Hardware overcurrent protection and recovery design circuit

Abstract

The utility model provides a hardware overcurrent protection and recovery design circuit. The hardware over-current protection and recovery design circuit comprises an over-current detection circuit and an over-current latch recovery circuit, the over-current detection circuit comprises a comparator, a first resistor, a second resistor, a third resistor and a fourth resistor, and a first input end of the comparator is connected with one end of the first resistor and one end of the second resistor. The second input end of the comparator is connected with one end of the third resistor and one end of the fourth resistor, the output end of the comparator is used for outputting overcurrent detection comparison voltage, and the overcurrent latch recovery circuit comprises a first electronic switching tube and a second electronic switching tube. The control end of the second electronic switch tube is respectively connected with the second end of the first electronic switch tube and the driving enabling end, when the current is too large, an overcurrent detection comparison voltage is output to the overcurrent latch recovery circuit, then the driving enabling end of the second electronic switch tube is pulled down after the first electronic switch tube is switched on, the second electronic switch tube is driven to be switched off, and the overcurrent detection comparison voltage is output to the overcurrent latch recovery circuit. Current is prevented from entering the circuit.

Description

Technical Field

[0001] The present disclosure relates to the field of battery applications, and in particular to a hardware overcurrent protection and recovery design circuit. Background Art

[0002] In battery applications, overcurrent protection has always been one of the essential items of BMS. However, as the charging and discharging modes of batteries become more and more diverse, the overcurrent protection circuit design of BMS can not meet the needs by relying only on one AFE and multiple MOS to design overcurrent protection, and often another overcurrent protection circuit is designed. Therefore, it is very promising to design a simple hardware overcurrent protection lock and recovery circuit.

[0003] However, in the current battery application field, how to effectively perform overcurrent protection has always been a key challenge in the industry. Most of the existing overcurrent protection and short-circuit protection circuits are designed through an AEF and multiple MOS, but for batteries that use charging ports to supply small currents, it is too wasteful to use multiple MOS or add additional overcurrent protection chips for microsecond-level short-circuit protection. Therefore, a simple, instant hardware overcurrent protection lock and recovery circuit is needed to reduce costs and avoid resource waste. Utility Model Content

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a simple and easy-to-implement hardware overcurrent protection and recovery design circuit.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A hardware overcurrent protection and recovery design circuit, comprising:

[0007] An overcurrent detection circuit, the overcurrent detection circuit comprising a comparator, a first resistor, a second resistor, a third resistor, a fourth resistor and a thirteenth resistor, the first input end of the comparator is connected to one end of the first resistor, the first input end is also connected to one end of the second resistor, the other end of the first resistor is used to connect to a reference power supply, the other end of the second resistor is used to be grounded, the other end of the second resistor is also connected to a digital ground through the thirteenth resistor, the second input end of the comparator is connected to one end of the third resistor, the second input end is also connected to one end of the fourth resistor, the other end of the third resistor is used to be connected to a digital ground, the other end of the fourth resistor is connected to the output end of the comparator, and the output end is also used to output an overcurrent detection comparison voltage;

[0008] An overcurrent latch recovery circuit, the overcurrent latch recovery circuit includes a first electronic switch tube and a second electronic switch tube, the output end of the comparator is connected to the control end of the first electronic switch tube, the first end of the first electronic switch tube is used for grounding, the control end of the second electronic switch tube is connected to the second end of the first electronic switch tube, the control end of the second electronic switch tube is also used to connect to the drive enable end, the first end of the second electronic switch tube is used to connect to the digital ground, the first end of the second electronic switch tube is grounded through the thirteenth resistor, and the second end of the second electronic switch tube is used to connect to the negative pole of the power supply.

[0009] In one embodiment, the overcurrent latch recovery circuit further includes a fifth resistor, and the control end of the second electronic switch tube is connected to the drive enable end through the fifth resistor.

[0010] In one embodiment, the overcurrent latch recovery circuit also includes a sixth resistor and a seventh resistor, the output end is connected to the control end of the first electronic switch tube through the sixth resistor, and the control end of the first electronic switch tube is also used to be grounded through the seventh resistor.

