A driving circuit against a step signal

Abstract

The utility model relates to the technical field of anti step signal discloses a kind of driving circuit of anti step signal, including: power module, MCU module, protection chip module, sampling module, drive module, first switch module, second switch module and LC module, the input end of power module output end connection first switch module, MCU module output end connection protection chip module input end, the input end of protection chip module output end connection drive module, the input end of protection chip module sampling end connection sampling module, sampling module output end ground connection, drive module first drive end connection first switch module control end, drive module second drive end connection second switch module control end, the input end of first switch module output end connection second switch module and LC module, the input end of second switch module output end and LC module output end respectively connection sampling module. The circuit protects that drive module chip cannot be damaged, realizes stable drive power supply circuit.

Description

Technical Field

[0001] This utility model relates to the technical field of anti-step signal, specifically to a driving circuit for anti-step signals. Background Technology

[0002] As market competition intensifies, many power supplies have replaced Hall effect sensors with sampling resistors for current sampling. These sampling resistors are typically in the milliohm range. Under normal operating conditions, the current flowing through the sampling resistor is small, resulting in a relatively small voltage Vsam (Vsam = Isam * Rsam) across it, generally below 0.1V. Due to the presence of the sampling resistor Rsam, when the PWM output is low (0V), a negative voltage of 0-Vsam will appear at the input pin of the driver chip. Generally, the chip's ability to withstand negative voltage is less than -0.3V, so under normal load conditions, this does not affect the operation and reliability of the driver chip. However, under impact loads or short circuits, the output current will be much greater than the normal operating current Isam, resulting in a large voltage, even exceeding 1V, across the sampling resistor. In this case, the chip's input terminal will also experience this negative voltage exceeding 0.3V, potentially damaging the chip's withstand voltage.

[0003] Therefore, existing anti-step signal techniques need further improvement. Utility Model Content

[0004] The purpose of this invention is to provide a driving circuit that resists step signals. By employing a power supply module, an MCU module, a protection chip module, a sampling module, a driving module, a first switch module, a second switch module, and an LC module, a protection chip module can be added between the MCU module and the driving module. The protection chip module is connected to the sampling module, which can effectively protect the chip in the driving module from damage due to abnormal negative voltage.

[0005] The specific technical solution of this utility model is as follows: A step-switching signal-resistant driving circuit includes: a power supply module, an MCU module, a protection chip module, a sampling module, a driving module, a first switch module, a second switch module, and an LC module. One output terminal of the power supply module is connected to the input terminal of the first switch module. The input terminal of the MCU module is connected to an external DC power supply. The output terminal of the MCU module is connected to the input terminal of the protection chip module. The output terminal of the protection chip module is connected to the input terminal of the driving module. The sampling terminal of the protection chip module is connected to the input terminal of the sampling module. The output terminal of the sampling module is grounded. A first driving terminal of the driving module is connected to the control terminal of the first switch module. A second driving terminal of the driving module is connected to the control terminal of the second switch module. The output terminal of the first switch module is connected to the input terminals of the second switch module and the LC module. The output terminals of the second switch module and the LC module are respectively connected to the input terminals of the sampling module. The LC module is used to output voltage externally.

[0006] Furthermore, the protection chip module includes a first protection chip circuit and a second protection chip circuit. The input terminal of the first protection chip circuit is connected to the first output terminal of the MCU module, and the output terminal of the first protection chip circuit is connected to the first input terminal of the drive module. The input terminal of the second protection chip circuit is connected to the second output terminal of the MCU module, and the output terminal of the second protection chip circuit is connected to the second input terminal of the drive module. The sampling terminals of the first and second protection chip circuits are respectively connected to the input terminals of the sampling module.

[0007] Furthermore, the first protection chip circuit includes a diode D1, a resistor R11, and a resistor R12. The positive terminal of the diode D1 is connected to the first output terminal of the MCU module, the negative terminal of the diode D1 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to one end of the resistor R12 and the first input terminal of the drive module, and the other end of the resistor R12 is connected to the input terminal of the sampling module.

[0008] Furthermore, the second protection chip circuit includes a diode D2, a resistor R21, and a resistor R22. The positive terminal of the diode D2 is connected to the second output terminal of the MCU module, the negative terminal of the diode D2 is connected to one end of the resistor R21, the other end of the resistor R21 is connected to one end of the resistor R22 and the second input terminal of the drive module, and the other end of the resistor R22 is connected to the input terminal of the sampling module.

