WO2023087781A1 - Power supply circuit and method, electronic device and computer-readable storage medium - Google Patents

Abstract

A power supply circuit and method, an electronic device, and a computer-readable storage medium. The power supply circuit is used for supplying power to a processor, and comprises: an AVS module (42) used for monitoring and outputting the performance of the processor (41); and a switching power supply (43) used for adjusting the power supply voltage provided to the processor (41) according to the output of the AVS module (42), wherein the switching frequency of the switching power supply (43) is greater than 10 MHz. The switching frequency used by the switching power supply (43) in the power supply circuit is greater than 10 MHz, such that the switching power supply (43) quickly stabilizes the power supply voltage to a power supply voltage value required by the processor (41) according to the voltage requirements of the processor (41) output by the AVS module (42), and the adaptive adjustment time of the AVS module (42) is correspondingly shortened, thereby effectively reducing the working loss of the processor (41).

Description

Power supply circuit and method, electronic device, and computer-readable storage medium

This application claims the priority of the Chinese patent application with the application number 202111359237.5 and the title of "power supply circuit and method, electronic device and computer-readable storage medium" submitted to the China Patent Office on November 16, 2021, the entire content of which is passed References are incorporated in this application.

technical field

The present application relates to the technical field of power supply, and more specifically, to a power supply circuit and method, electronic equipment, and a computer-readable storage medium.

Background technique

At present, the power supply mode of the processor of the electronic equipment is mostly based on the mode of switching power supply. In order to ensure that the system served by the processor can work safely and stably, the switching power supply generally provides the processor with a stable power supply voltage higher than the theoretically optimal working voltage of the processor according to the needs of the processor, and on this basis, through the AVS module Adjust this supply voltage to the theoretical optimum operating voltage of the processor.

However, it takes a long time for the existing switching power supply to provide a stable power supply voltage according to the needs of the processor. Limited by this, the adjustment time of the AVS module is also relatively long, which will cause the processor to operate for a long time. Working under high power supply voltage increases the working loss of the processor.

Contents of the invention

The present application provides a power supply circuit and method, electronic equipment, and a computer-readable storage medium to solve the above problems.

In the first aspect, a power supply circuit is provided, which is used to supply power to the processor, including: an AVS module, used to monitor and output the performance of the processor; a switching power supply, used to adjust the output of the AVS module to provide The power supply voltage of the processor, wherein the switching frequency of the switching power supply is greater than 10MHz.

Optionally, the switching power supply includes: a voltage conversion module, configured to output the supply voltage according to a voltage regulation signal; a feedback module, configured to monitor the supply voltage output by the voltage conversion module to generate a feedback signal; a power supply A management module, configured to provide the voltage regulation signal to the voltage conversion module according to the feedback signal and/or the performance of the processor.

Optionally, the voltage conversion module includes a first switch tube and a second switch tube connected to each other, and a connection point between the first switch tube and the second switch tube and a voltage output terminal that outputs the power supply voltage An inductor is arranged between them, the output end of the inductor is connected to one end of the capacitor, and the other end of the capacitor is grounded, and the voltage conversion module controls the first switch tube and the second switch tube according to the voltage regulation signal The switching frequency and the duty cycle of the switch, so that the inductor and/or the capacitor outputs the supply voltage.

Optionally, the feedback module includes: a comparator having an input terminal, a reference terminal and an output terminal, the input terminal of the comparator is used for monitoring the supply voltage, and the reference terminal of the comparator is used for receiving a reference voltage The output terminal of the comparator is used to output the comparison result between the supply voltage and the reference voltage as the feedback signal to the power management module.

Optionally, the feedback module is a feedback module based on hysteresis control.

Optionally, the feedback module includes: the feedback module further includes a voltage divider, the voltage divider includes a first voltage dividing resistor and a second voltage dividing resistor, the first voltage dividing resistor and the second voltage dividing resistor The voltage-dividing resistors are connected in series, the other end of the first voltage-dividing resistor is connected to the voltage output end that outputs the power supply voltage, the other end of the second voltage-dividing resistor is grounded, and the input end of the comparator is connected to the The connection point of the first voltage dividing resistor and the second voltage dividing resistor is connected to monitor the voltage of the power supply voltage after being divided by the voltage divider.

Optionally, the performance of the processor includes an operating frequency of the processor and/or a temperature of the processor.

In the second aspect, there is provided a power supply method for supplying power to a processor, the method comprising: using an AVS module to monitor and output the performance of the processor; The power supply voltage of the processor, wherein the switching frequency of the switching power supply is greater than 10MHz.

Optionally, the adjusting the power supply voltage provided to the processor through the switching power supply includes: outputting the power supply voltage through a voltage conversion module according to a voltage regulation signal; monitoring the power supply voltage output by the voltage conversion module through a feedback module. The power supply voltage is used to generate a feedback signal; according to the feedback signal and/or the performance of the processor, the power management module provides the voltage regulation signal to the voltage conversion module.

