit based on an FB pin, which is not limited herein.

In addition, the above description uses an analog circuit to implement the function of the control circuit, but in practical application, in an embodiment, the function of the control circuit can also be implemented by a digital circuit. The control circuit 1022 is configured to generate a first signal according to the input voltage of the transform circuit 1021 and the preset value, and perform an operation on the first signal and a preset control signal to obtain a second signal; the preset control signal is used for controlling the output current of the conversion circuit to be preset output current; and a conversion circuit 1021 for increasing a pulse duty ratio of a control signal of the conversion circuit 1021 according to the second signal to output the first current.

In this embodiment, the function of the control circuit may be implemented by a digital circuit, for example, a chip with a data operation function is used to perform the function of the control circuit, the input voltage of the conversion circuit 1021 and the preset value are input into the chip to be operated, a second signal is output, and the second signal is fed back to the conversion circuit, so that the conversion circuit increases the duty ratio of the control signal of the control circuit according to the second signal.

In this embodiment, the data circuit can generate the first signal according to the input voltage and the preset value of the conversion circuit, and the first signal and the preset control signal are operated to obtain the second signal, so that the conversion circuit can increase the pulse duty ratio of the control signal of the conversion circuit according to the second signal to output the first current higher than the preset output current, and thus, the circuit structure of the current control circuit for realizing the function of the control circuit can be simpler.

On the basis of the foregoing embodiments, an embodiment of the present application further provides a power adjustment circuit, where the power adjustment circuit further includes: a first charge-discharge module 103, configured to charge according to an output current of the transformer circuit 101 or discharge the converter circuit 102; the charging capacity of the first charging-discharging module 103 is smaller than a preset first capacity value.

As shown in fig. 14, for example, the first charge-discharge module includes a first capacitor 1031, and a schematic diagram of a power adjustment circuit is provided, in this embodiment, the first charge-discharge module 103 includes the first capacitor 1031, two ends of the first capacitor 1031 are respectively connected to a first common terminal X1 and a second common terminal Y1, the first common terminal X1 is a common terminal between an anode output terminal of the transformer circuit 101 and a cathode input terminal of the conversion circuit 102, and the second common terminal Y1 is a common terminal between a cathode output terminal of the transformer circuit 101 and a cathode input terminal of the conversion circuit 102; the capacitance of the first capacitor 1031 is smaller than the first capacitance value.

In this embodiment, the voltage output from the transformer circuit 101 enters the conversion circuit 102 as the input voltage Vr of the conversion circuit 102, and charges the first charge-discharge module 103. After the first charge-discharge module 103 is fully charged, the first charge-discharge module 103 discharges to the conversion circuit 102 at the same time.

In the AC/DC of the related art, the average values of the input power and the output power of the AC/DC are almost equal, but the instantaneous value of the input power and the instantaneous value of the output power are greatly different, mainly because the charging capacity of the charging and discharging capacitor of the AC/DC of the related art is large, which causes the generation of instantaneous power.

Specifically, the first capacity value may be determined according to the actual output power, for example, the first capacity value may be set to 2uf if the output power is set to 10W, so that the output capacitance of the transformer circuit 101 is set to a smaller capacity value, so that the instantaneous power consumed on the first capacitor 1031 is smaller, the first capacitor 1031 takes more instantaneous power of the switching frequency, and the instantaneous power does not have a larger difference before and after the first capacitor 1031.

That is, when the first capacitor 1031 is small enough, the current on the first capacitor 1031 is small enough, the output power of the transformer circuit 101 is closer to the input power of the converter circuit 102, and since the input power of the transformer circuit 101 is equal to the output power of the transformer circuit 101, the input power of the converter circuit 102 = the output power of the converter circuit 102, so the instantaneous value of the input power of the transformer circuit 101 can be made closer to the instantaneous value of the output power of the converter circuit 102.

In addition, in the heavy load situation, the waveforms of the input voltage and the output voltage of the transformer circuit 101 are similar, and the ratio of the voltage amplitudes is equal to the turn ratio of the transformer circuit 101, therefore, the first capacitor 1031 is small enough to make the input voltage waveform of the transformer circuit 101 similar to the input voltage waveform of the converting circuit 102.

Based on this, in the embodiment of the present application, by setting the first charge-discharge module and setting the charging capacity of the first charge-discharge module to be small enough (that is, smaller than the first capacity value), the instantaneous value of the output power of the conversion circuit is substantially equal to the instantaneous value of the input power of the transformer circuit, and the input voltage value of the conversion circuit is a given sine wave and has the same waveform as the input voltage of the transformer circuit, so that the input current value can follow the input voltage value by allowing the instantaneous value of the output power to follow the input voltage value, which is equivalent to implementing the PFC function.

On the basis of fig. 14, the power adjustment circuit 10 according to the embodiment of the present application further includes: a rectifying circuit 104 for converting alternating current supplied from a power supply into direct current; the second charge-discharge module 105 is configured to charge according to the direct current or discharge to the transformer circuit 101, and a charge capacity of the second charge-discharge module 105 is smaller than a preset second capacity value.

As shown in fig. 15, the second charge-discharge module 105 includes a second capacitor 1051 as an example to illustrate the power adjustment circuit, in an embodiment, the second charge-discharge module 105 includes the second capacitor 1051, two ends of the second capacitor 1051 are respectively connected to a third common end X2 and a fourth common end Y2, the third common end X2 is a common end between the positive output end of the rectifying circuit 104 and the positive input end of the transformer circuit 101, and the fourth common end Y2 is a common end between the negative output end of the rectifying circuit 104 and the negative input end of the transformer circuit 101; the capacitance of the second capacitor 1051 is less than the second capacitance value.

In this embodiment, a rectifying circuit 104 and a second charge-discharge module 105 are connected between the transformer circuit 101 and the power Vin. The ac Vin provided by the power supply enters the rectifier circuit 104, is converted into dc by the rectifier circuit 104, and then is output, on one hand, the dc Vin enters the transformer circuit 101 as the input voltage of the transformer circuit 101, and on the other hand, the second charging/discharging module 105 is charged. After the second charge-discharge module 105 is fully charged, the second charge-discharge module 105 simultaneously discharges to the transformer circuit 101.

Similarly, in order to avoid a large difference between the instantaneous value of the input power and the instantaneous value of the output power in the AC/DC, the charging capacity of the second charge-discharge module 105 is set to be smaller than the preset second capacity value, that is, the capacitance of the second capacitor 1051 is smaller than the second capacity value. It is understood that the first capacitance value in the above embodiment and the second capacitance value in the embodiment may be the same or different, for example, the output power is 10W, the first capacitance value may be 10uf, and the second capacitance value may also be 10uf; alternatively, the output power is 10W, the first capacity value may be set to 8uf, and the second capacity value may be set to 10uf. The first capacitance value and the second capacitance value are not limited in the embodiments of the present application, and may be set specifically according to actual conditions.

The output capacitance of the rectifier circuit 104 is set to a smaller capacitance value, so that the instantaneous power consumed on the second capacitor 1051 is smaller, the second capacitor 1051 bears more instantaneous power of the switching frequency, and the instantaneous power does not have a larger difference before and after the second capacitor 1051.

That is, when the second capacitor 1051 is small enough, the current on the second capacitor 1051 is small enough, and the output power of the rectifying circuit 104 is closer to the input power of the transformer circuit 101, since the input power of the power Vin connected to the front end of the rectifying circuit 104 into the rectifying circuit 104 is equal to the output power of the rectifying circuit 104, and the input power of the transformer circuit 101 is equal to the output power of the transformer circuit 101, making the output power of the rectifying circuit 104 closer to the input power of the transformer circuit 101 is equivalent to making the instantaneous value of the output power of the power closer to the instantaneous value of the output power of the transformer circuit 101.

In conjunction with the above-mentioned first capacitor 1031 being small enough to make the instantaneous value of the input power of the transformer circuit 101 closer to the instantaneous value of the output power of the converter circuit 102, setting both the first capacitor 1031 and the second capacitor 1051 to sufficiently small capacitances enables the instantaneous value of the input power of the power source Vin into the rectifier circuit 104 to be closer to the instantaneous value of the output power of the converter circuit 102 as a whole in fig. 15.

Therefore, in the embodiment of the application, the first charge-discharge module and the second charge-discharge module are arranged, and the charge capacity of the first charge-discharge module and the charge capacity of the second charge-discharge module are set to be small enough, so that the instantaneous value of the output power of the conversion circuit is substantially equal to the instantaneous value of the input power of the power Vin entering the rectification circuit, and the input voltage value of the conversion circuit is a given sine wave and is the same as the waveform of the input voltage of the transformer circuit.

In an embodiment, taking the rectifier circuit as a rectifier bridge, the transformer circuit as DCX, and the converter circuit as DC/DC, for example, the first charge-discharge module and the second charge-discharge module are provided, and the charging capacity of the first charge-discharge module and the charging capacity of the second charge-discharge module are set to be small enough, so that the instantaneous value of the output power of the converter circuit is substantially equal to the instantaneous value of the input power of the power Vin into the rectifier circuit, so as to implement the PFC function.

As shown in fig. 16, the power adjusting circuit provided in this embodiment specifically adopts a two-stage architecture of DCX + DC/DC, DCX can implement soft switching, and can achieve relatively high efficiency under high power, and DC/DC can make up for the voltage adjusting capability of DCX, so that the power adjusting circuit can achieve voltage stable output.

In fig. 16, c1 and c2 both select the capacitance values as small as possible, for example, c1 is smaller than the first capacity threshold, and c2 is smaller than the second capacity threshold, so that the instantaneous power consumed by the power adjusting circuit on the capacitors c1 and c2 is smaller, and there is no great difference between the instantaneous power before and after the capacitors c1 and c2, in which case, the capacitors c1 and c2 bear more instantaneous power of the switching frequency.

