A switch optocoupler control circuit based on matrix instructions

Abstract

A switch optical coupler control circuit based on matrix instructions uses a two-stage optical coupler combination control. The first-stage optical coupler control uses a switch matrix instruction at the front end of an optical coupler relay. The switch matrix instruction can realize the logical operation of multiple signals and control the state of the output signal according to the operation result; the second-stage optical coupler control outputs a control signal control to control the matrix instruction switch optical coupler control circuit through the main power circuit. When it is detected that the main power circuit is not working properly, it requests to start the switch matrix instruction again. If the main power circuit still is not working properly, the circuit is turned off by the control control signal to perform fault detection; when it is detected that the main power circuit is working properly, the circuit continues to be opened to ensure the normal operation of the system. By using the two-stage optical coupler combination control, the present invention can not only detect whether the system is working properly, but also send the switch matrix instruction to the optical coupler relay multiple times, thereby improving the reliability of the system.

Description

Technical Field

[0001] The invention belongs to the technical field of secondary power supplies, and in particular relates to a switch optocoupler control circuit based on matrix instructions. Background Art

[0002] With the development of the power supply industry, the requirements for the reliability, small size, high frequency and high efficiency of secondary power supplies are getting higher and higher. The traditional on-off control uses electromagnetic relays, which are large in size and weight, and the number of switching times is limited. Optocoupler relays are gradually being used to replace them. However, the traditional optocoupler control circuit uses a single-stage control. Once the optocoupler relay is not turned on, it will cause the system to paralyze. The invention patent with publication number CN107070440B discloses an optocoupler isolation pulse command power electronic switching circuit, which is mainly composed of an optocoupler circuit, an operational amplifier circuit and a surge current suppression circuit. The optocoupler circuit directly controls the on-off of the system. Once the optocoupler relay is not turned on or fails, it will directly affect the paralysis of the entire system circuit. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a switch optocoupler control circuit based on matrix instructions. By using a voltage sampling circuit, a voltage comparison circuit and a control circuit at the output end of the main power circuit, the output end voltage is collected and compared with the input end voltage to judge whether the circuit is working normally, and a control signal control is output. Then, a two-stage optocoupler combination control is used for the matrix instruction switch optocoupler control circuit. The first-stage optocoupler control uses the switch matrix instruction at the front end of the optocoupler relay. The switch matrix instruction can realize the logical operation of multiple signals and control the state of the output signal according to the result. The second-stage optocoupler control controls the matrix instruction switch optocoupler control circuit through the main power circuit output control signal control. If it is detected that the main power circuit is not working properly, it requests to start the switch matrix instruction again. If the main power circuit is still not working properly, the circuit is shut down through the control signal control to perform fault detection; if it is detected that the main power circuit is working properly, the circuit continues to be opened to ensure the normal operation of the system.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a matrix instruction based on-off optocoupler control circuit, including a DC-DC circuit, an undervoltage protection circuit, a voltage sampling circuit, a voltage comparison circuit, a control circuit, a matrix instruction on-off optocoupler control circuit, resistors R1-R7, a diode D1, voltage regulator tubes D2-D3, capacitors C1-C2, transistors Q1-Q2 and a MOS tube V1.

[0006] The undervoltage protection circuit is connected to the input end of the DC-DC circuit, one end of the resistor R1 is connected to the undervoltage protection circuit, and the other end is connected to the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to the negative electrode of the voltage regulator D2, the positive electrode of the voltage regulator D2 is connected to one end of the capacitor C1, and the other end of the capacitor C1 is grounded after passing through the capacitor C2.

