Half-bridge power supply self-checking protection device and power supply equipment

Abstract

The utility model discloses a half-bridge power supply self-checking protection device and power supply equipment. The device comprises a power supply management chip, a resistance sampling module, a self-unlocking protection circuit, an integrated processing module and an auxiliary power supply module, the power management chip is used for being connected with a half-bridge power supply to drive the half-bridge power supply to output electric energy, the resistance sampling module is used for being connected with the half-bridge power supply to carry out signal sampling, the resistance sampling module is connected with the self-unlocking protection circuit, and the self-unlocking protection circuit is connected with the power management chip and the integrated processing module; the integrated processing module is in remote communication connection with a control center; and the auxiliary power supply module is used for supplying power to the power supply management chip and the integrated processing module. According to the device, self-inspection protection of the half-bridge power supply can be realized through resistance sampling, and a remote control center can be notified in time when an abnormity occurs, so that the operation safety of the half-bridge power supply can be improved, and the use experience of power supply equipment of a user is improved. The power supply can be widely applied to the technical field of power supplies.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, and in particular to a half-bridge power supply self-checking protection device and a power supply equipment. BACKGROUND

[0002] In the field of power electronics, power supply technology is an important component. Power supply components can provide stable power supply for various electronic devices. With the development of technology, the power demand of power supply is becoming larger and larger, and higher requirements for the stability and safety of power supply are put forward. In this background, the self-checking protection technology of power supply emerges as the times require. It can monitor the working state of the power supply in real time, discover and handle potential problems in time, and ensure the stable operation of the power supply.

[0003] In related technologies, half-bridge power supply is a common topology, which is widely used in medium and high power of 100W-3000W. It includes two switching tubes, which are upper tube and lower tube, respectively. The upper tube and the lower tube control the positive and negative half cycle power supply of the power supply. At present, when the power supply self-checking protection of the half-bridge power supply is carried out, there is a problem of insufficient safety, which is easy to cause power supply failure and affect the user's power supply equipment experience.

[0004] Therefore, the problems in the related art need to be solved. Invention content

[0005] The purpose of the present application is to at least solve one of the technical problems in the related art.

[0006] Therefore, an object of an embodiment of the present application is to provide a half-bridge power supply self-checking protection device and a power supply equipment.

[0007] In order to achieve the above technical purpose, the technical scheme adopted by the embodiment of the present application comprises:

[0008] On the one hand, the embodiment of the present application provides a half-bridge power supply self-checking protection device, which comprises:

[0009] a power management chip, a resistance sampling module, a self-unlocking protection circuit, an integrated processing module and an auxiliary power supply module;

[0010] The power management chip is used to connect the half-bridge power supply to drive the half-bridge power supply to output electric energy. The resistance sampling module is used to connect the half-bridge power supply for signal sampling. The resistance sampling module is connected to the self-unlocking protection circuit. The self-unlocking protection circuit is connected to the power management chip and the integrated processing module.

[0011] The integrated processing module is used for remote communication connection with the control center. The auxiliary power supply module is used to supply power to the power management chip and the integrated processing module.

[0012] In addition, the half-bridge power supply self-checking protection device according to the above-mentioned embodiment of the application can have the following additional technical features:

[0013] Further, in an embodiment of the application, the resistance sampling module comprises an upper tube series resistance, a thirteenth transistor, a fourteenth transistor, a thirteenth resistance, a second resistance and a sixteenth resistance, a first end of the upper tube series resistance is used for connecting the upper tube of the half-bridge power supply, the first end of the upper tube series resistance is also used for connecting the emitter of the thirteenth transistor, the second end of the upper tube series resistance is connected to the first end of the thirteenth resistance and the emitter of the fourteenth transistor, the second end of the thirteenth resistance and the base of the fourteenth transistor are connected, the second end of the upper tube series resistance is connected to the emitter of the thirteenth transistor, the collector of the thirteenth transistor is connected to the base of the thirteenth transistor, the collector of the thirteenth transistor is also connected to the ground through the second resistance, the base of the thirteenth transistor is also connected to the base of the fourteenth transistor through the sixteenth resistance.

