Control circuit, method, equipment, storage medium, device and electronic load

Abstract

The invention discloses a control circuit, method and equipment, a storage medium, a device and an electronic load, the control circuit comprises a control unit, a DAC and a plurality of operational amplifier units, and the output end of the control unit is connected with the input end of the DAC. Each operational amplifier unit comprises an operational amplifier and a controllable switch, the output end of the DAC is connected with the non-inverting input end of the operational amplifier through a first resistor, the inverting input end of the operational amplifier is grounded through a second resistor, the output end of the operational amplifier is correspondingly connected with the grid electrode of an MOS tube, and the source electrode of the MOS tube is grounded through a third resistor. One end of the third resistor is connected with the inverting input end of the operational amplifier through the fourth resistor, the other end of the third resistor is connected with the non-inverting input end of the operational amplifier through the fifth resistor, the first connecting end of the controllable switch is connected with the output end of the operational amplifier, and the second connecting end of the controllable switch is connected with the inverting input end of the operational amplifier. The output end of the control unit is connected with the control end of the controllable switch.

Description

Technical Field

[0001] The present application relates to the technical field of electronic loads, and in particular to a control circuit, method, device, storage medium, apparatus and electronic load. Background Art

[0002] Electronic load is a commonly used instrument in measurement and control technology. Electronic load controls the conduction of the internal MOS tube. It is a device that consumes electrical energy by relying on the power dissipation of the MOS tube. It plays a very important role in the field of power supply testing.

[0003] Since there are multiple MOS tubes in the electronic load, different numbers of MOS tubes need to be turned on when the electronic load works in different current ranges. Therefore, in the related art, the control signal of the electronic load is input to the gate of the MOS tube through an analog switch, and the on-off control of the MOS tube is realized by the analog switch, and the conduction degree of the MOS tube is adjusted by the control signal to control the output current of the MOS tube. Since the analog switch has an on-resistance, the control signal passing through will be attenuated, which will cause the control of the MOS tube to deviate, resulting in a deviation in the control of the MOS tube, which reduces the accuracy of the electronic load. Summary of the invention

[0004] The present application aims to provide a control circuit, method, device, storage medium, apparatus and electronic load, which can improve the accuracy of the electronic load.

[0005] In a first aspect, an embodiment of the present application provides an electronic load control circuit for controlling a plurality of MOS tubes of an electronic load, the circuit comprising:

[0006] Control unit;

[0007] DAC, the output end of the control unit is connected to the input end of the DAC, the control unit outputs a control signal through the DAC, and the control signal is used to control the conduction degree of the MOS tube;

[0008] A plurality of operational amplifier units, wherein the plurality of operational amplifier units correspond to the plurality of MOS tubes, each of the operational amplifier units comprises an operational amplifier and a controllable switch, wherein the output end of the DAC is connected to the non-inverting input end of the operational amplifier through a first resistor, the inverting input end of the operational amplifier is grounded through a second resistor, the output end of the operational amplifier is correspondingly connected to the gate of the MOS tube, the source of the MOS tube is grounded through a third resistor, one end of the third resistor is connected to the inverting input end of the operational amplifier through a fourth resistor, the other end of the third resistor is connected to the non-inverting input end of the operational amplifier through a fifth resistor, the first connection end of the controllable switch is connected to the output end of the operational amplifier, the second connection end of the controllable switch is connected to the inverting input end of the operational amplifier, and the output end of the control unit is connected to the control end of the controllable switch; when the controllable switch is turned on, the maximum input voltage is less than the threshold voltage of the MOS tube, and the maximum input voltage is: the voltage input to the non-inverting input end of the operational amplifier after the preset maximum value of the control signal is divided by the first resistor and the fifth resistor.

