Driving circuit and electronic equipment

Abstract

The utility model provides a driving circuit and an electronic device. The driving circuit comprises a master control MCU, a driving chip, a first resistance adjusting circuit, a second resistance adjusting circuit and a power module. The master control MCU is connected with the driving chip, the first resistance adjusting circuit and the second resistance adjusting circuit. The driving chip is connected with the first resistance adjusting circuit and the second resistance adjusting circuit. The power module is connected with the first resistance adjusting circuit and the second resistance adjusting circuit. The main control MCU sends a first control signal to the driving chip and sends a second control signal to the resistance adjusting circuit; the resistance adjusting circuit adjusts the resistance value based on the second control signal; the driving chip sends a driving signal to the power module based on the first control signal and the resistance value of the resistance adjusting circuit; the power module adjusts the driving state based on the driving signal. Therefore, the circuit is protected, and the driving efficiency of the power module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control circuits, and particularly relates to a driving circuit and an electronic device. Background Art

[0002] During the driving process of a power module, the driving efficiency of the power module is composed of turn-on efficiency, conduction efficiency, and turn-off efficiency. The conduction efficiency is determined by the design of the power module itself. The turn-on efficiency and turn-off efficiency are affected by the driving circuit. In order to ensure the overvoltage safety of the power module under extreme working conditions, the resistance value in the traditional driving circuit is generally selected to be relatively large to avoid overvoltage failure of the power module. However, this method often leads to a decrease in the efficiency of the driving circuit, and further leads to a decrease in the driving efficiency of the power module. Summary of the Utility Model

[0003] In view of the above problems, embodiments of the present utility model are proposed to provide a driving circuit and an electronic device that overcome the above problems or at least partially solve the above problems.

[0004] To solve the above problems, in a first aspect, an embodiment of the present utility model discloses a driving circuit, and the circuit includes: a main control MCU, a driving chip, a first resistor adjustment circuit, a second resistor adjustment circuit, and a power module;

[0005] The main control MCU is respectively connected to the driving chip, the first resistor adjustment circuit, and the second resistor adjustment circuit; the driving chip is respectively connected to the first resistor adjustment circuit and the second resistor adjustment circuit; the power module is respectively connected to the first resistor adjustment circuit and the second resistor adjustment circuit;

[0006] The main control MCU is configured to send a first control signal to the driving chip, and send a second control signal to the first resistor adjustment circuit and the second resistor adjustment circuit;

[0007] The first resistor adjustment circuit is configured to adjust the resistance value of the first adjustment resistor circuit based on the second control signal;

[0008] The second resistor adjustment circuit is configured to adjust the resistance value of the second adjustment resistor circuit based on the second control signal;

[0009] The driving chip is configured to send a driving signal to the power module based on the first control signal, and the resistance values of the first resistor adjustment circuit and the second resistor adjustment circuit;

[0010] The power module is configured to adjust the driving state based on the driving signal.

[0011] Optionally, the first resistance adjustment circuit includes a first MOS transistor, a first turn-on resistance, and a second turn-on resistance;

[0012] The drive chip is respectively connected to the first MOS transistor and the first turn-on resistance; the first MOS transistor is connected to the main control MCU and the second turn-on resistance; the second turn-on resistance is connected to the power module; the first turn-on resistance is connected to the power module;

[0013] The first MOS transistor is configured to receive a second control signal sent by the main control MCU, and adjust the circuit connection state between the drive chip and the second turn-on resistance based on the second control signal.

[0014] Optionally, the second control signal includes: a turn-off signal and a turn-on signal;

[0015] The first MOS transistor is configured to, when receiving the turn-off signal sent by the main control MCU, disconnect the circuit connection between the drive chip and the second turn-on resistance based on the turn-off signal; when receiving the turn-on signal sent by the main control MCU, connect the circuit between the drive chip and the second turn-on resistance based on the turn-on signal.

[0016] Optionally, the second resistance adjustment circuit includes a second MOS transistor, a first turn-off resistance, and a second turn-off resistance;

[0017] The drive chip is respectively connected to the second MOS transistor and the first turn-off resistance; the second MOS transistor is connected to the main control MCU and the second turn-off resistance; the second turn-off resistance is connected to the power module; the first turn-off resistance is connected to the power module;

[0018] The second MOS transistor is configured to receive a second control signal sent by the main control MCU, and adjust the circuit connection state between the drive chip and the second disconnection resistance based on the second control signal.

[0019] Optionally, the second control signal includes: a turn-off signal and the turn-on signal;

[0020] The second MOS transistor is configured to, when receiving the turn-off signal sent by the main control MCU, disconnect the circuit connection between the drive chip and the second turn-off resistance based on the turn-off signal; when receiving the turn-on signal sent by the main control MCU, connect the circuit between the drive chip and the second turn-off resistance based on the turn-on signal.

[0021] Optionally, the second control signal is determined by the main control MCU based on the received control voltage and control current.

[0022] Optionally, when the received control voltage is less than or equal to the rated voltage and the control current is less than the rated current, the master MCU is configured to send the turn-on signal to the first MOS transistor and the second MOS transistor.

[0023] Optionally, when the received control voltage is greater than the rated voltage and less than or equal to the peak voltage, and the control current is greater than the rated current and less than or equal to the peak current, the master MCU is configured to send the turn-off signal to the first MOS transistor and the second MOS transistor.

[0024] Optionally, the first control signal is determined by the master MCU based on the received control voltage and control current.

[0025] In a second aspect, the present utility model discloses an electronic device, including the driving circuit as described above.

[0026] The embodiments of the present utility model have the following advantages:

[0027] In the embodiments of the present utility model, the driving circuit includes: a master MCU, a driving chip, a first resistor adjustment circuit, a second resistor adjustment circuit, and a power module; the master MCU is respectively connected to the driving chip, the first resistor adjustment circuit, and the second resistor adjustment circuit; the driving chip is respectively connected to the first resistor adjustment circuit and the second resistor adjustment circuit; the power module is respectively connected to the first resistor adjustment circuit and the second resistor adjustment circuit; the master MCU sends a first control signal to the driving chip, and sends a second control signal to the first resistor adjustment circuit and the second resistor adjustment circuit; the first resistor adjustment circuit adjusts the resistance value of the first adjustment resistor circuit based on the second control signal; the second resistor adjustment circuit adjusts the resistance value of the second adjustment resistor circuit based on the second control signal; the driving chip sends a driving signal to the power module based on the first control signal, and the resistance values of the first resistor adjustment circuit and the second resistor adjustment circuit; the power module adjusts the driving state based on the driving signal. Therefore, by adjusting the corresponding resistance values according to the second control signal through the first resistor adjustment circuit and the second resistor adjustment circuit, the entire driving circuit is protected, and at the same time, a corresponding driving signal is sent to the power module based on the adjusted resistance values to control the driving of the power module, improving the driving efficiency of the driving module. Description of the Drawings

[0028] Figure 1 A schematic diagram of a driving circuit provided by an embodiment of the present utility model;

[0029] Figure 2 A schematic diagram of a working condition provided by an embodiment of the present utility model;

[0030] Figure 3Schematic diagram of the relationship between turn-on resistance and voltage provided by an embodiment of the present utility model;

[0031] Figure 4 Schematic diagram of the relationship between turn-off resistance and voltage provided by an embodiment of the present utility model;

[0032] Figure 5 Schematic diagram of the relationship between turn-on resistance and turn-on efficiency provided by an embodiment of the present utility model;

[0033] Figure 6 Schematic diagram of the relationship between turn-off resistance and turn-off efficiency provided by an embodiment of the present utility model.

[0034] Explanation of reference numerals:

[0035] 01 - Main control MCU, 02 - Driver chip, 03 - First resistor adjustment circuit, 04 - Second resistor adjustment circuit, 05 - Power module, 31 - First MOS transistor, 32 - First turn-on resistance, 33 - Second turn-on resistance, 41 - Second MOS transistor, 42 - First turn-off resistance, 43 - Second turn-off resistance. Detailed implementation manners

[0036] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0037] In the related art, the resistance value of the resistor in the drive circuit is generally selected to be relatively large, resulting in a reduction in the drive efficiency of the power module. In order to solve the above technical problems, the present utility model provides a drive circuit, which includes: a main control MCU (Microcontroller Unit), a drive chip, a first resistor adjustment circuit, a second resistor adjustment circuit, and a power module; the main control MCU is respectively connected to the drive chip, the first resistor adjustment circuit, and the second resistor adjustment circuit; the drive chip is respectively connected to the first resistor adjustment circuit and the second resistor adjustment circuit; the power module is respectively connected to the first resistor adjustment circuit and the second resistor adjustment circuit; the main control MCU sends a first control signal to the drive chip, and sends a second control signal to the first resistor adjustment circuit and the second resistor adjustment circuit; the first resistor adjustment circuit adjusts the resistance value of the first adjustment resistor circuit based on the second control signal; the second resistor adjustment circuit adjusts the resistance value of the second adjustment resistor circuit based on the second control signal; the drive chip sends a drive signal to the power module based on the first control signal, as well as the resistance values of the first resistor adjustment circuit and the second resistor adjustment circuit; the power module adjusts the drive state based on the drive signal. Thus, by adjusting the corresponding resistance values according to the second control signal through the first resistor adjustment circuit and the second resistor adjustment circuit, the entire drive circuit is protected, and at the same time, a corresponding drive signal is sent to the power module based on the adjusted resistance values to control the drive of the power module and improve the drive efficiency of the drive module.

[0038] Refer to Figure 1 , which shows a schematic diagram of a drive circuit provided by the present utility model. The circuit specifically includes: a main control MCU01, a drive chip02, a first resistor adjustment circuit03, a second resistor adjustment circuit04, and a power module05.

[0039] In the embodiment of the utility model, the main control MCU01 is respectively connected to the drive chip02, the first resistor adjustment circuit03, and the second resistor adjustment circuit04; the drive chip02 is respectively connected to the first resistor adjustment circuit03 and the second resistor adjustment circuit04; the power module05 is respectively connected to the first resistor adjustment circuit03 and the second resistor adjustment circuit04.

[0040] Specifically, the output end of the main control MCU01 is respectively connected to the input end of the drive chip02, the first input end of the first electronic adjustment circuit, and the first input end of the second electronic adjustment circuit. The first output end of the drive chip02 is connected to the second input end of the first electronic adjustment circuit. The second output end of the drive chip02 is connected to the second input end of the second electronic adjustment circuit. The first input end of the drive module is connected to the output end of the first resistor adjustment circuit03. The second input end of the drive module is connected to the output end of the second resistor adjustment circuit04.

[0041] In an embodiment of the present utility model, the main control MCU01 is configured to send a first control signal to the drive chip 02, and send a second control signal to the first resistor adjustment circuit 03 and the second resistor adjustment circuit 04.

[0042] Specifically, after receiving the control voltage and the control circuit sent by the external circuit, the main control MCU01 can send a first control signal to the drive chip 02 according to the control voltage and the control circuit, and send a second control signal to the first resistor adjustment circuit 03 and the second electronic adjustment circuit.

[0043] In an embodiment of the present utility model, the first resistor adjustment circuit 03 is configured to adjust the resistance value of the first adjustment resistor circuit based on the second control signal.

[0044] In one embodiment, as Figure 1 shown, the first resistor adjustment circuit 03 includes a first MOS (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) tube 31, a first turn-on resistor 32, and a second turn-on resistor 33; the drive chip 02 is respectively connected to the first MOS tube and the first turn-on resistor 32; the first MOS tube 31 is connected to the main control MCU01 and the second turn-on resistor 33; the second turn-on resistor 33 is connected to the power module 05; the first turn-on resistor 32 is connected to the power module 05; the first MOS tube 31 is configured to receive the second control signal sent by the main control MCU01, and adjust the circuit connection state between the drive chip 02 and the second turn-on resistor 33 based on the second control signal.

[0045] Specifically, the first output terminal of the drive chip 02 is respectively connected to the second input terminal of the first MOS tube 31 and the input terminal of the first turn-on resistor 32, the output terminal of the first MOS tube 31 is connected to the input terminal of the second turn-on resistor 33, and the output terminal of the second turn-on resistor 33 and the output terminal of the first turn-on resistor 32 are connected to the first input terminal of the power module 05.

[0046] In one embodiment, the control signal may include: a turn-off signal and a turn-on signal; the first MOS tube 31 is configured to, when receiving the turn-off signal sent by the main control MCU01, disconnect the circuit connection between the drive chip 02 and the second turn-on resistor 33 based on the turn-off signal; when receiving the turn-on signal sent by the main control MCU01, connect the circuit connection between the drive chip 02 and the second turn-on resistor 33 based on the turn-on signal.

[0047] In an embodiment of the present utility model, the second resistor adjustment circuit 04 is configured to adjust the resistance value of the second adjustment resistor circuit based on the second control signal.

[0048] In one embodiment, asFigure 1 As shown in Figure 1 , the second resistor adjustment circuit 04 includes a second MOS transistor 41, a first turn-off resistor 42, and a second turn-off resistor 43; the drive chip 02 is respectively connected to the second MOS transistor 41 and the first turn-off resistor 42; the second MOS transistor 41 is connected to the main control MCU01 and the second turn-off resistor 43; the second turn-off resistor 43 is connected to the power module 05; the first turn-off resistor 42 is connected to the power module 05; the second MOS transistor 41 is configured to receive a second control signal sent by the main control MCU01 and adjust the circuit connection state between the drive chip 02 and the second turn-off resistor based on the second control signal.

[0049] Specifically, the second output terminal of the drive chip 02 is respectively connected to the second input terminal of the second MOS transistor 41 and the input terminal of the first turn-off resistor 42, the output terminal of the second MOS transistor 41 is connected to the input terminal of the second turn-off resistor 43, and the output terminals of the first turn-off resistor 42 and the second turn-off resistor 43 are connected to the second input terminal of the power module 05.

[0050] In one embodiment, the second control signal may include: a turn-off signal and a turn-on signal; the second MOS transistor 41 is configured to, when receiving the turn-off signal sent by the main control MCU01, disconnect the circuit connection between the drive chip 02 and the second turn-off resistor 43 based on the turn-off signal; when receiving the turn-on signal sent by the main control MCU01, connect the circuit between the drive chip 02 and the second turn-off resistor 43 based on the turn-on signal.

[0051] In the embodiment of the present utility model, the second control signal is determined by the main control MCU01 based on the received control voltage and control current.

[0052] In one embodiment, the main control MCU01 is configured to, when the received control voltage is less than or equal to the rated voltage and the control current is less than the rated current, send a turn-on signal to the first MOS transistor 31 and the second MOS transistor 41.

[0053] Specifically, when the control voltage received by the main control MCU01 is less than or equal to the rated voltage and the control current is less than the rated current, it can be determined that the current working condition is a normal working condition. At this time, the main control MCU01 can send a turn-on signal to the first MOS transistor 31 and the second MOS transistor 41, so that the first turn-on resistor 32 and the second turn-on resistor 33 are in parallel, and the first turn-off resistor 42 and the second turn-off resistor 43 are in parallel.

[0054] In one embodiment, the main control MCU01 is configured to, when the received control voltage is greater than the rated voltage and less than or equal to the peak voltage, and the control current is greater than the rated current and less than or equal to the peak current, send a turn-off signal to the first MOS transistor 31 and the second MOS transistor 41.

[0055] Specifically, when the control voltage received by the main control MCU01 is greater than the rated voltage and less than or equal to the peak voltage, and the control current is greater than the rated current and less than or equal to the peak current, it can be determined that the current working condition is the limit working condition. At this time, the main control MCU01 can send a turn-off signal to the first MOS transistor 31 and the second MOS transistor 41, so that the circuit connection state between the drive chip 02 and the second turn-on resistor 33 is disconnected, and the circuit connection state between the drive chip 02 and the second turn-off resistor 43 is disconnected.

[0056] In the embodiment of the present invention, the drive chip 02 is configured to send a drive signal to the power module 05 based on the first control signal, and the resistance values of the first resistance adjustment circuit 03 and the second resistance adjustment circuit 04; the power module 05 is configured to adjust the drive state based on the drive signal.

[0057] Specifically, after the drive chip 02 receives the first control signal sent by the main control MCU01, it can send a drive signal to the power module 05 according to the first control signal, and the drive signal will pass through the first resistance adjustment circuit 03 and the second resistance adjustment circuit 04. The drive signal is affected by the resistance values of the first resistance adjustment circuit 03 and the second resistance adjustment circuit, so that the power module 05 receives different drive signals. After receiving the drive signal, the power module 05 adjusts the drive state corresponding to the drive signal. The drive signal in the present invention can be a voltage signal, and the drive state can be an on drive or an off drive.

[0058] In an embodiment, the first control signal is determined by the main control MCU01 based on the received control voltage and control current.

[0059] Specifically, when the control voltage received by the main control MCU01 is less than or equal to the rated voltage and the control current is less than the rated current, it can be determined that the current working condition is the normal working condition. At this time, the main control MCU01 can send a first control signal corresponding to the normal working condition to the drive chip 02. When the control voltage received by the main control MCU01 is greater than the rated voltage and less than or equal to the peak voltage, and the control current is greater than the rated current and less than or equal to the peak current, it can be determined that the current working condition is the limit working condition. At this time, the main control MCU01 can send a first control signal corresponding to the limit working condition to the drive chip 02.

[0060] To better understand the driving circuit disclosed in the present utility model, a detailed description is provided herein. When the control voltage received by the main control MCU01 is less than or equal to the rated voltage and the control current is less than the rated current, it can be determined that the current working condition is the normal working condition. At this time, the main control MCU01 can send a first control signal to the driving chip 02 and send an on signal to the first MOS transistor 31 and the second MOS transistor 41. After receiving the on signal, the first MOS transistor 31 can turn on the circuit connection between the driving chip 02 and the second on-resistor 33, and the second MOS transistor 41 can turn on the circuit connection between the driving chip 02 and the second off-resistor 43. The driving chip 02 can send a corresponding driving signal to the power module 05 based on the parallel resistance value of the first on-resistor 32 and the second on-resistor 33, and the parallel resistance value of the first off-resistor 42 and the second off-resistor 43.

[0061] When the control voltage received by the main control MCU01 is greater than the rated voltage and less than or equal to the peak voltage, and the control current is greater than the rated current and less than or equal to the peak current, it can be determined that the current working condition is the extreme working condition. At this time, the main control MCU01 can send a first control signal to the driving chip 02 and send an off signal to the first MOS transistor 31 and the second MOS transistor 41. After receiving the off signal, the first MOS transistor 31 can disconnect the circuit connection between the driving chip 02 and the second on-resistor 33, and the second MOS transistor 41 can disconnect the circuit connection between the driving chip 02 and the second off-resistor 43. The driving chip 02 can send a corresponding driving signal to the power module 05 based on the resistance value of the first on-resistor 32 and the resistance value of the first off-resistor 42.

[0062] As Figure 2 shown, a working condition schematic diagram provided by the present utility model is illustrated. The normal working condition is that the control voltage ≤ rated voltage and the control current ≤ rated current. The extreme working condition is that the rated voltage < control voltage ≤ peak voltage and the rated current < control current ≤ peak current. The specific values of the rated voltage, peak voltage, rated current, and peak current in the present utility model can be set according to actual requirements, and no specific limitation is made herein.

[0063] As Figure 3As shown, a schematic diagram of the relationship between turn-on resistance and voltage provided by the present utility model is shown. According to the characteristics of the voltage-resistance curves under extreme operating conditions and the voltage-resistance curves under normal operating conditions, under the condition of the same turn-on overvoltage threshold, the turn-on resistance value 2 corresponding to the normal operating condition is less than the turn-on resistance value 1 corresponding to the extreme operating condition. Among them, the turn-on resistance value 1 is equal to the resistance value of the first turn-on resistance 32. In the present utility model, the turn-on resistance value 1 can be determined by the turn-on overvoltage threshold point at the time of extreme disclosure. The turn-on resistance value 2 can be determined by the turn-on overvoltage threshold point under normal operating conditions. Since the turn-on resistance value 2 is equal to the resistance of the parallel connection of the first turn-on resistance 32 and the second turn-on resistance 33, therefore, the turn-on resistance 2 is calculated from the first turn-on resistance 32 and the second turn-on resistance 33.

[0064] As Figure 4 shown, a schematic diagram of the relationship between turn-off resistance and voltage provided by the present utility model is shown. According to the characteristics of the voltage-resistance curves under extreme operating conditions and the voltage-resistance curves under normal operating conditions, under the condition of the same turn-off overvoltage threshold, the turn-off resistance value 2 corresponding to the normal operating condition is less than the turn-off resistance value 1 corresponding to the extreme operating condition. Among them, the turn-off resistance value 1 is equal to the first turn-off resistance 42. The turn-off resistance value 1 can be determined by the turn-off overvoltage threshold point under extreme operating conditions. The turn-on resistance value 2 is equal to the resistance value of the parallel connection of the first turn-off resistance 42 and the second turn-off resistance 43. Therefore, the turn-off resistance value 2 can be calculated from the first turn-off resistance 42 and the second turn-off resistance 43.

[0065] As Figure 5 shown, a schematic diagram of the relationship between turn-on resistance and turn-on efficiency provided by the present utility model is shown. As Figure 5 shown in the turn-on resistance - turn-on efficiency curve, when the turn-on resistance value 2 is less than the turn-on resistance value 1, its corresponding turn-on efficiency is higher.

[0066] As Figure 6 shown, a schematic diagram of the relationship between turn-off resistance and turn-off efficiency provided by the present utility model is shown. As Figure 6 shown in the turn-off resistance - turn-off message curve, when the turn-off resistance value 2 is less than the turn-off resistance value 1, its corresponding turn-off efficiency is higher.

[0067] In the embodiment of the present utility model, the drive circuit includes: a main control MCU, a drive chip, a first resistor adjustment circuit, a second resistor adjustment circuit, and a power module; the main control MCU is respectively connected to the drive chip, the first resistor adjustment circuit, and the second resistor adjustment circuit; the drive chip is respectively connected to the first resistor adjustment circuit and the second resistor adjustment circuit; the power module is respectively connected to the first resistor adjustment circuit and the second resistor adjustment circuit; the main control MCU is configured to send a first control signal to the drive chip, and send a second control signal to the first resistor adjustment circuit and the second resistor adjustment circuit; the first resistor adjustment circuit is configured to adjust the resistance value of the first adjustment resistor circuit based on the second control signal; the second resistor adjustment circuit is configured to adjust the resistance value of the second adjustment resistor circuit based on the second control signal; the drive chip is configured to send a drive signal to the power module based on the first control signal, and the resistance values of the first resistor adjustment circuit and the second resistor adjustment circuit; the power module is configured to adjust the drive state based on the drive signal. Thus, the first resistor adjustment circuit and the second resistor adjustment circuit adjust the corresponding resistance values according to the second control signal to protect the entire drive circuit, and at the same time send the corresponding drive signal to the power module based on the adjusted resistance values to control the drive of the power module and improve the drive efficiency of the drive module.

[0068] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0069] Although the preferred embodiments of the embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present utility model.

[0070] Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or terminal device including the element.

[0071] The above has introduced in detail a driving circuit and an electronic device provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A driving circuit, characterized in that: The driving circuit comprises: a main control MCU, a driving chip, a first resistance adjustment circuit, a second resistance adjustment circuit and a power module; The main control MCU is connected to the driving chip, the first resistance adjustment circuit and the second resistance adjustment circuit respectively; the driving chip is connected to the first resistance adjustment circuit and the second resistance adjustment circuit respectively; the power module is connected to the first resistance adjustment circuit and the second resistance adjustment circuit respectively; The main control MCU is used to send a first control signal to the driving chip, and send a second control signal to the first resistance adjustment circuit and the second resistance adjustment circuit; The first resistance adjustment circuit is used to adjust the resistance value of the first resistance adjustment circuit based on the second control signal; The second resistance adjustment circuit is used to adjust the resistance value of the second resistance adjustment circuit based on the second control signal; The driving chip is used to send a driving signal to the power module based on the first control signal, the resistance value of the first resistance adjustment circuit, and the resistance value of the second resistance adjustment circuit; The power module is used to adjust the driving state based on the driving signal.

2. The driving circuit according to claim 1, characterized in that: The first resistance adjustment circuit includes a first MOS tube, a first turn-on resistor and a second turn-on resistor; The driving chip is connected to the first MOS tube and the first turn-on resistor respectively; the first MOS tube is connected to the main control MCU and the second turn-on resistor; the second turn-on resistor is connected to the power module; the first turn-on resistor is connected to the power module; The first MOS tube is used to receive a second control signal sent by the main control MCU, and adjust the circuit connection state between the driving chip and the second turn-on resistor based on the second control signal.

3. The driving circuit according to claim 2, characterized in that: The second control signal includes: a shutdown signal and an opening signal; The first MOS tube is used to disconnect the circuit connection between the driver chip and the second turn-on resistor based on the shutdown signal when receiving the shutdown signal sent by the main control MCU; and to open the circuit connection between the driver chip and the second turn-on resistor based on the turn-on signal when receiving the turn-on signal sent by the main control MCU.

4. The driving circuit according to claim 3, characterized in that: The second resistance adjustment circuit includes a second MOS tube, a first off resistor and a second off resistor; The driving chip is connected to the second MOS tube and the first turn-off resistor respectively; the second MOS tube is connected to the main control MCU and the second turn-off resistor; The second turn-off resistor is connected to the power module; the first turn-off resistor is connected to the power module; The second MOS tube is used to receive a second control signal sent by the main control MCU, and adjust the circuit connection state between the driving chip and the second turn-off resistor based on the second control signal.

5. The driving circuit according to claim 4, characterized in that: The second control signal includes: a shutdown signal and the opening signal; The second MOS tube is used to disconnect the circuit connection between the driver chip and the second shutdown resistor based on the shutdown signal when receiving the shutdown signal sent by the main control MCU; and to open the circuit connection between the driver chip and the second shutdown resistor based on the opening signal when receiving the opening signal sent by the main control MCU.

6. The driving circuit according to claim 4, characterized in that: The second control signal is determined by the main control MCU based on the received control voltage and control current.

7. The driving circuit according to claim 6, characterized in that: The main control MCU is used to send the opening signal to the first MOS tube and the second MOS tube when the received control voltage is less than or equal to the rated voltage and the control current is less than the rated current.

8. The driving circuit according to claim 6, characterized in that: The main control MCU is used to send the shutdown signal to the first MOS tube and the second MOS tube when the received control voltage is greater than the rated voltage and less than or equal to the peak voltage, and the received control current is greater than the rated current and less than or equal to the peak current.

9. The driving circuit according to claim 6, characterized in that: The first control signal is determined by the main control MCU based on the received control voltage and control current.

10. An electronic device, characterized in that: The driving circuit comprises the driving circuit as claimed in any one of claims 1 to 9.

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