CN116094318A

CN116094318A - Current control circuit, electronic equipment and current control method

Info

Publication number: CN116094318A
Application number: CN202310162349.4A
Authority: CN
Inventors: 陈世超; 孙添平; 戴贵荣; 许建超; 戴庆田
Original assignee: Shenzhen Aixiesheng Technology Co Ltd
Current assignee: Shenzhen Aixiesheng Technology Co Ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-05-09

Abstract

The application provides a current control circuit, electronic equipment and a current control method, wherein the current control circuit comprises a conversion module and a control module, and the conversion module is used for carrying out conversion processing on received input voltage so as to output voltages with different conversion multiples; the conversion module comprises a plurality of charge pumps, wherein each charge pump comprises an output branch, an equipotential branch and an on-chip capacitor; the control module is used for dynamically adjusting the working frequency of the conversion module according to the received charge pump load current signal so that the conversion module outputs output voltages with different conversion multiples according to the working frequency. According to the charge pump circuit, the working frequency of the charge pump can be dynamically adjusted according to the load current of the charge pump circuit of the internal capacitor, so that the extra current consumption caused by parasitic capacitors at two ends of the internal capacitor of the charge pump and the extra current consumption caused by a clock channel of the charge pump are reduced, and the efficiency of the charge pump is improved.

Description

Current control circuit, electronic equipment and current control method

Technical Field

The present disclosure relates to the field of integrated circuits, and in particular, to a current control circuit, an electronic device, and a current control method.

Background

With higher and higher electronic integration, the application environment is more and more complex, the chip often needs multiple voltage domains to supply power, and the charge pump is very popular as an energy storage element in the field of chip power supply. A charge pump is a DC-DC converter that mainly uses switched capacitor technology to increase or decrease the input voltage level, and can convert the input voltage into a stable output voltage by alternately charging and discharging a capacitor. In practical applications, the load of the charge pump is dynamically variable, so that in order to drive the heaviest load, the charge pump needs to operate at a correspondingly high operating frequency, and when the dynamic load of the charge pump becomes light, the charge pump does not need to maintain the high operating frequency, but in order to satisfy the dynamic heavy load of the charge pump, the charge pump also needs to operate at the high operating frequency, and the operating mode causes the extra current consumed by the charge pump at the light load and the high load to be as large, thereby reducing the efficiency of the charge pump. Therefore, a current control circuit capable of solving the above technical problems is needed.

The foregoing description is provided for general background information and does not necessarily constitute prior art.

Disclosure of Invention

Aiming at the technical problems, the application provides a current control circuit, electronic equipment and a current control method, which can reduce the extra current consumption of a charge pump and improve the efficiency of the charge pump.

The application provides a current control circuit, which comprises a conversion module and a control module, wherein the conversion module is connected with the control module;

the conversion module is used for carrying out conversion processing on the received input voltage so as to output voltages with different conversion multiples; the conversion module comprises a plurality of charge pumps, wherein each charge pump comprises an output branch, an equipotential branch and an on-chip capacitor;

the control module is used for dynamically adjusting the working frequency of the conversion module according to the received charge pump load current signal so that the conversion module outputs output voltages with different conversion multiples according to the working frequency.

Optionally, the current control circuit further includes a detection module, configured to detect a charge pump load current signal output by the conversion module, and send the charge pump load current signal to the control module.

Optionally, the dynamically adjusting the operating frequency of the conversion module according to the received charge pump load current signal includes:

according to a preset adjustment strategy, determining a corresponding preset clock signal according to the received charge pump load current signal;

and adjusting the working frequency of the conversion module based on the preset clock signal.

Optionally, the preset adjustment policy includes:

when the charge pump load current signal rises, the working frequency of the conversion module is increased;

and when the load current signal of the charge pump is reduced, the working frequency of the conversion module is reduced.