When c1 and c2 are sufficiently small, ic1 and Ic2 will be sufficiently small, then Iac Vac = Irecout Vrecout will be closer to Idcxin Vrecout. Similarly, idcdcin Vdcdcin = Idcdcout Vdcdcout will be closer to Idcxout. This makes the instantaneous value of Iac Vac closer to Idcdcout Vdcdcout.

And because of adopting DCX circuit, there is a characteristic in DCX: under heavy load conditions, the waveforms of the input voltage and the output voltage of DCX are similar, and the ratio of the voltage amplitudes is equal to the turn ratio of the DCX transformer, based on which decreasing c1 and c2 makes the waveform of Vrecout more similar to Vdcdcin.

Therefore, in this embodiment, by adopting a DCX + DC/DC two-stage architecture, the capacitance after the rectifier bridge and the DCX output capacitance are both set to be smaller capacities, which not only makes the Vrecout waveform similar to the Vdcdcin waveform, but also makes the instantaneous value of the input power (the power of the power Vin entering the rectifier bridge) of the power adjusting circuit approximately equal to the instantaneous value of the output power (the output power of DC/DC). The instantaneous value of the output power of the power adjusting circuit follows the value of the input voltage of the power adjusting circuit, which is equivalent to the effect of dynamically adjusting the output power of the power adjusting circuit along with the input voltage of the power adjusting circuit.

Further, on the premise that the instantaneous value of the output power of the power regulation circuit follows the input voltage value of the power regulation circuit, the purpose that the input current value follows the input voltage value, namely the function which can be realized by the PFC circuit, can be realized by combining the fact that the waveform of the power Vin is a known sine wave. Therefore, in the embodiment of the application, by adopting a DCX + DC/DC two-stage architecture, the capacitor behind the rectifier bridge and the DCX output capacitor are set to be smaller in capacity, and the PFC function can be realized without adding a special PFC circuit.

The foregoing embodiments are directed to the description of the process by which the output power of the power regulating circuit increases as the input voltage of the power regulating circuit increases. The following describes a process of dynamically reducing the output power of the power adjustment circuit as the input voltage of the power adjustment circuit decreases.

Referring to fig. 2, in an embodiment, a power adjustment circuit 10 according to an embodiment of the present disclosure includes: a transformer circuit 101 for converting a voltage supplied from a power supply and supplying an input voltage to the converter circuit 102; a conversion circuit 102, configured to control the output power of the power adjustment circuit 10 to be a preset output power when the input voltage is greater than a preset value; when the input voltage is smaller than the preset value, the output power of the power adjusting circuit 10 is controlled to be a second power lower than the preset output power.

For the connection relationship between the transformer circuit 101 and the conversion circuit 102 in fig. 2 and the specific implementation structure of the transformer circuit 101, reference may be made to the description in the foregoing embodiments, and details are not repeated here.

In fig. 2, the transformer circuit 101 transforms the voltage provided by the power Vin, and the output transformed voltage is used as the input voltage Vr of the converter circuit 102, so that the converter circuit 102 can regulate the output power of the whole power adjusting circuit 10 according to the input voltage Vr, so that when the input voltage Vr is in different ranges, the output power of the power adjusting circuit 10 changes accordingly, that is, the output power of the power adjusting circuit 10 changes accordingly along with the change of the power Vin.

Specifically, based on the voltage Vr output after the voltage Vin provided by the transformer circuit 101 performs voltage conversion, the voltage Vr enters the conversion circuit 102, and when the input voltage Vr is greater than a preset value, the conversion circuit 102 controls the output power of the power adjustment circuit 10 to be the preset output power Pout _ S; when the input voltage Vr is smaller than the predetermined value, the converting circuit 102 controls the output power of the power adjusting circuit 10 to be the second power Pout _ m lower than the predetermined output power Pout _ S. For the situation that the input voltage Vr is equal to the preset value, which is a critical situation at this time, the situation that the input voltage Vr is equal to the preset value may be classified into a scenario that the input voltage Vr is smaller than the preset value, that is, when the input voltage Vr is equal to the preset value, the conversion circuit 102 may control the output power of the power adjustment circuit 10 to be the second power Pout _ m lower than the preset output power Pout _ S; of course, the input voltage Vr equal to the preset value may also be divided into a scenario where the input voltage Vr is greater than the preset value, that is, when the input voltage Vr is equal to the preset value, the conversion circuit 102 may control the output power of the power adjustment circuit 10 to be the preset output power Pout _ S.

The preset value is a value set according to an actual situation, for example, the preset value may be a preset fixed voltage, or a voltage value corresponding to a highest point in the input voltage, or a voltage value determined according to a direct current component in the input voltage, and the like. The preset output power may also be a fixed power output by the conversion circuit 102 in a preset manner. The fixed power can be determined according to the voltage value of the input voltage, and also can be a power value set according to the actual requirement as the preset output power.

In one embodiment, the preset value is determined according to the output power of the power adjusting circuit 10 and the output current of the transformer circuit 101.

That is, when the preset value is set, the two factors of the output power of the power adjusting circuit 10 and the output current of the transformer circuit 101 need to be considered and set.

For example, in the process of controlling the output power of the power adjusting circuit 10, it is necessary to take the output current of the power adjusting circuit 10 into consideration, when the input voltage of the converting circuit 102 is smaller than a preset value, the output current of the power adjusting circuit 10 is controlled to follow the input voltage, and when the input voltage of the converting circuit 102 is larger than the preset value, the power adjusting circuit 10 is controlled to maintain constant current output.

At this time, when the power adjusting circuit 10 outputs a constant current, the output power is the maximum, and then the selected preset value must satisfy the condition that the power adjusting circuit 10 can reach the maximum output power in the process that the output current changes along with the change of the input voltage. For example, the preset value may be a voltage value corresponding to the maximum output power of the power adjusting circuit 10.

In addition, in practical applications, the current that can be borne by the transformer circuit 101 is also limited, and naturally, the output voltage of the transformer circuit 101 is also limited, and the output voltage of the transformer circuit 101 is the input voltage of the converter circuit 102. Based on this, the output voltage of the transformer circuit 101 needs to be considered when selecting the preset value, so as to ensure that the output current of the power adjusting circuit 10 follows the input voltage, for example, the selected preset value may be any voltage value within the variation range of the output voltage of the transformer circuit 101. Thus, considering the output voltage of the transformer circuit 101 is equivalent to considering the output current of the transformer circuit 101.

In another embodiment, the determining of the preset value includes: detecting the input voltage of the conversion circuit according to a preset frequency; the preset frequency is smaller than a preset frequency threshold; and taking the maximum value of the input voltage detected in a period corresponding to the preset frequency as a preset value.

The preset frequency is a frequency for detecting the highest point of the input voltage in a certain period, and is set to be as low as possible in order to ensure that the highest point can be detected, for example, the preset frequency may be 1Hz, that is, the input voltage Vr of the conversion circuit is detected once every 1 s.

For example, every 1s, the input voltage Vin of the conversion circuit is detected, and when a maximum value Vin _ max of a corresponding input voltage is detected, in one manner, the Vin _ max may be determined as a preset value all the time; in another mode, the maximum value of the input voltage detected in each period corresponding to the preset frequency is used as the preset value in the corresponding period, and the preset value in each period may be different, that is, the preset value may change with the change of the input voltage. Therefore, the input voltage of the conversion circuit is detected according to the preset frequency, and the highest point of the input voltage of the conversion circuit can be detected more accurately due to the fact that the preset frequency is smaller than the preset frequency threshold.

Equivalently, when the input voltage Vr is greater than the preset value, the power finally output by the power adjustment circuit 10 is a fixed power Pout _ S, i.e., constant power output is maintained; when the input voltage Vr is smaller than the preset value, the power finally output by the power adjustment circuit 10 is the second power Pout _ m, and the second power Pout _ m is smaller than the fixed power Pout _ S.

Referring to fig. 17, when the current input voltage Vin is 75V, that is, the input voltage is greater than the preset value of 75V, the output power of the power adjustment circuit 10 is the preset power Pout _ S, which is a fixed value; however, if the current input voltage A1 is less than 75V, the output power of the power adjustment circuit 10 is the second power Pout _ m, and the second power Pout _ m is less than the preset power Pout _ S. It is understood that A1 is only a reference that is less than the input voltage 75V, and the corresponding second power Pout _ m may be different for different A1. The embodiment of the application does not limit the specific numerical values of the preset value, the preset output power and the second power.

The power adjusting circuit provided by the embodiment of the application comprises a transformer circuit and a conversion circuit, wherein the transformer circuit converts the voltage provided by a power supply and then provides input voltage for the conversion circuit, the conversion circuit controls the output power of the power adjusting circuit to be preset output power when the input voltage is larger than a preset value, and controls the output power of the power adjusting circuit to be second power lower than the preset output power when the input voltage is smaller than the preset value. Therefore, when the input voltage is larger than the preset value, the power adjusting circuit keeps the output power constant by the preset output power, and when the input voltage is smaller than the preset value, the output power of the power adjusting circuit is controlled to be the first power lower than the preset output power, so that the output power can be dynamically adjusted along with the input voltage, and the voltage efficiency can be guaranteed to be maximized no matter how the input voltage changes. Considering from the efficiency dimension of the whole circuit, the output power is dynamically followed with the input voltage, so that the ratio of the effective power to the apparent power of the whole circuit is relatively large, namely, the power factor is improved, and the PFC function is realized. Therefore, the power regulation circuit provided by the embodiment of the application can realize the PFC function on the premise of not adding a special PFC circuit, thereby reducing the size of the power adapter and avoiding the heating of the power adapter.