[0014] Among them, the thirteenth transistor and the fourteenth transistor are PNP type transistors.

[0015] Further, in an embodiment of the application, the upper tube series resistance is an alloy resistance.

[0016] Further, in an embodiment of the application, the resistance sampling module further comprises a fifteenth capacitor.

[0017] The fifteenth capacitor and the thirteenth resistance are connected in parallel.

[0018] Further, in an embodiment of the application, the resistance sampling module further comprises a lower tube series resistance, a thirteenth transistor, a seventh transistor, a sixth transistor, a third resistance, a thirtieth resistance, a thirty-first resistance, a twenty-ninth resistance, a twentieth resistance, a twenty-fourth resistance and a twenty-sixth resistance.

[0019] The first end of the lower tube series resistance is used for connecting the lower tube of the half-bridge power supply, the second end of the lower tube series resistance is grounded, the first end of the lower tube series resistance is also used for connecting the emitter of the thirteenth diode, the base of the thirteenth diode is connected to the collector of the thirteenth diode, the collector of the thirteenth diode is grounded through the third resistor, the collector of the thirteenth diode is also connected to the base of the seventh triode through the thirtieth resistor, the base of the seventh triode is also grounded through the thirty-first resistor, the emitter of the seventh triode is grounded, the base of the seventh triode is also connected to the collector of the sixth triode, the collector of the seventh triode is connected to the base of the sixth triode, the collector of the fourth triode is connected to the collector of the sixth triode through the twentieth resistor and the twenty-fourth resistor; the base of the sixth triode is connected to the emitter of the sixth triode through the twenty-ninth resistor, and the emitter of the sixth triode is connected to the self-unlocking protection circuit.

[0020] In the embodiment, the thirteenth diode and the sixth triode are PNP type triodes, and the seventh triode is an NPN type triode.

[0021] Further, in the embodiment, the lower tube series resistance is an alloy resistance.

[0022] Further, in the embodiment, the resistance sampling module further comprises a twenty-fourth capacitor.

[0023] The twenty-fourth capacitor and the thirty-first resistor are connected in parallel.

[0024] Further, in the embodiment, the resistance sampling module further comprises a twenty-third capacitor.

[0025] The twenty-third capacitor and the twenty-ninth resistor are connected in parallel.

[0026] Further, in the embodiment, the power management chip comprises a DSP chip.

[0027] In the embodiment, a power supply device is also provided, which comprises the half-bridge power supply self-checking protection device.

[0028] The advantages and beneficial effects of the present application will be partially given in the following description, partially will become obvious from the following description, or will be learned by the practice of the present application:

[0029] The application discloses a kind of half-bridge power supply self-checking protection device and power supply equipment, device includes power management chip, resistance sampling module, self-unlocking protection circuit, integrated processing module and auxiliary power module;The power management chip is used to connect the half-bridge power supply, to drive the half-bridge power supply output electric energy, the resistance sampling module is used to connect the half-bridge power supply and carry out signal sampling, the resistance sampling module connects the self-unlocking protection circuit, the self-unlocking protection circuit connects the power management chip and the integrated processing module;The integrated processing module is used and control center remote communication connection, the auxiliary power module is used to power the power management chip and the integrated processing module.This half-bridge power supply self-checking protection device can be realized by resistance sampling to the self-checking protection of half-bridge power supply, and when abnormality occurs, remote control center can be notified in time, can improve the operation safety of half-bridge power supply, improve the power supply equipment use experience of user. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following introduces the drawings of the related technical solutions in the embodiments of the present application or the prior art. It should be understood that the drawings in the following introduction are only for the convenience of clearly describing part of the embodiments of the technical solutions of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the premise that there is no creative labor.

[0031] Figure 1 The structure of a half-bridge power supply self-checking protection device provided in the embodiments of the present application is shown.

[0032] Figure 2 The circuit diagram of a resistance sampling module provided in the embodiments of the present application is shown.

