CN118137824A - Power supply control system and method - Google Patents

Abstract

The disclosure provides a power supply control system and a method, which can be applied to the technical field of integrated circuit design. The system comprises: the power supply system comprises an electric quantity sensing module, a performance sensing module, a minimum energy point tracking module and a mode control module, wherein the electric quantity sensing module is configured to collect power supply voltage data of a power supply at the current moment; the performance sensing module is configured to determine a first operating voltage based on a priority of the interrupt task in response to the interrupt task being triggered, and send the first operating voltage to the mode control module; the minimum energy point tracking module is configured to determine a second working voltage based on the power supply voltage data and send the second working voltage to the mode control module if the interrupt task is not triggered or if the interrupt task has been completed; the mode control module is configured to generate a voltage control signal based on the supply voltage data, the first operating voltage, or the second operating voltage, and to control an output voltage of the power supply using the voltage control signal.

Description

Power supply control system and method

Technical Field

The present disclosure relates to the technical field of integrated circuit design, and more specifically, to a power supply control system and method.

Background technique

With the growing research interest and rapid development in areas such as wireless sensor nodes, healthcare devices, green and efficient industries, smart homes and cities, chips such as System on Chip (SOC) mostly need to use batteries with smallest form factor and decades of service life with minimal maintenance to stay active.

In order to optimize the power consumption and performance of SoC chips, dynamic voltage and frequency scaling (DVFS), duty cycle control, multi-mode control, etc. are usually used. However, in the pursuit of low power consumption, blindly reducing the voltage will increase circuit delay, thereby shortening the service life of the SoC chip.

Public Content

In view of this, the present disclosure provides a power control system and method.

One aspect of the present disclosure provides a power control system, including: a power sensing module, a performance sensing module, a minimum energy point tracking module, and a mode control module, wherein the power sensing module is configured to collect the power supply voltage data of the power supply at the current moment, and send the power supply voltage data to the minimum energy point tracking module and the mode control module respectively; the performance sensing module is configured to determine a first working voltage based on the priority of the interrupt task in response to an interrupt task being triggered, and send the first working voltage to the mode control module; the minimum energy point tracking module is configured to determine a second working voltage based on the power supply voltage data when the interrupt task is not triggered or the interrupt task is completed, and send the second working voltage to the mode control module; the mode control module is configured to generate a voltage control signal based on the power supply voltage data, the first working voltage or the second working voltage, and use the voltage control signal to control the output voltage of the power supply.

According to an embodiment of the present disclosure, the minimum energy point tracking module includes a counting unit and a minimum energy point tracking unit. The timing unit is configured to obtain a first digital clock cycle corresponding to the power supply voltage of the power supply at the current moment based on the power supply voltage data when the interrupt task is not triggered or the interrupt task is completed, adjust the power supply voltage of the power supply at the current moment based on a preset voltage threshold, obtain a new power supply voltage of the power supply at the current moment, and obtain a second digital clock cycle corresponding to the new power supply voltage of the power supply at the current moment; the minimum energy point tracking unit is configured to compare the first digital clock cycle and the second digital clock cycle output by the timing unit to obtain a comparison result. If the comparison result indicates that the first digital clock cycle is less than the second digital clock cycle, the power supply voltage of the power supply at the current moment is updated to the new power supply voltage of the power supply at the current moment, and the new power supply voltage of the power supply at the current moment is adjusted again based on the preset voltage threshold; if the comparison result indicates that the first digital clock cycle is greater than or equal to the second digital clock cycle, the power supply voltage of the power supply at the current moment is determined as the second working voltage, and the second working voltage is sent to the mode control module.

According to an embodiment of the present disclosure, the above-mentioned performance perception module includes multiple input/output interfaces, and the above-mentioned input/output interfaces are configured to receive the above-mentioned interrupt tasks; wherein, the above-mentioned performance perception module is configured to determine the priority of the above-mentioned interrupt task based on the priority attribute of the above-mentioned target input/output interface when the target input/output interface receives the above-mentioned interrupt task, determine the first operating voltage corresponding to the above-mentioned interrupt task based on the priority of the above-mentioned interrupt task, and send the first operating voltage to the above-mentioned mode control module, wherein the above-mentioned target input/output interface belongs to the above-mentioned multiple input/output interfaces.

According to an embodiment of the present disclosure, the above-mentioned voltage control signal includes a first voltage control signal and a second voltage control signal; when the above-mentioned interrupt task is triggered, the above-mentioned mode selection unit is configured to: when the above-mentioned first working voltage is greater than or equal to the power supply voltage of the power supply at the above-mentioned current moment corresponding to the above-mentioned power supply voltage data, generate the above-mentioned first voltage control signal, wherein the above-mentioned first voltage control signal is used to maintain the output voltage of the above-mentioned power supply so that the output voltage of the above-mentioned power supply is equal to the power supply voltage of the power supply at the above-mentioned current moment; when the above-mentioned first working voltage is less than the power supply voltage of the power supply at the current moment corresponding to the above-mentioned power supply voltage data, generate the above-mentioned second voltage control signal, wherein the above-mentioned second voltage control signal is used to downwardly regulate the output voltage of the above-mentioned power supply.

According to an embodiment of the present disclosure, the above-mentioned voltage control signal also includes a third control signal; when the above-mentioned interrupt task is not triggered or the above-mentioned interrupt task is completed, the above-mentioned mode selection unit is configured to: generate the above-mentioned third voltage control signal based on the above-mentioned second working voltage, so that the output voltage of the above-mentioned power supply is equal to the above-mentioned second working voltage.

According to an embodiment of the present disclosure, the power control system further includes a sleep standby module, which is configured to, when monitoring that the power supply voltage of the power supply at the current moment does not meet the reference voltage threshold, shut down the switching power domain power supply, charge the power supply using an energy collector, and restore the switching power domain power supply when detecting that the power supply voltage of the power supply at the current moment meets the reference voltage threshold.

Another aspect of the present disclosure provides a power control method applied to the above-mentioned system, including: collecting power supply voltage data of the power supply at the current moment; in response to an interrupt task being triggered, determining a first operating voltage based on the priority of the above-mentioned interrupt task; when the above-mentioned interrupt task is not triggered or the above-mentioned interrupt task has been completed, determining a second operating voltage based on the above-mentioned power supply voltage data; based on the above-mentioned power supply voltage data, the above-mentioned first operating voltage or the above-mentioned second operating voltage, generating a voltage control signal, and using the above-mentioned voltage control signal to control the output voltage of the above-mentioned power supply.

