Power supply control device, electronic equipment and power supply control method

Abstract

The invention discloses a power supply control device, electronic equipment and a power supply control method, and relates to a power supply control technology, and the device comprises a signal processing module which is used for obtaining a to-be-output signal, and carrying out the first processing of the to-be-output signal, and obtaining an envelope signal, and the envelope signal represents the amplitude change of the to-be-output signal in a time dimension; the control module is connected with the signal processing module and the voltage reduction module and used for outputting a first control signal according to the envelope signal, and the first control signal is used for controlling the enabling state of the voltage reduction module; the voltage reduction module is connected with the control module and the power supply and used for responding to the first control signal to adjust the voltage reduction enabling state of the voltage reduction module; in the step-down enabling state, the step-down module starts a step-down processing function to carry out step-down processing on the output voltage output by the power supply and transmits the power supply voltage output by the step-down module to the signal output device; and in the non-step-down enabling state, the step-down module directly transmits the output voltage output by the power supply to the signal output device.

Description

Technical Field

[0001] The present application relates to power supply control technology, and more specifically, to a power supply control device, an electronic device and a power supply control method. Background Art

[0002] The current smart power amplifier can combine its own boost circuit to achieve the best efficiency. Take the audio external speaker scenario as an example. In the normal external speaker scenario, the smart power amplifier works at a voltage of about 4V, and there is basically no need to enable the boost circuit. As the working voltage increases, the boost circuit starts to boost the voltage to meet the output requirements of the smart power amplifier.

[0003] Since the power supply design of subsequent electronic devices includes multiple lithium batteries, currently usually two lithium batteries, namely 2S batteries, the battery supply voltage is the series voltage of multiple lithium batteries. Since the power demand of external signal output devices, such as smart power amplifiers, remains the same, if a higher power supply voltage is used, it will cause a lot of power waste, so a new power supply architecture and power supply method need to be designed. Summary of the invention

[0004] In view of this, this application provides the following technical solutions:

[0005] A first aspect of the present application provides a power supply control device, comprising:

[0006] A signal processing module, used for obtaining a signal to be output to a signal output device, and performing a first process on the signal to be output to obtain an envelope signal, wherein the envelope signal represents an amplitude change of the signal to be output in a time dimension;

[0007] A control module, connected to the signal processing module and the voltage reduction module respectively, and configured to output a first control signal according to the envelope signal, wherein the first control signal is used to control an enabling state of the voltage reduction module;

[0008] The voltage reduction module is connected to the control module and the power supply, and is used to adjust the voltage reduction enabling state of the voltage reduction module in response to the first control signal;

[0009] Wherein, in the step-down enabled state, the step-down module enables the step-down processing function to step-down the output voltage output by the power supply and transmits the power supply voltage output by the step-down module to the signal output device; in the non-step-down enabled state, the step-down module directly transmits the output voltage output by the power supply to the signal output device. In a possible implementation, the signal to be output includes multiple audio signals; the signal output device includes multiple power amplifiers for respectively corresponding to receiving each of the audio signals;

[0010] The control module is further used to output a second control signal according to the envelope signal, wherein the second control signal is used to control the boost enable state of the boost modules in each of the power amplifiers, and each of the boost modules is respectively connected to the output end of the buck module;

[0011] Among them, in the boost enabled state, the boost module enables the boost processing function to boost the supply voltage transmitted by the buck module; in the non-boost enabled state, the boost module directly transmits the supply voltage output by the buck module.

[0012] In a possible implementation, the envelope signal is the sum of amplitude changes of the multi-channel audio signals output to the multiple power amplifiers in the same time dimension.

[0013] In a possible implementation, the control module is used to:

[0014] When the envelope signal satisfies a first condition, outputting a first control signal to enable the voltage reduction module; the required voltage corresponding to the envelope signal represented by the first condition is less than the output voltage of the power supply;

[0015] When the envelope signal satisfies a second condition, a second control signal enabling the boost module is output; the second condition indicates that the required voltage corresponding to the envelope signal is greater than the output voltage of the power supply.

[0016] In a possible implementation, the control module includes a first Schmidt comparator and a second Schmidt comparator;

[0017] Wherein, the input end of the first Schmidt comparator is connected to the envelope signal output end of the signal processing module, the output end of the first Schmidt comparator is connected to the step-down module, and the first Schmidt comparator is used to output the first control signal;

[0018] The input end of the second Schmidt comparator is connected to the envelope signal output end of the signal processing module, the output end of the second Schmidt comparator is connected to the boost module, and the second Schmidt comparator is used to output the second control signal.

[0019] In a possible implementation, it also includes:

[0020] The synchronization processing module is used to perform time alignment processing on the envelope signal and the output signal of the signal to be output after being processed by the signal output device.

[0021] In a possible implementation, the envelope signal is a digital envelope signal, and the power supply control device further includes:

[0022] A digital-to-analog conversion module, connected to the signal processing module, for converting the digital envelope signal into an analog envelope signal, and sending the analog envelope signal to the step-down module and the control module;

[0023] The voltage reduction module is further used to adjust the voltage reduction parameters according to the analog envelope signal during the voltage reduction process of the output voltage output by the power supply.

[0024] A second aspect of the present application provides an electronic device, including a power supply control device, wherein the power supply control device includes:

[0025] A signal processing module, used for obtaining a signal to be output to a signal output device of an external device, and performing a first process on the signal to be output to obtain an envelope signal, wherein the envelope signal represents an amplitude change of the signal to be output in a time dimension;

[0026] A control module, connected to the signal processing module and the voltage reduction module respectively, and configured to output a first control signal according to the envelope signal, wherein the first control signal is used to control the working state of the voltage reduction module;

[0027] The voltage reduction module is connected to the control module and the power supply, and is used to adjust the voltage reduction enabling state of the voltage reduction module in response to the first control signal;

[0028] Among them, in the step-down enabled state, the step-down module enables the step-down processing function to step-down the output voltage output by the power supply and transmits the power supply voltage output by the step-down module to the signal output device; in the non-step-down enabled state, the step-down module directly transmits the output voltage output by the power supply to the signal output device.

[0029] In a possible implementation, it also includes:

[0030] A power amplifier assembly, comprising a plurality of power amplifiers, each of which is respectively connected to the signal processing module, the voltage reduction module and the control module; each of the power amplifiers comprises a voltage boost module, which is respectively connected to the control module and the voltage reduction module;

[0031] The control module is further used to output a second control signal according to the envelope signal, wherein the second control signal is used to control the boost enable state of each of the boost modules;

[0032] Among them, in the boost enabled state, the boost module enables the boost processing function to boost the supply voltage transmitted by the buck module; in the non-boost enabled state, the boost module directly transmits the supply voltage output by the buck module.

[0033] A third aspect of the present application provides a power supply control method, comprising:

[0034] Determine an envelope signal of a signal to be output to a signal output device, wherein the envelope signal represents an amplitude change of the signal to be output in a time dimension;

[0035] Outputting a first control signal according to the envelope signal, wherein the first control signal is used to control a buck enabling state of the buck module;

[0036] Among them, in the step-down enabled state, the step-down module enables the step-down processing function to step-down the output voltage of the power supply output and transmits the power supply voltage output by the step-down module to the signal output device; in the non-step-down enabled state, the step-down module directly transmits the output voltage output by the power supply to the signal output device.

[0037] In a possible implementation, it also includes:

[0038] Outputting a second control signal according to the envelope signal, wherein the second control signal is used to control a boost enabling state of a boost module in each signal output device;

[0039] Among them, in the boost enabled state, the boost module enables the boost processing function to boost the supply voltage transmitted by the buck module; in the non-boost enabled state, the boost module directly transmits the supply voltage output by the buck module.

[0040] In a possible implementation, it also includes:

[0041] determining a required voltage based on the envelope signal;

[0042] Based on the change trend and value of the required voltage, the buck enabling state of the buck module and the boost enabling state of the boost module are controlled.

[0043] In a possible implementation, controlling the buck enabling state of the buck module and the boost enabling state of the boost module based on the change trend and value of the required voltage includes:

[0044] If the required voltage is in the rising stage and in the first interval, the step-down module is controlled to work to reduce the output voltage of the power supply output, and the step-up module is controlled to only perform voltage transmission; the voltage in the first interval is less than the output voltage of the power supply output;

[0045] If the required voltage is in the rising stage and in the second interval, the step-down module and the step-up module are controlled to be used only for voltage transmission, and the voltage in the second interval is greater than the voltage in the first interval;

[0046] If the required voltage is in the rising stage and in the third interval, the step-down module is controlled to only perform voltage transmission, and the step-up module is controlled to work to increase the supply voltage output by the step-down module, and the value of the third interval is greater than the voltage of the second interval.

[0047] In a possible implementation, based on the change trend and value of the required voltage, controlling the buck enable state of the buck module and the boost enable state of the boost module includes:

[0048] If the required voltage is in a decreasing stage and reaches below a first voltage value, the boost module is controlled to stop working and only perform voltage transmission, and the buck module is controlled to only perform voltage transmission, and the first voltage value is within the second interval;

[0049] If the required voltage is in a decreasing stage and drops below a second voltage value, the voltage reduction module is controlled to operate to reduce the output voltage of the power supply, and the second voltage value is within the first interval.

[0050] In a possible implementation manner, before determining the required voltage based on the envelope signal, the method further includes:

[0051] The envelope signal and the output signal of the signal to be output processed by the signal output device are time-aligned.