[0033] Figure 3 The circuit diagram of a self-unlocking protection circuit provided in the embodiments of the present application is shown. DETAILED DESCRIPTION

[0034] The present application will be further described below in conjunction with the drawings of the specification and specific embodiments. The described embodiments should not be regarded as limiting the present application, and all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] In the following description, "some embodiments" are related to a subset of all possible embodiments, but it can be understood that "some embodiments" can be the same subset or different subset of all possible embodiments, and can be combined with each other without conflict.

[0036] In the description of the present application, it needs to be understood that the terms "length", "upper", "lower", "front", "rear", "left", "right", "top", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the features defined as "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0037] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the field of power electronics, power supply technology is an important part, and power supply components can provide stable power supply for various electronic devices. With the development of technology, the power demand of power supply is getting larger and larger, and higher requirements for the stability and safety of power supply are put forward. In this background, the self-checking protection technology of power supply emerges as the times require, which can monitor the working state of power supply in real time, discover and handle potential problems in time, so as to ensure the stable operation of power supply.

[0039] In the related art, half-bridge power supply is a common topology, which is widely used in medium and high power of 100W-3000W, which includes two switching tubes, which are upper tube and lower tube, respectively. The upper tube and the lower tube control the power supply of the positive and negative half cycle, respectively. At present, when the half-bridge power supply is subjected to power self-checking protection operation, there is a problem of insufficient safety, which is easy to cause power failure, affecting the user's power equipment use experience.

[0040] Therefore, in the embodiments of the present application, a half-bridge power supply self-checking protection device and a power supply equipment are provided, which can realize self-checking protection of the half-bridge power supply through resistance sampling, and can timely notify the remote control center when an abnormality occurs, so as to improve the operation safety of the half-bridge power supply and improve the user's power equipment use experience.

[0041] In the following, a half-bridge power supply self-checking protection device and a power supply equipment provided in the embodiments of the present application will be described in detail with reference to specific drawings.

[0042] The application provides a half-bridge power supply self-checking protection device and a power supply equipment, which can be applied to the technical field of power supply. Figure 1 The half-bridge power supply self-checking protection device provided in the application mainly comprises:

[0043] a power management chip, a resistance sampling module, a self-unlocking protection circuit, an integrated processing module and an auxiliary power supply module.

[0044] The power management chip is used to connect the half-bridge power supply to drive the half-bridge power supply to output electric energy, the resistance sampling module is used to connect the half-bridge power supply to sample signals, the resistance sampling module is connected to the self-unlocking protection circuit, and the self-unlocking protection circuit is connected to the power management chip and the integrated processing module.

[0045] The integrated processing module is used to be remotely connected to a control center, and the auxiliary power supply module is used to supply power to the power management chip and the integrated processing module.

[0046] In the application, the half-bridge power supply self-checking protection device can realize self-checking protection of the half-bridge power supply through resistance sampling, can timely inform the remote control center when an abnormality occurs, can improve the operation safety of the half-bridge power supply and improve the use experience of the power supply equipment of the user.

[0047] Specifically, in the application, the half-bridge power supply self-checking protection device can comprise a power management chip, a resistance sampling module, a self-unlocking protection circuit, an integrated processing module and an auxiliary power supply module, the power management chip can be used to connect the half-bridge power supply to drive the half-bridge power supply to output electric energy. For example, in some embodiments, the power management chip can adopt a DSP chip. The DSP chip has high processing capacity and supports various interfaces such as serial interfaces, parallel interfaces, USB, Ethernet and the like, which facilitates communication with other hardware.

[0048] In the application, for the resistance sampling module, a conventional high-end resistance sampling needs to be matched with an expensive isolation operational amplifier and an isolation power supply to realize high-precision measurement, and the implementation mode has a high price. When a high-voltage PNP transistor is matched with a low-temperature floating sampling resistor to realize measurement, an additional independent power supply is not needed, and the price is low. However, since the PN junction of the transistor is greatly affected by temperature, the precision of the measurement mode is low, and the practicability is not good. If a current transformer or a Hall sensor is used, the relative cost is also high. In the application, resistance sampling can be matched with a transistor, specifically, refer to Figure 2 , Figure 2A schematic diagram of a resistance sampling module is shown.