[0009] Furthermore, the sampling module includes a sampling resistor RSam, the input terminal of which is connected to the sampling terminal of the protection chip module, and the output terminal of which is grounded.

[0010] Furthermore, the first switching module is selected from MOSFET Q2 or transistor Q2.

[0011] Furthermore, the second switching module is selected from MOSFET Q1 or transistor Q1.

[0012] Furthermore, the LC module includes an inductor L1, a capacitor C1, and an output voltage Vo. One end of the inductor L1 is connected to the output terminal of the first switching module, and the other end of the inductor L1 is connected to one end of the capacitor C1 and the output voltage Vo. The other end of the capacitor C1 is connected to the input terminal of the sampling module.

[0013] Furthermore, the power supply module is selected as either a DC power supply module or an AC power supply module.

[0014] Furthermore, the AC power module includes an input power circuit, a rectifier and filter circuit, a transformer circuit, a PWM drive circuit, and an output power circuit. The input terminal of the input power circuit is connected to an external AC power source, and the output terminal of the input power circuit is connected to the input terminal of the rectifier and filter circuit. The output terminal of the rectifier and filter circuit is connected to the input terminals of the transformer circuit and the PWM drive circuit, respectively. The output terminal of the transformer circuit is connected to the input terminal of the output power circuit, and the output terminal of the output power circuit is connected to the input terminal of the first switching module.

[0015] Furthermore, the input power supply circuit includes a fuse F1, a varistor RV1, a capacitor C10, and a mutual inductor L10. One end of the fuse F1 is connected to the live wire of the AC power supply, and the other end of the fuse F1 is connected to one end of the capacitor C10, one end of the varistor RV1, and the "1" terminal of the mutual inductor L10. The other end of the varistor RV1 is connected to the neutral wire of the AC power supply. The other end of the capacitor C10 and the "3" terminal of the mutual inductor L10 are respectively connected to the neutral wire of the AC power supply. The "2" and "4" terminals of the mutual inductor L10 are respectively connected to the power input terminal of the rectifier and filter circuit.

[0016] Furthermore, the rectifier and filter circuit includes a bridge rectifier DB1, with terminals "2" and "4" of the bridge rectifier DB1 respectively connected to the power output terminal of the input power supply circuit, terminal "3" of the bridge rectifier DB1 grounded, and terminal "1" of the bridge rectifier DB1 connected to the input terminal of the transformer circuit.

[0017] Furthermore, the transformer circuit includes capacitor C11, inductor L11, capacitor C12, resistor R31, diode D3, and transformer T1. One end of inductor L11 is connected to the output terminal of the rectifier filter circuit, and the other end of inductor L11 is connected to one end of capacitor C11, one end of capacitor C12, one end of resistor R31, and terminal "1" of transformer T1. The other end of capacitor C11 is grounded. The other end of capacitor C12 and the other end of resistor R31 are connected to the negative terminal of diode D3. The positive terminal of diode D3 is connected to terminal "2" of transformer T1. The output terminal of transformer T1 is connected to the input terminal of the output power supply circuit.

[0018] Further, the PWM drive circuit includes resistor R3, capacitor C16, chip U11, resistor R45, Zener diode D15, capacitor C17, resistor R46, optocoupler U12, Zener diode D18, resistor R51, capacitor C18, resistor R53, resistor R52, resistor R54, capacitor C20, resistor R41, resistor R42, capacitor C19, resistor R62, resistor R44, resistor R43, diode D28, NMOS transistor Q12, diode D31, and resistor R32. Chip U11 ("1") and one end of capacitor C16 are grounded together. The chip U11 "5" terminal is connected to the other end of capacitor C16, one end of resistor R3, and the negative terminal of diode D31. The other end of resistor R3 is connected to the output terminal of the rectifier filter circuit. The positive terminal of diode D31 is connected to one end of resistor R32. The other end of resistor R32 is connected to the other end of the output terminal of the transformer circuit. The chip U11 "2" terminal is connected to one end of resistor R45. The other end of resistor R45 is connected to the optocoupler U12 "1" terminal, the negative terminal of Zener diode D15, and one end of capacitor C17. The chip U11 "4" is connected to one end of resistor R42 and one end of capacitor C20. The chip U11 "6"... The terminals are connected to one end of resistor R43 and one end of resistor R44. Terminal 2 of optocoupler U12 is connected to one end of resistor R46. The other end of resistor R46, the positive terminal of Zener diode D15, and the other end of capacitor C17 are all grounded. Terminal 3 of optocoupler U12 is connected to an external DC power supply through resistor R54. Terminal 4 of optocoupler U12 is connected to one end of capacitor C18 and terminal 1 of Zener diode D18. Terminal 2 of Zener diode D18 is connected to one end of resistor R51, one end of resistor R52, and one end of resistor R53. Terminal 3 of Zener diode D18 and the other end of resistor R51 are all grounded. The other end of capacitor C18... One end of resistor R53 is connected to the other end of resistor R52. The other end of resistor R52 is connected to the output terminal of the output power supply circuit. The other end of resistor R42 is connected to one end of resistor R41 and the source of NMOS transistor Q12. The other end of resistor R41 and the other end of capacitor C20 are grounded together. The other end of resistor R43 is connected to the negative terminal of diode D28. The positive terminal of diode D28 is connected to the gate of NMOS transistor Q12. The other end of resistor R44, one end of capacitor C19 and one end of resistor R62 are grounded together. The drain of NMOS transistor Q12 is connected to one end of the input terminal of the transformer circuit.

