Charge pump circuit, modulation method of charge pump circuit and electronic equipment

Abstract

The invention relates to a charge pump circuit, a modulation method of the charge pump circuit and electronic equipment. The charge pump circuit comprises a charge pump module, a driving module, an obtaining module and a frequency adjusting module. The charge pump module is used for connecting a load and is configured to output a target voltage to the load in response to the adjusted target switching frequency based on the power supply voltage. And the driving module is connected with the charge pump module and is configured to respond to the adjusted target switching frequency to drive the charge pump module. The acquisition module is configured to acquire a pre-input signal corresponding to a load. And the frequency regulation module is connected with the acquisition module and the driving module, and is configured to regulate the magnitude of the target switching frequency in real time according to the pre-input signal. The switching frequency of the charge pump can be dynamically regulated and controlled, so that the output efficiency of the charge pump circuit is improved, and electromagnetic interference and switching loss are avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of circuit control technology, and in particular to a charge pump circuit, a modulation method of the charge pump circuit, and an electronic device. Background Art

[0002] A charge pump is a switching power converter that uses capacitors as energy storage elements. Because it eliminates the need for bulky and expensive power inductors, charge pumps offer advantages such as low electromagnetic interference, a small footprint, and low system cost. This has led to their widespread use in portable electronic devices.

[0003] As users' demands for enhanced audio and tactile feedback in electronic devices continue to grow, audio power amplifiers and motor drivers are required to output higher voltages and greater power. However, the switching frequency of commonly used capacitor pumps is fixed, which can lead to excessive output capacity for small and medium-signal loads. The high switching frequency can also lead to electromagnetic interference and switching losses. Summary of the Invention

[0004] Based on this, it is necessary to provide a charge pump circuit, a modulation method for a charge pump circuit and an electronic device to address the above technical problems, which can dynamically adjust the switching frequency of the charge pump, thereby improving the output efficiency of the charge pump circuit and avoiding electromagnetic interference and switching losses.

[0005] In a first aspect, the present disclosure provides a charge pump circuit, comprising a charge pump module, a drive module, an acquisition module, and a frequency adjustment module. The charge pump module is connected to a load and is configured to output a target voltage to the load in response to an adjusted target switching frequency based on a supply voltage. The drive module is connected to the charge pump module and is configured to drive the charge pump module in response to the adjusted target switching frequency. The acquisition module is configured to acquire a pre-input signal corresponding to the load. The frequency adjustment module is connected to the acquisition module and the drive module and is configured to adjust the target switching frequency in real time based on the pre-input signal.

[0006] In some embodiments of the present disclosure, the target switching frequency is positively correlated with the power of the load.

[0007] In some embodiments of the present disclosure, the frequency adjustment module is further configured to: determine an adjustment range of the target switching frequency according to the pre-input signal; and adjust the target switching frequency within the adjustment range by using a continuous or discrete variable method.

[0008] In some embodiments of the present disclosure, the charge pump circuit further includes a detection module. The detection module is connected to the charge pump module and configured to detect a target voltage and obtain a difference between the target voltage and the supply voltage. A frequency adjustment module is also connected to the detection module and configured to adjust the target switching frequency in real time based on the pre-input signal and / or the difference between the target voltage and the supply voltage.

[0009] In some embodiments of the present disclosure, the charge pump circuit further includes a selection module. The frequency adjustment module is connected to the acquisition module and the detection module via the selection module. Accordingly, the selection module is configured to, in response to a selection request, select one of the pre-input signal and the difference between the target voltage and the supply voltage as a target signal, and transmit the target signal to the frequency adjustment module. The frequency adjustment module is configured to adjust the target switching frequency in real time based on the target signal.

[0010] In some embodiments of the present disclosure, the pre-input signal and the difference between the target voltage and the supply voltage are digital signals. Accordingly, the acquisition module, the selection module, and the frequency adjustment module are integrated into a digital chip.