According to an embodiment of the present disclosure, when the interrupt task is not triggered or the interrupt task is completed, determining the second working voltage based on the power supply voltage data includes: when the interrupt task is not triggered or the interrupt task is completed, obtaining a first digital clock cycle corresponding to the power supply voltage of the power supply at the current moment based on the power supply voltage data; adjusting the power supply voltage of the power supply at the current moment based on a preset voltage threshold to obtain a new power supply voltage of the power supply at the current moment, and obtaining a second digital clock cycle corresponding to the new power supply voltage of the power supply at the current moment; comparing the first digital clock cycle with the second digital clock cycle to obtain a comparison result, if the comparison result indicates that the first digital clock cycle is less than the second digital clock cycle, updating the power supply voltage of the power supply at the current moment to the new power supply voltage of the power supply at the current moment, and adjusting the new power supply voltage of the power supply at the current moment again based on the preset voltage threshold, if the comparison result indicates that the first digital clock cycle is greater than or equal to the second digital clock cycle, determining the power supply voltage of the power supply at the current moment as the second working voltage.

According to an embodiment of the present disclosure, in response to an interrupt task being triggered, determining the first operating voltage based on the priority of the interrupt task and the power supply voltage data includes: in a case where the target input/output interface receives the interrupt task, determining the priority of the interrupt task based on the priority attribute of the target input/output interface; and determining the first operating voltage corresponding to the interrupt task based on the priority of the interrupt task and the power supply voltage data.

According to an embodiment of the present disclosure, the voltage control signal is generated based on the power supply voltage data, the first working voltage or the second working voltage, and the output voltage of the power supply is controlled by the voltage control signal, including: the voltage control signal includes a first voltage control signal, a second voltage control signal and a third voltage control signal; when the interrupt task is triggered, when the first working voltage is greater than or equal to the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, the first voltage control signal is generated, wherein the first voltage control signal is used to maintain the output voltage of the power supply so that the output voltage of the power supply is equal to the power supply voltage of the power supply at the current moment; when the first working voltage is less than the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, the second voltage control signal is generated, wherein the second voltage control signal is used to adjust the output voltage of the power supply downward; when the interrupt task is not triggered or the interrupt task is completed, the third voltage control signal is generated based on the second working voltage so that the output voltage of the power supply is equal to the second working voltage; and the output voltage of the power supply is controlled by the voltage control signal.

According to an embodiment of the present disclosure, in a power control system provided with a power sensing module, a performance sensing module, a minimum energy point tracking module, and a mode control module, a voltage control signal is generated based on the power supply voltage data at the current moment and the actual operation status of the chip. When processing an interrupt task, the output voltage of the power supply is dynamically adjusted through the voltage control signal, thereby ensuring the efficient operation of the power control system. When waiting for an interrupt task, the dynamic power consumption and static power consumption of the system are reduced through the voltage control signal, thereby extending the battery life and the service life of the chip.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

FIG1 schematically shows a structural block diagram of a power supply control system according to an embodiment of the present disclosure;

FIG2 schematically shows a structural block diagram of a power supply control system according to a specific embodiment of the present disclosure;

FIG3 schematically shows a schematic diagram of a power supply control system according to a specific embodiment of the present disclosure;

FIG4 schematically shows a flow chart of a power supply control method according to an embodiment of the present disclosure;

FIG5 schematically shows a voltage variation diagram of a power supply control method according to a specific embodiment of the present disclosure.

Detailed ways

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the above-mentioned features, steps, operations and/or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

When using expressions such as "at least one of A, B, and C", they should generally be interpreted according to the meaning of the expression commonly understood by technical personnel in this field (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and/or A, B, C, etc.).

Currently, with the growing research interest and rapid development in the fields of wireless sensor nodes, healthcare devices, green and efficient industries, smart homes and cities, chips such as System on Chip (SOC) need to work autonomously with energy harvesters to directly use energy from the environment or to stay active by using batteries with minimal form factor and decades of service life with minimal maintenance.

Therefore, power extension technology is chosen in Internet of Things (IoT) SoC chips to extend the service life of the chips, especially when these devices are powered by energy harvesters that are shrinking in size. Since the energy storage nodes are small, the form factor is minimized, allowing the active power of IoT SoC chips to be reduced from milliwatts to microwatts, nanowatts, and even picowatts.

In order to optimize the power consumption and performance of SoC chips, existing technologies usually adopt dynamic voltage and frequency scaling (DVFS), duty cycle control, multi-mode control and other methods. The optimal energy consumption of each operation in a digital circuit can be achieved by using power supply voltage or subthreshold power supply voltage. However, in the pursuit of low power consumption, blindly reducing the voltage will increase circuit delay, thereby shortening the service life of the SoC chip.

In view of this, the embodiments of the present disclosure construct a power control system equipped with a power sensing module, a performance sensing module, a minimum energy point tracking module, and a mode control module, and generate a voltage control signal based on the power supply voltage data at the current moment and the actual operation status of the chip. When processing an interrupt task, the output voltage of the power supply is dynamically adjusted through the voltage control signal, thereby ensuring the efficient operation of the power control system. When waiting for an interrupt task, the dynamic power consumption and static power consumption of the system are reduced through the voltage control signal, thereby extending the battery life and the service life of the chip.

Specifically, the embodiment of the present disclosure provides a power control system and method. The system includes a mode control module, a power sensing module, a performance sensing module, and a minimum energy point tracking module. The power sensing module is configured to collect the power supply voltage data of the power supply at the current moment, and send the power supply voltage data to the minimum energy point tracking module and the mode control module respectively; the performance sensing module is configured to respond to the interrupt task being triggered, based on the priority and power supply voltage data of the interrupt task, determine the first working voltage, and send the first working voltage to the mode control module; the minimum energy point tracking module is configured to determine the second working voltage based on the power supply voltage data when the interrupt task is not triggered or the interrupt task is completed, and send the second working voltage to the mode control module; the mode control module is configured to generate a voltage control signal based on the power supply voltage data, the first working voltage or the second working voltage, and use the voltage control signal to control the output voltage of the power supply.

It should be noted that, unless it is explicitly stated that there is a sequence of execution between different operations shown in the flowchart in the embodiments of the present disclosure, or there is a sequence of execution between different operations in technical implementation, otherwise, the execution order of multiple operations may not be prioritized, and multiple operations may also be executed simultaneously.

FIG1 schematically shows a structural block diagram of a power supply control system according to an embodiment of the present disclosure.

As shown in FIG. 1 , the power control system includes a power sensing module 110 , a performance sensing module 120 , a minimum energy point tracking module 130 , and a mode control module 140 .

