Power management method and device, terminal and computer readable storage medium

Abstract

The embodiment of the invention discloses a power management method and device, a terminal and a computer readable storage medium. The cruising ability of the terminal can be improved. The method comprises the following steps: determining a target output voltage according to at least one load voltage corresponding to at least one electricity load; determining a target load current range corresponding to the target output voltage based on a preset corresponding relation between the output voltage and the load current range; adjusting the highest output efficiency of the power supply circuit to a target load current range by adjusting the circuit configuration of the power supply circuit; the power supply circuit is used for supplying power to at least one electric load.

Description

Technical Field

[0001] The present application relates to the field of chips, and in particular to a power management method, device, terminal and computer-readable storage medium. Background Art

[0002] At present, the Dynamic Voltage and Frequency Scaling (DVFS) technology is a technology in which the controller adjusts the voltage and frequency according to the scheduling set by the system working scenario and the user scenario. The DVFS controller and its corresponding voting mechanism are open-loop controlled with the power rail, which works independently of the controller. In addition, the efficiency curve of the power rail is also fixed, resulting in low efficiency of the power rail during the system load power consumption process, thereby increasing the power consumption of the terminal and reducing the endurance of the terminal. Summary of the invention

[0003] The embodiments of the present application are intended to provide a power management method, device, terminal and computer-readable storage medium that can improve power efficiency and thus improve terminal endurance.

[0004] The technical solution of this application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a power management method, including:

[0006] determining a target output voltage according to at least one load voltage corresponding to at least one electrical load;

[0007] Determining a target load current range corresponding to the target output voltage based on a preset correspondence relationship between the output voltage and the load current range;

[0008] By adjusting the circuit configuration of the power supply circuit, the maximum output efficiency of the power supply circuit is adjusted to the target load current range; the power supply circuit is used to supply power to the at least one electrical load.

[0009] In a second aspect, an embodiment of the present application provides a power management device, including:

[0010] A determination module, configured to determine a target output voltage according to at least one load voltage corresponding to at least one electrical load; and determine a target load current range corresponding to the target output voltage based on a preset correspondence between the output voltage and the load current range;

[0011] The adjustment module is used to adjust the maximum output efficiency of the power supply circuit to the target load current range by adjusting the circuit configuration of the power supply circuit; the power supply circuit is used to supply power to the at least one electrical load.

[0012] In a third aspect, an embodiment of the present application provides a chip, including:

[0013] A memory for storing executable instructions;

[0014] The processor is used to implement the power management method provided in the embodiment of the present application when executing the executable instructions stored in the memory.

[0015] In a fourth aspect, an embodiment of the present application provides a terminal, including:

[0016] A memory for storing executable instructions;

[0017] The processor is used to implement the power management method provided in the embodiment of the present application when executing the executable instructions stored in the memory.

[0018] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium storing executable instructions for causing a processor to execute and implement the power management method provided in the embodiment of the present application.

[0019] In a sixth aspect, an embodiment of the present application provides a computer program product, including a computer program or instructions, which, when executed by a processor, implements the power management method provided in the embodiment of the present application.

[0020] The embodiments of the present application provide a power management method, device, terminal and computer-readable storage medium, which determine the target output voltage according to at least one load voltage corresponding to at least one power load, and determine the target load current range based on the correspondence between the preset output voltage and the load current range. Since the output efficiency of the power supply circuit is related to the load current, the voltage adjustment value of the DVFS can be linked to the efficiency curve of the power supply circuit. By adjusting the circuit configuration of the power supply circuit, the highest output efficiency, that is, the highest efficiency point of the efficiency curve, is adjusted to the target load current range, thereby improving the power supply efficiency within the target load current range, reducing the power supply circuit loss, and thus improving the endurance of the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the relationship between the efficiency and load circuit of a current BUCK circuit;

[0022] Figure 2 A schematic diagram of a curve showing the relationship between the efficiency and the load current near the phase switching point of a multi-phase BUCK circuit;

[0023] Figure 3 A schematic diagram of an optional process of the power management method provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of adjusting the highest efficiency point in a curve of relationship between efficiency and load current provided in an embodiment of the present application;

[0025] Figure 5 An optional flowchart of a power management method provided in an embodiment of the present application;

[0026] Figure 6 A schematic diagram of a curve showing the relationship between the number of switches and the loss in a power supply circuit provided in an embodiment of the present application;

[0027] Figure 7 A schematic diagram of an optional process of the power management method provided in an embodiment of the present application;

[0028] Figure 8 An optional process diagram of a power management method is provided for an embodiment of the present application;

[0029] Fig. 9 A schematic diagram of an optional process of the power management method provided in an embodiment of the present application;

[0030] Fig.10 A schematic diagram of a curve showing the relationship between the output efficiency, input voltage and output voltage of the power supply circuit provided in an embodiment of the present application;

[0031] Fig.11 An optional flowchart of a power management method provided in an embodiment of the present application;

[0032] Fig.12 An optional flowchart of a power management method provided in an embodiment of the present application;

[0033] Fig.13 A schematic diagram of a PVT monitoring process provided in an embodiment of the present application;

[0034] Fig.14 A schematic diagram of an optional process of applying the power management method provided in an embodiment of the present application to an actual scenario;

[0035] Fig.15 An optional structural diagram of a power management device provided in an embodiment of the present application;

[0036] Fig.16 An optional structural diagram of a chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0038] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0039] In the following description, the terms "first\second\third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0041] At present, a power conversion circuit such as a single-phase BUCK circuit or a multi-phase BUCK circuit is usually used as a power rail to convert the voltage of the power supply and provide it to the load. The highest efficiency point of the single-phase BUCK circuit and the multi-phase BUCK circuit is fixed. For example, Figure 1 As shown in the figure, when the input voltage is 3.3V, the highest efficiency points on the efficiency curves corresponding to the output voltages of 1.0V, 1.8V and 2.5V of the three-phase (3phase, 3PH) BUCK circuit are all in the middle load section corresponding to the output current (i.e., load current). In other words, once the input-output relationship of the power supply circuit and the external devices such as the connected load are determined, the efficiency curve is fixed, and the power supply circuit cannot be maximized, thereby reducing the power supply efficiency and terminal endurance time.