[0052] In a possible implementation, it also includes:

[0053] The step-down module is controlled to adjust the step-down parameters according to the envelope signal during the step-down process of the output voltage output by the power supply.

[0054] It can be seen from the above technical solution that the embodiment of the present application discloses a power supply control device, an electronic device and a power supply control method, in which the step-down enable state of the step-down module is controlled by obtaining the envelope signal of the signal to be output. The step-down module can start the step-down processing function in the step-down enable state to transmit the stepped-down supply voltage to the signal output device. This will not cause a higher supply voltage to be transmitted to the signal output device, and will not cause a lot of power waste, thereby achieving the purpose of saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0056] Figure 1 A schematic diagram of the structure of a power supply control device provided in an embodiment of the present application;

[0057] Figure 2 and Figure 3 They are respectively another structural schematic diagram of a power supply control device provided in an embodiment of the present application;

[0058] Figure 4a A schematic diagram of the relationship between the demand voltage in the rising stage and the falling stage and the supply voltage output by the step-down module in an embodiment of the present application;

[0059] Figure 4b A schematic diagram of the relationship between the demand voltage in the rising stage and the falling stage and the supply voltage output by the boost module in an embodiment of the present application;

[0060] Figure 4c Another schematic diagram of the relationship between the voltage demand rising stage and the voltage demand falling stage and the supply voltage output by the step-down module in the embodiment of the present application;

[0061] Figure 4d Another schematic diagram of the relationship between the required voltage in the rising and falling stages of the required voltage and the supply voltage output by the boost module in an embodiment of the present application;

[0062] Figure 5 , Figure 6a and Figure 6b They are respectively another structural schematic diagram of a power supply control device provided in an embodiment of the present application;

[0063] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0064] Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 Another structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0065] Fig.13 A flow chart of a power supply control method provided in an embodiment of the present application;

[0066] Fig.14 Another flow chart of a power supply control method provided in an embodiment of the present application;

[0067] Fig.15 A partial flow chart of a power supply control method provided in an embodiment of the present application;

[0068] Fig.16a A schematic diagram of the relationship between the demand voltage in the rising stage and the supply voltage output by the step-down module in the embodiment of the present application, when the demand voltage is in the rising stage and the falling stage;

[0069] Fig.16b A schematic diagram of the relationship between the demand voltage and the supply voltage output by the boost module in the rising and falling stages of the demand voltage in the falling stage of the demand voltage in the embodiment of the present application;

[0070] Fig.17 Another partial flow chart of a power supply control method provided in an embodiment of the present application;

[0071] Fig.18 This is a schematic diagram of enabling voltage reduction in a power supply control architecture in a tablet device applicable to the present application;

[0072] Fig.19 This is a schematic diagram of enabling voltage boost in a power supply control architecture in a tablet device applicable to the present application. DETAILED DESCRIPTION

[0073] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0074] refer to Figure 1 , is a schematic diagram of the structure of a power supply control device provided in an embodiment of the present application, which can be deployed in an electronic device having a power supply and a signal output device, such as a smart phone, a tablet computer, a wearable device, a personal computer (PC), a netbook, etc. The technical solution in this embodiment is mainly used to reduce the power consumption of electronic devices.

[0075] Specifically, the power supply control device in this embodiment may include the following structure:

[0076] The signal processing module 1 is used to obtain a signal to be output to the signal output device a, and perform a first processing on the signal to be output to obtain an envelope signal.

[0077] The envelope signal represents the amplitude change of the signal to be output in the time dimension. The first process is envelope calculation process.

[0078] In one implementation, the signal to be output may include multiple audio signals, and the signal output device a may be a device capable of outputting audio signals, such as a low-frequency speaker or a high-frequency speaker.

[0079] In another implementation, the signal to be transmitted may include multiple video signals, and the signal output device a may be a graphics card device capable of outputting video signals. The graphics card device is connected to a display, and the graphics card device renders the video image to the display for output.

[0080] Taking the signal output device a as an example of a device capable of outputting audio signals, in a specific implementation, the signal output device a may include multiple power amplifiers, which may be referred to as PA for short. The power amplifiers are used to respectively receive each channel of audio signal so as to perform power amplification processing on the audio signal so as to output the audio signal.

[0081] In one implementation, the envelope signal is the sum of amplitude changes of the multi-channel audio signals output to the multiple power amplifiers in the same time dimension.

[0082] In a specific implementation, in this embodiment, envelope calculation, i.e., first processing, can be performed on multiple audio signals using an envelope signal calculation method, that is, taking the real-time maximum value of each audio signal and merging them to obtain the sum of the amplitude changes in the same time dimension, i.e., the envelope signal.

[0083] The step-down module 3 is used to step down the output voltage output by the power supply or bypass the output voltage. The power supply b is used to output the output voltage.

[0084] The control module 2 is connected to the signal processing module 1 and the voltage reduction module 3 respectively, and is used to output a first control signal according to the envelope signal, wherein the first control signal is used to control the voltage reduction enabling state of the voltage reduction module 3 .

[0085] When the envelope signal satisfies a first condition, the control module 2 is used to output a first control signal to enable the voltage reduction module 3 , and the required voltage corresponding to the envelope signal represented by the first condition is less than the output voltage of the power supply.

[0086] It should be noted that the output voltage of the power supply can also be understood as the voltage directly output from the power supply. The power supply is used to provide voltage to the signal output device. The power supply may include multiple lithium batteries, such as 2S batteries. That is, the control module 2 compares the required voltage corresponding to the envelope signal with the output voltage of the power supply. If the required voltage corresponding to the envelope signal is less than the output voltage of the power supply, it can be determined that the envelope signal meets the first condition. At this time, the control module 2 outputs a first control signal to enable the step-down module 3. The step-down module 3 can step down the output voltage of the power supply in the step-down enabled state. After stepping down, the power supply voltage output by the step-down module is transmitted to the signal output device a. If the required voltage corresponding to the envelope signal is greater than or equal to the output voltage of the power supply, it can be determined that the envelope signal does not meet the first condition, and step-down is not required at this time. At this time, the control module 2 can output a control signal to stop step-down, so as to disable the step-down module 3. The step-down module 3 does not step down the output voltage of the power supply, and the step-down module 3 directly transmits the output voltage of the power supply to the signal output device a.

[0087] The voltage reduction module 3 is connected to the control module 2 and the power supply b, and is used to adjust the voltage reduction enabling state of the voltage reduction module 3 in response to the first control signal.

[0088] In the step-down enabled state, the step-down module 3 enables the step-down processing function to step-down the output voltage output by the power supply b and transmits the power supply voltage output by the step-down module to the signal output device a.

[0089] In the non-step-down enabled state, the step-down module 3 directly transmits the output voltage output by the power supply b to the signal output device a.

[0090] That is to say, in this embodiment, the first control signal output by the control module enables the step-down module, that is, based on the envelope signal representing the amplitude change of the signal to be output, it is determined whether the output voltage of the power supply needs to be stepped down. If the output voltage needs to be stepped down, the step-down module is enabled, and the step-down module steps down the output voltage and then transmits the output power supply voltage to the signal output device. If step-down is not required, the step-down module is bypassed, and the step-down module directly transmits the output voltage of the power supply to the signal output device, thereby realizing flexible control of the step-down.

[0091] It should be noted that when the step-down module enables the step-down processing function to step down the output voltage of the power supply, the step-down amplitude of the output voltage of the power supply by the step-down module can be determined based on the load demand of the signal output device.

[0092] Through the above technical solution, it can be known that in a power supply control device disclosed in an embodiment of the present application, the buck enable state of the buck module is controlled by obtaining the envelope signal of the signal to be output. The buck module can start the buck processing function in the buck enable state to transmit the stepped-down supply voltage to the signal output device. This will not cause a higher voltage to be transmitted to the signal output device, and will not cause a lot of power waste, thereby achieving the purpose of saving energy.

[0093] Furthermore, in the present embodiment, the envelope signal can characterize the amplitude change of the signal to be output in the time dimension. Therefore, when the buck enable state of the buck module is controlled by the size of the envelope signal, the amplitude change of the required voltage can be determined in real time through the envelope signal, thereby controlling the buck enable state of the buck module in real time based on the amplitude change of the required voltage. This can enable the buck module more accurately, thereby improving the accuracy of the buck control.

[0094] In one implementation, the signal output device a includes a plurality of power amplifiers c, such as Figure 2 As shown in , each power amplifier c is used to respectively receive each channel of audio signals in the signals to be output, and the power amplifier c amplifies the audio signals and transmits them to the corresponding audio output unit d, such as a speaker.

[0095] Based on this, the control module 2 is further used to output a second control signal according to the envelope signal, and the second control signal is used to control the boost enabling state of the boost module 4 in each power amplifier c.

[0096] Each boost module 4 is connected to the output end of the buck module 3 respectively, and the output end of the boost module 4 is connected to the corresponding signal output device a.

[0097] Based on this, in the boost enabled state, the boost module 4 enables the boost processing function to boost the supply voltage transmitted by the buck module 3. In the non-boost enabled state, the boost module 4 directly transmits the supply voltage output by the buck module 3 to the signal output device a.