Similarly, for convenience and fast output power adjustment, when the conversion circuit 102 dynamically adjusts the output power according to the input voltage Vr, the output power can be adjusted by adjusting the output voltage and the output current, which will be described below.

In one embodiment, a process of dynamically adjusting the output power Pout according to the input voltage Vr by adjusting the output voltage is described; with continued reference to fig. 4, the conversion circuit 102 of this embodiment is based on the above embodiment and includes: a conversion circuit 1021 for performing voltage conversion on the input voltage and outputting the converted voltage; the control circuit 1022 is configured to control the output voltage of the conversion circuit to be a preset output voltage when the input voltage is greater than the preset value, so that the output power of the power adjustment circuit is a preset output power; and when the input voltage is smaller than the preset value, controlling the output voltage of the conversion circuit to be a fourth voltage lower than the preset output voltage, so that the output power of the power adjusting circuit is a second power lower than the preset output power.

In fig. 4, the connection relationship between the conversion circuit 1021 and the control circuit 1022 and the functional structure of the conversion circuit 1021 can be referred to the description of the foregoing embodiments, which are not limited in the embodiments of the present application.

In fig. 4, the output terminal Vout of the converting circuit 1021 outputs the predetermined output voltage, or the fourth voltage outputted by the output terminal Vout of the converting circuit 1021 is obtained by performing negative compensation on the output voltage of the converting circuit 102 if the input voltage of the converting circuit 102 is lower than the predetermined value, so that the output voltage of the converting circuit 102 can be reduced with the reduction of the input voltage.

Specifically, after the conversion circuit 1021 performs voltage conversion on the input voltage Vr to output the voltage Vout, and when the input voltage Vr is greater than the preset value, the control circuit 1022 controls the output voltage Vout to be the preset output voltage Vout _ S, so that the output power Pout of the power adjustment circuit 10 is the preset output power Pout _ S; when the input voltage Vr is smaller than the preset value, the output voltage Vout is controlled to be a second voltage Vout _ m lower than the preset output voltage Vout _ S, so that the output power of the power adjusting circuit 10 is a second power Pout _ m lower than the preset output power Pout _ S. It can be understood that, in this embodiment, after the preset output voltage Vout _ S is determined, the value of the corresponding preset output power is the power calculated by the preset output voltage Vout _ S and the output current; similarly, after the second voltage Vout _ m is determined, the corresponding second power Pout _ m is also the power calculated based on the second voltage Vout _ m and the output current. For the case that the input voltage Vr is equal to the preset value, the scenario that the input voltage Vr is greater than the preset value may be attributed, and the description of the foregoing embodiment may be specifically referred to, which is not limited in the embodiment of the present application.

The preset output voltage may be a fixed voltage value of an output preset for the transformation circuit 1021. The fixed voltage value can be determined according to the voltage value of the input voltage, and also can be set as a preset output voltage according to the actual requirement. For example, the input voltage is 9V, and the preset output voltage is set to a fixed voltage of 5V.

As shown in fig. 18, the specific data is combined for explanation, for example, when the preset value is 9V, the current input voltage Vr is 9V, that is, the input voltage is greater than the preset value of 9V, the output voltage of the transformation circuit 1021 is the preset output voltage of 5V, which is a fixed value; however, if the current input voltage is A1 and A1 is smaller than 9V, that is, the input voltage is smaller than the preset value of 9V, the output voltage of the transforming circuit 1021 is the second voltage B1, and the second voltage B1 is smaller than the preset output voltage of 5V. It is understood that A1 is only a reference smaller than the input voltage 9V, and the corresponding fourth voltage may be different for different A1. The embodiment of the application does not limit the preset value, the preset output voltage and the specific value of the fourth voltage.

The conversion circuit in the embodiment comprises a conversion circuit and a control circuit, wherein the conversion circuit converts the voltage of the input voltage and outputs the converted voltage, and the control circuit controls the output voltage of the conversion circuit to be the preset output voltage when the input voltage is greater than the preset value, so that the output power of the power regulation circuit is the preset output power; when the input voltage is smaller than the preset value, the output voltage of the conversion circuit is controlled to be a first voltage lower than the preset output voltage, so that the output power of the power adjusting circuit is a second power lower than the preset output power. Therefore, when the input voltage is greater than the preset value, the stable voltage output is kept by the preset output voltage, and the circuit output is ensured to be the preset output power; when the input voltage is smaller than the preset value, the output voltage is controlled to be a fourth voltage lower than the preset output voltage, and the output power is ensured to correspond to a second power smaller than the preset output power, so that the output power is dynamically adjusted according to the input voltage by adjusting the output voltage.

On the basis of the above-described embodiment, a different embodiment is provided below for the manner of determining the fourth voltage.

In one embodiment, the fourth voltage is a difference between the predetermined output voltage and a compensation voltage, and the compensation voltage is related to the input voltage.

With reference to fig. 4, when the input voltage Vr is smaller than the predetermined value, the output voltage of the transforming circuit 1021 is a fourth voltage, which may be a difference between the predetermined output voltage and a compensation voltage. By subtracting a compensation voltage from the preset output voltage as a fourth voltage, which is a voltage value finally output by the conversion circuit 1021 after the input voltage is decreased, so that the compensation voltage is subtracted from the preset output voltage as a voltage value finally output by the conversion circuit 1021 when the input voltage Vr is decreased, the final output voltage of the conversion circuit 1021 is decreased as the input voltage Vr is decreased, and the output power Pout of the conversion circuit 102 is a second power lower than the preset output power.

In one embodiment, the compensation voltage may be a predetermined fixed voltage value. For example, the range smaller than the input voltage Vr is graded, and one level sets one compensation voltage as a fixed value, specifically, if less than 0.5V is graded, and the preset value is 9V, if the input voltage is between 8.5V and 9V, the compensation voltage is set as a fixed voltage value X1, if the input voltage is between 8V and 8.5V, the compensation voltage is set as a fixed voltage value X2, and so on, and corresponding fixed compensation voltages are set for input voltages of different levels in sequence.

In another embodiment, a mapping table may be established by combining big data presets, where different compensation voltage values corresponding to different input voltage values are stored in the mapping table, for example, 8.9V corresponds to a compensation voltage X1,8.8V corresponds to a compensation voltage X2, and so on. When the voltage-level-difference compensation circuit is applied, the compensation voltage value corresponding to the current input voltage is directly inquired from the mapping table, and then the difference between the inquired compensation voltage value and the preset output voltage is determined as the fourth voltage.

The difference between the input voltage Vr and the preset value represents the increase of the current input voltage Vr, and based on the increase, the current input voltage Vr can be reduced through some operations to obtain a voltage value, and the voltage value can be used as a compensation voltage. For example, the difference between the input voltage Vr and the preset value may be transformed by a preset algorithm model, that is, the difference between the input voltage Vr and the preset value is input into the preset algorithm model, and is reduced by the algorithm model, and the reduced output voltage value is determined as the compensation voltage; or, a difference between the input voltage Vr and a preset value can be reduced by using a device such as an operational amplifier to obtain a compensation voltage value; or, according to a preset scale factor, carrying out reduction operation on the difference value between the input voltage Vr and a preset value to obtain a compensation voltage value; or, in some embodiments, a variation may be preset, and the difference between the input voltage Vr and the preset value is further subtracted by the variation to obtain the compensation voltage value.

And obtaining a compensation voltage value by carrying out reduction operation on the difference between the input voltage Vr and a preset value. In this way, the reduction operation is carried out by taking the difference value between the input voltage Vr and the preset value as the reference, and the reduction operation can be carried out according to the actual requirement, so that the negative compensation can be more accurately carried out on the output voltage of the conversion circuit, and the conversion circuit can accurately output the corresponding fourth voltage; moreover, the output voltage is accurately compensated in the negative direction, so that the over-compensation condition can be avoided, and the effect of protecting the conversion circuit is achieved.

In an embodiment, the compensation voltage may also be implemented by a circuit structure, the control circuit 1022 samples the input voltage Vr to obtain a sampled voltage, and operates on the sampled voltage to obtain the compensation voltage. Alternatively, the control circuit 1022 may compare the sampled voltage with a preset value, and then operate the sampled voltage when the sampled voltage is smaller than the preset value, so as to obtain the compensation voltage.

Any one of the above determining manners of the fourth voltage and the determining manner of the compensation voltage required for determining the fourth voltage are examples, and in practical application, the determining manner of the fourth voltage and the determining manner of the compensation voltage required for determining the fourth voltage may be adjusted according to practical requirements, which is not limited in this embodiment of the application.

Also, in the above description of the embodiments, the conversion circuit is provided in a structure in which the conversion circuit and the control circuit are connected, but it should be noted that in one embodiment, the conversion circuit and the control circuit may be integrated. When the actual product is realized, the control circuit integrated design can be realized in the conversion circuit, so that the control circuit integrated design is realized in the conversion circuit, more wiring space and extra occupied space of devices are saved, and the final conversion circuit product can be greatly reduced in size.

Referring to fig. 6, in one embodiment, a process of dynamically adjusting the output power Pout according to the input voltage Vr by adjusting the output current is described. In this embodiment, based on the above embodiment, the conversion circuit 102 includes: a conversion circuit 1021 for converting the input current and/or the input voltage and outputting the converted current and/or voltage; a control circuit 1022, configured to control the output current of the transformation circuit 1021 to be a preset output current when the input voltage is greater than a preset value, so that the output power of the power adjustment circuit 10 is a preset output power; when the input voltage is smaller than the preset value, the output current of the transformation circuit 1021 is controlled to be a second current lower than the preset output current, so that the output power of the power adjustment circuit 10 is a second power lower than the preset output power.