According to an embodiment of the present disclosure, the power sensing module 110 is configured to collect the power supply voltage data of the power supply at the current moment, and send the power supply voltage data to the minimum energy point tracking module 130 and the mode control module 140 respectively, wherein the power supply voltage data may include the power supply voltage of the power supply at the current moment, the power supply reference voltage, the remaining power of the power supply at the current moment and other data.

According to an embodiment of the present disclosure, since the IoT SoC chip is powered by a battery, the power sensing module 110 can be used to adjust the power and performance of the system based on the battery consumption over a long period of time and the remaining power.

According to an embodiment of the present disclosure, the performance perception module 120 is configured to determine a first operating voltage in response to an interrupt task being triggered based on the priority of the interrupt task, and send the first operating voltage to the mode control module 140, wherein the interrupt task may come from an external device, and the first operating voltage may be used to characterize the voltage required for the system to process the interrupt task determined according to the priority of the interrupt task.

According to an embodiment of the present disclosure, the performance awareness module 120 may be configured to adjust the power and performance of the system based on different priorities of interrupt tasks.

According to an embodiment of the present disclosure, the minimum energy point tracking module 130 is configured to determine the second operating voltage based on the power supply voltage data and send the second operating voltage to the mode control module when the interrupt task is not triggered or the interrupt task is completed. The second operating voltage can be used to characterize the low-power operating voltage corresponding to the minimum dynamic energy point determined by the minimum energy point tracking module 130 when the system is waiting for other terminal tasks.

According to an embodiment of the present disclosure, in the minimum energy point tracking module 130, a ramp tracking algorithm can be used to gradually approach the minimum dynamic power consumption point based on the power supply voltage data at the current moment, thereby determining a low-power operating voltage corresponding to the minimum dynamic power consumption point.

According to an embodiment of the present disclosure, the mode control module 140 is configured to generate a voltage control signal based on the power supply voltage data, the first operating voltage or the second operating voltage, and use the voltage control signal to control the output voltage of the power supply.

An embodiment of the present disclosure provides a power control system provided with a power sensing module, a performance sensing module, a minimum energy point tracking module, and a mode control module. A voltage control signal is generated based on the power supply voltage data at the current moment and the actual operation status of the chip. When processing an interrupt task, the output voltage of the power supply is dynamically adjusted through the voltage control signal, thereby ensuring the efficient operation of the power control system. When waiting for an interrupt task, the dynamic power consumption and static power consumption of the system are reduced through the voltage control signal, thereby extending the battery life and the service life of the chip.

According to an embodiment of the present disclosure, the minimum energy point tracking module includes a counting unit and a minimum energy point tracking unit. The timing unit is configured to obtain a first digital clock cycle corresponding to the power supply voltage of the power supply at the current moment based on the power supply voltage data when the interrupt task is not triggered or the interrupt task is completed, and adjust the power supply voltage of the power supply at the current moment based on a preset voltage threshold to obtain a new power supply voltage of the power supply at the current moment, and obtain a second digital clock cycle corresponding to the new power supply voltage of the power supply at the current moment; the minimum energy point tracking unit is configured to compare the first digital clock cycle and the second digital clock cycle output by the timing unit to obtain a comparison result. If the comparison result indicates that the first digital clock cycle is greater than or equal to the second digital clock cycle, the power supply voltage of the power supply at the current moment is updated to the new power supply voltage of the power supply at the current moment, and the new power supply voltage of the power supply at the current moment is adjusted again based on the preset voltage threshold; if the comparison result indicates that the first digital clock cycle is less than the second digital clock cycle, the power supply voltage of the power supply at the current moment is determined as the second working voltage, and the second working voltage is sent to the mode switching module.

According to an embodiment of the present disclosure, when the interrupt task is not triggered or the interrupt task is completed, the mode switching module switches the mode to the minimum energy point tracking mode, and the minimum energy point tracking module starts to run.

According to an embodiment of the present disclosure, the minimum energy point tracking module at least includes a timing unit and a minimum energy point tracking unit.

According to an embodiment of the present disclosure, the timing unit can be configured to be based on the power supply voltage data and reference voltage of the power supply at the current moment sent by the power sensing module, and the minimum energy point tracking unit can set the voltage to the highest value of the power supply voltage of the power supply at the current moment, and perform multiple rounds of adjustments to the power supply voltage of the power supply at the current moment until the low power consumption voltage condition is met.

Specifically, the supply voltage of the power supply at the current moment can be used as the initial voltage, and the first timer in the timing unit can be used to record the first digital clock cycle of the power supply at the initial voltage. Based on a preset voltage threshold, the initial voltage can be adjusted downward to obtain a new supply voltage of the power supply at the current moment, and the second timer in the timing unit can be used to record the second digital clock cycle of the power supply at the new supply voltage of the power supply at the current moment.

For example, for a DC-DC converter, the digital clock cycle can represent the ripple voltage output by the DC-DC converter, and the variation amplitude of the ripple voltage can be configured to be 10mV. If the initial voltage is configured to be 0.65V, when the capacitor in the DC-DC converter circuit is charged to 0.66V, then discharged and consumed to 0.65V, it starts charging again. The clock cycle from 0.66V to 0.65V can be used as the first digital clock cycle.

According to an embodiment of the present disclosure, the first digital clock cycle can be used to characterize the ripple period of the initial voltage, the second digital clock cycle can be used to characterize the ripple period of the power supply voltage of the power supply at the new current moment, and both the first digital clock cycle and the second digital clock cycle can be used to characterize the time the circuit consumes energy under different power supply voltages.

According to an embodiment of the present disclosure, the preset voltage threshold can be used to characterize a preset downward voltage value. For example, the preset voltage threshold can be set to 0.1v, and if the initial voltage is 0.65v, the initial voltage is adjusted downward according to the preset voltage threshold, and the new power supply voltage of the power supply at the current moment is 0.64v.

According to an embodiment of the present disclosure, since the SoC chip includes multiple switching power domains and each switching power domain contains one or more functional core modules, when the system switches to the minimum energy point tracking mode, it is impossible to confirm the disconnection of each switching power domain inside the current SoC chip. Therefore, the minimum power consumption voltage corresponding to the minimum energy point can be calculated through the minimum energy point tracking unit.

According to an embodiment of the present disclosure, the minimum energy point tracking unit can be configured to compare the first digital clock cycle and the second digital clock cycle output by the timing unit to obtain a comparison result. If the comparison result indicates that the first digital clock cycle is greater than or equal to the second digital clock cycle, it means that the adjusted new power supply voltage of the power supply at the current moment does not meet the low power consumption voltage condition. The initial voltage can be updated to the new power supply voltage of the power supply at the current moment, and based on the preset voltage threshold, the lowered initial voltage can be adjusted again. This process can be performed for multiple rounds of adjustment until the adjusted new power supply voltage of the power supply at the current moment meets the low power consumption voltage condition.