[0011] In a second aspect, the present disclosure further provides a modulation method for a charge pump circuit, which is applicable to the charge pump circuits in some of the above embodiments. The modulation method comprises the following steps:

[0012] Get the pre-input signal corresponding to the load;

[0013] According to the pre-input signal, the target switching frequency is adjusted in real time;

[0014] The charge pump module is driven according to the adjusted target switching frequency, so that the charge pump module outputs a target voltage to the load based on the supply voltage and in response to the adjusted target switching frequency.

[0015] In some embodiments of the present disclosure, the target switching frequency is positively correlated with the power of the load.

[0016] In some embodiments of the present disclosure, the modulation method further includes: detecting a target voltage, and obtaining a difference between the target voltage and the supply voltage.

[0017] Accordingly, adjusting the target switching frequency in real time according to the pre-input signal includes:

[0018] determining an adjustment range of a target switching frequency according to the pre-input signal;

[0019] Within the adjustment range, the target switching frequency is adjusted in a continuous or discrete manner according to the difference between the target voltage and the supply voltage.

[0020] In a third aspect, the present disclosure further provides an electronic device comprising the charge pump circuit as described in any of the above embodiments.

[0021] The embodiments of the present disclosure may or may have at least the following advantages:

[0022] In the embodiment of the present disclosure, a driver module is provided in the charge pump circuit, connected to the charge pump module, and a frequency adjustment module is provided, connected to the acquisition module and the driver module. After the acquisition module obtains a pre-input signal corresponding to the load, the frequency adjustment module can adjust the target switching frequency in real time according to the pre-input signal, thereby causing the driver module to drive the charge pump module in response to the adjusted target switching frequency. This ensures that the charge pump module connected to the load outputs the target voltage to the load based on the supply voltage and in response to the adjusted target switching frequency. In this way, the embodiment of the present disclosure can dynamically adjust the switching frequency of the charge pump, thereby improving the output efficiency of the charge pump circuit and avoiding electromagnetic interference and switching losses.

[0023] The details of one or more embodiments of the present disclosure are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present disclosure will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present disclosure or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A structural block diagram of a charge pump circuit provided in some embodiments;

[0026] Figure 2 for Figure 1 An output waveform diagram of a target switching frequency and a target voltage in the charge pump circuit shown;

[0027] Figure 3 for Figure 1 A schematic diagram comparing the target switching frequency and target voltage of the charge pump circuit shown and the related art;

[0028] Figure 4 A structural block diagram of another charge pump circuit provided in some embodiments;

[0029] Figure 5 for Figure 4 An output waveform diagram of a target switching frequency and a target voltage in the charge pump circuit shown;

[0030] Figure 6 A structural block diagram of another charge pump circuit provided in some embodiments;

[0031] Figure 7 A flowchart of a modulation method of a charge pump circuit provided in some embodiments;

[0032] Figure 8 A flowchart of another modulation method of a charge pump circuit provided in some embodiments;

[0033] Figure 9 A flowchart of each sub-step in step S200 is provided in some embodiments. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0036] It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are merely used to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, a first element, component, region, layer, or portion discussed below may be represented as a second element, component, region, layer, or portion without departing from the teachings of the present invention.

[0037] It should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intervening element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc., if there is transmission of electrical signals or data between the connected objects.

[0038] It should be understood that the singular forms "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include," "comprising," "having," and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. At the same time, as used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0039] The embodiments of the present disclosure provide a charge pump circuit, a modulation method for a charge pump circuit, and an electronic device, which can dynamically adjust the switching frequency of the charge pump, thereby improving the output efficiency of the charge pump circuit and avoiding electromagnetic interference and switching losses.