[0042] Furthermore, the peak currents required by the chip core power supply, modem power supply, central processing unit (CPU) power supply and graphics processing unit (GPU) power supply on the terminal are relatively large, and multi-phase BUCK is often used for power supply. The current of each item of the currently commonly used multi-phase BUCK circuit is more than 5A, and the 4-phase BUCK circuit can provide a current of up to 20A. However, it is difficult to take into account the highest efficiency point at each load point within the load range of 20A. Currently, the highest efficiency point can only be achieved at the most commonly used load point, and the multi-phase BUCK circuit switches the phase according to the load size, such as Figure 2 As shown in the figure, since the efficiency will be significantly reduced near the switching point, it is difficult to take into account the efficiency optimization of the full load range even if the phase switching is done. Even under the condition of high current load, the power efficiency will drop to about 70%, which will cause great heat generation and shorten the battery life, thus reducing the power efficiency and terminal battery life.

[0043] The embodiments of the present application provide a power management method, device, terminal and computer-readable storage medium, which can improve power efficiency and terminal battery life. Figure 3 , Figure 3 An optional flow chart of a power management method provided in an embodiment of the present application is as follows:

[0044] S101. Determine a target output voltage according to at least one load voltage corresponding to at least one electrical load.

[0045] In an embodiment of the present application, one or more power loads among at least one power load submit a voltage regulation application based on the business they run, and the voltage regulation application includes the load voltage required by the power load; the terminal determines, based on at least one load voltage corresponding to the at least one power load, a load voltage that can meet the voltage requirements of all power loads as the target output voltage.

[0046] In some embodiments, the electrical load may submit a voltage regulation application to the voting manager, which records at least one load voltage corresponding to at least one electrical load. The voting manager updates at least one load voltage according to the load voltage in the received voltage regulation application, and determines the highest voltage value of the at least one load voltage as the target output voltage.

[0047] In some embodiments, at least one power load may be at least one subsystem on a system-on-chip (System On Chip, SOC). Here, the subsystem may be a digital circuit module. At least one power load may be mounted in the same power domain, and a power management chip (Power Management IC, PMIC) may use the power supply voltage and target output voltage of the power domain to power at least one power load. The PMIC includes a power supply circuit of an embodiment of the present application. The power supply circuit in the PMIC is connected to at least one power load in the SOC.

[0048] S102: Determine a target load current range corresponding to the target output voltage based on a preset correspondence relationship between the output voltage and the load current range.

[0049] In the embodiment of the present application, the corresponding relationship between the preset output voltage and the load current range is recorded in the terminal. The corresponding relationship between the preset output voltage and the load current range can be obtained by performing simulation tests in various scenarios.

[0050] In some embodiments, the correspondence between the preset output voltage and the load current range includes a preset correspondence between at least one output voltage and at least one operating frequency, and a preset correspondence between at least one operating frequency and at least one load current range. Exemplarily, the power supply circuit for supplying power to at least one power load such as a CPU, a GPU, and a modem can reduce power consumption through the DVFS process, that is, according to the call of different processes in different working scenarios or different business operation needs, the output voltage is adjusted in real time to provide to at least one power load, and at least one power load adjusts the working voltage and working frequency accordingly according to the output voltage provided by the power supply circuit. For power loads such as Modem, CPU, and GPU at different working voltages and working frequencies, the higher the working voltage and the higher the working frequency, the greater the required current, that is, the greater the load current. Conversely, the lower the working voltage and the lower the working frequency, the smaller the load current. Exemplarily, when the terminal enters a sleep state, the output voltage of the power supply circuit will be reduced to the minimum, at which time the load current is in the range of several mA to more than ten mA. When the calling process of the power load increases, the power load needs to increase the working frequency and working voltage to meet the needs of the calling process, the output voltage of the power supply circuit increases, and the load current will also increase accordingly. In this way, through a large number of simulation tests or accumulation of empirical values, at least one one-to-one correspondence between output voltage, operating frequency and load current range can be obtained, that is, the correspondence between the preset output voltage and load current range. As shown in Table 1, as follows:

[0051] Table 1

[0052] Output voltage Operating frequency Load current range 0.55V 200M 10mA~100mA 0.65V 500M 100mA~500mA 0.7V 800M 500mA~1A 0.75V 1G 1A~2A 0.8V 1.2G >2A

[0053] It can be seen that for each output voltage, the operating frequency corresponding to the output voltage and the load current range at the operating frequency are determined. The embodiment of the present application searches in the correspondence between the preset output voltage and the load current range according to the target output voltage, determines the target operating frequency in the preset correspondence between at least one output voltage and at least one operating frequency according to the target output voltage, and then determines the target load current range in the preset correspondence between at least one operating frequency and at least one load current range according to the target operating frequency, thereby determining the target load current range corresponding to the target output voltage. In this way, the corresponding target load current range can be determined according to different voltages and frequencies, and the output efficiency of the power supply circuit within the target load current range can be maximized.

[0054] It should be noted that for different terminals, the correspondence between the preset output voltage and the load current range is different. Even for the same terminal, the correspondence between the preset output voltage and the load current range may be different in different application scenarios. In some embodiments, when the application scenario is determined, the correspondence between the preset output voltage and the load current range can be written and stored in the terminal during the production process. In the case of uncertain application scenarios, the correspondence between the preset output voltage and the load current range is different and can be written and stored in the terminal through software upgrades and other methods. The specific selection is based on the actual situation, and the embodiments of the present application are not limited.

[0055] S103 , adjusting the maximum output efficiency of the power supply circuit to a target load current range by adjusting the circuit configuration of the power supply circuit.