[0019] Furthermore, the output power supply circuit includes capacitor C13, resistor R36, capacitor C23, resistor R35, capacitor C14, resistor R37, diode D32, diode D33, mutual inductor L12, and diode D34. One end of the transformer circuit's output terminal is connected to one end of resistor R36 and the positive terminal of diode D32. The other end of resistor R36 is connected to one end of capacitor C13. The other end of capacitor C13 is connected to the negative terminal of diode D32, one end of capacitor C23, one end of resistor R35, and diode D34. The positive terminal of diode D34 is connected to terminal "1" of mutual inductor L12. The other end of capacitor C23 and the other end of resistor R35 are grounded together. The other end of the output terminal of the transformer circuit is connected to the positive terminal of diode D33. The negative terminal of diode D33 is connected to one end of capacitor C14 and one end of resistor R37. The other end of resistor R37 is connected to terminal "4" of mutual inductor L12. The other end of capacitor C14 is grounded. Terminal "2" of mutual inductor L12 is grounded. Terminals "4" and "3" of mutual inductor L12 are used as power output terminals.

[0020] Beneficial effects This invention provides a driving circuit that resists step signals. By employing a power supply module, an MCU module, a protection chip module, a sampling module, a driving module, a first switch module, a second switch module, and an LC module, a protection chip module can be added between the MCU module and the driving module. The protection chip module is connected to the sampling module, which can effectively protect the chip in the driving module from damage due to abnormal negative voltage.

[0021] Specifically, two parallel protection chip circuits are added between the drive signal circuits of the MCU module and the drive module chip: a first protection chip circuit with diode D1 and a second protection chip circuit with diode D2. When the PWM1 signal from the MCU module to the first protection chip circuit is high, the drive signal is transmitted to the input terminal of the drive module chip through diode D1 and resistor R11. When the PWM1 signal is low, due to the forward conduction and reverse cutoff characteristics of diode D1, the level of the drive input pin PIN1 of the drive module chip is pulled to 0V by resistor R12. This prevents the level of the input terminal of the drive module chip from being pulled to a negative voltage, effectively protecting the chip from negative voltage. Damage due to negative voltage; In addition, when the PWM2 signal from the MCU module to the second protection chip circuit is high, the drive signal here is transmitted to the chip input terminal of the drive module through diode D2 and resistor R21. When the PWM2 signal is low, due to the forward conduction and reverse cutoff characteristics of diode D2, the level of the drive input pin PIN2 of the drive module chip is pulled to 0V by resistor R22. In this way, the level of the input terminal of the drive module chip will not be pulled to negative voltage, which can effectively protect the chip from damage due to negative voltage; The use of a parallel first protection chip circuit with diode D1 and a second protection chip circuit with diode D2 can provide good complementary protection for the chip.

[0022] The power supply module supplies power to the first switching module and then outputs power to the outside through the capacitor terminal of the LC module. The circuit uses resistor RSam to reduce the cost. The power supply module can be a DC power supply module or an AC power supply module. For the AC power supply module, it includes an input power supply circuit, a rectifier and filter circuit, a transformer circuit, a PWM drive circuit and an output power supply circuit, which can realize the conversion of AC power into stable DC power, and then supply power to the first switching module. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a driving circuit for resisting step signals according to this utility model.