[0007] One end of the resistor R2 is connected to the Vin+ end of the external power supply circuit, and the other end is connected to the resistor R3 and one end of the resistor R4. The other end of the resistor R3 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to one end of the resistor R2, the collector of the transistor Q1 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the positive electrode of the voltage regulator D3, the negative electrode of the voltage regulator D3 is connected to one end of the resistor R2, one end of the resistor R4 is connected to the other end of the resistor R2, the other end of the resistor R4 is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the capacitor C1, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the other end of the resistor R4, one end of the resistor R7 is connected to the positive electrode of the voltage regulator D3, and the other end is grounded; the source of the MOS tube V1 is connected to the negative electrode of the voltage regulator D3, the gate is connected to the positive electrode of the voltage regulator D3, and the drain is connected to the non-phase input end of the DC-DC circuit;

[0008] The voltage sampling circuit is connected to the output end of the DC-DC circuit, the voltage comparison circuit is connected to the voltage sampling circuit to obtain the voltage sampling signal, the control circuit is connected to the voltage comparison circuit, obtains the voltage comparison signal, and outputs the control signal control; the matrix instruction switch optical coupling control circuit includes a switch matrix instruction circuit, a two-stage optical coupling combination control circuit and an operational amplifier circuit, the switch matrix instruction circuit includes a power-on matrix instruction, a power-off matrix instruction, diodes D4, D9, resistors R11, R17, capacitors C3, capacitors C4, and resistors R5, R6, and capacitors C7, C8, and C9. Capacitor C6 and capacitor C7; the two-stage optocoupler combination control circuit includes optocouplers U1~U4, diodes D6~D8, diodes D11~D13, voltage regulators D5 and D10, resistors R12~R16, resistors R18~R21, transistors Q3 and Q4, capacitors C5 and C8, and the optocouplers U1~U4 are all GH302R photoelectric couplers; the operational amplifier circuit includes resistors R22~R33, diodes D14 and D15, voltage regulators D16 and D17, capacitors C9~C13, transistors Q5 and Q6, and operational amplifier U1B;

[0009] The positive electrode of the diode D4 is connected to the power-on matrix instruction, the negative electrode is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the negative electrode of the voltage regulator tube D5 and one end of the capacitor C3, the other end of the capacitor C3 is connected to the power-on matrix instruction through the capacitor C4, the positive electrode of the diode D9 is connected to the power-off matrix instruction, the negative electrode is connected to one end of the resistor R17, the other end of the resistor R17 is connected to the negative electrode of the voltage regulator tube D10 and one end of the capacitor C6, the other end of the capacitor C6 is connected to the power-on matrix instruction through the capacitor C7;

[0010] The positive electrode of the voltage regulator tube D5 is connected to the first pin of the optocoupler U1 and the negative electrode of the diode D6, the positive electrode of the diode D6 is connected to the second pin of the optocoupler U1, the second pin of the optocoupler U1 is connected to the power-on matrix instruction, the fifth pin of the optocoupler U1 is connected to one end of the resistor R15, the other end of the resistor R15 is connected to the positive electrode of the power supply, the fourth pin of the optocoupler U1 is connected to the positive electrode of the diode D7, the negative electrode of the diode D7 is connected to the fifth pin of the optocoupler U2, the fourth pin of the optocoupler U2 is connected to one end of the resistor R14 and the positive electrode of the diode D8, the first pin of the optocoupler U2 is connected to the resistors R12, R13 and one end of the capacitor C5, the other end of the resistor R12 is connected to the control signal control, the second pin of the optocoupler U2, the other end of the resistor R13 and the other end of the capacitor C5 are grounded;

[0011] The positive electrode of the voltage regulator tube D10 is connected to the first pin of the optocoupler U3 and the negative electrode of the diode D11, the positive electrode of the diode D11 is connected to the second pin of the optocoupler U3, the second pin of the optocoupler U3 is connected to the shutdown matrix instruction, the fifth pin of the optocoupler U3 is connected to one end of the resistor R18, the other end of the resistor R18 is connected to the positive electrode of the power supply, the fourth pin of the optocoupler U3 is connected to the positive electrode of the diode D12, the negative electrode of the diode D12 is connected to the fifth pin of the optocoupler U4, the fourth pin of the optocoupler U4 is connected to one end of the resistor R21 and the positive electrode of the diode D13, the first pin of the optocoupler U4 is connected to the resistors R19, R20 and one end of the capacitor C8, the other end of the resistor R20 is connected to the control signal control, the second pin of the optocoupler U4, the other end of the resistor R19 and the other end of the capacitor C8 are grounded;