[0056] In the embodiment of the present application, the power supply circuit is used to supply power to at least one electrical load. In some embodiments, the power supply circuit may include a direct current / direct current (DC / DC) conversion circuit such as a single-phase BUCK circuit and a multi-phase BUCK circuit, and the specific selection is based on actual conditions, and the embodiment of the present application is not limited.

[0057] In the embodiment of the present application, the circuit configuration of the power supply circuit, such as the number of switches, the switching frequency, the switching mode, and the input-output voltage difference of the power supply circuit, etc., will affect the output efficiency of the power supply circuit. Figure 1 It can be seen that there is a corresponding relationship curve between the output efficiency of the power supply circuit and the load current. Therefore, by adjusting the circuit configuration of the power supply circuit, the maximum output efficiency of the power supply circuit can be adjusted to within the target load current range. Figure 4As shown, by adjusting the circuit configuration of the power supply circuit, the highest output frequency at the original point A is adjusted to point B within the target load current range. In this way, the power supply circuit can supply power to at least one electrical load with the highest output efficiency.

[0058] It should be noted that the current control mode between DVFS and the power supply circuit is open-loop control. The power supply circuit works independently of DVFS. In the embodiment of the present application, since the target load current range is determined based on the target output voltage, and the target output voltage is determined by voting based on at least one load voltage corresponding to at least one electrical load. In other words, the embodiment of the present application can link the target output voltage determined by DVFS with the efficiency curve of the power supply circuit, use DVFS to determine the voltage value that currently needs to be adjusted, and adjust the highest efficiency point of the power supply circuit to the load current range corresponding to the voltage value, so as to maximize the utilization of the power supply circuit capacity and realize the control of the power supply efficiency at the optimal point by using the target output voltage determined by DVFS.

[0059] For example, in the standalone networking mode (SA) of the new radio (NR) of the fifth generation mobile communication technology (5G), the operating frequency of the physical layer control channel (L1C) is positively correlated with the voltage Vmodem of the modem. For example, when the subcarrier spacing is 15KHz, the operating frequency in the PDCCHonly mode is 500MHz, and a voltage of 0.55V is required. The operating frequency in the 3CC Throughput mode is 1G, and a voltage of 0.7V is required, and the load current of the latter is much greater than that of the former. Through the embodiments of the present application, the corresponding load current range can be determined when the Vmodem voltage changes, and the highest efficiency point of the BUCK circuit can be adjusted to the corresponding load current range in real time by changing the configuration of the BUCK circuit that supplies the power, so that the BUCK circuit in different scenarios or modes can operate at a more efficient load current.

[0060] It is understandable that in the embodiment of the present application, the target output voltage is determined according to at least one load voltage corresponding to at least one electrical load, and the target load current range is determined based on the correspondence between the preset output voltage and the load current range. Since the output efficiency of the power supply circuit is related to the load current, the voltage adjustment value of the DVFS can be linked to the efficiency curve of the power supply circuit, and the highest output efficiency, that is, the highest efficiency point of the efficiency curve, is adjusted to the target load current range by adjusting the circuit configuration of the power supply circuit, thereby improving the power supply efficiency within the target load current range, reducing the power supply circuit loss, and thus improving the endurance of the terminal.

[0061] The following describes the process of adjusting the maximum output efficiency to the target load circuit range by adjusting the circuit configuration of the power supply circuit in S103 by taking the power supply circuit as a single-phase power conversion circuit and a multi-phase power conversion circuit as examples.

[0062] In some embodiments, the power supply circuit includes: a single-phase power conversion circuit, illustratively, the single-phase power conversion circuit may be a single-phase BUCK circuit. For the single-phase power conversion circuit, the circuit configuration may include: at least one of a switch configuration and a drive circuit configuration. The switch configuration may be a configuration for a power stage switch in the power supply circuit.

[0063] In some embodiments, the switch configuration includes: the number of switches. Figure 3 ,like Figure 5 As shown, S103 can be implemented by executing S201 or S202 as follows:

[0064] S201 . When the target load current range is lower than a first preset load current threshold, reduce the number of switches in the power supply circuit.

[0065] S202: When the target load current range is higher than or equal to a first preset load current threshold, increase the number of switches in the power supply circuit.

[0066] In the embodiments of the present application, the loss of the power supply circuit may be one of the factors affecting the efficiency of the power supply circuit. The total loss of the power supply circuit may include switching loss and conduction loss. In some embodiments, the power stage switch in the power supply circuit may be implemented using a field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET). The more switches there are, the smaller the on-resistance is, and thus the conduction loss is smaller, but the switching loss of the MOSFET is greater. Figure 6 In this way, when the target load current range is lower than the first preset load current threshold, that is, when the load current is small, the number of switches can be reduced; when the target load current range is higher than or equal to the first preset load current threshold, that is, when the load current is large, the number of switches can be increased, thereby adjusting the power supply circuit loss by adjusting the number of switches, and further adjusting the highest efficiency point of the power supply circuit to the target load current range.

[0067] In some embodiments, a sufficient number of switch tubes may be reserved when designing the power supply circuit. Thus, during the operation of the power supply circuit, the operable switch tubes may be configured in real time through registers, thereby adjusting the number of switches.

[0068] In some embodiments, the switch configuration includes: the operating frequency of the switch tube. Figure 3,like Figure 7 As shown, S103 can be implemented by executing S301 as follows:

[0069] S301. Adjust the maximum output efficiency to a target load current range by adjusting the operating frequency of the switch tube in the power supply circuit.

[0070] In the embodiment of the present application, the switching loss in the total loss of the power supply circuit is related to the operating frequency of the switch tube. Under the same MOSFET size conditions, the efficiency of the switch tube is inversely proportional to the operating frequency of the switch tube, so that the operating frequency of the switch tube is inversely proportional to the output efficiency of the power supply circuit. By adjusting the operating frequency of the switch tube in the power supply circuit, the efficiency of the switch tube in the power supply circuit can be adjusted, and then by changing the efficiency of the switch tube in the power supply circuit, the output efficiency of the power supply circuit is adjusted to the target load current range.

