A power supply light load optimization method and system

Abstract

A power supply light-load optimization method and system are disclosed. The power supply includes a DC-DC conversion circuit. The load connected to the power supply is monitored in real time to obtain the power supply's output parameters to the load. Based on the output parameters, the power supply is controlled to enter one of several operating modes to provide corresponding power to the load. These operating modes include normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode. By automatically reducing the switching frequency, periodically shutting down the circuit through hiccup mode, and entering sleep mode, the switching losses and static power consumption of the DC-DC conversion circuit are significantly reduced. The automatic frequency conversion mode ensures a good input current waveform, preventing a drop in the power factor (PF) value under light load. During the sleep period of hiccup mode, the main control circuit is simultaneously shut down, reducing the system's standby power consumption to an extremely low level, meeting relevant energy efficiency standards. Furthermore, the minimum switching frequency can be set above 20kHz to avoid audible noise.

Description

Technical Field

[0001] This invention relates to the field of power electronics, and more particularly to a power supply light-load optimization method and system. Background Technology

[0002] In scenarios such as data centers and communication base stations that require parallel power supply to multiple modules, dynamically adjusting the data volume of the working modules can solve problems such as low power factor, decreased efficiency, and high standby power consumption under light loads. Traditional switching power supplies suffer from excessively high switching losses and significant efficiency drops under light loads due to the fixed power PWM mode. While existing technologies such as Burst Mode and Skip Cycle can alleviate these problems, they still suffer from slow dynamic response or large ripple. Furthermore, they lack effective protection mechanisms when the power supply is operating at low output, making them susceptible to damage from short circuits or overcurrents.

[0003] Traditional multi-module power supply systems suffer from the following drawbacks under light loads: First, low power factor; when a single module's load rate is below 30%, the power factor may drop below 0.9, leading to increased reactive power losses in the power grid. Second, power reduction; at a 20% load rate, the module's efficiency is 10%-15% lower than at full load, resulting in energy waste. Third, high standby power consumption; with all modules running continuously, the proportion of static power consumption increases significantly. Existing technologies mostly employ fixed module counts or simple threshold control, failing to balance dynamic response and energy efficiency optimization. Summary of the Invention

[0004] The purpose of this invention is to provide a power supply light-load optimization method and system. The power supply includes a DC-DC conversion circuit. The system monitors the load connected to the power supply in real time to obtain the power supply's output parameters to the load. Based on the output parameters, the power supply is controlled to enter one of several operating modes, thereby providing corresponding power to the load. These operating modes include normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode. By automatically reducing the switching frequency, periodically shutting down the circuit through hiccup mode, and entering sleep mode, the switching losses and static power consumption of the DC-DC conversion circuit are significantly reduced. The automatic frequency conversion mode ensures a good input current waveform, preventing a drop in the power factor (PF) value under light load. During the sleep period of hiccup mode, the main control circuit is simultaneously shut down, reducing the system's standby power consumption to an extremely low level, meeting relevant energy efficiency standards. Furthermore, the minimum switching frequency can be set above 20kHz to avoid audible noise.

[0005] The objective of this invention is achieved through the following technical solution: A power supply light-load optimization method, wherein the power supply includes a DC-DC conversion circuit, comprising: The load connected to the power supply is monitored in real time to obtain the output parameters of the power supply to the load; Based on the output parameters, the power supply is controlled to enter one of several operating modes, thereby providing corresponding power to the load; wherein, the several operating modes include normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode.

[0006] In one embodiment, the load connected to the power supply is monitored in real time to obtain the output parameters of the power supply to the load, including: The load connected to the power supply is monitored in real time to obtain the output current or output power of the power supply to the load. When the output current of the power supply to the load is detected in real time, the output power of the power supply to the load is determined based on the output current.

