A power supply control device, an electronic device, and a power supply control method

Abstract

The application discloses a power supply control device, an electronic device and a power supply control method, and relates to power supply control technology, and comprises a signal processing module, a control module and a step-down module.The signal processing module is used for obtaining a to-be-output signal, and performing first processing on the to-be-output signal to obtain an envelope signal, wherein the envelope signal represents amplitude variation of the to-be-output signal in a time dimension.The control module is connected with the signal processing module and the step-down module respectively, and is used for outputting a first control signal according to the envelope signal, wherein the first control signal is used for controlling an enabling state of the step-down module.The step-down module is connected with the control module and a power supply, and is used for adjusting a step-down enabling state of the step-down module in response to the first control signal.In the step-down enabling state, the step-down module enables a step-down processing function to perform step-down processing on an output voltage output by the power supply, and transmits the step-down module output power supply voltage to a signal output device.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 particularly to a power supply control device, an electronic device and a power supply control method. BACKGROUND

[0002] The current intelligent power amplifier can realize the optimization of efficiency in combination with its own boost circuit. Taking the audio external scene as an example, the intelligent power amplifier in the general external scene has a working voltage of about 4V, at which time the boost circuit basically does not need to be started; as the working voltage rises, the boost circuit is started to realize voltage boosting to meet the output demand of the intelligent power amplifier.

[0003] Since the power supply design of the subsequent electronic device includes multiple lithium batteries, currently two lithium batteries, i.e. 2S batteries, are usually used, which makes the battery supply voltage a series voltage of multiple lithium batteries. The power demand of the external signal output device, such as the power amplifier in the external scene, is still high, and if a higher supply voltage is used, it will cause a great waste of power, so a new power supply architecture and power supply method need to be designed. SUMMARY

[0004] Therefore, the present application provides the following technical solutions:

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

[0006] A signal processing module, configured to obtain a to-be-output signal to be output to a signal output device, and perform first processing on the to-be-output signal to obtain an envelope signal, the envelope signal representing the amplitude variation of the to-be-output signal in the time dimension;

[0007] A control module, connected with the signal processing module and the voltage reduction module respectively, configured to output a first control signal according to the envelope signal, the first control signal being used to control the enable state of the voltage reduction module;

[0008] The voltage reduction module, connected with the control module and a power supply, configured to adjust the voltage reduction enable state of the voltage reduction module in response to the first control signal;

[0009] In the voltage reduction enable state, the voltage reduction module enables the voltage reduction processing function to perform voltage reduction processing on the output voltage output by the power supply and transmit the supply voltage output by the voltage reduction module to the signal output device; in the non-voltage reduction enable state, the voltage reduction module directly transmits the output voltage output by the power supply to the signal output device. In one possible implementation, the to-be-output signal includes multiple audio signals; the signal output device includes multiple power amplifiers, configured to respectively receive each of the audio signals.

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

[0011] In the boost enable state, the boost module enables a boost processing function to boost the power supply voltage transmitted by the buck module; and in the non-boost enable state, the boost module directly transmits the power supply voltage output by the buck module.

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

[0013] In one possible implementation, the control module is configured to:

[0014] When the envelope signal satisfies a first condition, a first control signal enabling the buck module is output; the envelope signal corresponding to the first condition represents a demand voltage less than an 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 represents that the envelope signal corresponding to the second condition represents a demand voltage greater than the output voltage of the power supply.

[0016] In one possible implementation, the control module includes a first Schmitt comparator and a second Schmitt comparator.

[0017] The input end of the first Schmitt comparator is connected to an envelope signal output end of the signal processing module, the output end of the first Schmitt comparator is connected to the buck module, and the first Schmitt comparator is configured to output the first control signal.

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

[0019] In one possible implementation, the control module further includes:

[0020] A synchronization processing module is configured to perform time alignment processing on the envelope signal and an output signal of the signal output device after processing the signal to be output.

[0021] In one 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 with the signal processing module, configured to convert the digital envelope signal into an analog envelope signal and send the analog envelope signal to the voltage reduction module and the control module;

[0023] The voltage reduction module is further configured to adjust a voltage reduction parameter according to the analog envelope signal during the voltage reduction process on the output voltage output by the power supply.

[0024] The second aspect of the present application provides an electronic device comprising a power supply control device, which comprises:

[0025] a signal processing module, configured to obtain a to-be-output signal of a signal output device to be output to an external device, and perform a first processing on the to-be-output signal to obtain an envelope signal, the envelope signal representing a magnitude variation of the to-be-output signal in a time dimension;

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

[0027] The voltage reduction module is connected with the control module and the power supply, and is configured to adjust a voltage reduction enable state of the voltage reduction module in response to the first control signal.

[0028] In the voltage reduction enable state, the voltage reduction module enables a voltage reduction processing function to perform voltage reduction processing on the output voltage output by the power supply and transmit a power supply voltage output by the voltage reduction module to the signal output device; in the non-voltage reduction enable state, the voltage reduction module directly transmits the output voltage output by the power supply to the signal output device.

[0029] In one possible implementation, the electronic device further comprises:

[0030] a power amplifier combination comprising a plurality of power amplifiers, each of the power amplifiers being connected with the signal processing module, the voltage reduction module and the control module respectively; each of the power amplifiers comprising a voltage increase module, the voltage increase module being connected with the control module and the voltage reduction module respectively;

[0031] The control module is further configured to output a second control signal according to the envelope signal, the second control signal being used to control a voltage increase enable state of each of the voltage increase modules.

[0032] In the voltage increase enable state, the voltage increase module enables a voltage increase processing function to perform voltage increase processing on the power supply voltage transmitted by the voltage reduction module; in the non-voltage increase enable state, the voltage increase module directly transmits the power supply voltage output by the voltage reduction module.

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

[0034] determining an envelope signal of a to-be-output signal to be output to a signal output device, the envelope signal representing amplitude variation of the to-be-output signal in a time dimension;

[0035] outputting a first control signal according to the envelope signal, the first control signal being used to control a buck enable state of a buck module;

[0036] wherein, in the buck enable state, the buck module enables a buck processing function to perform buck processing on an output voltage output by a power supply and transmits the power voltage output by the buck module to the signal output device; in a non-buck enable state, the buck module directly transmits the output voltage output by the power supply to the signal output device.

[0037] In one possible implementation, the method further comprises:

[0038] outputting a second control signal according to the envelope signal, the second control signal being used to control a boost enable state of a boost module in each signal output device;

[0039] wherein, in the boost enable state, the boost module enables a boost processing function to perform boost processing on the power voltage transmitted by the buck module; in a non-boost enable state, the boost module directly transmits the power voltage output by the buck module.

[0040] In one possible implementation, the method further comprises:

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

[0042] controlling the buck enable state of the buck module and the boost enable state of the boost module based on a variation trend and a value of the required voltage.

[0043] In one possible implementation, the controlling the buck enable state of the buck module and the boost enable state of the boost module based on the variation trend and the value of the required voltage comprises:

[0044] if the required voltage is in an ascending phase and in a first interval, controlling the buck module to work to reduce the output voltage output by the power supply and controlling the boost module to only perform voltage transmission; the voltage of the first interval is less than the output voltage output by the power supply;

[0045] if the demand voltage is in the rising stage and in the second interval, controlling the buck module and the boost module to only perform voltage transmission, and the voltage of the second interval is greater than the voltage of the first interval;

[0046] if the demand voltage is in the rising stage and in the third interval, controlling the buck module to only perform voltage transmission, and controlling the boost module to work to increase the supply voltage output by the buck module, and the value of the third interval is greater than the voltage of the second interval.

[0047] In one possible implementation, the controlling of the buck enable state of the buck module and the boost enable state of the boost module based on the change trend and value of the demand voltage comprises:

[0048] if the demand voltage is in the falling stage and reaches below a first voltage value, controlling the boost module to stop working and only perform voltage transmission, and controlling the buck module to only perform voltage transmission, and the first voltage value is in the second interval;

[0049] if the demand voltage is in the falling stage and falls below a second voltage value, controlling the buck module to work to decrease the output voltage output by the power supply, and the second voltage value is in the first interval.

[0050] In one possible implementation, before the determining of the demand voltage based on the envelope signal, the method further comprises:

[0051] performing time alignment processing on the envelope signal and the output signal of the signal output device after processing of the to-be-output signal.