According to an embodiment of the present disclosure, if the comparison result indicates that the first digital clock cycle is less than the second digital clock cycle, it means that the adjusted new power supply voltage of the power supply at the current moment meets the low power consumption voltage condition, that is, the power supply voltage of the power supply at the current moment can be determined as the second operating voltage, and the second operating voltage is sent to the mode switching module.

The embodiment of the present disclosure uses a minimum energy point tracking module to determine the power supply voltage corresponding to the minimum energy point based on the circuit energy consumption time, i.e., the first digital clock cycle and the second digital clock cycle, and gradually approaches the minimum energy point by reducing the voltage. The determined minimum energy point voltage is used as the second operating voltage, and the second operating voltage is used as the power supply output voltage through the mode control module, thereby reducing the dynamic power consumption and static power consumption of the system.

According to an embodiment of the present disclosure, the performance awareness module includes multiple input/output interfaces, and the input/output interfaces are configured to receive interrupt tasks; wherein, the performance awareness module is configured to determine the priority of the interrupt task based on the priority attribute of the target input/output interface when the target input/output interface receives the interrupt task, determine the first operating voltage corresponding to the interrupt task based on the priority of the interrupt task, and send the first operating voltage to the mode control module, wherein the target input/output interface belongs to multiple input/output interfaces.

According to an embodiment of the present disclosure, an input/output interface can be used to receive interrupt tasks of different priorities, wherein a plurality of input/output interfaces can be configured with different priority attributes. In response to receiving an interrupt task, the performance perception module can determine a target input/output interface for processing the interrupt task by monitoring a plurality of input/output interfaces, and determine the priority of the interrupt task by the priority attribute corresponding to the target input/output interface.

According to an embodiment of the present disclosure, based on the priority corresponding to the interrupt task, a first operating voltage required to process the interrupt task is determined, and a voltage signal mapped with the first operating voltage information is sent to a mode control module.

For example, the input/output interface in the performance perception module includes a general-purpose input/output interface (GPIO) and a serial peripheral interface (SPI). The priority corresponding to the GPIO interface is high priority, and the priority corresponding to the serial peripheral interface is low priority. When the performance perception module monitors that the interrupt task is processed by the GPIO interface, it can be determined that the priority corresponding to the interrupt task is high priority, that is, it can be determined that the operating voltage required to process the high-priority interrupt task is 6v, and the voltage signal mapped with the operating voltage information of 6v is sent to the mode control module.

The embodiments of the present disclosure configure different priority attributes for multiple input/output interfaces in a performance awareness module, and monitor the priority of the interrupt task based on the priority attributes of each input/output interface, so as to determine the first operating voltage required to process the interrupt task, thereby realizing dynamic voltage adjustment and real-time power scaling of the system, thereby improving the working efficiency and performance of the system.

According to an embodiment of the present disclosure, when an interrupt task is triggered, the mode selection unit is configured to: generate a first voltage control signal when the first operating voltage is greater than or equal to the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, wherein the first voltage control signal is used to maintain the output voltage of the power supply so that the output voltage of the power supply is equal to the power supply voltage of the power supply at the current moment; and generate a second voltage control signal when the first operating voltage is less than the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, wherein the second voltage control signal is used to downwardly regulate the output voltage of the power supply.

According to an embodiment of the present disclosure, the mode selection module may include a mode selection unit and a buck conversion unit, wherein the mode selection unit may be configured to generate a voltage control signal based on the received first operating voltage or second operating voltage and supply voltage data, and send the voltage control signal to the buck conversion unit, and the buck conversion unit may be configured to control the inductor to adjust the output voltage by periodically closing and opening a switch based on the voltage control signal. The buck conversion unit may include a buck DC-DC converter.

According to an embodiment of the present disclosure, the output voltage output by the buck conversion unit may be configured to vary based on the magnitude of the power input voltage, and as the input voltage decreases, the output voltage decreases in a gradient.

According to an embodiment of the present disclosure, when an interrupt task is triggered, the voltage control signal includes a first voltage control signal and a second voltage control signal, wherein the first voltage control signal and the second voltage control signal can both be obtained by comparing the first working voltage and the supply voltage data through a mode selection unit.

According to an embodiment of the present disclosure, the mode selection unit compares the power supply voltage at the current moment in the power supply voltage data and the first working voltage. If the first working voltage is greater than or equal to the power supply voltage of the power supply at the current moment, a first voltage control signal can be generated, wherein the first voltage control signal is used to maintain the output voltage of the power supply, that is, to control the step-down converter to maintain the output voltage of the power supply at the power supply voltage of the power supply at the current moment.

For example, the first working voltage for processing the current high-priority interrupt task is 6.2V, and the power supply voltage of the power supply at the current moment is 6V, which means that the maximum voltage that the power supply can provide for processing the high-priority interrupt task at the current moment is 6V. Therefore, a first voltage control signal is generated by comparing the first working voltage and the power supply voltage of the power supply at the current moment. The first voltage control signal is used to control the step-down conversion unit to maintain the output voltage of the power supply at the maximum voltage that the current power supply can provide, that is, maintain it at 6V, so as to process high-priority tasks with maximum power.

According to an embodiment of the present disclosure, the mode selection unit compares the power supply voltage at the current moment in the power supply voltage data and the first working voltage. If the first working voltage is less than the power supply voltage of the power supply at the current moment, a second voltage control signal can be generated, wherein the second voltage control signal is used to downwardly regulate the output voltage of the power supply.

For example, the first working voltage for processing the current low priority interrupt task is 5V, and the power supply voltage of the power supply at the current moment is 6V, which means that the power supply voltage of the power supply at the current moment is sufficient to provide the working voltage for the low priority interrupt task. Therefore, a second voltage control signal is generated by comparing the first working voltage and the power supply voltage of the power supply at the current moment, and the second voltage control signal is used to control the step-down conversion unit to reduce the output voltage of the power supply to 5V to process the low priority interrupt task.

In an embodiment of the present disclosure, when an interrupt task is triggered, the mode selection unit generates different voltage control signals based on the power supply voltage data sent by the power sensing module and the first working voltage data sent by the performance sensing module to dynamically adjust the output voltage of the power supply, thereby achieving flexible control of the output voltage and improving the energy efficiency of the chip.