[0040] See also Figure 1 The charge pump circuit 100 provided in an embodiment of the present disclosure includes: a charge pump module 1, a driving module 2, an acquisition module 3 and a frequency adjustment module 4. The charge pump module 1 is used to connect to the load 200 and is configured to output a target voltage Vout to the load 200 in response to the adjusted target switching frequency based on the supply voltage Vin. The driving module 2 is connected to the charge pump module 1 and is configured to drive the charge pump module 1 in response to the adjusted target switching frequency. The acquisition module 3 is configured to obtain a pre-input signal Sin corresponding to the load 200. The frequency adjustment module 4 is connected to the acquisition module 3 and the driving module 2 and is configured to adjust the target switching frequency in real time according to the pre-input signal Sin.

[0041] By way of example, the load 200 includes, but is not limited to, an audio power amplifier or a motor driver.

[0042] For example, the supply voltage Vin is a fixed voltage, such as that provided by a power supply. The power supply is external to the charge pump module 1. It is understood that the charge pump circuit 100 provided in the embodiment of the present disclosure is used to output a target voltage to the load 200, and the charge pump circuit 100 can also be considered as a power supply for the load 200.

[0043] For example, please see Figure 1 The charge pump module 1 is a multiple charge pump, which includes n external flying capacitors, for example Figure 1 As shown in FIG, the flying capacitor CF1 to the flying capacitor CF n The charge pump module 1 controls the switching of each flying capacitor in response to the adjusted target switching frequency, and can output a target voltage Vout to the load 200 based on the supply voltage Vin, for example, outputting a target voltage Vout equal to m times the supply voltage Vin, that is, Vout=m·Vin, m≤n.

[0044] In some examples, if the charge pump driving capability of the charge pump module 1 is relatively low and there is also a high voltage application scenario, the flying capacitors CF1 to CF n It can also be integrated inside the charge pump module 1. The charge pump module 1 is usually further provided with a plurality of power transistors.

[0045] In some examples, the driving module 2 can be a circuit used to improve the switching efficiency of high-power transistors and prevent non-ideal factors such as crosstalk. For example, it can be a level conversion circuit, or it can be a driving circuit located between the main circuit and the control circuit, and is an intermediate circuit for amplifying the signal of the control circuit (i.e., amplifying the signal of the control circuit so that it can drive the power transistor in the charge pump module 1).

[0046] In the embodiment of the present disclosure, a driver module 2 is provided in the charge pump circuit 100, connected to the charge pump module 1, and a frequency adjustment module 4 is provided, connected to the acquisition module 3 and the driver module 2. After the acquisition module 3 obtains the pre-input signal Sin corresponding to the load 200, the frequency adjustment module 4 can adjust the target switching frequency in real time according to the pre-input signal Sin, so that the driver module 2 drives the charge pump module 1 in response to the adjusted target switching frequency. This ensures that the charge pump module 1 connected to the load 200 outputs the target voltage Vout to the load 200 based on the supply voltage Vin and in response to the adjusted target switching frequency. In this way, the embodiment of the present disclosure can dynamically adjust the switching frequency of the charge pump module 1, thereby improving the output efficiency of the charge pump circuit 100 and avoiding electromagnetic interference and switching losses.

[0047] In some embodiments of the present disclosure, the target switching frequency is positively correlated with the power of the load 200. Specifically, as the power of the load 200 increases, the target switching frequency increases accordingly; and as the power of the load 200 decreases, the target switching frequency decreases accordingly.

[0048] Furthermore, the pre-input signal Sin corresponding to the load 200 is an input control signal of the charge pump circuit 100, and may be, for example, a control instruction pre-input in response to a user's request for the load 200. For example, taking the load 200 as an audio amplifier, the pre-input signal Sin corresponding to the load 200 may be, for example, an audio source signal or a volume adjustment signal.

[0049] For example, the pre-input signal Sin corresponding to the load 200 may be a digital signal or an analog signal. Accordingly, the frequency adjustment module 4 may also adjust the target switching frequency based on the digital signal or the analog signal.