The connection relationship between the conversion circuit 1021 and the control circuit 1022 in fig. 6, and the function and structure of the conversion circuit 1021 are as described in the foregoing embodiments, and are not described again here.

The conversion circuit 1021 is a DC/DC converter, and optionally the control circuit 20 can be integrated inside the DCDC converter. The control circuit and the DCDC converter can be integrated, so that the control circuit is integrated and designed in the DCDC converter when an actual product is realized, more wiring space and extra occupied space of devices can be saved, and the volume of a final conversion circuit product can be greatly reduced.

In fig. 6, the output terminal Iout of the conversion circuit 1021 outputs the preset output current or the second current. The second current is a current obtained by adjusting the output current of the conversion circuit 102 if the input voltage of the conversion circuit 102 is lower than a preset value, so that the output current of the conversion circuit 102 is reduced along with the reduction of the input voltage.

For example, please continue to refer to the relationship diagram of the input voltage Vr, the input current Iin, and the output current Iout shown in fig. 8. In this embodiment, the conversion circuit 1021 outputs a current Iout after performing current conversion on the input current Iin, and the control circuit 1022 controls the output current Iout to be a preset output current Iout _ S when the input voltage Vr is greater than the preset value, so that the output power Pout of the power adjustment circuit 10 is a preset output power Pout _ S; when the input voltage Vr is smaller than the preset value, the output current Iout is controlled to be a second current Iout _ m lower than the preset output current Iout _ S, so that the output power of the power adjusting circuit 10 is a second power Pout _ m lower than the preset output power Pout _ S. For the case that the input voltage Vr is equal to the preset value, the scenario that the input voltage Vr is greater than the preset value may be attributed, and the description of the foregoing embodiment may be specifically referred to, which is not limited in the embodiment of the present application.

It can be understood that, in this embodiment, after the preset output current Iout _ S is determined, the corresponding value of the preset output power is the power calculated by the preset output current Iout _ S and the output voltage; similarly, after the second current Iout _ m is determined, the corresponding second power Pout _ m is also the power calculated based on the second current Iout _ m and the output voltage.

The preset output current may be a fixed current value of an output preset for the transformation circuit 1021. The fixed current value can be determined according to the input current, and can also be a current value set according to actual requirements as a preset output current.

As shown in fig. 19, for example, when the preset value is 9V and the current input voltage Vr is 9V, that is, the input voltage is greater than the preset value of 9V, the output current of the converting circuit 1021 is the preset output current 10A, which is a fixed value; however, if the current input voltage is A1 and A1 is smaller than 9V, that is, the input voltage is smaller than the preset value of 9V, the output current of the conversion circuit 1021 is the second current B1, and the second current B1 is smaller than the preset output current 10A. It is understood that A1 is merely a designation of less than the input voltage 9V, and that the corresponding second current may be different for different A1. The embodiment of the application does not limit the specific numerical values of the preset value, the preset output current and the second current.

The case that the preset value is 25V and the conversion circuit is connected with two different loads is taken as an example for explanation:

first, when the conversion circuit 1021 is connected to a Constant Voltage (CV) load, the output current Iout changes with the input voltage Vr when the input voltage Vr of the conversion circuit 1021 is smaller than 25V, and the output current Iout maintains a constant current output when the input voltage Vr of the conversion circuit 1021 is larger than 25V, and in this scenario, a change curve of the output current Iout of the conversion circuit 1021 is as shown in fig. 20.

Second, when the conversion circuit is connected to a Constant Resistance (CR) load, the output current Iout changes with the input voltage Vr when the input voltage Vr of the conversion circuit 1021 is smaller than 25V, and when the input voltage Vr of the conversion circuit 1021 is larger than 25V, the output current Iout maintains a constant current output, and in this scenario, a change curve of the output current Iout of the conversion circuit 1021 is as shown in fig. 21.

In this embodiment, the conversion circuit includes a conversion circuit and a control circuit, wherein the conversion circuit converts and outputs the input current and/or the input voltage, and the control circuit controls the output current of the conversion circuit to be a preset output current when the input voltage of the conversion circuit is greater than a preset value, so that the output power of the power adjustment circuit is the preset output power; when the input voltage is smaller than the preset value, controlling the output current of the conversion circuit to be a second current lower than the preset output current, so that the output power of the power adjusting circuit is a second power higher than the preset output power; therefore, when the input voltage is greater than the preset value, the stable current output is kept by the preset output current, and the output of the circuit is ensured to be the preset output power; when the input voltage is smaller than the preset value, the output current is controlled to be a second current lower than the preset output current, and the output power is ensured to correspond to the second power smaller than the preset output power, so that the output power is dynamically adjusted according to the input voltage by adjusting the output current.

In a scenario where the input voltage Vr of the conversion circuit 1021 is smaller than the preset value, the control circuit 1022 controls the output current of the conversion circuit to be a second current lower than the preset output current, in addition to the above embodiment, in an embodiment, the second current is obtained by reducing the pulse duty ratio of the output current of the conversion circuit 1021.

In this embodiment, when the input voltage Vr of the conversion circuit 1021 is smaller than the preset value, the control circuit 1022 needs to control the output current of the conversion circuit to be the second current, and the second current is a current lower than the preset output current, and the current can be controlled by controlling the pulse duty of the current, so that to make the output current of the conversion circuit 1021 be the second current, the pulse duty of the output current of the conversion circuit 1021 needs to be reduced so that the output current of the conversion circuit 1021 becomes the second current lower than the preset output current.

In this embodiment, the second current output by the conversion circuit is obtained by reducing the pulse duty ratio of the output current of the current change circuit, so that the second current can be flexibly adjusted by adjusting the pulse duty ratio of the output current of the conversion circuit, and the output current of the conversion circuit can meet wider application scenarios.

In another embodiment, the second current is obtained by adjusting a frequency of a control signal of the conversion circuit, or the second current is obtained by adjusting a frequency of a control signal corresponding to the preset output current.

In this embodiment, when the input voltage Vr of the converting circuit 1021 is smaller than the set value, the control circuit 1022 needs to control the output current of the converting circuit to be the second current, and the second current is a current lower than the preset output current, so that the output current of the converting circuit 1021 can be the second current lower than the preset output current by adjusting the frequency of the control signal of the converting circuit 1021. Alternatively, the output current of the converting circuit 1021 may be set to a second current lower than the preset output current by adjusting the frequency of the control signal corresponding to the preset output current.

In this embodiment, the second current output by the conversion circuit is obtained by adjusting the frequency of the control signal of the conversion circuit, or is obtained by adjusting the frequency of the control signal corresponding to the preset output current, so that the second current can be adjusted by adjusting the frequency of the control signal of the conversion circuit or adjusting the frequency of the control signal corresponding to the preset output current, and the diversity of the manner of adjusting the second current is further increased, so that the output current of the conversion circuit can meet a wider application scenario.

In a scenario that when the input voltage Vr of the conversion circuit 1021 is smaller than a preset value, the control circuit 1022 controls the output current of the conversion circuit to be a second current lower than the preset output current, and the second current is obtained by reducing a pulse duty ratio of the output current of the conversion circuit, on the basis of the foregoing embodiment, in an embodiment, the control circuit 1022 is configured to generate a fifth voltage according to the input voltage and the preset value, and operate the fifth voltage and the preset control voltage to obtain a sixth voltage; the preset control voltage is used for controlling the output current of the transformation circuit 1021 to be a preset output current; and a conversion circuit 1021 for reducing a pulse duty ratio of a control signal of the conversion circuit 1021 according to the sixth voltage to output the second current.

The controlled object in this application is the output current Iout of the conversion circuit 1021, the controlled input amount is the input voltage Vr of the conversion circuit 1021, and the correspondence between the two can be implemented by corresponding hardware circuits, that is, the output current Iout of the conversion circuit 1021 can be regulated and controlled by the voltage value generated by the control circuit 1022. Optionally, in this embodiment, the control circuit 1022 may perform operation on the input voltage of the transformation circuit 1021 and the preset value, increase the signal obtained by the operation to obtain a fifth voltage, and perform operation on the generated fifth voltage and a preset control voltage to obtain a sixth voltage; the preset control voltage is used for controlling the output current of the transformation circuit 1021 to be the preset output current. For example, the difference between the input voltage of the transform circuit 1021 and the preset value may be obtained, the difference may be amplified according to a preset scale factor to obtain a fifth voltage, and the fifth voltage and the preset control voltage may be further subjected to a differential operation to obtain a sixth voltage.

Optionally, the control circuit 1022 may include a differential amplifier, the differential amplifier performs a differential operation on the input voltage Vr of the conversion circuit 1021 and a preset value, the differential amplifier reduces the obtained differential signal to obtain a fifth voltage, then, the differential amplifier performs a differential operation on the obtained fifth voltage and the preset control voltage to obtain a sixth voltage, the sixth voltage is fed back to the COMP pin of the conversion circuit, and the conversion circuit increases the duty ratio of the control signal of the conversion circuit according to the sixth voltage on the COMP pin, so as to output the second current.

In this embodiment, the control circuit may generate the fifth voltage according to the input voltage and the preset value of the conversion circuit, so that the fifth voltage and the preset control voltage for controlling the output current of the conversion circuit to be the preset output current may be calculated to obtain the sixth voltage, and then the conversion circuit may increase the pulse duty ratio of the output current of the conversion circuit according to the sixth voltage to output the second current lower than the preset output current. That is to say, the conversion circuit can flexibly adjust the output current of the conversion circuit according to the output current value of the control circuit, so that the output current of the conversion circuit can change along with the change of the input voltage, and the output current of the conversion circuit can meet wider application scenes.