[0011] In one embodiment, the overcurrent latch recovery circuit also includes an overcurrent protection diode, the positive electrode of the overcurrent protection diode is connected to the output end, and the negative electrode of the overcurrent protection diode is connected to the control end of the first electronic switch tube through the sixth resistor.

[0012] In one embodiment, the overcurrent latch recovery circuit also includes an eighth resistor, a ninth resistor and a third electronic switch tube, the cathode of the overcurrent protection diode is connected to the control end of the third electronic switch tube through the eighth resistor, the first end of the third electronic switch tube is grounded through the ninth resistor, and the second end of the third electronic switch tube is used to connect to a reference power supply.

[0013] In one of the embodiments, the overcurrent latch recovery circuit further includes a tenth resistor, and the cathode of the overcurrent protection diode is also grounded through the tenth resistor.

[0014] In one embodiment, the overcurrent latch recovery circuit also includes an eleventh resistor, a twelfth resistor and a fourth electronic switch tube, one end of the eleventh resistor is used to receive an input high-level signal, the other end of the eleventh resistor is connected to the second end of the third electronic switch tube, the other end of the eleventh resistor is also connected to the control end of the fourth electronic switch tube, the other end of the eleventh resistor is also connected to a reference power supply through the twelfth resistor, the reference power supply is also connected to the first end of the fourth electronic switch tube, and the second end of the fourth electronic switch tube is connected to the control end of the first electronic switch tube.

[0015] In one embodiment, one end of the second resistor connected to the ground is also connected to the ground terminal of the comparator, and one end of the third resistor connected to the digital ground is also connected to the first end of the second electronic switch tube.

[0016] In one embodiment, at least one of the first resistor, the second resistor and the thirteenth resistor is a variable resistor.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] The above-mentioned hardware overcurrent protection and recovery design circuit is provided with an overcurrent detection circuit and an overcurrent latch recovery circuit, wherein the overcurrent detection circuit is used to detect and compare the voltage of the current passing through the thirteenth resistor with the reference voltage. When the current is too large, the voltage of the current passing through the thirteenth resistor is greater than the reference voltage, and the output end of the comparator outputs the overcurrent detection comparison voltage to the overcurrent latch recovery circuit, and then after turning on the first electronic switch tube, the drive enable of the second electronic switch tube is pulled down, driving the second electronic switch tube to turn off, so as to prevent the current from entering the circuit, thereby further protecting the battery from damage caused by excessive current. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The figure is a schematic diagram of the structure of a hardware overcurrent protection and recovery design circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] The present invention provides a hardware overcurrent protection and recovery design circuit, including an overcurrent detection circuit and an overcurrent latch recovery circuit. The overcurrent detection circuit includes a comparator, a first resistor, a second resistor, a third resistor, a fourth resistor and a thirteenth resistor. The first input end of the comparator is connected to one end of the first resistor, the first input end is also connected to one end of the second resistor, the other end of the first resistor is used to connect to a reference power supply, the other end of the second resistor is used to ground, the other end of the second resistor is also connected to a digital ground through the thirteenth resistor, the second input end of the comparator is connected to one end of the third resistor, the second input end is also connected to one end of the fourth resistor, and the other end of the third resistor is used to connect to a reference power supply. digital ground, the other end of the fourth resistor is connected to the output end of the comparator, and the output end is also used to output the overcurrent detection comparison voltage; the overcurrent latch recovery circuit includes a first electronic switch tube and a second electronic switch tube, the output end of the comparator is connected to the control end of the first electronic switch tube, the first end of the first electronic switch tube is used for grounding, the control end of the second electronic switch tube is connected to the second end of the first electronic switch tube, the control end of the second electronic switch tube is also used to connect to the drive enable end, the first end of the second electronic switch tube is used to connect to the digital ground, the first end of the second electronic switch tube is grounded through the thirteenth resistor, and the second end of the second electronic switch tube is used to connect to the negative pole of the power supply.