Optionally, the voltage conversion module includes a first switch tube and a second switch tube connected to each other, and a connection point between the first switch tube and the second switch tube and a voltage output terminal that outputs the power supply voltage There is an inductor between them, the output end of the inductor is connected to one end of the capacitor, and the other end of the capacitor is grounded, and the output of the power supply voltage through the voltage conversion module according to the voltage regulation signal includes: according to the voltage regulation signal , by controlling the switching frequency and duty cycle of the first switching tube and the second switching tube in the voltage conversion module, so that the inductor and/or the capacitor outputs the supply voltage.

Optionally, the feedback module includes: a comparator, the comparator has an input terminal, a reference terminal and an output terminal, and the feedback module monitors the supply voltage output by the voltage conversion module to generate a feedback signal, It includes: monitoring the supply voltage output by the voltage conversion module through the input terminal of the comparator; receiving a reference voltage through the reference terminal of the comparator; comparing the supply voltage with the output terminal of the comparator The comparison result of the reference voltage is output to the power management module as the feedback signal.

Optionally, the monitoring the supply voltage output by the voltage conversion module through a feedback module includes: monitoring the supply voltage output by the voltage conversion module through a feedback module based on hysteresis control.

Optionally, the feedback module further includes a voltage divider, the voltage divider includes a first voltage dividing resistor and a second voltage dividing resistor, the first voltage dividing resistor and the second voltage dividing resistor are connected in series, The other end of the first voltage dividing resistor is connected to the voltage output terminal that outputs the power supply voltage, the other end of the second voltage dividing resistor is grounded, and the input end of the comparator is connected to the first voltage dividing resistor and The connection point of the second voltage dividing resistor is connected, and the monitoring of the supply voltage output by the voltage conversion module through the input terminal of the comparator includes: monitoring the voltage conversion through the input terminal of the comparator The power supply voltage output by the module is divided by the voltage divider.

Optionally, the performance of the processor includes an operating frequency of the processor and/or a temperature of the processor.

In a third aspect, there is provided an electronic device, including: a processor; an AVS module, used to monitor and output the performance of the processor; a switching power supply, used to adjust the power provided to the processor according to the output of the AVS module A power supply voltage, wherein the switching frequency of the switching power supply is greater than 10MHz.

In a fourth aspect, a computer-readable storage medium is provided, the computer storage medium stores a computer program, and when the computer program is executed, the method according to the second aspect is implemented.

In the power supply circuit for the processor provided by the embodiment of the present application, the switching frequency used by the switching power supply is greater than 10MHz, which can make the switching power supply quickly stabilize the power supply voltage to the processor's voltage requirement according to the voltage demand of the processor output by the AVS module. The required power supply voltage value, so that the adaptive adjustment time of the AVS module is correspondingly shortened, so as to effectively reduce the working loss of the processor.

Description of drawings

FIG. 1 is a schematic structural diagram of a power supply system of an electronic device in the related art.

Fig. 2 is a schematic structural diagram of an electronic device in the related art.

Fig. 3 is an example diagram of the voltage regulation of the AVS module in the embodiment of the present application.

FIG. 4 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of a circuit structure of an electronic device provided by an embodiment of the present application.

FIG. 6 is a schematic diagram of another circuit structure of the electronic device provided by the embodiment of the present application.

FIG. 7 is a schematic diagram of a power supply experiment result of an electronic device provided in an embodiment of the present application.

FIG. 8 is a schematic flowchart of a power supply method provided by an embodiment of the present application.

Detailed ways

In order to facilitate understanding of the present application, the present application is described in more detail below based on exemplary embodiments in conjunction with the accompanying drawings. The same or similar reference numerals are used in the figures to denote the same or similar modules. It should be understood that the drawings are only schematic, and the protection scope of the present application is not limited thereto.

Firstly, the power supply scheme of the processor is introduced with reference to FIG. 1 .

FIG. 1 shows a power supply system applied to an electronic device, and the power supply system is used to supply power to a processor in the electronic device.

The aforementioned electronic device may be any of various types of computer system devices that are mobile or portable and perform wireless communication. For example, the electronic device can be a mobile phone or smart phone (such as an iPhone™-based phone, or an Android™-based phone), a portable gaming device (such as Nintendo DS™, Play Station Portable™, Gameboy Advance™, iPhone™) , laptop computers, personal digital assistants (personal digital assistant, PDA), portable Internet devices, music players and data storage devices, other handheld devices and such as watches, earphones, pendants, headsets, etc. Alternatively, the electronic device may also be other wearable devices, such as, for example, electronic glasses, electronic clothes, electronic bracelets, electronic necklaces, electronic tattoos, electronic devices, smart watches or head mount displays (head mount display, HMD). For another example, the electronic device may also be a vehicle-mounted electrical device, for example, a vehicle machine, a driving recorder, a vehicle central control system, or a vehicle-mounted positioning device.

Continuing to refer to FIG. 1 , the power supply system includes a switching power supply 1 and a processor 2 in an electronic device. The switching power supply 1 is used to provide a power supply voltage for a processor 2 of an electronic device.