In a scenario where the control circuit 1022 generates a fifth voltage according to the input voltage and a preset value, and calculates the fifth voltage and the preset control voltage to obtain a sixth voltage. Based on the foregoing embodiments, in one embodiment, as shown in fig. 12, the control circuit 1022 includes a voltage feedforward circuit 10221 and a current control circuit 10222; the voltage feedforward circuit 10221 is used for stopping outputting voltage to the current control circuit 10222 when the input voltage of the conversion circuit is larger than the preset value; when the input voltage is smaller than the preset value, the fifth voltage is output to the current control circuit 10222 according to the input voltage and the preset value; a current control circuit 10222, configured to control an output current of the transform circuit 1021 to be a preset output current according to the preset control voltage when an input voltage of the transform circuit 1021 is greater than the preset value; when the input voltage of the conversion circuit 1021 is smaller than the preset value, the conversion circuit 1021 is controlled to output the second current according to the preset control voltage and the fifth voltage.

In this embodiment, when the input voltage of the conversion circuit 1021 is greater than the preset value, the control circuit 1022 needs to control the output current of the conversion circuit 1021 to be the preset output current, so as to perform constant current output, and at this time, the output current of the conversion circuit 1021 does not need to be adjusted, then the voltage feed-forward circuit 10221 in the control circuit 1022 will stop outputting voltage to the current control circuit 10222, the conversion circuit 1021 outputs constant current with the preset output current, for example, when the input voltage of the conversion circuit 1021 is 8V, and the preset value is 5V, the input voltage of the conversion circuit 1021 is greater than the preset value, at this time, the voltage feed-forward circuit 10221 stops outputting current to the current control circuit 10222, and the conversion circuit 1021 outputs constant current with the preset output current.

When the input voltage of the transforming circuit 1021 is smaller than the predetermined value, the control circuit 1022 needs to control the output current of the transforming circuit 1021 to be a second current lower than the predetermined output current. In this embodiment, the voltage feed-forward circuit 10221 in the control circuit 1022 may generate the fifth voltage according to the input voltage of the transformation circuit 1021 and the preset value, so that the current control circuit 10222 in the control circuit 1022 may control the transformation circuit 1021 to output the second current according to the fifth voltage and the preset control voltage.

For example, when the input voltage of the transforming circuit 1021 is 3V and the default value is 5V, when the input voltage of the transforming circuit 1021 is smaller than the default value, the voltage feed-forward circuit 10221 outputs a fifth voltage to the current control circuit 10222 according to the input voltage of the transforming circuit 1021 and the default value, and the current control circuit 10222 controls the transforming circuit 1021 to output the second current according to the preset control voltage and the fifth voltage.

Optionally, in this embodiment, the voltage feedforward circuit 10221 may perform a difference operation on the input voltage and a preset value, and reduce the obtained difference signal to obtain the fifth voltage, for example, a preset scale factor may be used to reduce the difference information. Or, in some scenarios, the fifth voltage may be obtained by scaling down the obtained differential signal according to a scaling factor, which is not limited in the embodiment of the present application. Alternatively, the current control circuit 10222 may perform a difference operation between a fifth voltage obtained by the voltage feedforward circuit 10221 and the preset output current to obtain a sixth voltage, so that the conversion circuit 1021 increases a pulse duty ratio of a control signal of the conversion circuit 1021 according to the sixth voltage to output the second stream.

In this embodiment, the voltage feedforward circuit 10221 can stop outputting voltage to the current control circuit 10222 when the input voltage of the conversion circuit is greater than a preset value, and the current control circuit 10222 can control the output current of the conversion circuit to be a preset output current according to the preset control voltage; when the input voltage of the converting circuit is smaller than the preset value, the voltage feed-forward circuit 10221 can output a fifth voltage to the current control circuit according to the input voltage of the converting circuit and the preset value, so that the current control circuit can control the converting circuit to output a second current according to the preset control voltage and the fifth voltage. Therefore, when the input voltage of the conversion circuit is greater than the preset value, the current output is kept stable by the preset output current, and when the input voltage of the current conversion circuit is less than the preset value, the output current of the conversion circuit is controlled to be the second current lower than the preset output current, namely, the final output current of the conversion circuit is reduced on the basis of the original stable output current, so that the output current of the conversion circuit is reduced along with the reduction of the input voltage of the conversion circuit, and the output current of the conversion circuit is correspondingly changed along with the change of the input voltage.

Based on the above embodiments, please continue to refer to fig. 12, in one embodiment, the voltage feed-forward circuit 10221 includes a sampling circuit C1 and a switch circuit K1; a sampling circuit C1 for comparing the input voltage of the conversion circuit 1021 with the preset value, and controlling a switch circuit K1 to open a path between the sampling circuit and the current control circuit 10222 when the input voltage of the conversion circuit 1021 is greater than the preset value; when the input voltage of the conversion circuit 1021 is smaller than the preset value, the switch circuit K1 is controlled to open the path between the sampling circuit C1 and the current control circuit 10222, and the second current is output to the current control circuit 10222.

For example, in this embodiment, taking the input voltage of the converting circuit 1021 as 3V and the preset value as 5V as an example, the sampling circuit C1 included in the voltage feed-forward circuit 10221 compares the input voltage of the converting circuit 1021 with the preset value, so as to obtain that the input voltage of the converting circuit is smaller than the preset value, and then the sampling circuit C1 controls the switch circuit K1 to open the path between the sampling circuit C1 and the current control circuit 10222, and outputs a fifth voltage to the current control circuit 10222, so that the current control circuit 10222 controls the output current of the converting circuit 1021 to be a second current lower than the preset output current according to the fifth voltage and the preset control voltage. For another example, when the input voltage of the conversion circuit 1021 is 7V and the preset value is 5V, the sampling circuit C1 compares the input voltage of the conversion circuit 1021 with the preset value, and the input voltage of the conversion circuit 1021 is greater than the preset value, the sampling circuit C1 will control the switch circuit K1 to open the path between the sampling circuit C1 and the current control circuit 10222, so that the current control circuit 10222 controls the constant current output of the conversion circuit 1021 according to the preset control voltage.

As to the specific implementation structure of the sampling circuit C1 and the switching circuit K1, as shown in fig. 13, the sampling circuit C1 includes an operational amplifier, a non-inverting input terminal of the operational amplifier is connected to an input terminal of the conversion circuit 1021, an inverting input terminal of the operational amplifier is used for inputting the preset value, an output terminal of the operational amplifier is connected to the switching circuit K1, and the sampling circuit C1 can compare the input voltage of the conversion circuit 1021 with the preset value through the operational amplifier. The switching circuit K1 includes a diode, an anode of the diode is connected to the output terminal of the operational amplifier, a cathode of the diode is connected to the input terminal of the current control circuit 10222, the diode is capable of disconnecting the path between the sampling circuit C1 and the current control circuit 10222 when the input voltage of the conversion circuit 1021 is greater than the preset value, and turning on the path between the sampling circuit C1 and the current control circuit 10222 and outputting a fifth voltage to the current control circuit 10222 when the input voltage of the conversion circuit 1021 is less than the preset value, so that the current control circuit 10222 controls the output current of the conversion circuit to be a second current lower than the preset output current according to the fifth voltage and the preset control voltage.

In practical applications, the function of the control circuit can be realized by a digital circuit. The control circuit 1022 is configured to generate a third signal according to the input voltage of the transforming circuit 1021 and the preset value, and perform an operation on the third signal and a preset control signal to obtain a fourth signal; the preset control signal is used for controlling the output current of the conversion circuit to be the preset output current; and a conversion circuit 1021 for reducing a pulse duty ratio of a control signal of the conversion circuit 1021 according to a fourth signal to output the second current.

In this embodiment, the function of the control circuit may be implemented by a digital circuit, for example, a chip with a data operation function is used to perform the function of the control circuit, the input voltage of the transformation circuit 1021 and the preset value are input into the chip to be operated, a fourth signal is output, and the fourth signal is fed back to the transformation circuit, so that the duty ratio of the control signal of the control circuit is reduced by the transformation circuit according to the fourth signal.

In this embodiment, the data circuit can generate a third signal according to the input voltage and the preset value of the conversion circuit, and the third signal and the preset control signal are operated to obtain a fourth signal, so that the conversion circuit can increase the pulse duty ratio of the control signal of the conversion circuit according to the fourth signal to output a second current higher than the preset output current, and thus, the circuit structure of the current control circuit that realizes the function of the control circuit can be simpler.

The power regulation circuit provided by the embodiment of the present application also includes a rectification circuit and a charging and discharging module, in the same case that the output power of the power regulation circuit increases with the increase of the input voltage of the power regulation circuit, and the output power of the power regulation circuit dynamically decreases with the decrease of the input voltage of the power regulation circuit.

Referring to fig. 22, the power adjustment circuit further includes: a third charge-discharge module 106, configured to charge according to the output current of the transformer circuit 101 or discharge the conversion circuit 102; the charging capacity of the third charging-discharging module 106 is smaller than a preset third capacity value.

As shown in fig. 22, taking the third charge-discharge module 106 including the third capacitor 1061 as an example, a schematic diagram of a power adjustment circuit is provided, in this embodiment, the third charge-discharge module 106 includes the third capacitor 1061, two ends of the third capacitor 1061 are respectively connected to the first common terminal X1 and the second common terminal Y1, the first common terminal X1 is a common terminal between the positive output terminal of the transformer circuit 101 and the positive input terminal of the conversion circuit 102, and the second common terminal Y1 is a common terminal between the negative output terminal of the transformer circuit 101 and the negative input terminal of the conversion circuit 102; the capacitance of the third capacitor 1061 is less than the third capacitance value.

In this embodiment, the voltage output from the transformer circuit 101 enters the conversion circuit 102 as the input voltage Vr of the conversion circuit 102, and charges the third charge-discharge module 106. After the third charge-discharge module 106 is fully charged, the third charge-discharge module 106 will discharge to the conversion circuit 102 at the same time.