[0009] According to some embodiments of the present application, the control unit includes:

[0010] MCU, the output end of the MCU is connected to the input end of the DAC;

[0011] A multi-way analog switch, wherein the multi-way analog switch has a control end, multiple first connection ends and multiple second connection ends, the output end of the MCU is connected to the control end of the multi-way analog switch, the multiple first connection ends of the multi-way analog switch are all connected to the power supply end, and the second connection end of the multi-way analog switch is connected to the control end of at least one of the controllable switches.

[0012] According to some embodiments of the present application, it further includes:

[0013] A capacitor, one end of the capacitor is connected to the output end of the operational amplifier, and the other end of the capacitor is connected to the inverting input end of the operational amplifier.

[0014] In a second aspect, an embodiment of the present application provides an electronic load control method, which is applied to the electronic load control circuit as described above, and the method includes:

[0015] Controlling the controllable switch corresponding to the target MOS tube to be disconnected, so that the corresponding operational amplifier unit is an error amplifier;

[0016] Sending a control signal so that the control signal is output to the gate of the target MOS tube through the operational amplifier unit, thereby controlling the conduction degree of the target MOS tube;

[0017] The controllable switch corresponding to the target MOS tube is controlled to be turned on, so that the corresponding operational amplifier unit is a voltage follower. Due to the voltage dividing effect of the first resistor and the fifth resistor, the gate voltage of the control signal output to the target MOS tube through the operational amplifier unit cannot reach the threshold voltage, and the target MOS tube is disconnected.

[0018] According to some embodiments of the present application, the control unit includes an MCU and a multi-way analog switch, the output end of the MCU is connected to the input end of the DAC, the multi-way analog switch has a control end, a plurality of first connection ends and a plurality of second connection ends, the output end of the MCU is connected to the control end of the multi-way analog switch, the plurality of first connection ends of the multi-way analog switch are all connected to the power supply end, and the second connection end of the multi-way analog switch is connected to the control end of at least one of the controllable switches;

[0019] The controllable switch corresponding to the control target MOS tube is turned off, comprising:

[0020] Control the target second connection end to be disconnected from the power supply end, so that the controllable switch corresponding to the target MOS tube is disconnected, and the target second connection end is: the second connection end connected to the controllable switch corresponding to the target MOS tube;

[0021] The controlling a controllable switch corresponding to the target MOS tube to be turned on includes:

[0022] The second connection terminal of the control target is connected to the power supply terminal so that the controllable switch corresponding to the target MOS tube is turned on.

[0023] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0024] at least one processor;

[0025] at least one memory for storing at least one program;

[0026] When at least one of the programs is executed by at least one of the processors, the electronic load control method as described above is implemented.

[0027] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a program executable by a processor is stored. When the program executable by the processor is executed by the processor, it is used to implement the electronic load control method as described above.

[0028] In a fifth aspect, an embodiment of the present application provides an electronic load control device, which is applied to the electronic load control circuit as described above, including:

[0029] A first control module, used for controlling the controllable switch corresponding to the target MOS tube to be disconnected, so that the corresponding operational amplifier unit is an error amplifier;

[0030] A sending module, used for sending a control signal, so that the control signal is output to the gate of the target MOS tube through the operational amplifier unit, thereby controlling the conduction degree of the target MOS tube;

[0031] The second control module is used to control the controllable switch corresponding to the target MOS tube to be turned on, so that the corresponding operational amplifier unit is a voltage follower. Due to the voltage dividing effect of the first resistor and the fifth resistor, the gate voltage of the control signal output to the target MOS tube through the operational amplifier unit cannot reach the threshold voltage, and the target MOS tube is disconnected.

[0032] According to some embodiments of the present application, the control unit includes an MCU and a multi-way analog switch, the output end of the MCU is connected to the input end of the DAC, the multi-way analog switch has a control end, a plurality of first connection ends and a plurality of second connection ends, the output end of the MCU is connected to the control end of the multi-way analog switch, the plurality of first connection ends of the multi-way analog switch are all connected to the power supply end, and the second connection end of the multi-way analog switch is connected to the control end of at least one of the controllable switches;

[0033] The first control module comprises:

[0034] A first control submodule, used for controlling the target second connection end to be disconnected from the power supply end, so that the controllable switch corresponding to the target MOS tube is disconnected, the target second connection end being: the second connection end connected to the controllable switch corresponding to the target MOS tube;

[0035] The second control module comprises:

[0036] The second control submodule is used to control the target second connection end to be connected to the power supply end so that the controllable switch corresponding to the target MOS tube is turned on.