[0007] In one embodiment, the power supply is controlled to enter one of several operating modes based on the output parameters, including: The output power is compared with a threshold. If the output power is greater than the first power threshold, the power supply is controlled to enter the normal mode. When the output power is greater than the second power threshold and less than or equal to the first power threshold, the power supply is controlled to enter the automatic frequency conversion mode. When the output power is greater than the third power threshold and less than or equal to the second power threshold, the power supply is controlled to enter the hiccup mode; When the output power is less than or equal to the third power threshold, the power supply is controlled to enter sleep mode.

[0008] In one embodiment, when the power supply is controlled to enter normal mode, the DC-DC conversion circuit operates normally, and the switching frequency F_rated of the DC-DC conversion circuit is a fixed frequency value F_rated. When the power supply is controlled to enter the automatic frequency conversion mode, the switching frequency F_rated of the DC-DC conversion circuit is reduced linearly or segmentally according to the reduction of the output power, until the switching frequency F_rated is reduced to the preset minimum frequency value. When the power supply is controlled to enter hiccup mode, the DC-DC conversion circuit enters a state of intermittently stopping and restarting. When the power supply is controlled to enter sleep mode, it supplies power to only one of the loads and does not supply power to the other loads.

[0009] In one embodiment, when the power supply is controlled to enter a hiccup mode, the power factor correction circuit and the DC-DC conversion circuit enter a corresponding operating state, including: When the power supply is controlled to enter hiccup mode, the hiccup mode includes a corresponding burst pulse group stage and a corresponding rest stage; when in the rest stage, the DC-DC conversion circuit is turned off, and only the power supply's sleep-wake circuit is kept working.

[0010] A power supply light-load optimization system, the power supply including a DC-DC conversion circuit, comprising: The detection module is used to detect the load connected to the power supply in real time and obtain the output parameters of the power supply to the load. The power supply operating mode control module is used to control the power supply to enter one of several operating modes according to the output parameters, thereby providing corresponding power supply to the load; wherein, the several operating modes include normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode.

[0011] In one embodiment, the detection module is used to detect the load connected to the power supply in real time, and obtain the output parameters of the power supply to the load, including: The load connected to the power supply is monitored in real time to obtain the output current or output power of the power supply to the load. When the output current of the power supply to the load is detected in real time, the output power of the power supply to the load is determined based on the output current.

[0012] In one embodiment, the power supply operating mode control module is used to control the power supply to enter one of several operating modes according to the output parameters, including: The output power is compared with a threshold. If the output power is greater than the first power threshold, the power supply is controlled to enter the normal mode. When the output power is greater than the second power threshold and less than or equal to the first power threshold, the power supply is controlled to enter the automatic frequency conversion mode. When the output power is greater than the third power threshold and less than or equal to the second power threshold, the power supply is controlled to enter the hiccup mode; When the output power is less than or equal to the third power threshold, the power supply is controlled to enter sleep mode.

[0013] In one embodiment, when the power supply is controlled to enter normal mode, the DC-DC conversion circuit operates normally, and the switching frequency F_rated of the DC-DC conversion circuit is a fixed frequency value F_rated. When the power supply is controlled to enter the automatic frequency conversion mode, the switching frequency F_rated of the DC-DC conversion circuit is reduced linearly or segmentally according to the reduction of the output power, until the switching frequency F_rated is reduced to the preset minimum frequency value. When the power supply is controlled to enter hiccup mode, the DC-DC conversion circuit enters a state of intermittently stopping and restarting. When the power supply is controlled to enter sleep mode, it supplies power to only one of the loads and does not supply power to the other loads.

