Power supply discharging circuit and power supply equipment
By introducing the coordination of the switch module, control module and detection module into the circuit, the detection module controls the discharge module to turn on when the switch module is closed, solving the problem of load power storage after the power is turned off and achieving rapid discharge and stability of the load.
Patent Information
- Application Number
- CN202410449809.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-10-21
AI Technical Summary
In existing circuit designs, the load is prone to accumulate electricity after the power is turned off, resulting in unstable operation.
A combination of a switch module, a control module, a detection module and a discharge module is adopted. The control module controls the on and off of the switch module, and the detection module controls the discharge module to turn on when the switch module is closed, thereby realizing rapid discharge of the load.
This achieves rapid discharge of the load after the power is turned off, avoiding unstable conditions caused by load power accumulation.
Smart Images
Figure CN120825035A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the technical field of discharge circuits, and in particular to a power supply discharge circuit and a power supply device. Background Art
[0002] In current circuit designs, a power supply supplies power to a load. When the power is turned off, the load is prone to accumulate electricity, which may cause the load to operate in an unstable state. Summary of the Invention
[0003] In order to overcome the problems existing in the related art, the present application provides a power supply discharge circuit and a power supply device, which can enable the load to discharge quickly after the power is turned off.
[0004] According to a first aspect of an embodiment of the present application, there is provided a power supply discharging circuit, comprising a switch module, a control module, a detection module and a discharging module;
[0005] The output end of the control module is connected to the driving end of the switch module, the power input end of the switch module is connected to a DC power supply, and the output end of the switch module is connected to a load;
[0006] The output end of the control module is also connected to the input end of the detection module, the output end of the detection module is connected to the input end of the discharge module, and the output end of the discharge module is connected to the load. The detection module is used to control the discharge module to turn on when the switch module is closed to discharge the load.
[0007] According to a second aspect of an embodiment of the present application, a power supply device is provided, comprising the power supply discharge circuit described above, configured to be connected to a load to supply power to the load.
[0008] In this embodiment of the present application, a switch module, a control module, a detection module, and a discharge module work together. The control module controls the switch module to conduct, thereby supplying power to the load. The control module controls the switch module to shut down. Upon detecting that the switch module is shut down, the detection module controls the discharge module to turn on, thereby rapidly discharging the load. Furthermore, the input of the detection module and the driving end of the switch module are both connected to the output of the control module, thereby reducing the number of output terminals of the control module.
[0009] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.
[0010] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1This is a schematic diagram of the structure of a power supply discharge circuit according to one embodiment of the present application;
[0012] Figure 2 This is a schematic diagram of a specific circuit structure of a switch module in a power supply discharge circuit according to an embodiment of the present application;
[0013] Figure 3 This is a schematic diagram of a specific circuit structure of a switch module in a power supply discharge circuit according to another embodiment of the present application;
[0014] Figure 4 This is a schematic diagram of the specific circuit structure of the detection module and the discharge module in the power supply discharge circuit shown in one embodiment of the present application;
[0015] Figure 5 This is a schematic diagram of the structure of a power supply device shown in one embodiment of the present application. DETAILED DESCRIPTION
[0016] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
[0017] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0018] When the following description refers to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements.
[0019] In the description of this application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The singular forms "a", "said", and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. The words "if" / "if" used herein can be interpreted as "at the time of" or "when" or "in response to determination". In addition, in the description of this application, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.
[0020] See also Figure 1 , which is a schematic diagram of the structure of the power supply discharge circuit shown in an embodiment of the present application. The power supply discharge circuit of the embodiment of the present application includes a switch module 10, a control module 20, a detection module 30 and a discharge module 40;
[0021] The output end of the control module 20 is connected to the driving end of the switch module 10, the power input end of the switch module 10 is connected to a DC power supply, and the output end of the switch module 10 is connected to a load;
[0022] The output end of the control module 20 is also connected to the input end of the detection module 30, the output end of the detection module 30 is connected to the input end of the discharge module 40, and the output end of the discharge module 40 is connected to the load. The detection module 30 is used to control the discharge module 40 to turn on when the switch module 10 is closed, so as to discharge the load.