[0050] In some examples, the pre-input signal Sin corresponding to the load 200 is a digital signal. Accordingly, the acquisition module 3 and the frequency adjustment module 4 can be integrated into a digital chip. The embodiments of the present disclosure do not limit the specific circuit structures of the acquisition module 3 and the frequency adjustment module 4, as long as they can achieve the corresponding functions.

[0051] In other examples, the pre-input signal Sin corresponding to the load 200 is an analog signal. The acquisition module 3 at least includes an analog-to-digital converter to convert the analog signal into a digital signal and then transmit it to the frequency adjustment module 4.

[0052] Optionally, the frequency adjustment module 4 includes but is not limited to a frequency division circuit with a variable frequency division ratio.

[0053] In the embodiment of the present disclosure, the acquisition module 3 first acquires the pre-input signal Sin corresponding to the load 200, and then the frequency adjustment module 4 can adjust the target switching frequency in real time according to the pre-input signal Sin, thereby accurately controlling the target switching frequency.

[0054] Figure 2 In the figure, the load 200 is an audio power amplifier, and the output waveform of the target switching frequency CLK and the target voltage Vout dynamically changes with the change of the pre-input signal Sin is illustrated. Figure 3 The target switching frequency CLK and target voltage Vout provided by the present disclosure are compared with the fixed switching frequency CLK in the related art. OLD and output voltage Vout OLD A comparison is shown.

[0055] Please combine Figure 2 and Figure 3 It is understood that in the embodiment of the present disclosure, the target voltage Vout as the power supply voltage of the load 200 needs to be greater than the voltage amplitude of the output signal of the load 200 to ensure that the output signal of the load 200 can be completely restored. Compared with the charge pump in the related art that uses a fixed switching frequency CLK OLD In the embodiment of the present disclosure, the acquisition module 3 can obtain the pre-input signal Sin corresponding to the load 200, and then the frequency adjustment module 4 can adjust the target switching frequency CLK in real time according to the pre-input signal Sin to accurately control the target switching frequency CLK, thereby accurately controlling the target voltage Vout. Figure 3 As shown in FIG, the output voltage Vout of the related art charge pump circuit OLDAlthough the target voltage Vout in the embodiment of the present disclosure will decrease as the power of the load 200 increases, the target voltage Vout in the embodiment of the present disclosure can decrease more when the power of the load 200 is relatively small (the decrease value is greater than the voltage amplitude of the output signal of the load 200), thereby effectively improving the output efficiency of the charge pump circuit 100 and avoiding electromagnetic interference and switching loss.

[0056] It should be noted that in some embodiments of the present disclosure, the frequency adjustment module 4 is further configured to: determine an adjustment range of the target switching frequency based on the pre-input signal Sin; and adjust the target switching frequency within the adjustment range using a continuous or discrete variable method. That is, embodiments of the present disclosure can determine the adjustment range of the target switching frequency based on the pre-input signal Sin corresponding to the load 200. For example, the upper limit of the adjustable range of the target switching frequency can be determined based on the amplitude of the pre-input signal Sin. The target switching frequency can then be adjusted within the adjustment range using a continuous or discrete variable method.

[0057] On this basis, see Figure 4 In some embodiments of the present disclosure, the charge pump circuit 100 further includes a detection module 5. The detection module 5 is connected to the charge pump module 1 (e.g., the output terminal of the charge pump module 1) and is configured to detect the target voltage Vout and obtain the difference between the target voltage Vout and the supply voltage Vin. The frequency adjustment module 4 is connected to the detection module 5 and is configured to adjust the target switching frequency in real time based on the pre-input signal Sin and / or the difference between the target voltage Vout and the supply voltage Vin.

[0058] For example, the frequency adjustment module 4 can determine the adjustment range of the target switching frequency according to the pre-input signal Sin, and then adjust the target switching frequency within the adjustment range according to the difference between the target voltage Vout and the supply voltage Vin by using a continuous variable or discrete variable method.