[0052] In one possible implementation, the method further comprises:

[0053] controlling the buck module to adjust a buck parameter during the buck processing of the output voltage output by the power supply according to the envelope signal.

[0054] According to the technical solution, the application discloses a power supply control device, an electronic device and a power supply control method. The buck enable state of the buck module is controlled by obtaining the envelope signal of the to-be-output signal. The buck module can start the buck processing function to transmit the bucked supply voltage to the signal output device in the buck enable state. Thus, the high supply voltage is not transmitted to the signal output device, and great power waste is avoided. Therefore, the energy consumption is saved. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only need to be drawn for the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

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

[0057] Figure 2 A structural schematic diagram of a power supply control device provided by an embodiment of the present application; Figure 3 A structural schematic diagram of a power supply control device provided by an embodiment of the present application;

[0058] Figure 4a A structural schematic diagram of a power supply control device provided by an embodiment of the present application;

[0059] Figure 4b A structural schematic diagram of a power supply control device provided by an embodiment of the present application;

[0060] Figure 4c A structural schematic diagram of a power supply control device provided by an embodiment of the present application;

[0061] Figure 4d A structural schematic diagram of a power supply control device provided by an embodiment of the present application;

[0062] Figure 5 A structural schematic diagram of a power supply control device provided by an embodiment of the present application; Figure 6a A structural schematic diagram of a power supply control device provided by an embodiment of the present application; Figure 6b A structural schematic diagram of a power supply control device provided by an embodiment of the present application;

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

[0064] Figure 8 A structural schematic diagram of an electronic device provided by an embodiment of the present application; Figure 9 A structural schematic diagram of an electronic device provided by an embodiment of the present application; Figure 10 A structural schematic diagram of an electronic device provided by an embodiment of the present application; Figure 11 A structural schematic diagram of an electronic device provided by an embodiment of the present application; Figure 12 A structural schematic diagram of an electronic device provided by an embodiment of the present application;

[0065] Figure 13 A flowchart of a power supply control method provided by an embodiment of the present application;

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

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

[0068] Figure 16a A schematic diagram of the relationship between the demand voltage and the power supply voltage output by the voltage reduction module in the rising phase and the falling phase of the demand voltage in an embodiment of the present application;

[0069] Figure 16b A schematic diagram of the relationship between the demand voltage and the power supply voltage output by the voltage reduction module in the rising phase and the falling phase of the demand voltage in an embodiment of the present application;

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

[0071] Figure 18 A schematic diagram of enabling voltage reduction in a power supply control architecture applicable to a tablet device in an embodiment of the present application;

[0072] Figure 19 A schematic diagram of enabling voltage reduction in a power supply control architecture applicable to a tablet device in an embodiment of the present application. DETAILED DESCRIPTION

[0073] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0074] Reference Figure 1 A structural schematic diagram of a power supply control device provided by 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 the present embodiment is mainly used to reduce the power consumption of the electronic device.

[0075] Specifically, the power supply control device in the present embodiment can include the following structures:

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

[0077] The envelope signal represents a magnitude variation of the to-be-output signal in a time dimension. The first processing is envelope calculation processing.

[0078] In an implementation manner, the to-be-output signal can include multiple audio signals, and the signal output apparatus a can be an apparatus capable of outputting audio signals. For example, the signal output apparatus a can be a low-frequency loudspeaker or a high-frequency loudspeaker.

[0079] In another implementation manner, the to-be-transmitted signal can include multiple video signals, and the signal output apparatus a can be a graphics card apparatus capable of outputting video signals. The graphics card apparatus is connected to a display, and the graphics card apparatus renders a video picture into the display for output.

[0080] Taking the signal output apparatus a as an apparatus capable of outputting audio signals as an example, in a specific implementation, the signal output apparatus a can include multiple power amplifiers (PAs). The power amplifier is used to correspondingly receive each audio signal, so as to perform power amplification processing on the audio signal, and to output the audio signal.

[0081] In an implementation manner, the envelope signal is a sum of magnitude variations of the multiple audio signals output to the multiple power amplifiers in the same time dimension.

[0082] In a specific implementation, the envelope signal calculation method can be used to perform envelope calculation on the multiple audio signals, that is, to obtain a sum of magnitude variations in the same time dimension by merging real-time maximum values of the multiple audio signals, so as to obtain the envelope signal.

[0083] The voltage reduction module 3 is configured to perform voltage reduction processing on an output voltage output by the power supply or bypass the output voltage. The power supply b is configured 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 configured to output a first control signal according to the envelope signal. The first control signal is used to control a voltage reduction enable state of the voltage reduction module 3.

[0085] In the envelope signal satisfies a first condition, the control module 2 is configured to output the first control signal enabling the voltage reduction module 3. The first condition represents that a required voltage corresponding to the envelope signal 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 can include multiple lithium batteries, such as a 2S battery. That is, the control module 2 compares the demand voltage corresponding to the envelope signal with the output voltage of the power supply. If the demand 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 voltage reduction module 3. The voltage reduction module 3 can perform voltage reduction processing on the output voltage of the power supply in the voltage reduction enabled state. After voltage reduction, the power supply voltage output by the voltage reduction module is transmitted to the signal output device a. If the demand 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. At this time, there is no need for voltage reduction. At this time, the control module 2 can output a control signal to stop voltage reduction to disable the voltage reduction module 3. The voltage reduction module 3 does not perform voltage reduction processing on the output voltage of the power supply. The voltage reduction 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 with the control module 2 and the power supply b, and is used to adjust the voltage reduction enable state of the voltage reduction module 3 in response to the first control signal.

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

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

[0090] That is, in the embodiment, the first control signal output by the control module enables the voltage reduction module. That is, whether voltage reduction processing needs to be performed on the output voltage of the power supply is determined based on the envelope signal representing the amplitude change of the signal to be output. If voltage reduction needs to be performed on the output voltage, the voltage reduction module is enabled. The output voltage of the voltage reduction module is transmitted to the signal output device after voltage reduction. If voltage reduction is not needed, the voltage reduction module is bypassed. The voltage reduction module directly transmits the output voltage of the power supply to the signal output device, thereby realizing flexible control of voltage reduction.

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

[0092] Via the technical solution, the power supply control device can obtain the envelope signal of the to-be-output signal to control the buck enable state of the buck module, and the buck module can start the buck processing function to transmit the bucked power supply voltage to the signal output device in the buck enable state, so that the higher voltage is not transmitted to the signal output device, and the power waste is avoided, thereby achieving the purpose of saving energy consumption.

[0093] Further, the envelope signal can represent the amplitude change of the to-be-output signal in the time dimension, and thus, 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 by the envelope signal, so that the buck enable state of the buck module is controlled in real time based on the amplitude change of the required voltage, and thus, the buck module can be enabled more accurately, thereby improving the accuracy of the buck control.

[0094] In an implementation manner, the signal output device a includes a plurality of power amplifiers c, and each power amplifier c is configured to correspond to each audio signal in the to-be-output signal. Figure 2 After the power amplifier c performs the power amplification processing on the audio signal, the power amplifier c transmits the audio signal to the corresponding audio output unit d, such as a loudspeaker.

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

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

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

[0098] That is, the second control signal output by the control module in the embodiment enables the boost 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 output voltage of 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 output voltage of the power supply is stepped down by the step-down module in advance before being transmitted to the signal output device through the boost module. If the output voltage of the power supply does not need to be stepped down, the step-down module is bypassed or the step-down parameter of the step-down module is adjusted so that it does not produce a step-down effect. The output voltage of the power supply becomes the supply voltage after passing through the step-down module and is transmitted to the boost module. If the supply voltage transmitted by the step-down module needs to be stepped up, the boost module is enabled, and the supply voltage transmitted by the step-down module is stepped up by the boost module before being transmitted to the signal output device. If no step-up is needed, the boost module is bypassed or the step-up parameter of the boost module is adjusted so that it does not produce a step-up effect. The supply voltage transmitted by the step-down module is directly transmitted to the signal output device by the boost module, thereby achieving flexible control of step-down and step-up.

[0099] It should be noted that when the boost module performs step-up processing on the supply voltage transmitted by the step-down module, the step-up amplitude of the boost module to the supply voltage transmitted by the step-down module can be determined based on the load demand of the signal output device.