[0014] In one embodiment, when the power supply is controlled to enter a hiccup mode, the power factor correction circuit and the DC-DC conversion circuit enter a corresponding operating state, including: When the power supply is controlled to enter hiccup mode, the hiccup mode includes a corresponding burst pulse group stage and a corresponding rest stage; when in the rest stage, the DC-DC conversion circuit is turned off, and only the power supply's sleep-wake circuit is kept working.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The power supply light-load optimization method and system provided in this application include a power supply comprising a DC-DC conversion circuit; real-time detection of the load connected to the power supply to obtain the power supply's output parameters to the load; and control of the power supply to enter one of several operating modes based on the output parameters, thereby providing corresponding power supply to the load. These operating modes include normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode. By automatically reducing the switching frequency, periodically shutting down the circuit through hiccup mode, and entering sleep mode, the switching losses and static power consumption of the DC-DC conversion circuit are significantly reduced. The automatic frequency conversion mode ensures a good input current waveform, preventing a drop in the power factor (PF) value under light load. During the sleep period of hiccup mode, the main control circuit is simultaneously shut down, reducing the system's standby power consumption to an extremely low level, meeting relevant energy efficiency standards. Furthermore, the minimum switching frequency can be set above 20kHz to avoid audible noise. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a flowchart illustrating the power supply light-load optimization method provided in this application.

[0017] Figure 2 This is a schematic diagram of the power supply light load optimization system provided in this application.

[0018] Figure 3 This is a comparison diagram of the drive waveforms of a DC-DC converter circuit under normal operating conditions and under reduced switching frequency conditions.

[0019] Figure 4 This is a comparison chart of the drive waveforms of the power supply in normal mode and hiccup mode. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0021] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] Please see Figure 1 As shown, an embodiment of this application provides a power supply light-load optimization method. The power supply includes a power factor correction circuit and a DC-DC conversion circuit, comprising: Real-time monitoring of the load connected to the power supply to obtain the power supply's output parameters to the load; Based on the output parameters, the control power supply enters one of several operating modes to supply power to the load accordingly; among these operating modes are normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode.

[0024] The beneficial effects of the above embodiments are as follows: This power supply light load optimization method detects the load connected to the power supply in real time to obtain the power supply's output parameters to the load; based on the output parameters, it controls the power supply to enter one of several operating modes, thereby providing corresponding power to the load; the several operating modes include normal mode, automatic frequency conversion mode, and hiccup mode. By automatically reducing the switching frequency and periodically shutting down the circuit through hiccup mode, the switching losses and static power consumption of the DC-DC conversion circuit are significantly reduced; the automatic frequency conversion mode ensures a good input current waveform, avoiding a drop in the power factor (PF) value under light load; and the main control circuit is shut down simultaneously during the hiccup mode's sleep period, reducing the system's standby power consumption to an extremely low level, meeting the corresponding energy efficiency standards. Furthermore, the minimum switching frequency can be set above 20kHz to avoid audible noise.

[0025] In one embodiment, the load connected to the power supply is detected in real time to obtain the output parameters of the power supply to the load, including: Real-time monitoring of the load connected to the power supply to obtain the power supply's output current or output power to the load; When the output current of the power supply to the load is detected in real time, the output power of the power supply to the load is determined based on the output current.

[0026] The beneficial effects of the above embodiments are as follows: In actual operation, the power supply is detected in real time to obtain the real-time output current or output power of the power supply, and the real-time power supply status of the power supply to the load is quantitatively determined; in particular, when the output current of the power supply to the load is detected in real time, the output power of the power supply to the load is determined according to the output current, and finally the subsequent working mode switching is based on the output power of the power supply.

[0027] In one embodiment, controlling the power supply to enter one of several operating modes based on output parameters includes: The output power is compared to a threshold. When the output power is greater than the first power threshold, the power supply is controlled to enter normal mode. When the output power is greater than the second power threshold and less than or equal to the first power threshold, the control power supply enters the automatic frequency conversion mode. When the output power is greater than the third power threshold and less than or equal to the second power threshold, the power supply is controlled to enter hiccup mode. When the output power is less than or equal to the third power threshold, the control power supply enters sleep mode.

[0028] The beneficial effects of the above embodiments are as follows: In actual operation, the real-time output power of the power supply is compared with the first power threshold, the second power threshold, and the third power threshold, so as to control the power supply to enter any one of the normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode, to ensure that the power supply can enter a suitable working mode and improve the working efficiency of the power supply; when switching to sleep mode, the power factor can be improved, harmonics can be reduced, and efficiency can be improved.