[0049] In some embodiments, the resistance sampling module comprises an upper tube series resistance, a third transistor Q3, a fourth transistor Q4, a thirteenth resistance R13, a second resistance R2 and a sixteenth resistance R16, a first end of the upper tube series resistance is configured to be connected to an upper tube of the half-bridge power supply, the first end of the upper tube series resistance is also configured to be connected to an emitter of the third transistor Q3, a second end of the upper tube series resistance is connected to a first end of the thirteenth resistance R13 and an emitter of the fourth transistor Q4, a second end of the thirteenth resistance R13 and a base of the fourth transistor Q4 are connected, the second end of the upper tube series resistance is connected to the emitter of the third transistor Q3, a collector of the third transistor Q3 is connected to the base of the third transistor Q3, the collector of the third transistor Q3 is also connected to the ground through the second resistance R2, the base of the third transistor Q3 is also connected to the base of the fourth transistor Q4 through the sixteenth resistance R16.

[0050] In some embodiments, the third transistor Q3 and the fourth transistor Q4 are PNP type transistors.

[0051] In some embodiments, the resistance sampling module further comprises a lower tube series resistance, a thirteenth transistor Q13, a seventh transistor Q7, a sixth transistor Q6, a third resistance R3, a thirtieth resistance R30, a thirty-first resistance R31, a twenty-ninth resistance R29, a twentieth resistance R20, a twenty-fourth resistance R24 and a twenty-sixth resistance R26.

[0052] A first end of the lower tube series resistance is configured to be connected to a lower tube of the half-bridge power supply, a second end of the lower tube series resistance is connected to the ground, the first end of the lower tube series resistance is also configured to be connected to an emitter of the thirteenth transistor Q13, a base of the thirteenth transistor Q13 is connected to a collector of the thirteenth transistor Q13, the collector of the thirteenth transistor Q13 is connected to the ground through the third resistance R3, the collector of the thirteenth transistor Q13 is also connected to a base of the seventh transistor Q7 through the thirtieth resistance R30, the base of the seventh transistor Q7 is also connected to the ground through the thirty-first resistance R31, an emitter of the seventh transistor Q7 is connected to the ground, the base of the seventh transistor Q7 is also connected to a collector of the sixth transistor Q6, a base of the sixth transistor Q6 is connected to a collector of the sixth transistor Q6, the collector of the fourth transistor Q4 is connected to the collector of the sixth transistor Q6 through the twentieth resistance R20 and the twenty-fourth resistance R24; the base of the sixth transistor Q6 is connected to an emitter of the sixth transistor Q6 through the twenty-ninth resistance R29, the emitter of the sixth transistor Q6 is connected to the self-unlocking protection circuit.

[0053] The thirteenth diode Q13 and the sixth triode Q6 are PNP type triodes, and the seventh triode Q7 is an NPN type triode.

[0054] In the embodiments of the present application, for the resistance sampling module, it can include an upper tube series resistance and a lower tube series resistance, such as Figure 2 In the embodiments of the present application, the thirty-second resistance R32 and the thirty-third resistance R33 are upper tube series resistances, and the forty-fifth resistance R45 and the forty-sixth resistance R46 are lower tube series resistances. These resistances can be alloy resistances, which are special resistors whose resistance bodies are made of metal alloy materials. Compared with traditional carbon film resistors or metal film resistors, alloy resistances have higher precision, better temperature stability and lower thermoelectric EMF, and thus are very popular in some high-precision and high-performance applications.