[0100] Based on the above implementation, when the envelope signal satisfies the second condition, the control module 2 is configured to output a second control signal enabling the boost module 4. The demand voltage corresponding to the envelope signal represented by the second condition is greater than the output voltage of the power supply.

[0101] In other words, 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 supply voltage transmitted by the buck module (when the buck module does not step down the output voltage, the 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, control signal 2 outputs a second control signal to enable boost module 4. Boost module 4 can boost the supply voltage transmitted by the buck module when boost enabled. At the same time, control module 2 will not output the first control signal, that is, it will not enable buck module 3. At this time, the buck function of buck module 3 is not effective, and the output voltage of the power supply is directly transmitted to boost module 4. However, if the required voltage corresponding to the envelope signal is less than or equal to the supply voltage transmitted by the buck module, then it can be determined that the envelope signal does not meet the second condition. At this time, boosting is not required. Control module 2 can output a control signal to stop boosting to disable boost module 4. Boost module 4 will not boost the supply voltage transmitted by the buck module.

[0102] Furthermore, if control module 2 determines that the required voltage corresponding to the envelope signal is equal to the output voltage of the power supply, then control module 2 will not output the first control signal, meaning it will not enable buck module 3. In this case, buck module 3 will not perform voltage reduction processing on the output voltage of the power supply, and boost module 4 will not perform voltage boost processing on the power supply voltage transmitted by the buck module; that is, it neither boosts nor reduces voltage. However, if control module 2 determines that the required voltage corresponding to the envelope signal is less than the output voltage of the power supply, then control module 2 will output the first control signal, meaning it will enable buck module 3. In this case, buck module 3 will perform voltage reduction processing on the output voltage of the power supply, and boost module 4 will not perform voltage boost processing on the power supply voltage transmitted by the buck module; that is, it neither boosts nor reduces voltage.

[0103] In one implementation, the control module 2 may include a first signal comparator 21 and a second signal comparator 22. For example... Figure 3 As shown, the input terminal of the first signal comparator 21 is connected to the envelope signal output terminal of the signal processing module 1, and the output terminal 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, then 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 of the second signal comparator 22 is connected to the envelope signal output of the signal processing module 1, and the output 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 supply voltage transmitted by the buck module. If the required voltage corresponding to the envelope signal is greater than the supply voltage transmitted by the buck module (when the buck module does not step down the output voltage, the 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 can be Schmitt comparators; in other implementations, the first signal comparator 21 and the second signal comparator 22 can also be other types of signal comparators.

[0106] Taking the first signal comparator 21 and the second signal comparator 22 as examples, which are both ordinary type signal comparators, such as... Figure 4a The solid line in the diagram illustrates the relationship between the demand voltage (Vsigal) and the supply voltage (Vbuck) output by the buck module during the rising phase. When the demand voltage corresponding to the envelope signal is continuously increasing, the first signal comparator determines that the envelope signal meets a first condition if the demand voltage is less than the output voltage of the power supply. At this point, the first signal comparator outputs a first control signal, enabling the buck module to step down the power supply's output voltage before the envelope signal reaches its maximum. Simultaneously, the second comparator outputs a control signal to disable boosting; without enabling the boost module, it does not operate. Therefore, as the demand voltage continuously rises, the buck module's step-down function reduces the power supply's output voltage, resulting in a supply voltage that matches the demand voltage after passing through both the buck and boost modules.

[0107] Furthermore, as the demand voltage continues to rise, when the demand voltage reaches the output voltage of the power supply (such as the rated operating voltage V2s of a 2S battery), the first signal comparator determines that the demand 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 to prohibit bucking. Thus, when the envelope signal continues to rise and reaches the output voltage of the power supply, the buck module is not enabled and does not work. At the same time, the second comparator outputs a control signal to prohibit boosting, which disables the boost module and does not work. Accordingly, after passing through the buck module and the boost module, the power supply voltage provided to the signal output device can match the demand voltage, that is, the output voltage of the power supply.

[0108] Furthermore, such as Figure 4b The solid line in the diagram illustrates the relationship between the demand voltage (Vsigal) and the supply voltage (Vboost) output by the boost module during the rising phase. As the demand voltage continues to rise, it exceeds the output voltage of the power supply. 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 to disable buck conversion, thus enabling the buck module. The buck module does not perform buck conversion 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. Simultaneously, 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. The boost module boosts the output voltage of the power supply (i.e., the supply voltage transmitted from the buck module to the boost module). Thus, as the demand voltage continues to rise, the boost module's boost function boosts the output voltage of the power supply. Consequently, the supply voltage provided to the signal output device after passing through the buck module and the boost module matches the demand voltage.

[0109] Taking the first signal comparator 21 and the second signal comparator 22 as examples, which are both ordinary type signal comparators, such as... Figure 4b The dashed line in the diagram illustrates the relationship between the demand voltage (Vsigal) and the supply voltage (Vboost) output by the boost module during the decreasing phase. 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 comparator outputs a second control signal to enable the boost module, which then boosts the output voltage. Simultaneously, the first comparator determines that the demand voltage corresponding to the envelope signal is greater than the output voltage of the power supply, and outputs a control signal to disable buck conversion. Without enabling the buck module, the buck module does not buck the output voltage of the power supply. Therefore, even when the demand voltage is higher than the output voltage of the power supply, and the demand voltage continues to decrease, the boost module's boost function can be used to boost the output voltage of the power supply. Consequently, the supply voltage provided to signal output device a after passing through the buck and boost modules can match the demand voltage.

[0110] Further, as the demand voltage continues to decrease, when the demand voltage reaches the output voltage of the power supply (such as the rated working voltage V2s of the 2S battery), the second comparator determines that the demand voltage corresponding to the envelope signal is equal to the output voltage of the power supply, and outputs a control signal to disable the boost, thereby disabling the boost module, and the boost module no longer performs the boost process. At the same time, the first signal comparator determines that the demand voltage corresponding to the envelope signal is equal to the output voltage of the power supply, and outputs a control signal to disable the buck, thereby disabling the buck module, and the buck module does not perform the buck process on the output voltage of the power supply. In this way, when the envelope signal continues to decrease to the output voltage of the power supply, the buck module does not perform the buck process on the output voltage of the power supply, and the boost module does not perform the boost process on the supply voltage transmitted by the buck module.

[0111] Further, as shown by the dashed line in Figure 4a , a schematic diagram of the relationship between the demand voltage (Vsigal) and the supply voltage (Vbuck) output by the buck module in the decreasing phase of the demand voltage (Vsigal), as the demand voltage continues to decrease, the demand voltage is less than the output voltage of the power supply, and the first signal comparator determines that the envelope signal satisfies 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 after the envelope signal continues to decrease to less than the output voltage of the power supply, the buck module is enabled to perform the buck process on the output voltage of the power supply, and the second comparator outputs a control signal to disable the boost, thereby disabling the boost module, and the boost module does not perform the boost process on the supply voltage transmitted by the buck module. Therefore, as the demand voltage continues to decrease, the buck function of the buck module is utilized in time to reduce the output voltage, and accordingly, the supply voltage provided to the signal output device after passing through the buck module and the boost module can match the demand voltage.

[0112] As can be seen, the ordinary type of signal comparator can enable and disable the boost module and the buck module in time through single threshold (output voltage of the power supply) comparison, so as to perform the boost and buck processes on the output voltage of the power supply in real time, and make the supply voltage provided to the signal output device continuously follow the demand voltage.

[0113] It should be noted that the boost module 4 and the buck module 3 can not be in the enabled state at the same time, or the boost module 4 and the buck module 3 can be in the enabled state at the same time. 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 demand voltage corresponding to the envelope signal is greater than the supply voltage transmitted by the buck module. The buck module 3 in the power-on state starts the buck processing function only when the demand 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 examples of Schmidt comparators, the control module 2 can 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, and the output end of the first Schmidt comparator is connected to the buck module 3. The first Schmidt comparator is used to output a first control signal.

[0115] For example, the first Schmidt comparator compares the demand voltage corresponding to the envelope signal with the output voltage of the power supply. If the demand voltage corresponding to the envelope signal is less than the output voltage of the power supply, it can be determined that the envelope signal satisfies the first condition. At this time, the first Schmidt comparator outputs the 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, and the output end of the second Schmidt comparator is connected to the boost module 4. The second Schmidt comparator is used to output a second control signal.

