A LED control circuit for DC circuit breaker controller

Abstract

The present invention relates to an LED control circuit for a DC circuit breaker controller, comprising a reset unit, wherein the output end of the reset unit is connected to the reset end of a decoding unit, the signal input end of the decoding unit receives a latch signal and an indication signal output by the DC circuit breaker controller, the signal output end of the decoding unit is connected to the signal input end of an LED indication unit, and the output end of the LED indication unit is divided into two paths, one path is connected to the signal input end of a power supply unit, and the other path is connected to a reset button K1 in the reset unit; the power supply unit comprises a system power supply and a battery. The present invention can still provide signal indication when the system power supply is powered off, uses a battery for power backup, and realizes LED indication reset at the same time. The method is simple and low in cost, and overcomes the influence of the system power supply power off on the signal indication of a low-voltage electrical appliance or controller, so that when the system power supply is powered off, the operator can still obtain the indication status information of the low-voltage electrical appliance or controller.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to an LED control circuit used in a DC circuit breaker controller. Background Art

[0002] In the field of low-voltage electrical appliances, especially in low-voltage electrical appliance controllers, LEDs are widely used to indicate the functions and operating status of the equipment, so that users can easily obtain equipment information. In low-voltage electrical appliances and / or controllers, a group of LEDs are usually used for signal indication, where each individual LED identifies a specific information, or is combined with other LEDs to indicate certain specific information. The use of LED combinations for signal indication can not only enrich the indication content and provide accurate information, but also has low cost and simple circuit design.

[0003] LED indication circuits are usually integrated into low-voltage electrical appliances and / or controllers in the form of functional modules and are powered by the system power supply of the low-voltage electrical appliances and / or controllers. When the system power fails, the LED indication circuit cannot realize the signal indication function, so that the customer cannot obtain the status information of the controller before the power failure when the system power fails. Summary of the invention

[0004] The object of the present invention is to provide an LED control circuit for a DC circuit breaker controller which can maintain a signal indication state when the system power is off, so that a user can easily know the operating state of a low-voltage electrical appliance or controller before power failure.

[0005] To achieve the above object, the present invention adopts the following technical solution: an LED control circuit for a DC circuit breaker controller, comprising:

[0006] A reset unit, used for resetting the state of the LED light that is kept on;

[0007] A decoding unit, used to control the corresponding LED lamp in the LED indication unit to light up;

[0008] LED indication unit, used for indicating the lighting of LED lamp;

[0009] A power supply unit, used to supply power to the decoding unit, the reset unit, and the LED indication unit respectively;

[0010] The output end of the reset unit is connected to the reset end of the decoding unit, the signal input end of the decoding unit receives the latch signal and the indication signal output by the DC circuit breaker controller, the signal output end of the decoding unit is connected to the signal input end of the LED indication unit, the output end of the LED indication unit is divided into two paths, one is connected to the signal input end of the power supply unit, and the other is connected to the reset button K1 in the reset unit; the power supply unit includes a system power supply VCC and a battery VBAT.

[0011] The decoding unit includes a decoding chip, a latch control signal input circuit and an indication signal input circuit. The decoding chip includes a chip U1. The chip U1 adopts a 3-8 decoder. The latch control signal input circuit includes a diode D1, whose anode receives the latch signal output by the DC circuit breaker controller, and whose cathode is respectively connected to one end of the resistor R1 and the gate of the MOS tube Q1. The source of the MOS tube Q1 is connected to the other end of the resistor R1 and then to the ground. The drain of the MOS tube Q1 is connected to the 4th pin of the chip U1. The indication signal input circuit is composed of diodes D2, D3, D4 and resistors R3, R4, R5. The anodes of the diodes D2, D3, and D4 are all connected to the indication signal output by the DC circuit breaker controller, the cathode of the diode D2 is respectively connected to one end of the resistor R5 and the pin 1 of the chip U1, the cathode of the diode D3 is respectively connected to one end of the resistor R4 and the pin 2 of the chip U1, the cathode of the diode D4 is respectively connected to one end of the resistor R3 and the pin 3 of the chip U1, and the other ends of the resistors R3, R4, and R5 are connected to a common ground; the pin 4 of the chip U1 is connected to the output end of the reset unit, the pins 5 and 8 of the chip U1 are grounded, and the pins 11, 10, 9, and 7 of the chip U1 are connected to the signal input end of the LED indication unit.