Optionally, the preset clock signal includes a first preset clock signal and a second preset clock signal, the conversion module includes a first charge pump and a second charge pump that are arranged in pairs, the first charge pump is connected with the second charge pump, the first charge pump includes a first output branch, a first equipotential branch, and a first on-chip capacitor, one end of the first output branch, one end of the first equipotential branch is connected with a receiving end of an input voltage, the other end of the first output branch is connected with an output end of the output voltage, and two ends of the first on-chip capacitor are respectively connected with the first output branch and the first equipotential branch correspondingly; the second charge pump comprises a second output branch, a second equipotential branch and a second on-chip capacitor, one end of the second output branch is connected with the receiving end of the input voltage, the other end of the second output branch is connected with the output end of the output voltage, and two ends of the second on-chip capacitor are respectively connected with the second output branch and the second equipotential branch correspondingly.

Optionally, when the conversion multiple is 2, the first output branch includes a first switch and a third switch, and the first equipotential branch includes a second switch and a fourth switch;

one end of the first switch, one end of the first capacitor and one end of the third switch are connected together, the other end of the first switch, one end of the second switch and the receiving end of the input voltage are connected together, the other end of the third switch is connected with the output end of the output voltage, the other end of the second switch, the other end of the first capacitor and one end of the fourth switch are connected together, and the other end of the fourth switch is grounded.

Optionally, when the conversion multiple is 2, the second output branch includes a fifth switch and a seventh switch, and the second equipotential branch includes a sixth switch and an eighth switch;

one end of the fifth switch, one end of the second on-chip capacitor and one end of the seventh switch are connected together, the other end of the fifth switch, one end of the sixth switch and the receiving end of the input voltage are connected together, the other end of the seventh switch is connected with the output end of the output voltage, the other end of the sixth switch, the other end of the second on-chip capacitor and one end of the eighth switch are connected together, and the other end of the eighth switch is grounded.

Optionally, the current control circuit further includes a power supply module, where the power supply module is connected to the conversion module and the control module, respectively, and is configured to provide driving power for the conversion module and the control module.

The application also provides an electronic device comprising the current control circuit.

The application also provides a current control method which is applied to the current control circuit, wherein the current control circuit comprises a conversion module, the conversion module is used for carrying out conversion processing on received input voltage so as to output voltage with different conversion multiples, the conversion module comprises a plurality of charge pumps, and the charge pumps comprise an output branch, an equipotential branch and an on-chip capacitor; the current control method comprises the following steps:

and dynamically adjusting the working frequency of the conversion module according to the received charge pump load current signal so that the conversion module outputs output voltages with different conversion multiples according to the working frequency.

The implementation of the embodiment of the application has the following beneficial effects:

as described above, the current control circuit, the electronic device and the current control method provided by the application, wherein the current control circuit comprises a conversion module and a control module, and the conversion module is connected with the control module; the conversion module is used for carrying out conversion processing on the received input voltage so as to output voltages with different conversion multiples; the conversion module comprises a plurality of charge pumps, wherein each charge pump comprises an output branch, an equipotential branch and an on-chip capacitor; the control module is used for dynamically adjusting the working frequency of the conversion module according to the received charge pump load current signal so that the conversion module outputs output voltages with different conversion multiples according to the working frequency. According to the current control scheme, the working frequency of the charge pump can be dynamically adjusted according to the load current of the charge pump circuit of the internal capacitor, the extra current consumption caused by parasitic capacitors at two ends of the internal capacitor of the charge pump and the extra current consumption caused by a clock channel of the charge pump can be reduced, and the efficiency of the charge pump is further improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic block diagram of a current control circuit in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a first charge pump according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a first charge pump according to an embodiment of the present application;

FIG. 4 is a schematic diagram showing a specific structure of a first implementation of a 2-fold charge pump current control circuit according to an embodiment of the present application;

FIG. 5 is a schematic diagram showing a second embodiment of a 2-fold charge pump current control circuit according to the embodiment of the present application;

fig. 6 is a timing diagram of the internal part of the 2-fold charge pump current control circuit in the embodiment of the present application.

The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings. Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the element defined by the phrase "comprising one … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element, and furthermore, elements having the same name in different embodiments of the present application may have the same meaning or may have different meanings, a particular meaning of which is to be determined by its interpretation in this particular embodiment or by further combining the context of this particular embodiment.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or," "and/or," "including at least one of," and the like, as used herein, may be construed as inclusive, or meaning any one or any combination. For example, "including at least one of: A. b, C "means" any one of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C ", again as examples," A, B or C "or" A, B and/or C "means" any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

It should be understood that, although the steps in the flowcharts in the embodiments of the present application are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the figures may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily occurring in sequence, but may be performed alternately or alternately with other steps or at least a portion of the other steps or stages.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present application, and are not of specific significance per se. Thus, "module," "component," or "unit" may be used in combination.