[0059] Here, the frequency adjustment module 4 adjusts the target switching frequency in real time based on the difference between the target voltage Vout and the supply voltage Vin, allowing for customized settings to be tailored to meet specific needs. For example, the target voltage Vout is a boosted version of the supply voltage Vin. Based on this, when the difference between the target voltage Vout and the supply voltage Vin is greater than a first threshold, the target switching frequency is reduced; when the difference between the target voltage Vout and the supply voltage Vin is less than a second threshold, the target switching frequency is increased; wherein the second threshold is less than the first threshold.

[0060] Optionally, the first threshold value is a difference between a first threshold voltage VthH and a power supply voltage Vin. The second threshold value is a difference between a second threshold voltage VthL and a power supply voltage Vin. The first threshold voltage VthH is an upper limit of a threshold voltage of a power transistor in the charge pump module 1, and the second threshold voltage VthL is a lower limit of a threshold voltage of a power transistor in the charge pump module 1.

[0061] In some examples, the supply voltage Vin is provided by a power supply, and the detection module 5 is further connected to the power supply to sample and detect the supply voltage Vin in real time. Alternatively, the supply voltage Vin is a fixed voltage, and the detection module 5 may pre-store the supply voltage Vin so as to perform a difference calculation between the target voltage Vout and the supply voltage Vin after detecting the target voltage Vout.

[0062] In some examples, the target voltage Vout detected by the detection module 5 can be a digital signal or an analog signal. Accordingly, the frequency adjustment module 4 can also adjust the target switching frequency based on the digital signal or the analog signal. The embodiments of the present disclosure do not limit the specific circuit structures of the detection module 5 and the frequency adjustment module 4, but only need to ensure that the corresponding functions can be achieved.

[0063] In some examples, the target voltage Vout detected by the detection module 5 is an analog signal. The detection module 5 at least includes an analog-to-digital converter to convert the analog signal into a digital signal before transmitting it to the frequency adjustment module 4 .

[0064] In the embodiment of the present disclosure, after the target voltage Vout is detected by the detection module 5 and the difference between the target voltage Vout and the supply voltage Vin is obtained, the frequency adjustment module 4 can adjust the target switching frequency in real time according to the difference between the target voltage Vout and the supply voltage Vin, thereby accurately controlling the target switching frequency.

[0065] Figure 5 In the figure, the load 200 is an audio power amplifier as an example to illustrate the output waveform of the target switching frequency CLK and the target voltage Vout that changes dynamically with the target voltage Vout, wherein the target voltage Vout is the boost voltage of the power supply voltage Vin. Figure 5As shown in FIG, based on the load 200: in the t1 stage, the target voltage Vout is output as a stable high level. When it is detected that the target voltage Vout is higher than the first threshold voltage VthH for a preset time (that is, the difference between the target voltage Vout and the power supply voltage Vin is greater than the first threshold), the target switching frequency CLK is frequency-reduced and the process enters the t2 stage; in the t2 stage, the target voltage Vout begins to decrease, and the difference between the target voltage Vout and the power supply voltage Vin decreases. When the target voltage Vout is lower than the second threshold voltage VthL (that is, the difference between the target voltage Vout and the power supply voltage Vin is less than the second threshold), the target switching frequency CLK is turned on. The target switching frequency CLK is frequency-up processed and enters the t3 stage; in the t3 stage, the target voltage Vout increases and is output as a stable high level, and the difference between the target voltage Vout and the supply voltage Vin increases. When it is detected that the target voltage Vout is higher than the first threshold voltage VthH for a preset time, the target switching frequency CLK is frequency-down processed again and enters the t4 stage; in the t4 stage, if the target voltage Vout cannot be reduced to the second threshold voltage VthL, the target switching frequency CLK can be continuously frequency-down processed until the target voltage Vout is lower than the second threshold voltage VthL and then the target switching frequency CLK is frequency-up processed.