[0012] The cathode of the diode D8 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to one end of the resistor R16, the other end of the resistor R16 and one end of the resistor R26 are connected to the inverting input end of the operational amplifier U1B, one end of the capacitor C11 and the other end of the resistor R24, one end of the resistor R24 ​​is connected to the positive electrode of the power supply; the collector of the transistor Q4 is connected to one end of the resistor R22, the other end of the resistor R22 is connected to the non-inverting input end of the operational amplifier U1B, one end of the capacitor C9, one end of the resistor R25, one end of the resistor R28 and the positive electrode of the transistor Q5. The collector is connected, one end of the resistor R23 is connected to the positive electrode of the power supply, and the other end of the resistor R23 is connected to the non-inverting input terminal of the operational amplifier U1B; the other end of the capacitor C9 is connected to one end of the capacitor C10, and the other end of the capacitor C11 is connected to one end of the capacitor C12; the emitter of the transistor Q3, the emitter of the transistor Q4, the other end of the resistor R14, the other end of the resistor R21, the other end of the capacitor C10, the other end of the resistor R25, the other end of the capacitor C12, the other end of the resistor R26, the other end of the resistor R27 and the emitter of the transistor Q5 are grounded;

[0013] The base of the transistor Q5 is connected to one end of the resistor R27, one end of the resistor R30 and one end of the capacitor C13, and the other end of the resistor R30 and the other end of the capacitor C13 are connected to the MS-end; the other end of the resistor R28 is connected to the cathode of the diode D14, the output end of the operational amplifier U1B is connected to the anode of the diode D14 and one end of the resistor R29, the other end of the resistor R29 is connected to the anode of the diode D15, the cathode of the diode D15 is connected to the cathode of the voltage-stabilizing tube D16, the anode of the voltage-stabilizing tube D16 is connected to one end of the resistor R31 and the base of the transistor Q6, the other end of the resistor R31 is grounded to the emitter of the transistor Q6, the collector of the transistor Q6 is connected to one end of the resistor R32 and one end of the resistor R33, the other end of the resistor R32 is connected to the anode of the power supply, the other end of the resistor R33 is connected to the cathode of the voltage-stabilizing tube D17, and the anode of the voltage-stabilizing tube D17 is connected to the MS+ end;

[0014] The MS+ terminal is connected to the positive electrode of the voltage regulator tube D2, and the MS- terminal is connected to the positive electrode of the diode D1.

[0015] Furthermore, it also includes a surge suppression circuit, which is arranged between the source of the MOS tube V1 and the positive electrode of the voltage regulator tube D3.

[0016] Furthermore, the voltage comparison circuit includes resistors R8~R10 and an operational amplifier N1B, the non-phase input terminal of the operational amplifier N1B is connected to one end of the resistor R8 and one end of the resistor R9, the reverse input terminal is connected to the voltage sampling circuit, the output terminal of the operational amplifier N1B is connected to one end of the resistor R10 and the control circuit; the other end of the resistor R8 and the fourth pin of the operational amplifier N1B are grounded, and the other end of the resistor R9, the other end of the resistor R10 and the third pin of the operational amplifier N1B are connected to the reference voltage Vref.

[0017] Furthermore, it also includes an internal auxiliary power supply, wherein the positive electrode of the internal auxiliary power supply is connected to one end of the resistor R2, and the negative electrode is grounded.

[0018] Furthermore, it also includes a fuse protection circuit, wherein the input end of the fuse protection circuit is connected to the Vin+ end of the external power supply circuit, and the output end is connected to one end of the resistor R2.

[0019] Furthermore, it also includes an EM filter circuit arranged at the input end of the DC-DC circuit, one end of the EM filter circuit is grounded, and the other end is connected to the positive electrode of the input end of the DC-DC circuit.

[0020] Furthermore, it also includes an EM filter circuit arranged at the output end of the DC-DC circuit, one end of the EM filter circuit is connected to the positive electrode of the output end of the DC-DC circuit, and the other end is connected to the negative electrode of the output end of the DC-DC circuit.

[0021] Furthermore, it also includes a satellite-borne circuit arranged at the output end of the DC-DC circuit.

