Control method and control circuit of power supply equipment and electronic equipment

Abstract

The invention discloses a control method and control circuit of a power supply device and an electronic device, and belongs to the technical field of computers, and the control method of the power supply device comprises the following steps: monitoring a power supply state of the power supply device for supplying power to a load device; and under the condition that the power supply state is abnormal, controlling a bleeder circuit arranged in the power supply equipment to discharge residual voltage in the power supply equipment.

Description

Technical Field

[0001] The present application belongs to the field of computer technology, and in particular, relates to a control method, a control circuit and an electronic device of a power supply device. Background Art

[0002] When an electronic device's power supply experiences an abnormality such as overcurrent or overvoltage, the fault protection mechanism will shut down and lock the power output of the power supply, requiring the power supply and system to be restarted for user use.

[0003] At present, some electronic devices (such as desktop computers) have problems with low efficiency and long restart time of the power supply and system when the power output of the power supply is shut down and locked based on the fault protection mechanism so that the power supply and the system need to be restarted. Summary of the invention

[0004] To this end, this application discloses the following technical solutions:

[0005] A control method for a power supply device, comprising:

[0006] Monitor the power supply status of the power supply equipment to the load equipment;

[0007] When the power supply state is abnormal, a discharge circuit provided in the power supply device is controlled to discharge the residual pressure in the power supply device.

[0008] Optionally, controlling a discharge circuit provided in the power supply device to discharge residual pressure in the power supply device includes:

[0009] The discharge circuit is controlled to reduce the voltage of the power supply device from a target voltage to a first voltage, where the first voltage is used to enable the power supply device to obtain a restart signal.

[0010] Optionally, controlling the discharge circuit to reduce the voltage of the power supply device from the target voltage to the first voltage includes at least one of the following:

[0011] In response to detecting that the power supply state is abnormal, triggering the discharge circuit to reduce the voltage of the power supply device from a second voltage to the first voltage, where the second voltage is a working voltage when the power supply state is normal;

[0012] In response to detecting that the power supply state is abnormal, the voltage of the power supply device is reduced from the second voltage to a third voltage through the load device, and the discharge circuit is triggered to reduce the voltage of the power supply device from the third voltage to the first voltage.

[0013] Optionally, a circuit between the output terminal of the power supply device and the control chip of the power supply device reduces the voltage of the power supply device from the target voltage to the first voltage for a first time period;

[0014] The bleeder circuit reduces the voltage of the power supply device from the target voltage to the first voltage for a second time period;

[0015] The first duration is greater than the second duration.

[0016] Optionally, the method further includes:

[0017] In response to the power supply device obtaining the restart signal, the control chip controls the power supply device to restart, and the control chip controls the discharge circuit to be disconnected.

[0018] Optionally, the control chip controls the discharge circuit to be disconnected, including at least one of the following:

[0019] In response to the voltage of the control chip dropping to the first voltage, the control chip sends a first signal to the discharge circuit, and the discharge circuit is disconnected;

[0020] In response to the control chip switching from the working state to the non-working state, the control chip sends a second signal to the discharge circuit, and the discharge circuit is disconnected;

[0021] In response to the power supply device being restarted, the control chip sends a third signal to the discharge circuit, and the discharge circuit is disconnected.

[0022] A control circuit, applied to a power supply device, comprises: a control chip and a discharge circuit;

[0023] The control chip is used to control the discharge circuit to discharge the residual pressure in the power supply device when the power supply state of the power supply device is abnormal.

[0024] Optionally, the discharge circuit includes a first circuit and a second circuit;

[0025] When the power supply state is normal, the first circuit is turned on and the second circuit is turned off; when the power supply state is abnormal, the first circuit is turned off and the second circuit is turned on to discharge the residual pressure in the power supply device; or,

[0026] The discharge circuit includes a third circuit;

[0027] The third circuit includes a third switch; when the power supply state is normal, the third switch is turned off and the third circuit is disconnected; when the power supply state is abnormal, the third switch is turned on and the third circuit is grounded.

[0028] Optionally, the first circuit includes a first resistor and a first switch component connected in series between the control chip and the output end of the power supply device, and the first switch component is turned on when the power supply state is normal, and is turned off when the power supply state is abnormal;

[0029] The second circuit comprises a second switch component and a second resistor connected in series between the first switch component and the output terminal of the power supply device, wherein the second switch component is turned off when the first switch component is turned on, and is turned on when the first switch component is turned off;

[0030] The resistance value of the first resistor is greater than the resistance value of the second resistor.