[0037] In a sixth aspect, an embodiment of the present application provides an electronic load, comprising the electronic load control circuit as described above.

[0038] In the embodiment of the present application, the controllable switch corresponding to the target MOS tube is controlled to be disconnected, so that the operational amplifier unit is an error amplifier, and a control signal is sent so that the control signal is output to the gate of the target MOS tube through the operational amplifier unit, thereby controlling the conduction degree of the target MOS tube. By controlling the controllable switch corresponding to the target MOS tube to be turned on, the operational amplifier unit is made into a voltage follower, and the control signal is output to the gate voltage of the target MOS tube through the operational amplifier unit due to the voltage dividing effect of the first resistor and the fifth resistor, and the target MOS tube is disconnected. Compared with the traditional electronic load control technology, the embodiment of the present application realizes the on-off control of the MOS tube while avoiding the attenuation of the control signal, thereby improving the accuracy of the electronic load.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0041] Figure 1 A circuit diagram of an electronic load control circuit embodiment provided in this application;

[0042] Figure 2 A schematic diagram of an electronic device embodiment provided by the present application;

[0043] Figure 3 A schematic diagram of an embodiment of an electronic load control device provided in the present application;

[0044] Reference numerals:

[0045] The electronic device 100 , the processor 110 , the memory 120 , the electronic load control device 200 , the first control module 210 , the sending module 220 , and the second control module 230 . DETAILED DESCRIPTION

[0046] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0047] In the description of the present application, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In the description of this application, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0049] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0050] Refer to the following Figures 1 to 3 A control circuit, method, device, storage medium, apparatus and electronic load according to an embodiment of the present application are described.

[0051] The embodiment of the present application provides an electronic load control circuit for controlling multiple MOS tubes of an electronic load, and the circuit includes:

[0052] Control unit;

[0053] DAC, the output end of the control unit is connected to the input end of the DAC, and the control unit outputs a control signal through the DAC, and the control signal is used to control the conduction degree of the MOS tube;

[0054] A plurality of operational amplifier units are provided, wherein the plurality of operational amplifier units correspond to the plurality of MOS tubes, each operational amplifier unit comprises an operational amplifier and a controllable switch, wherein the output end of the DAC is connected to the in-phase input end of the operational amplifier through a first resistor, the inverting input end of the operational amplifier is grounded through a second resistor, the output end of the operational amplifier is correspondingly connected to the gate of the MOS tube, the source of the MOS tube is grounded through a third resistor, one end of the third resistor is connected to the inverting input end of the operational amplifier through a fourth resistor, the other end of the third resistor is connected to the in-phase input end of the operational amplifier through a fifth resistor, the first connection end of the controllable switch is connected to the output end of the operational amplifier, the second connection end of the controllable switch is connected to the inverting input end of the operational amplifier, and the output end of the control unit is connected to the control end of the controllable switch; when the controllable switch is turned on, the maximum input voltage is less than the threshold voltage of the MOS tube, and the maximum input voltage is: the voltage input to the in-phase input end of the operational amplifier after the preset maximum value of the control signal is divided by the first resistor and the fifth resistor.