[0022] The beneficial effects of the present invention are as follows: the present invention uses a two-stage optocoupler combination control, and the first-stage optocoupler control uses a switch matrix instruction at the front end of the optocoupler relay. The switch matrix instruction can realize the logical operation of multiple signals and control the state of the output signal according to the result. The technical solution of the present invention can send the switch matrix instruction to the optocoupler relay multiple times, thereby improving the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a main power circuit block diagram of the matrix instruction switch optocoupler control circuit of the present invention;

[0024] Figure 2 The invention discloses a matrix instruction switch optocoupler control circuit. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0026] like Figure 1As shown, a matrix-command-based switch optocoupler control circuit includes a main power circuit based on a matrix-command switch optocoupler control circuit and a matrix-command switch optocoupler control circuit. Figure 1 As shown, it is characterized by comprising a fuse protection circuit, an internal auxiliary power supply, an undervoltage protection circuit, a matrix command switch optical coupling control circuit, a surge suppression circuit, an EMI filter circuit, a DC-DC circuit, a satellite, a voltage comparison circuit, a diode, two voltage regulators, seven resistors, two capacitors, two transistors and a MOS tube. The transistor plays a role in pulling down the voltage, and the voltage is pulled down and connected to the matrix command switch optical coupling control circuit. The voltage comparison circuit comprises a comparator, three resistors, two ground terminals GND, and a reference terminal voltage Vref. By comparing the reference voltage Vref with the output terminal voltage Vo, it is determined whether the voltage is working normally.

[0027] The matrix instruction switch optocoupler control circuit is as follows: Figure 2 As shown, it includes a switch matrix command circuit, a two-stage optocoupler combination control circuit and an operational amplifier circuit, and then connected to the main power circuit through MS+ and MS- to control the operation of the MOS tube control system of the main power circuit. The switch matrix command circuit includes a power-on matrix command, a power-off matrix command, 2 diodes, 2 resistors, and 4 capacitors. The switch matrix command inputs the switch signal, and the signal is filtered through the resistor and capacitor, and the filtered signal is input to the two-stage optocoupler combination control circuit. The two-stage optocoupler combination control circuit includes 2 voltage regulator tubes, 6 diodes, 4 optocoupler relays, 9 resistors, 2 capacitors, 2 triodes, 2 ground terminals GND, 2 control terminals control, and 2 auxiliary power input terminals +12V1. The first-stage optocoupler control inputs the filtered switch matrix command at the front end of the optocoupler relay. The switch matrix command can realize the logical operation of multiple signals and control the state of the output signal according to the operation result. The secondary optocoupler control controls the matrix command switch optocoupler control circuit through the main power circuit output control signal control. If it is detected that the main power circuit is not working properly, it requests to restart the switch matrix command. If the main power circuit is still not working properly, the circuit is shut down through the control signal to perform fault detection; if it is detected that the main power circuit is working properly, the circuit continues to be turned on to ensure the normal operation of the system. A transistor is added to the rear end of the optocoupler relay to reduce the driving current of the command output end. The operational amplifier circuit includes 12 resistors, 5 capacitors, 2 diodes, 2 voltage regulator tubes, 1 comparator, 1 auxiliary power input terminal +12V1, and 1 ground terminal GND.

[0028] 1) When the switching matrix instruction circuit does not issue any instructions, the voltages at the non-inverting input terminal V5 and the inverting input terminal V6 of the operational amplifier U1B are obtained by dividing the +12V1 voltage through the resistors R23 and R24. At this time, the voltage at the non-inverting input terminal V5 is 4V, which is lower than the voltage at the inverting input terminal V6 by 6V, that is, V5 < V6, and the operational amplifier outputs a low level, controlling the MOS transistor V1 in the main power circuit to turn off, and the power supply module shuts down.

