WO2023024984A1

WO2023024984A1 - Current control circuit, electrical energy supply apparatus and related product

Info

Publication number: WO2023024984A1
Application number: PCT/CN2022/112898
Authority: WO
Inventors: 郭红光; 张晨松; 李建国; 张锦; 纪策; 田晨; 张加亮
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-08-26
Filing date: 2022-08-17
Publication date: 2023-03-02
Also published as: CN115733354A

Abstract

The present application relates to a current control circuit, an electrical energy supply apparatus, and a related product. The current control circuit 01 comprises a conversion module 10 and a control module 20. The conversion module 10 converts an input current and/or an input voltage and then outputs the converted input current and/or input voltage. When the input voltage of the conversion module 10 is less than a reference voltage, the control module 20 controls an output current of the conversion module 10 to be a preset output current; and when the input voltage is greater than the reference voltage, the control module 20 controls the output current of the conversion module 10 to be a first current that is higher than the preset output current. The circuit can achieve an increase in the output current as the input voltage increases, so that the output current correspondingly changes as the input voltage changes.

Description

Current control circuit, power supply device and related products

related application

This application claims the priority of the Chinese patent application filed on August 26, 2021 with the application number 2021109907349 and titled "Current Control Circuit, Power Supply Device and Related Products", which is hereby incorporated by reference in its entirety.

technical field

The present application relates to the technical field of charging, and more specifically, relates to a current control circuit, an electric energy supply device and related products.

Background technique

As terminals are more and more widely used, users have higher and higher requirements for terminal charging. Therefore, many fast charging and flash charging technologies have emerged.

In order to meet the demand for fast charging of the terminal, the charging process of the terminal is often accompanied by the function of "output current limiting". During the charging process, the adapter can be used to control the output current of the charging circuit, so that the output current of the charging circuit can be controlled. at a constant value. For example, it is possible to collect the current at the output terminal of the DC-to-DC (Direct Current-Direct Current, DCDC) circuit, and after processing the current signal, control the pulse width modulation (Pulse width modulation, PWM) of the DCDC circuit according to the processed current signal , so as to stabilize the output current of the DCDC circuit at a constant value.

Contents of the invention

In view of this, the embodiments of the present application provide a current control circuit, a power supply device and related products, which can make the output current change correspondingly with the change of the input voltage.

In the first aspect, the embodiment of the present application provides a current control circuit, including:

Transformation module, used for transforming the input current and/or input voltage and outputting it;

A control module, configured to control the output current of the conversion module to be a preset output current when the input voltage of the conversion module is lower than a reference voltage; and control the output current of the conversion module when the input voltage is greater than the reference voltage The output current is a first current higher than the preset output current.

In a second aspect, the embodiment of the present application provides a current control circuit, including:

A control module, configured to control the output current of the conversion module to be a first current lower than a preset output current when the input voltage of the conversion module is lower than the reference voltage; when the input voltage of the conversion module is greater than the reference voltage voltage, the output current of the conversion module is controlled to be the preset output current.

In a third aspect, an embodiment of the present application provides an electric energy supply device, including the current control circuit provided in any one of the embodiments of the first aspect and the second aspect.

In a fourth aspect, an embodiment of the present application provides an electronic device, including the current control circuit provided in any one of the embodiments of the first aspect and the second aspect.

In a fifth aspect, the embodiment of the present application provides a current control method, the method comprising:

Output after transforming the input current and/or input voltage;

When the input voltage is lower than the reference voltage, control the converted output current to be a preset output current; when the input voltage is greater than the reference voltage, control the converted output current to be higher than the preset output current The first current of current.

In a sixth aspect, the embodiment of the present application provides a current control method, the method comprising:

Output after transforming the input current and/or input voltage;

When the input voltage is lower than the reference voltage, control the transformed output current to be a first current lower than the preset output current; when the input voltage is greater than the reference voltage, control the transformed output current to be the first current. The preset output current described above.

In a seventh aspect, the embodiment of the present application provides a current control device, the device comprising:

A control module, used to control the converted output current to be a preset output current when the input voltage is lower than the reference voltage; and control the converted output current to be higher than the reference voltage when the input voltage is greater than the reference voltage The first current of the preset output current.

In an eighth aspect, the embodiment of the present application provides a current control device, the device comprising:

A control module, configured to control the converted output current to be a first current lower than the preset output current when the input voltage is lower than the reference voltage; The output current is the preset output current.

In the ninth aspect, the embodiment of the present application provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the above-mentioned fifth or sixth aspect. The method steps provided by the embodiments in the aspect.

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

The above current control circuit, power supply device and related products, the current control circuit includes a conversion module and a control module, wherein the conversion module converts the input current and/or input voltage and outputs it, and the input voltage of the control module is lower than the reference voltage When , the output current of the control conversion module is the preset output current; when the input voltage of the conversion module is greater than the reference voltage, the output current of the control conversion module is the first current higher than the preset output current, so that the input of the conversion module When the voltage is lower than the reference voltage, the preset output current is used to maintain a stable current output. When the input voltage of the conversion module is greater than the reference voltage, the output current of the conversion module is controlled to be the first current higher than the preset output current, that is, the conversion module The final output current is increased on the basis of the original stable output current, so that as the input voltage of the conversion module increases, the output current of the conversion module also increases, so that the output current of the conversion module Varies accordingly with changes in input voltage.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present application, and those of ordinary skill in the art can also obtain other drawings according to the disclosed drawings on the premise of not paying creative efforts.

Figure 1a is a schematic diagram of a DCDC converter working state parameter curve in an embodiment;

Fig. 1b is a hardware circuit diagram of output current limiting in an embodiment;

Fig. 1c is a schematic diagram of a DCDC converter working state parameter curve in another embodiment;

Figure 1d is a schematic diagram of a DCDC converter working state parameter curve in another embodiment;

Fig. 1e is a schematic diagram of a DCDC converter working state parameter curve in another embodiment;

Fig. 2 is the structural representation of conversion circuit in an embodiment;

Figure 2a is a schematic diagram of an input voltage waveform of a current conversion circuit in an embodiment;

Figure 2b is a schematic diagram of the relationship between key variables of the DCDC converter in an embodiment;

Fig. 2c is the change curve diagram of the output current of the current conversion circuit in an embodiment;

Fig. 2d is the change curve diagram of the output current of the current conversion circuit in one embodiment;

Fig. 3 is the structural representation of conversion circuit in another embodiment;

Figure 3a is a schematic structural diagram of a conversion circuit in another embodiment;

Figure 3b is a schematic structural diagram of a conversion circuit in another embodiment;

Fig. 4 is the structural representation of conversion circuit in an embodiment;

Fig. 4 a is the change curve diagram of the output current of the current conversion circuit in an embodiment;

Fig. 4b is a change curve diagram of the output current of the current conversion circuit in one embodiment;

FIG. 5 is a schematic structural diagram of a conversion circuit in another embodiment;

Figure 5a is a schematic structural diagram of a conversion circuit in another embodiment;

Figure 5b is a schematic structural diagram of a conversion circuit in another embodiment;

Fig. 6 is a schematic diagram of the internal structure of the power supply device in one embodiment;

Fig. 7 is a schematic diagram of the internal structure of the power supply device in another embodiment;

Fig. 8 is a schematic diagram of the internal structure of an electronic device in an embodiment;

FIG. 9 is a schematic flow chart of a voltage conversion method in an embodiment;

FIG. 10 is a schematic flow chart of a voltage conversion method in another embodiment;

Fig. 11 is a structural block diagram of a voltage conversion device in an embodiment;

Fig. 12 is a structural block diagram of a voltage conversion device in an embodiment;

Explanation of reference signs:

01: Current control circuit; 10: Transformation module;

20: control module; 201: feedforward circuit;

202: Control circuit 2011: Sampling circuit;

2012: switch circuit; 02: current control circuit;

30: transformation module; 40: control module;

401: feedforward circuit; 402: control circuit;

4011: sampling circuit; 4012: switch circuit;

110: input interface; 120: first rectification and filtering module;

130: switching power supply; 140: transformer;

150: second rectification and filtering module; 160: output interface;

210: rectification filter circuit; 220: wireless transmission circuit;

310: charging interface; 320: battery; 330: control module.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first client could be termed a second client, and, similarly, a second client could be termed 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.

In the related art, the DC-to-DC (Direct Current-Direct Current, DCDC) power supply scheme is usually an output voltage regulation mode or an output constant current mode, and the input voltage of the DCDC is usually a stable DC voltage, which makes the DCDC conversion in the related art The applicable scene when the controller is working is very single and not flexible enough. When two items of output voltage, output current, and output resistance are determined, the third item can be calculated by I=U/R. For DCDC products, when the output of DCDC products is constant voltage output (regulated output), the load can be CC (constant current load) or CR (constant resistance load), these two load methods are equivalent in this case of. Similarly, when the output of the DCDC product is a constant current output, the load can be CV (constant voltage load) or CR (constant resistance load), and these two load methods are also equivalent.