[0117] For example, the second Schmidt comparator compares the demand voltage corresponding to the envelope signal with the output voltage of the power supply. If the demand voltage corresponding to the envelope signal is greater than the supply voltage transmitted by the buck module (in the case where the buck module does not reduce the output voltage, the supply voltage transmitted by the buck module is the output voltage of the power supply), it can be determined that the envelope signal satisfies the second condition. At this time, the second Schmidt comparator outputs the second control signal to enable the boost module.

[0118] In one scenario, the demand voltage corresponding to the envelope signal starts from the minimum stage. When the demand voltage corresponding to the envelope signal is in a rising trend, the first Schmidt comparator compares the demand voltage corresponding to the envelope signal with a 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 can be different from the output voltage by the first threshold. For example, the first threshold is 0.1V, and the output voltage of the power supply is 5V. When the demand voltage corresponding to the envelope signal is less than 5.1V, the first Schmidt comparator outputs the first control signal to enable the buck module. Figure 4cThe middle solid line shows the relationship between the demand voltage (Vsigal) and the supply voltage (Vbuck) output by the buck module in the demand voltage rising stage, that is, the first Schmidt comparator determines that the envelope signal meets the first condition when the demand voltage corresponding to the envelope signal is less than the first threshold value, at this time, the first Schmidt comparator outputs the first control signal, so that the buck module is in the buck enable state before the demand voltage corresponding to the envelope signal continuously rises to the first threshold value, and the buck module performs buck processing on the output voltage of the power supply to make the supply voltage transmitted by the buck module to the boost module match the demand voltage. And when the demand voltage corresponding to the envelope signal continuously rises to the first threshold value, the buck module is disabled, that is, it enters the non-buck enable state, and the buck module does not perform buck processing on the output voltage of the power supply, and 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 demand voltage corresponding to the envelope signal is in the trend of continuously rising, the second Schmidt comparator compares the second threshold value (Vboost_open) with the demand voltage corresponding to the envelope signal, thereby enabling the boost module. The enabled boost module can perform boost processing on the output voltage of the power supply in time after the demand voltage corresponding to the envelope signal exceeds the output voltage of the power supply. The second threshold value is less than the output voltage of the power supply, for example, the second threshold value and the attribute voltage of the power supply can differ by a second difference. For example, Figure 4d The middle solid line shows the relationship between the demand voltage (Vsigal) and the supply voltage (Vboost) output by the buck module in the demand voltage rising stage. That is, when the demand voltage corresponding to the envelope signal continuously rises and reaches the second threshold value before the demand voltage corresponding to the envelope signal reaches the output voltage of the power supply, 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 the boost module is enabled when the demand voltage corresponding to the envelope signal continuously rises to the second threshold value, and then, when the demand voltage continuously rises and rises to exceed the supply voltage (that is, the output voltage of the power supply) transmitted by the buck module, the supply voltage transmitted by the boost module to the signal output device can match the demand voltage even if the supply voltage transmitted by the buck module is boosted.

[0120] In another scenario, starting from the stage where the demand voltage corresponding to the envelope signal exceeds the output voltage of the power supply, as the demand voltage corresponding to the envelope signal shows a continuously decreasing trend, the second Schmitt comparator compares the demand voltage corresponding to the envelope signal with a third threshold (Vboost_close), thereby laging the disabled boost module. The third threshold is less than the output voltage of the power supply; for example, the third threshold can differ from the attribute voltage of the power supply by a third difference. Figure 4d The dashed line illustrates the relationship between the demand voltage (Vsigal) and the supply voltage (Vboost) output by the boost module during the demand voltage decrease phase. In other words, as the demand voltage corresponding to the envelope signal decreases until it reaches the output voltage of the power supply, the second Schmitt comparator enables the boost module via the second control signal. When the demand voltage corresponding to the envelope signal is greater than the output voltage of the power supply, the boost module boosts the output voltage of the power supply to match the demand voltage, ensuring that the supply voltage provided to the signal output device matches the demand voltage. Furthermore, the boost module remains in the boost enabled state until the demand voltage corresponding to the envelope signal drops below the output voltage of the power supply and then falls below the third threshold. 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 but does not initiate the boost function). Only after the demand voltage corresponding to the envelope signal drops to the third threshold is the boost module deactivated (i.e., disabled).

[0121] It should be noted that, Figure 4c and Figure 4d This example illustrates a scenario where the demand voltage continuously rises and falls. However, in actual operation, due to the constant changes in the output signal, the demand voltage is constantly fluctuating between rising and falling, i.e., jitter. Based on this, this embodiment uses a Schmitt trigger to ensure the third threshold is less than the second threshold. This prevents frequent enabling / disabling switching of the boost module when the demand voltage corresponding to the envelope signal fluctuates near the second or third threshold. For example, if the demand voltage rises above the second threshold, the boost module is enabled. However, the demand voltage might suddenly drop below the second threshold (but not to the third threshold) and then rise back above the second threshold. In this case, the Schmitt trigger prevents the boost module from being directly disabled simply because the demand voltage drops below the second threshold. This avoids frequent switching of the boost module's enable state due to demand voltage fluctuations, thus achieving boost control while preventing device losses caused by frequent switching of the boost module's enable state.

[0122] Meanwhile, when the demand voltage corresponding to the envelope signal is in a downward trend, the first Schmitt comparator also compares the demand voltage corresponding to the envelope signal with the fourth threshold value (Vbuck open) to control the buck enable state of the buck module. The fourth threshold value is less than the output voltage of the power supply, for example, the fourth threshold value can be different from the attribute voltage of the power supply by a fourth difference value. As shown in the dashed line in FIG. 8, when the demand voltage (Vsignal) is in a downward trend, the relationship between the demand voltage and the output voltage (Vbuck) of the buck module is shown, that is, the first Schmitt comparator does not enable the buck module when the demand voltage corresponding to the envelope signal is less than the fourth threshold value, and enables the buck module through the first control signal when the demand voltage corresponding to the envelope signal is less than the first threshold value, and the buck module performs buck processing on the attribute voltage of the power supply. Figure 4c

[0123] It should be noted that, Figure 4c Figure 4d The above description is based on the scenarios of the demand voltage rising and falling, but in actual operation, due to the continuous change of the to-be-output signal, the demand voltage is actually in a process of continuous alternating rise and fall, that is, jitter. Based on this, in the embodiment, the fourth threshold value is less than the first threshold value through the Schmitt comparator, so that when the demand voltage corresponding to the envelope signal jitters around the first threshold value or the fourth threshold value, the buck module is not frequently enabled and disabled. For example, the demand voltage is less than the fourth threshold value, and the buck module is enabled, but the demand voltage may suddenly rise above the fourth threshold value (but not rise to the first threshold value) and then fall below the fourth threshold value. At this time, through the Schmitt comparator, the buck module is not directly disabled when the demand voltage rises above the fourth threshold value, so that the buck enable state of the buck module is not frequently switched due to the jitter of the demand voltage, thereby achieving buck control while avoiding device loss caused by frequent switching of the buck enable state.

[0124] It can be seen that, in the embodiment, the Schmitt comparator can be used to enable and control the boost module and the buck module, so that even if the to-be-output signal frequently jitters around the enable threshold value or the disable threshold value, the boost and buck control can be achieved while avoiding frequent switching of the boost module and the buck module between the enable state and the disable state, thereby reducing the device loss caused by frequent switching of the enable state, and prolonging the use time of the module.

[0125] In other implementation manners, in the embodiment, four normal signal comparators can be used to enable and control the boost module and the buck module based on the first threshold value, the second threshold value, the third threshold value and the fourth threshold value in the foregoing, to avoid frequent switching of the enable states of the boost module and the buck module.​​

[0126] For example, referring to Figure 4c and Figure 4d , in the embodiment, when the demand voltage corresponding to the envelope signal is in a rising trend, a first comparator is used to monitor whether the demand voltage corresponding to the envelope signal is less than a first threshold (Vbuck_close), if yes, 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, the first comparator controls the buck module to be in a non-buck enabled state; and a second comparator is used to monitor whether the demand voltage corresponding to the envelope signal reaches a second threshold (Vboost_open), if yes, the second comparator controls the boost module to be in a boost enabled state.