[0071] It should be noted that, considering the impact of noise factors such as ripple on the power stage switch, the operating frequency of the switch tube cannot be too low. Exemplarily, the operating frequency of the switch tube cannot be lower than a preset frequency threshold.

[0072] In some embodiments, the switch configuration includes: a switch mode. Figure 3 ,like Figure 8 As shown, S103 may be implemented by executing any one of S401-S403 as follows:

[0073] S401 . When the target load current range is higher than a second preset load current threshold, adjust the switching mode to a continuous conduction mode.

[0074] In the embodiment of the present application, when the target load current range is higher than the second preset load current threshold, it indicates that the current load of the power supply circuit is heavy. Since the continuous conduction mode (CCM) is more efficient in heavy load scenarios, the switching mode can be adjusted to CCM to improve the efficiency of the switch tube in heavy load scenarios, and then the highest point of the output efficiency of the power supply circuit is adjusted to the target load current range by adjusting the efficiency of the switch tube.

[0075] It should be noted that the first preset load current threshold and the second preset load current threshold act on different circuit configuration adjustment strategies and are set according to actual needs in actual application. The embodiment of the present application does not limit the size relationship between the first preset load current threshold and the second preset load current threshold.

[0076] S402: When the target load current range is higher than a third preset load current threshold and not higher than a second preset load current threshold, adjust the switch mode to a discontinuous conduction mode.

[0077] In an embodiment of the present application, the second preset load rate threshold is higher than the third preset load rate threshold. When the target load current range is higher than the third preset load current threshold and not higher than the second preset load current threshold, it indicates that the current power supply circuit is in a medium load state. Since the discontinuous conduction mode (DCM) is more efficient in medium load scenarios, the switching mode can be adjusted to DCM to improve the efficiency of the switch tube in medium load scenarios, and then the highest point of the output efficiency of the power supply circuit is adjusted to the target load current range by adjusting the efficiency of the switch tube.

[0078] S403: When the target load current range is not higher than a third preset load current threshold, adjust the switching mode to a pulse frequency modulation mode or a burst mode.

[0079] In the embodiment of the present application, when the target load current range is not higher than the third preset load current threshold, it indicates that the current power supply circuit is in a light load state. Since the pulse frequency modulation (PFM) mode and the burst mode are more efficient in a light load state, the switch mode can be adjusted to the PFM mode or the burst mode to improve the efficiency of the switch tube in a light load scenario, and then the highest point of the output efficiency of the power supply circuit is adjusted to the target load current range by adjusting the efficiency of the switch tube.

[0080] It can be understood that in the embodiments of the present application, by adjusting the switching mode of the switching tube in the power supply circuit under different load scenarios, the highest efficiency point of the power supply circuit is adjusted to the target load circuit range, that is, within the output load current range of the power supply circuit in the current scenario, so that the power supply circuit can operate at the highest efficiency in various load scenarios, thereby improving the working efficiency of the power supply circuit, reducing the loss of the power supply circuit, and thereby improving the battery life of the terminal.

[0081] In some embodiments, the power supply circuit includes a driving circuit, and the driving circuit is used to provide a driving level for the power supply circuit. Exemplarily, the driving circuit can provide a driving level for a switch tube in a BUCK circuit.

[0082] based on Figure 3 ,like Fig. 9 As shown, S103 can be implemented by executing S501 as follows:

[0083] S501, adjusting the driving level by adjusting at least one of the operating frequency of the driving circuit switch tube, the number of the driving circuit switch tube and the driving circuit switching mode, so as to adjust the maximum output efficiency to the target load current range.

[0084] In the embodiment of the present application, by adjusting at least one of the operating frequency of the switch tube of the driving circuit, the number of switch tubes of the driving circuit, and the switch mode of the driving circuit, the level value of the driving level output by the driving circuit can be adjusted. Since the change of the driving level affects the conduction or closing of the switch tube in the power supply circuit, it can be seen that the change of the driving level can also affect the output efficiency of the power supply circuit. Therefore, by adjusting the driving level of the driving circuit, the maximum output efficiency of the power supply circuit can be adjusted to the target load current range.

[0085] In the embodiment of the present application, the process of adjusting the operating frequency of the driving circuit switch tube, the number of driving circuit switch tubes and the driving circuit switching mode is consistent with the corresponding description of the process of adjusting the number of switch tubes, the operating frequency of the switch tube and the switching mode, and will not be repeated here.

[0086] In some embodiments, the voltage difference between the input voltage and the output voltage of the power supply circuit is also one of the factors affecting the efficiency of the power supply circuit. The input voltage of the power supply circuit may be the voltage of the power supply to which the power supply circuit is connected. For example, the input voltage may include the battery voltage on the terminal. The relationship curve between the output efficiency of the power supply circuit and the input voltage and the output voltage may be as follows: Fig.10 shown. Fig.10 In the figure, Vin represents the input voltage and Vout represents the output voltage. It can be seen that when the input voltage is the same as 3.8V, the greater the voltage difference between the input voltage and the output voltage, the lower the output efficiency of the power supply circuit. Therefore, the output efficiency of the power supply circuit is inversely proportional to the voltage difference between the input voltage and the output voltage.

[0087] In some embodiments, in the case where the output voltage of the power supply circuit changes, when adjusting the maximum output efficiency according to at least one of the above-mentioned number of switches, the operating frequency of the switch tube, the switching mode, and the drive circuit configuration, the influence of the input voltage change also needs to be considered. Exemplarily, the terminal is powered by a battery, and during the working process after a single charge, the battery voltage, that is, the input voltage of the power supply circuit, continues to decrease. In this way, when the output voltage is fixed to the target output voltage, the voltage difference between the input voltage and the output voltage also changes with the change of the input voltage. Therefore, when adjusting the circuit configuration, the terminal can adjust in combination with the input voltage, so as to fully consider the influence of the change of the battery voltage on the efficiency curve and improve the accuracy of the adjustment of the highest efficiency point.

[0088] In some embodiments, the power supply circuit includes: a multi-phase power conversion circuit. For example, the multi-phase power conversion circuit may be a multi-phase BUCK circuit. For the multi-phase power conversion circuit, S103 may be implemented by S601. Figure 3 ,like Fig.11 As shown below:

[0089] S601. Adjust the maximum output efficiency to a target load current range by adjusting at least one phase switching point of a multi-phase power conversion circuit to outside a target load current range.

[0090] In the embodiment of the present application, the phase adjustment of the multi-phase power conversion circuit is usually achieved by switching the phase threshold point, that is, switching at the phase switching point. Figure 2 It can be seen that the output efficiency near the phase switching point of the multi-phase power conversion circuit will decrease. If the phase switching point falls within the target load current range, it may cause the output efficiency of the power supply circuit to decrease according to the target load current range. Therefore, it is necessary to adjust at least one phase switching point of the multi-phase power conversion circuit to outside the target load current range to adjust the highest output efficiency to the target load current range.

[0091] In some embodiments, the phase switching points of the multi-phase power conversion circuit can be configured through registers, that is, by adjusting the configuration of the registers in the multi-phase power conversion circuit, at least one phase switching point can be adjusted, thereby adjusting the maximum output efficiency to the target load current range.

[0092] It can be understood that the embodiments of the present application comprehensively consider the influencing factors such as input voltage, switch configuration, drive circuit, phase switching point, etc. for various power supply circuits such as single-phase BUCK circuit and multi-phase BUCK circuit, and propose various efficiency curve optimization strategies, thereby realizing efficiency adjustment in various application scenarios and greatly improving the terminal's endurance.

[0093] In some embodiments, actual chips with power loads such as CPUs may have different process angle deviations during mass production. Figure 3 ,like Fig.12 As shown, S102 can be implemented through the process of S1021-S1024 as follows:

[0094] S1021. Determine an initial target operating frequency corresponding to the target output voltage according to a preset correspondence between at least one output voltage and at least one operating frequency.

[0095] In the embodiment of the present application, the terminal determines the operating frequency corresponding to the target output voltage as the initial target operating frequency in the preset correspondence between at least one output voltage and at least one operating frequency.

[0096] S1022. Determine target process condition data corresponding to the target power load based on the target output voltage.

[0097] In the embodiment of the present application, each of the at least one electrical load corresponds to at least one process condition data. The at least one process condition data corresponding to each electrical load can be pre-recorded in a database of the chip corresponding to the electrical load. The target electrical load is the electrical load corresponding to the target output voltage of the at least one electrical load, that is, the electrical load for which the voltage regulation application including the target output voltage is submitted.

[0098] In some embodiments, the process condition data may include PVT (Process, Voltage, Temperature) data. PVT data is a set of ternary data, and there is a one-to-one correspondence between Process, Voltage, and Temperature in a PVT data. At least one process condition data can represent the performance of the chip under at least one process condition scenario. Among them, P (Process) is the process angle, which represents the process deviation in the chip manufacturing process. The driving capabilities of NMOS transistors or PMOS transistors are different between different transistors / wafers / batches. Slow / Fast / Typical are used to represent the weak / strong / general driving capabilities of the transistors, respectively. By combining NMOS transistors or PMOS transistors, 5 types of process angles can be obtained, as follows:

[0099] TT: NMOS-Typical corner & PMOS-Typical corner, which means that the driving capabilities of the NMOS transistors and PMOS transistors in the chip are average, that is, the driving current of the transistors is the average value.

[0100] FF: NMOS-Fast corner & PMOS-Fast corner, which means that the driving capability of the NMOS transistor and the PMOS transistor in the chip is strong, that is, the driving current of the transistor is the maximum value.

[0101] SS: NMOS-slow corner & PMOS-slow corner, which means that the driving capability of the NMOS transistor and the PMOS transistor in the chip is weak, that is, the driving current of the transistor is the minimum.

[0102] FS: NMOS-Fast corner & PMOS-slow corner, indicating that the driving capability of the NMOS transistor in the chip is stronger, while the driving capability of the PMOS transistor is weaker.

[0103] SF: NMOS-slow corner & PMOS-fast corner, indicating that the driving capability of the NMOS transistor in the chip is weaker, while the driving capability of the PMOS transistor is stronger.

[0104] In PVT data, V (Voltage) represents the operating voltage. Usually, this operating voltage represents the minimum operating voltage required by the chip. Different chips have different minimum operating voltages required for the same process scheduling or the same load. The operating voltage of the same chip can also be different under different process angles and temperature conditions.

[0105] In PVT data, T (Temperature) represents the operating temperature of the chip. The operating temperature of the chip is also an important factor affecting chip performance.

[0106] In some embodiments, the terminal may include a PVT sensor and a PVT controller. The PVT sensor is used to detect the current working voltage and working temperature of the chip in real time and provide them to the PVT controller. The PVT controller is used to adjust the working voltage of the chip according to the current working voltage and working temperature of the chip and the PVT data of the chip to ensure that the chip works in real time at the minimum working voltage that meets the system performance. For example, Fig.13 As shown, the PVT sensor can be a voltage monitor, which is used to monitor the current operating voltage of power load chips such as CPU / GPU / Modem and transmit it to the PVT controller. The PVT controller has the PVT data of the chip and the corresponding relationship between the operating frequency and the minimum operating voltage of the chip. The PVT controller can determine the target minimum operating voltage of the chip at the current temperature and operating frequency by combining the corresponding relationship between the temperature and the minimum operating voltage in the PVT data, as well as the corresponding relationship between the operating frequency and the minimum operating voltage. If the current operating voltage sampled by the PVT sensor is much greater than the target minimum operating voltage, it means that reducing the current operating voltage of the chip to close to the target minimum operating voltage can also meet the business operation needs of the chip. The PVT controller can control the power load chip to send a voltage regulation application to the PMIC BUCK chip, and the PMIC BUCK chip adjusts the output voltage of the power supply circuit according to the voltage regulation application. For example, it is adjusted to the target output voltage and provided to the power load chips such as CPU / GPU / Modem. Here, the PMIC BUCK chip refers to a PMIC chip including a BUCK power supply circuit.

[0107] In some embodiments, the current process angle and the current temperature of the target electrical load can be determined. For example, the current process angle and the current temperature of the target electrical load can be detected in real time by a PVT sensor. Among at least one process condition data corresponding to the target electrical load, the process condition data matching the current process angle, the current temperature and the target output voltage is determined as the target process condition data.

[0108] In some embodiments, a search can be performed in at least one process condition data corresponding to the target power load based on the current process angle, the current temperature, and the target output voltage to determine process condition data in which the difference between the process angle and the current process angle is minimum or less than a preset process angle difference threshold, the difference between the temperature and the current temperature is minimum or less than a preset temperature difference threshold, and the difference between the operating voltage and the target output voltage is minimum or less than a preset voltage difference threshold, as target process condition data.

[0109] S1023. According to the target process condition data and the preset corresponding relationship between the process condition data and the operating frequency, the initial target operating frequency is corrected to determine the target operating frequency.

[0110] In an embodiment of the present application, there is a preset correspondence between process condition data and operating frequency on the terminal. The process condition data includes the minimum operating voltage. Therefore, the preset correspondence between process condition data and operating frequency can also be regarded as the preset correspondence between operating voltage and operating frequency under different process angles and temperature conditions. For different process angles and temperatures, the correspondence between the operating frequency and the operating voltage of the chip is different. Exemplarily, the chip runs fastest when the process angle is FF and the temperature is 125 degrees, and the same operating voltage can correspond to a higher operating frequency. For example, 0.7V in Table 1 corresponds to an operating frequency of 800M. If the above process angle is FF and the temperature is 125 degrees, the operating frequency corresponding to 0.7V can be 1G.

[0111] In the embodiment of the present application, according to the target process condition data, in the preset correspondence between the process condition data and the operating frequency, the operating frequency corresponding to the target process condition data is determined as the target operating frequency. Since the target process condition data includes the target output voltage, the initial target operating frequency corresponding to the target output voltage can be updated to the target operating frequency, thereby realizing the correction of the initial target operating frequency using the target process condition data.

[0112] S1024. Determine a target load current range according to a target operating frequency and a preset corresponding relationship between at least one operating frequency and at least one load current range.

[0113] In the embodiment of the present application, in the preset correspondence between at least one operating frequency and at least one load current range, the load current range corresponding to the target operating frequency is determined as the target load current range.

[0114] It can be understood that the embodiment of the present application incorporates the PVT process and temperature voltage detection into the efficiency optimization process of the power supply circuit, and can further optimize the correspondence between the target output voltage and the target load current range for each chip, so that the determined target load current range is more accurate, thereby further improving the efficiency of the power supply circuit and improving the terminal's endurance.

[0115] In some embodiments, in actual application scenarios, the process of performing power management using the power management method in the embodiments of the present application can be as follows: Fig.14 As shown, including:

[0116] S701. Initiate a voltage regulation application.

[0117] In S701, the power load initiates a voltage regulation application to the voting manager in the terminal according to its own business needs.

[0118] S702, DVFS voting.

[0119] In S702, the voting manager updates at least one load voltage corresponding to at least one recorded electrical load according to the load voltage in the voltage regulation application, and determines a maximum voltage according to at least one load voltage as the target output voltage. The PMIC chip on the terminal performs voltage regulation according to the target output voltage, and adjusts the output voltage provided to at least one electrical load to the target output voltage. When the target output voltage of the electrical load is lower than its current operating voltage, S703-S704 is executed. When the target output voltage of the electrical load is higher than its current operating voltage, S705-S706 is executed.

[0120] S703: Frequency reduction.

[0121] S704: Voltage decreases.

[0122] In S703-S704, when the target output voltage of the power load is lower than its current operating voltage, the power load first reduces the operating frequency and then reduces the current operating voltage to the target output voltage.

[0123] S705: Voltage increases.

[0124] S706: The frequency increases.

[0125] In S705-S706, when the target output voltage of the power load is higher than its current operating voltage, the power load first increases the current operating voltage to the target output voltage and then increases the operating frequency.

[0126] S707. Check Vin and Vout.

[0127] In S707, the current input voltage Vin and output voltage Vout of the power supply circuit are determined. For example, the input voltage may be the current battery voltage, and the output voltage may be the target output voltage.

[0128] S708 , determine the load current range corresponding to the Vout voltage.

[0129] In S708, the Vout voltage-Iload load current lookup table is equivalent to the corresponding relationship between the preset output voltage and the load current range. According to the Vout voltage-Iload load current lookup table, the operating frequency corresponding to the Vout voltage and the load current range corresponding to the operating frequency are determined.

[0130] S709 , PVT corrects the load current range corresponding to Vout.

[0131] In S709, the operating frequency determined by the Vout voltage in S708 is used as the initial operating frequency, and the load current range determined in S708 is used as the initial load current range; the corresponding relationship in S708 is corrected according to the PVT data detected in real time. The operating frequency corresponding to the target output voltage is corrected to the operating frequency corresponding to the target PVT data of the electrical load. Then, the load current range is determined according to the operating frequency corresponding to the target PVT data. The process of S709 is consistent with the process description of S1021-S1024 above, and will not be repeated here.

[0132] S710. Adjust the highest efficiency point of the DC / DC circuit according to the load current range.

[0133] In S710, the DC / DC circuit is equivalent to the power supply circuit, and the highest efficiency point of the DC / DC circuit is adjusted to the load current range determined in S709, that is, within the target load current range. The process of S710 is consistent with the process description of S103 above, and will not be repeated here.

[0134] It is understandable that the embodiment of the present application links the voltage adjustment value of DVFS with the efficiency curve, and adjusts the voltage while adjusting the maximum efficiency point of the power supply circuit to the load current range corresponding to the voltage adjustment value, thereby maximizing the use of the power supply circuit (Power Rail) capacity and improving the endurance of the terminal. In addition, the load current range can be corrected using real-time detected PVT data, which improves the accuracy of the target load current range and further improves the efficiency of the power supply circuit and the endurance of the terminal.

[0135] An embodiment of the present application also provides a power management device. Fig.15 A schematic diagram of the structure of a power management device provided in an embodiment of the present application; Fig.15As shown, the power management device 1 includes a determination module 11 and an adjustment module 12, wherein:

[0136] The determination module 11 is used to determine a target output voltage according to at least one load voltage corresponding to at least one electrical load; and determine a target load current range corresponding to the target output voltage based on a preset correspondence between an output voltage and a load current range;

[0137] The adjustment module 12 is used to adjust the maximum output efficiency of the power supply circuit to the target load current range by adjusting the circuit configuration of the power supply circuit; the power supply circuit is used to supply power to the at least one electrical load.

[0138] In some embodiments, the preset correspondence between the output voltage and the load current range includes: a preset correspondence between at least one output voltage and at least one operating frequency, and a preset correspondence between the at least one operating frequency and at least one load current range.

[0139] In some embodiments, the determination module 11 is further used to determine the initial target operating frequency corresponding to the target output voltage according to the preset correspondence between the at least one output voltage and the at least one operating frequency; determine the target process condition data corresponding to the target power load based on the target output voltage; the target power load is the power load corresponding to the target output voltage in the at least one power load; correct the initial target operating frequency according to the target process condition data and the preset correspondence between the process condition data and the operating frequency to determine the target operating frequency; determine the target load current range according to the target operating frequency and the preset correspondence between the at least one operating frequency and at least one load current range.

[0140] In some embodiments, the power supply circuit includes: a single-phase power conversion circuit, and the circuit configuration includes: at least one of a switch configuration and a drive circuit configuration.

[0141] In some embodiments, the switch configuration includes: the number of switches; the adjustment module 12 is also used to reduce the number of switches when the target load current range is lower than a first preset load current threshold; and increase the number of switches when the target load current range is higher than or equal to the first preset load current threshold.

[0142] In some embodiments, the switch configuration includes: a switch tube operating frequency; the adjustment module 12 is also used to adjust the maximum output efficiency to the target load current range by adjusting the switch tube operating frequency in the power supply circuit; the switch tube operating frequency is inversely proportional to the output efficiency.

[0143] In some embodiments, the switch configuration includes: a switch mode; the adjustment module 12 is also used to adjust the switch mode to a continuous conduction mode when the target load current range is higher than a second preset load current threshold; when the target load current range is higher than a third preset load current threshold and not higher than the second preset load current threshold, adjust the switch mode to a discontinuous conduction mode; the second preset load rate threshold is higher than the third preset load rate threshold; when the target load current range is not higher than the third preset load current threshold, adjust the switch mode to a pulse frequency modulation mode or a burst mode.

[0144] In some embodiments, the power supply circuit includes a driving circuit, which is used to provide a driving level for the power supply circuit; the driving circuit configuration includes: at least one of an operating frequency of a driving circuit switch tube, a number of driving circuit switches, and a driving circuit switching mode; the adjustment module 12 is also used to adjust the driving level by adjusting at least one of the operating frequency of the driving circuit switch tube, the number of driving circuit switches, and the driving circuit switching mode, so as to adjust the maximum output efficiency to the target load current range.

[0145] In some embodiments, the adjustment module 12 is also used to adjust the circuit configuration in combination with the input voltage of the single-phase power conversion circuit to adjust the maximum output efficiency to the target load current range; the voltage difference between the input voltage and the target output voltage is inversely proportional to the output efficiency.

[0146] In some embodiments, the power supply circuit includes: a multi-phase power conversion circuit, the circuit configuration includes: a phase switching point; the adjustment module 12 is also used to adjust the maximum output efficiency to the target load current range by adjusting at least one phase switching point of the multi-phase power conversion circuit to outside the target load current range.

[0147] In some embodiments, the process condition data includes: process angle, operating voltage and temperature; the determination module 11 is also used to determine the current process angle and current temperature of the target power load; in at least one process condition data corresponding to the target power load, the process condition data matching the current process angle, the current temperature and the target output voltage is determined as the target process condition data.

[0148] It should be noted that the description of the above device embodiment is similar to the description of the above method embodiment, and has similar beneficial effects as the method embodiment. For technical details not disclosed in the device embodiment of the present application, please refer to the description of the method embodiment of the present application for understanding.

[0149] The embodiment of the present application also provides a chip, Fig.16 This is an optional structural diagram of a chip provided in an embodiment of the present application. Fig.16 As shown, the chip 2 includes: a memory 22 and a processor 23. The memory 22 and the processor 23 are connected via a communication bus 24; the memory 22 is used to store executable instructions; the processor 23 is used to execute the executable instructions stored in the memory 22 to implement the power management method provided in the embodiment of the present application.

[0150] The present application also provides a terminal in which the chip provided in the above embodiment can be integrated. Fig.16 As shown, the chip 2 may include a processor 23 and a memory 22 storing executable instructions of the processor; the processor 23 and the memory 22 communicate via a communication bus 24; the processor 23 may call and run executable instructions from the memory 22 to implement the power management method provided in an embodiment of the present application.

[0151] An embodiment of the present application provides a computer-readable storage medium storing executable instructions, wherein executable instructions are stored. When the executable instructions are executed by a processor, the processor will execute the power management method provided by the embodiment of the present application.

[0152] In some embodiments, the computer-readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface storage, optical disk, or CD-ROM; or it may be various devices including one or any combination of the above memories.

[0153] In some embodiments, executable instructions may be in the form of a program, software, software module, script or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine or other unit suitable for use in a computing environment.

[0154] As an example, executable instructions may, but need not, correspond to a file in a file system, may be stored as part of a file that stores other programs or data, such as in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or code portions).

[0155] By way of example, executable instructions may be deployed to be executed on one computing device, or on multiple computing devices located at one site, or on multiple computing devices distributed across multiple sites and interconnected by a communication network.

[0156] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of hardware embodiments, software embodiments, or embodiments in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0157] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0158] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0159] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0160] The above is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present application are included in the protection scope of the present application.

Claims

1. A power management method, characterized in that: include: determining a target output voltage according to at least one load voltage corresponding to at least one electrical load; Determining a target load current range corresponding to the target output voltage based on a preset correspondence relationship between the output voltage and the load current range; By adjusting the circuit configuration of the power supply circuit, the maximum output efficiency of the power supply circuit is adjusted to the target load current range; the power supply circuit is used to supply power to the at least one electrical load.

2. The method according to claim 1, characterized in that The preset corresponding relationship between the output voltage and the load current range includes: a preset corresponding relationship between at least one output voltage and at least one operating frequency, and a preset corresponding relationship between the at least one operating frequency and at least one load current range.

3. The method according to claim 2, characterized in that The determining, based on the correspondence between the preset output voltage and the load current range, a target load current range corresponding to the target output voltage includes: Determining an initial target operating frequency corresponding to the target output voltage according to a preset correspondence relationship between the at least one output voltage and the at least one operating frequency; Based on the target output voltage, determining target process condition data corresponding to a target electrical load; the target electrical load is an electrical load corresponding to the target output voltage in the at least one electrical load; According to the target process condition data and the preset corresponding relationship between the process condition data and the operating frequency, the initial target operating frequency is corrected to determine the target operating frequency; The target load current range is determined according to the target operating frequency and a preset corresponding relationship between the at least one operating frequency and the at least one load current range.

4. The method according to any one of claims 1 to 3, characterized in that: The power supply circuit includes: a single-phase power conversion circuit, and the circuit configuration includes: at least one of a switch configuration and a drive circuit configuration.

5. The method according to claim 4, characterized in that The switch configuration includes: the number of switches; and adjusting the maximum output efficiency of the power supply circuit to the target load current range by adjusting the circuit configuration of the power supply circuit includes: When the target load current range is lower than a first preset load current threshold, reducing the number of switches; When the target load current range is higher than or equal to the first preset load current threshold, the number of switches is increased.

6. The method according to claim 4, characterized in that The switch configuration includes: the operating frequency of the switch tube; the circuit configuration of the power supply circuit is adjusted to adjust the maximum output efficiency to the target load current range, including: The maximum output efficiency is adjusted to the target load current range by adjusting the operating frequency of the switch tube in the power supply circuit; the operating frequency of the switch tube is inversely proportional to the output efficiency.

7. The method according to claim 4, characterized in that The switch configuration includes: a switch mode; and adjusting the circuit configuration of the power supply circuit to adjust the maximum output efficiency of the power supply circuit to the target load current range includes: When the target load current range is higher than a second preset load current threshold, adjusting the switch mode to a continuous conduction mode; When the target load current range is higher than a third preset load current threshold and not higher than the second preset load current threshold, adjusting the switch mode to a discontinuous conduction mode; and the second preset load rate threshold is higher than the third preset load rate threshold; When the target load current range is not higher than the third preset load current threshold, the switching mode is adjusted to a pulse frequency modulation mode or a burst mode.

8. The method according to claim 4, characterized in that The power supply circuit includes a drive circuit, and the drive circuit is used to provide a drive level for the power supply circuit; the drive circuit configuration includes: at least one of the operating frequency of the drive circuit switch tube, the number of the drive circuit switch tubes, and the drive circuit switch mode; the maximum output efficiency of the power supply circuit is adjusted to the target load current range by adjusting the circuit configuration of the power supply circuit, including: The driving level is adjusted by adjusting at least one of the operating frequency of the driving circuit switch tube, the number of the driving circuit switch tubes and the driving circuit switching mode, so as to adjust the maximum output efficiency to the target load current range.

9. The method according to any one of claims 5 to 8, characterized in that: The step of adjusting the circuit configuration of the power supply circuit to adjust the maximum output efficiency of the power supply circuit to the target load current range includes: The circuit configuration is adjusted in combination with the input voltage of the single-phase power conversion circuit to adjust the maximum output efficiency to the target load current range; the voltage difference between the input voltage and the target output voltage is inversely proportional to the output efficiency.

10. The method according to any one of claims 1 to 3, characterized in that: The power supply circuit includes: a multi-phase power conversion circuit, the circuit configuration includes: a phase switching point; the circuit configuration of the power supply circuit is adjusted to adjust the maximum output efficiency of the power supply circuit to the target load current range, including: The maximum output efficiency is adjusted to the target load current range by adjusting at least one phase switching point of the multi-phase power conversion circuit to outside the target load current range.

11. The method according to claim 3, characterized in that The process condition data includes: process angle, operating voltage and temperature; the target process condition data corresponding to the target power load is determined based on the target output voltage, including: Determine the current process angle and current temperature of the target electrical load; Among at least one process condition data corresponding to the target power load, the process condition data matching the current process angle, the current temperature and the target output voltage is determined as the target process condition data.

12. A power management device, characterized in that: include: A determination module, configured to determine a target output voltage according to at least one load voltage corresponding to at least one electrical load; and determining a target load current range corresponding to the target output voltage based on a preset correspondence between the output voltage and the load current range; The adjustment module is used to adjust the maximum output efficiency of the power supply circuit to the target load current range by adjusting the circuit configuration of the power supply circuit; the power supply circuit is used to supply power to the at least one electrical load.

13. A chip, characterized in that: include: A memory and a processor; wherein, The memory is used to store executable instructions; The processor is used to implement the method according to any one of claims 1 to 11 when executing the executable instructions stored in the memory.

14. A terminal, characterized in that: include: Voltage frequency control circuit, power supply circuit, memory and processor; wherein, The memory is used to store executable instructions; The processor is used to implement the method according to any one of claims 1 to 11 when executing the executable instructions stored in the memory.

15. A computer-readable storage medium, characterized in that: Executable instructions are stored, which are used to cause a processor to execute and implement the method described in any one of claims 1 to 11.

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