Then, for the DCDC converter working at regulated input, regulated output, and connected to CC (CR) load, please refer to Figure 1a for the variation curves of input voltage/current and output voltage/current. According to the schematic diagram of the change curves of input voltage/current and output voltage/current in Figure 1a, it can be obtained that in this case the output voltage/current does not change with the input voltage/current, and both are constant values over time. Usually, for the hardware circuit of output current limiting, as shown in Figure 1b, a sampling resistor Rsns is connected in series on the output path to collect the output current signal, and the signals at both ends of the sampling resistor are respectively connected to the ISP (current sense positive) of the DCDC control chip /ISN (current sense negative), within the DCDC control chip, it is amplified by the current sampling op amp, then through the operational amplifier compensation circuit, and connected to the COMP pin of the DCDC control chip through the diode, so as to control the pulse of the DCDC output current. Duty ratio (Pulse width modulation, PWM), so as to control the magnitude of the output current of the current conversion circuit.

For the case where the DCDC converter works at a regulated input, constant current output, and connected to a CV (CR) load, the variation curves of input voltage/current and output voltage/current are shown in Figure 1c. According to the schematic diagram of the input voltage/current and output voltage/current change curves in Figure 1c, this case is the same as the above (1), and the output voltage/current does not change with the input voltage/current, both are has remained at a constant value over time.

For the case where the DCDC converter works with an unregulated input, a regulated output, and a CC (CR) load, the variation curves of input voltage/current and output voltage/current are shown in Figure 1d. According to the schematic diagram of the change curve of input voltage/current and output voltage/current in Figure 1d, in this case, the output voltage/current does not change with the input voltage/current, and has always been at a fixed value. At the same time, the input current is with the input The voltage changes in reverse.

For the case where the DCDC converter works with unregulated input, constant current output, and connected to a CV (CR) load, the variation curves of input voltage/current and output voltage/current are shown in Figure 1e. According to the schematic diagram of the change curve of input voltage/current and output voltage/current in Figure 1e, in this case, it is the same as the above (3), the output voltage/current does not change with the input voltage/current, and is always at a fixed value. At the same time, the input current varies inversely with the input voltage.

Wherein, in FIG. 1a-FIG. 1e, the horizontal axis represents time t, the left vertical axis represents voltage, and the right vertical axis represents current.

It can be seen from the above four situations that the output voltage or current is not affected by the input voltage, that is, there is no correlation between the output power and the input voltage. This also makes the DCDC converter in the related art unsuitable for some scenarios where the input voltage is unregulated and the output power needs to be adjusted according to the change of the input voltage. For example, taking solar power panels as an example, the weather will cause insufficient power generation of solar power panels, which will suddenly reduce the input voltage of the DCDC converter. At this time, it is necessary to reduce the output power of the DCDC converter to avoid the DCDC converter Some system circuits in the product are damaged. However, in this scenario, because the mode of the DCDC converter in the related art is a regulated output or a constant current output, it is impossible to realize the function of reducing the output power when the input voltage decreases, which makes the related art in this scenario The DCDC converter in it cannot be applied.

Based on this, the DCDC converter in the related art has technical problems such as single applicable scenarios and insufficient flexibility. In view of the above situation, the embodiment of the present application proposes a control method of introducing the input voltage into the control loop, so that the output current changes (for example, changes in positive correlation) with the change of the input voltage.

As shown in Figure 2, in one embodiment, the present application provides a current control circuit 01, the current control circuit 01 includes: a conversion module 10, used to convert the input current and/or input voltage and output it; the control module 20, used to control the output current of the conversion module 10 to be a preset output current when the input voltage of the conversion module is lower than the reference voltage; to control the output current of the conversion module 10 to be higher than the preset output current when the input voltage is greater than the reference voltage the first current.

Among them, the transformation module 10 can realize the transformation of current or voltage, for example, can realize increasing or decreasing current, increasing or decreasing voltage, etc., which can be applied to boost, buck and buck-boost and other types of circuits.

Exemplarily, taking the conversion module 10 as a DCDC converter as an example, the DCDC converter refers to converting a DC power supply of a certain current level into a DC power supply of another current level. For example, the input The direct current is converted into alternating current, and then converted to direct current output after changing the voltage through a transformer, or the alternating current is converted into high-voltage direct current output through a voltage doubler rectifier circuit. The embodiment of the present application does not limit the internal circuit structure of the DCDC converter and the specific conversion process, as long as the input current is converted to a current level to obtain an output current.

Generally, in practical applications, the input voltage of the DCDC converter may increase or decrease in some scenarios. For the case where the input voltage of the DCDC converter becomes larger, if the input voltage of the DCDC converter is higher than the preset voltage value, the output current of the DCDC converter can be adjusted so that the output current of the DCDC converter follows the input voltage. become larger and larger.

In the scenario where the conversion module 10 is a DCDC converter, the control module 20 and the DCDC converter may be integrated, and optionally, the control module 20 may be integrated inside the DCDC converter.

It should be noted that the DCDC converter has a minimum operating voltage. When the input voltage is less than the minimum operating voltage of the DCDC converter, the DCDC converter will stop working, that is, when the input voltage is less than the minimum operating voltage of the DCDC converter, the DCDC converter will stop working. The output current of the tor is 0. Therefore, in the embodiment of the present application, the reference voltage is greater than the minimum operating voltage of the DCDC converter, that is, when the input voltage of the DCDC converter is less than the reference voltage and greater than the minimum operating voltage of the DCDC converter, the control module controls the above-mentioned conversion module to maintain Steady flow output.

As an example, assume that the input voltage ripple of the conversion module 10 is set as a function: The obtained input voltage waveform of the conversion module is shown in Figure 2a, where is the amplitude of the input voltage ripple of the conversion module, and is the input The frequency of the voltage ripple is the input voltage ripple of the conversion module. It should be noted that the actual input voltage ripple of the conversion module is not necessarily the ripple shown in FIG. 2a , and FIG. 2a is only an example.

Exemplarily, the relationship diagram of the DCDC key variables involved in this application: input voltage VIN, input current IIN, and output current IOUT can be shown in FIG. 2b. In this embodiment, the conversion module 10 performs current conversion on the input current IIN to output the current IOUT, and the control module 20 controls the output current IOUT to be the preset output current when the input voltage VIN of the conversion module 10 is less than or equal to the reference voltage value; When the input voltage VIN of the conversion module 10 is greater than the reference voltage, the output current IOUT is controlled to be the first current higher than the preset output current, that is, when the input voltage VIN of the conversion module 10 is lower than the reference voltage value, the conversion module 10 The output current of the conversion module is a fixed current value, that is, maintains a steady current output; when the input voltage VIN of the conversion module 10 is greater than the reference voltage value, the output current of the conversion module is the first current higher than the preset output current, that is, the output current will be Changes with the input voltage of the conversion module.

Optionally, the above-mentioned reference voltage may be a preset fixed voltage value, or may also be a value determined according to a DC component in the input voltage. As an example, the above-mentioned reference voltage may be 3V, of course, the reference voltage may also be other values, for example, 15V, 25V, etc., and this embodiment does not limit the value of the reference voltage here.

In this embodiment, the above-mentioned reference voltage is determined according to the output power of the conversion module and the output current of the preceding stage circuit of the above-mentioned current control circuit. It can be understood that, when determining the reference voltage, two factors, the output power of the transformation module and the output current of the preceding stage circuit of the above-mentioned current control circuit, need to be considered, for example, the output current of the change module is controlled according to the input voltage of the transformation module During the process, the output power of the conversion module needs to be considered. When the input voltage of the conversion module is greater than the reference voltage, the output current of the control module follows the input voltage. When the input voltage of the conversion module is lower than the reference voltage, the control module maintains a constant current output. Then the output power of the conversion module is the minimum when the constant current is output, and the selected reference voltage must meet the condition that the conversion module can reach the minimum output power during the process of the output current following the change of the output voltage. For example, the reference voltage can be converted The voltage corresponding to the minimum output power of the module. In addition, the current that the front-stage circuit of the current control circuit can withstand is also limited, so the output voltage of the front-stage circuit of the current control circuit will also have a certain limit. The output voltage of the front-stage circuit is used as the input voltage of the conversion module. In order to ensure that the output current of the conversion module follows the input voltage, it is necessary to consider the output voltage of the previous stage circuit. For example, the selected reference voltage should be within the range of the output voltage of the previous stage circuit.

Optionally, the above-mentioned preset output current may be 2A, 3A and so on. Exemplarily, taking the input voltage VIN as 9V, the reference voltage as 5V, and the preset output current as 2A as an example, in this scenario, the input voltage VIN is greater than the reference voltage, and the control module 20 controls the output of the conversion module 10 The current is a first current higher than the preset output current 2A. Or, taking the above-mentioned input voltage VIN as 5V, the reference voltage as 9V, and the preset output current as 2A as an example, in this scenario, the above-mentioned input voltage is lower than the reference voltage, and the control module controls the output current of the above-mentioned conversion module to maintain the preset Output current 2A, steady current output.

The following takes the reference voltage of 15V and the conversion module connected to two different loads as an example to illustrate:

First, when the conversion module 10 is connected to a constant voltage (CV) load, when the input voltage VIN of the conversion module 10 is greater than 15V, the output current IOUT changes with the input voltage VIN, and when the input voltage VIN of the conversion module 10 is less than 15V , the output current IOUT maintains a constant current output. In this scenario, the change curve of the output current IOUT of the conversion module 10 is shown in FIG. 2c. It can be understood that when the input voltage VIN of the conversion module 10 is equal to 15V, it is a critical situation, and the input voltage VIN of the conversion module 10 is equal to 15V and can be divided into scenarios where the input voltage VIN of the conversion module 10 is greater than 15V, that is, , when the input voltage of the conversion module is equal to the reference voltage, the output current of the conversion module is the first current. Alternatively, it is also possible to divide the input voltage VIN of the conversion module 10 equal to 15V into scenarios where the input voltage VIN of the conversion module 10 is less than 15V, that is, when the input voltage of the conversion module is equal to the reference voltage, the output current of the conversion module is the predetermined Set the output current.