[0098] That is to say, in this embodiment, the boost module is enabled by the second control signal output by the control module, that is, based on the envelope signal representing the amplitude change of the signal to be output, it is determined whether the output voltage of the power supply needs to be stepped down and whether the power supply voltage output by the step-down module needs to be stepped up. If the output voltage of the power supply needs to be stepped down, the step-down module is enabled, and the step-down module steps down the output voltage of the power supply in advance and then transmits the output power supply voltage to the signal output device through the step-up module. If the output voltage of the power supply does not need to be stepped down, the bypass module is enabled. The step-down module or the step-down parameters of the step-down module are adjusted so that no step-down effect is produced. The output voltage of the power supply passes through the step-down module to become the supply voltage and is transmitted to the boost module. If it is necessary to boost the supply voltage transmitted by the step-down module, the boost module is enabled, and the boost module boosts the supply voltage transmitted by the step-down module and then transmits it to the signal output device. If boosting is not required, the boost module is bypassed or the boost parameters of the boost module are adjusted so that no boost effect is produced. The boost module directly transmits the supply voltage transmitted by the step-down module to the signal output device, thereby realizing flexible control of step-down and step-up.

[0099] It should be noted that when the boost module enables the boost processing function to boost the supply voltage transmitted by the buck module, the boost amplitude of the supply voltage transmitted by the boost module to the buck module can be determined based on the load demand of the signal output device.

[0100] Based on the above implementation, when the envelope signal meets the second condition, the control module 2 is used to output a second control signal to enable the boost module 4. The second condition indicates that the required voltage corresponding to the envelope signal is greater than the output voltage of the power supply.

[0101] That is to say, the control module 2 compares the required voltage corresponding to the envelope signal with the output voltage of the power supply. If the required voltage corresponding to the envelope signal is greater than the power supply voltage transmitted by the step-down module (when the step-down module does not step down the output voltage, the power supply voltage transmitted by the step-down module is the output voltage of the power supply), then it can be determined that the envelope signal meets the second condition. At this time, the control module 2 outputs the second control signal to enable the boost module 4. The boost module 4 can boost the power supply voltage transmitted by the step-down module in the boost enabled state. At the same time, the control module 2 will not output the first control signal, that is, the step-down module 3 will not be enabled. At this time, the step-down function of the step-down module 3 will not take effect, and the output voltage output by the power supply will be directly transmitted to the boost module 4. If the required voltage corresponding to the envelope signal is less than or equal to the power supply voltage transmitted by the step-down module, then it can be determined that the envelope signal does not meet the second condition, and no boost is required at this time. At this time, the control module 2 can output a control signal to stop boosting to disable the boost module 4, and the boost module 4 does not boost the power supply voltage transmitted by the step-down module.

[0102] Furthermore, if the control module 2 determines that the required voltage corresponding to the envelope signal is equal to the output voltage of the power supply, then the control module 2 will not output the first control signal, that is, the step-down module 3 will not be enabled. At this time, the step-down module 3 does not step down the output voltage of the power supply, and the boost module 4 does not step up the power supply voltage transmitted by the step-down module, that is, it does not step up or step down. If the control module 2 determines that the required voltage corresponding to the envelope signal is less than the output voltage of the power supply, then the control module 2 outputs the first control signal, that is, it will enable the step-down module 3. At this time, the step-down module 3 steps down the output voltage of the power supply, and the boost module 4 does not step up the power supply voltage transmitted by the step-down module, that is, it does not step up but steps down.

[0103] In one implementation, the control module 2 may include a first signal comparator 21 and a second signal comparator 22. Figure 3 As shown in , the input end of the first signal comparator 21 is connected to the envelope signal output end of the signal processing module 1, and the output end of the first signal comparator 21 is connected to the step-down module 3. The first signal comparator 21 is used to compare the required voltage corresponding to the envelope signal with the output voltage of the power supply. If the required voltage corresponding to the envelope signal is less than the output voltage of the power supply, it can be determined that the envelope signal meets the first condition. At this time, the first signal comparator 21 outputs a first control signal to enable the step-down module.

[0104] The input end of the second signal comparator 22 is connected to the envelope signal output end of the signal processing module 1, and the output end of the second signal comparator 22 is connected to the boost module 4. The second signal comparator 22 is used to compare the required voltage corresponding to the envelope signal with the power supply voltage transmitted by the buck module. If the required voltage corresponding to the envelope signal is greater than the power supply voltage transmitted by the buck module (when the buck module does not step down the output voltage, the power supply voltage transmitted by the buck module is the output voltage of the power supply), then it can be determined that the envelope signal meets the second condition. At this time, the second signal comparator 22 outputs a second control signal to enable the boost module 4.

[0105] In a specific implementation, the first signal comparator 21 and the second signal comparator 22 may be Schmidt comparators; in other implementations, the first signal comparator 21 and the second signal comparator 22 may also be other types of signal comparators.

[0106] Take the first signal comparator 21 and the second signal comparator 22 as an example, the first signal comparator 21 and the second signal comparator 22 are both common signal comparators. Figure 4a As shown by the solid line in , it is a schematic diagram of the relationship between the demand voltage (Vsigal) in the rising stage and the power supply voltage (Vbuck) output by the buck module. When the demand voltage corresponding to the envelope signal is in a rising trend, the first signal comparator determines that the envelope signal meets the first condition when the demand voltage corresponding to the envelope signal is less than the output voltage of the power supply. At this time, the first signal comparator outputs a first control signal, so that before the envelope signal continues to rise and reaches the output voltage of the power supply, the buck module is enabled to buck the output voltage of the power supply. At the same time, the second comparator outputs a control signal that prohibits boosting, and the boost module is not enabled, and the boost module does not work. Therefore, as the demand voltage continues to rise, the output voltage of the power supply is bucked by using the buck function of the buck module, and accordingly, the power supply voltage provided to the signal output device after passing through the buck module and the boost module can match the demand voltage.

[0107] Furthermore, as the required voltage continues to rise, when the required voltage reaches the output voltage of the power supply (such as the rated working voltage V2s of a 2S battery), the first signal comparator determines that the required voltage corresponding to the envelope signal is equal to the output voltage of the power supply. At this time, the first signal comparator does not output the first control signal but outputs a control signal for prohibiting voltage reduction. In this way, when the envelope signal continues to rise and reaches the output voltage of the power supply, the step-down module is not enabled and the step-down module does not work. At the same time, the second comparator outputs a control signal for prohibiting voltage boost, and the boost module is not enabled and the boost module does not work. Accordingly, after passing through the step-down module and the boost module, the power supply voltage provided to the signal output device can match the required voltage, that is, the output voltage of the power supply.

[0108] Further, such as Figure 4b As shown by the solid line in , it is a schematic diagram of the relationship between the demand voltage (Vsigal) in the rising stage and the supply voltage (Vboost) output by the boost module. As the demand voltage continues to rise, the demand voltage exceeds the output voltage of the power supply, and the first signal comparator determines that the demand voltage corresponding to the envelope signal is greater than the output voltage of the power supply. At this time, the first signal comparator outputs a control signal that prohibits voltage reduction, and the buck module is not enabled. The buck module does not perform voltage reduction processing on the output voltage of the power supply, and the supply voltage transmitted from the buck module to the boost module is the output voltage of the power supply. At the same time, the second comparator determines that the demand voltage corresponding to the envelope signal is greater than the output voltage of the power supply. At this time, the second signal comparator outputs a second control signal to enable the boost module, and the boost module performs voltage boost processing on the output voltage of the power supply (i.e., the supply voltage transmitted from the buck module to the boost module). Therefore, as the demand voltage continues to rise, the boost function of the boost module is used to boost the output voltage of the power supply. Correspondingly, the supply voltage provided to the signal output device after passing through the buck module and the boost module can match the demand voltage.

[0109] Take the first signal comparator 21 and the second signal comparator 22 as an example, the first signal comparator 21 and the second signal comparator 22 are both common signal comparators. Figure 4b As shown by the dotted line in , it is a schematic diagram of the relationship between the demand voltage (Vsigal) in the falling stage and the power supply voltage (Vboost) output by the boost module. The second comparator determines that the demand voltage corresponding to the envelope signal is greater than the output voltage of the power supply. At this time, the second signal comparator outputs a second control signal to enable the boost module, and the boost module performs a boost process on the output voltage. At the same time, the first signal comparator determines that the demand voltage corresponding to the envelope signal is greater than the output voltage of the power supply. At the same time, the first signal comparator outputs a control signal that prohibits step-down, disabling the step-down module, and the step-down module does not step down the output voltage of the power supply. Therefore, when the demand voltage is higher than the output voltage of the power supply, even if the demand voltage continues to decrease, the boost function of the boost module can be used to boost the output voltage of the power supply. Accordingly, the power supply voltage provided to the signal output device a after passing through the step-down module and the boost module can match the demand voltage.

[0110] Furthermore, as the required voltage continues to decrease, when the required voltage reaches the output voltage of the power supply (such as the rated working voltage V2s of a 2S battery), the second comparator determines that the required voltage corresponding to the envelope signal is equal to the output voltage of the power supply, and outputs a control signal that prohibits boosting, disabling the boost module, and the boost module no longer performs boost processing. At the same time, the first signal comparator determines that the required voltage corresponding to the envelope signal is equal to the output voltage of the power supply. At this time, the first signal comparator outputs a control signal that prohibits step-down, disabling the step-down module, and the step-down module does not step-down the output voltage of the power supply. In this way, when the envelope signal continues to decrease and reaches the output voltage of the power supply, the step-down module does not step-down the output voltage of the power supply, and the step-up module does not step-up the supply voltage transmitted from the step-down module.