[0029] 2) When the switching matrix instruction circuit issues a turn-on matrix instruction, the optocoupler U1 conducts, thereby causing the triode Q3 to conduct, pulling down the voltage at the inverting input terminal V6 of the operational amplifier to 0.7V, which is lower than the voltage at the non-inverting input terminal 4V, that is, the operational amplifier outputs a high level of 11V, controlling the MOS transistor V1 in the main power circuit to conduct, and realizing the power-on of the power supply module. At the same time, the high level is fed back to the non-inverting input terminal. When the pulse signal of the matrix instruction disappears, the voltage at the inverting input terminal of the operational amplifier returns to 6V, but the non-inverting input terminal of the operational amplifier still maintains a high level of 8.6V, so that the system remains in the power-on state all the time;

[0030] 3) When the switching matrix instruction circuit issues a turn-off matrix instruction, the optocoupler U3 conducts, and the triode Q4 conducts, pulling the voltage at the non-inverting input terminal of the operational amplifier to about 2.16V, which is lower than the voltage at the inverting input terminal 6V, so that the operational amplifier outputs a low level, controlling the MOS transistor V1 in the main power circuit to turn off, realizing the shutdown of the power supply module, and the voltage at the non-inverting input terminal returns to 4V, and the voltage at the inverting input terminal returns to 6V.

[0031] The function of the fuse protection circuit is: when a short circuit occurs inside the secondary power supply, the fuse is blown to avoid causing a short circuit of the primary busbar and affecting the normal operation of the entire system; the internal auxiliary power supply mainly supplies power to the under-voltage protection circuit and the matrix instruction circuit; the under-voltage protection circuit includes an operational amplifier. When the busbar is in an under-voltage state, the voltage at the inverting input terminal is lower than the voltage at the non-inverting input terminal, causing the operational amplifier to output a high level, controlling the MOS transistor to turn off, realizing the under-voltage protection function of the power supply module. At the same time, through this signal, the voltage at the non-inverting input terminal of the operational amplifier in the switching matrix circuit is controlled to become lower, so that the operational amplifier returns to the state of outputting a low level, realizing the function that after the busbar voltage returns from the under-voltage state to the normal state, the secondary power supply needs to be given a turn-on instruction by the switching matrix instruction circuit before it can be powered on again.

[0032] The surge suppression circuit includes a capacitor, which suppresses the peak current by charging the capacitor at the moment of system startup.

[0033] The EMI filter circuit is a low-pass filter circuit composed of common-mode inductors, differential-mode inductors and capacitors. It allows DC and low-frequency pulse currents to pass through, and suppresses high-frequency noise interference. Its function is to prevent the electromagnetic interference generated by the secondary power supply from entering the primary bus, and at the same time prevent the interference on the primary bus from entering the secondary power supply, affecting the normal operation of the secondary power supply, thereby improving the EMC performance of the secondary power supply. The DC-DC circuit is the main working module of the system step-up and step-down.