Second, when the conversion module is connected to a constant resistance (CR) load, when the input voltage VIN of the conversion module 10 is greater than 15V, the output current IOUT follows the input voltage VIN and changes, and when the input voltage VIN of the conversion module 10 is less than 15V, The output current IOUT maintains a constant current output. In this scenario, the variation curve of the output current IOUT of the current conversion circuit 10 is shown in FIG. 2d. It can be understood that when the input voltage VIN of the conversion module 10 is equal to 15V, it is a critical situation, and the input voltage VIN of the conversion module 10 is equal to 15V and can be divided into scenarios where the input voltage VIN of the conversion module 10 is greater than 15V, that is, , when the input voltage of the conversion module is equal to the reference voltage, the output current of the conversion module is the first current. Alternatively, it is also possible to divide the input voltage VIN of the conversion module 10 equal to 15V into scenarios where the input voltage VIN of the conversion module 10 is less than 15V, that is, when the input voltage of the conversion module is equal to the reference voltage, the output current of the conversion module is the preset Set the output current.

In this embodiment, the current control circuit includes a conversion module and a control module, wherein the conversion module converts the input current and/or input voltage and outputs it, and the control module controls the output of the conversion module when the input voltage of the conversion module is lower than the reference voltage The current is the preset output current; when the input voltage of the conversion module is greater than the reference voltage, the output current of the conversion module is controlled to be the first current higher than the preset output current, so that when the input voltage of the conversion module is lower than the reference voltage, the The preset output current maintains a stable current output. When the input voltage of the conversion module is greater than the reference voltage, the output current of the conversion module will be controlled to be the first current higher than the preset output current, that is, the final output current of the conversion module is at the original On the basis of the stable output current, the output current of the conversion module also increases with the increase of the input voltage of the conversion module, so that the output current of the conversion module increases with the change of the input voltage. Change accordingly.

When the input voltage VIN of the conversion module 10 is greater than the reference voltage, the control module 20 controls the output current of the conversion module to be the first current higher than the preset output current, on the basis of the above embodiments, in an embodiment Among them, the above-mentioned first current is obtained by adjusting the frequency of the control signal of the transformation module 10, or the above-mentioned 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 VIN of the conversion module 10 is greater than the reference voltage, the control module 20 needs to control the output current of the conversion module to be the first current, and the first current is a current higher than the preset output current, which can be By adjusting the frequency of the control signal of the conversion module 10, the output current of the conversion module 10 is the first current higher than the preset output current. Alternatively, the frequency of the control signal corresponding to the preset output current can be adjusted so that the output current of the transformation module 10 is a first current higher than the preset output current.

In this embodiment, the first current output by the conversion module is obtained by adjusting the frequency of the control signal of the conversion module, or by adjusting the frequency of the control signal corresponding to the preset output current. In this way, by adjusting the frequency of the control signal of the conversion module By adjusting the frequency or adjusting the frequency of the control signal corresponding to the preset output current, the first current can be flexibly adjusted, so that the output current of the conversion module can meet a wider range of application scenarios.

When the input voltage VIN of the conversion module 10 is greater than the reference voltage, the control module 20 controls the output current of the conversion module to be the first current higher than the preset output current, on the basis of the above embodiments, in an embodiment Among them, the above-mentioned first current is obtained by increasing the pulse duty ratio of the control signal of the conversion module 10 .

In this embodiment, when the input voltage VIN of the conversion module 10 is greater than the reference voltage, the control module 20 needs to control the output current of the conversion module 10 to be the first current, and the first current is a current higher than the preset output current, The magnitude of the output current of the conversion module 10 can be controlled by controlling the pulse duty cycle of the control signal of the conversion module. Therefore, to make the output current of the conversion module 10 the above-mentioned first current, it is necessary to increase the control signal of the conversion module 10 The pulse duty ratio is set so that the output current of the conversion module 10 is a first current higher than the preset output current.

In this embodiment, the first current output by the conversion module is obtained by increasing the pulse duty ratio of the control signal of the conversion module, so that the first current can be flexibly adjusted by adjusting the pulse duty ratio of the control signal of the conversion module. Ground adjustment, so that the output current of the conversion module can meet a wider range of application scenarios.

Further, in one embodiment, the above-mentioned control module 20 is configured to generate the first voltage according to the input voltage of the conversion module 10 and the above-mentioned reference voltage, and calculate the first voltage and the preset control voltage to obtain the second voltage; It is assumed that the control voltage is used to control the output current of the conversion module to be a preset output current; the conversion module 10 is used to increase the pulse duty cycle of the control signal of the conversion module 10 according to the second voltage to output the first current.

Wherein, the controlled object in this application is the output current IOUT of the conversion module 10, and the controlled input is the input voltage VIN of the conversion module 10. The corresponding relationship between the two can be realized through corresponding hardware circuits, that is, the The output current IOUT can be regulated by the voltage value generated by the control module 20 . Optionally, in this embodiment, the control module 20 may perform calculations on the input voltage of the conversion module 10 and the above-mentioned reference voltage, and increase the signal obtained by the calculation to obtain the first voltage, and calculate the generated first voltage and The preset control voltage is calculated to obtain the second voltage; wherein, the preset control voltage is used to control the output current of the transformation module 10 to be the preset output current. For example, the difference between the input voltage of the conversion module 10 and the above-mentioned reference voltage can be calculated, and then the difference can be amplified according to a preset scaling factor to obtain the first voltage, and then the difference between the first voltage and the preset control voltage can be further performed operation to obtain the second voltage.

Optionally, in this embodiment, the control module 20 may include a differential amplifier, through which the differential operation can be performed on the input voltage VIN and the reference voltage of the transformation module 10, and the obtained differential signal can be amplified through the differential amplifier. The first voltage is obtained after being increased, and then a differential amplifier is used to perform a differential operation on the obtained first voltage and the above-mentioned preset control voltage to obtain a second voltage, which is fed back to the COMP pin of the conversion module to convert The module increases the duty ratio of the control signal of the conversion module according to the second voltage on the COMP pin, so as to output the first current.

In this embodiment, the control module can generate the first voltage according to the input voltage and the reference voltage of the conversion module, so that the first voltage and the preset control voltage used to control the output current of the conversion module to a preset output current can be calculated, Obtain the second voltage, and then the conversion module can increase the pulse duty ratio of the control signal of the conversion module according to the second voltage, so as to output the first current higher than the preset output current, that is to say, the conversion module can The voltage value can flexibly adjust the output current of the conversion module, so that the output current of the conversion module can change with the change of the input voltage, so that the output current of the conversion module can meet a wider range of application scenarios.

In the scenario where the control module 20 generates the first voltage according to the input voltage and the reference voltage, and calculates the first voltage and the preset control voltage to obtain the second voltage, on the basis of the above embodiments, in one embodiment, As shown in FIG. 3 , the above-mentioned control module 20 includes a feedforward circuit 201 and a control circuit 202; the feedforward circuit 202 is used to cut off the output voltage to the control circuit 202 when the input voltage of the above-mentioned conversion module 10 is lower than the above-mentioned reference voltage; When the input voltage of the conversion module 10 is greater than the reference voltage, output the first voltage to the control circuit 202 according to the input voltage of the conversion module 10 and the reference voltage; When the reference voltage is used, the output current of the conversion module 10 is controlled to be the preset output current according to the preset control voltage; when the input voltage of the conversion module 10 is greater than the reference voltage, the conversion module is controlled according to the preset control voltage and the first voltage 10 outputting the above-mentioned first current.

In this embodiment, when the input voltage of the conversion module 10 is lower than the reference voltage, the control module 20 will control the output current of the conversion module 10 to the preset output current according to the preset output current, and perform constant current output. The output current of the module 10 is adjusted, the feedforward circuit 201 included in the control module 20 will cut off the output voltage to the above-mentioned control circuit 202, and the conversion module 10 outputs with the above-mentioned preset output current constant current, for example, the input voltage of the above-mentioned conversion module 10 is When the reference voltage is 2V and the reference voltage is 5V, the input voltage of the conversion module 10 is lower than the reference voltage. At this time, the feedforward circuit 201 cuts off the output current to the control circuit 202, and the conversion module 10 outputs a preset output current at a constant current.

When the input voltage of the conversion module 10 is greater than the above-mentioned reference voltage, the control module 20 needs to control the output current of the conversion module 10 to be the first current higher than the preset output current. In this embodiment, the feedforward circuit included in the control module 20 201 can output the first voltage to the control circuit according to the input voltage of the transformation module 10 and the above-mentioned reference voltage, so that the control circuit 202 included in the control module 20 can control the transformation module 10 to output the above-mentioned first voltage according to the first voltage and the preset control voltage. current. Exemplarily, taking the input voltage of the conversion module 10 as 9V and the reference voltage as 5V as an example, at this time, the input voltage of the conversion module 10 is greater than the reference voltage, and the feedforward circuit 201 will The voltage outputs a first voltage to the control circuit 202, and the control circuit 202 controls the conversion module 10 to output the above-mentioned first current according to the preset control voltage and the first voltage.

Optionally, in this embodiment, the above-mentioned feedforward circuit 201 may perform a differential operation on the above-mentioned input voltage and the reference voltage, and obtain the above-mentioned first voltage after increasing the obtained differential signal. For example, a preset A certain scale factor increases the differential information. Alternatively, in some scenarios, the obtained differential signal may also be reduced according to a scaling factor to obtain the first voltage, which is not limited in this embodiment of the present application. Optionally, the above-mentioned control circuit 202 may perform a differential operation on the first voltage obtained by the feedforward circuit 201 and the preset control voltage to obtain a second voltage, so that the conversion module 10 increases the control of the conversion module 10 according to the second voltage. The pulse duty cycle of the signal to output the above-mentioned first current.

In this embodiment, the feedforward circuit can cut off the output voltage to the control circuit when the input voltage of the conversion module is lower than the reference voltage, and the control circuit can control the output current of the conversion module to be the preset output current according to the preset control voltage; in the conversion module When the input voltage is greater than the reference voltage, the feedforward circuit can output the first voltage to the control circuit according to the input voltage of the conversion module and the reference voltage, so that the control circuit can control the conversion module to output the first voltage according to the preset control voltage and the first voltage. current, so that when the input voltage of the conversion module is lower than the reference voltage, the preset output current maintains a stable current output, and when the input voltage of the conversion module is greater than the reference voltage, the output current of the conversion module is controlled to be higher than the preset output current The first current of the conversion module, that is, the final output current of the conversion module is increased on the basis of the original stable output current, so that as the input voltage of the conversion module increases, the output current of the conversion module also increases. Large, so that the output current of the conversion module changes correspondingly with the change of the input voltage.

On the basis of the above-mentioned embodiment, in one embodiment, please continue to refer to FIG. 3, the above-mentioned feedforward circuit 201 includes a sampling circuit 2011 and a switch circuit 2012; the sampling circuit 2011 converts the input voltage of the above-mentioned conversion module 10 and the above-mentioned reference voltage For comparison, when the input voltage of the conversion module 10 is less than the reference voltage, the control switch circuit 2012 disconnects the path between the sampling circuit and the control circuit 202; when the input voltage of the conversion module 10 is greater than the reference voltage, the control switch circuit 2012 turns on The path between the sampling circuit 2011 and the control circuit 202 is connected, and the above-mentioned first voltage is output to the control circuit 202 .

Exemplarily, in this embodiment, taking the input voltage of the conversion module 10 as 7V and the reference voltage as 5V as an example, the sampling circuit 2011 included in the feedforward circuit 201 compares the input voltage of the conversion module 10 with the reference voltage By comparison, if the input voltage of the conversion module 10 is greater than the reference voltage, the sampling circuit 2011 will control the switch circuit 2012 to conduct the path between the sampling circuit 2011 and the control circuit 202, and output the first voltage to the control circuit 202, so that The control circuit 202 controls the output current of the transformation module to be a first current higher than the preset output current according to the first voltage and the preset control voltage. For another example, taking the above-mentioned conversion module 10 with an input voltage of 4V and a reference voltage of 5V as an example, the sampling circuit 2011 compares the input voltage of the conversion module 10 with the reference voltage, and obtains that the input voltage of the conversion module 10 is lower than the reference voltage, Then the sampling circuit 2011 controls the switch circuit 2012 to disconnect the path between the sampling circuit 2011 and the control circuit 202, so that the control circuit 202 controls the constant current output of the conversion module according to the preset control voltage.

Optionally, as shown in FIG. 3a, in this embodiment, the sampling circuit 2011 includes an operational amplifier, the non-inverting input terminal of the operational amplifier is connected to the input terminal of the conversion module 10, and the inverting input terminal of the operational amplifier is used for To input the reference voltage, the output terminal of the operational amplifier is connected to the switch circuit 2012. Optionally, the sampling circuit 2011 can compare the input voltage of the conversion module 10 with the reference voltage through the operational amplifier.

Optionally, please continue to refer to FIG. 3a. In this embodiment, the switch circuit 2012 includes a diode, the anode of the diode is connected to the output terminal of the operational amplifier, and the cathode of the diode is connected to the input terminal of the control circuit 202. The diode can disconnect the path between the sampling circuit 2011 and the control circuit 202 when the input voltage of the conversion module 10 is lower than the reference voltage, and turn on the sampling circuit 2011 when the input voltage of the conversion module 10 is greater than the reference voltage and the path between the control circuit 202 and output the first voltage to the control circuit 202 . Optionally, the switch circuit 2012 may also include a switch circuit based on the COMP pin, or may also include a switch circuit based on the FB pin, which is not limited in this embodiment.

Exemplarily, as shown in FIG. 3b, assuming that the reference voltage Vref is 15V, when the sampling circuit 2011 judges that the input voltage Vin is less than or equal to 15V, the anode voltage of the diode in the switch circuit 2012 is lower than the cathode voltage, and the diode is not turned on. Then the output of the operational amplifier in the control circuit 202 depends on Iref, that is, the magnitude of the input voltage at this time will not affect the output current of the DCDC, and the output current of the DCDC is still a constant current output. When the sampling circuit 2011 judges that the input voltage Vin is greater than 15V, the anode voltage of the diode in the switch circuit 2012 is greater than the cathode voltage, and the diode is turned on, which is equivalent to increasing the positive voltage of the operational amplifier in the control circuit 202 on the basis of Iref. The input current to the input terminal will also increase the output current of the operational amplifier in the control circuit 202, so that the input current of the COMP terminal of the DCDC increases, and the PWM output current of the DCDC increases, and the output current of the DCDC also increases.

In this embodiment, the sampling circuit included in the voltage feedforward circuit can compare the input voltage of the conversion module with the reference voltage, and obtain the comparison result accurately, and then can accurately control the switching circuit when the input voltage of the conversion module is lower than the reference voltage Disconnect the path between the sampling circuit and the control circuit; when the input voltage of the conversion module is greater than the reference voltage, accurately control the switch circuit to conduct the path between the sampling circuit and the control circuit, and accurately output the first voltage to the control circuit The accuracy of the control switch circuit controlling the path between the sampling circuit and the control circuit is improved.

In the above-mentioned embodiments of FIG. 3 to FIG. 3b, the function of the control module is realized by using an analog circuit. In one embodiment, the function of the control module can also be realized by a digital circuit. The above-mentioned control module 20 is used to generate a first signal according to the input voltage of the transformation module 10 and the above-mentioned reference voltage, and calculate the first signal and the preset control signal to obtain a second signal; the preset control signal is used to control the transformation module The output current is a preset output current; the conversion module 10 is configured to increase the pulse duty ratio of the control signal of the conversion module 10 according to the second signal, so as to output the first current.

In this embodiment, a digital circuit can be used to realize the function of the control module, for example, a chip with data operation function is used to perform the function of the above-mentioned control module, and the input voltage of the conversion module 10 and the above-mentioned reference voltage are input into the chip After calculation, the second signal is output, and the second signal is fed back to the transformation module, so that the transformation module increases the duty ratio of the control signal of the control module according to the second signal.

In this embodiment, the first signal can be generated by the data circuit according to the input voltage and the reference voltage of the conversion module, and the first signal and the preset control signal are calculated to obtain the second signal, and then the conversion module can increase the Transforming the pulse duty ratio of the control signal of the module to output the first current higher than the preset output current, and adopting the digital circuit to realize the function of the control module makes the circuit structure of the current control circuit simpler.

As shown in FIG. 4, in one embodiment, the present application provides a current control circuit 02, the current control circuit 02 includes: a transformation module 30, used to transform the input current and/or input voltage and output it; the control module 40, used to control the output current of the conversion module 30 to be the first current lower than the preset output current when the input voltage of the conversion module 10 is lower than the reference voltage; when the input voltage of the conversion module 10 is greater than the reference voltage, control the conversion module The output current of 30 is the preset output current.

Among them, the transformation module 30 can realize the transformation of current or voltage, for example, can realize the increase or decrease of current, increase or decrease of voltage, etc., which can be applied in boost, buck and buck-boost and other types of circuits.

Exemplarily, taking the conversion module 30 as a DCDC converter as an example, the DCDC converter means converting a DC power supply of a certain current level into a DC power supply of another current level. For example, the input The direct current is converted into alternating current, and then converted to direct current output after changing the voltage through a transformer, or the alternating current is converted into high-voltage direct current output through a voltage doubler rectifier circuit. The embodiment of the present application does not limit the internal circuit structure of the DCDC converter and the specific conversion process, as long as the input current is converted to a current level to obtain an output current.

In the scenario where the conversion module 30 is a DCDC converter, the control module 40 can be integrated with the DCDC converter. Optionally, the control module 40 can be integrated inside the DCDC converter, so that the overall circuit structure of the current control circuit is more compact. Simpler and more integrated.

It should be noted that the DCDC converter has a minimum operating voltage. When the input voltage is less than the minimum operating voltage of the DCDC converter, the DCDC converter will stop working, that is, when the input voltage is less than the minimum operating voltage of the DCDC converter, the DCDC converter will stop working. The output current of the tor is 0. Therefore, in the embodiment of the present application, the reference voltage is greater than the minimum operating voltage of the DCDC converter, that is, when the input voltage of the DCDC converter is less than or equal to the reference voltage and greater than the minimum operating voltage of the DCDC converter, the control module controls the above conversion The module maintains a steady current output.

Exemplarily, assume that the input voltage ripple of the conversion module 30 is set as a function: , please continue to refer to FIG. 2a for the obtained input voltage waveform of the conversion module, where is the amplitude of the input voltage ripple of the conversion module, and is the input The frequency of the voltage ripple is the input voltage ripple of the conversion module. It should be noted that the actual input voltage ripple of the conversion module is not necessarily the ripple shown in FIG. 2a , and FIG. 2a is only an example.

Exemplarily, the relationship diagram of the DCDC key variables involved in this application: the input voltage VIN, the input current IIN, and the output current IOUT can continue to refer to FIG. 2b. In this embodiment, the conversion module 30 performs current conversion on the input current IIN and then outputs the current IOUT. When the input voltage VIN of the conversion module 30 is lower than the reference voltage, the control module 40 controls the output current IOUT of the conversion module 30 to be lower than the preset output The first current of the current; when the input voltage VIN of the conversion module 30 is greater than the reference voltage, the output current IOUT of the control conversion module 30 is the above-mentioned preset output current, that is, the input voltage VIN of the conversion module 30 is lower than the above-mentioned reference voltage value, the output current of the conversion module 30 is the first current lower than the preset output current, that is, the output current will change with the input voltage of the current conversion circuit 30; when the input voltage VIN of the conversion module 30 is greater than the reference voltage, the conversion The output current of the module 30 is a fixed current value, that is, a steady current output is maintained. It should be noted that, when the input voltage of the conversion module 30 is lower than the reference voltage, and the control module 40 controls the output current of the conversion module 30 to be the first current lower than the preset output current, the input voltage of the conversion module 30 should be greater than The working voltage, that is, the control module 40 controls the output current of the converting module 30 to be a first current lower than the preset output current when the input voltage of the converting module 30 is lower than the reference voltage and higher than the working voltage.

Optionally, the above-mentioned reference voltage may be a preset fixed voltage value, or may also be a value determined according to a DC component in the input voltage. As an example, the above-mentioned reference voltage may be 10V, of course, the reference voltage may also be other values, for example, 15V, 25V, etc., and this embodiment does not limit the value of the reference voltage here.

In this embodiment, the above-mentioned reference voltage is determined according to the output power of the conversion module and the output current of the preceding stage circuit of the above-mentioned current control circuit. It can be understood that, when determining the reference voltage, two factors, the output power of the transformation module and the output current of the preceding stage circuit of the above-mentioned current control circuit, need to be considered, for example, the output current of the change module is controlled according to the input voltage of the transformation module During the process, the output power of the conversion module needs to be considered. When the input voltage of the conversion module is lower than the reference voltage, the output current of the control module is the first current lower than the preset output current, that is, the output current of the control module follows the conversion The input voltage of the module, when the input voltage of the changing module is greater than the reference voltage, the control module maintains a constant current output, then the output power of the conversion module is the largest when the constant current is output, and the selected reference voltage must satisfy the change of the output current following the output voltage. During the change process, the conversion module can reach the condition of maximum output power, for example, the reference voltage can be a voltage corresponding to the maximum output power of the conversion module. In addition, the current that the front-stage circuit of the current control circuit can withstand is also limited, so the output voltage of the front-stage circuit of the current control circuit will also have a certain limit. The output voltage of the front-stage circuit is used as the input voltage of the conversion module. In order to ensure that the output current of the conversion module follows the input voltage, it is necessary to consider the output voltage of the previous stage circuit. For example, the selected reference voltage should be within the range of the output voltage of the previous stage circuit.

Optionally, the above-mentioned preset output current may be 2A, 3A and so on. Exemplarily, taking the input voltage VIN as 9V, the reference voltage as 6V, and the preset output current as 2A as an example, in this scenario, the input voltage VIN is greater than the reference voltage, and the control module 40 controls the output of the conversion module 30 The current is maintained at the preset output current of 2A, and the output is steady. Alternatively, taking the input voltage VIN as 5V, the reference voltage as 9V, and the preset output current as 2A as an example, in this scenario, the input voltage of the conversion circuit 30 is lower than the reference voltage, and the control module 40 controls the conversion module 30 to The output current is a first current lower than the preset output current.

The following takes the reference voltage of 25V and the conversion module connected to two different loads as an example to illustrate:

First, when the conversion module 30 is connected to a constant voltage (CV) load, when the input voltage VIN of the conversion module 30 is less than 25V, the output current IOUT changes with the input voltage VIN, and when the input voltage VIN of the conversion module 30 is greater than 25V , the output current IOUT maintains a constant current output. In this scenario, the change curve of the output current IOUT of the conversion module 30 is shown in FIG. 4a. It can be understood that when the input voltage VIN of the conversion module 10 is equal to 25V, it is a critical situation, and the input voltage VIN of the conversion module 10 equal to 25V can be divided into scenarios where the input voltage VIN of the conversion module 10 is greater than 25V, that is, , when the input voltage of the conversion module is equal to the reference voltage, the output current of the conversion module is a preset output current. Alternatively, it is also possible to divide the input voltage VIN of the conversion module 10 equal to 25V into scenarios where the input voltage VIN of the conversion module 10 is less than 25V, that is, when the input voltage of the conversion module is equal to the reference voltage, the output current of the conversion module is the first a current.

In the second type, when the conversion module is connected to a constant resistance (CR) load, when the input voltage VIN of the conversion module 30 is less than 25V, the output current IOUT changes with the input voltage VIN, and when the input voltage VIN of the conversion module 30 is greater than 25V, The output current IOUT maintains a constant current output. In this scenario, the change curve of the output current IOUT of the conversion module 30 is shown in FIG. 4b. It can be understood that when the input voltage VIN of the conversion module 10 is equal to 25V, it is a critical situation, and the input voltage VIN of the conversion module 10 equal to 25V can be divided into scenarios where the input voltage VIN of the conversion module 10 is greater than 25V, that is, , when the input voltage of the conversion module is equal to the reference voltage, the output current of the conversion module is a preset output current. Alternatively, it is also possible to divide the input voltage VIN of the conversion module 10 equal to 25V into scenarios where the input voltage VIN of the conversion module 10 is less than 25V, that is, when the input voltage of the conversion module is equal to the reference voltage, the output current of the conversion module is the first a current.

In this embodiment, the current control circuit includes a conversion module and a control module, wherein the conversion module converts the input current and/or input voltage and outputs it, and the control module controls the output of the conversion module when the input voltage of the conversion module is lower than the reference voltage The current is the first current lower than the preset output current; when the input voltage of the conversion module is greater than the reference voltage, the output current of the conversion module is controlled to be the preset output current, so that when the input voltage of the conversion module is greater than the reference voltage, the The output current of the control conversion module is the preset output current. When the input voltage of the conversion module is lower than the reference voltage, the output current of the conversion module is controlled to be the first current higher than the preset output current, that is, the final output current of the conversion module is Increased on the basis of the original stable output current, so that as the input voltage of the conversion module increases, the output current of the conversion module also increases, so that the output current of the conversion module increases with the input voltage change accordingly.

When the input voltage VIN of the conversion module 30 is lower than the reference voltage, the control module 40 controls the output current of the conversion module 30 to be the first current lower than the preset output current, on the basis of the above embodiment, in an implementation In an example, the above-mentioned first current is obtained by adjusting the frequency of the control signal of the conversion module 30 , or the above-mentioned 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 VIN of the conversion module 30 is lower than the reference voltage, the control module 40 needs to control the output current of the conversion module 30 to be the first current, and the first current is a current lower than the preset output current, The frequency of the control signal of the conversion module 30 can be adjusted so that the output current of the conversion module 30 is the first current lower than the preset output current. Alternatively, the frequency of the control signal corresponding to the preset output current can be adjusted so that the output current of the transformation module 30 is the first current lower than the above-mentioned preset output current. In this way, by adjusting the frequency of the control signal of the transformation module or adjusting the preset By setting the frequency of the control signal corresponding to the output current, the first current can be flexibly adjusted, so that the output current of the conversion module can meet wider application scenarios.

When the input voltage VIN of the conversion module 30 is lower than the reference voltage, the control module 40 controls the output current of the conversion module to be the first current lower than the preset output current, on the basis of the above embodiments, in an embodiment Among them, the above-mentioned first current is obtained by reducing the pulse duty ratio of the control signal of the conversion module 30 .

In this embodiment, when the input voltage VIN of the conversion module 30 is lower than the reference voltage, the control module 40 needs to control the output current of the conversion module 30 to be the first current, and the first current is a current lower than the preset output current, The magnitude of the output current of the conversion module 30 can be controlled by controlling the pulse duty cycle of the control signal of the conversion module. Therefore, to make the output current of the conversion module 30 the above-mentioned first current, it is necessary to reduce the control signal of the conversion module 30 The pulse duty ratio is set so that the output current of the conversion module 30 is a first current lower than the preset output current.

In this embodiment, the first current output by the conversion module is obtained by reducing the pulse duty ratio of the control signal of the conversion module, so that the first current can be flexibly adjusted by adjusting the pulse duty ratio of the control signal of the conversion module. Ground adjustment, so that the output current of the conversion module can meet a wider range of application scenarios.

Further, in one embodiment, the above-mentioned control module 40 is configured to generate the first voltage according to the input voltage of the transformation module 30 and the above-mentioned reference voltage, and the first voltage and the output current used to control the transformation module are preset output currents The preset control voltage is calculated to obtain a second voltage; the conversion module 30 is configured to reduce the pulse duty cycle of the control signal of the conversion module 30 according to the second voltage, so as to output the first current.

Wherein, the controlled object in this application is the output current IOUT of the transformation module 30, and the controlled input is the input voltage VIN of the transformation module 30. The corresponding relationship between the two can be realized through corresponding hardware circuits, that is, the The output current IOUT can be regulated by the voltage value generated by the control module 40 . Optionally, in this embodiment, the control module 40 may perform calculations on the input voltage of the conversion module 30 and the above-mentioned reference voltage, and increase the signal obtained by the calculation to obtain the first voltage, and calculate the generated first voltage and The preset control voltage is calculated to obtain the second voltage; wherein, the preset control voltage is used to control the output current of the transformation module 10 to be the preset output current. For example, the difference between the input voltage of the conversion module 30 and the above-mentioned reference voltage can be calculated, and then the difference can be amplified according to a preset scaling factor to obtain the first voltage, and then the first voltage can be further differentiated from the preset control voltage operation to obtain the second voltage.

Optionally, in this embodiment, the control module 30 may include a differential amplifier, through which the differential operation can be performed on the input voltage VIN and the reference voltage of the conversion module 30, and the obtained differential signal can be amplified through the differential amplifier. The first voltage is obtained after being increased, and then a differential amplifier is used to perform a differential operation on the obtained first voltage and the above-mentioned preset control voltage to obtain a second voltage, which is fed back to the COMP pin of the conversion module to convert The module increases the duty ratio of the control signal of the conversion module according to the second voltage on the COMP pin, so as to output the first current.

In this embodiment, the control module can generate the first voltage according to the input voltage and the reference voltage of the conversion module, so that the first voltage and the preset control voltage used to control the output current of the conversion module to a preset output current can be calculated, The second voltage is obtained, and then the conversion module can reduce the pulse duty cycle of the control signal of the conversion module according to the second voltage, so as to output the first current lower than the preset output current, that is to say, the conversion module can The voltage value can flexibly adjust the output current of the conversion module, so that the output current of the conversion module can change with the change of the input voltage, so that the output current of the conversion module can meet a wider range of application scenarios.

In the scenario where the control module 40 generates the first voltage according to the input voltage and the reference voltage, and calculates the first voltage and the preset control voltage to obtain the second voltage, on the basis of the above embodiments, in one embodiment, As shown in FIG. 5 , the above-mentioned control module 40 includes a feedforward circuit 401 and a control circuit 402; and the reference voltage output the above-mentioned first voltage to the control circuit 402; when the input voltage of the above-mentioned conversion module 30 is greater than the above-mentioned reference voltage, the output voltage to the control circuit 402 is cut off; the control circuit 402 is used for the input voltage of the conversion module 30. When the reference voltage is used, the conversion module 30 is controlled to output the first current according to the preset control voltage and the first voltage; when the input voltage of the conversion module 30 is greater than the reference voltage, the output current of the conversion module is controlled according to the preset control voltage to be preset output current.

In this embodiment, when the input voltage of the conversion module 30 is lower than the reference voltage, the control module 40 needs to control the output current of the conversion module 30 to be the first current lower than the preset output current. In this embodiment, the control module The feedforward circuit 401 included in 40 can output the first voltage to the control circuit according to the input voltage of the conversion module 30 and the above-mentioned reference voltage, so that the control circuit 402 included in the control module 40 can control the conversion according to the first voltage and the preset control voltage The module 30 outputs the above-mentioned first current. Exemplarily, taking the input voltage of the transformation module 30 as 3V and the reference voltage as 5V as an example, at this time, the input voltage of the transformation module 30 is lower than the reference voltage, and the feedforward circuit 401 will The voltage outputs the first voltage to the control circuit 402, and the control circuit 402 controls the transformation module circuit 30 to output the above-mentioned first current according to the preset control voltage and the first voltage.

Optionally, in this embodiment, the above-mentioned feedforward circuit 401 may perform a differential operation on the above-mentioned input voltage and the reference voltage, and obtain the above-mentioned first voltage after increasing the obtained differential signal. For example, a preset A certain scale factor increases the differential information. Alternatively, in some scenarios, the obtained differential signal may also be reduced according to a scaling factor to obtain the first voltage, which is not limited in this embodiment of the present application. Optionally, the above-mentioned control circuit 402 may perform a differential operation on the first voltage obtained by the feed-forward circuit 401 and the above-mentioned preset control voltage to obtain a second voltage, so that the transformation module 30 reduces the voltage of the transformation module 30 according to the second voltage. The pulse duty ratio of the control signal is used to output the above-mentioned first current.

When the input voltage of the conversion module 30 is greater than the reference voltage, the control module 40 will control the output current of the conversion module 30 to the preset output current according to the preset output current, and perform constant current output. Adjustment, the feedforward circuit 401 included in the control module 40 will cut off the output voltage to the control circuit 402, and the conversion module 30 will output the constant current with the preset output current. For example, the input voltage of the conversion module 30 is 15V, and the reference voltage is 10V. , the input voltage of the conversion module 30 is greater than the reference voltage, at this time, the feedforward circuit 401 cuts off the output current to the control circuit 402, and the conversion module 30 outputs a constant current with a preset output current.

In this embodiment, the feedforward circuit included in the control module can cut off the output current to the control circuit when the input voltage of the conversion module is greater than the reference voltage, and the control circuit can control the output current of the conversion module to the preset output current according to the preset control voltage ; When the input voltage of the conversion module is less than the reference voltage, the feedforward circuit can output the first voltage to the control circuit according to the input voltage of the conversion module and the reference voltage, so that the control circuit can control the conversion according to the preset control voltage and the first voltage The module outputs the first current, so that when the input voltage of the conversion module is greater than the reference voltage, the preset output current maintains a stable current output, and when the input voltage of the conversion module is lower than the reference voltage, the output current of the conversion module is controlled to be lower than The first current of the preset output current, that is, the final output current of the conversion module is reduced on the basis of the original stable output current, so that as the input voltage of the conversion module decreases, the output current of the conversion module It also decreases accordingly, so that the output current of the conversion module changes correspondingly with the change of the input voltage.

On the basis of the above-mentioned embodiment, in one embodiment, please continue to refer to FIG. 5, the above-mentioned feedforward circuit 401 includes a sampling circuit 4011 and a switch circuit 4012; the sampling circuit 4011 converts the input voltage of the above-mentioned conversion module 30 and the above-mentioned reference voltage For comparison, when the input voltage of the conversion module 30 is lower than the reference voltage, the control switch circuit 4012 turns on the path between the sampling circuit 4011 and the above-mentioned control circuit 402, and outputs the first voltage to the control circuit 402; When the input voltage is greater than the reference voltage, the control switch circuit 4012 disconnects the path between the sampling circuit 4011 and the control circuit 402 .

Exemplarily, in this embodiment, taking the input voltage of the conversion module 30 as 5V and the reference voltage as 10V as an example, the sampling circuit 4011 included in the feedforward circuit 401 compares the input voltage of the conversion module 10 with the reference voltage, Obtaining that the input voltage of the conversion module 30 is lower than the reference voltage, the sampling circuit 4011 will control the switch circuit 4012 to conduct the path between the sampling circuit 4011 and the control circuit 402, and output the first voltage to the control circuit 202, so that the control circuit 202 Control the output current of the conversion module 30 to be a first current lower than the preset output current according to the first voltage and the preset control voltage. For another example, taking the above-mentioned input voltage of the conversion module 30 as 15V and the reference voltage as 10V as an example, the sampling circuit 4011 compares the input voltage of the conversion module 30 with the reference voltage, and obtains that the input voltage of the conversion module 30 is greater than the reference voltage, Then the sampling circuit 4011 controls the switch circuit 4012 to disconnect the path between the sampling circuit 4011 and the control circuit 402, so that the control circuit 402 controls the constant current output of the conversion module according to the preset control voltage.

Optionally, as shown in FIG. 5a, in this embodiment, the sampling circuit 4011 includes an operational amplifier, the non-inverting input terminal of the operational amplifier is connected to the input terminal of the conversion module 30, and the inverting input terminal of the operational amplifier is used for To input the reference voltage, the output terminal of the operational amplifier is connected to the switch circuit 4012. Optionally, the sampling circuit 4011 can compare the input voltage of the transformation module 30 with the reference voltage through the operational amplifier.

Optionally, please refer to FIG. 5a. In this embodiment, the switch circuit 4012 includes a diode, the cathode of the diode is connected to the output terminal of the operational amplifier, and the anode of the diode is connected to the input terminal of the control circuit 402. The diode can disconnect the path between the sampling circuit 4011 and the control circuit 402 when the input voltage of the conversion module 30 is greater than the reference voltage, and turn on the sampling circuit 4011 and the control circuit 402 when the input voltage of the conversion module 30 is lower than the reference voltage. The path between the control circuits 402 is controlled, and the first voltage is output to the control circuit 402 . Optionally, the switch circuit 4012 may also include a switch circuit based on the COMP pin, or may also include a switch circuit based on the FB pin, which is not limited in this embodiment.

Exemplarily, as shown in FIG. 5b, assuming that the reference voltage Vref is 25V, when the sampling circuit 4011 determines that the DCDC input voltage Vin is greater than or equal to 25V, the anode voltage of the diode in the switch circuit 4012 is lower than the cathode voltage, and the diode does not conduct , the output of the operational amplifier in the control circuit 402 depends on Iref, that is, the input voltage of the DCDC will not affect the output current of the DCDC at this time, and the DCDC is still a constant current output. When the sampling circuit 4011 determines that the DCDC input voltage Vin is less than 25V, the anode voltage of the diode of the switch circuit 4012 is greater than the cathode voltage, and the diode is turned on, which is equivalent to reducing the operational amplifier in the control circuit 402 on the basis of Iref The input current of the positive input terminal, the output current of the operational amplifier in the control circuit 402 will also decrease, so that the input current of the COMP terminal of the DCDC decreases, thereby reducing the PWM of the output current of the DCDC, so that the output current of the DCDC also decreases. .

In this embodiment, the sampling circuit included in the voltage feed-forward circuit can compare the input voltage of the conversion module with the reference voltage to accurately obtain the comparison result, and then can accurately control the switch circuit when the input voltage of the conversion module is greater than the reference voltage Disconnect the path between the sampling circuit and the control circuit; when the input voltage of the conversion module is lower than the reference voltage, accurately control the switch circuit to conduct the path between the sampling circuit and the current control circuit, and accurately output the first The voltage improves the accuracy of the control switch circuit controlling the path between the sampling circuit and the control circuit.

In the above-mentioned embodiments of FIG. 5 to FIG. 5b, the function of the control module is realized by using an analog circuit. In one embodiment, the function of the control module can also be realized by a digital circuit. The above-mentioned control module 40 is used to generate the first signal according to the input voltage of the transformation module 30 and the above-mentioned reference voltage, and calculate the first signal and the preset control signal to obtain the second signal; the preset control signal is used to control the transformation module The output current is a preset output current; the conversion module 30 is configured to reduce the pulse duty cycle of the control signal of the conversion module 30 according to the second signal, so as to output the first current.

In this embodiment, a digital circuit can be used to realize the function of the control module, for example, a chip with data operation function is used to perform the function of the above-mentioned control module, and the input voltage of the conversion module 10 and the above-mentioned reference voltage are input into the chip After calculation, the second signal is output, and the second signal is fed back to the transformation module, so that the transformation module reduces the duty cycle of the control signal of the control module according to the second signal.

In this embodiment, the first signal can be generated by the data circuit according to the input voltage and the reference voltage of the transformation module, and the first signal and the preset control signal are calculated to obtain the second signal, and then the transformation module can reduce The pulse duty cycle of the control signal of the conversion module is used to output the first current lower than the preset output current, and the function of the control module is realized by using a digital circuit so that the circuit structure of the current control circuit is simpler.

In addition, the embodiment of the present application also provides a power supply device, the power supply device includes any current control circuit 01 or any current control circuit 02 provided in the previous embodiments.

The current control circuit 01 or the current control circuit 02 in the above-mentioned embodiments is designed with a feedforward circuit, which can adjust the output current of the conversion module according to the input voltage, so that the output current of the conversion module increases with the increase of the input voltage and increase, and decrease with the decrease of the input voltage, so that the output current changes accordingly with the change of the input voltage.

In one embodiment, as shown in Figure 6, the power supply device includes an input interface 110, a first rectification and filtering module 120, a switching power supply 130, a transformer 140, a current control circuit 01 or a current control circuit 02, a second rectification and filtering module 150. An output interface 160. Optionally, the power supply device may be an adapter, a car charger, or the like.

In this embodiment, the AC voltage can be input to the power supply device through the input interface 110, and the first rectification and filtering module 120 can receive the AC voltage transmitted through the input interface 110, and rectify and filter the AC voltage to obtain a pulsation with a first waveform DC voltage; optionally, the first waveform may be a steamed bun waveform. The switching power supply 130 may perform chopping modulation on the pulsating DC voltage output by the first rectifying and filtering module 120 to obtain a pulsating voltage having a second waveform. Optionally, the second waveform may be a square wave. The transformer 140 can perform voltage transformation processing on the pulsating voltage obtained after the switching power supply 130 is chopped and modulated, and the voltage after the voltage transformation processing is adjusted by the conversion circuit 01 provided in the embodiment of the present application or the conversion circuit 02 provided in the embodiment of the present application. , output the adjusted current, and then filter the adjusted current through the second rectification and filtering module 150, so as to obtain a relatively stable direct current.

In another embodiment, as shown in FIG. 7 , the power supply device includes a rectification and filtering circuit 210 , a current control circuit 01 (or a current control circuit 02 ) and a wireless transmission circuit 220 .

In this embodiment, after the AC voltage is input to the power supply device, it first enters the rectification and filtering circuit 210, and is transformed into a stable DC by the rectification and filtering circuit, and then the current is regulated by the current control circuit 01 or the current control circuit 02 provided in the embodiment of the present application. A fixed value is supplied to the wireless transmitting circuit 220, and the wireless transmitting circuit inverts the direct current provided by the conversion circuit 01 or the conversion circuit 02 into an alternating current that can be coupled to the transmitting coil, so that the alternating current is converted into an electromagnetic signal by the transmitting coil for transmission.

For example, taking the rectification and filtering circuit as an example of AC/DC, and the conversion circuit 01 or conversion circuit 02 provided in the embodiment of the present application as an example of DC/DC, the 220V alternating current output by the power grid is converted into a stable direct current through AC/DC, and then Then through the DC/DC conversion circuit, the current is adjusted to a fixed value and supplied to the wireless transmitting circuit. The wireless transmitting circuit inverts the direct current provided by the DC/DC into an alternating current that can be coupled to the transmitting coil and converts the alternating current into an electromagnetic signal through the transmitting coil. to launch.

In one embodiment, an electronic device is also provided, and the electronic device includes any current control circuit 01 or current control circuit 02 .

As shown in Figure 8, the electronic device includes a charging interface 310, a current control circuit 01, a battery 320 and a control module 330; wherein, in the electronic device, the position of the current control circuit 01 or the current control circuit 02 is connected between the charging interface 310 and the battery 320 , after converting the current input from the charging interface 310 , the converted current is provided to the battery 320 for charging. Wherein, the control module 330 is used to control the conversion circuit 01 or the conversion circuit 02 to realize the conversion of the input current.

In this embodiment of the application, electronic equipment refers to any electronic equipment that requires an external power supply or a built-in power supply, such as various personal computers, notebook computers, mobile phones (smart mobile terminals), tablet computers, and portable wearable devices. This is not limited. If it is an external power supply, the power supply may be a power adapter, a mobile power supply (power bank, travel charger), etc., which is not limited in this embodiment. Of course, in addition to terminals, electronic devices can also be devices that require power, such as cars, electric vehicles, drones, e-books, electronic cigarettes, smart electronic devices (including watches, bracelets, smart glasses, sweeping robots, etc.) ), small electronic products (including wireless earphones, Bluetooth speakers, electric toothbrushes, rechargeable wireless mice, etc.), or (5G) communication module power supplies, etc., which are not limited in the embodiments of this application.

In addition, in an embodiment, the embodiment of the present application also provides an embodiment of a current control method, as shown in FIG. 9 , this embodiment involves running a computer program to realize that the output current varies with the input voltage. specific process. The example then includes:

S101, converting the input current and/or input voltage and outputting it.

S102. When the input voltage is lower than the reference voltage, control the transformed output current to be a preset output current; when the input voltage is greater than the reference voltage, control the transformed output current to be a first current higher than the preset output current.

It can be understood that the above process is realized by computer program instructions, and these computer program instructions are provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing devices, so that through this computer or other programmable data The instructions executed by the processor of the processing device can implement this embodiment to realize that the output voltage increases with the increase of the input voltage. Of course, these computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means. Alternatively, these computer program instructions can also be loaded on a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer-implemented process, so that on the computer or other programmable device Executing the computer program instructions realizes the above functions.

In addition, in an embodiment, the embodiment of the present application also provides an embodiment of a current control method, as shown in FIG. 10 , this embodiment involves running a computer program to realize the change of the output current with the change of the input voltage specific process. The example then includes:

S201, converting the input current and/or the input voltage and outputting it.

S202. When the input voltage is lower than the reference voltage, control the transformed output current to be a first current lower than the preset output current; when the input voltage is greater than the reference voltage, control the transformed output current to be the preset output current.

It can be understood that the above process is realized by computer program instructions, and these computer program instructions are provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing devices, so that through this computer or other programmable data The instructions executed by the processor of the processing device can implement this embodiment to realize that the output voltage decreases as the input voltage decreases. Of course, these computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means. Alternatively, these computer program instructions can also be loaded on a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer-implemented process, so that on the computer or other programmable device Executing the computer program instructions realizes the above functions.

In addition, the embodiment of the present application also provides a current control device, as shown in FIG. 11 , including: a conversion module and a control module, wherein:

The transformation module is used for transforming the input current and/or the input voltage and then outputting it.

The current control device provided in this embodiment can implement the above embodiments of the current control method, and its implementation principle and technical effect are similar, and will not be repeated here.

In addition, the embodiment of the present application also provides a current control device, as shown in FIG. 12 , including: a conversion module and a control module, wherein:

A control module, configured to control the transformed output current to be a first current lower than the preset output current when the input voltage is lower than the reference voltage; The output current is the preset output current.

In addition, the embodiment of the present application also provides an electronic device, including a memory and a processor, and a computer program is stored in the memory. When the computer program is executed by the processor, the processor is made to perform any one of the current control methods provided in the above embodiments. step.

An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, any one of the current control method steps provided in the foregoing embodiments is implemented.

Those of ordinary skill in the art can understand that realizing all or part of the processes in the methods of the above embodiments can be completed by instructing related hardware through computer programs, and the computer programs can be stored in a non-volatile computer-readable storage medium , when the computer program is executed, it may include the procedures of the embodiments of the above-mentioned methods. Wherein, any references to memory, storage, database or other media used in the various embodiments provided in the present application may include at least one of non-volatile memory and volatile memory. Non-volatile memory may include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. 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).

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims

A current control circuit, characterized in that it comprises:

Transformation module, used for transforming the input current and/or input voltage and outputting it;

A control module, configured to control the output current of the conversion module to be a preset output current when the input voltage of the conversion module is lower than a reference voltage; and control the output current of the conversion module when the input voltage is greater than the reference voltage The output current is a first current higher than the preset output current.
The current control circuit according to claim 1, wherein the first current is obtained by increasing the pulse duty ratio of the control signal of the conversion module.
The current control circuit according to claim 1, wherein the first current is obtained by adjusting the frequency of the control signal of the conversion module, or the first current is obtained by adjusting the preset output current corresponding to The frequency of the control signal is obtained.
The current control circuit according to claim 2, wherein the control module is configured to generate a first voltage according to the input voltage and the reference voltage, and perform calculations on the first voltage and a preset control voltage , to obtain a second voltage; the preset control voltage is used to control the output current of the conversion module to be the preset output current;

The conversion module is configured to increase the pulse duty ratio of the control signal of the conversion module according to the second voltage, so as to output the first current.
The current control circuit according to claim 4, wherein the control module is configured to perform calculations on the input voltage and the reference voltage, and increase the signal obtained by the calculation to obtain the first Voltage.
The current control circuit according to claim 1, wherein the control module comprises a feedforward circuit and a control circuit;

The feed-forward circuit is configured to cut off the output voltage to the control circuit when the input voltage of the conversion module is lower than the reference voltage; when the input voltage is greater than the reference voltage, according to the input voltage and The reference voltage outputs a first voltage to the control circuit;

The control circuit is configured to control the output current of the conversion module to the preset output current according to a preset control voltage when the input voltage of the conversion module is lower than the reference voltage; When the reference voltage is used, the conversion module is controlled to output the first current according to the preset control voltage and the first voltage.
The current control circuit according to claim 6, wherein the feedforward circuit comprises a sampling circuit and a switch circuit;

The sampling circuit is used to compare the input voltage of the conversion module with the reference voltage, and when the input voltage of the conversion module is lower than the reference voltage, control the switch circuit to disconnect the sampling circuit from the reference voltage. The path between the control circuits; when the input voltage of the conversion module is greater than the reference voltage, the switch circuit is controlled to conduct the path between the sampling circuit and the control circuit, and the The circuit outputs the first voltage.
The current control circuit according to claim 7, wherein the sampling circuit comprises an operational amplifier, the non-inverting input terminal of the operational amplifier is connected to the input terminal of the conversion module, and the inverting input terminal of the operational amplifier is For inputting the reference voltage, the output terminal of the operational amplifier is connected with the switch circuit.
The current control circuit according to claim 8, wherein the switch circuit comprises a diode, the anode of the diode is connected to the output terminal of the operational amplifier, and the cathode of the diode is connected to the input terminal of the control circuit connect.
The current control circuit according to claim 2, wherein the control module is configured to generate a first signal according to the input voltage and the reference voltage, and perform operations on the first signal and a preset control signal , to obtain a second signal, the preset control signal is used to control the output current of the transformation module to be the preset output current;

The transformation module is configured to increase the pulse duty ratio of the control signal of the transformation module according to the second signal, so as to output the first current.
The current control circuit according to claim 10, wherein the control module is configured to perform calculations on the input voltage and the reference voltage, and increase the signal obtained by the calculation to obtain the first Signal.
The current control circuit according to claim 1, wherein the conversion module is a DCDC converter, and the control module and the DCDC converter can be integrated.
The current control circuit according to claim 1, wherein the reference voltage is determined according to the output power of the conversion module and the output current of the preceding circuit of the current control circuit.
A current control circuit, characterized in that it comprises:

Transformation module, used for transforming the input current and/or input voltage and outputting it;

A control module, configured to control the output current of the conversion module to be a first current lower than a preset output current when the input voltage of the conversion module is lower than the reference voltage; when the input voltage of the conversion module is greater than the reference voltage voltage, the output current of the conversion module is controlled to be the preset output current.
The current control circuit according to claim 14, wherein the first current is obtained by reducing the pulse duty ratio of the control signal of the conversion module.
The current control circuit according to claim 14, wherein the first current is obtained by adjusting the frequency of the control signal of the conversion module, or the first current is obtained by adjusting the preset output current corresponding to The frequency of the control signal is obtained.
The current control circuit according to claim 15, wherein the control module is configured to generate a first voltage according to the input voltage and the reference voltage, and calculate the first voltage and a preset control voltage , to obtain a second voltage; the preset control voltage is used to control the output current of the conversion module to be the preset output current;

The transformation module is configured to reduce the pulse duty cycle of the control signal of the transformation module according to the second voltage, so as to output the first current.
The current control circuit according to claim 17, wherein the control module is configured to calculate the input voltage and the reference voltage, and increase the signal obtained by the calculation to obtain the first Voltage.
The current control circuit according to claim 14, wherein the control module comprises a feedforward circuit and a control circuit;

The feedforward circuit is configured to output a first voltage to the control circuit according to the input voltage and the reference voltage when the input voltage of the conversion module is lower than the reference voltage; at the input of the conversion module When the voltage is greater than the reference voltage, cut off the output voltage to the control circuit;

The control circuit is configured to control the conversion module to output the first current according to a preset control voltage and the first voltage when the input voltage of the conversion module is lower than the reference voltage; When greater than the reference voltage, the output current of the conversion module is controlled according to the preset control voltage to be the preset output current.
The current control circuit according to claim 19, wherein the feedforward circuit comprises a sampling circuit and a switch circuit;

The sampling circuit is used to compare the input voltage of the conversion module with the reference voltage, and when the input voltage of the conversion module is lower than the reference voltage, control the switch circuit to turn on the sampling circuit and the reference voltage. the path between the control circuits, and output the first voltage to the control circuit; when the input voltage of the conversion module is greater than the reference voltage, control the switch circuit to disconnect the sampling circuit from the The path between the control circuits described above.
The current control circuit according to claim 20, wherein the sampling circuit comprises an operational amplifier, the non-inverting input terminal of the operational amplifier is connected to the input terminal of the conversion module, and the inverting input terminal of the operational amplifier is For inputting the reference voltage, the output terminal of the operational amplifier is connected with the switch circuit.
The current control circuit according to claim 21, wherein the switch circuit comprises a diode, the cathode of the diode is connected to the output terminal of the operational amplifier, and the anode of the diode is connected to the input terminal of the control circuit connect.
The current control circuit according to claim 15, wherein the control module is configured to generate a first signal according to the input voltage and the reference voltage, and perform operations on the first signal and a preset control signal , obtaining a second signal; the preset control signal is used to control the output current of the transformation module to be the preset output current;

The transformation module is configured to reduce the pulse duty cycle of the control signal of the transformation module according to the second signal, so as to output the first current.
The current control circuit according to claim 14, wherein the conversion module is a DCDC converter, and the control module and the DCDC converter can be integrated.
The current control circuit according to claim 14, wherein the reference voltage is determined according to the output power of the current control circuit and the output current of the preceding stage circuit of the conversion module.
An electric energy supply device, characterized by comprising the current control circuit according to any one of claims 1-25.
An electronic device, characterized by comprising the current control circuit according to any one of claims 1-25.
A current control method, characterized in that the method comprises:

Output after transforming the input current and/or input voltage;

When the input voltage is lower than the reference voltage, control the converted output current to be a preset output current; when the input voltage is greater than the reference voltage, control the converted output current to be higher than the preset output current The first current of current.
A current control method, characterized in that the method comprises:

Output after transforming the input current and/or input voltage;

When the input voltage is lower than the reference voltage, control the transformed output current to be a first current lower than the preset output current; when the input voltage is greater than the reference voltage, control the transformed output current to be the first current. The preset output current described above.
A current control device, characterized in that it comprises:

Transformation module, used for transforming the input current and/or input voltage and outputting it;

A control module, used to control the converted output current to be a preset output current when the input voltage is lower than the reference voltage; and control the converted output current to be higher than the reference voltage when the input voltage is greater than the reference voltage The first current of the preset output current.
A current control device, characterized in that it comprises:

Transformation module, used for transforming the input current and/or input voltage and outputting it;

A control module, configured to control the converted output current to be a first current lower than the preset output current when the input voltage is lower than the reference voltage; The output current is the preset output current.
An electronic device, comprising a memory and a processor, wherein a computer program is stored in the memory, wherein when the computer program is executed by the processor, the processor executes the The method steps described above.
A computer-readable storage medium on which a computer program is stored, wherein the computer program implements the method steps as claimed in claim 28 or 29 when executed by a processor.