[0024] Figure 2 This is a schematic diagram of the circuit principle of a driving circuit for resisting step signals according to this utility model. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] See Figure 1 and Figure 2 As shown, this utility model provides a step-switching signal driving circuit, which includes: a power supply module, an MCU module, a protection chip module, a sampling module, a driving module, a first switch module, a second switch module, and an LC module. One end of the output terminal of the power supply module is connected to the input terminal of the first switch module. The input terminal of the MCU module is connected to an external DC power supply. The output terminal of the MCU module is connected to the input terminal of the protection chip module. The output terminal of the protection chip module is connected to the input terminal of the driving module. The sampling terminal of the protection chip module is connected to the input terminal of the sampling module. The output terminal of the sampling module is grounded. The first driving terminal of the driving module is connected to the control terminal of the first switch module. The second driving terminal of the driving module is connected to the control terminal of the second switch module. The output terminal of the first switch module is connected to the input terminal of the second switch module and the input terminal of the LC module. The output terminals of the second switch module and the LC module are respectively connected to the input terminal of the sampling module. The LC module is used to output voltage externally. The protection chip module includes a first protection chip circuit and a second protection chip circuit. The input terminal of the first protection chip circuit is connected to the first output terminal of the MCU module, and the output terminal of the first protection chip circuit is connected to the first input terminal of the drive module. The input terminal of the second protection chip circuit is connected to the second output terminal of the MCU module, and the output terminal of the second protection chip circuit is connected to the second input terminal of the drive module. The sampling terminals of the first and second protection chip circuits are respectively connected to the input terminals of the sampling module. The first protection chip circuit includes a diode D1, a resistor R11, and a resistor R12. The positive terminal of the diode D1 is connected to... The first output terminal of the MCU module has a diode D1 whose negative terminal is connected to one end of a resistor R11. The other end of resistor R11 is connected to one end of resistor R12 and the first input terminal of the drive module. The other end of resistor R12 is connected to the RSam input terminal of the sampling module. The second protection chip circuit includes a diode D2, a resistor R21, and a resistor R22. The positive terminal of diode D2 is connected to the second output terminal of the MCU module. The negative terminal of diode D2 is connected to one end of resistor R21. The other end of resistor R21 is connected to one end of resistor R22 and the second input terminal of the drive module. The other end of resistor R22 is connected to the RSam input terminal of the sampling module.

[0027] The sampling module includes a sampling resistor RSam. The input terminal of the sampling resistor RSam is connected to the sampling terminal of the protection chip module, and the output terminal of the sampling resistor RSam is grounded. In this configuration, the first switching module uses NMOS transistor Q2, and the second switching module uses NMOS transistor Q1. The first output terminal of the driving module is connected to the gate of NMOS transistor Q2, the drain of NMOS transistor Q2 is connected to the output terminal of the power supply module, the source of NMOS transistor Q2 is connected to the drain of NMOS transistor Q1 and one end of the inductor L1 of the LC module, the gate of NMOS transistor Q1 is connected to the second output terminal of the driving module, and the source of NMOS transistor Q1 is connected to the input terminal of the sampling resistor RSam. The LC module includes an inductor L1, a capacitor C1, and an output voltage Vo. One end of the inductor L1 is connected to the output terminal of the first switching module, and the other end of the inductor L1 is connected to one end of the capacitor C1 and the output voltage Vo. The other end of the capacitor C1 is connected to the input terminal of the sampling module. The power supply module can be either a DC power supply module or an AC power supply module; see reference. Figure 2 As shown, the AC power module includes an input power circuit, a rectifier and filter circuit, a transformer circuit, a PWM drive circuit, and an output power circuit. The input terminal of the input power circuit is connected to an external AC power source, and the output terminal of the input power circuit is connected to the input terminal of the rectifier and filter circuit. The output terminal of the rectifier and filter circuit is connected to the input terminals of the transformer circuit and the PWM drive circuit, respectively. The output terminal of the transformer circuit is connected to the input terminal of the output power circuit, and the output terminal of the output power circuit is connected to the input terminal of the first switching module.