According to an embodiment of the present disclosure, when the interrupt task is not triggered or the interrupt task is completed, the mode selection unit is configured to generate a third voltage control signal based on the second operating voltage so that the output voltage of the power supply is equal to the second operating voltage.

According to an embodiment of the present disclosure, the voltage control signal also includes a third control signal, wherein the third control signal can be obtained through the second operating voltage sent by the minimum energy point tracking module.

According to an embodiment of the present disclosure, when the interrupt task is not triggered or the interrupt task is completed, the mode selection unit generates a third voltage control signal in response to receiving the second operating voltage from the minimum energy point tracking module, and uses the third voltage control signal to control the buck conversion unit to reduce the output voltage of the power supply so that the output voltage of the power supply is equal to the second operating voltage.

The embodiment of the present disclosure utilizes a third voltage control signal to control the step-down conversion unit to reduce the output voltage of the power supply, so that the power supply operates with a low-power operating voltage corresponding to the minimum energy point as the output voltage, so as to reduce the dynamic power consumption and static power consumption of the system, thereby achieving low-power operation when the system is waiting for an interrupt task.

According to an embodiment of the present disclosure, the power control system also includes a sleep standby module, which is configured to shut down the switching power domain power supply when it is detected that the power supply voltage of the power supply at the current moment does not meet the reference voltage threshold, charge the power supply using an energy collector, and restore the switching power domain power supply when it is detected that the power supply voltage of the power supply at the current moment meets the reference voltage threshold.

According to an embodiment of the present disclosure, the sleep standby module may include a multi-power division unit, a power switch, an isolation unit, a holding unit, a voltage conversion unit, and the like.

FIG2 schematically shows a structural block diagram of a power supply control system according to a specific embodiment of the present disclosure.

As shown in FIG. 2 , the power control system includes a power sensing module 110 , a performance sensing module 120 , a minimum energy point tracking module 130 , a mode control module 140 , and a sleep standby module 210 .

According to an embodiment of the present disclosure, when the mode control module 140 monitors that the power supply voltage of the power supply at the current moment is less than or equal to the minimum reference voltage threshold, it means that the remaining power of the system at the current moment is insufficient, so the power control system can start the sleep standby module 210.

According to an embodiment of the present disclosure, when the system starts the sleep standby module 210, the sleep standby module 210 controls to shut down the switch power domain power supply, retains the normally open domain circuit to process the interrupt signal generated by the input/output interface, and starts the energy collector to charge the power supply.

According to an embodiment of the present disclosure, when the mode control module 140 monitors that the power supply voltage of the power supply at the current moment is greater than the minimum reference voltage threshold, the sleep standby module 210 restores the power supply of the switching power domain, and the power control system switches to the minimum energy point tracking mode while waiting for the interrupt task, and switches to the performance awareness mode when the interrupt task is triggered.

In the embodiment of the present disclosure, when it is monitored that the remaining power of the system is insufficient, a sleep standby module is used to shut down the switching power domain power except the normally-on power supply, and the power control system is charged, thereby ensuring that the dynamic power consumption of the system is minimized when the power is insufficient, thereby extending the service life of the power supply while reducing power consumption.

Referring to FIG. 3, the power supply control system is further described in combination with a specific embodiment.

FIG3 schematically shows a schematic diagram of a power supply control system according to a specific embodiment of the present disclosure.

As shown in FIG. 3 , in a specific embodiment, the power control system includes a power sensing module 110 , a performance sensing module 120 , a minimum energy point tracking module 130 , a mode control module 140 , and a sleep standby module 210 .

According to an embodiment of the present disclosure, the power sensing module 110 may include a crystal oscillator and an analog-to-digital converter, wherein the crystal oscillator may be a current-limited oscillator, and the frequency of the oscillator may be controlled by reducing the current or limiting the power supply of the oscillator circuit. In addition, the crystal oscillator may also provide a clock signal for the analog-to-digital converter, and the clock signal may include a microprocessor clock, a register clock, an analog-to-digital converter clock, a buck converter clock, etc.

According to the embodiments of the present disclosure, the analog-to-digital converter may be a successive approximation register Analog-to-Digital Converter (SAR ADC). The input signal of the SAR ADC includes a maximum reference voltage V _H and a minimum reference voltage V _L , and also includes a power supply voltage V _IN of the power supply at the current moment. The SAR ADC may sample the input signal at a preset time interval, and compare the power supply voltage V _IN of the power supply at the current moment with the standard values of the maximum reference voltage V _H and the minimum reference voltage V _L , so that the input signal converges successively until the two signals are equal, and finally outputs 4-bit power supply voltage data after quantizing the power supply voltage V _IN of the power supply at the current moment, and sends the power supply voltage data to the mode conversion module 140 via signal 1.

According to an embodiment of the present disclosure, the performance perception module 120 may include a memory SRAM, a bus AXI, a data transmission interface, multiple input/output interfaces and a timer, wherein the multiple input/output interfaces may include a general-purpose interface (General-purpose input/output, GPIO), a peripheral interface (Serial Peripheral Interface, SPI), etc.

According to an embodiment of the present disclosure, multiple input/output interfaces can be configured with different priority attributes for receiving interrupt tasks of different priorities. When a target input/output interface receives an interrupt task, the priority corresponding to the interrupt task is determined through a data transmission interface based on the priority attribute of the target input/output interface, and based on the priority of the interrupt task, a first operating voltage corresponding to the interrupt task is determined, and the first operating voltage is sent to the mode control module 140 through signal 3.

According to an embodiment of the present disclosure, the minimum energy point tracking module 130 may include at least one counter and a minimum energy point tracking unit, wherein two counters may be used to count the digital clock cycles of two adjacent voltage values respectively. For example, when the interrupt task is not triggered or the interrupt task is completed, the power supply voltage V _IN of the power supply at the current moment may be used as the initial voltage, and the output voltage is waited to be stable. The two counters are reset, and the first counter is used to obtain the first digital clock cycle of the initial voltage. The power supply voltage V _IN of the power supply at the current moment is adjusted downward by a gradient with a preset voltage threshold, and the second counter is used to obtain the second digital clock cycle of the adjusted new power supply voltage V _IN ' of the power supply at the current moment.

According to an embodiment of the present disclosure, the minimum energy point tracking unit compares the counting results of the two counters. If the first digital clock cycle is less than the second digital clock cycle, it means that the circuit energy consumption time is long and the energy consumption is slow under V _IN '. Therefore, V _IN ' can be used as the initial voltage and the voltage can be continuously reduced. On the contrary, if the first digital clock cycle is greater than or equal to the second digital clock cycle, it means that the circuit consumption time is short under V _IN ', which means that the energy consumption is fast. Therefore, if the voltage continues to decrease, the power consumption will increase. Therefore, V _IN is determined as the minimum power consumption voltage corresponding to the minimum energy point, that is, V _IN is determined as the second operating voltage, which is sent to the mode control module 140 through the signal S2.