[0055] In the embodiment of the present application, the controllable switch corresponding to the target MOS tube is controlled to be disconnected, so that the operational amplifier unit is an error amplifier, and a control signal is sent so that the control signal is output to the gate of the target MOS tube through the operational amplifier unit, thereby controlling the conduction degree of the target MOS tube. By controlling the controllable switch corresponding to the target MOS tube to be turned on, the operational amplifier unit is made into a voltage follower, and the control signal is output to the gate voltage of the target MOS tube through the operational amplifier unit due to the voltage dividing effect of the first resistor and the fifth resistor, and the target MOS tube is disconnected. Compared with the traditional electronic load control technology, the embodiment of the present application realizes the on-off control of the MOS tube while avoiding the attenuation of the control signal, thereby improving the accuracy of the electronic load.

[0056] Some implementation methods of the present application, such as Figure 1 As shown, Q1, Q2, Q3 and Q4 are all MOS tubes. U2 is a DAC. AMP1, AMP2, AMP3 and AMP4 are all operational amplifiers. JFET1, JFET2, JFET3 and JFET4 are all controllable switches, and the controllable switches use N-channel junction field effect transistors. R11, R21, R31, R41 are all first resistors. R13, R23, R33 and R43 are all second resistors. Rs1, Rs2, Rs3 and Rs4 are all third resistors. R14, R24, R34 and R44 are all fourth resistors. R12, R22, R32 and R42 are all fifth resistors.

[0057] In some embodiments of the present application, when the controllable switch is disconnected, the operational amplifier unit is an error amplifier. The control signal is output to the gate of the MOS tube through the operational amplifier to control the conduction degree of the MOS tube, and the MOS tube is in a working state. The third resistor collects the output current of the MOS tube and feeds back to the in-phase input terminal and the inverting input terminal of the operational amplifier through the fifth resistor and the fourth resistor respectively, and performs feedback regulation, thereby adjusting the output terminal voltage of the operational amplifier.

[0058] In some embodiments of the present application, when the controllable switch is turned on, the output voltage of the operational amplifier is fed back to the inverting input terminal of the operational amplifier through the controllable switch, resulting in the failure of the feedback of the fourth resistor and the fifth resistor. Therefore, the operational amplifier unit is a voltage follower. The control signal is input to the non-inverting input terminal of the operational amplifier after voltage division by the first resistor and the fifth resistor, and then output by the operational amplifier to the gate of the MOS tube. At this time, the maximum input voltage of the operational amplifier is calculated by the following formula:

[0059] Vo=R2 / (R1+R2)*Vi,

[0060] Wherein, Vo is the output voltage of the operational amplifier, R1 is the resistance value of the first resistor, R2 is the resistance value of the fifth resistor, and Vi is the preset maximum value of the control signal.

[0061] By setting the resistance ratio of the first resistor and the fifth resistor, the maximum input voltage of the operational amplifier is smaller than the threshold voltage of the MOS tube. Even if the control signal is output at a preset maximum value, the output voltage of the operational amplifier cannot turn on the MOS tube.

[0062] In one embodiment of the present application, the control unit includes:

[0063] MCU, the output of MCU is connected to the input of DAC;

[0064] A multi-way analog switch, the multi-way analog switch has a control end, multiple first connection ends and multiple second connection ends, the output end of the MCU is connected to the control end of the multi-way analog switch, the multiple first connection ends of the multi-way analog switch are all connected to the power supply end, and the second connection end of the multi-way analog switch is connected to the control end of at least one controllable switch.

[0065] In this embodiment, the MCU outputs a control signal through the DAC. The MUC turns on different paths of the multi-way analog switch, so that the controllable switch corresponding to the turned-on path is connected to the power supply end, and the power supply end provides a turn-on voltage for the controllable switch, so that the controllable switch is turned on.

[0066] Some embodiments of the present application, such as Figure 1 As shown, U1 is an MCU and U3 is a multi-channel analog switch.

[0067] In some embodiments of the present application, the number of controllable switches connected to the second connection end of each multi-way analog switch is not limited. When a second connection end of the multi-way analog switch is connected to multiple controllable switches, multiple controllable switches can be controlled simultaneously, that is, the on and off of multiple corresponding MOS tubes can be controlled.

[0068] In some embodiments of the present application, the number of controllable switches connected to the second connection end of each multi-way analog switch is different, and therefore the number of MOS tubes controlled by each second connection end is different. Different current ranges can be selected by turning on or off different paths of the multi-way analog switch.

[0069] An embodiment of the present application further includes:

[0070] A capacitor, one end of the capacitor is connected to the output end of the operational amplifier, and the other end of the capacitor is connected to the inverting input end of the operational amplifier.

[0071] Some implementation methods of the present application, such as Figure 1 As shown, C1, C2, C3 and C4 are all capacitors.

[0072] In addition, the embodiment of the present application further provides an electronic load control method, which is applied to the above electronic load control circuit, and the method includes:

[0073] Step S100: controlling the controllable switch corresponding to the target MOS tube to be turned off, so that the corresponding operational amplifier unit is an error amplifier, and the target MOS tube is a MOS tube corresponding to a preset current range;

[0074] Step S200: sending a control signal so that the control signal is output to the gate of the target MOS tube through the operational amplifier unit, thereby controlling the conduction degree of the target MOS tube;

[0075] Step S300: Control the controllable switch corresponding to the target MOS tube to be turned on, so that the corresponding operational amplifier unit is a voltage follower. Due to the voltage division effect of the first resistor and the fifth resistor, the gate voltage of the control signal output to the target MOS tube through the operational amplifier unit cannot reach the threshold voltage, and the target MOS tube is disconnected.

[0076] According to some embodiments of the present application, the control unit includes an MCU and a multi-way analog switch, the output end of the MCU is connected to the input end of the DAC, the multi-way analog switch has a control end, a plurality of first connection ends and a plurality of second connection ends, the output end of the MCU is connected to the control end of the multi-way analog switch, the plurality of first connection ends of the multi-way analog switch are all connected to the power supply end, and the second connection end of the multi-way analog switch is connected to the control end of at least one controllable switch;

[0077] The step S100 of “controlling the controllable switch corresponding to the target MOS tube to be turned off” includes:

[0078] Step S110: Control the target second connection terminal to be disconnected from the power supply terminal, so that the controllable switch corresponding to the target MOS tube is disconnected, and the target second connection terminal is: the second connection terminal connected to the controllable switch corresponding to the target MOS tube;

[0079] The step S300 of “controlling the controllable switch corresponding to the target MOS tube to turn on” includes:

[0080] Step S310: controlling the target second connection terminal to be connected to the power supply terminal so that the controllable switch corresponding to the target MOS tube is turned on.

[0081] The electronic load control method provided in the embodiment of the present application can implement each process implemented in the above circuit embodiment and achieve the same beneficial effects. To avoid repetition, it will not be described here.

[0082] In addition, an embodiment of the present application further discloses an electronic device 100, such as Figure 2 As shown, including:

[0083] at least one processor 110;

[0084] At least one memory 120, used to store at least one program;

[0085] When at least one program is executed by at least one processor 110 , the above electronic load control method is implemented.

[0086] The electronic device provided in the embodiment of the present application can implement each process implemented in the above circuit embodiment and achieve the same beneficial effects. To avoid repetition, it will not be described here.

[0087] In addition, an embodiment of the present application further provides a computer-readable storage medium, in which a program executable by a processor is stored. When the program executable by the processor is executed by the processor, it is used to implement the above electronic load control method.

[0088] The computer-readable storage medium provided in the embodiment of the present application can implement the various processes implemented in the above-mentioned circuit embodiment and achieve the same beneficial effects. To avoid repetition, it will not be described here.

[0089] In addition, the embodiment of the present application further provides an electronic load control device 200, which is applied to the above electronic load control circuit, such as Figure 3 As shown, including:

[0090] The first control module 210 is used to control the controllable switch corresponding to the target MOS tube to be disconnected, so that the corresponding operational amplifier unit is an error amplifier;

[0091] The sending module 220 is used to send a control signal so that the control signal is output to the gate of the target MOS tube through the operational amplifier unit, thereby controlling the conduction degree of the target MOS tube;

[0092] The second control module 230 is used to control the controllable switch corresponding to the target MOS tube to be turned on, so that the corresponding operational amplifier unit is a voltage follower. Due to the voltage dividing effect of the first resistor and the fifth resistor, the gate voltage of the control signal output to the target MOS tube through the operational amplifier unit cannot reach the threshold voltage, and the target MOS tube is disconnected.

[0093] In one embodiment of the present application, the control unit includes an MCU and a multi-way analog switch, the output end of the MCU is connected to the input end of the DAC, the multi-way analog switch has a control end, a plurality of first connection ends and a plurality of second connection ends, the output end of the MCU is connected to the control end of the multi-way analog switch, the plurality of first connection ends of the multi-way analog switch are all connected to the power supply end, and the second connection end of the multi-way analog switch is connected to the control end of at least one controllable switch;

[0094] The first control module comprises:

[0095] A first control submodule is used to control the target second connection end to be disconnected from the power supply end so that the controllable switch corresponding to the target MOS tube is disconnected, and the target second connection end is: a second connection end connected to the controllable switch corresponding to the target MOS tube;

[0096] The second control module includes:

[0097] The second control submodule is used to control the target second connection terminal to be connected to the power supply terminal so that the controllable switch corresponding to the target MOS tube is turned on.

[0098] The electronic load control device 200 provided in the embodiment of the present application can implement each process implemented by the above circuit embodiment and achieve the same beneficial effects. To avoid repetition, it will not be described again here.

[0099] In addition, an embodiment of the present application further provides an electronic load, including the above electronic load control circuit.

[0100] The electronic load provided in the embodiment of the present application can implement each process implemented in the above circuit embodiment and achieve the same beneficial effects. To avoid repetition, it will not be described again here.

[0101] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. An electronic load control circuit, characterized in that: A plurality of MOS tubes for controlling an electronic load, the circuit comprising: Control unit; DAC, the output end of the control unit is connected to the input end of the DAC, the control unit outputs a control signal through the DAC, and the control signal is used to control the conduction degree of the MOS tube; A plurality of operational amplifier units, wherein the plurality of operational amplifier units correspond to the plurality of MOS tubes, each of the operational amplifier units comprises an operational amplifier and a controllable switch, wherein the output end of the DAC is connected to the non-inverting input end of the operational amplifier through a first resistor, the inverting input end of the operational amplifier is grounded through a second resistor, the output end of the operational amplifier is correspondingly connected to the gate of the MOS tube, the source of the MOS tube is grounded through a third resistor, one end of the third resistor is connected to the inverting input end of the operational amplifier through a fourth resistor, the other end of the third resistor is connected to the non-inverting input end of the operational amplifier through a fifth resistor, the first connection end of the controllable switch is connected to the output end of the operational amplifier, the second connection end of the controllable switch is connected to the inverting input end of the operational amplifier, and the output end of the control unit is connected to the control end of the controllable switch; when the controllable switch is turned on, the maximum input voltage is less than the threshold voltage of the MOS tube, and the maximum input voltage is: the voltage input to the non-inverting input end of the operational amplifier after the preset maximum value of the control signal is divided by the first resistor and the fifth resistor.

2. The electronic load control circuit according to claim 1, characterized in that: The control unit comprises: MCU, the output end of the MCU is connected to the input end of the DAC; A multi-way analog switch, wherein the multi-way analog switch has a control end, multiple first connection ends and multiple second connection ends, the output end of the MCU is connected to the control end of the multi-way analog switch, the multiple first connection ends of the multi-way analog switch are all connected to the power supply end, and the second connection end of the multi-way analog switch is connected to the control end of at least one of the controllable switches.

3. The electronic load control circuit according to claim 1, characterized in that: Also includes: A capacitor, one end of the capacitor is connected to the output end of the operational amplifier, and the other end of the capacitor is connected to the inverting input end of the operational amplifier.

4. An electronic load control method, characterized in that: Applied to the electronic load control circuit as claimed in claim 1, the method comprises: Controlling the controllable switch corresponding to the target MOS tube to be disconnected, so that the corresponding operational amplifier unit is an error amplifier; Sending a control signal so that the control signal is output to the gate of the target MOS tube through the operational amplifier unit, thereby controlling the conduction degree of the target MOS tube; The controllable switch corresponding to the target MOS tube is controlled to be turned on, so that the corresponding operational amplifier unit is a voltage follower. Due to the voltage dividing effect of the first resistor and the fifth resistor, the gate voltage of the control signal output to the target MOS tube through the operational amplifier unit cannot reach the threshold voltage, and the target MOS tube is disconnected.

5. The electronic load control method according to claim 4, characterized in that: The control unit includes an MCU and a multi-way analog switch, the output end of the MCU is connected to the input end of the DAC, the multi-way analog switch has a control end, a plurality of first connection ends and a plurality of second connection ends, the output end of the MCU is connected to the control end of the multi-way analog switch, the plurality of first connection ends of the multi-way analog switch are all connected to the power supply end, and the second connection end of the multi-way analog switch is connected to the control end of at least one of the controllable switches; The controllable switch corresponding to the control target MOS tube is turned off, comprising: Control the target second connection end to be disconnected from the power supply end, so that the controllable switch corresponding to the target MOS tube is disconnected, and the target second connection end is: the second connection end connected to the controllable switch corresponding to the target MOS tube; The controlling a controllable switch corresponding to the target MOS tube to be turned on includes: The second connection terminal of the control target is connected to the power supply terminal so that the controllable switch corresponding to the target MOS tube is turned on.

6. An electronic device, characterized in that: include: at least one processor; at least one memory for storing at least one program; When at least one of the programs is executed by at least one of the processors, the electronic load control method according to any one of claims 4 to 5 is implemented.

7. A computer-readable storage medium, characterized in that: A program executable by a processor is stored therein, and when the program executable by the processor is executed by the processor, it is used to implement the electronic load control method as claimed in claim 4.

8. An electronic load control device, characterized in that: The electronic load control circuit as claimed in claim 1 comprises: A first control module, used for controlling the controllable switch corresponding to the target MOS tube to be disconnected, so that the corresponding operational amplifier unit is an error amplifier; A sending module, used for sending a control signal, so that the control signal is output to the gate of the target MOS tube through the operational amplifier unit, thereby controlling the conduction degree of the target MOS tube; The second control module is used to control the controllable switch corresponding to the target MOS tube to be turned on, so that the corresponding operational amplifier unit is a voltage follower. Due to the voltage dividing effect of the first resistor and the fifth resistor, the gate voltage of the control signal output to the target MOS tube through the operational amplifier unit cannot reach the threshold voltage, and the target MOS tube is disconnected.

9. The electronic load control device according to claim 8, characterized in that: The control unit includes an MCU and a multi-way analog switch, the output end of the MCU is connected to the input end of the DAC, the multi-way analog switch has a control end, a plurality of first connection ends and a plurality of second connection ends, the output end of the MCU is connected to the control end of the multi-way analog switch, the plurality of first connection ends of the multi-way analog switch are all connected to the power supply end, and the second connection end of the multi-way analog switch is connected to the control end of at least one of the controllable switches; The first control module comprises: A first control submodule, used for controlling the target second connection end to be disconnected from the power supply end, so that the controllable switch corresponding to the target MOS tube is disconnected, the target second connection end being: the second connection end connected to the controllable switch corresponding to the target MOS tube; The second control module comprises: The second control submodule is used to control the target second connection end to be connected to the power supply end so that the controllable switch corresponding to the target MOS tube is turned on.

10. An electronic load, characterized in that: The electronic load control circuit comprises the electronic load control circuit as claimed in any one of claims 1 to 3.

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