[0025] The above-mentioned hardware overcurrent protection and recovery design circuit is provided with an overcurrent detection circuit and an overcurrent latch recovery circuit, wherein the overcurrent detection circuit is used to detect and compare the voltage of the current passing through the thirteenth resistor with the reference voltage. When the current is too large, the voltage of the current passing through the thirteenth resistor is greater than the reference voltage, and the output end of the comparator outputs the overcurrent detection comparison voltage to the overcurrent latch recovery circuit, and then after turning on the first electronic switch tube, the drive enable of the second electronic switch tube is pulled down, driving the second electronic switch tube to turn off, so as to prevent the current from entering the circuit, thereby further protecting the battery from damage caused by excessive current.

[0026] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0027] like Figure 1As shown, the present disclosure provides a hardware overcurrent protection and recovery design circuit 10, including an overcurrent detection circuit 100 and an overcurrent latch recovery circuit 200. The overcurrent detection circuit 100 includes a comparator U1, a first resistor R8, a second resistor R9, a third resistor R10, a fourth resistor R11 and a thirteenth resistor RS1. The first input end of the comparator U1 is connected to one end of the first resistor R8, and the first input end is also connected to one end of the second resistor R9. The other end of the first resistor R8 is used to connect to a reference power supply VCC, the other end of the second resistor R9 is used to ground, and the other end of the second resistor R9 is also connected to a digital ground through the thirteenth resistor RS1. The second input end of the comparator U1 is connected to one end of the third resistor R10, and the second input end is also connected to one end of the fourth resistor R11. The other end of 10 is used to connect to the digital ground, the other end of the fourth resistor R11 is connected to the output end of the comparator U1, and the output end is also used to output the overcurrent detection comparison voltage; the overcurrent latch recovery circuit 200 includes a first electronic switch tube M2 and a second electronic switch tube M1, the output end of the comparator U1 is connected to the control end of the first electronic switch tube M2, the first end of the first electronic switch tube M2 is used to be grounded, the control end of the second electronic switch tube M1 is connected to the second end of the first electronic switch tube M2, the control end of the second electronic switch tube M1 is also used to be connected to the drive enable end MOS_EN, the first end of the second electronic switch tube M1 is used to connect to the digital ground, the first end of the second electronic switch tube M1 is grounded through the thirteenth resistor RS1, and the second end of the second electronic switch tube M1 is used to connect to the negative electrode P- of the power supply.

[0028] In this embodiment, the first electronic switch tube M2 and the second electronic switch tube M1 are both NMOS tubes, the first end of the first electronic switch tube M2 is the source of the NMOS tube, the second end of the first electronic switch tube M2 is the drain of the NMOS tube, the control end of the first electronic switch tube M2 is the gate of the NMOS tube, the first end of the second electronic switch tube M1 is the source of the NMOS tube, the second end of the second electronic switch tube M1 is the drain of the NMOS tube, and the control end of the second electronic switch tube M1 is the gate of the NMOS tube, which can also be explained in the following embodiments.

[0029] Furthermore, the gate of the second electronic switch tube M1 is used to be connected to the drive enable terminal. When the voltage V2 generated by the current passing through the thirteenth resistor RS1 is greater than the reference voltage V1, the comparator U1 outputs an overcurrent detection comparison voltage, that is, an overcurrent signal V3. The overcurrent signal V3 enables the first electronic switch tube M2 to be turned on, and the voltage pulls the drive enable terminal MOS_EN to the ground through the fifth resistor R1, thereby driving the second electronic switch tube M1 to be turned off to cut off the current loop and protect the battery.

[0030] In other embodiments, P- may also be the negative electrode of the discharge load.

[0031] The above-mentioned hardware overcurrent protection and recovery design circuit 10 is provided with an overcurrent detection circuit 100 and an overcurrent latch recovery circuit 200, wherein the overcurrent detection circuit 100 is used to detect and compare the voltage of the current passing through the thirteenth resistor RS1 and the reference voltage. When the current is too large, the voltage of the current passing through the thirteenth resistor RS1 is greater than the reference voltage, and the output end of the comparator U1 outputs the overcurrent detection comparison voltage to the overcurrent latch recovery circuit 200, and then turns on the first electronic switch tube M2 and pulls down the drive enable MOS_EN of the second electronic switch tube M1, driving the second electronic switch tube M1 to turn off, so as to prevent the current from entering the circuit, thereby further protecting the battery from being damaged due to excessive current.