[0031] An electronic device, comprising a power supply device;

[0032] The power supply device includes a control chip, a discharge circuit and an energy storage module;

[0033] The control chip can be used to control the discharge circuit to discharge the residual pressure in the energy storage module when the power supply state of the power supply device is abnormal. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0035] Figure 1 It is a schematic diagram of a composition structure of a power supply device provided by the present application;

[0036] Figure 2 It is an exemplary implementation circuit of the power supply device structure provided by the present application;

[0037] Figure 3 It is a flow chart of a control method of a power supply device provided by the present application;

[0038] Figure 4 is another flow chart of the control method of the power supply device provided by the present application;

[0039] Figure 5 It is another flow chart of the control method of the power supply device provided by the present application;

[0040] Figure 6 It is a schematic diagram of the composition structure of the control circuit provided by the present application;

[0041] Figure 7 It is an exemplary implementation structure of the discharge circuit provided in this application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] The embodiments of the present application provide a control method, a control circuit and an electronic device for a power supply device. The provided method can be applied to electronic devices in many general or special computing device environments or configurations, such as personal computers, server computers, multi-processor devices, etc.

[0044] The following first describes the power supply device targeted by the method of the present application and the problems existing in the protection situation when the power supply status of the power supply device is abnormal.

[0045] The power supply device is specifically a power supply device of an electronic device, and is used to supply power to the electronic device.

[0046] The power supply device may be an internal component of the electronic device, integrated inside the electronic device, or may be an external device of the electronic device, independent of the electronic device, and is not limited to this, and may be determined according to actual application conditions. For example, the power supply device is specifically a power module integrated in a desktop (DT), or a power adapter of a laptop (independent of the laptop), etc.

[0047] See also Figure 1 , shows an optional composition structure of the power supply device targeted by the method of the present application, including:

[0048] An input interface 10, used for inputting electric energy;

[0049] The power supply module 20 is connected to the input interface 10 and is used to output power based on the power input by the input interface 10 to supply power to the system of the electronic device;

[0050] The energy storage module 30 is connected to the output end of the power supply module 20 and is used to store electric energy;

[0051] The protection module 40 is connected to the power supply module 20 and is used to shut down the power output of the power supply module 20 when the power supply state of the power supply device is abnormal.

[0052] Optionally, the input interface 10 may be an AC (Alternating Current) input interface, see Figure 2 Provided Figure 1 An exemplary implementation circuit of the power supply device composition structure, wherein the input interface 10 is specifically an AC input interface, represented as Figure 2 The AC input is used to input alternating current, such as 220V alternating current.

[0053] The power supply module 20 includes a power conversion module and a step-down rectifier module, wherein the power conversion module is connected to the input interface 10 and is used to convert the alternating current input by the input interface 10 into direct current; the step-down rectifier module is connected to the power conversion module and is used to step down and rectify the direct current output by the power conversion module to obtain stepped-down rectified direct current.

[0054] Optionally, the power conversion module may be a PFC (Power Factor Correction) rectifier module. Figure 2 It is represented as PFC in the figure, which is specifically used to rectify AC power into DC power and also has a boost function. For example, it can rectify and boost 220V AC power to output 400V DC power. The buck rectifier module can include a transformer and a rectifier. Figure 2 It is represented as D2D in Figure 2 The Transformer and Rectifier in the figure, where the Transformer is used for step-down and isolation, for example, stepping down 400V DC and isolating the output, and the Rectifier is used to rectify the DC output of the transformer (DC to DC) and output the DC power required by the load of the electronic device, such as outputting 12V DC.

[0055] The energy storage module 30 may include a capacitor.

[0056] Optionally, the power supply device may further include an electromagnetic compatibility module connected to the input interface 10 and the power conversion module, for eliminating electromagnetic interference in the alternating current. Figure 2 It is represented by EMI (Electro Magnetic Interference), which can be specifically set between the 220V AC power input interface and the PFC, and connected to the 220V AC power input interface and the PFC respectively.