In the prior art, for a charge pump, the extra current consumed by the charge pump main body circuit is related to the operating frequency of the charge pump, and the higher the operating frequency is, the larger the extra current consumed by the charge pump main body circuit is. The smaller the equivalent output internal resistance of the charge pump is, the stronger the driving capability is, so that the load of the charge pump is heavier, the higher the working frequency of the charge pump is required, the larger the extra current consumed by the parasitic capacitance of the charge pump is caused, and the higher the working frequency of the charge pump is, the larger the current consumed by the clock channel of the charge pump is. Thus increasing the operating frequency of the charge pump in order to increase the driving capability of the charge pump results in a larger additional current being consumed by the charge pump.

In order to solve the above problems, the present application provides a current control circuit, an electronic device and a current control method, which can reduce the extra current consumption of a charge pump and improve the efficiency of the charge pump.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a current control circuit according to an embodiment of the present application. The current control circuit comprises a conversion module 100 and a control module 200, wherein the conversion module 100 is connected with the control module 200;

the conversion module 100 is configured to perform conversion processing on the received input voltage, so as to output voltages with different conversion multiples; the conversion module 100 includes several charge pumps including an output leg, an equipotential leg, and an on-chip capacitor.

The control module 200 is configured to dynamically adjust the operating frequency of the conversion module 100 according to the received charge pump load current signal, so that the conversion module 100 outputs output voltages with different conversion multiples according to the operating frequency.

Specifically, the conversion module 100 performs conversion processing on the input voltage to output voltages with different conversion multiples, where the conversion module 100 may include a plurality of charge pumps, each of which includes an output branch, an equipotential branch, and an on-chip capacitor, and the charge pumps are sequentially connected with each other; the control module 200 includes a clock channel, when the control module 200 performs conversion processing on the conversion module 100, the working frequency of the conversion module 100 is adjusted in the clock channel according to the received load current signal of the charge pump, the conversion module 100 converts the input voltage into the output voltage with a corresponding conversion multiple according to the adjusted working frequency to output, and ensures that the output voltage after the conversion processing is in a normal output state, thereby reducing extra current consumption caused by parasitic capacitance at two ends of an on-chip capacitor in the charge pump while ensuring normal operation of the charge pump circuit, and reducing extra current consumption of the clock channel in the control module 200, so as to improve the efficiency of the charge pump. The control module 200 and the conversion module 100 may be connected by constructing a connection channel between the control module 200 and the conversion module 100 through a transmission gate.

Optionally, in some embodiments, the current control circuit further includes a detection module for detecting a charge pump load current signal output by the conversion module and sending the detected charge pump load current signal to the control module.

Specifically, the current control circuit provided in the embodiment of the application may specifically further include a detection module, an input end of the detection module is connected with the conversion module, an output end of the detection module is connected with the control module, the detection module detects the charge pump load current signal output by the conversion module, and then sends the charge pump load current signal to the control module, so that the control module adjusts the working frequency of the conversion module in real time according to the charge pump load current signal.

Optionally, in some embodiments, the dynamically adjusting the operating frequency of the conversion module according to the received charge pump load current signal may specifically include:

and adjusting the working frequency of the conversion module based on a preset clock signal.

Specifically, in the present embodiment, the step of the control module 200 dynamically adjusting the operating frequency of the conversion module 100 according to the received charge pump load current signal is as follows: according to a preset adjustment strategy, a preset clock signal required by the adjustment is determined according to the received charge pump load current signal, and the preset clock signal is output to the control module through the clock channel, so that the working frequency of the conversion module is adjusted according to the preset clock signal.

Optionally, in some embodiments, the preset adjustment policy may specifically include:

when the load current signal of the charge pump rises, the working frequency of the conversion module is increased;

when the charge pump load current signal drops, the operating frequency of the conversion module is reduced.