In the AC/DC of the related art, the average values of the input power and the output power of the AC/DC are almost equal, but the instantaneous value of the input power and the instantaneous value of the output power are greatly different, mainly because the charging capacity of the charging and discharging capacitor of the AC/DC of the related art is large, which causes the generation of instantaneous power, and in view of this, in order to reduce the instantaneous power of the AC/DC, in the power adjustment circuit provided in the embodiment of the present application, the charging capacity of the third charging and discharging module 106 is smaller than the preset third capacity value, that is, the capacitance of the third capacitor 1061 is smaller than the third capacity value.

Specifically, the third capacity value may be determined according to the actual output power, for example, if the output power is 10W, the third capacity value may be set to 10uf, so that the output capacitance of the transformer circuit 101 is set to a smaller capacity value, so that the instantaneous power consumed on the third capacitor 1061 is smaller, the third capacitor 1061 bears more instantaneous power of the switching frequency, and the instantaneous power does not have a larger difference before and after the third capacitor 1061.

That is, when the third capacitor 1061 is small enough, the current on the third capacitor 1061 is small enough, and the output power of the transformer circuit 101 is closer to the input power of the converter circuit 102, and since the input power of the transformer circuit 101 is equal to the output power of the transformer circuit 101, the input power of the converter circuit 102 = the output power of the converter circuit 102, so that the instantaneous value of the input power of the transformer circuit 101 is closer to the instantaneous value of the output power of the converter circuit 102.

In addition, in heavy load condition, the waveforms of the input voltage and the output voltage of the transformer circuit 101 are similar, and the ratio of the voltage amplitudes is equal to the turn ratio of the transformer circuit 101, therefore, the third capacitor 1061 is small enough to make the input voltage waveform of the transformer circuit 101 similar to the input voltage waveform of the converting circuit 102.

Based on this, in the embodiment of the present application, by setting the third charge-discharge module and setting the charging capacity of the third charge-discharge module to be small enough (that is, smaller than the third capacity value), the instantaneous value of the output power of the conversion circuit is substantially equal to the instantaneous value of the input power of the transformer circuit, and the input voltage value of the conversion circuit is a given sine wave and has the same waveform as the input voltage of the transformer circuit, so that the input current value can follow the input voltage value by allowing the instantaneous value of the output power to follow the input voltage value, which is equivalent to implementing the PFC function.

On the basis of fig. 22, the power adjustment circuit 10 according to the embodiment of the present application further includes: a rectifying circuit 104 for converting alternating current supplied from a power supply into direct current; the fourth charge-discharge module 107 is configured to charge according to the direct current or discharge to the transformer circuit 101, and a charge capacity of the fourth charge-discharge module 107 is smaller than a preset fourth capacity value.

As shown in fig. 23, the fourth charge-discharge module 107 includes a fourth capacitor 1071 as an example to illustrate the power adjustment circuit, in an embodiment, the fourth charge-discharge module 107 includes the fourth capacitor 1071, two ends of the fourth capacitor 1071 are respectively connected to a third common terminal X2 and a fourth common terminal Y2, the third common terminal X2 is a common terminal between the positive output terminal of the rectification circuit 104 and the positive input terminal of the transformer circuit 101, and the fourth common terminal Y2 is a common terminal between the negative output terminal of the rectification circuit 104 and the negative input terminal of the transformer circuit 101; the capacitance of the fourth capacitor 1071 is less than the fourth capacitance value.

In this embodiment, a rectifying circuit 104 and a fourth charge-discharge module 107 are connected between the transformer circuit 101 and the power source Vin. The alternating current Vin supplied by the power supply first enters the rectifying circuit 104, and after being converted into direct current by the rectifying circuit 104 and output, the direct current enters the transformer circuit 101 as the input voltage of the transformer circuit 101 on one hand, and charges the fourth charging and discharging module 107 on the other hand. After the fourth charge-discharge module 107 is fully charged, the fourth charge-discharge module 107 simultaneously discharges to the transformer circuit 101.

Similarly, in order to avoid a large difference between the instantaneous value of the input power and the instantaneous value of the output power in the AC/DC, the charging capacity of the fourth charge-discharge module 107 is set to be smaller than a preset fourth capacity value in the embodiment of the present application, that is, the capacitance of the fourth capacitor 1071 is smaller than the fourth capacity value. It is understood that the third capacity value in the above embodiment and the fourth capacity value in the present embodiment may be the same or different, for example, the output power is 10W, the fourth capacity value may be set to 2uf, and the third capacity value may also be set to 2uf; alternatively, the output power is 10W, the third capacity value may be set to 3uf, and the fourth capacity value may be set to 3uf. The third capacitance value and the fourth capacitance value are not limited in the embodiments of the present application, and may be set specifically according to actual conditions.

The output capacitance of the rectifier circuit 104 is set to a smaller capacitance value, so that the instantaneous power consumed on the fourth capacitor 1071 is smaller, the fourth capacitor 1071 bears more instantaneous power of the switching frequency, and the instantaneous power does not have a larger difference before and after the fourth capacitor 1071.

That is, when the fourth capacitor 1071 is small enough, the current on the fourth capacitor 1071 will be small enough, and the output power of the rectifier circuit 104 is closer to the input power of the transformer circuit 101, since the input power of the power Vin connected to the front end of the rectifier circuit 104 into the rectifier circuit 104 is equal to the output power of the rectifier circuit 104, and the input power of the transformer circuit 101 is equal to the output power of the transformer circuit 101, making the output power of the rectifier circuit 104 closer to the input power of the transformer circuit 101 is equivalent to making the instantaneous value of the output power of the power closer to the instantaneous value of the output power of the transformer circuit 101.

In combination with the fourth capacitor 1071 being small enough to make the instantaneous value of the input power of the transformer circuit 101 closer to the instantaneous value of the output power of the converter circuit 102, the fourth capacitor 1071 and the third capacitor 1061 are both set to have a sufficiently small capacitance, so that the instantaneous value of the input power of the power source Vin to the rectifier circuit 104 is closer to the instantaneous value of the output power of the converter circuit 102 in the whole fig. 23.

Therefore, in the embodiment of the present application, by setting the third charge-discharge module and the fourth charge-discharge module, and setting the charging capacity of the third charge-discharge module and the charging capacity of the fourth charge-discharge module to be sufficiently small, the instantaneous value of the output power of the conversion circuit is substantially equal to the instantaneous value of the input power of the power Vin entering the rectification circuit, and the input voltage value of the conversion circuit is a given sine wave and has the same waveform as the input voltage of the transformer circuit, so that the input current value can follow the input voltage value by allowing the instantaneous value of the output power of the conversion circuit to follow the input voltage value, which is equivalent to implementing a PFC function.

In an embodiment, taking the rectifier circuit as a rectifier bridge, the transformer circuit as DCX, and the converter circuit as DC/DC, for example, the third charge-discharge module and the fourth charge-discharge module are provided, and the charging capacity of the third charge-discharge module and the charging capacity of the fourth charge-discharge module are set to be small enough, so that the instantaneous value of the output power of the converter circuit is substantially equal to the instantaneous value of the input power of the power Vin into the rectifier circuit, so as to implement the PFC function.

As shown in fig. 24, the power adjustment circuit provided in this embodiment specifically adopts a two-stage architecture of DCX + DC/DC, DCX can implement soft switching, and can achieve relatively high efficiency under high power, and DC/DC can make up for the voltage adjustment capability of DCX, so that the power adjustment circuit can achieve stable voltage output.

In fig. 24, c3 and c4 both select the capacitance values as small as possible, for example, c3 is smaller than the third capacity threshold, and c4 is smaller than the fourth capacity threshold, so that the instantaneous power consumed by the power adjusting circuit on the capacitors c3 and c4 is smaller, and there is no great difference between the instantaneous power before and after the capacitors c3 and c4, in which case, the capacitors c3 and c4 bear more instantaneous power of the switching frequency.

When c3 and c4 are sufficiently small, ic3 and Ic4 will be sufficiently small, then Iac Vac = Irecout Vrecout will be closer to Idcxin Vrecout. Similarly, idcdcin Vdcdcin = Idcdcout Vdcdcout will be closer to Idcxout. This makes the instantaneous value of Iac Vac closer to Idcdcout Vdcdcout.

And because of adopting the DCX circuit, there is a characteristic in DCX: under heavy load conditions, the waveforms of the input voltage and the output voltage of the DCX are similar, and the ratio of the voltage amplitudes is equal to the turn ratio of the DCX transformer, based on which decreasing c3 and c4 makes the waveform of Vrecout more similar to Vdcdcin.

Therefore, in this embodiment, by adopting a DCX + DC/DC two-stage architecture, the capacitance after the rectifier bridge and the DCX output capacitance are both set to have smaller capacities, which not only makes the Vrecout waveform similar to the Vdcdcin waveform, but also makes the instantaneous value of the input power (the power of the power Vin entering the rectifier bridge) of the power adjusting circuit approximately equal to the instantaneous value of the output power (the output power of the DC/DC). The instantaneous value of the output power of the power adjusting circuit follows the input voltage value of the power adjusting circuit, which is equivalent to the dynamic adjustment of the output power of the power adjusting circuit along with the input voltage of the power adjusting circuit.

Further, on the premise that the instantaneous value of the output power of the power adjusting circuit follows the input voltage value of the power adjusting circuit, the purpose that the input current value follows the input voltage value, namely the function which can be realized by the PFC circuit, can be realized by combining the fact that the waveform of the power Vin is a known sine wave. Therefore, in the embodiment of the application, by adopting a DCX + DC/DC two-stage architecture, the capacitor behind the rectifier bridge and the DCX output capacitor are set to be smaller in capacity, and the PFC function can be realized without adding a special PFC circuit.