[0032] In one embodiment, the overcurrent latch recovery circuit 200 further includes a fifth resistor R1, and the control end of the second electronic switch tube M1 is connected to the drive enable end MOS_EN through the fifth resistor R1. When a circuit overcurrent occurs, the voltage of the drive enable end MOS_EN is pulled down, thereby turning off the second electronic switch tube M1, preventing the negative electrode of the power supply from inputting current into the battery circuit, thereby further protecting the battery.

[0033] In one embodiment, the overcurrent latch recovery circuit 200 further includes a sixth resistor R4 and a seventh resistor R7, the output end is connected to the control end of the first electronic switch tube M2 through the sixth resistor R4, and the control end of the first electronic switch tube M2 is also used to be grounded through the seventh resistor R7.

[0034] Further, when the output end of the comparator U1 outputs an overcurrent detection comparison voltage, the voltage is divided by the sixth resistor R4 and the seventh resistor R7, and the voltage drop generated by the seventh resistor R7 enables the first electronic switch tube M2 to be turned on. At the same time, the control end of the first electronic switch tube M2 and the seventh resistor R7 are grounded, that is, the sixth resistor R4 and the seventh resistor R7 are connected in series to play a current limiting role in protecting the circuit.

[0035] In one embodiment, the overcurrent latch recovery circuit 200 further includes an overcurrent protection diode D1, the anode of the overcurrent protection diode D1 is connected to the output end, and the cathode of the overcurrent protection diode D1 is connected to the control end of the first electronic switch tube M2 through the sixth resistor R4. In this embodiment, the overcurrent protection diode D1 is used to ensure that the current outputs an overcurrent signal from the output end of the comparator U1 to the overcurrent latch recovery circuit 200 to prevent the current from flowing in the reverse direction. Furthermore, the output end of the comparator U1 outputs an overcurrent signal V3 through the overcurrent protection diode D1 to the overcurrent signal V4.

[0036] In one embodiment, the overcurrent latch recovery circuit 200 also includes an eighth resistor R3, a ninth resistor R5 and a third electronic switch tube Q2, the cathode of the overcurrent protection diode D1 is connected to the control end of the third electronic switch tube Q2 through the eighth resistor R3, the first end of the third electronic switch tube Q2 is grounded through the ninth resistor R5, and the second end of the third electronic switch tube Q2 is used to connect to the reference power supply VCC.

[0037] In this embodiment, the third electronic switch tube Q2 is an NPN transistor, the first end of the NPN transistor is the emitter, the second end of the NPN transistor is the collector, and the control end of the NPN transistor is the base, which can also be explained in the following embodiments.

[0038] In one embodiment, the overcurrent latch recovery circuit 200 further includes a tenth resistor R6, and the cathode of the overcurrent protection diode D1 is also grounded through the tenth resistor R6. It can be understood that the eighth resistor R3 is connected in parallel with the tenth resistor R6, and the circuit current is divided through the eighth resistor R3 and the tenth resistor R6 to prevent the circuit from being damaged by excessive current.

[0039] Furthermore, the overcurrent signal V4 passes through the eighth resistor R3 and the tenth resistor R6 respectively, thereby shunting the eighth resistor R3 and the tenth resistor R6. The voltage drop generated by the tenth resistor R6 enables the third electronic switch tube Q2 to be turned on. At this time, the reference power supply VCC is grounded through the third electronic switch tube Q2 and the ninth resistor R5.

[0040] In one embodiment, the overcurrent latch recovery circuit 200 further includes an eleventh resistor R12, a twelfth resistor R2 and a fourth electronic switch tube Q1, one end of the eleventh resistor R12 is used to receive an input high-level signal, the other end of the eleventh resistor R12 is connected to the second end of the third electronic switch tube Q2, the other end of the eleventh resistor R12 is also connected to the control end of the fourth electronic switch tube Q1, the other end of the eleventh resistor R12 is also connected to the reference power supply VCC through the twelfth resistor R2, the reference power supply VCC is also connected to the first end of the fourth electronic switch tube Q1, and the second end of the fourth electronic switch tube Q1 is connected to the control end of the first electronic switch tube M2.