[0023] The control module 20 outputs a control signal to control the switch module 10 to be turned on or off, and the detection module 30 to output different signal states. The discharge module 40 receives the signal output by the detection module 30 and discharges or does not discharge the load.
[0024] The load includes but is not limited to a capacitive load.
[0025] Specifically, the control signal includes a high-level signal and a low-level signal. When the control signal is a high-level signal, the switch module 10 is turned on, the power supply supplies power to the load, the detection module 30 receives the high-level signal and outputs a low-level signal, and the discharge module 40 receives the low-level signal and does not discharge the load.
[0026] When the control signal is a low level signal, the switch module 10 is closed, the power supply stops supplying power to the load, the detection module 30 receives the low level signal and outputs a high level signal, and the discharge module 40 receives the high level signal and discharges the load.
[0027] In the embodiment of the present application, the control module 20 can be a power transmission chip, such as the GVS2001 chip. The detection circuit is a NOR gate circuit, which can be implemented using discrete components or an integrated NOR gate chip. The switch module 10 includes, but is not limited to, switch devices and switch chips. The discharge module 40 includes switch devices and a discharge resistor. The switch devices include, but are not limited to, MOS transistors and triodes.
[0028] In the embodiments of the present application, the switch module 10, control module 20, detection module 30, and discharge module 40 work together to control the switch module 10 to conduct, thereby supplying power to the load. The control module 20 controls the switch module 10 to shut down. Upon detecting that the switch module 10 is shut down, the detection module 30 controls the discharge module 40 to turn on, thereby rapidly discharging the load. Furthermore, the input of the detection module 30 and the drive end of the switch module 10 are both connected to the output of the control module 20, thereby reducing the number of outputs of the control module 20.
[0029] In one embodiment, see Figure 2 , the switch module 10 includes a filter unit 100, a first switch unit 110 and a second switch unit 120;
[0030] The input end of the filter unit 100 is the driving end of the switch module 10 , and the output end of the filter unit 100 is connected to the first input end of the first switch unit 110 ;
[0031] The second input end of the first switch unit 110 is the power input end of the switch module 10 , and the output end of the first switch unit 110 is connected to the first input end of the second switch unit 120 ;
[0032] The second input end of the second switch unit 120 is connected to the first input end of the first switch unit 110 , and the output end of the second switch unit 120 is the output end of the switch module 10 .
[0033] The input end of the filter unit 100 is the driving end of the switch module 10 and is connected to the output end of the control module 20 , so as to filter out noise in the control signal and improve the quality of the control signal.
[0034] The second input terminal of the first switch unit 110 is the power input terminal of the switch module 10 and is connected to the DC power supply. The first switch unit 110 includes but is not limited to switch devices and switch chips. Specifically, the switch devices include but are not limited to MOS tubes and transistors.
[0035] The output end of the second switch unit 120 is the output end of the switch module 10 and is connected to the load. The second switch unit 120 includes but is not limited to switch devices and switch chips. Specifically, the switch devices include but are not limited to MOS tubes and transistors.
[0036] In the embodiment of the present application, when the first input terminal of the first switch unit 110 receives a high-level signal, the first switch unit 110 is turned on. When the second input terminal of the second switch unit 120 receives a high-level signal, the second switch unit 120 is turned on, and the power supply supplies power to the load. When the first input terminal of the first switch unit 110 receives a low-level signal, the first switch unit 110 is turned off, and the power supply does not supply power to the load.
[0037] Through the cooperation of the filter unit 100 , the first switch unit 110 and the second switch unit 120 , the switch module 10 can be turned on and off.