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

[0128] It can be seen that Figure 4c and Figure 4d are described by taking the scenarios of rising and falling demand voltage as examples, and in actual operation, due to the continuous change of the to-be-output signal, the demand voltage is actually in a process of continuous alternating rise / fall, i.e., jitter. Based on this, in the embodiment, the thresholds used by the four comparators are set as: 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 appears jitter near the first threshold or the fourth threshold, the buck module will not be frequently switched between enabled and non-enabled states. When the demand voltage corresponding to the envelope signal appears jitter near the second threshold or the third threshold, the boost module will not be frequently switched between enabled and non-enabled states. Thus, while realizing buck and boost control, the device loss caused by frequent switching of the enabled state of the module can be avoided.

[0129] In an implementation manner, the power supply control device can further include a synchronization processing module 0, as shown in Figure 5 The synchronization processing module 0 is configured to perform time alignment processing on the envelope signal and the output signal processed by the signal output device a.

[0130] That is, in the embodiment, the envelope signal and the output signal of the signal output device are aligned in time by the synchronization processing module 0, so that the envelope signal which can more accurately represent the amplitude variation of the signal to be output is used to control the enable state of the boost module and the buck module, thereby making the control of the enable state of the boost module and the buck module more accurate.

[0131] In a specific implementation, the synchronization processing module 0 can be a delay module, 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 variation of the current signal to be output.

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

[0133] The digital-to-analog conversion module 5 is connected with 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, so as to control the enable state of the buck module.

[0134] Based on the above implementation, the synchronization processing module 0 is further arranged between the signal processing module 1 and the digital-to-analog conversion module 5, and is used to synchronize the envelope signal and the output signal of the signal output device a, as shown in Figure 6b The synchronization processing module 0 and the digital-to-analog conversion module 5 can be connected through an audio bus I2S (Inter-IC Sound).

[0135] In an implementation, the buck module 3 is further used to adjust a buck parameter during the buck processing of the output voltage of the power supply, according to the analog envelope signal.

[0136] The buck parameter can be a parameter used by the buck module 3 to enable the buck processing function. The buck module has different buck amplitudes for the output voltage of the power supply based on different buck parameters. Since the envelope signal can represent the demand voltage, the buck module 3 in the embodiment can use the demand voltage represented by the envelope signal as a reference voltage to perform buck processing on the output voltage of the power supply, so as to ensure that the power supply voltage obtained after buck processing matches the real demand voltage of the signal output device, and then the power supply voltage obtained after buck processing is transmitted to the signal output device a.

[0137] Reference Figure 7 ​A structural schematic diagram of an electronic device is provided in the embodiment of the present application, which comprises a power supply control device e, a power supply b and a signal output device a, etc. The power supply control device e can comprise the following structure:

[0138] A signal processing module 1 is configured to obtain a to-be-output signal of the signal output device a to be output to an external device, and perform first processing on the to-be-output signal to obtain an envelope signal, which represents the amplitude variation of the to-be-output signal in the time dimension.

[0139] A control module 2 is connected with the signal processing module 1 and a step-down module 3, and is configured to output a first control signal according to the envelope signal, which is used to control the working state of the step-down module 3.

[0140] The step-down module 3 is connected with the control module 2 and the power supply b, and is configured to adjust the step-down enable state of the step-down module 3 in response to the first control signal.

[0141] In the enable state, the step-down module 3 enables the step-down processing function to perform step-down processing on the output voltage output by the power supply b and transmit the step-down voltage output by the step-down module to the signal output device a. In the non-step-down enable state, the step-down module 3 directly transmits the output voltage output by the power supply b to the signal output device a.

[0142] According to the above technical solution, in the electronic device disclosed in the embodiment of the present application, the envelope signal of the to-be-output signal is obtained by the power supply control device to control the enable state of the step-down module. In the enable state, the step-down module can start the step-down processing function to transmit the step-down voltage output by the power supply to the signal output device, so that the high supply voltage is not transmitted to the signal output device, and thus the power waste is avoided, thereby achieving the purpose of saving energy consumption.

[0143] In an implementation manner, the electronic device can further comprise the following structure, as shown in Figure 8

[0144] A power amplifier combination comprises a plurality of power amplifiers c, each of which is connected with the signal processing module 1, the step-down module 3 and the control module 2. Each power amplifier c comprises a step-up module 4, which is connected with the control module 2 and the step-down module 3.

[0145] The control module 2 is further configured to output a second control signal according to the envelope signal, which is used to control the step-up enable state of each step-up module 4.

[0146] ​In the boost enable state, the boost module 4 enables the boost processing function to boost the power supply voltage transmitted by the step-down module 3; in the non-boost enable state, the boost module 4 directly transmits the power supply voltage output by the step-down module 3.

[0147] In an implementation manner, the control module 2 can include a first signal comparator 21 and a second signal comparator 22, as shown in Figure 9 The first signal comparator 21 and the second signal comparator 22 can be Schmidt comparators, i.e., 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 an implementation manner, the power supply control device further includes a synchronization processing module 0, as shown in Figure 10 The synchronization processing module 0 is used to perform time alignment processing on the envelope signal and the output signal of the signal output device after processing.

[0151] In an implementation manner, the envelope signal output by the signal processing module can be a digital envelope signal, based on which, the power supply control device in the embodiment can further include the following structure, as shown in Figure 11

[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 step-down module 3 and the control module 2. The control module 2 sends a first control signal to the step-down module 3 according to the envelope signal to control the enable state of the step-down module.

[0153] Based on the above implementation, the synchronization processing module 0 is further arranged between the signal processing module 1 and the digital-to-analog conversion module 5 to synchronize the envelope signal and the output signal of the signal output device a, as shown in Figure 12 The synchronization processing module 0 and the digital-to-analog conversion module 5 can be connected through I2S.

[0154] Reference Figure 13 An implementation flowchart of a power supply control method provided by the embodiment of the application, which can be applied to any one of the power supply control devices in the foregoing embodiments, can include the following flow: ​

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

[0156] The envelope signal represents the amplitude variation of the to-be-output signal in the time dimension. In a specific implementation, the to-be-output signal includes multiple audio signals, and the signal output device includes multiple power amplifiers corresponding to the multiple audio signals respectively. The envelope signal can be the sum of the amplitude variations of the multiple audio signals output to the multiple power amplifiers in the same time dimension.

[0157] Step 1302: outputting a first control signal according to the envelope signal, the first control signal being used to control a step-down enable state of a step-down module.

[0158] In the step-down enable state, the step-down module enables a step-down processing function to perform step-down processing on an output voltage output by a power supply and transmits the step-down module output power supply voltage to the signal output device. In the non-step-down enable state, the step-down module directly transmits the output voltage output by the power supply to the signal output device.

[0159] According to the technical solution described above, in the power supply control method disclosed in the embodiment, the step-down enable state of the step-down module is controlled by obtaining the envelope signal of the to-be-output signal. In the enable state, the step-down module can start the step-down processing function to transmit the step-down power supply voltage output by the power supply to the signal output device, so that the high power supply voltage is not transmitted to the signal output device, and great power waste is avoided, thereby achieving the purpose of saving energy consumption.

[0160] In an implementation manner, based on the power supply control device shown in Figure 2 or Figure 3 The method in the embodiment can further include the following steps, as shown in Figure 14 .

[0161] Step 1303: outputting a second control signal according to the envelope signal, the second control signal being used to control a step-up enable state of a step-up module in each signal output device.

[0162] In the step-up enable state, the step-up module enables a step-up processing function to perform step-up processing on the step-down module transmitted power supply voltage. In the non-step-up enable state, the step-up module directly transmits the step-down module output power supply voltage.

[0163] In an implementation manner, based on the power supply control device shown in Figure 2 or Figure 3 The method in the embodiment can further include the following steps, as shown in Figure 15 .

[0164] Step 1304: determining the demand voltage based on the envelope signal.

[0165] In this embodiment, the demand voltage can be determined based on the amplitude variation of the to-be-output signal represented by the envelope signal.

[0166] Step 1305: controlling the buck enable state of the buck module and the boost enable state of the boost module based on the variation trend and the value of the demand voltage.