[0041] In this embodiment, the fourth electronic switch tube Q1 is a PNP type triode, the first end of the PNP type triode is the emitter, the second end of the PNP type triode is the collector, and the control end of the PNP type triode is the base.

[0042] In one embodiment, when the overcurrent signal V4 passes through the eighth resistor R3 and the tenth resistor R6 respectively, the eighth resistor R3 and the tenth resistor R6 are shunted, the voltage drop generated by the tenth resistor R6 enables the third electronic switch tube Q2 to be turned on, the reference signal generated by the reference power supply VCC is grounded through the twelfth resistor R2, the third electronic switch tube Q2 and the ninth resistor R5, the twelfth resistor R2 generates a voltage drop, and enables the fourth electronic switch tube Q1 to be turned on. Furthermore, the reference signal is grounded through the fourth electronic switch tube Q1 and the seventh resistor R7, and the circuit is in an overcurrent protection state.

[0043] In another embodiment, when the overcurrent protection state is released, the microcontroller unit (MCU) inputs a high-level voltage (i.e., MCU_H releases an overcurrent signal) to the circuit, so that the voltage between the base and the collector of the fourth electronic switch tube Q1 is greater than the voltage between the emitter and the base, thereby turning off the fourth electronic switch tube Q1. At this time, the reference signal cannot be grounded through the seventh resistor R7 and the tenth resistor R6 respectively, and then the tenth resistor R6 cannot generate a voltage drop to turn off the third electronic switch tube Q2. At this time, the voltage of the driving enable terminal is MOS_EN, and the voltage drop generated by the fifth resistor R1 enables the second electronic switch tube M1 to turn on, thereby restoring the normal circuit state.

[0044] In one embodiment, a grounded end of the second resistor R9 is also connected to the ground end of the comparator U1 , and a digital grounded end of the third resistor R10 is also connected to the first end of the second electronic switch tube M1 .

[0045] In one embodiment, at least one of the first resistor R8 , the second resistor R9 and the thirteenth resistor RS1 is a variable resistor.

[0046] In this embodiment, the thirteenth resistor RS1 is a current detection resistor. When the battery charger has a current I entering the overcurrent detection circuit 100 from the negative electrode P- and grounded, the input voltage V2=RS1*I, the reference voltage V1=VCC*R9 / (R9+R8), when V2>V1, the current I reaches the overcurrent value, and the output end of the comparator U1 outputs an overcurrent detection comparison voltage, that is, a high-level signal V3. The high-level signal V3 is converted into a unidirectional signal V4 after passing through the overcurrent protection diode D1, and then passes through the sixth resistor R4 to generate a voltage drop on the seventh resistor R7, enabling the first electronic switch tube M2 to turn on, and the drain of the first electronic switch tube M2 converts the signal V4 into an overcurrent output signal V5. At this time, V5=GND, and a signal is output at the drive enable end to further drive the second electronic switch tube M1 to turn off, thereby preventing the current from the negative electrode P- of the power supply from entering the circuit.

[0047] Compared with the prior art, the present invention has at least the following advantages:

[0048] The above-mentioned hardware overcurrent protection and recovery design circuit 10 is provided with an overcurrent detection circuit 100 and an overcurrent latch recovery circuit 200, wherein the overcurrent detection circuit 100 is used to detect and compare the battery input high level signal (i.e., the voltage of the current passing through the thirteenth resistor RS1) V2 and the reference voltage V1. When the current is too large, the battery input high level signal V2 is greater than the reference voltage V1, and the output end of the comparator U1 outputs the overcurrent detection comparison voltage V3 to the overcurrent latch recovery circuit 200, and then turns on the first electronic switch tube M2 and pulls down the drive enable MOS_EN of the second electronic switch tube M1, driving the second electronic switch tube M1 to turn off, so as to prevent the current from entering the circuit, thereby further protecting the battery from being damaged due to excessive current.