[0029] In one embodiment, when the control power supply enters normal mode, the DC-DC conversion circuit operates normally, and the switching frequency F_rated of the DC-DC conversion circuit is a fixed frequency value F_rated. When the control power supply enters the automatic frequency conversion mode, the switching frequency F_rated of the DC-DC conversion circuit is reduced linearly or segmentally according to the reduction of output power until the switching frequency F_rated is reduced to the preset minimum frequency value. When the control power supply enters hiccup mode, the DC-DC conversion circuit enters a state of intermittently stopping and restarting. When the power supply enters sleep mode, it supplies power to only one of the loads and not to the other loads.

[0030] The beneficial effects of the above embodiments are as follows: Through the above process, when the control power supply enters the automatic frequency conversion mode, the power factor correction circuit works normally, and according to the decrease in output power, the switching frequency F_rated of the DC-DC conversion circuit is reduced linearly or piecewise until the switching frequency F_rated is reduced to a preset minimum frequency value, such as... Figure 3 As shown, the drive waveform corresponding to the reduced input switching frequency of the DC-DC converter circuit is used to achieve automatic frequency reduction of the entire power supply.

[0031] In one embodiment, when the control power supply enters hiccup mode, the power factor correction circuit and the DC-DC conversion circuit enter corresponding operating states, including: When the power supply enters hiccup mode, hiccup mode includes a burst pulse group phase corresponding to operation and a sleep phase corresponding to rest. When in sleep phase, the DC-DC conversion circuit is turned off, and only the power supply's sleep wake-up circuit is kept working.

[0032] The beneficial effect of the above embodiments is that when the control power supply enters the hiccup mode, such as Figure 4 As shown, the corresponding hiccup mode drive waveform is input, and the main control circuits such as the DC-DC conversion circuit are turned off during the hiccup mode sleep period, so that the system standby power consumption is reduced to an extremely low level to meet the most stringent energy efficiency standards.

[0033] Please see Figure 2 As shown, an embodiment of this application provides a power supply light-load optimization system, the power supply including a DC-DC conversion circuit, comprising: The detection module is used to detect the load connected to the power supply in real time and obtain the output parameters of the power supply to the load. The power supply operating mode control module is used to control the power supply to enter one of several operating modes according to the output parameters, thereby providing corresponding power supply to the load; among these operating modes are normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode.

[0034] The beneficial effects of the above embodiments are as follows: The power supply light load optimization system detects the load connected to the power supply in real time to obtain the output parameters of the power supply to the load; based on the output parameters, it controls the power supply to enter one of several operating modes, thereby providing corresponding power supply to the load; the several operating modes include normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode. By automatically reducing the switching frequency, periodically shutting down the circuit through hiccup mode, and using sleep mode, the switching losses and static power consumption of the DC-DC conversion circuit are significantly reduced; the automatic frequency conversion mode ensures a good input current waveform and avoids a drop in the power factor (PF) value under light load; and the main control circuit is shut down during the sleep period of hiccup mode, reducing the system standby power consumption to an extremely low level to meet the corresponding energy efficiency standards. Furthermore, the minimum switching frequency can be set above 20kHz to avoid audible noise.

[0035] In one embodiment, the detection module is used to detect the load connected to the power supply in real time to obtain the output parameters of the power supply to the load, including: Real-time monitoring of the load connected to the power supply to obtain the power supply's output current or output power to the load; When the output current of the power supply to the load is detected in real time, the output power of the power supply to the load is determined based on the output current.

[0036] The beneficial effects of the above embodiments are as follows: In actual operation, the power supply is detected in real time to obtain the real-time output current or output power of the power supply, and the real-time power supply status of the power supply to the load is quantitatively determined; in particular, when the output current of the power supply to the load is detected in real time, the output power of the power supply to the load is determined according to the output current, and finally the subsequent working mode switching is based on the output power of the power supply.