[0111] Further, such as Figure 4a As shown by the dotted line in , it is a schematic diagram of the relationship between the demand voltage (Vsigal) in the falling stage and the power supply voltage (Vbuck) output by the buck module. As the demand voltage continues to decrease, the demand voltage is less than the output voltage of the power supply. When the demand voltage corresponding to the envelope signal is less than the output voltage of the power supply, the first signal comparator determines that the envelope signal meets the first condition. At this time, the first signal comparator outputs a first control signal, so that after the envelope signal continues to decrease to less than the output voltage of the power supply, the buck module is enabled to step down the output voltage of the power supply. At the same time, the second comparator outputs a control signal that prohibits boosting, disabling the boost module, and the boost module does not boost the power supply voltage transmitted by the buck module. Therefore, as the demand voltage continues to decrease, the buck function of the buck module is used in time to step down the output voltage. Accordingly, the power supply voltage provided to the signal output device after passing through the buck module and the boost module can match the demand voltage.

[0112] It can be seen that the common type of signal comparator can enable and disable the boost module and the buck module in time through a single threshold (the output voltage of the power supply) comparison, so as to boost and buck the output voltage of the power supply in real time, so that the power supply voltage provided to the signal output device continues to follow the required voltage.

[0113] It should be noted that the boost module 4 and the buck module 3 may not be in the enabled state at the same time, or the boost module 4 and the buck module 3 may both be in the enabled state. The enabled state can be understood as the power-on state. The boost module 4 in the power-on state starts the boost processing function only when the required voltage corresponding to the envelope signal is greater than the power supply voltage transmitted by the buck module, and the buck module 3 in the power-on state starts the buck processing function only when the required voltage corresponding to the envelope signal is less than the output voltage of the power supply. However, when the boost module 4 starts the boost processing function, the buck module 3 does not start the buck processing function; when the buck module 3 starts the buck processing function, the boost module 4 does not start the boost processing function.

[0114] Taking the first signal comparator 21 and the second signal comparator 22 as Schmidt comparators respectively as an example, the control module 2 may include a first Schmidt comparator and a second Schmidt comparator. The input end of the first Schmidt comparator is connected to the envelope signal output end of the signal processing module 1, the output end of the first Schmidt comparator is connected to the step-down module 3, and the first Schmidt comparator is used to output a first control signal.

[0115] For example, the first Schmidt comparator compares the required voltage corresponding to the envelope signal with the output voltage of the power supply. If the required voltage corresponding to the envelope signal is less than the output voltage of the power supply, it can be determined that the envelope signal meets the first condition. At this time, the first Schmidt comparator outputs a first control signal to enable the buck module.

[0116] The input end of the second Schmidt comparator is connected to the envelope signal output end of the signal processing module 1 , the output end of the second Schmidt comparator is connected to the boost module 4 , and the second Schmidt comparator is used to output a second control signal.

[0117] For example, the second Schmidt comparator compares the required voltage corresponding to the envelope signal with the output voltage of the power supply. If the required voltage corresponding to the envelope signal is greater than the power supply voltage transmitted by the buck module (when the buck module does not step down the output voltage, the power supply voltage transmitted by the buck module is the output voltage of the power supply), then it can be determined that the envelope signal meets the second condition. At this time, the second Schmidt comparator outputs a second control signal to enable the boost module.

[0118] In one scenario, starting from the minimum stage of the required voltage corresponding to the envelope signal, when the required voltage corresponding to the envelope signal is in a rising trend, the first Schmitt comparator compares the required voltage corresponding to the envelope signal with the first threshold (Vbuck_close), thereby controlling the buck enable state of the buck module. The first threshold is less than the output voltage of the power supply, for example, the first threshold and the output voltage may differ by the first threshold. Figure 4cThe solid line in the middle is a schematic diagram of the relationship between the demand voltage (Vsigal) and the supply voltage (Vbuck) output by the buck module in the rising stage of the demand voltage. That is to say, when the demand voltage corresponding to the envelope signal is less than the first threshold, the first Schmidt comparator determines that the envelope signal meets the first condition. At this time, the first Schmidt comparator outputs the first control signal, so that before the demand voltage corresponding to the envelope signal continues to rise to the first threshold, the buck module is in a buck-enabled state, and the buck module performs a buck process on the output voltage of the power supply when the demand voltage corresponding to the envelope signal is less than the output voltage of the power supply, so that the supply voltage transmitted from the buck module to the boost module can match the demand voltage. In addition, when the demand voltage corresponding to the envelope signal continues to rise to the first, the buck module is disabled, that is, it enters a non-buck-enabled state, and the buck module does not buck the output voltage of the power supply. The supply voltage transmitted by the buck module is the output voltage of the power supply, such as the rated working voltage V2s of the 2S battery. At this time, the boost module does not start the boost processing function, and the power supply provides the output voltage of the power supply to the signal output device.

[0119] At the same time, when the required voltage corresponding to the envelope signal is in a rising trend, the second Schmidt comparator compares the required voltage corresponding to the envelope signal with the second threshold (Vboost_open), thereby enabling the boost module. After the required voltage corresponding to the envelope signal exceeds the output voltage of the power supply, the enabled boost module can promptly boost the output voltage of the power supply. The second threshold is less than the output voltage of the power supply. For example, the second threshold and the attribute voltage of the power supply may differ by a second difference. Figure 4d The solid line in the middle is a schematic diagram of the relationship between the demand voltage (Vsigal) and the supply voltage (Vboost) output by the boost module during the rising stage of the demand voltage. That is, as the demand voltage corresponding to the envelope signal continues to rise and reaches the output voltage of the power supply, before the demand voltage corresponding to the envelope signal reaches the second threshold, the second Schmidt comparator determines that the envelope signal meets the second condition. At this time, the second Schmidt comparator outputs the second control signal, so that when the demand voltage corresponding to the envelope signal continues to rise to the second threshold, the boost module is enabled. Afterwards, as the demand voltage continues to rise and rises to a level that exceeds the supply voltage transmitted by the buck module (i.e., the output voltage of the power supply), even if the supply voltage transmitted by the buck module is boosted, the supply voltage transmitted by the boost module to the signal output device can match the demand voltage.

[0120] In another scenario, starting from the stage where the required voltage corresponding to the envelope signal exceeds the output voltage of the power supply, when the required voltage corresponding to the envelope signal is in a decreasing trend, the second Schmitt comparator compares the required voltage corresponding to the envelope signal with the third threshold (Vboost_close), thereby lagging the non-enabled boost module. The third threshold is less than the output voltage of the power supply, for example, the third threshold and the attribute voltage of the power supply may differ by a third difference. Figure 4d The dotted line in the middle is a schematic diagram of the relationship between the demand voltage (Vsigal) and the supply voltage (Vboost) output by the boost module in the demand voltage drop stage. That is to say, as the demand voltage corresponding to the envelope signal continues to drop and drops to the output voltage of the power supply, the second Schmitt comparator enables the boost module through the second control signal, and the boost module boosts the output voltage of the power supply when the demand voltage corresponding to the envelope signal is greater than the output voltage of the power supply, so that the supply voltage provided to the signal output device can match the demand voltage. In addition, after the demand voltage corresponding to the envelope signal drops to the output voltage of the power supply and then falls below the third threshold, the boost module remains in the boost enabled state. It should be noted that if the demand voltage corresponding to the envelope signal is not greater than the output voltage of the power supply, the boost module in the boost enabled state does not boost the supply voltage transmitted by the buck module (the boost module is only powered on and enabled but the boost processing function is not started). Only after the demand voltage corresponding to the envelope signal drops to the third threshold, the boost module is disabled (i.e., disabled).

[0121] It should be noted that Figure 4c and Figure 4d The scenario where the required voltage is constantly rising and falling is used as an example for explanation. In actual operation, due to the continuous change of the signal to be output, the required voltage is actually in the process of constantly alternating between rising and falling, that is, jittering. Based on this, in this embodiment, the third threshold is less than the second threshold through the Schmidt comparator, so that when the required voltage corresponding to the envelope signal jitters near the second threshold or the third threshold, the boost module will not be frequently enabled and disabled. For example, after the required voltage rises to exceed the second threshold, the boost module is enabled, but the required voltage may suddenly drop below the second threshold (but not to the third threshold) and then rise back to above the second threshold. At this time, through the Schmidt comparator, the boost module will not be directly disabled because the required voltage drops below the second threshold, so the boost enable state of the boost module will not be frequently switched due to the jitter of the required voltage, thereby achieving boost control while avoiding device losses caused by frequent switching of the boost enable state of the boost module.

[0122] At the same time, when the required voltage corresponding to the envelope signal is in a decreasing trend, the first Schmitt comparator also compares the required voltage corresponding to the envelope signal with the fourth threshold (Vbuck_open), thereby controlling the buck enable state of the buck module. The fourth threshold is less than the output voltage of the power supply. For example, the fourth threshold and the attribute voltage of the power supply may differ by a fourth difference. Figure 4c The middle dotted line is a schematic diagram of the relationship between the demand voltage (Vsigal) in the demand voltage reduction stage and the power supply voltage (Vbuck) output by the buck module. That is to say, before the demand voltage corresponding to the envelope signal drops to the fourth threshold, the first Schmitt comparator does not enable the buck module. After the demand voltage corresponding to the envelope signal drops to the first threshold, the buck module is enabled by the first control signal, and the buck module performs voltage reduction processing on the attribute voltage of the power supply.