[0066] See also Figure 6 In some embodiments of the present disclosure, the charge pump circuit 100 further includes a selection module 6. The frequency adjustment module 4 is connected to the selection module 6, which is in turn connected to the acquisition module 3 and the detection module 5. Accordingly, the selection module 6 is configured to, in response to a selection request, select one of the pre-input signal Sin and the difference between the target voltage Vout and the supply voltage Vin as a target signal, and transmit the target signal to the frequency adjustment module 4. The frequency adjustment module 4 is configured to adjust the target switching frequency in real time based on the target signal.

[0067] Optionally, the pre-input signal Sin and the difference between the target voltage Vout and the supply voltage Vin are digital signals. Accordingly, the acquisition module 3, the selection module 6 and the frequency adjustment module 4 can be integrated into a digital chip.

[0068] In some examples, the selection module 6 includes but is not limited to a data selector (Multiplexer, MUX for short), for example, a two-choice data selector.

[0069] In some examples, the selection request includes, but is not limited to, a first selection request generated in response to a switching frequency corresponding to the pre-input signal Sin being less than a first preset value, and a second selection request generated in response to a load matching temperature or a synchronous change in the external environment being greater than a second preset value. The first selection request is used to select the difference between the target voltage Vout and the supply voltage Vin as the target signal, and the second selection request is used to select the pre-input signal Sin as the target signal.

[0070] In the embodiment of the present disclosure, when the frequency adjustment module 4 adjusts the target switching frequency according to the pre-input signal Sin, and when the frequency adjustment module 4 adjusts the target switching frequency according to the difference between the target voltage Vout and the supply voltage Vin, reference can be made to the relevant records in some of the aforementioned embodiments, which will not be described in detail here.

[0071] Based on the same inventive concept, the disclosed embodiments further provide a modulation method for the charge pump circuit described above. The implementation solution provided by the modulation method for the charge pump circuit is similar to the implementation solution described in the charge pump circuit described above. Therefore, the specific limitations of the modulation method embodiments for one or more charge pump circuits provided below can be found in the above-described limitations on charge pump circuits and will not be further elaborated here.

[0072] See also Figure 7 In some embodiments of the present disclosure, the modulation method of the charge pump circuit may include the following steps S100~S300.

[0073] S100: Obtain a pre-input signal corresponding to the load.

[0074] S200, adjusting the target switching frequency in real time according to the pre-input signal.

[0075] S300 , driving a charge pump module according to the adjusted target switching frequency, so that the charge pump module outputs a target voltage to a load based on a supply voltage and in response to the adjusted target switching frequency.

[0076] In some embodiments of the present disclosure, the target switching frequency is positively correlated with the power of the load.

[0077] In some embodiments of the present disclosure, please refer to Figure 8 , the modulation method of the charge pump circuit further includes step S110.

[0078] S110 , detecting a target voltage and obtaining a difference between the target voltage and the supply voltage.

[0079] Accordingly, in step S200 , adjusting the target switching frequency in real time according to the pre-input signal may include the following steps S210 and S220 .

[0080] S210 , determining an adjustment range of a target switching frequency according to a pre-input signal.

[0081] S220 , adjusting the target switching frequency in a continuous variable or discrete variable manner according to the difference between the target voltage and the supply voltage within the adjustment range.

[0082] In some other embodiments of the present disclosure, please refer to Figure 9 In step S200, the target switching frequency is adjusted in real time according to the pre-input signal, which may include the following steps S210' to S240'.

[0083] S210 ′: determining an adjustment range of the target switching frequency according to the pre-input signal.

[0084] S220 ′, detecting a target voltage and obtaining a difference between the target voltage and the supply voltage.

[0085] S230 ′: in response to the selection request, select one of the pre-input signal and the difference between the target voltage and the supply voltage as the target signal.

[0086] S240', adjusting the target switching frequency in real time according to the target signal.