[0167] In this embodiment, the variation trend of the demand voltage represents whether the demand voltage is in the rising phase or the falling phase, and the value of the demand voltage represents the value interval in which the demand voltage is located. Based on this, the buck module can be controlled to be in the enabled state or the disabled state and the boost module can be controlled to be in the enabled state or the disabled state based on whether the demand voltage is in the rising phase or the falling phase and the value interval in which the demand voltage is located.

[0168] Taking the scenario in which the signal comparator in the control module 2 is implemented by a Schmitt comparator as an example, the following is an example of controlling the buck enable of the buck module and the boost enable of the boost module in step 1305 when the demand voltage is in the rising phase, in combination with the architecture diagram shown in Figure 18 and Figure 19 The following is an example of controlling the buck enable of the buck module and the boost enable of the boost module in step 1305 when the demand voltage is in the rising phase, in combination with the architecture diagram shown in

[0169] If the envelope signal output by the signal processing module ① represents that the demand voltage is in the rising phase and is in the first interval, the buck module ⑤ is controlled to be in the buck enable state by the Schmitt comparator ⑦ and the boost module ⑥ is controlled to be in the non-boost enable state by the Schmitt comparator ⑧ in step 1305, so that the buck module ⑤ works to reduce the output voltage output by the power supply, and the boost module ⑥ only performs voltage transmission, and the supply voltage output by the buck module ⑤ follows the demand voltage.

[0170] In this embodiment, the voltage in the first interval is less than the output voltage output by the power supply. For example, the first interval can be the interval from Vo_min to Vbuck_close. As shown in Figure 16a , the relationship between the demand voltage (Vsigal) and the supply voltage (Vbuck) output by the buck module in the demand voltage rising phase is shown in the diagram, Vo_min can be a value greater than or equal to 0, and Vbuck_close is a value less than V2s, and V2s is the rated working voltage of the power supply. Figure 16aIn the embodiment, the abscissa is the value of the demand voltage Vsigal corresponding to the envelope signal, and the ordinate is the supply voltage Vbuck obtained after the demand voltage Vsigal in the rising stage is stepped down through the step-down module. That is, when the demand voltage is in the rising stage but in the interval less than Vbuck_close, it indicates that the output voltage of the power supply is too large, so the step-down module is enabled to step down the output voltage, and the step-up module is not enabled to perform the step-up function, so that the supply voltage output by the step-down module can match the demand voltage, thus achieving flexible control of the step-down, that is Figure 16a In the embodiment, the step-down is not the step-up when the demand voltage rises from Vo_min to Vbuck_close, and the supply voltage Vbuck after the step-down through the step-down module matches the demand voltage Vsingal.

[0171] If the envelope signal output by the signal processing module ① represents that the demand voltage is in the rising stage and in the second interval, the step-down module ⑤ is controlled by the Schmitt trigger ⑦ to only perform voltage transmission, and the step-up module ⑥ is controlled by the Schmitt trigger ⑧ to only perform voltage transmission in step 1305. The voltage in the second interval is greater than that in the first interval.

[0172] In the embodiment, the minimum voltage in the second interval is greater than the maximum voltage in the first interval. For example, the second interval can be the interval from vbuck_close to Vboost_open, and Vboost_open is less than V2s (the rated working voltage of the two lithium batteries), such as Figure 16a as shown by the solid line in the embodiment. Figure 16a and the subsequent Figure 16b are described by taking the continuous rising / descending of the demand voltage as an example, but in the actual working process, the demand voltage is actually in the process of continuous alternating rising / descending due to the continuous change of the audio signal.

[0173] If the demand voltage is in the rising stage and in the third interval, the step-down module ⑤ is controlled by the Schmitt trigger ⑦ to only perform voltage transmission, and the step-up module ⑥ is controlled by the Schmitt trigger ⑧ to work to raise the supply voltage transmitted by the step-down module ⑤ in step 1305.

[0174] In the embodiment, the value of the third interval is greater than the voltage of the second interval. For example, the third interval can 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. For example, Figure 16b as shown by the solid line in the embodiment. That is, when the demand voltage continues to rise and rises to Vboost_open which is less than V2s, the step-up module is enabled, and when the demand voltage reaches V2s, the supply voltage transmitted by the step-down module ⑤ is stepped up through the step-up module which is enabled in advance, thus achieving flexible control of the step-up.

[0175] For example, in the case of the signal comparator in the control module 2 being implemented by a Schmitt comparator, in combination with the architecture diagram shown in Figure 18 and Figure 19 , the following is an example of the control of the buck enable of the buck module and the boost enable of the boost module in step 1305 when the demand voltage is in the falling phase:

[0176] If the envelope signal output by the signal processing module 1 represents that the demand voltage is in the falling phase and has not reached the first voltage value, the boost module ⑥ is controlled to work in step 1305 by the Schmitt comparator ⑧, the boost module ⑥ controls the output voltage of the power supply to boost, so that the supply voltage transmitted by the boost module to the signal output device matches the demand voltage, as shown by the dashed line in Figure 16b .

[0177] If the envelope signal output by the signal processing module 1 represents that the demand voltage is in the falling phase and has reached the first voltage value (corresponding to the third threshold value in the foregoing, i.e. Vboost_close), the boost module ⑥ is controlled to stop working in step 1305 by the Schmitt comparator ⑧, only voltage transmission is performed, and the buck module ⑤ is controlled to only perform voltage transmission by the Schmitt comparator ⑦, at this time, the supply voltage provided to the signal output device is the output voltage of the power supply, i.e. V2s, as shown by the dashed line aligned with V2s in Figure 16b .

[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 can be Vboost_close, which is less than Vboost_open. As shown in Figure 16b , which is a schematic diagram of the relationship between the demand voltage (Vsigal) in the falling phase of the demand voltage and the supply voltage (Vboost) output by the boost module, Vo_min is a value greater than 0. Figure 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 falling stage. That is, when the demand voltage starts to fall from a higher interval, such as a value higher than V2s, and falls to less than the first voltage value, such as Vboost_close, the supply voltage transmitted by the buck module does not need to continue to be boosted, and at the same time, the demand voltage has not fallen to the second voltage value, such as Vbuck_open, that enables the buck module, so the buck does not need to be bucked. At this time, the boost module is disabled and the buck module is not enabled, and at this time, the boost module and the buck module only transmit the output voltage of the power supply, and the output voltage is provided as the supply voltage to the signal output device. That is, the 2S battery provides the signal output device with a rated operating voltage, such as V2s, through the buck module and the boost module.

[0179] It should be noted that Vboost_close is less than Vboost_open, so that when the demand voltage corresponding to the envelope signal fluctuates around Vboost_close or Vboost_open, the boost module will not be frequently enabled and disabled by the Schmidt comparator. In this way, the boost enable state of the boost module will not be frequently switched due to the fluctuation of the demand 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 demand voltage is in the falling stage and falls below the second voltage value (corresponding to the fourth threshold value in the foregoing), the buck module ⑤ is controlled to work to reduce the output voltage of the power supply in step 1305 by the Schmidt comparator ⑦, and the boost module ⑥ is controlled to only transmit voltage by the Schmidt comparator ⑧. At this time, the supply voltage transmitted by the boost module to the signal output device matches the demand voltage, as shown by the dashed line in Figure 16b .

[0181] The second voltage value is in the first interval, such as the interval from Vo_min to Vbuck_close. For example, the second voltage value can be Vbuck_open, as shown by the dashed line in Figure 16b . At this time, Vbuck_open is less than Vbuck_close. That is, when the demand voltage continues to fall and falls below the second voltage value Vbuck_open, the output voltage of the power supply is too high, the buck module is enabled, and the boost module continues to be disabled, so that the supply voltage output by the buck module can match the demand voltage, thereby achieving flexible control of the buck.

[0182] It should be noted that Vbuck-open is less than Vbuck-close, so when the demand voltage corresponding to the envelope signal appears jitter near Vbuck-open or Vbuck-close, the buck module will not be frequently enabled and disabled by the Schmidt comparator. Therefore, the buck module will not be frequently switched between the buck enable state and the non-buck enable state due to the jitter of the demand voltage, thereby achieving buck control while avoiding device loss caused by frequent switching of the buck module between the buck enable state and the non-buck enable state.