Claims

1. A switch optocoupler control circuit based on matrix instructions, characterized in that: It includes DC-DC circuit, undervoltage protection circuit, voltage sampling circuit, voltage comparison circuit, control circuit, matrix command switch optocoupler control circuit, resistors R1~R7, diode D1, voltage regulator tube D2~D3, capacitors C1~C2, transistors Q1~Q2 and MOS tube V1. The undervoltage protection circuit is connected to the input end of the DC-DC circuit, one end of the resistor R1 is connected to the undervoltage protection circuit, and the other end is connected to the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to the negative electrode of the voltage regulator D2, the positive electrode of the voltage regulator D2 is connected to one end of the capacitor C1, and the other end of the capacitor C1 is grounded after passing through the capacitor C2. One end of the resistor R2 is connected to the Vin+ end of the external power supply circuit, and the other end is connected to the resistor R3 and one end of the resistor R4. The other end of the resistor R3 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to one end of the resistor R2, the collector of the transistor Q1 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the positive electrode of the voltage regulator D3, the negative electrode of the voltage regulator D3 is connected to one end of the resistor R2, one end of the resistor R4 is connected to the other end of the resistor R2, the other end of the resistor R4 is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the capacitor C1, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the other end of the resistor R4, one end of the resistor R7 is connected to the positive electrode of the voltage regulator D3, and the other end is grounded; the source of the MOS tube V1 is connected to the negative electrode of the voltage regulator D3, the gate is connected to the positive electrode of the voltage regulator D3, and the drain is connected to the non-phase input end of the DC-DC circuit; The voltage sampling circuit is connected to the output end of the DC-DC circuit, the voltage comparison circuit is connected to the voltage sampling circuit to obtain the voltage sampling signal, the control circuit is connected to the voltage comparison circuit, obtains the voltage comparison signal, and outputs the control signal control; the matrix instruction switch optical coupling control circuit includes a switch matrix instruction circuit, a two-stage optical coupling combination control circuit and an operational amplifier circuit, the switch matrix instruction circuit includes a power-on matrix instruction, a power-off matrix instruction, diodes D4, D9, resistors R11, R17, capacitors C3, capacitors C4, and resistors R5, R6, and capacitors C7, C8, and C9. Capacitor C6 and capacitor C7; the two-stage optocoupler combination control circuit includes optocouplers U1~U4, diodes D6~D8, diodes D11~D13, voltage regulators D5 and D10, resistors R12~R16, resistors R18~R21, transistors Q3 and Q4, capacitors C5 and C8, and the optocouplers U1~U4 are all GH302R photoelectric couplers; the operational amplifier circuit includes resistors R22~R33, diodes D14 and D15, voltage regulators D16 and D17, capacitors C9~C13, transistors Q5 and Q6, and operational amplifier U1B; The positive electrode of the diode D4 is connected to the power-on matrix instruction, the negative electrode is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the negative electrode of the voltage regulator tube D5 and one end of the capacitor C3, the other end of the capacitor C3 is connected to the power-on matrix instruction through the capacitor C4, the positive electrode of the diode D9 is connected to the power-off matrix instruction, the negative electrode is connected to one end of the resistor R17, the other end of the resistor R17 is connected to the negative electrode of the voltage regulator tube D10 and one end of the capacitor C6, the other end of the capacitor C6 is connected to the power-on matrix instruction through the capacitor C7; The positive electrode of the voltage regulator tube D5 is connected to the first pin of the optocoupler U1 and the negative electrode of the diode D6, the positive electrode of the diode D6 is connected to the second pin of the optocoupler U1, the second pin of the optocoupler U1 is connected to the power-on matrix instruction, the fifth pin of the optocoupler U1 is connected to one end of the resistor R15, the other end of the resistor R15 is connected to the positive electrode of the power supply, the fourth pin of the optocoupler U1 is connected to the positive electrode of the diode D7, the negative electrode of the diode D7 is connected to the fifth pin of the optocoupler U2, the fourth pin of the optocoupler U2 is connected to one end of the resistor R14 and the positive electrode of the diode D8, the first pin of the optocoupler U2 is connected to the resistors R12, R13 and one end of the capacitor C5, the other end of the resistor R12 is connected to the control signal control, the second pin of the optocoupler U2, the other end of the resistor R13 and the other end of the capacitor C5 are grounded; The positive electrode of the voltage regulator tube D10 is connected to the first pin of the optocoupler U3 and the negative electrode of the diode D11, the positive electrode of the diode D11 is connected to the second pin of the optocoupler U3, the second pin of the optocoupler U3 is connected to the shutdown matrix instruction, the fifth pin of the optocoupler U3 is connected to one end of the resistor R18, the other end of the resistor R18 is connected to the positive electrode of the power supply, the fourth pin of the optocoupler U3 is connected to the positive electrode of the diode D12, the negative electrode of the diode D12 is connected to the fifth pin of the optocoupler U4, the fourth pin of the optocoupler U4 is connected to one end of the resistor R21 and the positive electrode of the diode D13, the first pin of the optocoupler U4 is connected to the resistors R19, R20 and one end of the capacitor C8, the other end of the resistor R20 is connected to the control signal control, the second pin of the optocoupler U4, the other end of the resistor R19 and the other end of the capacitor C8 are grounded; The cathode of the diode D8 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to one end of the resistor R16, the other end of the resistor R16 and one end of the resistor R26 are connected to the inverting input end of the operational amplifier U1B, one end of the capacitor C11 and the other end of the resistor R24, one end of the resistor R24 ​​is connected to the positive electrode of the power supply; the collector of the transistor Q4 is connected to one end of the resistor R22, the other end of the resistor R22 is connected to the non-inverting input end of the operational amplifier U1B, one end of the capacitor C9, one end of the resistor R25, one end of the resistor R28 and the positive electrode of the transistor Q5. The collector is connected, one end of the resistor R23 is connected to the positive electrode of the power supply, and the other end of the resistor R23 is connected to the non-inverting input terminal of the operational amplifier U1B; the other end of the capacitor C9 is connected to one end of the capacitor C10, and the other end of the capacitor C11 is connected to one end of the capacitor C12; the emitter of the transistor Q3, the emitter of the transistor Q4, the other end of the resistor R14, the other end of the resistor R21, the other end of the capacitor C10, the other end of the resistor R25, the other end of the capacitor C12, the other end of the resistor R26, the other end of the resistor R27 and the emitter of the transistor Q5 are grounded; The base of the transistor Q5 is connected to one end of the resistor R27, one end of the resistor R30 and one end of the capacitor C13, and the other end of the resistor R30 and the other end of the capacitor C13 are connected to the MS-end; the other end of the resistor R28 is connected to the cathode of the diode D14, the output end of the operational amplifier U1B is connected to the anode of the diode D14 and one end of the resistor R29, the other end of the resistor R29 is connected to the anode of the diode D15, the cathode of the diode D15 is connected to the cathode of the voltage-stabilizing tube D16, the anode of the voltage-stabilizing tube D16 is connected to one end of the resistor R31 and the base of the transistor Q6, the other end of the resistor R31 is grounded to the emitter of the transistor Q6, the collector of the transistor Q6 is connected to one end of the resistor R32 and one end of the resistor R33, the other end of the resistor R32 is connected to the anode of the power supply, the other end of the resistor R33 is connected to the cathode of the voltage-stabilizing tube D17, and the anode of the voltage-stabilizing tube D17 is connected to the MS+ end; The MS+ terminal is connected to the positive electrode of the voltage regulator tube D2, and the MS- terminal is connected to the positive electrode of the diode D1.