[0012] The LED indication unit includes an indication signal judgment circuit and an indication circuit. The indication signal judgment circuit is composed of diodes D5, D6, D7, and D8. The indication circuit is composed of diodes D9, D10, D11, D12, D13, D14, D15, and D16, resistors R6, R7, R8, and R9, and light-emitting diodes LED1, LED2, LED3, and LED4. The anode of the diode D5 is respectively connected to the signal output end of the decoding unit and the anode of the diode D9, the anode of the diode D6 is respectively connected to the signal output end of the decoding unit and the anode of the diode D11, the anode of the diode D7 is respectively connected to the signal output end of the decoding unit and the anode of the diode D13, the anode of the diode D8 is respectively connected to the signal output end of the decoding unit and the anode of the diode D15, and the diodes D5, D6, D7, The cathode of D8 is connected in parallel and then connected to the signal input end of the power supply unit, the cathode of the diode D9 is respectively connected to one end of the resistor R6 and the cathode of the diode D10, the cathode of the diode D11 is respectively connected to one end of the resistor R7 and the cathode of the diode D12, the cathode of the diode D13 is respectively connected to one end of the resistor R8 and the cathode of the diode D14, the cathode of the diode D15 is respectively connected to one end of the resistor R9 and the cathode of the diode D16, the anodes of the diodes D10, D12, D14, and D16 are connected in parallel and then connected to one end of the reset button K1, the other end of the reset button K1 is connected to the power supply VBAT1, the other ends of the resistors R6, R7, R8, and R9 are respectively connected to the anodes of the light-emitting diodes LED1, LED2, LED3, and LED4 in a one-to-one correspondence, and the cathodes of the light-emitting diodes LED1, LED2, LED3, and LED4 are grounded in common.

[0013] The reset unit is composed of a reset button K1, a resistor R12, a voltage-stabilizing diode Z1, a resistor R10, a resistor R11 and a comparator U2. One end of the reset button K1 is connected to a power supply VBAT1, and the other end is respectively connected to one end of the resistor R12 and one end of the resistor R11. The other end of the resistor R12 is grounded. The other end of the resistor R11 is connected to a positive input end of the comparator U2. The inverting input end of the comparator U2 is respectively connected to one end of the resistor R10 and a cathode of the voltage-stabilizing diode Z1. The anode of the voltage-stabilizing diode Z1 is grounded. The other end of the resistor R10 and the four pins of the comparator U2 are all connected to a power supply V1.

[0014] The power supply unit includes resistors R13, R14, R15, diodes D17, D18, and transistors Q2 and Q3. One end of the resistor R13 is connected to the output end of the LED indication unit as the signal input end of the power supply unit, the other end of the resistor R13 is connected to the base of the transistor Q2, the collector of the transistor Q2 is respectively connected to one end of the resistors R14 and R15, the emitter of the transistor Q2 is grounded, the other end of the resistor R14 is respectively connected to the emitter of the transistor Q3 and the cathode of the diode D18, the other end of the resistor R15 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to the cathode of the diode D17, the anode of the diode D17 is connected to the system power supply VCC, and the anode of the diode D18 is connected to the battery VBAT.

[0015] It can be seen from the above technical scheme that the beneficial effects of the present invention are: first, the present invention can still provide signal indication when the system power supply VCC is powered off, and the LED control circuit in the DC circuit breaker controller uses a battery for power backup, and realizes LED indication reset at the same time. The method is simple and low-cost, and overcomes the influence of the power failure of the system power supply VCC on the signal indication of the low-voltage electrical appliance or controller, so that when the system power supply VCC is powered off, the operator can still obtain the indication status information of the low-voltage electrical appliance or controller; second, the circuit can decide whether to turn on the battery power supply according to the LED indication status, use the battery reasonably, save battery power, and thus increase the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a circuit principle block diagram of the present invention;

[0017] Figure 2 , 3 , 4, and 5 are Figure 1 Circuit schematic diagram of the decoding unit, LED indication unit, reset unit, and power supply unit. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, an LED control circuit for a DC circuit breaker controller includes:

[0019] A reset unit, used for resetting the state of the LED light that is kept on;