The processor 2 is the computing core and control core of the electronic device, and can connect various parts of the entire electronic device with various interfaces and lines. The processor 2 can be used to execute instructions, programs, code sets or instruction sets, etc., and can also call external data, execute various functions of electronic equipment, and process data. The embodiment of the present application does not limit the specific type of the processor 2, for example, it may be a central processing unit (central processing unit, CPU), a graphics processing unit (graphics processing unit, GPU) or a processor that integrates the central processing unit and the graphics processing unit. Any of the system on chip (SOC).

For the processor 2, an important index affecting its performance is the operating frequency. The computing power of the processor 2 is basically proportional to its operating frequency. Processor 2 is usually configured to work at different operating frequencies. For example, the working frequency of the processor 2 can be reasonably configured according to different workloads (eg, current and future working scenarios of the processor and requirements of computing tasks). Specifically, when the workload of the processor 2 is large, a higher operating frequency can be selected; when the workload of the processor 2 is small, a lower operating frequency can be selected.

Since the processor 2 may have different operating frequencies under different working conditions, the power supply voltage required by the processor 2 under different working conditions is also different. The power supply voltage required by the processor corresponds to the working frequency of the processor 2 , that is, the higher the working frequency, the greater the required power supply voltage, and the lower the working frequency, the smaller the required power supply voltage. It can be understood that, the operating frequency of the processor mentioned in the embodiment of the present application refers to the core operating frequency.

In actual work, the processor 2 will evaluate and judge according to different current and future working conditions, decide the working frequency of the processor at the next moment, and then notify the switching power supply 1 to make corresponding voltage changes. Therefore, as shown in Figure 1, the power supply system also includes a communication module 3, through which the switching power supply 1 and the processor 2 communicate through the communication module 3, so as to communicate the power supply voltage requirements of the processor 2 under different working conditions to the switch The power supply 1 changes its working state through the switching power supply 1 to provide the processor 2 with the required power supply voltage.

Continuing to refer to FIG. 1 , the switching power supply 1 includes a power management module 11 and a voltage conversion module 12 . The power management module 11 can not only be connected with the voltage conversion module 12 , but also be connected with the processor 2 through the communication module 3 .

The power management module 11 can adjust the output voltage of the voltage conversion module 12 according to the working requirements of the processor 2 . The power management module 11 may be, for example, a power management integrated circuit (power management IC, PMIC for short).

The voltage conversion module 12 can also be called a power conversion module, and is used to convert the input voltage into an output voltage according to the voltage regulation signal output by the power management module 11 to provide power for the processor 2 . The input voltage can be provided by an input power source 4, which can be a battery, for example. The voltage conversion module 12 may be a Buck topology circuit shown in FIG. 1 , which is not specifically limited here.

The voltage conversion module 12 includes a plurality of switching elements, an inductor L1 and a capacitor C1. Taking Fig. 1 as an example, the plurality of switching elements include a first switching element Q1 and a second switching element Q2, and the first switching element Q1 and the second switching element Q2 may be switching MOS tubes, or relays, load switches, etc. with switching functions device. Wherein, the first end of the first switching element Q1 is connected to the input power supply 4, and the second end of the first switching element Q1 is respectively connected to the first end of the second switching element Q2 and the first end of the inductor L1; the second switching element The second terminal of Q2 is grounded; the second terminal (or output terminal) of the inductor L1 is connected to the first terminal of the capacitor C1 and the processor 2 , and the second terminal of the capacitor C1 is grounded. This application does not specifically limit the number of inductors L1 and capacitors C1 , for example, the corresponding numbers of inductors L1 and capacitors C1 can be set according to needs, and only one is used as an example in the figure.

In the voltage conversion module 12, when the first switch element Q1 is closed and the second switch element Q2 is turned off, the input power supply 4 stores energy for the inductor L1, and the current flowing through the inductor L1 linearly increases to supply power to the processor 2 and at the same time The capacitor C1 is charged; when the first switch element Q1 is turned off and the second switch element Q2 is turned on, the inductor L1 discharges to the processor 2, the current of the inductor L1 decreases linearly, and at the same time, the capacitor C1 discharges to the processor to maintain the input of the processor 2 current.

As shown in FIG. 1 , the power management module 11 can be connected to the control terminals of the first switch element Q1 and the second switch element Q2 . The power management module 11 can provide a voltage regulation signal to the voltage conversion module 12, so that the voltage conversion module 12 outputs a power supply voltage according to the voltage regulation signal. The voltage regulation signal can be, for example, a pulse width modulation (PWM) signal, which can control the first switching element Q1 and the second switching element Q2, so as to adjust the power supply voltage output by the voltage conversion module 12 to the value required by the processor 2. required supply voltage. Specifically, the voltage conversion module 12 can adjust the time ratio of the first switching element Q1 and the second switching element Q2 to be turned on and off by adjusting the duty cycle of the pulse width in the pulse width modulation signal, thereby adjusting the inductance L1 and The charging and discharging time of the capacitor C1 is used to adjust the power supply voltage output to the processor 2 to ensure the normal operation of the processor.