2. The on / off optocoupler control circuit based on matrix instructions as claimed in claim 1, characterized in that: It also includes a surge suppression circuit, which is arranged between the source of the MOS tube V1 and the positive electrode of the voltage regulator tube D3.

3. The on / off optocoupler control circuit based on matrix instructions as claimed in claim 1, characterized in that: The voltage comparison circuit includes resistors R8~R10 and an operational amplifier N1B, the non-phase input terminal of the operational amplifier N1B is connected to one end of the resistor R8 and one end of the resistor R9, the reverse input terminal is connected to the voltage sampling circuit, the output terminal of the operational amplifier N1B is connected to one end of the resistor R10 and the control circuit; the other end of the resistor R8 and the fourth pin of the operational amplifier N1B are grounded, and the other end of the resistor R9, the other end of the resistor R10 and the third pin of the operational amplifier N1B are connected to the reference voltage Vref.

4. The on / off optocoupler control circuit based on matrix instructions as claimed in claim 1, characterized in that: It also includes an internal auxiliary power supply, wherein the positive electrode of the internal auxiliary power supply is connected to one end of the resistor R2, and the negative electrode is grounded.

5. The on / off optocoupler control circuit based on matrix instructions as claimed in claim 1, characterized in that: It also includes a fuse protection circuit, wherein the input end of the fuse protection circuit is connected to the Vin+ end of the external power supply circuit, and the output end is connected to one end of the resistor R2.

6. The on / off optocoupler control circuit based on matrix instructions as claimed in claim 1, characterized in that: It also includes an EM filter circuit arranged at the input end of the DC-DC circuit, one end of the EM filter circuit is grounded, and the other end is connected to the positive pole of the input end of the DC-DC circuit.

7. The on / off optocoupler control circuit based on matrix instructions as claimed in claim 1, characterized in that: It also includes an EM filter circuit arranged at the output end of the DC-DC circuit, one end of the EM filter circuit is connected to the positive electrode of the output end of the DC-DC circuit, and the other end is connected to the negative electrode of the output end of the DC-DC circuit.

8. The on / off optocoupler control circuit based on matrix instructions as claimed in claim 1, characterized in that: The invention also comprises a satellite-borne circuit arranged at the output end of the DC-DC circuit.

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