[0020] A decoding unit, used to control the corresponding LED lamp in the LED indication unit to light up;

[0021] LED indication unit, used for indicating the lighting of LED lamp;

[0022] A power supply unit, used to supply power to the decoding unit, the reset unit, and the LED indication unit respectively;

[0023] The output end of the reset unit is connected to the reset end of the decoding unit, the signal input end of the decoding unit receives the latch signal and the indication signal output by the DC circuit breaker controller, the signal output end of the decoding unit is connected to the signal input end of the LED indication unit, the output end of the LED indication unit is divided into two paths, one is connected to the signal input end of the power supply unit, and the other is connected to the reset button K1 in the reset unit; the power supply unit includes a system power supply VCC and a battery VBAT.

[0024] like Figure 2 As shown, the decoding unit includes a decoding chip 21, a latch control signal input circuit 22 and an indication signal input circuit 23. The decoding chip 21 includes a chip U1. The chip U1 adopts a 3-8 decoder. The 3-8 decoder is used to select which of the LED drive signals L1, L2, L3, and L4 outputs a high level, and then correspondingly selects which of the light-emitting diodes LED1, LED2, LED3, and LED4 to light up. The latch control signal input circuit 22 includes a diode D1, whose anode receives the latch signal output by the DC circuit breaker controller, and whose cathode is respectively connected to one end of the resistor R1 and the gate of the MOS tube Q1. The source of the MOS tube Q1 is connected to the other end of the resistor R1 and then grounded, and the drain of the MOS tube Q1 is connected to the 4th pin of the chip U1; the indication signal input circuit 23 is composed of diodes D2, D3, and D4 and resistors R3, R4, and R5. The anodes of the diodes D2, D3, and D4 are all connected to the DC circuit breaker controller. The output indication signal, the cathode of the diode D2 is respectively connected to one end of the resistor R5 and the pin 1 of the chip U1, the cathode of the diode D3 is respectively connected to one end of the resistor R4 and the pin 2 of the chip U1, the cathode of the diode D4 is respectively connected to one end of the resistor R3 and the pin 3 of the chip U1, and the other ends of the resistors R3, R4, and R5 are connected to a common ground; the pin 4 of the chip U1 is connected to the output end of the reset unit, the pins 5 and 8 of the chip U1 are grounded, and the pins 11, 10, 9, and 7 of the chip U1 are connected to the signal input end of the LED indication unit.

[0025] like Figure 3As shown, the LED indication unit includes an indication signal judgment circuit 42 and an indication circuit 41, wherein the indication signal judgment circuit 42 is composed of diodes D5, D6, D7, and D8, and the indication circuit 41 is composed of diodes D9, D10, D11, D12, D13, D14, D15, and D16, resistors R6, R7, R8, and R9, and light-emitting diodes LED1, LED2, LED3, and LED4. The anode of the diode D5 is respectively connected to the signal output end of the decoding unit and the anode of the diode D9, the anode of the diode D6 is respectively connected to the signal output end of the decoding unit and the anode of the diode D11, the anode of the diode D7 is respectively connected to the signal output end of the decoding unit and the anode of the diode D13, the anode of the diode D8 is respectively connected to the signal output end of the decoding unit and the anode of the diode D15, and the diodes D5 and D 6. The cathodes of D7 and D8 are connected in parallel and then connected to the signal input end of the power supply unit. The cathode of the diode D9 is respectively connected to one end of the resistor R6 and the cathode of the diode D10. The cathode of the diode D11 is respectively connected to one end of the resistor R7 and the cathode of the diode D12. The cathode of the diode D13 is respectively connected to one end of the resistor R8 and the cathode of the diode D14. The cathode of the diode D15 is respectively connected to one end of the resistor R9 and the cathode of the diode D16. The anodes of the diodes D10, D12, D14, and D16 are connected in parallel and then connected to one end of the reset button K1. The other end of the reset button K1 is connected to the power supply VBAT1. The other ends of the resistors R6, R7, R8, and R9 are respectively connected to the anodes of the light-emitting diodes LED1, LED2, LED3, and LED4 in a one-to-one correspondence. The cathodes of the light-emitting diodes LED1, LED2, LED3, and LED4 are grounded in common.