As mentioned above, the communication module 3 can transmit the demand of the processor 2 for the power supply voltage to the switching power supply 1 . This application does not specifically limit the communication module 3. As shown in FIG. 2, the communication module 3 may be an Adaptive Voltage Scaling (Adaptive Voltage Scaling) module (AVS module for short). The AVS module 3 includes an AVS control unit 31 and an adaptive power controller 32, referred to as APC (Adaptive Power Controller). The AVS control unit 31 in the AVS module 3 can detect the performance change of the processor, and deliver the performance change to the adaptive power supply controller 32, so that it passes the power line interface (Power Wise interface, referred to as the PWI bus) to the processor The performance change is accurately output to the switching power supply 1. The application does not specifically limit the performance change of the processor, for example, it may be a change of the operating frequency of the processor, a change of the temperature of the processor, or a change of the current of the processor. The switching power supply 1 can adjust the power supply voltage it outputs to the processor 2 according to the information, so that the power supply voltage matches the performance of the processor 2 . Specifically, the power management module 11 may provide a voltage regulation signal to the voltage conversion module 12 according to the performance change information of the processor, so as to control the voltage conversion module 12 to output a supply voltage matching the performance of the processor 2 . In some implementations, the AVS module can be embedded in processor 2 .

Generally speaking, in order to ensure that the processor 2 can work safely and stably, the switching power supply 1 will provide the processor with a power supply voltage higher than the theoretically optimal working voltage of the processor according to the output of the AVS module, and then pass the AVS The APC in the module adjusts the supply voltage to the theoretically optimal operating voltage of the processor. APC will adjust the power supply voltage according to the different temperatures and frequencies of the processor. Specifically, the APC adjusts the power supply voltage by slowly dropping the multi-level voltage until the power supply voltage is adjusted to the processor Theoretical optimal working voltage. Taking Figure 3 as an example, at time t1, the theoretical optimal operating voltage of processor 2 should be 2V, but for the safe operation of the processor, the AVS module will first apply for a power supply voltage of 3V like switching power supply 1, and then The APC in the AVS module will reduce the power supply voltage with the stepped multi-level value in the figure, and finally make the power supply voltage of the processor 2V at time t2.

However, since the switching frequency of the first switching element Q1 and the second switching element Q2 in the commonly used switching power supply 1 is generally 3MHz-6MHz, the change of the switching frequency is limited to a certain extent. Therefore, by changing the switching frequency of the switching power supply The settling time to provide the power supply voltage to the processor is generally longer due to the frequency. Since the voltage adjustment process of the AVS module is limited by this settling time, in order to adapt to the settling time, the voltage regulation interval set by the AVS module will also be relatively long. It can be seen from this that the overall adjustment time for the power supply voltage of the processor is relatively long, so that the processor stays at each adjusted voltage higher than the theoretical optimal operating voltage for a longer time, which increases the processor's operating time at higher voltages. Working time, thus increasing the working loss of the processor.

In view of this, the present application proposes a power supply circuit for powering the processor. The switching frequency of the switching power supply of the power supply circuit is greater than 10MHz, so that the switching power supply can be quickly output according to the voltage demand of the processor output by the AVS module. Stabilize the power supply voltage to the power supply voltage value required by the processor, so that the adaptive adjustment time of the AVS module is correspondingly shortened to effectively reduce the working loss of the processor

The power supply circuit provided by the embodiment of the present application will be described in detail below with reference to FIG. 4 and FIG. 5 .

Referring to FIG. 4 and FIG. 5 , the power supply circuit 40 supplies power to the processor 41 , and the power supply circuit 40 may include an AVS module 42 and a switching power supply 43 .

The processor 41 may be the processor 2 described in the foregoing embodiments.

The AVS module 42 is used to monitor and output the performance of the processor 41. The performance of the processor 41 may be, for example, the operating frequency of the processor and/or the temperature of the processor. The AVS module 42 here is the same as the AVS module 3 described in the previous embodiments, and will not be repeated here. The AVS module 42 in FIG. 5 is embedded in the processor 41 .

The switching power supply 43 is used to adjust the power supply voltage provided to the processor 41 according to the output of the AVS module. The present application does not specifically limit the structure of the switching power supply 43 , for example, it may be the switching power supply 1 as shown in FIG. 1 . The difference is that the switching frequency of the switching power supply in this embodiment is greater than 10 MHz.

In the embodiment of the present application, by setting the switching frequency adopted by the switching power supply of the power supply circuit to be greater than 10MHz, the switching power supply can quickly stabilize the power supply voltage to the power supply voltage value required by the processor according to the output of the AVS module, so that the AVS module The self-adaptive adjustment time is correspondingly shortened to effectively reduce the working loss of the processor.