[0183] In an implementation manner, before the demand voltage is determined based on the envelope signal in step 1304 in the embodiment, the following processing can also be performed, as shown in Figure 17

[0184] Step 1306: Time alignment processing is performed on the envelope signal and the output signal of the signal output device after processing.

[0185] Specifically, in the embodiment, the envelope signal and the output signal of the signal output device are aligned by the 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 which more accurately represents the amplitude change of the signal to be output, thereby enabling more accurate control of the enable state of the buck module and the boost module.

[0186] In an implementation manner, the method in the embodiment can further include the following processing:

[0187] The buck module adjusts the buck parameter according to the analog envelope signal during the buck processing of the output voltage of the power supply.

[0188] The buck parameter can be a parameter used by the buck module to enable the buck processing function, such as a reference voltage and the like. The buck module performs buck processing on the output voltage of the power supply according to the reference voltage and other buck parameters, and then transmits the bucked power supply voltage to the signal output device through the boost module.

[0189] Taking the 2S battery containing two lithium batteries as an example, based on the playing scene of the audio signal, the technical solution of the present application is described as follows:

[0190] As shown in Figure 18 and 19 The structure diagram of the improved power supply control architecture in the tablet device in the embodiment is shown as follows:

[0191] ​Firstly, in the new architecture, the smart PA algorithm is moved to the SOC (System on Chip) in the tablet.

[0192] Based on this, the DSP (Digital Signal Processing) in the SOC outputs the smart PA algorithm of each audio signal, and inputs the audio signal of each smart PA algorithm to the module ① (i.e., the signal processing module 1 in the foregoing) for signal envelope calculation, takes the real-time maximum value of each audio signal, and outputs the maximum value, and then outputs the maximum value to the DAC module ④ (i.e., the digital-to-analog conversion module 5 in the foregoing) through the I2S interface ③ after passing through the delay module ② (i.e., the synchronization processing module 0 in the foregoing), and the output audio signal is input to the reference voltage ref input end of the module ⑤ (i.e., the step-down module 3 in the foregoing), so as to realize the step-down control of the module ⑤.

[0193] The output voltage of the 2S battery is provided to the module ⑤ by the PMU (Power Management Unit).

[0194] Further, the module ⑤ is controlled by the module ⑦ (i.e., the first Schmitt trigger in the foregoing) to be in an enabled state or a disabled state, such as Figure 18 the enabled state on of the module ⑤, such as Figure 19 the disabled state off of the module ⑤, and the module ⑥ (i.e., the step-up module 4 in the foregoing) is controlled by the module ⑧ (i.e., the second Schmitt trigger in the foregoing) to be in an enabled state or a disabled state, such as Figure 18 the disabled state off of the module ⑥, such as Figure 19 the enabled state on of the module ⑥. In combination with the relationship diagram between the required voltage and the supply voltage shown in Figure 16a and Figure 16b the control logic of the step-up and step-down is described as follows:

[0195] A, as shown in Figure 18 , when the envelope value of the maximum to-be-output signal of the smart PA in the DSP is in the rising phase and in the first interval of (Vo_min, Vbuck_close), the module ⑤ works (i.e., the step-down module is in the enabled state) and outputs the corresponding supply voltage to the digital power amplifier class-D, at this time, the module ⑥ is in the bypass or disable mode (i.e., the step-up module is in the disabled state), so that the supply voltage Vbuck output from the module ⑤ to the module ⑥ (i.e., the supply voltage Vboost output from the module ⑥ to the class-D) follows the input voltage, that is, the required voltage Vsignal, such as Figure 16a , andFigure 16b As shown in the figure.

[0196] B. When the envelope value of the maximum output signal of the smart PA in the DSP is in the rising phase and within the range of (Vbuck_close, Vboost_open), both modules ⑤ and ⑥ are in bypass or disabled mode (i.e., both the buck and boost modules are disabled), making the supply voltage Vbuck from module ⑤ to module ⑥ V2s, and the supply voltage Vboost from module ⑥ to class-D is also V2s. Figure 16a and Figure 16b As shown in the image.

[0197] C. For example Figure 19 As shown, when the envelope value of the maximum output signal of the smart PA in the DSP is in the rising phase and within the range of (Vboost_open, V2s), module ⑤ enters bypass or disable mode (i.e., non-buck-enabled state), and module ⑥ starts the boost processing function. However, since the demand voltage is less than V2s, module 6 will not perform boost processing and will output 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. Figure 16a as well as Figure 16b As shown by the solid line in the middle.

[0198] D. As Figure 19 As shown, when the envelope value of the maximum output signal of the smart PA in the DSP is in the rising phase and within the range of (V2s, Vo_max), module ⑤ is still in bypass or disabled mode, module ⑥ performs boost 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 remains at V2s, as shown. Figure 16a and Figure 16b As shown by the solid line. Vo_max can be an infinitely large value.

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

[0200] E. For example Figure 19As shown, before the envelope value of the maximum output signal of the smart PA in the DSP is in the decreasing phase and reaches Vboost_close, module ⑤ is still in bypass or disabled mode, module ⑥ is in boost enabled 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 remains at V2s. Figure 16a and Figure 16b As 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 phase and reaches Vboost_close, module ⑥ enters bypass or disable mode, while module ⑤ remains in bypass or disable mode. At this time, the supply voltage Vbuck from module ⑤ to module ⑥ is V2s, and the supply voltage Vboost from module ⑥ to class-D is also V2s. Figure 16a and Figure 16b As shown by the dashed line. In this embodiment, setting Vboost_close to a value less than Vboost-open can avoid frequent switching of the enable state of module ⑥ when the required voltage vsignal changes near Vboost-open or Vboost_close during audio signal changes.

[0202] G, such as Figure 18 As shown in the figure, when the envelope value of the maximum output signal of the smart PA in the DSP is in the falling phase 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. Figure 16a and Figure 16b As shown by the dashed line. In this embodiment, setting Vbuck_open to a value less than Vbuck_close can avoid frequent switching of the enable state of module ⑤ when the required voltage vsignal changes near Vbuck_open or Vbuck_close during audio signal changes.

[0203] It should be noted that, in the case that the module 5 does not start the voltage reduction processing function, the power supply voltage output by the module 5 is the output voltage of the 2S battery, i.e. V2s. In the case that the module 5 starts the voltage reduction processing function, the power supply voltage output by the module 5 is the voltage of the output voltage of the 2S battery after being reduced by the module 5, i.e. Vbuck.

[0204] wherein V1s represents the rated operating voltage of a normal 1S battery. V2s represents the rated operating voltage of a 2S battery. Vboost_open represents the enable voltage of the boost module boost in the demand voltage rising stage, and Vboost_open is affected by the start time of the boost module, wherein the shorter the start time of the boost module, the greater Vboost_open is.

[0205] Vboost_close represents the close (i.e. disable) voltage of the boost module boost in the demand voltage falling stage, and Vboost_close can be determined by debugging, wherein the shorter the close time of the boost module, the greater Vboost_close is.

[0206] Vbuck_open represents the enable voltage of the buck module buck in the demand voltage falling stage, and Vbuck_open is determined by the maximum output voltage of the buck. Vbuck_close represents the close voltage of the buck module buck in the demand voltage rising stage, and Vbuck_close can be determined by debugging, wherein the shorter the close time of the buck module, the greater Vbuck_close is.

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

[0208] It should also be noted that, in this document, the relationship terms such as first and second 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 the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0209] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM, flash memory, ROM, electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. The exemplary storage media are coupled to the processor such the processor can read information from, and write information to, the storage media.

[0210] The above description of disclosed embodiments is intended to be illustrative and not restrictive. Many modifications of these embodiments by one having ordinary skill in the art are intended to be within the scope of the application. Changes can be made in the details of the above-described embodiments of the present application without departing from the spirit or scope thereof. Accordingly, the disclosure of the present application is intended to be illustrative, but not limiting, of the scope of the application, which is set forth in the following claims.