[0123] It should be noted that Figure 4c and Figure 4d The scenario where the required voltage is constantly rising and falling is used as an example for explanation. In actual operation, due to the continuous change of the signal to be output, the required voltage is actually in the process of constantly alternating between rising and falling, that is, jittering. Based on this, in this embodiment, the fourth threshold is less than the first threshold through the Schmidt comparator, so that when the required voltage corresponding to the envelope signal jitters near the first threshold or the fourth threshold, the buck module will not be frequently enabled and disabled. For example, after the required voltage drops to the fourth threshold, the buck module is enabled, but the required voltage may suddenly rise above the fourth threshold (but not rise to the first threshold) and then fall back below the fourth threshold. At this time, through the Schmidt comparator, the buck module will not be directly disabled because the required voltage rises above the fourth threshold, so the buck enable state of the buck module will not be frequently switched due to the jitter of the required voltage, thereby achieving buck control while avoiding device loss caused by frequent switching of the buck enable state of the buck module.

[0124] It can be seen that in this embodiment, the enable control of the boost module and the buck module can be achieved through the Schmidt comparator. In this way, even if the output signal frequently jitters near the enable threshold or the disable threshold, the boost and buck control can be achieved while avoiding the boost module and the buck module from frequently switching between the enabled state and the disabled state, thereby reducing the device loss caused by frequent switching of the enabled state, thereby extending the service life of the module.

[0125] In other implementations, in this embodiment, four common types of signal comparators can also be used to implement enable control of the boost module and the buck module based on the first threshold, the second threshold, the third threshold and the fourth threshold mentioned above, so as to avoid frequent switching of the enable status of the boost module and the buck module.

[0126] For example, refer to Figure 4c and Figure 4d In this embodiment, when the demand voltage corresponding to the envelope signal is in a rising trend, the first comparator can be used to monitor whether the demand voltage corresponding to the envelope signal is less than the first threshold value (Vbuck_close). If so, the first comparator controls the buck module to be in a buck-enabled state. When the demand voltage corresponding to the envelope signal is greater than or equal to the first threshold value, the first comparator controls the buck module to be in a non-buck-enabled state; and the second comparator is used to monitor whether the demand voltage corresponding to the envelope signal reaches the second threshold value (Vboost_open). If so, the second comparator controls the boost module to be in a boost-enabled state.

[0127] For another example, in this embodiment, when the demand voltage corresponding to the envelope signal is in a continuously decreasing trend, a third comparator can be used to monitor whether the demand voltage corresponding to the envelope signal drops to a third threshold value (Vboost_close); if so, the third comparator controls the boost module to enter a non-boost enabled state; and a fourth comparator can be used to monitor whether the demand voltage corresponding to the envelope signal drops to a fourth threshold value (Vbuck_open); if so, the fourth comparator controls the buck module to be in a buck enabled state.

[0128] visible, Figure 4c and Figure 4d The scenario where the demand voltage is constantly rising and falling is used as an example for explanation. In actual operation, due to the continuous change of the signal to be output, the demand voltage is actually in a process of constantly alternating rise / fall, that is, jittering. Based on this, in this embodiment, the thresholds used by the four comparators are set to: the third threshold is less than the second threshold, and the fourth threshold is less than the first threshold. In this way, when the demand voltage corresponding to the envelope signal jitters near the first threshold or the fourth threshold, the buck module will not be frequently enabled and disabled. When the demand voltage corresponding to the envelope signal jitters near the second threshold or the third threshold, the boost module will not be frequently enabled and disabled. Thus, while achieving buck and boost control, the device loss caused by frequent switching of the enable state of the module can be avoided.

[0129] In one implementation, the power supply control device may further include: a synchronization processing module 0, such as Figure 5 As shown in , the synchronization processing module 0 is used to perform time alignment processing on the envelope signal and the output signal after the output signal is processed by the signal output device a.

[0130] That is to say, in this embodiment, the envelope signal and the output signal of the signal output device are aligned in time through the synchronization processing module 0, so that the enabling state of the boost module and the buck module can be controlled according to the envelope signal that more accurately represents the amplitude change of the signal to be output, thereby making it possible to more accurately control the enabling state of the buck module and the boost module.

[0131] In a specific implementation, the synchronization processing module 0 may be a delay module (delay), which is used to align the envelope signal and the output signal of the signal output device, so that the envelope signal can more accurately represent the amplitude change of the current signal to be output.

[0132] In one implementation, the envelope signal output by the signal processing module 1 may be a digital envelope signal. Based on this, the power supply control device in this embodiment may further include the following structure: Figure 6a As shown in:

[0133] The digital-to-analog conversion module 5 is connected to the signal processing module 1, and is used to convert the digital envelope signal into an analog envelope signal, and send the analog envelope signal to the buck module 3 and the control module 2. The control module 2 sends a first control signal to the buck module 3 according to the envelope signal to control the enabling state of the buck module.

[0134] Based on the above implementation, a synchronization processing module 0 is further deployed between the signal processing module 1 and the digital-to-analog conversion module 5, for synchronizing the envelope signal with the output signal of the signal output device a, such as Figure 6b The synchronous processing module 0 and the digital-to-analog conversion module 5 can be connected via an audio bus I2S (Inter-IC Sound).

[0135] In one implementation, the voltage reduction module 3 is further configured to adjust the voltage reduction parameters according to the analog envelope signal during the voltage reduction process of the output voltage output by the power supply.

[0136] The step-down parameter may be a parameter used by the step-down module 3 to enable the step-down processing function. The step-down module performs different step-down amplitudes on the output voltage of the power supply based on different step-down parameters. Since the envelope signal can represent the required voltage, the step-down module 3 in this embodiment can use the required voltage represented by the envelope signal as a reference voltage to perform step-down processing on the output voltage of the power supply, thereby ensuring that the power supply voltage obtained after the step-down matches the actual required voltage of the signal output device, and then transmits the power supply voltage obtained after the step-down to the signal output device a.

[0137] refer to Figure 7, is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application, wherein the electronic device includes a power supply control device e, a power supply b, and a signal output device a; wherein the power supply control device e may include the following structure:

[0138] The signal processing module 1 is used to obtain a signal to be output to a signal output device a of an external device, and perform a first process on the signal to be output to obtain an envelope signal, wherein the envelope signal represents an amplitude change of the signal to be output in a time dimension;

[0139] The control module 2 is connected to the signal processing module 1 and the voltage reduction module 3 respectively, and is used to output a first control signal according to the envelope signal, wherein the first control signal is used to control the working state of the voltage reduction module 3;

[0140] The voltage reduction module 3 is connected to the control module 2 and the power supply b, and is used to adjust the voltage reduction enabling state of the voltage reduction module 3 in response to the first control signal;

[0141] Among them, in the enabled state, the step-down module 3 enables the step-down processing function to step-down the output voltage output by the power supply b and transmits the power supply voltage output by the step-down module to the signal output device a; in the non-step-down enabled state, the step-down module 3 directly transmits the output voltage output by the power supply b to the signal output device a.

[0142] Through the above technical solution, it can be known that in an electronic device disclosed in an embodiment of the present application, the envelope signal of the signal to be output is obtained by the power supply control device to control the enable state of the step-down module. In the enabled state, the step-down module can start the step-down processing function to transmit the power supply voltage after the output voltage of the power supply is stepped down to the signal output device. This will not cause a higher power supply voltage to be transmitted to the signal output device, and will not cause a lot of power waste, thereby achieving the purpose of saving energy consumption.

[0143] In one implementation, the electronic device may further include the following structure: Figure 8 As shown in:

[0144] The power amplifier assembly includes a plurality of power amplifiers c, each of which is connected to the signal processing module 1, the voltage reduction module 3 and the control module 2 respectively; each power amplifier c includes a voltage boost module 4, and the voltage boost module 4 is connected to the control module 2 and the voltage reduction module 3 respectively;

[0145] The control module 2 is further used to output a second control signal according to the envelope signal, and the second control signal is used to control the boost enabling state of each boost module 4;

[0146] Among them, in the boost enabled state, the boost module 4 enables the boost processing function to boost the supply voltage transmitted by the buck module 3; in the non-boost enabled state, the boost module 4 directly transmits the supply voltage output by the buck module 3.

[0147] In one implementation, the control module 2 may include a first signal comparator 21 and a second signal comparator 22. Fig. 9 As shown in , the first signal comparator 21 and the second signal comparator 22 may be Schmidt comparators, that is, a first Schmidt comparator and a second Schmidt comparator.

[0148] The input end of the first Schmidt comparator is connected to the envelope signal output end of the signal processing module 1 , the output end of the first Schmidt comparator is connected to the step-down module 3 , and the first Schmidt comparator is used to output a first control signal.

[0149] The input end of the second Schmidt comparator is connected to the envelope signal output end of the signal processing module 1 , the output end of the second Schmidt comparator is connected to the boost module 4 , and the second Schmidt comparator is used to output a second control signal.

[0150] In one implementation, the power supply control device further includes: a synchronization processing module 0, such as Fig.10 As shown in , the synchronization processing module 0 is used to perform time alignment processing on the envelope signal and the output signal after the signal to be output is processed by the signal output device.