[0026] like Figure 4 As shown, the reset unit is composed of a reset button K1, a resistor R12, a voltage zener diode Z1, a resistor R10, a resistor R11 and a comparator U2. One end of the reset button K1 is connected to the power supply VBAT1, and the other end is respectively connected to one end of the resistor R12 and one end of the resistor R11. The other end of the resistor R12 is grounded. The other end of the resistor R11 is connected to the positive input end of the comparator U2. The negative input end of the comparator U2 is respectively connected to one end of the resistor R10 and the cathode of the voltage zener diode Z1. The anode of the voltage zener diode Z1 is grounded. The other end of the resistor R10 and the 4 pins of the comparator U2 are all connected to the power supply V1. When the reset button K1 is pressed, all LED lights are lit to confirm whether there is a problem with the light-emitting diode LED.

[0027] like Figure 5As shown, the power supply unit includes resistors R13, R14, R15, diodes D17, D18, and transistors Q2 and Q3. One end of the resistor R13 is connected to the output end of the LED indicating unit as the signal input end of the power supply unit, the other end of the resistor R13 is connected to the base of the transistor Q2, the collector of the transistor Q2 is connected to one end of the resistors R14 and R15 respectively, the emitter of the transistor Q2 is grounded, the other end of the resistor R14 is connected to the emitter of the transistor Q3 and the cathode of the diode D18 respectively, the other end of the resistor R15 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to the cathode of the diode D17, the anode of the diode D17 is connected to the system power supply VCC, and the anode of the diode D18 is connected to the battery VBAT. The power supply V1 is obtained from the system power supply VCC through the diode D17, and the power supply VBAT1 is obtained from the battery VBAT through the diode D18.

[0028] The following combination Figures 1 to 5 The present invention is further described.

[0029] The power supply unit is normally powered by the system power supply VCC. When the system power supply VCC is powered off and the LED indicator unit has an indication signal, the power supply unit automatically connects the battery VBAT to continue to power the LED indicator unit. When the system power supply VCC is present, the system power supply VCC reaches the power supply V1 through the diode D17; when the system power supply VCC is powered off, there are two situations: the first is that the LED is lit, at this time the battery VBAT reaches the power supply V1 through the diode D18 and the transistor Q3; the second is that the LED is not lit, the transistor Q3 is not conducting, the power supply V1 has no power, and the system does not consume power.

[0030] The control signal is sent to the decoding unit, the decoding unit decodes and latches the control signal and sends the decoded indication information to the LED indication unit. The LED indication unit includes at least one LED lamp. The LED indication unit lights up the corresponding LED lamp according to the indication information sent by the decoding unit. When the system power supply VCC is powered off, if one or more LED elements in the LED indication unit are in a lit state, the LED indication unit sends a high-level signal to the power supply unit, and the circuit of the power supply unit connected to the battery VBAT is turned on. The battery VBAT supplies power to the LED indication unit to keep the LED elements that are lit when the system is powered off. This overcomes the influence of the power off of the system power supply VCC on the signal indication of the low-voltage electrical appliance or controller, so that when the system power supply VCC is powered off, the operator can still obtain the status information of the low-voltage electrical appliance or controller.

[0031] When the operator obtains the indication status information of the low-voltage electrical appliance or controller when the system loses power, the indication information on the LED indication unit is cleared by pressing the reset button K1. When the reset button K1 is pressed to trigger the reset unit, the reset unit generates a reset level signal and sends it to the decoding unit. The decoding unit clears the currently latched data and sends an LED cutoff signal to the LED indication unit, turning off the LED indication function, thereby clearing the indication information.

[0032] While the reset unit clears the indication information of the LED indication unit, it sends a low-level signal to the power supply unit, disconnects the circuit between the battery VBAT and the LED indication unit, and the battery VBAT stops supplying power to the LED indication unit. This operation can save the power consumption of the battery VBAT and improve the service life of the battery VBAT to a certain extent.

[0033] refer to Figure 2 The reset unit and the latch control signal input circuit 22 are both connected to the pin LE of the decoding chip 21. When the system power supply VCC is normally supplied, the latch control signal input circuit 22 sends the latch signal to the decoding unit, and the indication signal input circuit 23 is connected to the decoding chip 21, and the indication signal input circuit 23 sends the indication signal to the decoding unit.