[0028] The input power supply circuit includes a fuse F1, a varistor RV1, a capacitor C10, and a mutual inductor L10; the rectifier and filter circuit includes a bridge rectifier DB1; the transformer circuit includes a capacitor C11, an inductor L11, a capacitor C12, a resistor R31, a diode D3, and a transformer T1; and the PWM drive circuit includes a resistor R3, a capacitor C16, a chip U11, a resistor R45, a Zener diode D15, a capacitor C17, a resistor R46, an optocoupler U12, a Zener diode D18, and a resistor R51. The components include: capacitor C18, resistors R53, R52, R54, capacitor C20, resistors R41, R42, capacitor C19, resistors R62, resistors R44, R43, diode D28, NMOS transistor Q12, diode D31, and resistor R32. The output power supply circuit includes capacitor C13, resistor R36, capacitor C23, resistor R35, capacitor C14, resistor R37, diode D32, diode D33, mutual inductor L12, and diode D34. One end of fuse F1 is connected to the live wire of the AC power supply. The other end of fuse F1 is connected to one end of capacitor C10, one end of varistor RV1, and terminal "1" of mutual inductor L10. The other end of varistor RV1 is connected to the neutral wire of the AC power supply. The other end of capacitor C10 and terminal "3" of mutual inductor L10 are respectively connected to the neutral wire of the AC power supply. Terminals "2" and "4" of mutual inductor L10 are respectively connected to terminals "2" and "4" of bridge rectifier DB1 in the rectifier filter circuit. Terminal "3" of bridge rectifier DB1 is grounded. Terminal "1" of bridge rectifier DB1 is connected to one end of inductor L11 in the transformer circuit. The other end of inductor L11 is connected to one end of capacitor C11, one end of capacitor C12, one end of resistor R31, and the transformer. Terminal T1"1 of transformer T1 is connected to the ground. The other end of capacitor C11 is grounded. The other end of capacitor C12 and resistor R31 are connected to the cathode of diode D3. The anode of diode D3 is connected to terminal T1"2 of transformer T1. Terminal T1"3 of transformer T1 is connected to resistor R32. Chip U11"1 and one end of capacitor C16 are grounded. Terminal U11"5 of chip U11 is connected to the other end of capacitor C16, one end of resistor R3, and the cathode of diode D31. The other end of resistor R3 is connected to terminal DB1"1 of bridge rectifier. The anode of diode D31 is connected to one end of resistor R32. The other end of resistor R32 is connected to terminal T1"3 of transformer T1 in the transformer circuit. Terminal T1"4 of transformer T1 is grounded. Terminal U11"2 of chip U11 is connected to the ground. One end of resistor R45 is connected to terminal 1 of optocoupler U12, the negative terminal of Zener diode D15, and one end of capacitor C17. Terminal 4 of chip U11 is connected to one end of resistor R42 and one end of capacitor C20. Terminal 6 of chip U11 is connected to one end of resistor R43 and one end of resistor R44. Terminal 2 of optocoupler U12 is connected to one end of resistor R46. The other end of resistor R46, the positive terminal of Zener diode D15, and the other end of capacitor C17 are grounded. Terminal 3 of optocoupler U12 is connected to an external DC power supply through resistor R54. Terminal 4 of optocoupler U12 is connected to one end of capacitor C18 and terminal 1 of Zener diode D18. Terminal 2 of Zener diode D18 is connected to one end of resistor R51, one end of resistor R52, and... One end of resistor R53, the "3" terminal of Zener diode D18, and the other end of resistor R51 are grounded together. The other end of capacitor C18 is connected to the other end of resistor R53. The other end of resistor R52 is connected to the output terminal of the output power supply circuit. The other end of resistor R42 is connected to one end of resistor R41 and the source of NMOS transistor Q12. The other end of resistor R41 and the other end of capacitor C20 are grounded together. The other end of resistor R43 is connected to the negative terminal of diode D28. The positive terminal of diode D28 is connected to the gate of NMOS transistor Q12. The other end of resistor R44, one end of capacitor C19, and one end of resistor R62 are grounded together. The other end of capacitor C19 and the other end of resistor R62 are grounded together. The drain of NMOS transistor Q12 is connected to the "2" terminal of transformer T1 in the transformer circuit.In the transformer circuit, terminal 5 of transformer T1 is connected to one end of resistor R36 and the anode of diode D32. The other end of resistor R36 is connected to one end of capacitor C13. The other end of capacitor C13 is connected to the cathode of diode D32, one end of capacitor C23, one end of resistor R35, and the anode of diode D34. The cathode of diode D34 is connected to terminal 1 of mutual inductor L12. The other end of capacitor C23, terminal 6 of transformer T1, terminal 2 of mutual inductor L12, and the other end of resistor R35 are all grounded. In the transformer circuit, terminal 7 of transformer T1 is connected to the anode of diode D33. The cathode of diode D33 is connected to one end of capacitor C14 and one end of resistor R37. The other end of resistor R37 is connected to terminal 4 of mutual inductor L12. The other end of capacitor C14 and terminal 8 of transformer T1 are grounded. Terminals 4 and 3 of mutual inductor L12 serve as power output terminals.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A driving circuit for resisting step signals, characterized in that, The anti-step signal driving circuit includes: a power supply module, an MCU module, a protection chip module, a sampling module, a driving module, a first switch module, a second switch module, and an LC module. One output terminal of the power supply module is connected to the input terminal of the first switch module. The input terminal of the MCU module is connected to an external DC power supply. The output terminal of the MCU module is connected to the input terminal of the protection chip module. The output terminal of the protection chip module is connected to the input terminal of the driving module. The sampling terminal of the protection chip module is connected to the input terminal of the sampling module. The output terminal of the sampling module is grounded. The first driving terminal of the driving module is connected to the control terminal of the first switch module. The second driving terminal of the driving module is connected to the control terminal of the second switch module. The output terminal of the first switch module is connected to the input terminal of the second switch module and the input terminal of the LC module. The output terminals of the second switch module and the LC module are respectively connected to the input terminal of the sampling module. The LC module is used to output voltage externally.