Specifically, in this embodiment, the load current of the charge pump is dynamically changed, so that an adjustment policy is specified in advance, so that the control module adjusts the working frequency of the conversion module according to the preset adjustment policy, when the load current of the charge pump is increased, the working frequency of the charge pump is increased to improve the driving capability of the charge pump, and at this time, the current consumption of the charge pump is large; when the load current of the charge pump is reduced, the working frequency of the charge pump is synchronously reduced to reduce the driving capability of the charge pump, and the current of the charge pump is small at the moment, so that the working frequency of the charge pump is dynamically adjusted according to the dynamic load of the charge pump.

Optionally, in some embodiments, the preset clock signal includes a first preset clock signal and a second preset clock signal, and the conversion module includes a first charge pump and a second charge pump arranged in pairs, and the first charge pump and the second charge pump are connected.

As shown in fig. 2, fig. 2 is a schematic diagram of a specific structure of a first charge pump according to an embodiment of the present application. The first charge pump includes a first output branch 210, a first equipotential branch 220, and a first on-chip capacitor 230, where one end of the first output branch 210, one end of the first equipotential branch 220 are connected, and a receiving end of the input voltage is connected, the other end of the first output branch 210 is connected to an output end of the output voltage, and two ends of the first on-chip capacitor 230 are connected to the first output branch 210 and the first equipotential branch 220 respectively.

As shown in fig. 3, fig. 3 is a schematic diagram of a specific structure of a first charge pump according to an embodiment of the present application. The second charge pump includes a second output branch 310, a second equipotential branch 320, and a second on-chip capacitor 330, where one end of the second output branch 310 and one end of the second equipotential branch 320 are connected to a receiving end of the input voltage, the other end of the second output branch 310 is connected to an output end of the output voltage, and two ends of the second on-chip capacitor 330 are respectively connected to the second output branch 310 and the second equipotential branch 320 correspondingly.

It should be noted that, in the charge pump current control circuit with different conversion multiples, the number of the first output branch, the first equipotential branch and the first on-chip capacitor in the first charge pump, and the number of the second output branch, the second equipotential branch and the second on-chip capacitor in the second charge pump may be one or more. For example, in a 2-fold charge pump current control circuit, a first charge pump, a second charge pump, the first charge pump including a first output branch, an equipotential branch, and a first on-chip capacitor; the second charge pump includes a second output branch, an equipotential branch, and a second on-chip capacitor.

Alternatively, in some embodiments, as shown in fig. 4, fig. 4 is a schematic diagram of a specific structure of the 2-fold charge pump current control circuit. When the conversion multiple is 2, the first output branch 210 includes a first switch sw1 and a third switch sw3, and the first equipotential branch 220 includes a second switch sw2 and a fourth switch sw4; the first on-chip capacitance 230 may be a capacitor Cs1. One end of the first switch sw1, one end of the first on-chip capacitor Cs1 and one end of the third switch sw3 are commonly connected, the other end of the first switch sw1, one end of the second switch sw2 and the receiving end of the input voltage are commonly connected, the other end of the third switch sw3 is connected with the output end of the output voltage, the other end of the second switch sw2, the other end of the first on-chip capacitor Cs1 and one end of the fourth switch sw4 are commonly connected, and the other end of the fourth switch sw4 is grounded. Wherein the first switch sw1 and the fourth switch sw4 are controlled to be closed or opened by a clock signal CLKP, and the second switch sw2 and the third switch sw3 are controlled to be closed or opened by a clock signal CLKN; the clock signals CLKP and CLKN are each output to the charge pump channel of the conversion module in the clock channel of the control module.

Alternatively, in some embodiments, as shown in fig. 4, when the conversion factor is 2, the second output branch 310 includes a fifth switch sw5 and a seventh switch sw7, the second equipotential branch 320 includes a sixth switch sw6 and an eighth switch sw8, and the second on-chip capacitance 330 may be a capacitor Cs2; one end of the fifth switch sw5, one end of the second on-chip capacitor Cs2 and one end of the seventh switch sw7 are commonly connected, the other end of the fifth switch sw5, one end of the sixth switch sw6 and the receiving end of the input voltage are commonly connected, the other end of the seventh switch sw7 is connected with the output end of the output voltage, the other end of the sixth switch sw6, the other end of the second on-chip capacitor Cs2 and one end of the eighth switch sw8 are commonly connected, and the other end of the eighth switch sw8 is grounded. The sixth switch sw6 and the seventh switch sw7 are controlled to be closed or opened by a clock signal CLKP, and the fifth switch sw5 and the eighth switch sw8 are controlled to be closed or opened by a clock signal CLKN; the clock signals CLKP and CLKN are each output to the charge pump channel of the conversion module in the clock channel of the control module.