[0034] Specifically, when the system power supply VCC is operating normally, the decoding chip 21 receives the indication signal sent by the indication signal input circuit 23. The indication signal input circuit 23 includes three groups of indication signal inputs MCU / A0, MCU / A1, and MCU / A2. The decoding chip 21 decodes the indication signal and converts it into LED drive signals L1, L2, L3, and L4 and sends them to the LED indication unit. The converted LED drive signals are not limited to the above-mentioned L1, L2, L3, and L4, and can be expanded to eight or more output signals as needed.

[0035] The MCU / LE latch signal reaches the latch signal receiving pin LE of the decoding chip 21. When the system power supply VCC is powered, the latch signal comes from the control terminal MCU / LE, and the decoding chip 21 decodes and latches the signals at the MCU / A0, MCU / A1, and MCU / A2 terminals.

[0036] The reset unit is also connected to the pin LE of the decoding chip 21. When the system power supply VCC is powered off, the input control signals MCU / A0, MCU / A1, and MCU / A2 are in a high-impedance state. The inputs of the decoding circuits A0, A1, and A2 are pulled to a low level by resistors R5, R4, and R3 respectively. The control terminal MCU / LE is also in a high-impedance state. At this time, the MOS tube Q1 of the latch control signal input circuit 22 is not turned on, and the pin LE on the decoding chip 21 is determined by the KEYLE2 output by the reset unit.

[0037] refer to Figure 3 The indication signal judgment circuit 42 performs a logic "OR" operation on the control signal sent by the decoding unit through a double diode. The indication circuit 41 includes 4 LED components and 4 current-limiting resistors. The current-limiting resistors are used to protect the LED components. The 4 LED components are LED1, LED2, LED3, and LED4, which are used for signal indication. The 4 current-limiting resistors are R6, R7, R8, and R9, which are used to protect the LED components. The LED components indicate according to the LED driving signals L1, L2, L3, and L4 sent by the decoding unit.

[0038] The indication signal judgment circuit 42 performs a logic "OR" operation on the LED driving signals L1, L2, L3, and L4 issued by the decoding unit. When there is a high-level signal in L1, L2, L3, and L4, the DOLED signal is high, and the DOLED signal is output to the power supply unit to control the conduction of the battery circuit to ensure that the battery VBAT can be used to supply power to the indication circuit after the system power supply VCC is powered off, and maintain the normal indication of the LED after power off; when the reset button K1 is pressed, the signal KEYLE is high, and at this time, the light-emitting diodes LED1, LED2, LED3, and LED4 can also be driven to conduct and emit light through the diodes D10, D12, D14, and D16.

[0039] refer to Figure 4 The power supply VBAT1 comes from the battery VBAT. When the reset button K1 is pressed, the comparator pin 2 inputs the battery voltage, which is higher than the comparator pin 1 by the voltage regulation value of the voltage regulator diode 2Z4. The comparator compares the power supply V1 and the power supply VBAT1. When the battery voltage is higher than the regulated voltage, the comparator outputs a low-level signal to notify the latch circuit to clear the decoding unit output LED drive signals L1, L2, L3, and L4 to 0, and the output indication LED is reset. At the same time, the DOLED end output is 0, cutting off the backup battery output. The entire backup LED indication circuit does not work, achieving the reset purpose.

[0040] refer to Figure 5 , under normal circumstances, it is powered by the system power supply VCC; when the system power supply VCC loses power, if the LED driving signal sent by the decoding unit has a signal indicating that the LED element is turned on and emits light, the DOLED signal becomes a high level and triggers Q2 and Q3 to turn on, so that the battery circuit is turned on, and the battery VBAT output is collected at the power supply V1 as a backup power supply for the system power supply VCC.

[0041] The working principle of the present invention is as follows: a control signal is sent to a decoding unit through a control signal port, and after being latched by the decoding unit, it is sent to an LED indicating unit and drives the corresponding LED element to conduct and emit light; a power supply unit supplies power to each unit of the system, and adopts two power supplies, one of which is a system power supply VCC provided by a system where an LED control circuit in a DC circuit breaker controller is located, and the other is a battery VBAT, the system power supply VCC is a main power supply, the battery VBAT is a backup power supply, and the power switching is completed by the power supply unit; when the system power supply VCC is powered off and an LED element is turned on, the LED indicating unit notifies the power supply unit to turn on the battery VBAT by sending a signal to keep the entire LED indicating unit working and maintain the LED indication at the power-off moment, until the user observes and collects the information of the LED indication on site, the battery VBAT can be cut off through a reset button K1 and a reset circuit, and the LED is turned off at the same time; when the system power supply VCC is powered off and the LEDs are all turned off and disconnected, the battery VBAT will not output, the entire LED indicating unit backed up by the battery VBAT will not work and consume the battery VBAT energy, and the purpose of energy saving can be achieved.