[0049] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A hardware overcurrent protection and recovery design circuit, characterized in that: include: An overcurrent detection circuit, the overcurrent detection circuit comprising a comparator, a first resistor, a second resistor, a third resistor, a fourth resistor and a thirteenth resistor, the first input end of the comparator is connected to one end of the first resistor, the first input end is also connected to one end of the second resistor, the other end of the first resistor is used to connect to a reference power supply, the other end of the second resistor is used to be grounded, the other end of the second resistor is also connected to a digital ground through the thirteenth resistor, the second input end of the comparator is connected to one end of the third resistor, the second input end is also connected to one end of the fourth resistor, the other end of the third resistor is used to be connected to a digital ground, the other end of the fourth resistor is connected to the output end of the comparator, and the output end is also used to output an overcurrent detection comparison voltage; An overcurrent latch recovery circuit, the overcurrent latch recovery circuit includes a first electronic switch tube and a second electronic switch tube, the output end of the comparator is connected to the control end of the first electronic switch tube, the first end of the first electronic switch tube is used for grounding, the control end of the second electronic switch tube is connected to the second end of the first electronic switch tube, the control end of the second electronic switch tube is also used to connect to the drive enable end, the first end of the second electronic switch tube is used to connect to the digital ground, the first end of the second electronic switch tube is grounded through the thirteenth resistor, and the second end of the second electronic switch tube is used to connect to the negative pole of the power supply.

2. The hardware overcurrent protection and recovery design circuit according to claim 1, characterized in that: The overcurrent latch recovery circuit also includes a fifth resistor, and the control end of the second electronic switch tube is connected to the drive enable end through the fifth resistor.

3. The hardware overcurrent protection and recovery design circuit according to claim 1, characterized in that: The overcurrent latch recovery circuit also includes a sixth resistor and a seventh resistor. The output end is connected to the control end of the first electronic switch tube through the sixth resistor. The control end of the first electronic switch tube is also used to be grounded through the seventh resistor.

4. The hardware overcurrent protection and recovery design circuit according to claim 3, characterized in that: The overcurrent latch recovery circuit also includes an overcurrent protection diode, the anode of the overcurrent protection diode is connected to the output end, and the cathode of the overcurrent protection diode is connected to the control end of the first electronic switch tube through the sixth resistor.

5. The hardware overcurrent protection and recovery design circuit according to claim 4, characterized in that: The overcurrent latch recovery circuit also includes an eighth resistor, a ninth resistor and a third electronic switch tube. The cathode of the overcurrent protection diode is connected to the control end of the third electronic switch tube through the eighth resistor. The first end of the third electronic switch tube is grounded through the ninth resistor. The second end of the third electronic switch tube is used to connect to a reference power supply.

6. The hardware overcurrent protection and recovery design circuit according to claim 5, characterized in that: The overcurrent latch recovery circuit further includes a tenth resistor, and the cathode of the overcurrent protection diode is also grounded through the tenth resistor.

7. The hardware overcurrent protection and recovery design circuit according to claim 6, characterized in that: The overcurrent latch recovery circuit also includes an eleventh resistor, a twelfth resistor and a fourth electronic switch tube, one end of the eleventh resistor is used to receive an input high-level signal, the other end of the eleventh resistor is connected to the second end of the third electronic switch tube, the other end of the eleventh resistor is also connected to the control end of the fourth electronic switch tube, the other end of the eleventh resistor is also connected to a reference power supply through the twelfth resistor, the reference power supply is also connected to the first end of the fourth electronic switch tube, and the second end of the fourth electronic switch tube is connected to the control end of the first electronic switch tube.

8. The hardware overcurrent protection and recovery design circuit according to claim 1, characterized in that: One end of the second resistor connected to the ground is also connected to the ground end of the comparator, and one end of the third resistor used for connecting to the digital ground is also connected to the first end of the second electronic switch tube.

9. The hardware overcurrent protection and recovery design circuit according to claim 8, characterized in that: At least one of the first resistor, the second resistor, and the thirteenth resistor is a variable resistor.

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