[0151] In one implementation, the envelope signal output by the signal processing module may be a digital envelope signal. Based on this, the power supply control device in this embodiment may further include the following structure: Fig.11 As shown in:

[0152] The digital-to-analog conversion module 5 is connected to the signal processing module 1, and is used to convert the digital envelope signal into an analog envelope signal, and send the analog envelope signal to the buck module 3 and the control module 2. The control module 2 sends a first control signal to the buck module 3 according to the envelope signal to control the enabling state of the buck module.

[0153] Based on the above implementation, a synchronization processing module 0 is further deployed between the signal processing module 1 and the digital-to-analog conversion module 5 for synchronizing the envelope signal with the output signal of the signal output device a, such as Fig.12 The synchronous processing module 0 and the digital-to-analog conversion module 5 can be connected via I2S.

[0154] refer to Fig.13 , is a flowchart of a power supply control method provided in an embodiment of the present application. The method can be applied to any power supply control device in the aforementioned embodiments. The method may include the following process:

[0155] Step 1301: Determine an envelope signal of a signal to be output to a signal output device.

[0156] The envelope signal represents the amplitude change of the signal to be output in the time dimension. In a specific implementation, the signal to be output includes multiple audio signals; the signal output device includes multiple power amplifiers, which are used to receive the audio signals of each channel respectively. The envelope signal can be the sum of the amplitude changes of the multiple audio signals output to the multiple power amplifiers in the same time dimension.

[0157] Step 1302: Output a first control signal according to the envelope signal, where the first control signal is used to control the buck enabling state of the buck module.

[0158] Among them, in the step-down enabled state, the step-down module enables the step-down processing function to step down the output voltage of the power supply output and transmits the power supply voltage output by the step-down module to the signal output device; in the non-step-down enabled state, the step-down module directly transmits the output voltage of the power supply output to the signal output device.

[0159] It can be known from the above technical scheme that in a power supply control method disclosed in an embodiment of the present application, the step-down enable state of the step-down module is controlled by obtaining the envelope signal of the signal to be output. In the enabled state, the step-down module can start the step-down processing function to transmit the power supply voltage after the output voltage of the power supply is stepped down to the signal output device. This will not cause a higher power supply voltage to be transmitted to the signal output device, and will not cause a lot of power waste, thereby achieving the purpose of saving energy consumption.

[0160] In one implementation, based on Figure 2 or Figure 3 The power supply control device shown in the embodiment may further include the following steps: Fig.14 As shown in:

[0161] Step 1303: output a second control signal according to the envelope signal, where the second control signal is used to control the boost enable state of the boost modules in each signal output device.

[0162] Among them, in the boost enabled state, the boost module enables the boost processing function to boost the supply voltage transmitted by the buck module; in the non-boost enabled state, the boost module directly transmits the supply voltage output by the buck module.

[0163] In one implementation, based on Figure 2 or Figure 3 The power supply control device shown in the embodiment may further include the following steps: Fig.15 As shown in:

[0164] Step 1304: Determine a required voltage based on the envelope signal.

[0165] In this embodiment, the required voltage can be determined by the amplitude change of the signal to be output represented by the envelope signal.

[0166] Step 1305: Based on the change trend and value of the required voltage, control the buck enable state of the buck module and the boost enable state of the boost module.

[0167] The change trend of the required voltage indicates that the required voltage is in an increasing stage or a decreasing stage, and the value of the required voltage indicates the value interval that the required voltage is in. Based on this, in this embodiment, the step-down module can be controlled to be in an enabled state or a disabled state and the step-up module can be controlled to be in an enabled state or a disabled state based on whether the required voltage is in an increasing stage or a decreasing stage and the value interval that the required voltage is in.

[0168] Taking the scenario where the signal comparator in the control module 2 is implemented by a Schmidt comparator as an example, combined with Fig.18 and Fig.19 The architecture diagram shown is as follows, when the required voltage is in the rising stage, an example of controlling the voltage reduction enable of the voltage reduction module and the voltage increase enable of the voltage increase module in step 1305 is shown:

[0169] If the required voltage represented by the envelope signal output by the signal processing module ① is in the rising stage and in the first interval, in step 1305, the step-down module ⑤ is controlled to be in the step-down enabled state through the Schmidt comparator ⑦ and the boost module ⑥ is controlled to be in the non-boost enabled state through the Schmidt comparator ⑧, thereby the step-down module ⑤ works to reduce the output voltage of the power supply output, and the boost module ⑥ only performs voltage transmission, and the power supply voltage output by the step-down module ⑤ follows the required voltage.

[0170] The voltage in the first interval is less than the output voltage of the power supply. For example, the first interval may be the interval from Vo_min to Vbuck_close. Fig.16a As shown in the figure, it is a schematic diagram of the relationship between the demand voltage (Vsigal) in the demand voltage rising stage and the supply voltage (Vbuck) output by the buck module, Vo_min can be a value greater than or equal to 0, Vbuck_close is a value less than V2s, and V2s is the rated working voltage of the power supply. Fig.16aIn the figure, the horizontal axis is the value of the required voltage Vsigal corresponding to the envelope signal, and the vertical axis is the supply voltage Vbuck obtained after the required voltage Vsigal is stepped down by the buck module when it is in the rising stage. That is to say, when the required voltage is in the rising stage but is in the interval less than Vbuck_close, it indicates that the output voltage of the power supply is too large, and the buck module is enabled to step down the output voltage, while the boost module does not start the boost processing function, so that the supply voltage output by the buck module can match the required voltage, thus achieving flexible control of the buck, that is, Fig.16a In the process that the required voltage rises from Vo_min to Vbuck_close, the voltage is bucked but not boosted. At this time, the power supply voltage Vbuck after being bucked by the buck module matches the required voltage Vsingal.

[0171] If the required voltage represented by the envelope signal output by the signal processing module ① is in the rising stage and in the second interval, in step 1305, the step-down module ⑤ is controlled by the Schmidt comparator ⑦ to be only used for voltage transmission, and the step-up module ⑥ is controlled by the Schmidt comparator ⑧ to be only used for voltage transmission, and the voltage in the second interval is greater than the voltage in the first interval.

[0172] The minimum voltage of the second interval is greater than the maximum voltage of the first interval. For example, the second interval may be the interval from vbuck-close to Vboost_open, where Vboost_open is less than V2s (the rated operating voltage of the two lithium batteries). Fig.16a Shown by the solid line. Fig.16a and subsequent Fig.16b The description is made by taking the case where the required voltage continuously rises / continuously falls as an example. However, in the actual working process, due to the continuous change of the audio signal, the required voltage is actually in the process of continuously alternating between rising / falling.

[0173] If the required voltage is in the rising stage and in the third interval, in step 1305, the step-down module ⑤ is controlled by the Schmidt comparator ⑦ to only transmit the voltage, and the step-up module ⑥ is controlled by the Schmidt comparator ⑧ to increase the supply voltage transmitted by the step-down module ⑤.

[0174] The value of the third interval is greater than the voltage of the second interval. For example, the third interval may be an interval greater than V2s. For example, the minimum value of the third interval is Vboost_open. Vboost_open is a value less than V2s. Fig.16b That is to say, when the required voltage continues to rise and rises to Vboost_open which is less than V2s, the boost module is enabled, and when the required voltage reaches V2s, the boost module enabled in advance boosts the power supply voltage transmitted by the buck module ⑤, thus achieving flexible control of the boost.

[0175] Taking the scenario where the signal comparator in the control module 2 is implemented by a Schmidt comparator as an example, combined with Fig.18 and Fig.19 The architecture diagram shown is as follows, when the required voltage is in the decreasing stage, an example of controlling the voltage reduction enable of the voltage reduction module and the voltage increase enable of the voltage increase module in step 1305 is shown:

[0176] If the required voltage represented by the envelope signal output by the signal processing module ① is in a decreasing stage and before reaching the first voltage value, in step 1305, the boost module ⑥ is controlled by the Schmidt comparator ⑧ to work, and the boost module ⑥ controls the output voltage of the power supply to boost the voltage, so that the power supply voltage transmitted by the boost module to the signal output device matches the required voltage, such as Fig.16b As shown by the dotted line in .

[0177] If the required voltage represented by the envelope signal output by the signal processing module ① is in a decreasing stage and reaches a first voltage value (corresponding to the third threshold value in the above text, i.e., Vboost_close), in step 1305, the boost module ⑥ is controlled to stop working by the Schmidt comparator ⑧ and only perform voltage transmission, and the buck module ⑤ is controlled to only perform voltage transmission by the Schmidt comparator ⑦. At this time, the power supply voltage provided to the signal output device is the output voltage of the power supply, i.e., V2s. Fig.16b Align the dashed line of V2s in the figure.

[0178] The first voltage value is located in the second interval, such as the interval from Vbuck-close to Vboost_open. For example, the first voltage value may be Vboost_close, and Vboost_close is less than Vboost_open. Fig.16b As shown in , it is a schematic diagram of the relationship between the required voltage (Vsigal) and the supply voltage (Vboost) output by the boost module in the required voltage drop stage, and Vo_min is a value greater than 0. Fig.16bIn the figure, the horizontal axis is the value of the demand voltage Vsigal corresponding to the envelope signal, and the vertical axis is the supply voltage Vboost boosted by the boost module when the demand voltage Vsigal is in the decreasing stage. That is to say, when the demand voltage starts to decrease from a higher interval, such as a value higher than V2s, and decreases to a value less than the first voltage value, such as Vboost_close, it indicates that the supply voltage transmitted by the buck module does not need to continue to be boosted. At the same time, the demand voltage has not dropped to the second voltage value that can enable the buck module, such as Vbuck_open, so there is no need to buck. At this time, the boost module is disabled and the buck module is not enabled. At this time, the boost module and the buck module only transmit the output voltage of the power supply, and provide the output voltage as the power supply voltage to the signal output device. That is to say, the 2S battery is provided to the signal output device through the buck module and the boost module at the rated working voltage, such as V2s.