In addition, the present embodiment also provides an electric energy providing device, which includes any one of the power adjusting circuits 10 provided in the previous embodiments.

The power adjusting circuit of the embodiment can dynamically adjust the output power according to the input voltage, and can realize the PFC function on the premise of not adding a special PFC circuit, thereby reducing the size of the power adapter and avoiding the heating of the power adapter.

In one embodiment, as shown in fig. 25, the power supply device includes an input interface 110, a rectifying and filtering module 120, a switching circuit 130, a power adjusting circuit 10, and an output interface 160, wherein the power adjusting circuit 10 includes a transformer circuit 101 and a converting circuit 102;

in this embodiment, the ac voltage may be input to the power supply device through the input interface 110, and the rectifying and filtering module 120 may receive the ac voltage transmitted through the input interface 110 and perform rectifying and filtering on the ac voltage to obtain a pulsating dc voltage having a first waveform; alternatively, the first waveform may be a steamed bun waveform. The switching circuit 130 may perform chopper modulation on the pulsating dc voltage output by the rectifying and filtering module 120 to obtain a pulsating voltage having a second waveform, which may be a square waveform. The transformer circuit 101 in the power adjusting circuit 10 provided in the embodiment of the present application may perform voltage transformation on the pulsating voltage obtained after chopper modulation by the switching circuit 130, and the voltage after voltage transformation is subjected to voltage adjustment by the converting circuit 102 in the power adjusting circuit 10 provided in the embodiment of the present application, and the adjusted voltage is output and filtered, so that a stable dc voltage can be obtained.

In another embodiment, as shown in fig. 26, the power supply device includes a rectifying and filtering circuit 210, a power adjusting circuit 10 and a wireless transmitting circuit 220, wherein the power adjusting circuit 10 includes a transformer circuit 101 and a converting circuit 102.

In this embodiment, the ac voltage is input to the power supply device and then enters the rectifying and filtering circuit 210, and is converted into a stable dc voltage by the rectifying and filtering circuit, and then the voltage is regulated to a fixed value by the power adjusting circuit 10 provided in this embodiment of the present application and supplied to the wireless transmitting circuit 220, and the wireless transmitting circuit inverts the dc voltage provided by the power adjusting circuit 10 into an ac voltage that can be coupled to the transmitting coil, so that the ac voltage is converted into an electromagnetic signal by the transmitting coil for transmission.

For example, taking the rectification filter circuit as AC/DC as an example, if the power adjustment circuit 10 provided in the embodiment of the present application includes DC/DC as an example, 220V alternating current output by a power grid is converted into stable direct current through AC/DC, and then the voltage is adjusted to a fixed value by the DC/DC conversion circuit in the power adjustment circuit 10 to be supplied to the wireless transmission circuit, and the wireless transmission circuit inverts the direct current provided by DC/DC into alternating current that can be coupled to the transmission coil, and converts the alternating current into an electromagnetic signal through the transmission coil for transmission.

In one embodiment, a terminal is also provided that includes any of the power regulation circuits 10.

As shown in fig. 27, the terminal includes a charging interface 310, a power adjusting circuit 10, a battery 320, and a control module 330; in the terminal, the power adjusting circuit 10 is connected between the charging interface 310 and the battery 320 at a position to convert the voltage input from the charging interface 310 and supply the converted voltage to the battery 320 for charging. The control module 330 is configured to control the converting circuit 01 to convert the input voltage.

In the embodiment of the present application, the terminal refers to any electronic device that requires an external power supply or an internal power supply, for example, various personal computers, notebook computers, mobile phones (smart mobile terminals), tablet computers, and portable wearable devices, and the embodiment is not limited thereto. If the power supply is an external power supply, the power supply may be a power adapter, a portable power source (e.g., a charger), or the like, which is not limited in this embodiment. Certainly, besides the terminal, the terminal may also be a device that needs a power supply, for example, an electric vehicle, an unmanned aerial vehicle, an electronic book, an electronic cigarette, an intelligent electronic device (including a watch, a bracelet, intelligent glasses, a sweeping robot, and the like), a small electronic product (including a wireless headset, a bluetooth sound, an electric toothbrush, a rechargeable wireless mouse, and the like), a (5G) communication module power supply, and the like, which are not limited in the embodiments of the present application.

In addition, in an embodiment, the present application further provides an embodiment of a power adjustment method, as shown in fig. 28, which relates to a specific process of implementing, by running a computer program, an increase in output power with an increase in input voltage. This embodiment then includes:

s101, converting the voltage provided by the power supply and providing input voltage.

S102, when the input voltage is smaller than a preset value, controlling the output power to be a preset output power; and when the input voltage is greater than the preset value, controlling the output power to be a first power higher than the preset output power.

The computer device may be configured to execute a corresponding operation after receiving a trigger of the program instruction, that is, according to a preset configuration, convert a voltage provided by the power supply and then provide an input voltage, that is, convert the voltage provided by the power supply and obtain a converted voltage, where the converted voltage is the input voltage. Then, the computer device can continue to execute the preset program instructions, analyze and judge the input voltage, compare the input voltage with the preset value, and adjust the output power according to the comparison result. For example, the adjustment manner may be to obtain a difference between the input voltage and a preset value, and output a feedback signal according to the difference and a preset output power to adjust the final output power, so as to ensure that the final output power is the preset output power itself or a first power that is increased based on the preset output power, thereby implementing a function that the output power is increased along with an increase of the input voltage.

Specifically, the method comprises the steps of firstly converting voltage provided by a power supply, then providing input voltage, and then controlling output power to be preset output power when the input voltage is smaller than a preset value; if the input voltage is larger than the preset value, the output power is controlled to be the first power higher than the preset output power through a program. The first power is the power compensated on the basis of the preset output power, and is the final output power. This achieves the effect that the final output power increases when the input voltage increases.

It will be appreciated that the above processes are implemented by computer program instructions provided to a processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing apparatus such that the instructions executed by the processor of the computer or other programmable data processing apparatus implement the present embodiments to implement dynamic adjustment of output power in accordance with changes in input voltage, thereby implementing dynamic increase in output power as input voltage increases. Of course, these computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means. Alternatively, these computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the computer program instructions which execute on the computer or other programmable apparatus implement the functions specified above.

In addition, in an embodiment, the present application further provides an embodiment of a power adjustment method, as shown in fig. 29, which relates to a specific process of implementing a decrease in output power with a decrease in input voltage by running a computer program. This embodiment then includes:

s201, converting the voltage provided by the power supply and providing input voltage.

S202, when the input voltage is larger than a preset value, controlling the output power to be a preset output power; and when the input voltage is smaller than the preset value, controlling the output power to be a second power lower than the preset output power.

In this embodiment, a program instruction for instructing power adjustment is also preset, and after receiving the trigger of the program instruction, the computer device executes a corresponding operation, that is, according to a preset configuration, the computer device converts the voltage provided by the power supply and then provides an input voltage, that is, converts the voltage provided by the power supply and obtains a converted voltage, where the converted voltage is the input voltage. Then, the computer device can continue to execute the preset program instructions, analyze and judge the input voltage, compare the input voltage with the preset value, and adjust the output power according to the comparison result. For example, the adjustment manner may be to obtain a difference between the input voltage and a preset value, and output a feedback signal according to the difference and a preset output power to adjust the final output power, so as to ensure that the final output power is the preset output power itself or a first power that is increased based on the preset output power, thereby implementing a function that the output power is increased along with an increase of the input voltage.

Specifically, firstly, converting the voltage provided by the power supply and then providing an input voltage, and then controlling the output power to be the preset output power when the input voltage is greater than a preset value; if the input voltage is smaller than the preset value, the output power is controlled to be a second power lower than the preset output power through a program. The second power is the power after negative compensation is performed on the basis of the preset output power, and is the power finally output. Therefore, when the input voltage is reduced, the final output power is also reduced.

It will be appreciated that the above processes are implemented by computer program instructions provided to a processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing apparatus such that the instructions executed by the processor of the computer or other programmable data processing apparatus implement the present embodiments to implement dynamic adjustment of output power in accordance with changes in input voltage, thereby implementing dynamic reduction of output power as input voltage is reduced. Of course, these computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means. Alternatively, these computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the computer program instructions which execute on the computer or other programmable apparatus implement the functions specified above.

In addition, an electronic device according to an embodiment of the present application further includes a memory and a processor, where the memory stores a computer program, and when the computer program is executed by the processor, the processor is enabled to execute any of the method steps for adjusting power provided in the foregoing embodiments.

Embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement any of the method steps for power adjustment provided by the foregoing embodiments.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A power regulation circuit, the power regulation circuit comprising:

the conversion circuit is used for controlling the output power of the power adjusting circuit to be preset output power when the input voltage is smaller than a preset value; and when the input voltage is greater than the preset value, controlling the output power of the power adjusting circuit to be a first power higher than the preset output power.

2. The power regulation circuit of claim 1, wherein the conversion circuit comprises:

the conversion circuit is used for performing voltage conversion on the input voltage and outputting the converted input voltage;

the control circuit is used for controlling the output voltage of the conversion circuit to be a preset output voltage when the input voltage is smaller than the preset value, so that the output power of the power adjusting circuit is the preset output power; when the input voltage is larger than the preset value, the output voltage of the conversion circuit is controlled to be a first voltage higher than the preset output voltage, so that the output power of the power adjusting circuit is a first power higher than the preset output power.

3. The power regulation circuit of claim 2 wherein the first voltage is a sum of the predetermined output voltage and a compensation voltage, the compensation voltage being related to the input voltage.

4. The power adjustment circuit of claim 3, wherein the compensation voltage is obtained by reducing a difference between the input voltage and the predetermined value.