Optionally, in some embodiments, the current control circuit further comprises a power supply module connected to the conversion module and the control module, respectively, for providing driving power to the conversion module and the control module.

In summary, the current control circuit provided in the embodiments of the present application includes a conversion module and a control module, where the conversion module is connected to the control module; the conversion module is used for carrying out conversion processing on the received input voltage so as to output voltages with different conversion multiples; the conversion module comprises a plurality of charge pumps, wherein each charge pump comprises an output branch, an equipotential branch and an on-chip capacitor; the control module is used for dynamically adjusting the working frequency of the conversion module according to the received charge pump load current signal so that the conversion module outputs output voltages with different conversion multiples according to the working frequency. According to the current control scheme, the working frequency of the charge pump can be dynamically adjusted according to the load current of the charge pump circuit of the internal capacitor, the extra current consumption caused by parasitic capacitors at two ends of the internal capacitor of the charge pump and the extra current consumption caused by a clock channel of the charge pump can be reduced, and the efficiency of the charge pump is further improved.

Referring to fig. 5, fig. 5 is a schematic structural diagram of another implementation of a 2-fold charge pump current control circuit according to an embodiment of the present application.

As shown in fig. 5, the current control circuit of the 2-time charge pump includes a conversion module, where the conversion module includes a first charge pump and a second charge pump, and the first on-chip capacitor and the second on-chip capacitor are charge-discharge capacitors Cs1 and Cs2 of the charge pump with complementary clock phases, and capacitance values of the capacitors Cs1 and Cs2 are equal; since the capacitors Cs1 and Cs2 are on-chip capacitances, parasitic capacitances Cp1 and Cp2 exist on both upper and lower plates thereof, the parasitic capacitances Cp1 and Cp2 are parasitic capacitances of the upper and lower plates of the capacitor Cs1, and the parasitic capacitances Cp3 and Cp4 are parasitic capacitances of the upper and lower plates of the capacitor Cs2; vin is the input voltage of the charge pump current control circuit, and Vout is the output voltage of the charge pump current control circuit; iload may be a charge pump load current of the charge pump current control circuit; the clocks CLKP/CLKN are non-overlapping inverted clock circuits, and the charge on the capacitors Cs1 and Cs2 is periodically transferred by controlling the switches sw1 to sw8, so that the output voltage of the charge pump current control circuit is 2 times the input voltage. The capacitor Cs1 and the switches sw1 to sw4 together form a charge pump, and the charge pump is marked as a first charge pump with an initial phase of 0; the capacitor Cs2 and the switches sw5 to sw8 together form a further charge pump, denoted as second charge pump, the initial phase of which is 180 degrees with respect to the first charge pump. The first charge pump and the second charge pump thus together form a charge pump with complementary clock phases. The current control circuit of the 2-time charge pump comprises a control module comprising clock channels comprising non-overlapping inverted clock circuits.

Referring to fig. 6, a schematic diagram of the internal node voltage of a 2-fold charge pump current control circuit according to one embodiment is shown. As can be seen from fig. 6, when the load current Iload of the charge pump increases, the operating frequency clk_in of the charge pump is increased to increase the driving capability of the charge pump, and at this time, the parasitic capacitances of the upper and lower plates of the on-chip capacitor used by the charge pump main circuit consume additional currents which increase synchronously, so that the clock channel IN the charge pump consumes additional currents which increase synchronously; if the load current Iload of the charge pump is reduced, the operating frequency clk_in of the charge pump is synchronously reduced to reduce the driving capability of the charge pump, and at this time, the current consumed by the clock channel IN the charge pump is synchronously reduced due to the synchronous reduction of the additional current consumed by the parasitic capacitances of the upper and lower plates of the on-chip capacitor used by the charge pump main circuit, thereby resulting IN the synchronous reduction of the additional current consumed by the charge pump circuit. Therefore, the working frequency of the charge pump is dynamically adjusted according to the dynamic load of the charge pump, so that the charge pump can effectively drive the dynamic load, and the extra current consumed by a charge pump circuit is reduced, and the efficiency of the charge pump is improved.