According to an embodiment of the present disclosure, the initial voltage may be adjusted for multiple rounds in the above process until the counting result satisfies the condition that the first digital clock period is greater than or equal to the second digital clock period.

According to an embodiment of the present disclosure, the mode control module 140 may include a mode control unit and a buck converter, wherein the mode control unit may monitor the current system remaining power information, the interrupt task information accessed by multiple input/output interfaces, and the minimum power consumption voltage information based on signals S1, S2, and S3, and generate different voltage control signals to be sent to the buck converter. The mode control unit may also switch the current operating mode of the power control system based on signals S1, S2, and S3.

According to an embodiment of the present disclosure, a buck converter can achieve voltage conversion based on a voltage control signal by utilizing multiple field effect transistors, pulse switches, inductors and other components, wherein the pulse switch of the buck converter can be controlled according to an enable signal obtained by comparing the output voltage V _OUT of the power supply with a reference voltage.

According to an embodiment of the present disclosure, when the mode control unit detects that the current remaining power of the system is lower than the minimum power, that is, the power supply voltage V _IN of the power supply at the current moment is less than or equal to the minimum reference voltage V _L , the system switches to the sleep standby mode and starts the sleep standby module 210.

According to an embodiment of the present disclosure, the sleep standby module 210 turns off part of the power domain power, retains the normally-on power domain power, and starts the energy collector to charge the power, waiting for the current supply voltage to be between the maximum reference voltage V _H and the minimum reference voltage V _L .

According to an embodiment of the present disclosure, when the mode control module 140 detects that the power supply voltage of the power supply at the current moment is greater than the minimum reference voltage V _L , the sleep standby module 210 restores the power supply of the switching power domain.

According to an embodiment of the present disclosure, when the power is sufficient and waiting for an interrupt task, the mode control unit switches the current mode of the power control system to the minimum energy point tracking mode, and when the interrupt task is triggered, the power control system switches to the performance awareness mode.

According to an embodiment of the present disclosure, the power control system may also include a core microprocessor (Microcontroller Unit, MCU), an embedded memory module such as a read-only memory (Read-Only Memory, ROM), a digital signal processor (Digital Signal Processing, DSP) module, external devices, a clock and reset generation block, a power switch, a voltage monitor, etc.

FIG. 4 schematically shows a flow chart of a power control method according to an embodiment of the present disclosure.

As shown in FIG. 4 , the method includes operations S410 to S450 .

In operation S410, power supply voltage data of a power source at a current moment is collected.

According to an embodiment of the present disclosure, after the chip is started, the power control system is in the power sensing mode by default. In the power sensing mode, the power supply voltage data of the power supply at the current moment is collected to monitor the power supply voltage of the power supply at the current moment, the quantified remaining power of the power supply at the current moment, etc.

In operation S420 , in response to the interrupt task being triggered, a first operating voltage is determined based on a priority of the interrupt task.

According to an embodiment of the present disclosure, when the target input/output interface receives an interrupt task, the priority of the interrupt task is determined based on the priority attribute of the target input/output interface; based on the priority of the interrupt task, the first operating voltage corresponding to the interrupt task is determined.

In operation S430 , in a case where the interrupt task is not triggered or the interrupt task is completed, a second operating voltage is determined based on the supply voltage data.

According to an embodiment of the present disclosure, when the interrupt task is not triggered or the interrupt task is completed, based on the power supply voltage data, a first digital clock cycle corresponding to the power supply voltage of the power supply at the current moment is obtained; based on a preset voltage threshold, the power supply voltage of the power supply at the current moment is adjusted to obtain a new power supply voltage of the power supply at the current moment, and a second digital clock cycle corresponding to the new power supply voltage of the power supply at the current moment is obtained.

According to an embodiment of the present disclosure, a first digital clock cycle and a second digital clock cycle are compared to obtain a comparison result. If the comparison result indicates that the first digital clock cycle is less than the second digital clock cycle, the power supply voltage of the power supply at the current moment is updated to a new power supply voltage of the power supply at the current moment, and based on a preset voltage threshold, the new power supply voltage of the power supply at the current moment is adjusted again. If the comparison result indicates that the first digital clock cycle is greater than or equal to the second digital clock cycle, the power supply voltage of the power supply at the current moment is determined as the second operating voltage.

Specifically, if the first digital clock cycle is less than the second digital clock cycle, it means that the circuit consumes energy for a long time and consumes energy slowly under the power supply voltage of the power supply at the new current moment, so the power supply voltage of the power supply at the new current moment can be used as the initial voltage and the voltage can be continuously adjusted downward. On the contrary, if the first digital clock cycle is greater than or equal to the second digital clock cycle, it means that the circuit consumes energy for a short time under the power supply voltage of the power supply at the new current moment, which means that the energy consumption is fast, so if the voltage continues to decrease, the power consumption will increase, so the initial voltage is determined as the minimum power consumption voltage corresponding to the minimum energy point, that is, determined as the second working voltage.

According to an embodiment of the present disclosure, the initial voltage may be adjusted for multiple rounds in the above process until the counting result satisfies the condition that the first digital clock period is greater than or equal to the second digital clock period.

In operation S440, a voltage control signal is generated based on the power supply voltage data, the first operating voltage, or the second operating voltage, and an output voltage of the power supply is controlled using the voltage control signal.

According to an embodiment of the present disclosure, the voltage control signal includes a first voltage control signal, a second voltage control signal, and a third voltage control signal, and the voltage control signal is used to control the output voltage of the power supply.

According to an embodiment of the present disclosure, after the power control system is started, the system is in a power sensing mode by default, and the power supply voltage data of the power supply at the current moment is collected in the power sensing mode.

According to an embodiment of the present disclosure, in response to an interrupt task being triggered, the power control system turns on the performance awareness mode and continues to run the power awareness mode to simultaneously monitor the remaining power of the system at the current moment and the first operating voltage corresponding to the priority of the input/output interface processing the interrupt task.

According to an embodiment of the present disclosure, when the first operating voltage is greater than or equal to the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, a first voltage control signal is generated, wherein the first voltage control signal is used to maintain the output voltage of the power supply so that the output voltage of the power supply is equal to the power supply voltage of the power supply at the current moment; when the first operating voltage is less than the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, a second voltage control signal is generated, wherein the second voltage control signal is used to downwardly regulate the output voltage of the power supply.