[0037] In one embodiment, the power supply operating mode control module is used to control the power supply to enter one of several operating modes according to output parameters, including: The output power is compared to a threshold. When the output power is greater than the first power threshold, the power supply is controlled to enter normal mode. When the output power is greater than the second power threshold and less than or equal to the first power threshold, the control power supply enters the automatic frequency conversion mode. When the output power is greater than the third power threshold and less than or equal to the second power threshold, the power supply is controlled to enter hiccup mode. When the output power is less than or equal to the third power threshold, the control power supply enters sleep mode.

[0038] The beneficial effects of the above embodiments are as follows: In actual operation, the real-time output power of the power supply is compared with the first power threshold, the second power threshold, and the third power threshold, so as to control the power supply to enter any one of the normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode, to ensure that the power supply can enter a suitable working mode and improve the working efficiency of the power supply; when switching to sleep mode, the power factor can be improved, harmonics can be reduced, and efficiency can be improved.

[0039] In one embodiment, when the control power supply enters normal mode, the DC-DC conversion circuit operates normally, and the switching frequency F_rated of the DC-DC conversion circuit is a fixed frequency value F_rated. When the control power supply enters the automatic frequency conversion mode, the switching frequency F_rated of the DC-DC conversion circuit is reduced linearly or segmentally according to the reduction of output power until the switching frequency F_rated is reduced to the preset minimum frequency value. When the control power supply enters hiccup mode, the DC-DC conversion circuit enters a state of intermittently stopping and restarting. When the power supply enters sleep mode, it supplies power to only one of the loads and not to the other loads.

[0040] The beneficial effects of the above embodiments are as follows: Through the above process, when the control power supply enters the automatic frequency conversion mode, the power factor correction circuit works normally, and according to the decrease in output power, the switching frequency F_rated of the DC-DC conversion circuit is reduced linearly or piecewise until the switching frequency F_rated is reduced to a preset minimum frequency value, such as... Figure 3 As shown, the drive waveform corresponding to the reduced input switching frequency of the DC-DC converter circuit is used to achieve automatic frequency reduction of the entire power supply.

[0041] In one embodiment, when the control power supply enters hiccup mode, the power factor correction circuit and the DC-DC conversion circuit enter corresponding operating states, including: When the power supply enters hiccup mode, hiccup mode includes a burst pulse group phase corresponding to operation and a sleep phase corresponding to rest. When in sleep phase, the DC-DC conversion circuit is turned off, and only the power supply's sleep wake-up circuit is kept working.

[0042] The beneficial effect of the above embodiments is that when the control power supply enters the hiccup mode, such as Figure 4As shown, the corresponding hiccup mode drive waveform is input, and the main control circuits such as the DC-DC conversion circuit are turned off during the hiccup mode sleep period, so that the system standby power consumption is reduced to an extremely low level to meet the most stringent energy efficiency standards.

[0043] The above is only one specific embodiment of the present invention, and any improvements made based on the concept of the present invention shall be considered within the scope of protection of the present invention.

Claims

1. A power supply light load optimization method, said power supply comprising a dc-dc conversion circuit, characterized by, include: The load connected to the power supply is monitored in real time to obtain the output parameters of the power supply to the load; Based on the output parameters, the power supply is controlled to enter one of several operating modes, thereby providing corresponding power to the load; wherein, the several operating modes include normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode.

2. The power supply light load optimization method according to claim 1, characterized in that, The load connected to the power supply is monitored in real time to obtain the output parameters of the power supply to the load, including: The load connected to the power supply is monitored in real time to obtain the output current or output power of the power supply to the load. When the output current of the power supply to the load is detected in real time, the output power of the power supply to the load is determined based on the output current.

3. The power supply light load optimization method according to claim 2, characterized in that, Based on the output parameters, the power supply is controlled to enter one of several operating modes, including: The output power is compared with a threshold. If the output power is greater than the first power threshold, the power supply is controlled to enter the normal mode. When the output power is greater than the second power threshold and less than or equal to the first power threshold, the power supply is controlled to enter the automatic frequency conversion mode. When the output power is greater than the third power threshold and less than or equal to the second power threshold, the power supply is controlled to enter the hiccup mode; When the output power is less than or equal to the third power threshold, the power supply is controlled to enter sleep mode.