The embodiment of the application also provides electronic equipment, which comprises the current control circuit.

The embodiment of the application also provides a current control method which is applied to the current control circuit, wherein the current control circuit comprises a conversion module, the conversion module is used for carrying out conversion processing on received input voltage so as to output voltage with different conversion multiples, and the conversion module comprises a plurality of charge pumps, wherein the charge pumps comprise an output branch, an equipotential branch and an on-chip capacitor; the current control method comprises the following steps:

The main execution body of each step in this embodiment is the control module 200 in the corresponding embodiment in fig. 1, and the detailed description is omitted herein with reference to fig. 1 and the related description in the corresponding embodiment in fig. 1.

According to the current control method, the current control for adjusting the working frequency of the charge pump is dynamically adjusted according to the load current of the charge pump circuit of the internal capacitor, so that the extra current consumption caused by parasitic capacitors at two ends of the internal capacitor of the charge pump and the extra current consumption caused by a clock channel of the charge pump can be reduced, and the efficiency of the charge pump is further improved.

The foregoing embodiments are merely examples of the present application, and are not intended to limit the scope of the patent application, so that all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, such as the combination of technical features of the embodiments, or direct or indirect application to other related technical fields, are included in the scope of the patent protection of the present application.

In addition, the present application may use the same or different reference numerals for structural elements having the same or similar characteristics. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, the term "for example" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "for example" is not necessarily to be construed as preferred or advantageous over other embodiments. The previous description is provided to enable any person skilled in the art to make or use the present application. In the above description, various details are set forth for purposes of explanation.

It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been shown in detail to avoid unnecessarily obscuring the description of the present application. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

Claims

1. The current control circuit is characterized by comprising a conversion module and a control module, wherein the conversion module is connected with the control module;

2. The current control circuit of claim 1, further comprising a detection module for detecting a charge pump load current signal output by the conversion module and sending to the control module.

3. The current control circuit of claim 1, wherein the dynamically adjusting the operating frequency of the conversion module based on the received charge pump load current signal comprises:

4. A current control circuit according to claim 3, wherein the preset adjustment strategy comprises:

5. The current control circuit of claim 3, wherein the preset clock signal comprises a first preset clock signal and a second preset clock signal, the conversion module comprises a first charge pump and a second charge pump which are arranged in pairs, the first charge pump is connected with the second charge pump, the first charge pump comprises a first output branch, a first equipotential branch and a first on-chip capacitor, one end of the first output branch, one end of the first equipotential branch is connected with a receiving end of an input voltage, the other end of the first output branch is connected with an output end of the output voltage, and two ends of the first on-chip capacitor are respectively connected with the first output branch and the first equipotential branch correspondingly; the second charge pump comprises a second output branch, a second equipotential branch and a second on-chip capacitor, one end of the second output branch is connected with the receiving end of the input voltage, the other end of the second output branch is connected with the output end of the output voltage, and two ends of the second on-chip capacitor are respectively connected with the second output branch and the second equipotential branch correspondingly.

6. The current control circuit of claim 5, wherein when the conversion multiple is 2, the first output branch comprises a first switch and a third switch, and the first equipotential branch comprises a second switch and a fourth switch;

7. The current control circuit of claim 5, wherein when the conversion multiple is 2, the second output branch includes a fifth switch and a seventh switch, and the second equipotential branch includes a sixth switch and an eighth switch;

8. The current control circuit of claim 1, further comprising a power module coupled to the conversion module and the control module, respectively, for providing driving power to the conversion module and the control module.

9. An electronic device comprising a current control circuit as claimed in any one of claims 1 to 8.

10. The current control method is characterized by being applied to a current control circuit, wherein the current control circuit comprises a conversion module, the conversion module is used for carrying out conversion processing on received input voltage so as to output voltage with different conversion multiples, the conversion module comprises a plurality of charge pumps, and the charge pumps comprise an output branch, an equipotential branch and an on-chip capacitor; the current control method comprises the following steps: