High-power drive protection circuit, method and electronic device

Abstract

The application discloses a kind of high-power drive protection circuit, method and electronic equipment, the circuit includes: control module, multiplex switch module, at least one power loop and at least one current acquisition module, current acquisition module includes Hall sensor, Hall sensor is used to acquire the current parameter of power loop, and current parameter is converted into sampling signal;At least one current acquisition module is connected with the sampling end of control module by multiplex switch module;Control module is used to output gating control signal to multiplex switch module, controls multiplex switch module gating any current acquisition module, and whether overcurrent fault occurs is judged according to at least one sampling signal collected by current acquisition module, and according to the output drive signal of fault judging result, drive power loop conduction or open circuit.The application is collected by Hall sensor to large current, overcurrent protection is realized by multiple sampling values, circuit structure is simple, and the reliability of power drive system is improved.

Description

Technical Field

[0001] This invention relates to the field of circuit technology, and in particular to a high-power drive protection circuit, method, and electronic device. Background Technology

[0002] With the development of the aviation industry, the requirements for the reliability of overcurrent protection in high-power load systems are gradually increasing.

[0003] In existing high-power drive systems, current is typically sampled using a sampling resistor. A comparator then uses the sampled current to determine if an overcurrent has occurred in the power circuit. When an overcurrent occurs, the power MOSFET is turned off, cutting off the load current. However, this existing technology has the following problems: the sampling resistor is connected in series with the high-power load circuit. Because the resistance of the sampling resistor changes due to factors such as ambient temperature variations and prolonged use, the sampling results are inaccurate. Misjudgments of overcurrent can cause the power drive unit to erroneously shut down, affecting the reliability of the high-power drive system. Summary of the Invention

[0004] This invention provides a high-power drive protection circuit, method, and electronic device to achieve overcurrent detection via Hall effect sensors and improve the reliability of power drive.

[0005] In a first aspect, embodiments of the present invention provide a high-power drive protection circuit, comprising: a control module, a multiplexer module, at least one power circuit, and at least one current acquisition module. The current acquisition modules are configured to correspond one-to-one with the power circuits. Each current acquisition module includes a Hall sensor, which is used to acquire current parameters of the power circuit and convert the current parameters into sampling signals. The at least one current acquisition module is connected to the sampling terminal of the control module through the multiplexer module. The control module is used to output a selection control signal to the multiplexer module, controlling the multiplexer module to select any current acquisition module, and to determine whether an overcurrent fault has occurred based on at least one sampling signal acquired by the current acquisition module. Based on the fault determination result, the control module outputs a drive signal to drive the power circuit to conduct or disconnect.

[0006] Optionally, the multiplexer module includes: a multi-select analog switch and an analog-to-digital converter (ADC). The multi-select analog switch has multiple input terminals and one output terminal. The input terminals are connected to the current acquisition modules one by one, and the output terminal is connected to the input terminal of the ADC. The multi-select analog switch is used to select any current acquisition module according to a selection control signal and transmit the sampling signal of the current acquisition module to the ADC. The output terminal of the ADC is connected to the control module, and the ADC is used to perform analog-to-digital conversion processing on the sampling signal.

[0007] Optionally, the multiple-choice analog switch includes multi-level nested analog switch chips.

[0008] Optionally, the multiplexer module further includes an I / O expansion unit, which includes a buffer, a decoder, and a latch. The decoder is used to send a first bus control signal to the buffer to control the buffer to receive signals from the analog-to-digital conversion unit, and to send a second bus control signal to the latch to control the latch to select any current acquisition module.

[0009] Optionally, the power circuit includes: a signal and power isolation unit, a power drive unit, and a load unit. The control terminal of the signal and power isolation unit is connected to the control module, the input terminal of the signal and power isolation unit is connected to a first power supply terminal, and the output terminal of the signal and power isolation unit is connected to the control terminal of the power drive unit. The signal and power isolation unit is used to output a level signal to the power drive unit according to the drive signal. The input terminal of the power drive unit is connected to a second power supply terminal, and the output terminal of the power drive unit is connected to the load unit. The power drive unit drives and controls the load unit according to the level signal.

[0010] Optionally, the power drive unit includes a power switch, a first filter unit, and a second filter unit. The control terminal of the power switch is electrically connected to the signal and power isolation unit, the input terminal of the power switch is electrically connected to the second power supply terminal, and the output terminal of the power switch is electrically connected to the load unit. The first terminal of the first filter unit is electrically connected to the control terminal of the power switch, and the second terminal of the first filter unit is electrically connected to the output terminal of the power switch. The first terminal of the second filter unit is electrically connected to the input terminal of the power switch, and the second terminal of the second filter unit is electrically connected to the output terminal of the power switch.

[0011] Optionally, the power switch is an NPN MOSFET.

[0012] Optionally, the strobe control signal is an N-bit address signal, where N is a positive integer greater than or equal to 2.

[0013] Secondly, embodiments of the present invention also provide a high-power drive protection method, implemented based on the above-mentioned high-power drive protection circuit, the method comprising:

[0014] Output a selection control signal to the multiplexer module to control the multiplexer module to select any current acquisition module;

[0015] Whether an overcurrent fault has occurred is determined based on at least one sampling signal acquired by the current acquisition module;

[0016] Based on the fault diagnosis result, a drive signal is output to turn the drive power circuit on or off.

[0017] Optionally, determining whether an overcurrent fault has occurred based on at least one sampling signal acquired by the current acquisition module includes:

[0018] The sample deviation sequence of each sample signal is determined based on the at least one sample signal and a preset current threshold.

[0019] The target sampling signal is determined based on the sample deviation sequence;

[0020] Whether an overcurrent fault has occurred is determined based on the target sampling signal and the preset current threshold.

[0021] Thirdly, embodiments of the present invention also provide an electronic device including the aforementioned high-power drive protection circuit.

[0022] The high-power drive protection circuit, method, and electronic device provided in this invention include a control module, a multiplexer module, at least one power circuit, and at least one Hall sensor. The Hall sensor collects the high current of the corresponding power circuit. The control module selects and receives the sampling signal from any Hall sensor, determines whether an overcurrent fault has occurred based on at least one sampling signal, and outputs a drive signal to turn the power circuit on or off based on the fault determination result. By using multiple sampling signals for overcurrent judgment, this invention solves the problem of inaccurate overcurrent sampling results in existing high-power drive systems. The circuit structure is simple, effectively samples high current, meets the requirements of high-power load circuits, avoids false shutdown caused by false overcurrent, and improves the reliability of the power drive system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a high-power drive protection circuit provided in Embodiment 1 of the present invention;

[0024] Figure 2 This is a schematic diagram of a high-power drive protection circuit provided in Embodiment 2 of the present invention;

[0025] Figure 3 This is a schematic diagram of a high-power drive protection circuit provided in Embodiment 3 of the present invention;

[0026] Figure 4 This is a flowchart of a high-power drive protection method provided in Embodiment 4 of the present invention;

[0027] Figure 5 A flowchart of another high-power drive protection method provided in Embodiment 4 of the present invention.

[0028] Figure 6 This is a schematic diagram of the structure of an electronic device provided in Embodiment 5 of the present invention. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0030] Example 1

[0031] Figure 1 This is a schematic diagram of a high-power drive protection circuit according to Embodiment 1 of the present invention. This embodiment is applicable to application scenarios that use Hall sensors to sample overcurrent in multiple high-power load circuits. The current in the high-power load circuit can be a large current exceeding 50A.

[0032] like Figure 1 As shown, the high-power drive protection circuit 00 includes: a control module 110, a multiplexer module 120, at least one power circuit 130, and at least one current acquisition module 140. The current acquisition module 140 is configured to correspond one-to-one with the power circuit 130. The current acquisition module 140 includes a Hall sensor, which is used to acquire the current parameters of the power circuit 130 and convert the current parameters into a sampling signal. The sampling signal can be a small voltage analog signal. At least one current acquisition module 140 is connected to the sampling terminal of the control module 110 through the multiplexer module 120. The control module 110 is used to output a selection control signal CP1 to the multiplexer module 120 to select any current acquisition module 140, and to determine whether an overcurrent fault has occurred based on at least one sampling signal acquired by the current acquisition module 140. Based on the fault determination result, the control module 110 outputs a drive signal CP2 to drive the power circuit 130 to turn on or off.

[0033] Among them, the control module 110 can be a DSP control chip.

[0034] In one embodiment, the control module 110 can be used to determine the sample deviation of each sample signal based on at least one sample signal and a preset current threshold, determine the target sample signal based on the sample signal corresponding to the median value of all sample deviations, and then determine whether an overcurrent fault has occurred based on the target sample signal and the preset current threshold.

[0035] In this embodiment, the Hall sensor can convert a large current analog signal into a small voltage analog signal, and during data transmission, it can convert the sampled signal into a digital signal.

[0036] like Figure 1As shown, the power circuit 130 includes a signal and power isolation unit 131, a power drive unit 132, and a load unit 133 connected in sequence. The signal and power isolation unit 131 is used to receive the drive signal CP2 output by the control module 110, and drive the power drive unit 132 to turn on or off according to the drive signal CP2, thereby driving the power circuit 130 to turn on or off.

[0037] Specifically, after the high-power load circuit is powered on, each Hall sensor collects the drive current of the corresponding power circuit 130 in a non-contact Hall sensing manner, and converts the collected high-power drive current signal into a sampling signal. The control module 110 outputs a selection control signal to the multiplexer module 120 according to a preset sampling frequency, controlling the multiplexer module 120 to select any current acquisition module 140 and receive the sampling signal of the selected current acquisition module 140. Through polling, current sampling of all power circuits 130 is achieved.

[0038] After obtaining the sampling signals, the control module 110 determines the sample deviation of each sampling signal based on at least one sampling signal and a preset current threshold. The sampling signal corresponding to the median value of all sample deviations is determined as the target sampling signal. Then, based on the target sampling signal and the preset current threshold, it determines whether an overcurrent fault has occurred. If an overcurrent fault is detected, the control module 110 outputs a first drive signal, for example, a low-level signal, and the power circuit 130 quickly disconnects under the drive of the first drive signal. If no overcurrent fault is detected, the control module 110 outputs a second drive signal, for example, a high-level signal, and the power circuit 130 remains on under the drive of the second drive signal. By acquiring multiple sampling signals using a Hall sensor for overcurrent judgment, the problem of inaccurate overcurrent sampling results in existing high-power drive systems is solved. The circuit structure is simple, with good isolation performance, high sensitivity, good linearity and stability, and can effectively sample large currents, meeting the requirements of high-power load circuits. It avoids false shutdowns caused by spurious overcurrents and improves the reliability of the power drive system.

[0039] Optionally, Figure 2 This is a schematic diagram of a high-power drive protection circuit provided in Embodiment 2 of the present invention. Figure 1 Based on this, an exemplary structure of a multiplexer module 120 is shown.

[0040] like Figure 2As shown, the multiplexer module 120 includes a multi-select analog switch 121 and an analog-to-digital converter (ADC) unit 122. The multi-select analog switch 121 has multiple input terminals and one output terminal. The input terminals are connected to the current acquisition modules 140 one by one, and the output terminal is connected to the input terminal of the ADC unit 122. The multi-select analog switch 121 is used to select any current acquisition module 140 according to the selection control signal and transmit the sampling signal of the current acquisition module 140 to the ADC unit 122. The output terminal of the ADC unit 122 is connected to the control module 110, and the ADC unit 122 is used to perform analog-to-digital conversion processing on the sampling signal.

[0041] In this embodiment, the multi-select analog switch 121 can be an eight-to-one analog switch chip AD7503.

[0042] Optionally, the strobe control signal is an N-bit address signal, where N is a positive integer greater than or equal to 2.

[0043] Specifically, during the current sampling process, the control module 110 outputs a gating control signal according to the preset sampling frequency. The multi-select analog switch 121 selects the sampling channel according to the address signal corresponding to the gating control signal. The analog-to-digital conversion unit 122 receives the sampling signal of the selected sampling channel, performs analog-to-digital conversion on the sampling signal, and converts the analog signal into a digital signal to facilitate data transmission.

[0044] In one embodiment, the multiple-select analog switch 121 may include multi-level nested analog switch chips, which multiply the number of sampling channels through nesting.

[0045] Preferably, the multi-select analog switch 121 can be a three-level nested analog switch chip. Taking an eight-to-one analog switch as an example, the three-level nested analog switch chips form a total of 512 sampling channels. The control module 110 sends a selection control signal to each level of the analog switch chip to control any sampling channel to be turned on.

[0046] like Figure 2 As shown, the multiplexer module 120 also includes an IO expansion unit 123, which includes a decoder LS1, a buffer LS2, and a latch LS3. The decoder LS1 is used to send a first bus control signal to the buffer LS2 to control the buffer LS2 to receive the sampling signal sent by the analog-to-digital converter unit 122, and to send a second bus control signal to the latch LS3 to control the latch LS3 to select any current acquisition module 140.

[0047] Preferably, the decoder LS1 can be a 74LS138 three-line to eight-line decoder, the buffer LS2 can be a 74LS244 eight-channel tri-state buffer, the latch LS3 can be a 74LS373 eight-type D-type latch, and the first bus control signal and the second bus control signal can be eight-bit address bus signals.

[0048] Specifically, decoder LS1 receives the gating control signal CP1 from control module 110. Based on CP1, it sends a first bus control signal to buffer LS2, controlling buffer LS2 to receive the digital sampling signal output by analog-to-digital converter 122. Buffer LS2 then transmits the received digital sampling signal to control module 110. After receiving the digital sampling signal, control module 110 increments the address bit of the second bus control signal by one bit and sends the incremented second bus control signal to latch LS3, controlling latch LS3 to select the next sampling channel. This process continues, achieving polling sampling of multiple sampling channels. An I / O expansion unit expands the I / O ports of control module 110, improving control flexibility.

[0049] Optionally, Figure 3 This is a schematic diagram of a high-power drive protection circuit provided in Embodiment 3 of the present invention. Figure 1 Based on this, an exemplary structure of a power drive unit is shown.

[0050] like Figure 3 As shown, the control terminal of the signal and power isolation unit 131 is connected to the control module 110, the input terminal of the signal and power isolation unit 131 is connected to the first power supply terminal VCC1, and the output terminal of the signal and power isolation unit 131 is connected to the control terminal of the power drive unit 132. The signal and power isolation unit 131 is used to output a level signal to the power drive unit 132 according to the drive signal. The input terminal of the power drive unit 132 is connected to the second power supply terminal, and the output terminal of the power drive unit 132 is connected to the load unit 133. The power drive unit 132 drives and controls the load unit 133 according to the level signal.

[0051] like Figure 3As shown, the power drive unit 132 includes a power switch Q, a first filter unit 1321, and a second filter unit 1322. The control terminal of the power switch Q is electrically connected to the signal and power isolation unit 131, the input terminal of the power switch Q is electrically connected to the second power supply terminal VCC2, and the output terminal of the power switch Q is electrically connected to the load unit. The first terminal of the first filter unit 1321 is electrically connected to the control terminal of the power switch Q, and the second terminal of the first filter unit 1321 is electrically connected to the output terminal of the power switch Q. The first terminal of the second filter unit 1322 is electrically connected to the input terminal of the power switch Q, and the second terminal of the second filter unit 1322 is electrically connected to the output terminal of the power switch Q.

[0052] The first power supply terminal VCC1 can be used to provide a DC +5V voltage, and the second power supply terminal VCC2 can be used to provide a DC +28V voltage.

[0053] In one embodiment, the power switch Q can be an NPN MOS transistor, the first filter unit 1321 is used to regulate and filter the gate-source voltage, and the second filter unit 1322 is used to regulate and filter the source-drain voltage.

[0054] In one embodiment, the signal and power isolation unit 131 may integrate an optocoupler isolated power supply unit, which can output a DC +15V voltage when triggered by a high-level signal and cut off the output voltage of the downstream end when triggered by a low-level signal.

[0055] Specifically, if the control module 110 determines that an overcurrent fault has occurred in the power circuit 130, the drive signal output by the control module 110 is a low-level signal. After receiving the low-level signal, the signal and power isolation unit 131 cuts off the output voltage at the downstream end, the drive level signal of the power switch Q becomes 0, the drain input and source output of the power switch Q are disconnected, and the load unit 133 at the downstream end is disconnected. If the control module 110 determines that no overcurrent fault has occurred in the power circuit 130, the drive signal output by the control module 110 is a high-level signal. After receiving the high-level signal, the signal and power isolation unit 131 outputs a DC +15V level signal, the drain input and source output of the MOSFET are turned on, the power circuit 130 is turned on, and the +28V power supply provided by the second power supply terminal VCC2 supplies power to the load unit 133. Through the control of the signal and power isolation unit and the power switch, overcurrent protection of high-power loads is achieved. The filtering unit improves circuit reliability. The circuit structure is simple, the isolation performance is good, and it is beneficial to improve the reliability of the power drive system.

[0056] Embodiment 4 of the present invention also provides a high-power drive protection method, which is implemented based on any of the above-mentioned high-power drive protection circuits.

[0057] Figure 4This is a flowchart of a high-power drive protection method provided in Embodiment 4 of the present invention.

[0058] like Figure 4 As shown, this high-power drive protection method includes the following steps:

[0059] Step S1: Output a selection control signal to the multiplexer module to control the multiplexer module to select any current acquisition module.

[0060] In this embodiment, the current acquisition module is equipped with a Hall sensor. The current acquisition module acquires the drive current of the high-power load circuit by non-contact Hall sensing and converts the high current signal into a low voltage analog signal.

[0061] In one embodiment, the multiplexer module can be used to acquire the sampling signal output by the current acquisition module and convert the analog sampling signal into a digital sampling signal for easy data transmission.

[0062] Step S2: Determine whether an overcurrent fault has occurred based on at least one sampling signal acquired by the current acquisition module.

[0063] Step S3: Output a drive signal based on the fault diagnosis result to turn the drive power circuit on or off.

[0064] Optionally, the strobe control signal is an N-bit address signal, where N is a positive integer greater than or equal to 2.

[0065] For example, the gating control signal can be determined by the level signal output from pins XA1 to XA5 of the control chip.

[0066] In one embodiment, after receiving the gating control signal, a decoder is used to decode the gating control signal to obtain a gating address signal. Based on the gating address signal, a first bus control signal is sent to the buffer to control the buffer to receive the digital sampling signal. After receiving the digital sampling signal, the address bits of the second bus control signal are incremented by one bit, and the second bus control signal with the incremented address bits is sent to the latch to control the latch to select the next sampling channel. This process is repeated to achieve polling sampling of multiple sampling channels.

[0067] Optionally, Figure 5 This is a flowchart of another high-power drive protection method provided in Embodiment 4 of the present invention.

[0068] like Figure 5 As shown, this high-power drive protection method specifically includes the following steps:

[0069] Step S1: Output a selection control signal to the multiplexer module to control the multiplexer module to select any current acquisition module.

[0070] Step S201: Determine the sample deviation sequence of each sample signal based on at least one sample signal and a preset current threshold.

[0071] The sample deviation sequence is a sequence obtained by sorting the sample deviations between each sampled signal and the preset current threshold in ascending order.

[0072] Step S202: Determine the target sampling signal based on the sample deviation sequence.

[0073] In one embodiment, the target sampling signal may be the sampling signal corresponding to the median value of the sample deviation sequence.

[0074] Step S203: Determine whether an overcurrent fault has occurred based on the target sampling signal and the preset current threshold.

[0075] Step S3: Output a drive signal based on the fault diagnosis result to turn the drive power circuit on or off.

[0076] Specifically, steps S201 to S203 describe a specific implementation method for determining whether an overcurrent fault has occurred based on at least one sampling signal acquired by the current acquisition module. Through multiple samplings, the sample deviation value between each sampling signal and a preset current threshold is calculated. The median value is taken as the target sampling signal in variance form. The target sampling signal is compared with the preset current threshold. If the target sampling signal is greater than the preset current threshold, an overcurrent fault in the power circuit is determined to have occurred; if the target sampling signal is less than or equal to the preset current threshold, no overcurrent fault is determined to have occurred. Using multiple sampling signals for overcurrent judgment avoids false shutdowns caused by spurious overcurrents, improving the reliability of the power drive system.

[0077] Based on any of the above embodiments, Embodiment 5 of the present invention also provides an electronic device.

[0078] Figure 6 This is a schematic diagram of the structure of an electronic device provided in Embodiment 5 of the present invention.

[0079] like Figure 6 As shown, the electronic device 100 includes the aforementioned high-power drive protection circuit 00.

[0080] In this embodiment, the electronic device 100 may be an avionics device.

[0081] In summary, the high-power drive protection circuit, method, and electronic device provided by the embodiments of the present invention include a control module, a multiplexer module, at least one power circuit, and at least one Hall sensor. The Hall sensor collects the high current of the corresponding power circuit. The control module selects and receives the sampling signal from any Hall sensor, determines whether an overcurrent fault has occurred based on at least one sampling signal, and outputs a drive signal based on the fault determination result to drive the power circuit to conduct or disconnect. This solves the problem of inaccurate overcurrent sampling results in existing high-power drive systems. The circuit structure is simple, can effectively sample high current, meets the requirements of high-power load circuits, and uses multiple sampling signals for overcurrent judgment to avoid false shutdown caused by false overcurrent, thereby improving the reliability of the power drive system.