4. The power supply light load optimization method according to claim 3, characterized in that, When the power supply is controlled to enter normal mode, the DC-DC conversion circuit works normally, and the switching frequency F_rated of the DC-DC conversion circuit is a fixed frequency value F_rated. When the power supply is controlled to enter the automatic frequency conversion mode, the switching frequency F_rated of the DC-DC conversion circuit is reduced linearly or segmentally according to the reduction of the output power, until the switching frequency F_rated is reduced to the preset minimum frequency value. When the power supply is controlled to enter hiccup mode, the DC-DC conversion circuit enters a state of intermittently stopping and restarting. When the power supply is controlled to enter sleep mode, it supplies power to only one of the loads and does not supply power to the other loads.

5. The power supply light load optimization method according to claim 4, characterized in that, When the power supply is controlled to enter hiccup mode, the power factor correction circuit and the DC-DC conversion circuit enter the corresponding operating states, including: When the power supply is controlled to enter hiccup mode, the hiccup mode includes a corresponding burst pulse group stage and a corresponding rest stage; when in the rest stage, the DC-DC conversion circuit is turned off, and only the power supply's sleep-wake circuit is kept working.

6. A power supply light load optimization system, the power supply including a DC-DC conversion circuit, characterized by, include: The detection module is used to detect the load connected to the power supply in real time and obtain the output parameters of the power supply to the load. The power supply operating mode control module is used to control the power supply to enter one of several operating modes according to the output parameters, thereby providing corresponding power supply to the load; wherein, the several operating modes include normal mode, automatic frequency conversion mode, hiccup mode, and sleep mode.

7. The power supply light-load optimization system according to claim 6, characterized in that, The detection module is used to detect the load connected to the power supply in real time, and obtain the output parameters of the power supply to the load, including: The load connected to the power supply is monitored in real time to obtain the output current or output power of the power supply to the load. When the output current of the power supply to the load is detected in real time, the output power of the power supply to the load is determined based on the output current.

8. The power supply light-load optimization system according to claim 7, characterized in that, The power supply operating mode control module is used to control the power supply to enter one of several operating modes according to the output parameters, including: The output power is compared with a threshold. If the output power is greater than the first power threshold, the power supply is controlled to enter the normal mode. When the output power is greater than the second power threshold and less than or equal to the first power threshold, the power supply is controlled to enter the automatic frequency conversion mode. When the output power is greater than the third power threshold and less than or equal to the second power threshold, the power supply is controlled to enter the hiccup mode; When the output power is less than or equal to the third power threshold, the power supply is controlled to enter sleep mode.

9. The power supply light-load optimization system according to claim 8, characterized in that, When the power supply is controlled to enter normal mode, the DC-DC conversion circuit works normally, and the switching frequency F_rated of the DC-DC conversion circuit is a fixed frequency value F_rated. When the power supply is controlled to enter the automatic frequency conversion mode, the switching frequency F_rated of the DC-DC conversion circuit is reduced linearly or segmentally according to the reduction of the output power, until the switching frequency F_rated is reduced to the preset minimum frequency value. When the power supply is controlled to enter hiccup mode, the DC-DC conversion circuit enters a state of intermittently stopping and restarting. When the power supply is controlled to enter sleep mode, it supplies power to only one of the loads and does not supply power to the other loads.

10. The power supply light-load optimization system according to claim 9, characterized in that, When the power supply is controlled to enter hiccup mode, the power factor correction circuit and the DC-DC conversion circuit enter the corresponding operating states, including: When the power supply is controlled to enter hiccup mode, the hiccup mode includes a corresponding burst pulse group stage and a corresponding rest stage; when in the rest stage, the DC-DC conversion circuit is turned off, and only the power supply's sleep-wake circuit is kept working.

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