[0038] In one embodiment, see Figure 2 The filtering unit 100 includes a fifth resistor RU38 and a first capacitor C13; the first switch unit 110 includes a switch chip UU5, a sixth resistor RU23, a second capacitor CU35, and a third capacitor CU36; the second switch unit 120 includes a third MOS transistor QD4, a fourth MOS transistor QD5, a seventh resistor R41, an eighth resistor R46, a ninth resistor R40, a fourth capacitor C11, and a fifth capacitor CU6;
[0039] A first end of the fifth resistor RU38 is connected to the output end of the control module 20, a second end of the fifth resistor RU38 is connected to the first pin of the switch chip UU5, one end of the first capacitor C13 is connected to the second end of the fifth resistor RU38, and the other end of the first capacitor C13 is grounded;
[0040] The second pin of the switch chip UU5 is the power input terminal of the switch module 10, the third pin of the switch chip UU5 is connected to the drain of the third MOS transistor QD4, and the fourth pin of the switch chip UU5 is grounded via the sixth resistor RU23;
[0041] One end of the second capacitor CU35 is connected to the second pin of the switch chip UU5, and the other end of the second capacitor CU35 is grounded;
[0042] One end of the third capacitor CU36 is connected to the third pin of the switch chip UU5, and the other end of the third capacitor CU36 is grounded;
[0043] The source of the third MOS transistor QD4 is the output terminal of the switch module 10, the gate of the third MOS transistor QD4 is connected to the first end of the seventh resistor R41, and the second end of the seventh resistor R41 is connected to the drain of the fourth MOS transistor QD5;
[0044] The gate of the fourth MOS transistor QD5 is connected to the first pin of the switch chip UU5 via the eighth resistor R46, and the source of the fourth MOS transistor QD5 is grounded;
[0045] A first end of the ninth resistor R40 is connected to the source of the third MOS transistor QD4, and a second end of the ninth resistor R40 is connected to the gate of the third MOS transistor QD4;
[0046] One end of the fourth capacitor C11 is connected to the source of the third MOS transistor QD4, and the other end of the fourth capacitor C11 is connected to the gate of the third MOS transistor QD4;
[0047] One end of the fifth capacitor CU6 is connected to the source of the third MOS transistor QD4 , and the other end of the fifth capacitor CU6 is grounded.
[0048] In this embodiment of the present application, the fifth resistor RU38 and the first capacitor C13 form a low-pass filter to remove noise from the control signal. The sixth resistor RU23 is a current-limiting resistor, and the second and third capacitors CU35 and CU36 are used to filter the DC power supply. The seventh resistor R41, the eighth resistor R46, and the ninth resistor R40 are all current-limiting resistors, and the fourth capacitor C11 and the fifth capacitor CU6 are used to filter the DC power supply.
[0049] When the control module 20 outputs a high-level signal, the first pin of the switch chip UU5 receives the high-level signal, turning on the switch chip UU5, causing the drain of the third MOS transistor QD4 to be at a high level. The gate of the fourth MOS transistor QD5 receives the high-level signal output by the control module 20, turning on the fourth MOS transistor QD5, causing the drain of the fourth MOS transistor QD5 to be at a low level. The gate of the third MOS transistor QD4 is connected to the drain of the fourth MOS transistor QD5 via the seventh resistor R41, causing the gate of the third MOS transistor QD4 to be at a low level, turning on the third MOS transistor QD4, and supplying power to the load.
[0050] When the control module 20 outputs a low-level signal, the first pin of the switch chip UU5 receives the low-level signal, the switch chip UU5 is turned off, and the power supply does not supply power to the load.
[0051] The switch module 10 can be turned on and off by cooperating with the switch chip UU5, the third MOS transistor QD4, the fourth MOS transistor QD5, related resistors, and related capacitors.
[0052] In one embodiment, see Figure 3 , the switch module 10 includes a third switch unit 140 and a fourth switch unit 150;
[0053] The first input end of the third switch unit is the power input end of the switch module 10, the second input end of the third switch unit is connected to the output end of the fourth switch unit, and the output end of the third switch unit is the output end of the switch module 10; the input end of the fourth switch unit is the driving end of the switch module 10.
[0054] The first input terminal of the third switch unit is the power input terminal of the switch module 10 and is connected to the DC power supply. The output terminal of the third switch unit is the output terminal of the switch module 10 and is used to connect to the load. The third switch unit includes but is not limited to switching devices and switch chip UU5. Specifically, the switching devices include but are not limited to MOS transistors and triodes.