[0179] It should be noted that Vboost_close is less than Vboost_open, so when the required voltage corresponding to the envelope signal jitters near Vboost_close or Vboost_open, the boost module will not be frequently switched between enabled and disabled through the Schmidt comparator. In this way, the boost enable state of the boost module will not be frequently switched due to the jitter of the required voltage, thereby achieving boost control while avoiding device loss caused by frequent switching of the boost enable state of the boost module.

[0180] If the required voltage is in the decreasing stage and drops below the second voltage value (corresponding to the fourth threshold value in the above text), in step 1305, the Schmidt comparator ⑦ controls the step-down module ⑤ to work to reduce the output voltage of the power supply, and the Schmidt comparator ⑧ controls the boost module ⑥ to only perform voltage transmission. At this time, the power supply voltage transmitted to the signal output device by the boost module matches the required voltage, such as Fig.16b The dotted line in .

[0181] The second voltage value is within the first interval, such as the interval from Vo_min to Vbuck_close. For example, the second voltage value may be Vbuck_open, such as Fig.16b As shown by the dotted line in , Vbuck-open is less than Vbuck-close at this time. That is to say, when the required voltage continues to drop and drops below the second voltage value Vbuck_open, it indicates that the output voltage of the power supply is too high. At this time, the buck module is enabled, while the boost module continues to be inoperative, so that the power supply voltage output by the buck module can match the required voltage, thus achieving flexible control of the buck.

[0182] It should be noted that Vbuck-open is smaller than Vbuck-close, so when the required voltage corresponding to the envelope signal fluctuates near Vbuck-open or Vbuck-close, the Schmitt comparator will not frequently switch the buck module between enabling and disabling. In this way, the buck enable state of the buck module will not be frequently switched due to the jitter of the required voltage, thereby achieving buck control while avoiding device loss caused by frequent switching of the boost enable state of the buck module.

[0183] In one implementation, before determining the required voltage based on the envelope signal in step 1304, the following processing may be performed. Fig.17 As shown in:

[0184] Step 1306: Time-align the envelope signal with the output signal of the signal to be output after being processed by the signal output device.

[0185] Specifically, in this embodiment, the envelope signal and the output signal of the signal output device are aligned through a synchronization processing module such as a delay module, so that the enable state of the boost module and the buck module can be controlled according to the envelope signal that more accurately represents the amplitude change of the signal to be output, thereby making it possible to be more accurate when controlling the enable state of the buck module and the boost module.

[0186] In one implementation, the method in this embodiment may further include the following processing:

[0187] The control step-down module adjusts the step-down parameters according to the analog envelope signal during the step-down process of the output voltage output by the power supply.

[0188] The step-down parameters may be parameters used by the step-down module to enable the step-down processing function, such as reference voltage and other parameters. The step-down module steps down the output voltage of the power supply according to the step-down parameters such as the reference voltage, and then transmits the power supply voltage obtained after the step-down to the signal output device through the boost module.

[0189] Taking the tablet device as an example, the power supply is a 2S battery containing two lithium batteries, based on the playback scenario of the audio signal, the technical solution of the present application is described below:

[0190] like Fig.18 and 19 As shown in , it is a schematic diagram of the structure of the improved power supply control architecture in the tablet device in this embodiment, which is as follows:

[0191] Firstly, in the new architecture of this embodiment, each smart power amplifier algorithm smart PA (Smart Power Amplifier) ​​is moved to the system on chip SOC (System on Chip) in the tablet device.

[0192] Based on this, after the algorithm module run by the digital signal processor DSP (Digital Signal Processing) in the SOC outputs each audio signal, the audio signal of each smart PA algorithm is input into module ① (i.e., the signal processing module 1 in the previous text) for signal envelope calculation, and the real-time maximum value of each audio signal is merged and output, and then passed through delay module ② (i.e., the synchronous processing module 0 in the previous text) and output to DAC module ④ (i.e., the digital-to-analog conversion module 5 in the previous text) through I2S interface ③. The output audio signal is input by the reference voltage ref of module ⑤ (i.e., the step-down module 3 in the previous text) to realize the step-down control of module ⑤.

[0193] Among them, the output voltage of the 2S battery output is provided to the module by the power management unit PMU (Power Management Unit)⑤.

[0194] Furthermore, module ⑤ is controlled by module ⑦ (i.e., the first Schmitt comparator in the previous text), so that module ⑤ is in an enabled state or a disabled state, such as Fig.18 The enabling state of module ⑤ is on, such as Fig.19 The module ⑤ is in the non-enabled state off, and the module ⑥ (i.e., the boost module 4 in the above text) is controlled by the module ⑧ (i.e., the second Schmitt comparator in the above text), so that the module ⑥ is in the enabled state or the non-enabled state, such as Fig.18 The disabled state of module ⑥ is off, such as Fig.19 The enable state of module ⑥ is on. Fig.16a and Fig.16b The relationship between the required voltage and the supply voltage is shown in the figure. The control logic of boost and buck is explained below:

[0195] A. Fig.18 As shown in , when the envelope value of the maximum signal to be output by the smart PA in the DSP is in the rising stage and in the first interval of (Vo_min, Vbuck_close), module ⑤ works (that is, the buck module is in the enabled state) and outputs the corresponding supply voltage to the digital power amplifier class-D. At this time, module ⑥ is in the bypass or disable mode (that is, the boost module is in the disabled state), so that the supply voltage Vbuck output by module ⑤ to module ⑥ (that is, the supply voltage Vboost output by module ⑥ to class-D) follows the input voltage, that is, the demand voltage Vsignal, as shown in Fig.16a as well as Fig.16b As shown in the implementation.

[0196] B. When the envelope value of the maximum output signal of the smart PA in the DSP is in the rising stage and in the interval of (Vbuck_close, Vboost_open), modules ⑤ and ⑥ are both in bypass or disable mode (that is, the buck module and the boost module are both in the disabled state), so that the power supply voltage Vbuck output by module ⑤ to module ⑥ is V2s, and the power supply voltage Vboost output by module ⑥ to class-D is also V2s. Fig.16a and Fig.16b as shown in .

[0197] C. Fig.19 As shown in , when the envelope value of the maximum output signal of the smart PA in the DSP is in the rising stage and in the interval of (Vboost_open, V2s), module ⑤ enters the bypass or disable mode (i.e., non-step-down enabled state), and module ⑥ starts the boost processing function. However, since the demand-side voltage is less than V2s, module 6 does not boost the voltage and outputs the corresponding supply voltage to class-D, so that the supply voltage Vbuck output by module ⑤ remains at V2s, and the supply voltage Vboost output by module ⑥ to class-D is also V2s, as shown in FIG. Fig.16a as well as Fig.16b Shown by the solid line.

[0198] D. Fig.19 As shown in , when the envelope value of the maximum output signal of the smart PA in the DSP is in the rising stage and in the interval of (V2s, Vo_max), module ⑤ is still in the bypass or disable mode, module ⑥ performs voltage boosting and outputs the corresponding supply voltage to class-D, so that the supply voltage Vboost output by module ⑥ follows the input voltage, and the supply voltage Vbuck output by module ⑤ is maintained at V2s, as shown in FIG. Fig.16a and Fig.16b As shown by the solid line in the middle, Vo_max can be an infinite value.

[0199] It should be noted that when the envelope value of the maximum signal to be output of the smart PA in the DSP is between Vbuck_close and Vboost_open, both modules ⑤ and ⑥ are in a disabled state; module ⑥ is enabled only after the envelope value of the maximum signal to be output of the smart PA in the DSP exceeds Vboost_open.

[0200] E. Fig.19As shown in , before the envelope value of the maximum signal to be output by the smart PA in the DSP is in the decreasing stage and reaches Vboost_close, module ⑤ is still in bypass or disable mode, module ⑥ is in boost enable state, and outputs the corresponding supply voltage to class-D, so that before the envelope value reaches V2s, the supply voltage Vboost output by module ⑥ follows the input voltage, after the envelope value reaches V2s and before reaching Vboost_close, the supply voltage Vboost output by ⑥ is V2s, and the supply voltage Vbuck output by module ⑤ is maintained at V2s, as shown in FIG. Fig.16a and Fig.16b Shown by the dashed line.

[0201] F. When the envelope value of the maximum output signal of the smart PA in the DSP is in the decreasing stage and reaches Vboost_close, module ⑥ enters the bypass or disable mode, and module ⑤ is still in the bypass or disable mode. At this time, the power supply voltage Vbuck output by module ⑤ to module ⑥ is V2s, and the power supply voltage Vboost output by module ⑥ to class-D is also V2s. Fig.16a and Fig.16b In this embodiment, Vboost_close is set to a value smaller than Vboost-open, which can avoid frequent switching of the enabling state of module ⑥ when the required voltage vsignal changes around Vbuck-open or Vboost_close during the audio signal change process.