[0057] like Figure 2As shown, the protection module 40 can be, but is not limited to, a logic timing protection chip (Housekeeping IC) inside the power supply device. When the power supply device is working normally, the FPOB (Failure Protection Output) pin of the Housekeeping IC outputs a high level (HIGH). When the power supply state of the power supply device is abnormal, this pin outputs a low level (LOW). The power supply design uses this LOW signal to turn off and latch the 12V power supply line, thereby protecting the power supply device. If the user needs to restart the system of the power supply device and the electronic device (referred to as "power and system"), it is necessary to unplug the input interface, such as unplug the 220V AC interface and then plug it back in to complete the restart of the power supply and system. Therefore, the restart efficiency of the power supply and system is low and time-consuming, and the manual operation of the user is relatively troublesome, which has certain safety hazards.

[0058] The above problem can be improved by changing the restart mode after the 12V power supply line is turned off to the auto-recover mode. Specifically, when the power supply status of the power supply equipment is abnormal, the Housekeeping IC will turn off the 12V power supply line. Since the energy storage module is connected to the power supply line, there is still residual voltage, and its voltage value will decrease accordingly. When the voltage drops from 12V to 3V, the Housekeeping IC will be turned off (OFF) due to undervoltage and cannot work normally, resulting in the Housekeeping IC being unable to keep the 12V power supply line locked. At this time, the 12V power supply line will be released, and the power supply and system will restart.

[0059] This method realizes the automatic restart of the power supply and system when the power supply device is protected, without manual operation by the user. However, it still cannot solve the problem of low restart efficiency and long time consumption. The reason is that after the 12V power supply line is turned off, when the residual voltage of the circuit drops from 12V to 9V, the mainboard circuit of the electronic equipment system will enter the off state (OFF) due to under-voltage protection (UVP), and it becomes a no-load (i.e. no load) mode for the power supply device. In the no-load mode, only the power supply device's own load (small load) discharges the residual voltage, which causes the voltage to drop from 9V to 3V for a long time. Generally, the greater the power of the power supply device and the higher the system configuration, the greater the capacitance of the power supply device and the mainboard of the electronic equipment, and the longer the discharge time will be, which may be as long as tens of seconds. This will result in a long time from the occurrence of abnormal power supply status to restart, and low restart efficiency.

[0060] The present application scheme is used to solve the above-mentioned technical problems so as to realize automatic restart of the power supply and the system quickly and efficiently when the power supply status of the power supply device is abnormal and a protection condition occurs.

[0061] See also Figure 3 As shown in the method flow chart, the control method of the power supply device provided in the embodiment of the present application may at least include the following steps 301 to 302, and these steps are described in detail below.

[0062] Step 301: monitor the power supply status of a power supply device supplying power to a load device.

[0063] In the embodiments of the present application, the load device mainly refers to the system load of the electronic device, such as the load on the mainboard circuit of the electronic device.

[0064] Optionally, the power supply status of the power supply device to the load device can be monitored through a protection module of the power supply device, such as a logic timing protection chip Housekeeping IC, so as to determine whether the power supply status of the power supply device to the load device is abnormal through power supply status monitoring.

[0065] Step 302: When the power supply state is abnormal, control a discharge circuit provided in the power supply device to discharge residual pressure in the power supply device.

[0066] The power supply status of the power supply device is abnormal, including but not limited to the abnormal power supply status caused by any one or more of the following reasons:

[0067] 11) The power supply device itself is abnormal

[0068] For example, the power feedback resistor is open or short-circuited.

[0069] 12) Load equipment abnormality

[0070] This includes but is not limited to electronic equipment where the system load has an abnormally high current.

[0071] 13) Abnormality occurs between the power supply device and the load device

[0072] Including but not limited to short circuits at the connection between the power supply device and the system load.

[0073] If the power supply status of the power supply device is abnormal, the protection module of the power supply device can be used to shut down the power output of the power supply module of the power supply device to protect the power supply device and the load device. For example, when the power supply status of the power supply device is abnormal, the Housekeeping IC controls its FPOB pin to output a low level, and the 12V power supply line of the power supply device is turned off through the low level signal, thereby protecting the power supply device.

[0074] In the case of abnormal power supply status of the power supply device and power protection, in order to achieve rapid automatic restart of the power supply and the system, the embodiment of the present application also adds a discharge circuit in the power supply device to discharge the residual pressure in the power supply device. The residual pressure in the power supply device specifically includes the residual pressure in the energy storage module and the circuit in the power supply device.

[0075] Based on this, when the power supply status of the power supply device is abnormal, the embodiment of the present application also controls the discharge circuit set in the power supply device to discharge the residual voltage in the power supply device, and discharges the residual voltage in the power supply device with the help of the discharge circuit to accelerate the voltage drop process of the residual voltage in the power supply device.