[0055] The input end of the fourth switch unit is the driving end of the switch module 10 and is connected to the output end of the control module 20. The second switch unit 120 includes but is not limited to switch devices and switch chip UU5. Specifically, the switch devices include but are not limited to MOS tubes and triodes.
[0056] In the embodiment of the present application, the control module 20 outputs a high-level signal, the input end of the fourth switch unit receives the high-level signal, the fourth switch unit is turned on, and the output end of the fourth switch unit outputs a low-level signal, thereby setting the second input end of the third switch unit to a low level. The first input end of the third switch unit is connected to a DC power supply, and the voltage level of the first input end of the third switch unit is higher than that of the second input end of the third switch unit. The third switch unit is turned on, and the power supply supplies power to the load.
[0057] The control module 20 outputs a low-level signal, the input end of the fourth switch unit receives the low-level signal, the fourth switch unit is turned off, and thus the third switch unit is turned off, and the power supply does not supply power to the load.
[0058] The switching module 10 can be turned on and off by cooperating with the third switching unit and the fourth switching unit.
[0059] In one embodiment, see Figure 3 The third switch unit includes a fifth MOS transistor QD1, a sixth MOS transistor QD2, a tenth resistor R158, an eleventh resistor R153, a twelfth resistor R160, a thirteenth resistor R15, a fourteenth resistor R157, a fifteenth resistor R10, a sixteenth resistor R12 and a sixth capacitor C102;
[0060] The fourth switch unit includes a seventh MOS transistor QD3, a seventeenth resistor R16 and an eighteenth resistor R82;
[0061] The drain of the fifth MOS transistor QD1 is the power input terminal of the switch module 10. The source of the fifth MOS transistor QD1 is connected to the source of the sixth MOS transistor QD2. The gate of the fifth MOS transistor QD1 is connected to the first end of the tenth resistor R158. The second end of the tenth resistor R158 is connected to the drain of the seventh MOS transistor QD3 via the eleventh resistor R153.
[0062] The gate of the sixth MOS transistor QD2 is connected to the first end of the twelfth resistor R160. The second end of the twelfth resistor R160 is connected to the drain of the seventh MOS transistor QD3 via the thirteenth resistor R15. The drain of the sixth MOS transistor QD2 is the output end of the switch module 10.
[0063] One end of the sixth capacitor C102 is connected to the drain of the fifth MOS transistor QD1, and the other end of the sixth capacitor C102 is connected to the second end of the tenth resistor R158 via the fourteenth resistor R157;
[0064] A first end of the fifteenth resistor R10 is connected to a second end of the tenth resistor R158 , and a second end of the fifteenth resistor R10 is connected to a source of the fifth MOS transistor QD1 ;
[0065] A first end of the sixteenth resistor R12 is connected to the second end of the fifteenth resistor R10, and a second end of the sixteenth resistor R12 is connected to the second end of the twelfth resistor R160;
[0066] The gate of the seventh MOS transistor QD3 is connected to the first end of the seventeenth resistor R16, and the source of the seventh MOS transistor QD3 is grounded;
[0067] The second end of the seventeenth resistor R16 is the driving end of the switch module 10;
[0068] A first end of the eighteenth resistor R82 is connected to the second end of the seventeenth resistor R16 , and a second end of the eighteenth resistor R82 is grounded.
[0069] Among them, the tenth resistor R158 , the eleventh resistor R153 , the twelfth resistor R160 , the thirteenth resistor R15 , the fifteenth resistor R10 , the sixteenth resistor R12 , and the seventeenth resistor R16 are all current limiting resistors.
[0070] In the embodiment of the present application, the sixth capacitor C102 is connected in series with the fourteenth resistor R157 to delay the turning on or off of the fifth MOS transistor QD1 and the sixth MOS transistor QD2. The first end of the eighteenth resistor R82 is connected to the output terminal of the control module 20, and the second end of the eighteenth resistor R82 is grounded to prevent distortion of the control signal output by the control module 20 and ensure accurate transmission of the control signal.