It can be seen from the foregoing that the function of the switching power supply 43 is to adjust the power supply voltage provided to the processor according to the output of the AVS module. That is to say, the power supply voltage output by the switching power supply 43 at the current moment is different from the power supply voltage required by the processor at the next moment, and it is necessary to adjust the power supply voltage value from the power supply voltage value output at the current moment to the next moment. The value of the supply voltage required by the processor at one moment.

In order to effectively adjust the supply voltage, as shown in FIG. 5 , the switching power supply 43 may include a power management module 431 , a voltage conversion module 432 and a feedback module 433 .

The power management module 431 can provide a voltage regulation signal to the voltage conversion module 432 through the feedback signal of the feedback module 433 and/or the performance of the processor output by the aforementioned AVS module 3, so that the voltage conversion module 432 outputs the power supply voltage according to the voltage regulation signal , so that the power supply voltage output by the voltage conversion module 432 is the power supply voltage required by the processor 41 . The present application does not specifically limit the manner in which the power management module 431 provides the voltage regulation signal. For example, the performance of the processor indicates that the temperature of the processor is rising, and the power management module 431 provides a voltage regulation signal for reducing the power supply voltage according to the information; as another example, the performance of the processor indicates the operation of the processor When the frequency rises, the power management module provides a voltage regulation signal to increase the power supply voltage according to the information; for another example, the feedback signal indicates that the output voltage of the voltage conversion module 432 is lower than the power supply voltage required by the processor, and the power management module according to This information provides a voltage regulation signal to boost the supply voltage. In another specific implementation, the power management module 431 may provide a voltage regulation signal for the voltage conversion module 432 according to at least one of the performance indicators of the processor and/or the feedback signal. The power management module 431 may be the power management module 11 in the foregoing embodiments, and the voltage conversion module 432 may be the voltage conversion module 12 in the foregoing embodiments.

The power management module 431 can be connected with the output terminal V _O of the voltage conversion module 432 to output the power supply voltage through the feedback module 433 . The feedback module 433 is used to monitor the supply voltage output by the voltage conversion module 432 (ie, the voltage of the output terminal V _O ), and generate a feedback signal according to the supply voltage and the supply voltage actually required by the processor 41 .

The present application does not specifically limit the way of obtaining the feedback signal. For example, the feedback module 433 may include a comparator for comparing the power supply voltage output by the voltage conversion module 432 with a reference voltage, and comparing the power supply voltage with the reference voltage. The comparison result is used as a feedback signal. The feedback module 433 then transmits the feedback signal to the power management module 431 . The output power supply voltage of the voltage conversion module 432 monitored by the feedback module 433 can be understood as the power supply voltage output by the voltage conversion module 432 at the moment, and the reference voltage can be the power supply voltage actually required by the processor 41, or can be understood as The supply voltage required at the next moment. The power supply voltage required by the processor 41 at the next moment can be known through the output of the AVS module. The feedback signal may be information indicating how the power management module 431 adjusts the voltage conversion module 432 . For example, the feedback signal can also be a pulse width modulation signal, and the power management module 431 can adjust the conduction of the first switch element Q1 and the second switch element Q2 in the voltage conversion module 432 according to the duty cycle of the pulse width modulation signal. and disconnection time ratio.

The present application does not specifically limit the structure of the feedback module 433. For example, the feedback module 433 may be a feedback module based on voltage control, or may also be a feedback module based on current control (for example, a feedback module based on peak current, or a feedback module based on average current feedback module), or it can also be a feedback module based on hysteretic control.

As an implementation manner, as shown in FIG. 6 , the feedback module 433 is a feedback module based on voltage control. The feedback module 433 may include an error amplifier 434 , a compensation module 435 and a PWM comparator 436 .

The error amplifier 434 can also be called an error comparator, and is used to compare the supply voltage output by the switching power supply with a reference voltage, and output the comparison result. The error amplifier 434 may include an input terminal V _in , a reference terminal V _REF and an output terminal V _out . The input terminal V _in can be connected to the output terminal V _O of the voltage conversion module 432 to obtain the supply voltage output by the voltage conversion module 432 at the current moment. The reference terminal V _REF can be used to receive the reference voltage REF, which can be the power supply voltage required by the processor 41 at the next moment. The output terminal u _out can be used to output a comparison result between the output voltage of the output terminal _VO of the voltage conversion module 432 and the reference voltage REF.

The compensation module 435 can also be called an error compensator, which is used to compensate errors caused by environmental factors and device characteristics, so as to enhance the stability and transient response of the circuit. The compensation module 435 may be a filter capacitor or an intelligent calculation module for compensation. The compensation module 435 can correct the above comparison results to avoid errors caused by environmental factors and the characteristics of each device in the comparison results.