[0076] The embodiment of the present application adds a discharge circuit in the power supply device, and when the power supply state of the power supply device is abnormal, the residual voltage in the power supply device is discharged by controlling the discharge circuit, thereby accelerating the voltage drop process of the residual voltage in the power supply device, and can make the protection modules such as the Housekeeping IC in the power supply device quickly under-voltage and shut down (OFF), so as to prompt the power supply and the system to restart quickly and automatically, thereby realizing automatic restart of the power supply and the system in a self-recovery manner, and can also improve the restart efficiency and reduce the time consumption.

[0077] In an alternative embodiment, see Figure 4 As shown in the flow chart of the control method of the power supply device, step 302 in the method provided by the present application can be implemented as follows:

[0078] Step 401: Control the discharge circuit to reduce the voltage of the power supply device from a target voltage to a first voltage, where the first voltage is used to enable the power supply device to obtain a restart signal.

[0079] The first voltage is a voltage that can be used to enable the power supply device to obtain a restart signal. When the power supply device is at the first voltage, the protection modules such as the Housekeeping IC in the power supply device can be shut down due to undervoltage, which correspondingly causes the protection module to be unable to maintain the shutdown control state of the power supply module of the power supply device, thereby enabling the power supply device to obtain the voltage of the restart signal. Figure 2 In the example, the first voltage is 3V.

[0080] The first voltage may be determined by, but is not limited to, one of the following methods: manually set; set according to specification attributes of components in the power supply device (such as Housekeeping IC).

[0081] The target voltage is higher than the first voltage.

[0082] When the power supply status of the power supply device is abnormal, this embodiment controls the discharge circuit to reduce the voltage of the power supply device from the target voltage to the first voltage to accelerate the undervoltage process of protection modules such as the Housekeeping IC, so that the protection module can quickly release the shutdown control of the power supply module of the power supply device, and accordingly enable the power supply device to quickly obtain a restart signal.

[0083] The process of controlling the discharge circuit to reduce the voltage of the power supply device from the target voltage to the first voltage can be further implemented as one of the following 21) and 22):

[0084] 21) In response to detecting that the power supply state of the power supply device is abnormal, triggering the discharge circuit to reduce the voltage of the power supply device from the second voltage to the first voltage.

[0085] In this embodiment 12), the target voltage is the second voltage.

[0086] The second voltage is the working voltage when the power supply state is normal, and may also refer to the voltage corresponding to the residual voltage in the power supply device when its power supply module is turned off (to protect the power supply device) when the power supply state of the power supply device is abnormal.

[0087] against Figure 2 In the example of , the second voltage is 12V.

[0088] In response to detecting that the power supply state of the power supply device is abnormal, this embodiment triggers the discharge circuit to reduce the voltage of the power supply device from the second voltage to the first voltage. Exemplarily, the discharge circuit is triggered to reduce the voltage of the residual voltage in the power supply device from 12V to 3V.

[0089] Among them, in the process that the discharge circuit reduces the voltage of the power supply device from the second voltage to the first voltage, the load device will also discharge the residual voltage in the power supply device at the same time. For example, the load on the mainboard circuit of the electronic device discharges the residual voltage on the energy storage capacitor of the power supply device, etc., until the voltage of the power supply device is reduced from the second voltage to the low voltage protection value of the mainboard circuit, such as 9V, the mainboard circuit enters the closed state (OFF) and stops discharging the residual voltage. During the entire discharge process, the discharge circuit continues to discharge the residual voltage in the power supply device until the voltage of the power supply device is reduced to the first voltage.

[0090] 22) In response to detecting that the power supply state of the power supply device is abnormal, the voltage of the power supply device is reduced from the second voltage to a third voltage through the load device, and the discharge circuit is triggered to reduce the voltage of the power supply device from the third voltage to the first voltage.

[0091] Optionally, the third voltage is a voltage value that triggers the motherboard line load in the load device to perform low voltage protection. Figure 2For example, the third voltage may be 9V.

[0092] The third voltage may be determined by, but is not limited to, one of the following methods: manually set; set according to the specification attributes of the components in the power supply device (such as the Housekeeping IC); set according to the voltage at which the load device cannot discharge.

[0093] In this embodiment 22), the target voltage is the third voltage.