[0082] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A high-power drive protection circuit, characterized in that, include: The system includes a control module, a multiplexer module, at least one power circuit, and at least one current acquisition module. The current acquisition module is configured to correspond one-to-one with the power circuit. Each current acquisition module includes a Hall sensor, which is used to acquire the current parameters of the power circuit and convert the current parameters into a sampling signal. The at least one current acquisition module is connected to the sampling terminal of the control module through the multiplexer module; The control module is used to output a selection control signal to the multiplexer module, control the multiplexer module to select any current acquisition module, determine whether an overcurrent fault has occurred based on at least one sampling signal acquired by the current acquisition module, and output a drive signal based on the fault determination result to drive the power circuit to be turned on or off. The control module is used to determine the sample deviation of each sample signal based on at least one sample signal and a preset current threshold, and to determine the target sample signal based on the sample signal corresponding to the median value of all sample deviations, and to determine whether an overcurrent fault has occurred based on the target sample signal and the preset current threshold. During the current sampling process, the control module outputs a gating control signal according to the preset sampling frequency, and the multiplexer module selects the sampling channel according to the address signal corresponding to the gating control signal. The multiplexer module includes a multi-select analog switch and an analog-to-digital converter. The multi-select analog switch has multiple input terminals and one output terminal. The input terminals are connected to the current acquisition modules one by one, and the output terminal is connected to the input terminal of the analog-to-digital converter. The multi-select analog switch is used to select any current acquisition module according to the selection control signal and transmit the sampling signal of the current acquisition module to the analog-to-digital converter. The output of the analog-to-digital conversion unit is connected to the control module, and the analog-to-digital conversion unit is used to perform analog-to-digital conversion processing on the sampled signal.

2. The high-power drive protection circuit according to claim 1, characterized in that, The multiple-choice analog switch includes multi-level nested analog switch chips.

3. The high-power drive protection circuit according to claim 1, characterized in that, The multiplexer module further includes an I / O expansion unit, which includes a buffer, a decoder, and a latch. The decoder is used to send a first bus control signal to the buffer to control the buffer to receive signals from the analog-to-digital converter, and to send a second bus control signal to the latch to control the latch to select any current acquisition module.

4. The high-power drive protection circuit according to claim 1, characterized in that, The power circuit includes: a signal and power isolation unit, a power drive unit, and a load unit. The control terminal of the signal and power isolation unit is connected to the control module, the input terminal of the signal and power isolation unit is connected to the first power supply terminal, and the output terminal of the signal and power isolation unit is connected to the control terminal of the power drive unit. The signal and power isolation unit is used to output a level signal to the power drive unit according to the drive signal. The input terminal of the power drive unit is connected to the second power supply terminal, and the output terminal of the power drive unit is connected to the load unit. The power drive unit drives and controls the load unit according to the level signal.

5. The high-power drive protection circuit according to claim 4, characterized in that, The power drive unit includes a power switch, a first filter unit, and a second filter unit. The control terminal of the power switch is electrically connected to the signal and power isolation unit, the input terminal of the power switch is electrically connected to the second power supply terminal, and the output terminal of the power switch is electrically connected to the load unit. The first end of the first filter unit is electrically connected to the control end of the power switch transistor, and the second end of the first filter unit is electrically connected to the output end of the power switch transistor. The first end of the second filter unit is electrically connected to the input end of the power switch, and the second end of the second filter unit is electrically connected to the output end of the power switch.

6. The high-power drive protection circuit according to any one of claims 1-5, characterized in that, The strobe control signal is an N-bit address signal, where N is a positive integer greater than or equal to 2.

7. A high-power drive protection method, characterized in that, Based on the high-power drive protection circuit according to any one of claims 1-6, the method includes: Output a selection control signal to the multiplexer module to control the multiplexer module to select any current acquisition module; Whether an overcurrent fault has occurred is determined based on at least one sampling signal acquired by the current acquisition module; Based on the fault diagnosis result, a drive signal is output to turn the drive power circuit on or off.

8. The high-power drive protection method according to claim 7, characterized in that, Determining whether an overcurrent fault has occurred based on at least one sampling signal acquired by the current acquisition module includes: The sample deviation sequence of each sample signal is determined based on the at least one sample signal and a preset current threshold. The target sampling signal is determined based on the sample deviation sequence; Whether an overcurrent fault has occurred is determined based on the target sampling signal and the preset current threshold.

9. An electronic device, characterized in that, Includes the high-power drive protection circuit as described in any one of claims 1-6.

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