[0055] In the embodiments of the present application, the third triode Q3 and the fourth triode Q4 are of the same type, and the fourth triode Q4 is a detection tube. The collector and the base of the third triode Q3 are connected, and are connected in the form of a diode. In addition to being able to raise the detection threshold and reduce the resistance value of the sampling resistance to reduce the loss, the third triode Q3 can also compensate the detection tube to a certain extent, so as to avoid that the current protection threshold deviates too much due to the increase or decrease of the working temperature. In the embodiments of the present application, the thirteenth resistance R13 and the sixteenth resistance R16 are divided, and then are connected to the base of the fourth triode Q4. Similarly, the lower tube series resistance and the thirteenth diode Q13 connected in the form of a diode are connected to the third resistance R3 and the thirtieth resistance R30, and then are connected to the base of the seventh triode Q7. At this time, if the current of the sampling resistance increases, the fourth triode Q4 and the seventh triode Q7 are turned on, so that the sixth triode Q6 is turned on and grounded to output a low level. For details, refer to Figure 3 , Figure 3The circuit structure schematic diagram of the self-unlocking protection circuit provided in the embodiment of the application is shown. In the embodiment of the application, if the sixth transistor Q6 is turned on to output a low level, the second transistor Q2 and the fifth transistor Q5 are turned off, the twenty-second capacitor C22 is discharged, the first transistor Q1 is turned on to output a high level, wherein the SD1 signal can be transmitted to the power management chip, so that the power management chip stops driving the half-bridge power supply to output power, and the SD2 signal can be transmitted to the integrated processing module, and the integrated processing module can be transmitted to the control center through the RS485 communication line or the like. If the sampling current decreases, the sixth transistor Q6 is turned off, the twenty-second capacitor C22 is charged, the second transistor Q2 and the fifth transistor Q5 are turned on, the first transistor Q1 is turned off, the SD1 signal is a low level, and the power chip will be restarted to drive the half-bridge power supply to output power. The SD2 signal is transmitted to the integrated processing module and transmitted to the control center through the RS485 communication line or the like. In this way, the remote monitoring of the power supply state can be realized.

[0056] In the embodiment of the application, the integrated processing module in the half-bridge power supply self-checking protection device can be a communication module, which can be used for remote communication connection with the control center and transmit the detection signals related to the half-bridge power supply to the control center. The auxiliary power supply module can supply power to the modules in the half-bridge power supply self-checking protection device. Of course, it should be noted that in the embodiment of the application, other protection modules can also be integrated in the half-bridge power supply self-checking protection device, and the application does not limit this.

[0057] The half-bridge power supply self-checking protection device provided in the embodiment of the application has at least the following advantages:

[0058] 1) The cost performance of the resistance sampling and transistor scheme is maintained, and the temperature compensation mechanism is added to reduce the error caused by temperature changes;

[0059] 2) The standard transistor is changed to a diode connection, and the circuit in which the equivalent voltage source of the sampling resistor is connected in series is equivalent to reducing the detection threshold of the transistor, and a lower resistance resistor can be used for current sampling to reduce the loss.

[0060] 3) The application combines the advantages of protection locking and repeated power startup during protection. After retriggering protection, the power is automatically locked and then unlocked. If the protection is not removed and enters the locked state, this process is repeated, which not only realizes fault removal and self-recovery, but also greatly reduces the impact energy on the power supply per unit time, which helps to improve the life of the power supply under abnormal conditions.

[0061] 4) Compared with the prior art, the application can also send the fault condition of the power supply to the control center (such as the guard station) through RS485 or other communication forms, which helps to quickly locate and solve the power supply fault.

[0062] In the embodiment of the application, as Figure 2As shown, the resistance sampling module can further include a fifteenth capacitor, a twenty-fourth capacitor and a twenty-third capacitor, the fifteenth capacitor and the thirteenth resistor R13 are connected in parallel, the twenty-fourth capacitor and the thirty-first resistor R31 are connected in parallel, and the twenty-third capacitor and the twenty-ninth resistor are connected in parallel. These capacitors can filter out interference signals and improve the accuracy and reliability of self-checking protection.

[0063] In the embodiments of the present application, a power supply device is also provided, which comprises the half-bridge power supply self-checking protection device described above. The working state of the power supply device is more stable and reliable, which can improve the safety of power supply and further improve the user experience.

[0064] In the description of the present application, the description of the terms "one embodiment", "another embodiment" or "some embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A half-bridge power supply self-checking protection device, characterized in that, The application relates to a power management chip, a resistance sampling module, a self-unlocking protection circuit, an integrated processing module and an auxiliary power module. The power management chip is used for connecting the half-bridge power supply to drive the half-bridge power supply to output electric energy; the resistance sampling module is used for connecting the half-bridge power supply to sample signals; the resistance sampling module is connected with the self-unlocking protection circuit; and the self-unlocking protection circuit is connected with the power management chip and the integrated processing module. The integrated processing module is used for remote communication connection with a control center; and the auxiliary power module is used for power supply of the power management chip and the integrated processing module. The resistance sampling module comprises an upper tube series resistance, a third triode, a fourth triode, a thirteenth resistance, a second resistance and a sixteenth resistance; the first end of the upper tube series resistance is used for connecting an upper tube of the half-bridge power supply; the first end of the upper tube series resistance is also used for connecting the emitter of the third triode; the second end of the upper tube series resistance is connected with the first end of the thirteenth resistance and the emitter of the fourth triode; the second end of the thirteenth resistance and the base of the fourth triode are connected; the second end of the upper tube series resistance is connected with the emitter of the third triode; the collector of the third triode is connected with the base of the third triode; the collector of the third triode is also connected to the ground through the second resistance; the base of the third triode is also connected to the base of the fourth triode through the sixteenth resistance.

2. A half-bridge power supply self-checking protection device according to claim 1, characterized in that, The third triode and the fourth triode are PNP type triodes. The upper tube series resistance is an alloy resistance.

3. A half-bridge power supply self-checking protection device according to claim 2, characterized in that, The resistance sampling module further comprises a fifteenth capacitor.

4. A half-bridge power supply self-checking protection device according to claim 2, characterized in that, The fifteenth capacitor and the thirteenth resistance are connected in parallel. The resistance sampling module further comprises a lower tube series resistance, a thirteenth triode, a seventh triode, a sixth triode, a third resistance, a thirtieth resistance, a thirty-first resistance, a twenty-ninth resistance, a twentieth resistance, a twenty-fourth resistance and a twenty-sixth resistance.

5. A half-bridge power supply self-checking protection device according to claim 2, characterized in that, The first end of the lower tube series resistance is used for connecting a lower tube of the half-bridge power supply; the second end of the lower tube series resistance is connected to the ground; the first end of the lower tube series resistance is also used for connecting the emitter of the thirteenth triode; the base of the thirteenth triode is connected with the collector of the thirteenth triode; the collector of the thirteenth triode is connected to the ground through the third resistance; the collector of the thirteenth triode is also connected to the base of the seventh triode through the thirtieth resistance; the base of the seventh triode is also connected to the ground through the thirty-first resistance; the emitter of the seventh triode is connected to the ground; the base of the seventh triode is also connected to the collector of the sixth triode; the collector of the seventh triode is connected with the base of the sixth triode; the collector of the fourth triode is connected to the collector of the sixth triode through the twentieth resistance and the twenty-fourth resistance; the base of the sixth triode is connected to the emitter of the sixth triode through the twenty-ninth resistance; and the emitter of the sixth triode is connected with the self-unlocking protection circuit. ​ The thirteenth diode and the sixth triode are PNP type triodes, and the seventh triode is an NPN type triode.

6. A half-bridge power supply self-checking protection device according to claim 5, characterized in that, The lower tube series resistance is an alloy resistance.

7. A half-bridge power supply self-checking protection device according to claim 5, characterized in that, The resistance sampling module further comprises a twenty-fourth capacitor. The twenty-fourth capacitor and the thirty-first resistance are connected in parallel.

8. A half bridge power supply self-checking protection device as defined in claim 5, characterized by, The resistance sampling module further comprises a twenty-third capacitor. The twenty-third capacitor and the twenty-ninth resistance are connected in parallel.

9. A half bridge power supply self-checking protection device as defined in claim 1, characterized by, The power management chip comprises a DSP chip.

10. A power supply device characterized by comprising: The half-bridge power supply self-checking protection device comprises a half-bridge power supply.

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