[0094] In response to detecting that the power supply state of the power supply device is abnormal, this embodiment 22) first discharges the residual voltage in the power supply device through the load device until the load device reduces the voltage of the power supply device from the second voltage to the third voltage, and the load device enters a shutdown state due to under-voltage protection (UVP), thereby stopping the discharge of the residual voltage in the power supply device. For example, the residual voltage in the energy storage module of the power supply device is discharged through the load on the motherboard circuit of the electronic device system, and the residual voltage in the energy storage module of the power supply device is reduced from 12V to 9V. At this time, the motherboard circuit of the electronic device system will enter a shutdown state due to low voltage protection, and the power supply device will become a no-load mode.

[0095] In view of this situation, in order to prevent the power supply device from becoming a no-load mode (only the power supply device's own load discharges the residual voltage) after the load device is turned off, so that the residual voltage in the energy storage module of the power supply device can still be quickly discharged, in this embodiment 22), when the load device reduces the voltage of the power supply device from the second voltage to the third voltage, the discharge circuit is triggered to continue to reduce the voltage of the power supply device from the third voltage to the first voltage. For example, when the mainboard circuit of the electronic device system reduces the residual voltage in the energy storage module of the power supply device from 12V to 9V, and enters the shutdown state due to low voltage protection, the discharge circuit is triggered to continue to reduce the residual voltage in the energy storage module of the power supply device from 9V to 3V.

[0096] When the discharge circuit is not provided in the power supply device, the circuit between the output terminal of the power supply device and the control chip of the power supply device reduces the voltage of the power supply device from the target voltage to the first voltage for a first time period. Optionally, the control chip of the power supply device may refer to a logic timing protection chip of the power supply device, i.e., a Housekeeping IC, and the circuit between the output terminal of the power supply device and the control chip of the power supply device may include a load line of the power supply device's own load, wherein the load of the power supply device itself may be a resistor in the circuit of the power supply device.

[0097] In the case where a bleeding circuit is provided in the power supply device, the bleeding circuit reduces the voltage of the power supply device from the target voltage to the first voltage for a second time period.

[0098] Among them, the first time length is greater than the second time length, that is, the present application accelerates the discharge process by adding a discharge circuit in the power supply device and discharging the residual pressure in the power supply device with the help of the discharge circuit, thereby achieving the effect of reducing the time required for residual pressure discharge.

[0099] In the present embodiment, whether it is implementation mode 21) or implementation mode 22), the residual pressure in the power supply device can be quickly discharged based on the set discharge circuit, thereby avoiding no-load during the residual pressure discharge process and accelerating the discharge process. The protection modules such as the Housekeeping IC in the power supply device can be quickly under-voltage and shut down (OFF), which can prompt the power supply and the system to restart automatically and quickly, thereby realizing the automatic restart of the power supply and the system while improving the restart efficiency of the power supply and the system and reducing the time consumption.

[0100] In an alternative embodiment, see Figure 5 The control method flow chart of the power supply device shown in the figure, the method provided by the present application may further include the following processing after step 302:

[0101] Step 303: In response to the power supply device obtaining a restart signal, the control chip of the power supply device controls the power supply device to restart and controls the discharge circuit to be disconnected.

[0102] As mentioned above, the control chip of the power supply device can be a logic timing protection chip of the power supply device, that is, a Housekeeping IC. In the case where both the control chip and the protection module are logic timing protection chips of the power supply device, the logic timing protection chip simultaneously realizes the functions required by the control chip and the protection module.

[0103] When the discharge circuit is controlled to reduce the voltage of the power supply device from the target voltage to the first voltage, the power supply device may obtain a restart signal based on the first voltage, and in response to the power supply device obtaining the restart signal, the control chip of the power supply device controls the power supply device to restart and controls the discharge circuit to disconnect. For example, in response to the power supply device obtaining the restart signal, the Housekeeping IC may control the power supply device to restart based on the pin signal of its corresponding pin, and control the discharge circuit to disconnect based on the pin signal of its corresponding pin.

[0104] The control chip controls the discharge circuit to be disconnected, which can be implemented as one of the following:

[0105] 31) In response to the voltage of the control chip dropping to the first voltage, the control chip sends a first signal to the discharge circuit, and the discharge circuit is disconnected.

[0106] For example, in response to the voltage of the Housekeeping IC dropping to 3V, the Housekeeping IC controls its preset pin to send a high-level signal to the discharge circuit, and controls the discharge circuit to be disconnected based on the high-level signal to stop the discharge circuit from discharging the voltage of the power supply device.