According to an embodiment of the present disclosure, when the interrupt task is not triggered or the interrupt task is completed, the power control system starts the minimum energy point tracking mode and continues to run the power sensing mode to simultaneously monitor the remaining power of the system at the current moment and the second operating voltage corresponding to the minimum dynamic energy point, and based on the second operating voltage, generates a third voltage control signal so that the output voltage of the power supply is equal to the second operating voltage.

According to an embodiment of the present disclosure, when the power control system monitors that the power supply voltage of the power supply at the current moment is less than or equal to the minimum reference voltage threshold, it indicates that the remaining power of the system at the current moment is insufficient, and the power control system switches to the sleep standby mode. In the sleep standby mode, the switch power domain power supply is turned off, and the normally open domain circuit is retained to process the interrupt signal generated by the input/output interface, and the energy collector is started to charge the power supply. When the power control system monitors that the power supply voltage of the power supply at the current moment is greater than the minimum reference voltage threshold, the switch power domain power supply is restored, and the power control system switches to the minimum energy point tracking mode again while waiting for the interrupt task. When the interrupt task is triggered, the power control system switches to the performance perception mode.

The embodiments of the present disclosure continuously monitor the changing trend of the power supply voltage of the power supply at the current moment through the power sensing mode. When there is an interrupt task, the required energy consumption and the first working voltage are determined according to the interrupt task priority through the performance sensing mode, so that the power control system adjusts the power output voltage according to the priority control of different interrupt tasks when processing the interrupt task, thereby reducing dynamic power consumption; in addition, when the interrupt task is not triggered or the interrupt task is completed, the minimum energy point is determined through the minimum energy tracking mode, and the working voltage corresponding to the minimum energy point is determined as the second working voltage, so that the power control system runs at the minimum working voltage when waiting for the interrupt task, thereby reducing static power consumption, thereby extending the battery life and the service life of the chip.

5, the power control method is further described in combination with a specific embodiment.

FIG5 schematically shows a voltage variation diagram of a power supply control method according to a specific embodiment of the present disclosure.

As shown in Figure 5, the voltage change diagram of the power control method includes a trigger diagram of the interrupt task and a diagram of input voltage change, power output voltage change, and power consumption change. After the chip is started, the power control system is in power sensing mode by default. Since there are a large number of register configurations in the chip, in the power sensing mode, the power control system uses the power supply voltage collected at the current moment as the power output voltage.

At time _T1 after the power output voltage is stable, in response to the triggering of the first interrupt task, during the period from _T1 to _T2 , the power sensing mode continuously monitors the power supply voltage and the remaining power of the power supply at the current moment, and the power control system turns on the performance sensing mode. The first interrupt task is determined to be a high-priority interrupt task through the performance sensing mode, and a higher voltage is required for processing. Therefore, based on the power supply voltage of the power supply at the current moment fed back by the power sensing mode, the power output voltage is maintained at the power supply voltage of the power supply at the current moment to process the high-priority interrupt task.

At time _T2 after the first interrupt task is processed, in response to the second interrupt task being triggered, the power sensing mode and the performance sensing mode continue to work together during the period from _T2 to _T3 . The second interrupt task is determined to be a low-priority interrupt task through the performance sensing mode, and a lower voltage is required to process it. Therefore, based on the power supply voltage of the power supply at the current moment fed back by the power sensing mode, the power supply output voltage is adjusted downward to a lower voltage to process the low-priority interrupt task.

At time _T3 when the first interrupt task is completed and the next interrupt task is waiting, the power control system switches the performance perception mode to the minimum energy point output mode while the power perception mode continues to monitor the power supply voltage and remaining power of the power supply at the current moment. During the period from _T3 to _T4 , the minimum power consumption voltage is determined based on the power supply voltage of the power supply at the current moment through the minimum energy point output mode, and the minimum power consumption voltage is determined as the power output voltage, so that the power control system continues to operate at the minimum power consumption voltage while waiting for the interrupt task.

At time _T4 of the minimum energy point output mode, in response to the third interrupt task being triggered, the power control system switches the minimum energy point output mode to the performance perception mode again while the power perception mode continues to monitor the power supply voltage and the remaining power of the power supply at the current moment. During the period from _T4 to _T5 , the third interrupt task is determined to be a high priority interrupt task through the performance perception mode, which requires higher voltage processing. Therefore, based on the power supply voltage of the power supply at the current moment fed back by the power perception mode, the power supply output voltage is adjusted upward to the power supply voltage of the power supply at the current moment to process the high priority interrupt task. Among them, the power supply voltage of the power supply at the current moment decreases as the remaining power decreases.

At time _T5 when the third interrupt task is completed and the next interrupt task is waiting, the power control system switches the performance perception mode to the minimum energy point output mode again when the power perception mode continues to monitor the power supply voltage and the remaining power of the power supply at the current moment. During the period from _T5 to _T6 , the minimum energy point output mode is used to determine the minimum power consumption voltage under the power supply voltage of the power supply at the current moment, and the minimum power consumption voltage is determined as the power output voltage, so that the power control system continues to operate at the minimum power consumption voltage while waiting for the interrupt task.

At time _T6 when the power sensing mode monitors that the power supply voltage at the current moment does not meet the reference voltage threshold, the power control system switches the minimum energy point output mode to the sleep standby mode based on the power sensing mode monitoring that the current remaining power is insufficient. During the period from _T6 to _T7 , through the sleep standby mode, the data of each module can be stored and processed first, the switch power domain clock can be gated, the output interface of the switch power domain can be isolated and set to 1 or 0; then the storage register data can be enabled, part of the switch power domain power supply is turned off, the normally open switch power domain power supply is retained, and the power supply is charged using the energy collector. Among them, the more modules the switch power domain contains, the more obvious the power consumption saving is.

When the power sensing mode monitors that the power supply voltage at the current moment is greater than the minimum reference voltage threshold at time _T7 , the power of the switching power domain is restored, the register data is restored, the isolation is disabled, the clock is restored, and the system resumes normal operation. The mode control module switches the mode according to the power supply voltage data and interrupt task sent by the power sensing module.

Specifically, if the system is waiting for an interrupt task, the power control system switches the sleep standby mode to the minimum energy point tracking mode; if the interrupt task is triggered, the power control system switches the sleep standby mode to the performance-aware mode. The performance-aware mode and the minimum energy point tracking mode can be switched cyclically based on whether the interrupt task is triggered.

It will be appreciated by those skilled in the art that the features described in the various embodiments and/or claims of the present disclosure may be combined and/or combined in a variety of ways, even if such combinations and/or combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments and/or claims of the present disclosure may be combined and/or combined in a variety of ways without departing from the spirit and teachings of the present disclosure. All of these combinations and/or combinations fall within the scope of the present disclosure.