The pulse width modulation comparator 436 is used to compare the comparison result corrected by the compensation module 435 with the triangular wave, and output a pulse width modulation signal according to the comparison result. The PWM comparator 436 may also include an input terminal V _C , a reference terminal _VR and an output terminal V _out . The input terminal V _C is connected to the output of the compensation module 435 for receiving the comparison result output by the compensation module 435 . The reference terminal _VR is used to receive the reference triangle wave. The output terminal V _out is used to output a feedback signal determined according to the comparison result and the reference triangle wave, for example, a pulse width modulation signal. Specifically, the moment when the triangular wave is 0 corresponds to the beginning of the first switching tube cycle. At this time, when the voltage value on the triangular wave is less than the comparison result, the pulse width modulation comparator 436 outputs a high level, and along with the voltage on the triangular wave The rise of the value will eventually be equal to the comparison result. At this time, the pulse width modulation comparator 436 outputs a low level to obtain a pulse width modulation signal. The high level in the pulse width modulation signal can turn on the first switch tube Q1, and turn off the second switch tube Q2; the low level in the pulse width modulation signal can make the first switch tube Q1 be turned off, and the second switch tube Q2 can be turned off. The second switching tube Q2 is turned on.

The feedback module 433 formed by the error amplifier 434, the compensation module 435 and the pulse width modulation comparator 436 can make the control of the feedback loop simple and the noise immunity is good.

As another implementation manner, as shown in FIG. 5 , the feedback module 433 is a feedback module based on hysteresis control. The feedback module 433 may include a voltage divider 437 and a comparator 438 .

The voltage divider 437 is used to receive the power supply voltage of the output terminal _VO of the voltage conversion module 432, and divide the power supply voltage. The voltage divider 437 may be a resistor divider. As an example, as shown in FIG. 8 , the voltage divider 53 may include a first voltage dividing resistor R _F1 and a second voltage dividing resistor R _F2 . The first voltage dividing resistor R _F1 and the second voltage dividing resistor R _F2 are connected in series, and their series connection point forms a subsequent voltage output terminal V _out for comparison. The other end of the first voltage dividing resistor R _F1 is connected to the output terminal V _O of the voltage conversion module 432 , and the other end of the second voltage dividing resistor R _F2 is grounded.

The comparator 438 may be a hysteresis comparator for comparing the supply voltage with the reference voltage, and transmit the comparison result of the supply voltage and the reference voltage to the power management module 431 as a feedback signal. Specifically, the comparator 438 may include an input terminal V _FB , a reference terminal V _REF and an output terminal V _out , the input terminal V _FB of the comparator 438 is connected to the above-mentioned voltage output terminal V _out for comparison, and is used to receive the divided voltage The voltage value after the voltage divider 437 divides the power supply voltage of the output terminal V _O of the voltage conversion module 432 at the current moment (for example, the power supply voltage of the output terminal V _O of the voltage conversion module 432 at the current moment is V1, then the voltage divider The voltage output by 437 is V1*R2 (R1+R2).The reference terminal V _REF is used to receive the reference voltage and can be used to receive the reference voltage REF. The reference voltage can be that the power supply voltage required by the processor 41 at the next moment is equally divided The final voltage value (for example, the power supply voltage required by the processor 41 at the next moment is V2, then the reference voltage is V2*R2 (R1+R2)). The output terminal V _out of the comparator 438 is used to output according to the above-mentioned divided voltage The final voltage value and the reference voltage determine the feedback signal, for example, it can be a pulse width modulation signal. Specifically, when the voltage value after the above-mentioned divided voltage is greater than the reference voltage, the comparator 438 outputs a low level, and when the above-mentioned divided voltage When the voltage value is less than the reference voltage, the comparator 438 outputs a high level. The high level in the pulse width modulation signal can make the first switching tube Q1 conduction, and the second switching tube Q2 is turned off; The low level of the first switching tube Q1 can be turned off, and the second switching tube Q2 can be turned on.

Setting the feedback module 433 as a feedback module based on hysteresis control can directly monitor the output power supply voltage through the comparator, thereby avoiding the transmission delay caused by the error amplifier and compensator, and greatly improving the speed of transient response. At the same time, due to the addition of a voltage divider in the feedback module, the comparator in the feedback module can compare the divided voltage value based on the voltage divider, thereby avoiding the influence of the environment or electronic devices in the power supply circuit, effectively The stability of the feedback module is improved.

Further, as shown in FIG. 5, the series equivalent resistance R _ESR can be added to the branch of the capacitor C1, so that when the operating frequency of the processor 41 happens to happen, it will immediately fluctuate and trigger the action of the feedback module, thereby improving the The speed of transient response.