[0071] When the control module 20 outputs a high-level signal, the gate of the seventh MOS transistor QD3 is at a high level, the seventh MOS transistor QD3 is turned on, and the drain of the seventh MOS transistor QD3 is at a low level, so that the gate of the fifth MOS transistor QD1 and the gate of the sixth MOS transistor QD2 are both at a low level, the drain of the fifth MOS transistor QD1 is connected to the DC power supply, the fifth MOS transistor QD1 is turned on, the sixth MOS transistor QD2 is turned on, and the power supply supplies power to the load.
[0072] When the control module 20 outputs a low level signal, the gate of the seventh MOS transistor QD3 is at a low level, the seventh MOS transistor QD3 is turned off, thereby turning off the fifth MOS transistor QD1 and the sixth MOS transistor QD2, and the power supply does not supply power to the load.
[0073] The switch module 10 can be turned on and off by cooperating with the fifth MOS transistor QD1 , the sixth MOS transistor QD2 , the seventh MOS transistor QD3 and related resistors and capacitors.
[0074] In one embodiment, see Figure 4 , the detection module 30 includes an OR gate unit 310, a NOT gate unit 320, a first resistor R28 and a second resistor R26;
[0075] The first end of the first resistor R28 is the input end of the detection module 30, the input end of the OR gate unit 310 is connected to the second end of the first resistor R28, and the output end of the OR gate unit 310 is connected to the input end of the NOT gate unit 320;
[0076] The output end of the NOT gate unit 320 is the output end of the detection module 30 , and the output end of the NOT gate unit 320 is also connected to the DC power supply via the second resistor R26 .
[0077] The OR gate unit 310 includes multiple input terminals and an output terminal. The output terminal is high only when one of the input terminals is high, and the output terminal is low only when all the input terminals are low. Specifically, the OR gate unit 310 can be implemented by diodes, switches, and CMOS logic.
[0078] The NOT gate unit 320 has an input terminal and an output terminal. When the input terminal is at a high level, the output terminal is at a low level, and when the input terminal is at a low level, the output terminal is at a high level. Specifically, the NOT gate unit 320 can be implemented using CMOS logic, TTL logic, NMOS logic, PMOS logic, etc.
[0079] In the embodiment of the present application, when the control module 20 outputs a high-level signal, the input end of the OR gate unit 310 is high, the output end of the OR gate unit 310 is high, the input end of the NOT gate unit 320 is high, and the output end of the NOT gate unit 320 is low. When the control module 20 outputs a low-level signal, the input end of the OR gate unit 310 is low, the output end of the OR gate unit 310 is low, the input end of the NOT gate unit 320 is low, and the output end of the NOT gate unit 320 is high.
[0080] The cooperation of the OR gate unit 310 , the NOT gate unit 320 , the first resistor R28 , and the second resistor R26 may realize the NOR gate function of the detection module 30 .
[0081] In one embodiment, see Figure 4 , the OR gate unit 310 includes a diode DC1;
[0082] The anode of the diode DC1 is the input terminal of the OR gate unit 310 , and the cathode of the diode DC1 is the output terminal of the OR gate unit 310 .
[0083] In the embodiment of the present application, the diode DC1 is used to implement the OR gate function. The control module 20 outputs a high-level signal, and the diode DC1 is turned on.
[0084] In one embodiment, see Figure 4 , the NOT gate unit 320 includes a first MOS transistor QD70;
[0085] The gate of the first MOS transistor QD70 is the input end of the NOT gate unit 320 , the drain of the first MOS transistor QD70 is the output end of the NOT gate unit 320 , and the source of the first MOS transistor QD70 is grounded.
[0086] In the embodiment of the present application, the NOT gate function is implemented by the first MOS transistor QD70. When the gate of the first MOS transistor QD70 is at a high level, the first MOS transistor QD70 is turned on, and the drain of the first MOS transistor QD70 outputs a low level. When the gate of the first MOS transistor QD70 is at a low level, the first MOS transistor QD70 is turned off, and the drain of the first MOS transistor QD70 outputs a high level.