5. The power conditioning circuit of claim 4 wherein the control circuit is configured to sample the input voltage to obtain a sampled voltage and to operate on the sampled voltage to obtain the compensation voltage.

6. The power adjustment circuit of claim 5, wherein the control circuit is further configured to compare the sampled voltage with the predetermined value, and when the sampled voltage is greater than the predetermined value, operate on the sampled voltage to obtain the compensation voltage.

7. The power regulation circuit of claims 2-6, wherein the conversion circuit and the control circuit are integratable.

8. The power conditioning circuit of claim 1, wherein the conversion circuit comprises:

the conversion circuit is used for converting the input current and/or the input voltage and then outputting the converted input current and/or input voltage;

the control circuit is used for controlling the output current of the conversion circuit to be a preset output current when the input voltage is smaller than the preset value, so that the output power of the power adjusting circuit is the preset output power; when the input voltage is larger than the preset value, controlling the output current of the conversion circuit to be a first current higher than the preset output current, so that the output power of the power adjusting circuit is a first power higher than the preset output power.

9. The power regulation circuit of claim 8 wherein the first current is obtained by increasing a pulse duty cycle of a control signal of the converter circuit.

10. The power adjustment circuit of claim 8, wherein the first current is obtained by adjusting a frequency of a control signal of the converter circuit, or wherein the first current is obtained by adjusting a frequency of a control signal corresponding to the preset output current.

11. The power adjustment circuit of claim 9, wherein the control circuit is configured to generate a second voltage according to the input voltage and the preset value, and operate the second voltage and a preset control voltage to obtain a third voltage; the preset control voltage is used for controlling the output current of the conversion circuit to be the preset output current;

the conversion circuit is used for increasing the pulse duty ratio of a control signal of the conversion circuit according to the third voltage so as to output the first current.

12. The power regulation circuit of claim 8, wherein the control circuit comprises a voltage feed forward circuit and a current control circuit;

the voltage feedforward circuit is used for stopping outputting voltage to the current control circuit when the input voltage of the conversion circuit is smaller than the preset value; when the input voltage is larger than the preset value, outputting a second voltage to the current control circuit according to the input voltage and the preset value;

the current control circuit is used for controlling the output current of the conversion circuit to be a preset output current according to the preset control voltage when the input voltage of the conversion circuit is smaller than the preset value; and when the input voltage is larger than the preset value, controlling the conversion circuit to output the first current according to the preset control voltage and the second voltage.

13. The power adjustment circuit of claim 8, wherein the control circuit is configured to generate a first signal according to the input voltage and the preset value, and operate the first signal and a preset control signal to obtain a second signal, and the preset control signal is configured to control the output current of the conversion circuit to be the preset output current;

the conversion circuit is used for increasing the pulse duty ratio of a control signal of the conversion circuit according to the second signal so as to output the first current.

14. The power conditioning circuit of claim 8, wherein the converter circuit is a DCDC converter, and wherein the control circuit is integratable with the DCDC converter.

15. The power regulation circuit of any one of claims 1-6, further comprising:

the first charging and discharging module is used for charging according to the output current of the transformer circuit or discharging to the conversion circuit; the charging capacity of the first charging and discharging module is smaller than a preset first capacity value.

16. The power conditioning circuit according to claim 15, wherein the first charge-discharge module comprises a first capacitor; the capacitance of the first capacitor is less than the first capacitance value.

17. The power conditioning circuit of any of claims 1-6, further comprising:

the rectifying circuit is used for converting alternating current provided by the power supply into direct current;

and the second charge-discharge module is used for charging according to the direct current or discharging to the transformer circuit, and the charge capacity of the second charge-discharge module is smaller than a preset second capacity value.

18. The power regulator circuit according to claim 17, wherein the second charge-discharge module comprises a second capacitor; the capacitance of the second capacitor is smaller than the second capacitance value.

19. The power regulation circuit of claim 2, wherein the predetermined value is determined based on an output power of the power regulation circuit and an output current of the transformer circuit.

20. A power regulation circuit, the power regulation circuit comprising:

the conversion circuit is used for controlling the output power of the power regulation circuit to be preset output power when the input voltage is larger than a preset value; and when the input voltage is smaller than the preset value, controlling the output power of the power adjusting circuit to be a second power lower than the preset output power.

21. The power conditioning circuit of claim 20, wherein the conversion circuit comprises:

the control circuit is used for controlling the output voltage of the conversion circuit to be a preset output voltage when the input voltage is larger than the preset value, so that the output power of the power adjusting circuit is a preset output power; and when the input voltage is smaller than the preset value, controlling the output voltage of the conversion circuit to be a fourth voltage lower than the preset output voltage, so that the output power of the power adjusting circuit is a second power lower than the preset output power.

22. The power conditioning circuit of claim 21 wherein the fourth voltage is a difference between the predetermined output voltage and a compensation voltage, the compensation voltage being related to the input voltage.

23. The power adjustment circuit of claim 22, wherein the compensation voltage is a scaled difference between the input voltage and the predetermined value.

24. The power conditioning circuit of claim 22 wherein the control circuit is configured to sample the input voltage to obtain a sampled voltage and to operate on the sampled voltage to obtain the compensation voltage.

25. The power adjustment circuit of claim 24, wherein the control circuit is further configured to compare the sampled voltage with the preset value, and when the sampled voltage is smaller than the preset value, operate on the sampled voltage.

26. The power regulation circuit of any one of claims 20-25 wherein the conversion circuit and the control circuit are integratable.

27. The power regulation circuit of claim 20, wherein the conversion circuit comprises:

the control circuit is used for controlling the output current of the conversion circuit to be the preset output current when the input voltage is larger than the preset value, so that the output power of the power adjusting circuit is the preset output power; when the input voltage is smaller than the preset value, controlling the output current of the conversion circuit to be a second current lower than the preset output current; and enabling the output power of the power adjusting circuit to be a second power lower than the preset output power.

28. The power conditioning circuit of claim 27 wherein the second current is derived by reducing a pulse duty cycle of a control signal of the converter circuit.

29. The power conditioning circuit of claim 27, wherein the second current is obtained by adjusting a frequency of a control signal of the converter circuit, or wherein the second current is obtained by adjusting a frequency of a control signal corresponding to the preset output current.

30. The power adjustment circuit of claim 28, wherein the control circuit is configured to generate a fifth voltage according to the input voltage and the preset value, and operate the fifth voltage and a preset control voltage to obtain a sixth voltage; the preset control voltage is used for controlling the output current of the conversion circuit to be the preset output current;

the conversion circuit is used for reducing the pulse duty ratio of a control signal of the conversion circuit according to the sixth voltage so as to output the second current.

31. The power conditioning circuit of claim 27, wherein the control circuit comprises a voltage feed forward circuit and a current control circuit;

the voltage feedforward circuit is used for stopping outputting voltage to the current control circuit when the input voltage of the conversion circuit is larger than the preset value; when the input voltage is smaller than the preset value, outputting a fifth voltage to the current control circuit according to the input voltage and the preset value;

the current control current is used for controlling the output current of the conversion circuit to be the preset output current according to the preset control voltage when the input voltage of the conversion circuit is larger than the preset value; and when the input voltage is smaller than the preset value, controlling the conversion circuit to output the second current according to a preset control voltage and the fifth voltage.

32. The power conditioning circuit of claim 28, wherein the control circuit is configured to generate a third signal according to the input voltage and the preset value, and perform an operation on the third signal and a preset control signal to obtain a fourth signal; the preset control signal is used for controlling the output current of the conversion circuit to be the preset output current;

the conversion circuit is used for reducing the pulse duty ratio of a control signal of the conversion circuit according to the fourth signal so as to output the second current.

33. The power conditioning circuit of claim 27 wherein the converter circuit is a DCDC converter and the control circuit is integratable with the DCDC converter.

34. The power regulation circuit of any one of claims 20-25, further comprising:

the third charge-discharge module is used for charging according to the output current of the transformer circuit or discharging to the conversion circuit; and the charging capacity of the third charging and discharging module is smaller than a preset third capacity value.

35. The power regulator circuit according to claim 34, wherein the third charge-discharge module comprises a third capacitor; the capacitance of the third capacitor is less than the third capacitance value.

36. The power regulation circuit of any one of claims 20-25, further comprising:

and the fourth charging and discharging module is used for charging according to the direct current or discharging to the transformer circuit, and the charging capacity of the fourth charging module is smaller than a preset fourth capacity value.

37. The power regulator circuit according to claim 36, wherein the fourth charge-discharge module comprises a fourth capacitor; the capacitance of the fourth capacitor is less than the fourth capacitance value.

38. The power regulation circuit of claim 20, wherein the preset value is determined based on an output power of the power regulation circuit and an output current of the transformer circuit.

39. An electrical energy supply arrangement comprising a power conditioning circuit as claimed in any one of claims 1 to 38.

40. A terminal comprising a power regulating circuit according to any of claims 1-38.

41. A method of power adjustment, the method comprising:

when the input voltage is smaller than a preset value, controlling the output power to be preset output power; and when the input voltage is greater than the preset value, controlling the output power to be a first power higher than the preset output power.

42. A method of power adjustment, the method comprising:

when the input voltage is larger than a preset value, controlling the output power to be preset output power; and when the input voltage is smaller than the preset value, controlling the output power to be a second power lower than the preset output power.

43. A power regulation apparatus, characterized in that the apparatus comprises:

44. A power regulation apparatus, characterized in that the apparatus comprises:

the second conversion module is used for converting the voltage provided by the power supply and then providing an input voltage;

45. An electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein the computer program, when executed by the processor, causes the processor to carry out the method steps as claimed in claim 41 or 42.

46. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method steps of claim 41 or 42.