[0107] 32) In response to the control chip switching from the working state to the non-working state, the control chip sends a second signal to the discharge circuit, and the discharge circuit is disconnected.

[0108] In this implementation, when the control chip switches from the working state to the non-working state, a second signal is sent to the discharge circuit, and the discharge circuit is controlled to be disconnected based on the second signal. For example, in response to the Housekeeping IC switching from the working state to the non-working state, the Housekeeping IC controls its preset pin to send a high-level signal to the discharge circuit, and controls the discharge circuit to be disconnected based on the high-level signal to stop the discharge circuit from discharging the voltage of the power supply device.

[0109] 33) In response to the power supply device being restarted, the control chip sends a third signal to the discharge circuit, and the discharge circuit is disconnected.

[0110] In this implementation, the control chip can send a third signal to the discharge circuit after the power supply device is restarted to disconnect the discharge circuit. It can be understood that the power supply device will experience a process of power-on-off-on when it is restarted. The control chip responds to the restart of the power supply device in multiple situations. One situation is that the power supply device is powered off when it is restarted. At this time, the control chip will also be powered off with the power supply device. After the power supply device is restarted and powered on again, the control chip is powered on again. At this time, the control chip can send a third signal to the discharge circuit to control the discharge circuit to disconnect, so as to avoid the discharge circuit from discharging when the power supply device is in normal working state. Another situation is that the power supply device is powered off when it is restarted, but the control chip can still send a signal at this time. Then, when the control chip detects that the power supply device is restarting, it sends a third signal to the discharge circuit to stop the discharge circuit from discharging the voltage of the power supply device.

[0111] This embodiment controls the restart of the power supply device in response to a restart signal obtained by the power supply device based on the residual pressure discharge of the discharge circuit, thereby realizing a fast and automatic restart of the power supply and the system, and avoids the power consumption of the power supply device by the discharge circuit after the power supply device restarts by controlling the discharge circuit to disconnect.

[0112] In an optional embodiment, the power supply device further includes a monitoring module, which can monitor the circuit status in the power supply device. When the working state of the power supply device is abnormal, the monitoring module can monitor the voltage of the power supply device, and when it is detected that the voltage of the power supply device drops to the first voltage, a fourth signal can be sent to the discharge circuit to make the discharge circuit stop discharging the voltage of the voltage device.

[0113] See also Figure 6 , shows the composition structure of the control circuit provided in the present application, and the control circuit is applied to the power supply device and includes a control chip 61 and a discharge circuit 62.

[0114] The control chip is used to control the discharge circuit to discharge the residual pressure in the power supply device when the power supply state of the power supply device is abnormal.

[0115] Optionally, the control chip may specifically be a logic timing protection chip of a power supply device, namely, a Housekeeping IC.

[0116] In addition to the control chip and the discharge circuit, the power supply device may also include Figure 1 The input interface, power supply module, energy storage module, protection module and other components shown in the figure, the connection relationship between these components and the functions of each component can be found in the relevant description in the previous text, and will not be repeated here.

[0117] In which, when the control chip and the protection module are both logic timing protection chips of the power supply device, the logic timing protection chip simultaneously realizes the functions required by the control chip and the protection module.

[0118] Optionally, a control chip such as a Housekeeping IC can monitor the power supply status of the power supply device to the load device, and when the power supply status is abnormal, control the discharge circuit provided in the power supply device to discharge the residual pressure in the power supply device.

[0119] Specifically, when the power supply status of the power supply device is abnormal, the Housekeeping IC controls its FPOB pin to output a low level, and turns off the 12V power supply line of the power supply device through the low level signal, thereby protecting the power supply device and controlling the discharge circuit to discharge the residual pressure in the energy storage module of the power supply device.

[0120] In an optional implementation, the discharge circuit includes a first circuit and a second circuit.

[0121] When the power supply state of the power supply device is normal, the first circuit is turned on and the second circuit is turned off. When the power supply state of the power supply device is abnormal, the first circuit is turned off and the second circuit is turned on.

[0122] Furthermore, the first circuit includes a first resistor and a first switch component connected in series between the control chip and the output end of the power supply device. The first switch component is turned on when the power supply state of the power supply device is normal, and is turned off when the power supply state of the power supply device is abnormal.

[0123] The second circuit includes a second switch component and a second resistor connected in series between the first switch component and the output terminal of the power supply device. The second switch component is turned off when the first switch component is turned on, and is turned on when the first switch component is turned off.