[0087] In one embodiment, see Figure 4, the discharge module 40 includes a second MOS transistor QD9, a third resistor R21 and a fourth resistor R19;
[0088] The gate of the second MOS transistor QD9 is the input end of the discharge module 40, the source of the second MOS transistor QD9 is grounded, and the drain of the second MOS transistor QD9 is connected to the DC power supply via the third resistor R21; the first end of the fourth resistor R19 is connected to the drain of the second MOS transistor QD9, and the second end of the fourth resistor R19 is connected to the DC power supply.
[0089] In the embodiment of the present application, when the gate of the second MOS transistor QD9 is at a high level, the second MOS transistor QD9 is turned on, the drain of the second MOS transistor QD9 is at a low level, and the voltage across the load is quickly discharged through the third resistor R21 and the fourth resistor R19.
[0090] When the gate of the second MOS transistor QD9 is at a low level, the second MOS transistor QD9 is turned off, the drain of the second MOS transistor QD9 is at a high level, and the discharge module 40 does not discharge the voltage across the load.
[0091] Through the cooperation of the second MOS transistor QD9, the third resistor R21 and the fourth resistor R19, the rapid discharge of the discharge module 40 can be achieved.
[0092] In one embodiment, see Figure 5 The present application also provides a power supply device, including the power supply discharge circuit described above, which is used to be connected to a load to supply power to the load.
[0093] The power supply device includes but is not limited to a charger.
[0094] In the embodiment of the present application, the power supply device may be a charger for a portable device using a TYPEC interface, wherein the portable device may be a mobile phone, a tablet, or the like.
[0095] By building a power discharge circuit into the charger, the load can be discharged quickly.
[0096] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.
[0097] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.
Claims
1. A power supply discharge circuit, characterized in that: It includes a switch module, a control module, a detection module and a discharge module; The output end of the control module is connected to the driving end of the switch module, the power input end of the switch module is connected to a DC power supply, and the output end of the switch module is connected to a load; The output end of the control module is also connected to the input end of the detection module, the output end of the detection module is connected to the input end of the discharge module, and the output end of the discharge module is connected to the load. The detection module is used to control the discharge module to turn on when the switch module is closed to discharge the load.
2. The power supply discharge circuit according to claim 1, wherein: The detection module includes an OR gate unit, a NOT gate unit, a first resistor and a second resistor; The first end of the first resistor is the input end of the detection module, the input end of the OR gate unit is connected to the second end of the first resistor, and the output end of the OR gate unit is connected to the input end of the NOT gate unit; The output end of the NOT gate unit is the output end of the detection module, and the output end of the NOT gate unit is also connected to the DC power supply via the second resistor.
3. The power supply discharge circuit according to claim 2, wherein: The OR gate unit includes a diode; The anode of the diode is the input terminal of the OR gate unit, and the cathode of the diode is the output terminal of the OR gate unit.
4. The power supply discharge circuit according to claim 2, wherein: The NOT gate unit includes a first MOS tube; The gate of the first MOS transistor is the input end of the NOT gate unit, the drain of the first MOS transistor is the output end of the NOT gate unit, and the source of the first MOS transistor is grounded.
5. The power supply discharge circuit according to any one of claims 1 to 4, characterized in that: The discharge module includes a second MOS tube, a third resistor and a fourth resistor; The gate of the second MOS transistor is the input end of the discharge module, the source of the second MOS transistor is grounded, and the drain of the second MOS transistor is connected to the DC power supply via the third resistor; the first end of the fourth resistor is connected to the drain of the second MOS transistor, and the second end of the fourth resistor is connected to the DC power supply.
6. The power supply discharge circuit according to any one of claims 1 to 4, characterized in that: The switch module includes a filter unit, a first switch unit and a second switch unit; The input end of the filter unit is the driving end of the switch module, and the output end of the filter unit is connected to the first input end of the first switch unit; The second input end of the first switch unit is the power input end of the switch module, and the output end of the first switch unit is connected to the first input end of the second switch unit; The second input end of the second switch unit is connected to the first input end of the first switch unit, and the output end of the second switch unit is the output end of the switch module.