[0202] G. Fig.18 As shown in , when the envelope value of the maximum output signal of the smart PA in the DSP is in the decreasing stage and reaches Vbuck_open, module ⑥ is still in bypass or disable mode, module ⑤ starts the buck processing function and outputs the corresponding supply voltage to class-D, so that the supply voltage Vbuck output by module ⑤ follows the input voltage, and the supply voltage Vboost output by module ⑥ also follows the input voltage, as shown in the figure Fig.16a and Fig.16b In this embodiment, Vbuck_open is set to a value smaller than Vbuck_close, which can avoid frequent switching of the enabling state of module ⑤ when the required voltage vsignal changes around Vbuck_open or Vbuck_close during the audio signal change process.

[0203] It should be noted that when the buck processing function of module ⑤ is not activated, the supply voltage output by module ⑤ is the output voltage of the 2S battery, that is, V2s. When the buck processing function of module ⑤ is activated, the supply voltage output by module ⑤ is the output voltage of the 2S battery after being stepped down by module ⑤, that is, Vbuck.

[0204] Among them, V1s represents the rated working voltage of a normal 1S battery. V2s represents the rated working voltage of a 2S battery. Vboost_open represents the enable voltage of the boost module during the voltage rise phase. Vboost_open is affected by the boost startup time. The shorter the startup time of the boost module, the larger the Vboost_open.

[0205] Vboost_close represents the shutdown (i.e. disabled) voltage of the boost module during the voltage drop stage. Vboost_close can be determined through debugging. The shorter the shutdown time of the boost module, the larger the Vboost_close.

[0206] Vbuck_open indicates the enable voltage of the buck module during the voltage drop stage, and Vbuck_open is determined by the maximum output voltage of the buck. Vbuck_close indicates the shutdown voltage of the buck module during the voltage rise stage, and Vbuck_close can be determined through debugging. The shorter the shutdown time of the buck module, the larger the Vbuck_close.

[0207] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0208] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0209] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0210] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power supply control device, comprising: A signal processing module, used for obtaining a signal to be output to a signal output device, and performing a first process on the signal to be output to obtain an envelope signal, wherein the envelope signal represents an amplitude change of the signal to be output in a time dimension; A control module, connected to the signal processing module and the voltage reduction module respectively, and configured to output a first control signal according to the envelope signal, wherein the first control signal is used to control an enabling state of the voltage reduction module; The voltage reduction module is connected to the control module and the power supply, and is used to adjust the voltage reduction enabling state of the voltage reduction module in response to the first control signal; Among them, in the step-down enabled state, the step-down module enables the step-down processing function to step-down the output voltage output by the power supply and transmits the power supply voltage output by the step-down module to the signal output device; in the non-step-down enabled state, the step-down module directly transmits the output voltage output by the power supply to the signal output device.

2. The power supply control device according to claim 1, wherein: The signal to be output includes multiple audio signals; the signal output device includes multiple power amplifiers for respectively correspondingly receiving each of the audio signals; The control module is further used to output a second control signal according to the envelope signal, wherein the second control signal is used to control the boost enable state of the boost modules in each of the power amplifiers, and each of the boost modules is respectively connected to the output end of the buck module; Among them, in the boost enabled state, the boost module enables the boost processing function to boost the supply voltage transmitted by the buck module; in the non-boost enabled state, the boost module directly transmits the supply voltage output by the buck module.

3. The power supply control device according to claim 2, wherein: The envelope signal is the sum of amplitude changes of the multi-channel audio signals output to the multiple power amplifiers in the same time dimension.

4. The power supply control device according to claim 2, wherein the control module is used for: When the envelope signal satisfies a first condition, outputting a first control signal to enable the voltage reduction module; the required voltage corresponding to the envelope signal represented by the first condition is less than the output voltage of the power supply; When the envelope signal satisfies a second condition, a second control signal enabling the boost module is output; the second condition indicates that the required voltage corresponding to the envelope signal is greater than the output voltage of the power supply.

5. The power supply control device according to claim 4, wherein the control module comprises a first Schmidt comparator and a second Schmidt comparator; in, The input end of the first Schmidt comparator is connected to the envelope signal output end of the signal processing module, the output end of the first Schmidt comparator is connected to the step-down module, and the first Schmidt comparator is used to output the first control signal; The input end of the second Schmidt comparator is connected to the envelope signal output end of the signal processing module, the output end of the second Schmidt comparator is connected to the boost module, and the second Schmidt comparator is used to output the second control signal.

6. The power supply control device according to claim 1, further comprising: The synchronization processing module is used to perform time alignment processing on the envelope signal and the output signal of the signal to be output after being processed by the signal output device.

7. The power supply control device according to claim 1, wherein the envelope signal is a digital envelope signal, and the power supply control device further comprises: A digital-to-analog conversion module, connected to the signal processing module, for converting the digital envelope signal into an analog envelope signal, and sending the analog envelope signal to the step-down module and the control module; The voltage reduction module is further used to adjust the voltage reduction parameters according to the analog envelope signal during the voltage reduction process of the output voltage output by the power supply.

8. An electronic device, comprising a power supply control device, the power supply control device comprising: A signal processing module, used for obtaining a signal to be output to a signal output device of an external device, and performing a first process on the signal to be output to obtain an envelope signal, wherein the envelope signal represents an amplitude change of the signal to be output in a time dimension; A control module, connected to the signal processing module and the voltage reduction module respectively, and configured to output a first control signal according to the envelope signal, wherein the first control signal is used to control the working state of the voltage reduction module; The voltage reduction module is connected to the control module and the power supply, and is used to adjust the voltage reduction enabling state of the voltage reduction module in response to the first control signal; Among them, in the step-down enabled state, the step-down module enables the step-down processing function to step-down the output voltage output by the power supply and transmits the power supply voltage output by the step-down module to the signal output device; in the non-step-down enabled state, the step-down module directly transmits the output voltage output by the power supply to the signal output device.

9. The electronic device according to claim 8, further comprising: A power amplifier assembly, comprising a plurality of power amplifiers, each of which is respectively connected to the signal processing module, the voltage reduction module and the control module; each of the power amplifiers comprises a voltage boost module, which is respectively connected to the control module and the voltage reduction module; The control module is further used to output a second control signal according to the envelope signal, wherein the second control signal is used to control the boost enable state of each of the boost modules; Among them, in the boost enabled state, the boost module enables the boost processing function to boost the supply voltage transmitted by the buck module; in the non-boost enabled state, the boost module directly transmits the supply voltage output by the buck module.

10. A power supply control method, comprising: Determine an envelope signal of a signal to be output to a signal output device, wherein the envelope signal represents an amplitude change of the signal to be output in a time dimension; Outputting a first control signal according to the envelope signal, wherein the first control signal is used to control a buck enabling state of the buck module; Among them, in the step-down enabled state, the step-down module enables the step-down processing function to step-down the output voltage of the power supply output and transmits the power supply voltage output by the step-down module to the signal output device; in the non-step-down enabled state, the step-down module directly transmits the output voltage output by the power supply to the signal output device.

11. The power supply control method according to claim 10, further comprising: Outputting a second control signal according to the envelope signal, wherein the second control signal is used to control a boost enabling state of a boost module in each signal output device; Among them, in the boost enabled state, the boost module enables the boost processing function to boost the supply voltage transmitted by the buck module; in the non-boost enabled state, the boost module directly transmits the supply voltage output by the buck module.

12. The power supply control method according to claim 11, further comprising: determining a required voltage based on the envelope signal; Based on the change trend and value of the required voltage, the buck enabling state of the buck module and the boost enabling state of the boost module are controlled.

13. The power supply control method according to claim 12, wherein the step of controlling the step-down enabling state of the step-down module and the step-up enabling state of the step-up module based on the change trend and value of the required voltage comprises: If the required voltage is in the rising stage and in the first interval, the step-down module is controlled to work to reduce the output voltage of the power supply output, and the step-up module is controlled to only perform voltage transmission; the voltage in the first interval is less than the output voltage of the power supply output; If the required voltage is in the rising stage and in the second interval, the step-down module and the step-up module are controlled to be used only for voltage transmission, and the voltage in the second interval is greater than the voltage in the first interval; If the required voltage is in the rising stage and in the third interval, the step-down module is controlled to only perform voltage transmission, and the step-up module is controlled to work to increase the supply voltage transmitted by the step-down module, and the value of the third interval is greater than the voltage of the second interval.

14. The power supply control method according to claim 13, controlling the buck enabling state of the buck module and the boost enabling state of the boost module based on the change trend and value of the required voltage, comprising: If the required voltage is in a decreasing stage and reaches below a first voltage value, the boost module is controlled to stop working and only perform voltage transmission, and the buck module is controlled to only perform voltage transmission, and the first voltage value is within the second interval; If the required voltage is in a decreasing stage and drops below a second voltage value, the voltage reduction module is controlled to operate to reduce the output voltage of the power supply, and the second voltage value is within the first interval.

15. The power supply control method according to claim 12, before determining the required voltage based on the envelope signal, further comprising: The envelope signal and the output signal of the signal to be output processed by the signal output device are time-aligned.

16. The power supply control method according to claim 10, further comprising: The step-down module is controlled to adjust the step-down parameters according to the envelope signal during the step-down process of the output voltage output by the power supply.

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