[0124] The resistance value of the first resistor is greater than the resistance value of the second resistor.

[0125] Optionally, the first switch component and the second switch component may be transistors, such as NPN transistors.

[0126] See also Figure 7 , provides an exemplary implementation structure of the discharge circuit under this embodiment. Among them, the first switch component and the first resistor are respectively Figure 7 The transistor Q1 and the resistor R1 in the circuit form a first circuit of the discharge circuit, and the second switch component and the second resistor are respectively Figure 7 The transistor Q2 and the resistor R2 in the circuit form the second circuit of the discharge circuit. The transistor Q1 and the resistor R1 are connected in series between the control chip Housekeeping IC and the output end of the power supply device, the base of Q1 is connected to the FPOB pin of the Housekeeping IC, the emitter is grounded, and the collector is connected to R1; the transistor Q2 and the resistor R2 are connected in series between the transistor Q1 and the output end of the power supply device, and the base of Q2 is connected to the collector of Q1, the emitter is grounded, and the collector is connected to R2.

[0127] Among them, the resistance value of R1 is greater than the resistance value of R2.

[0128] In this example, when the power supply device is in normal state, the FPOB pin of the Housekeeping IC outputs a high-level signal, Q1 is turned on, and Q2 is turned off. At this time, the current in the discharge circuit is very small, and the impact on the power supply efficiency can be ignored. Figure 7 Take the resistance parameters in as an example. In this case, I1=12V / 50kohm=0.24mA, I2=0, R2 is not connected, 0.24mA is very small, and the impact on power efficiency can be ignored.

[0129] When the power supply status of the power supply device is abnormal, the FPOB pin outputs a low-level signal, and the 12V power supply line of the power supply device is turned off based on the signal, thereby protecting the power supply device. At the same time, the signal is reused to control the discharge circuit, where specifically based on the low-level signal, Q1 is turned off and Q2 is turned on. At this time, R2 is connected and a large current flows through R2, so that the residual pressure of the power supply device can be quickly discharged to Figure 7Taking the resistor parameters in as an example, the current I1 on R1 = 0.24mA, and the current I2 on R2 = 12V / 300ohm = 40mA. The maximum power consumption on R2 is 12V*12V / 300ohm = 0.48W, which means that selecting a resistor with a smaller resistance value can achieve the effect of quickly discharging the residual voltage in the power supply device.

[0130] Among them, the smaller the resistance of R2, the greater the current.

[0131] Taking a 750W power supply as an example, after the power supply is protected, the discharge time of the 12V residual voltage for the connected 40mA load R2 will be shortened from 20s without the discharge circuit to about 3s. That is to say, after the power supply is protected, due to the connection of the discharge circuit, the power supply restarts automatically in 3s instead of the original 20s, thereby improving the restart efficiency, reducing the time consumption, and greatly improving the user experience.

[0132] In practical applications, the appropriate resistance value for R2 can be selected based on demand and in combination with cost, heat generation and other factors. Moreover, R1, R2, Q1 and Q2 can all be low-power components with lower costs.

[0133] In another optional implementation, the discharge circuit includes a third circuit.

[0134] The third circuit includes a third switch.

[0135] When the power supply device is in a normal state, the third switch is turned off and the third circuit is disconnected to avoid the third circuit from wasting power on the power supply device. When the power supply device is in an abnormal state, the third switch is turned on and the third circuit is grounded, and the residual pressure in the power supply device is discharged through the third circuit to accelerate the discharge process of the residual pressure in the power supply device and realize a rapid restart of the power supply device.

[0136] Furthermore, the third circuit also includes a third resistor connected in series with the third switch. When the power supply device is powered normally, the third switch is turned off. When the power supply state of the power supply device is abnormal, the third switch is turned on, and current flows through the third resistor at this time, which can discharge the residual pressure in the power supply device, thereby accelerating the speed at which the power supply device is reduced from the target voltage to the first voltage, and realizing a rapid restart of the power supply device.

[0137] The control circuit of the embodiment of the present application accelerates the voltage drop process of the residual voltage in the power supply device by adding a discharge circuit in the power supply device and discharging the residual voltage in the power supply device by controlling the discharge circuit when the power supply status of the power supply device is abnormal, so that the protection modules such as the Housekeeping IC in the power supply device can be quickly under-voltage and shut down (OFF), prompting the power supply and the system to restart quickly and automatically. While realizing the automatic restart of the power supply and the system, it also improves the restart efficiency and reduces the time consumption.