The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims (10)

1. A power control system, comprising:

an electric quantity sensing module, a performance sensing module, a minimum energy point tracking module and a mode control module,

The electric quantity sensing module is configured to collect power supply voltage data of a power supply at the current moment and send the power supply voltage data to the minimum energy point tracking module and the mode control module respectively;

The performance sensing module is configured to respond to the triggering of an interrupt task, determine a first working voltage based on the priority of the interrupt task, and send the first working voltage to the mode control module;

The minimum energy point tracking module is configured to determine a second working voltage based on the power supply voltage data and send the second working voltage to the mode control module when the interrupt task is not triggered or the interrupt task is completed;

The mode control module is configured to generate a voltage control signal based on the supply voltage data, the first operating voltage, or the second operating voltage, and control an output voltage of the power supply using the voltage control signal.

2. The power control system of claim 1, wherein the minimum energy point tracking module comprises a counting unit, a minimum energy point tracking unit,

The timing unit is configured to acquire a first digital clock period corresponding to the power supply voltage of the power supply at the current moment based on the power supply voltage data under the condition that the interrupt task is not triggered or the interrupt task is completed, adjust the power supply voltage of the power supply at the current moment based on a preset voltage threshold value to acquire a new power supply voltage of the power supply at the current moment, and acquire a second digital clock period corresponding to the new power supply voltage of the power supply at the current moment;

The minimum energy point tracking unit is configured to compare the first digital clock period and the second digital clock period output by the timing unit, to obtain a comparison result,

If the comparison result indicates that the first digital clock period is smaller than the second digital clock period, updating the power supply voltage of the power supply at the current moment to the new power supply voltage of the power supply at the current moment, and adjusting the power supply voltage of the power supply at the new current moment again based on the preset voltage threshold;

And if the comparison result indicates that the first digital clock period is greater than or equal to the second digital clock period, determining the power supply voltage of the power supply at the current moment as the second working voltage, and sending the second working voltage to the mode control module.

3. The power control system of claim 1, wherein the performance awareness module comprises a plurality of input/output interfaces configured to receive the interrupt task;

Wherein the performance awareness module is configured to determine, based on a priority attribute of a target input/output interface, a priority of the interrupt task, determine, based on the priority of the interrupt task, a first operating voltage corresponding to the interrupt task, and send the first operating voltage to the mode control module, where the target input/output interface belongs to the plurality of input/output interfaces, if the target input/output interface receives the interrupt task.

4. The power control system of claim 1, wherein the voltage control signal comprises a first voltage control signal, a second voltage control signal;

in case the interrupt task is triggered, the mode selection unit is configured to:

Generating the first voltage control signal when the first working voltage is greater than or equal to the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, wherein the first voltage control signal is used for maintaining the output voltage of the power supply so that the output voltage of the power supply is equal to the power supply voltage of the power supply at the current moment;

And generating the second voltage control signal under the condition that the first working voltage is smaller than the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, wherein the second voltage control signal is used for downwards regulating the output voltage of the power supply.

5. The power control system of claim 1, wherein the voltage control signal further comprises a third control signal;

In case the interrupt task is not triggered or the interrupt task has been completed, the mode selection unit is configured to: and generating the third voltage control signal based on the second working voltage so that the output voltage of the power supply is equal to the second working voltage.

6. The power control system of claim 1, wherein the power control system further comprises a sleep standby module configured to turn off a switching power domain power supply, charge the power supply with an energy harvester, and resume the switching power domain power supply, upon detecting that the supply voltage of the power supply at the current time does not meet a reference voltage threshold.

7. A power supply control method, comprising:

collecting power supply voltage data of a power supply at the current moment;

responsive to an interrupt task being triggered, determining a first operating voltage based on a priority of the interrupt task;

Determining a second operating voltage based on the supply voltage data if the interrupt task is not triggered or the interrupt task has been completed;

and generating a voltage control signal based on the power supply voltage data, the first working voltage or the second working voltage, and controlling the output voltage of the power supply by using the voltage control signal.

8. The power control method according to claim 7, wherein the determining a second operating voltage based on the supply voltage data in a case where the interrupt task is not triggered or the interrupt task has been completed comprises:

acquiring a first digital clock period corresponding to the power supply voltage of the power supply at the current moment based on the power supply voltage data under the condition that the interrupt task is not triggered or the interrupt task is completed;

based on a preset voltage threshold, adjusting the power supply voltage of the power supply at the current moment to obtain the power supply voltage of the power supply at the new current moment, and obtaining a second digital clock period corresponding to the power supply voltage of the power supply at the new current moment;

comparing the first digital clock period with the second digital clock period to obtain a comparison result,

If the comparison result indicates that the first digital clock period is smaller than the second digital clock period, the power supply voltage of the power supply at the current moment is updated to the new power supply voltage of the power supply at the current moment, the power supply voltage of the power supply at the new current moment is adjusted again based on the preset voltage threshold value,

And if the comparison result indicates that the first digital clock period is greater than or equal to the second digital clock period, determining the power supply voltage of the power supply at the current moment as the second working voltage.

9. The power control method of claim 7, wherein said determining a first operating voltage based on a priority of an interrupt task and said supply voltage data in response to the interrupt task being triggered comprises:

determining the priority of the interrupt task based on the priority attribute of the target input/output interface under the condition that the target input/output interface receives the interrupt task;

and determining a first working voltage corresponding to the interrupt task based on the priority of the interrupt task and the power supply voltage data.

10. The power supply control method according to claim 7, wherein the generating a voltage control signal based on the supply voltage data, the first operation voltage, or the second operation voltage, and controlling the output voltage of the power supply using the voltage control signal comprises:

The voltage control signals comprise a first voltage control signal, a second voltage control signal and a third voltage control signal;

in the event that the interrupt task is triggered,

Generating the first voltage control signal when the first working voltage is greater than or equal to the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, wherein the first voltage control signal is used for maintaining the output voltage of the power supply so that the output voltage of the power supply is equal to the power supply voltage of the power supply at the current moment;

Generating the second voltage control signal under the condition that the first working voltage is smaller than the power supply voltage of the power supply at the current moment corresponding to the power supply voltage data, wherein the second voltage control signal is used for downwards regulating the output voltage of the power supply;

Generating the third voltage control signal based on the second operating voltage such that the output voltage of the power supply is equal to the second operating voltage, if the interrupt task is not triggered or the interrupt task has been completed;

and controlling the output voltage of the power supply by using the voltage control signal.