Claims

1. A power supply control device, comprising: The signal processing module is used to obtain multiple audio signals to be output to the signal output device, and to perform envelope calculation on the multiple audio signals to obtain an envelope signal, wherein the envelope signal represents the sum of the amplitude changes of the multiple audio signals in the same time dimension; the signal output device includes multiple power amplifiers, which are used to receive each of the audio signals respectively. The control module is used to receive and monitor the envelope signal. When the demand voltage corresponding to the envelope signal is in a continuously increasing trend, it monitors whether the demand voltage corresponding to the envelope signal is less than a first threshold. If so, it outputs a first control signal to control the buck module to be in buck-enabled state; if not, it outputs a first control signal to control the buck module to be in non-buck-enabled state. It also monitors whether the demand voltage corresponding to the envelope signal reaches a second threshold. If so, it outputs a second control signal to control the boost module to be in boost-enabled state. Each boost module in the power amplifier is connected to the output terminal of the buck module. The control module is also used to monitor whether the demand voltage corresponding to the envelope signal drops to the third threshold when the demand voltage corresponding to the envelope signal is in a continuously decreasing trend. If so, it outputs a second control signal to control the boost module to enter the non-boost enable state. In addition, it monitors whether the required voltage corresponding to the envelope signal drops to the fourth threshold. If so, it outputs a first control signal to control the buck module to be in buck enable state; wherein the third threshold is less than the second threshold, and the fourth threshold is less than the first threshold. The step-down module is connected to the control module and the power supply, and is used to adjust the step-down enable state of the step-down module in response to the first control signal; In the buck-enabled state, the buck module uses the buck processing function to step down the output voltage of the power supply and transmits the power supply voltage output by the buck module to the signal output device; in the non-buck-enabled state, the buck module directly transmits the output voltage of the power supply to the signal output device. In boost-enabled mode, the boost module uses the boost processing function to boost the supply voltage transmitted by the buck module; in non-boost-enabled mode, the boost module directly transmits the supply voltage output by the buck module.

2. The power supply control device according to claim 1, wherein the control module is used for: When the envelope signal satisfies the first condition, a first control signal that enables the buck module is output; the required voltage corresponding to the envelope signal characterized by the first condition is less than the output voltage of the power supply. When the envelope signal satisfies the second condition, a second control signal that enables 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.

3. The power supply control device according to claim 2, wherein the control module includes a first Schmitt comparator and a second Schmitt comparator; in, The input of the first Schmitt comparator is connected to the envelope signal output of the signal processing module, and the output of the first Schmitt comparator is connected to the buck module. The first Schmitt comparator is used to output the first control signal. The input of the second Schmitt comparator is connected to the envelope signal output of the signal processing module, and the output of the second Schmitt comparator is connected to the boost module. The second Schmitt comparator is used to output the second control signal.

4. The power supply control device according to claim 1, further comprising: The synchronization processing module is used to perform time alignment processing between the envelope signal and the output signal processed by the signal output device.

5. 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 converter module, connected to the signal processing module, is used to convert the digital envelope signal into an analog envelope signal and send the analog envelope signal to the buck module and the control module; The step-down module is also used to adjust the step-down parameters according to the analog envelope signal during the step-down process of the output voltage output by the power supply.

6. An electronic device, comprising a power supply control device, the power supply control device comprising: The signal processing module is used to obtain multiple audio signals to be output to the signal output device of the peripheral device, and to perform envelope calculation on the multiple audio signals to obtain an envelope signal, wherein the envelope signal represents the sum of the amplitude changes of the multiple audio signals in the same time dimension; the signal output device includes multiple power amplifiers, which are used to receive each of the audio signals respectively. The control module is used to receive and monitor the envelope signal. When the demand voltage corresponding to the envelope signal is in a continuously increasing trend, it monitors whether the demand voltage corresponding to the envelope signal is less than a first threshold. If so, it outputs a first control signal to control the buck module to be in buck-enabled state; if not, it outputs a first control signal to control the buck module to be in non-buck-enabled state. It also monitors whether the demand voltage corresponding to the envelope signal reaches a second threshold. If so, it outputs a second control signal to control the boost module to be in boost-enabled state. Each boost module in the power amplifier is connected to the output terminal of the buck module. The control module is also used to monitor whether the demand voltage corresponding to the envelope signal drops to the third threshold when the demand voltage corresponding to the envelope signal is in a continuously decreasing trend. If so, it outputs a second control signal to control the boost module to enter the non-boost enable state. In addition, it monitors whether the required voltage corresponding to the envelope signal drops to the fourth threshold. If so, it outputs a first control signal to control the buck module to be in buck enable state; wherein the third threshold is less than the second threshold, and the fourth threshold is less than the first threshold. The step-down module is connected to the control module and the power supply, and is used to adjust the step-down enable state of the step-down module in response to the first control signal; In the buck-enabled state, the buck module uses the buck processing function to step down the output voltage of the power supply and transmits the power supply voltage output by the buck module to the signal output device; in the non-buck-enabled state, the buck module directly transmits the output voltage of the power supply to the signal output device. The electronic device further includes: A power amplifier assembly includes multiple power amplifiers, each of which is connected to the signal processing module, the buck module, and the control module; each power amplifier includes a boost module, which is connected to both the control module and the buck module. In boost-enabled mode, the boost module uses the boost processing function to boost the supply voltage transmitted by the buck module; in non-boost-enabled mode, the boost module directly transmits the supply voltage output by the buck module.

7. A power supply control method, comprising: Determine the envelope signal of the multiple audio signals to be output to the signal output device, wherein the envelope signal characterizes the sum of the amplitude changes of the multiple audio signals in the same time dimension; A first control signal is output based on the envelope signal, and the first control signal is used to control the buck enable state of the buck module; In the buck-enabled state, the buck module uses the buck processing function to step down the output voltage of the power supply and transmits the power supply voltage output by the buck module to the signal output device; in the non-buck-enabled state, the buck module directly transmits the output voltage of the power supply to the signal output device. Also includes: A second control signal is output based on the envelope signal. The second control signal is used to control the boost enable state of the boost module in each signal output device. In the boost-enabled state, the boost module uses 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. Specifically, when the demand voltage corresponding to the envelope signal is on an increasing trend, the system monitors whether the demand voltage corresponding to the envelope signal is less than a first threshold. If so, it outputs a first control signal to control the buck module to be in buck-enabled state; otherwise, it outputs a first control signal to control the buck module to be in non-buck-enabled state. It also monitors whether the demand voltage corresponding to the envelope signal reaches a second threshold. If so, it outputs a second control signal to control the boost module to be in boost-enabled state. Each boost module in the power amplifier is connected to the output terminal of the buck module. When the demand voltage corresponding to the envelope signal is on a decreasing trend, the system monitors whether the demand voltage corresponding to the envelope signal drops to a third threshold. If so, it outputs a second control signal to control the boost module to enter non-boost-enabled state. Furthermore, it monitors whether the demand voltage corresponding to the envelope signal drops to a fourth threshold. If so, it outputs a first control signal to control the buck module to be in buck-enabled state. The third threshold is less than the second threshold, and the fourth threshold is less than the first threshold.

8. The power supply control method according to claim 7 further includes: The required voltage is determined based on the envelope signal; Based on the changing trend and value of the required voltage, the buck enable state of the buck module and the boost enable state of the boost module are controlled.

9. The power supply control method according to claim 8, wherein controlling the buck enable state of the buck module and the boost enable state of the boost module based on the changing trend and value of the demand voltage includes: If the required voltage is in the rising phase and within the first interval, the buck module is controlled to operate to reduce the output voltage of the power supply, and the boost module is controlled to only perform voltage transmission; the voltage in the first interval is less than the output voltage of the power supply. If the required voltage is in the rising phase and in the second interval, the buck module and the boost 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 phase and in the third interval, the buck module is controlled to only transmit voltage, and the boost module is controlled to work to increase the supply voltage transmitted by the buck module. The value of the third interval is greater than the voltage of the second interval.

10. The power supply control method according to claim 9, wherein the buck enable state of the buck module and the boost enable state of the boost module are controlled based on the changing trend and value of the demand voltage, comprising: If the required voltage is in a decreasing phase and reaches below the 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, wherein the first voltage value is within the second range; If the required voltage is in a decreasing phase and drops below the second voltage value, the buck module is controlled to operate to reduce the output voltage of the power supply, where the second voltage value is within the first range.

11. The power supply control method according to claim 8, further comprising, before determining the required voltage based on the envelope signal: The envelope signal is time-aligned with the output signal processed by the signal output device.

12. The power supply control method according to claim 7, further comprising: During the process of stepping down the output voltage of the power supply, the step-down module adjusts the step-down parameters according to the envelope signal.

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