[0138] An embodiment of the present application also provides an electronic device, which includes a power supply device, and the power supply device further includes a control chip, a discharge circuit and an energy storage module.

[0139] The control chip can be used to control the discharge circuit to discharge the residual pressure in the energy storage module when the power supply state of the power supply device is abnormal.

[0140] For a more detailed description of the components of the power supply device and its working process, please refer to the description of the previous embodiment, which will not be repeated here.

[0141] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0142] For the convenience of description, the above system or device is described by dividing it into various modules or units according to its functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0143] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or the part that makes a creative contribution can be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application or some parts of the embodiments.

[0144] Finally, it should be noted that, in this article, relational terms such as first, second, third and fourth are used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0145] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling a power supply device, comprising: Monitor the power supply status of the power supply equipment to the load equipment; When the power supply state is abnormal, a discharge circuit provided in the power supply device is controlled to discharge the residual pressure in the power supply device.

2. The control method of the power supply device according to claim 1, wherein the step of controlling a discharge circuit provided in the power supply device to discharge residual pressure in the power supply device comprises: The discharge circuit is controlled to reduce the voltage of the power supply device from a target voltage to a first voltage, where the first voltage is used to enable the power supply device to obtain a restart signal.

3. The control method of the power supply device according to claim 2, wherein the controlling the discharge circuit to reduce the voltage of the power supply device from the target voltage to the first voltage comprises at least one of the following: In response to detecting that the power supply state is abnormal, triggering the discharge circuit to reduce the voltage of the power supply device from a second voltage to the first voltage, where the second voltage is a working voltage when the power supply state is normal; In response to detecting that the power supply state is abnormal, the voltage of the power supply device is reduced from the second voltage to a third voltage through the load device, and the discharge circuit is triggered to reduce the voltage of the power supply device from the third voltage to the first voltage.

4. The control method of the power supply device according to claim 2, wherein: The circuit between the output terminal of the power supply device and the control chip of the power supply device reduces the voltage of the power supply device from the target voltage to the first voltage for a first time period; The bleeder circuit reduces the voltage of the power supply device from the target voltage to the first voltage for a second time period; The first duration is greater than the second duration.

5. The control method of the power supply device according to claim 4, further comprising: In response to the power supply device obtaining the restart signal, the control chip controls the power supply device to restart, and the control chip controls the discharge circuit to be disconnected.

6. The control method of the power supply device according to claim 5, wherein the control chip controls the discharge circuit to be disconnected, comprising at least one of the following: In response to the voltage of the control chip dropping to the first voltage, the control chip sends a first signal to the discharge circuit, and the discharge circuit is disconnected; In response to the control chip switching from the working state to the non-working state, the control chip sends a second signal to the discharge circuit, and the discharge circuit is disconnected; In response to the power supply device being restarted, the control chip sends a third signal to the discharge circuit, and the discharge circuit is disconnected.

7. A control circuit, applied to a power supply device, comprising: Control chip and discharge circuit; The control chip is used to control the discharge circuit to discharge the residual pressure in the power supply device when the power supply state of the power supply device is abnormal.

8. The control circuit according to claim 7, wherein the discharge circuit comprises a first circuit and a second circuit; When the power supply state is normal, the first circuit is turned on and the second circuit is turned off; when the power supply state is abnormal, the first circuit is turned off and the second circuit is turned on to discharge the residual pressure in the power supply device; or, The discharge circuit further includes a third circuit; The third circuit includes a third switch; when the power supply state is normal, the third switch is turned off and the third circuit is disconnected; when the power supply state is abnormal, the third switch is turned on and the third circuit is grounded.

9. The control circuit according to claim 8, wherein the first circuit comprises a first resistor and a first switch component connected in series between the control chip and the output terminal of the power supply device, wherein the first switch component is turned on when the power supply state is normal, and is turned off when the power supply state is abnormal; The second circuit comprises a second switch component and a second resistor connected in series between the first switch component and the output terminal of the power supply device, wherein the second switch component is turned off when the first switch component is turned on, and is turned on when the first switch component is turned off; The resistance value of the first resistor is greater than the resistance value of the second resistor.

10. An electronic device comprising a power supply device; The power supply device includes a control chip, a discharge circuit and an energy storage module; in, The control chip can be used to control the discharge circuit to discharge the residual pressure in the energy storage module when the power supply state of the power supply device is abnormal.

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