7. The power supply discharge circuit according to claim 6, wherein: The filtering unit includes a fifth resistor and a first capacitor; the first switch unit includes a switch chip, a sixth resistor, a second capacitor, and a third capacitor; the second switch unit includes a third MOS transistor, a fourth MOS transistor, a seventh resistor, an eighth resistor, a ninth resistor, a fourth capacitor, and a fifth capacitor; A first end of the fifth resistor is connected to the output end of the control module, a second end of the fifth resistor is connected to the first pin of the switch chip, one end of the first capacitor is connected to the second end of the fifth resistor, and the other end of the first capacitor is grounded; The second pin of the switch chip is the power input terminal of the switch module, the third pin of the switch chip is connected to the drain of the third MOS tube, and the fourth pin of the switch chip is grounded via the sixth resistor; One end of the second capacitor is connected to the second pin of the switch chip, and the other end of the second capacitor is grounded; One end of the third capacitor is connected to the third pin of the switch chip, and the other end of the third capacitor is grounded; The source of the third MOS transistor is the output end of the switch module, the gate of the third MOS transistor is connected to the first end of the seventh resistor, and the second end of the seventh resistor is connected to the drain of the fourth MOS transistor; The gate of the fourth MOS transistor is connected to the first pin of the switch chip via the eighth resistor, and the source of the fourth MOS transistor is grounded; A first end of the ninth resistor is connected to the source of the third MOS transistor, and a second end of the ninth resistor is connected to the gate of the third MOS transistor; One end of the fourth capacitor is connected to the source of the third MOS transistor, and the other end of the fourth capacitor is connected to the gate of the third MOS transistor; One end of the fifth capacitor is connected to the source of the third MOS transistor, and the other end of the fifth capacitor is grounded.
8. The power supply discharge circuit according to any one of claims 1 to 4, characterized in that: The switch module includes a third switch unit and a fourth switch unit; The first input end of the third switch unit is the power input end of the switch module, the second input end of the third switch unit is connected to the output end of the fourth switch unit, the output end of the third switch unit is the output end of the switch module; the input end of the fourth switch unit is the driving end of the switch module.
9. The power supply discharge circuit according to claim 8, characterized in that: The third switch unit includes a fifth MOS transistor, a sixth MOS transistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor and a sixth capacitor; The fourth switch unit includes a seventh MOS tube, a seventeenth resistor and an eighteenth resistor; The drain of the fifth MOS transistor is the power input terminal of the switch module, the source of the fifth MOS transistor is connected to the source of the sixth MOS transistor, the gate of the fifth MOS transistor is connected to the first end of the tenth resistor, and the second end of the tenth resistor is connected to the drain of the seventh MOS transistor via the eleventh resistor; The gate of the sixth MOS transistor is connected to the first end of the twelfth resistor, the second end of the twelfth resistor is connected to the drain of the seventh MOS transistor via the thirteenth resistor, and the drain of the sixth MOS transistor is the output end of the switch module; One end of the sixth capacitor is connected to the drain of the fifth MOS transistor, and the other end of the sixth capacitor is connected to the second end of the tenth resistor via the fourteenth resistor; The first end of the fifteenth resistor is connected to the second end of the tenth resistor, and the second end of the fifteenth resistor is connected to the source of the fifth MOS transistor; The first end of the sixteenth resistor is connected to the second end of the fifteenth resistor, and the second end of the sixteenth resistor is connected to the second end of the twelfth resistor; The gate of the seventh MOS transistor is connected to the first end of the seventeenth resistor, and the source of the seventh MOS transistor is grounded; The second end of the seventeenth resistor is the driving end of the switch module; A first end of the eighteenth resistor is connected to a second end of the seventeenth resistor, and a second end of the eighteenth resistor is grounded.
10. A power supply device, characterized in that: A power supply discharge circuit comprising the power supply discharge circuit according to any one of claims 1 to 9, configured to be connected to a load to supply power to the load.