[0087] In some other embodiments of the present disclosure, the target voltage is a boosted voltage of the power supply voltage. When the difference between the target voltage and the power supply voltage is used as the target signal, the target switching frequency is adjusted in real time according to the target signal in step S240', which can be performed by: determining whether the difference between the target voltage and the power supply voltage is greater than a first threshold or less than a second threshold; when the difference between the target voltage and the power supply voltage is greater than the first threshold, the target switching frequency is reduced; when the difference between the target voltage and the power supply voltage is less than the second threshold, the target switching frequency is increased; wherein the second threshold is less than the first threshold.

[0088] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0089] Based on the same inventive concept, embodiments of the present disclosure further provide an electronic device, including the charge pump circuit described in any of the above embodiments. The solution provided by this electronic device is similar to the solution described in the charge pump circuit described above. Therefore, the specific limitations of this electronic device can be found in the above-mentioned limitations on the charge pump circuit and will not be further elaborated here.

[0090] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this disclosure.

[0091] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present disclosure. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

Claims

1. A charge pump circuit, characterized in that: include: a charge pump module connected to a load and configured to: output a target voltage to the load in response to an adjusted target switching frequency based on a supply voltage; a driving module connected to the charge pump module and configured to: drive the charge pump module in response to the adjusted target switching frequency; An acquisition module is configured to: acquire a pre-input signal corresponding to the load; The frequency adjustment module is connected to the acquisition module and the driving module, and is configured to adjust the target switching frequency in real time according to the pre-input signal.

2. The charge pump circuit according to claim 1, wherein: The target switching frequency is positively correlated with the power of the load.

3. The charge pump circuit according to claim 1, wherein: The frequency adjustment module is further configured to: determining an adjustment range of the target switching frequency according to the pre-input signal; Within the adjustment range, the target switching frequency is adjusted by a continuous value change or a discrete value change method.

4. The charge pump circuit according to claim 1, wherein: Also includes: a detection module, connected to the charge pump module, and configured to: detect the target voltage and obtain a difference between the target voltage and the supply voltage; The frequency adjustment module is further connected to the detection module and is configured to adjust the target switching frequency in real time according to the pre-input signal and / or the difference between the target voltage and the supply voltage.

5. The charge pump circuit according to claim 4, wherein: Also includes: Selection module; the frequency adjustment module is connected to the acquisition module and the detection module respectively through the selection module; The selection module is configured to: in response to a selection request, select one of the pre-input signal and the difference between the target voltage and the supply voltage as a target signal, and transmit the target signal to the frequency adjustment module; The frequency adjustment module is configured to adjust the target switching frequency in real time according to the target signal.

6. The charge pump circuit according to claim 5, wherein: The signal types of the pre-input signal and the difference between the target voltage and the supply voltage are digital signals; wherein, The acquisition module, the selection module and the frequency adjustment module are integrated into a digital chip.

7. A modulation method for a charge pump circuit, characterized in that: include: Get the pre-input signal corresponding to the load; According to the pre-input signal, the target switching frequency is adjusted in real time; A charge pump module is driven according to the adjusted target switching frequency, so that the charge pump module outputs a target voltage to the load based on a supply voltage and in response to the adjusted target switching frequency.

8. The modulation method of the charge pump circuit according to claim 7, characterized in that: The target switching frequency is positively correlated with the power of the load.

9. The modulation method of the charge pump circuit according to claim 7, characterized in that: Also includes: detecting the target voltage and obtaining a difference between the target voltage and the supply voltage; The step of adjusting the target switching frequency in real time according to the pre-input signal includes: determining an adjustment range of the target switching frequency according to the pre-input signal; Within the adjustment range, the target switching frequency is adjusted in a continuous variable or discrete variable manner according to the difference between the target voltage and the supply voltage.

10. An electronic device, characterized in that: The device comprises the charge pump circuit according to any one of claims 1 to 6.

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