In the power supply circuit provided by the embodiment of the present application, since the switching frequency of the switching power supply is greater than 10 MHz and its feedback module can be a feedback module based on hysteresis control, the switching power supply can provide a stable power supply voltage according to the needs of the processor. The time required is greatly shortened. This will be described in detail below with reference to FIG. 7 . Fig. 7 is a schematic diagram of the settling time results when the power supply system using different switching power supplies and feedback modules provides a stable power supply voltage for the processor. (a) in FIG. 7 refers to the switching frequency of the switching power supply is 3-6 MHz, and its feedback module is a feedback module composed of an error amplifier and a compensator. (b) in FIG. 7 refers to the switching frequency of the switching power supply is 10 MHz, and its feedback module is the above-mentioned feedback module based on hysteresis control. It can be seen from Figure 7(a) that when the power supply voltage at this moment is 0.12V, and the power supply voltage required by the processor at the next moment is 0.88V, the power supply system in Figure 7(a) stabilizes the power supply voltage from 0.12V The time Δx required to reach 0.88V (which can be understood as close to 0V-0.9V) is 1.096ms. And the (b) power supply system in Fig. 7 stabilizes the supply voltage from 0.15V to 0.82V ((can be understood as being close to 0V-0.9V) the required time △ x is 12 μ s. Thus, it can be known that the present application In the power supply circuit provided by the embodiment, the switching power supply in it provides a stable settling time of nearly 100 times when the processor provides the power supply voltage.Limited and this, the adaptive adjustment time of the AVS module can also be greatly shortened, therefore, effective It reduces the working loss of the processor.

The device embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 7 . The method embodiment of the present application is described in detail below with reference to FIG. 8 . It should be understood that the descriptions of the method embodiments correspond to the descriptions of the device embodiments, therefore, for parts not described in detail, reference may be made to the foregoing device embodiments.

FIG. 8 is a schematic flowchart of a power supply method provided by an embodiment of the present application, and the power supply method is used to supply power to a processor. The method in FIG. 8 may be implemented by using the electronic devices shown in FIGS. 4-6 , for example.

Referring to FIG. 8, in step S810, the performance of the processor is monitored and output by using the AVS module.

In step S820, according to the output of the AVS module, the power supply voltage provided to the processor is adjusted through the switching power supply, wherein the switching frequency of the switching power supply is greater than 10 MHz.

Optionally, adjusting the power supply voltage provided to the processor through the switching power supply includes: outputting the power supply voltage through the voltage conversion module according to the voltage regulation signal; monitoring the power supply voltage output by the voltage conversion module through the feedback module to generate a feedback signal; The signal and/or performance of the processor provides a voltage regulation signal for the voltage conversion module through the power management module.

Optionally, the voltage conversion module includes a first switch tube and a second switch tube connected to each other, an inductor is provided between the connection point of the first switch tube and the second switch tube and the voltage output terminal for outputting the supply voltage, and the output of the inductor connected to one end of the capacitor, and the other end of the capacitor is grounded. According to the voltage regulation signal, the voltage conversion module outputs the power supply voltage, including: according to the voltage regulation signal, by controlling the voltage of the first switch tube and the second switch tube in the voltage conversion module. switching frequency and duty cycle to allow the inductor and/or capacitor to output the supply voltage.

Optionally, the feedback module includes: a comparator, the comparator has an input terminal, a reference terminal and an output terminal, and the feedback module monitors the supply voltage output by the voltage conversion module to generate a feedback signal, including: monitoring the voltage through the input terminal of the comparator Converting the supply voltage output by the module; using the reference terminal of the comparator to receive the reference voltage; outputting the comparison result between the supply voltage and the reference voltage as a feedback signal to the power management module through the output terminal of the comparator.

Optionally, monitoring the power supply voltage output by the voltage conversion module through the feedback module includes: monitoring the power supply voltage output by the voltage conversion module through the feedback module based on hysteresis control.

Optionally, the feedback module further includes a voltage divider, the voltage divider includes a first voltage dividing resistor and a second voltage dividing resistor, the first voltage dividing resistor and the second voltage dividing resistor are connected in series, and the other end of the first voltage dividing resistor Connect to the voltage output end of the output power supply voltage, the other end of the second voltage dividing resistor is grounded, the input end of the comparator is connected to the connection point of the first voltage dividing resistor and the second voltage dividing resistor, and the voltage is monitored through the input end of the comparator Converting the power supply voltage output by the module includes: monitoring the voltage of the power supply voltage output by the voltage conversion module through the voltage divider through the input terminal of the comparator.

Optionally, the performance of the processor includes the operating frequency of the processor and/or the temperature of the processor.

The embodiment of the present application also provides an electronic device, including: a processor; an AVS module, used to monitor and output the performance of the processor; a switching power supply, used to adjust the power supply voltage provided to the processor according to the output of the AVS module, wherein , The switching frequency of the switching power supply is greater than 10MHz. It can be understood that the processor, AVS module, and switching power supply in the electronic device are the same as those described above, and will not be repeated here.

The embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the computer storage medium, and when the computer program is executed, the foregoing method steps are realized.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be read by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) )wait.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (16)

A power supply circuit for powering a processor, characterized in that it comprises: AVS module for monitoring and outputting the performance of the processor; A switching power supply is used to adjust the power supply voltage provided to the processor according to the output of the AVS module, wherein the switching frequency of the switching power supply is greater than 10MHz. The power supply circuit according to claim 1, wherein the switching power supply comprises: a voltage conversion module, configured to output the supply voltage according to the voltage regulation signal; a feedback module, configured to monitor the supply voltage output by the voltage conversion module to generate a feedback signal; The power management module is configured to provide the voltage regulation signal to the voltage conversion module according to the feedback signal and/or the performance of the processor. The power supply circuit according to claim 2, wherein the voltage conversion module includes a first switch tube and a second switch tube connected to each other, and the connection point between the first switch tube and the second switch tube is connected to the An inductance is provided between the voltage output terminals that output the supply voltage, the output terminal of the inductance is connected to one end of the capacitor, and the other end of the capacitor is grounded, and the voltage conversion module controls the first The switching frequency and duty cycle of the first switching tube and the second switching tube are used to make the inductor and/or the capacitor output the supply voltage. The power supply circuit according to claim 2, wherein the feedback module comprises: A comparator has an input terminal, a reference terminal and an output terminal, the input terminal of the comparator is used for monitoring the supply voltage, the reference terminal of the comparator is used for receiving a reference voltage, and the output terminal of the comparator is used for Outputting the comparison result between the supply voltage and the reference voltage as the feedback signal to the power management module. The power supply circuit according to claim 4, wherein the feedback module is a feedback module based on hysteresis control. The power supply circuit according to claim 5, wherein the feedback module further comprises a voltage divider, the voltage divider comprises a first voltage dividing resistor and a second voltage dividing resistor, the first voltage dividing resistor and the The second voltage-dividing resistors are connected in series, the other end of the first voltage-dividing resistor is connected to the voltage output terminal that outputs the supply voltage, the other end of the second voltage-dividing resistor is grounded, and the input of the comparator The terminal is connected to the connection point of the first voltage dividing resistor and the second voltage dividing resistor, so as to monitor the voltage of the power supply voltage after being divided by the voltage divider. The power supply circuit according to claim 1, wherein the performance of the processor includes the operating frequency of the processor and/or the temperature of the processor. A method for supplying power to a processor, wherein the method comprises: Using the AVS module to monitor and output the performance of the processor; According to the output of the AVS module, the power supply voltage provided to the processor is adjusted through a switching power supply, wherein the switching frequency of the switching power supply is greater than 10 MHz. The power supply method according to claim 8, wherein the adjusting the power supply voltage provided to the processor through the switching power supply comprises: Outputting the power supply voltage through a voltage conversion module according to the voltage regulation signal; monitoring the supply voltage output by the voltage conversion module through a feedback module to generate a feedback signal; According to the feedback signal and/or the performance of the processor, the power management module provides the voltage regulation signal to the voltage conversion module. The power supply method according to claim 9, wherein the voltage conversion module includes a first switch tube and a second switch tube connected to each other, and the connection point between the first switch tube and the second switch tube is connected to the An inductance is provided between the voltage output terminals that output the supply voltage, the output terminal of the inductance is connected to one end of the capacitor, and the other end of the capacitor is grounded, The outputting the power supply voltage through the voltage conversion module according to the voltage regulation signal includes: According to the voltage regulation signal, by controlling the switching frequency and duty cycle of the first switch tube and the second switch tube in the voltage conversion module, the inductor and/or the capacitor output the the supply voltage described above. The power supply method according to claim 9, wherein the feedback module comprises: a comparator, the comparator has an input terminal, a reference terminal and an output terminal, and the feedback module monitors the output voltage of the voltage conversion module The supply voltage to generate the feedback signal consists of: monitoring the supply voltage output by the voltage conversion module through the input terminal of the comparator; receiving a reference voltage using a reference terminal of the comparator; The comparison result between the supply voltage and the reference voltage is output to the power management module as the feedback signal through the output terminal of the comparator. The power supply method according to claim 11, wherein the monitoring the power supply voltage output by the voltage conversion module through a feedback module comprises: The supply voltage output by the voltage conversion module is monitored by a feedback module based on hysteresis control. The power supply method according to claim 12, wherein the feedback module further comprises a voltage divider, the voltage divider comprises a first voltage dividing resistor and a second voltage dividing resistor, the first voltage dividing resistor and the The second voltage-dividing resistors are connected in series, the other end of the first voltage-dividing resistor is connected to the voltage output terminal that outputs the supply voltage, the other end of the second voltage-dividing resistor is grounded, and the input of the comparator The terminal is connected to the connection point of the first voltage dividing resistor and the second voltage dividing resistor, The monitoring of the supply voltage output by the voltage conversion module through the input terminal of the comparator includes: The voltage of the power supply voltage output by the voltage conversion module after being divided by the voltage divider is monitored through the input terminal of the comparator. The power supply method according to claim 8, wherein the performance of the processor includes an operating frequency of the processor and/or a temperature of the processor. An electronic device, characterized in that it comprises: processor; AVS module for monitoring and outputting the performance of the processor; A switching power supply is used to adjust the power supply voltage provided to the processor according to the output of the AVS module, wherein the switching frequency of the switching power supply is greater than 10MHz. A computer-readable storage medium, wherein the computer storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 8-14 is implemented.

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