2. The driving circuit for resisting step signals according to claim 1, characterized in that, The protection chip module includes a first protection chip circuit and a second protection chip circuit. The input terminal of the first protection chip circuit is connected to the first output terminal of the MCU module, and the output terminal of the first protection chip circuit is connected to the first input terminal of the drive module. The input terminal of the second protection chip circuit is connected to the second output terminal of the MCU module, and the output terminal of the second protection chip circuit is connected to the second input terminal of the drive module. The sampling terminals of the first protection chip circuit and the second protection chip circuit are respectively connected to the input terminal of the sampling module.

3. The driving circuit for resisting step signals according to claim 2, characterized in that, The first protection chip circuit includes a diode D1, a resistor R11, and a resistor R12. The positive terminal of the diode D1 is connected to the first output terminal of the MCU module, the negative terminal of the diode D1 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to one end of the resistor R12 and the first input terminal of the drive module, and the other end of the resistor R12 is connected to the input terminal of the sampling module.

4. The driving circuit for resisting step signals according to claim 2, characterized in that, The second protection chip circuit includes a diode D2, a resistor R21, and a resistor R22. The positive terminal of the diode D2 is connected to the second output terminal of the MCU module, the negative terminal of the diode D2 is connected to one end of the resistor R21, the other end of the resistor R21 is connected to one end of the resistor R22 and the second input terminal of the drive module, and the other end of the resistor R22 is connected to the input terminal of the sampling module.

5. The driving circuit for resisting step signals according to claim 1, characterized in that, The sampling module includes a sampling resistor RSam. The input terminal of the sampling resistor RSam is connected to the sampling terminal of the protection chip module, and the output terminal of the sampling resistor RSam is grounded.

6. The driving circuit for resisting step signals according to claim 1, characterized in that, The first switching module is selected from MOSFET Q2 or transistor Q2.

7. The driving circuit for resisting step signals according to claim 1, characterized in that, The second switching module is selected from MOSFET Q1 or transistor Q1.

8. The driving circuit for resisting step signals according to claim 1, characterized in that, The LC module includes an inductor L1, a capacitor C1, and an output voltage Vo. One end of the inductor L1 is connected to the output terminal of the first switching module, and the other end of the inductor L1 is connected to one end of the capacitor C1 and the output voltage Vo. The other end of the capacitor C1 is connected to the input terminal of the sampling module.

9. The driving circuit for resisting step signals according to claim 1, characterized in that, The power supply module can be either a DC power supply module or an AC power supply module.

10. The driving circuit for resisting step signals according to claim 9, characterized in that, The AC power module includes an input power circuit, a rectifier and filter circuit, a transformer circuit, a PWM drive circuit, and an output power circuit. The input terminal of the input power circuit is connected to an external AC power source, and the output terminal of the input power circuit is connected to the input terminal of the rectifier and filter circuit. The output terminal of the rectifier and filter circuit is connected to the input terminals of the transformer circuit and the PWM drive circuit, respectively. The output terminal of the transformer circuit is connected to the input terminal of the output power circuit, and the output terminal of the output power circuit is connected to the input terminal of the first switching module.

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