[0042] In summary, the present invention uses the battery VBAT as a backup power supply, and performs power saving operation by judging the conduction status of the LED to back up the battery power supply. The user can also use the reset button K1 to eliminate the battery cut-off and LED indication, so that the low-voltage electrical appliance and / or controller integrating the LED control circuit for the DC circuit breaker controller of the present invention has a stable and reliable signal indication function.

Claims

1. An LED control circuit for a DC circuit breaker controller, characterized in that: include: A reset unit, used for resetting the state of the LED light that is kept on; A decoding unit, used to control the corresponding LED lamp in the LED indication unit to light up; LED indication unit, used for indicating the lighting of LED lamp; A power supply unit, used to supply power to the decoding unit, the reset unit, and the LED indication unit respectively; The output end of the reset unit is connected to the reset end of the decoding unit, the signal input end of the decoding unit receives the latch signal and the indication signal output by the DC circuit breaker controller, the signal output end of the decoding unit is connected to the signal input end of the LED indication unit, the output end of the LED indication unit is divided into two paths, one is connected to the signal input end of the power supply unit, and the other is connected to the reset button K1 in the reset unit; the power supply unit includes a system power supply VCC and a battery VBAT; The power supply unit includes resistors R13, R14, and R15, diodes D17 and D18, and transistors Q2 and Q3. One end of the resistor R13 is connected to the output end of the LED indication unit as the signal input end of the power supply unit, the other end of the resistor R13 is connected to the base of the transistor Q2, the collector of the transistor Q2 is respectively connected to one end of the resistors R14 and R15, the emitter of the transistor Q2 is grounded, the other end of the resistor R14 is respectively connected to the emitter of the transistor Q3 and the cathode of the diode D18, the other end of the resistor R15 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to the cathode of the diode D17, the anode of the diode D17 is connected to the system power supply VCC, and the anode of the diode D18 is connected to the battery VBAT.

2. The LED control circuit for a DC circuit breaker controller according to claim 1, characterized in that: The decoding unit comprises a decoding chip (21), a latch control signal input circuit (22) and an indication signal input circuit (23). The decoding chip (21) comprises a chip U1. The chip U1 adopts a 3-8 decoder. The latch control signal input circuit (22) comprises a diode D1, whose anode receives the latch signal output by the DC circuit breaker controller, and whose cathode is respectively connected to one end of the resistor R1 and the gate of the MOS tube Q1. The source of the MOS tube Q1 is connected to the other end of the resistor R1 and then to the ground. The drain of the MOS tube Q1 is connected to the 4th pin of the chip U1. The indication signal input circuit (23) comprises diodes D2, D3, D4 and The chip U1 is composed of resistors R3, R4, and R5, the anodes of the diodes D2, D3, and D4 are all connected to the indication signal output by the DC circuit breaker controller, the cathode of the diode D2 is respectively connected to one end of the resistor R5 and pin 1 of the chip U1, the cathode of the diode D3 is respectively connected to one end of the resistor R4 and pin 2 of the chip U1, the cathode of the diode D4 is respectively connected to one end of the resistor R3 and pin 3 of the chip U1, and the other ends of the resistors R3, R4, and R5 are commonly grounded; pin 4 of the chip U1 is connected to the output end of the reset unit, pins 5 and 8 of the chip U1 are grounded, and pins 11, 10, 9, and 7 of the chip U1 are connected to the signal input end of the LED indication unit.

3. The LED control circuit for a DC circuit breaker controller according to claim 1, characterized in that: The LED indication unit comprises an indication signal judgment circuit (42) and an indication circuit (41), wherein the indication signal judgment circuit (42) is composed of diodes D5, D6, D7, and D8, and the indication circuit (41) is composed of diodes D9, D10, D11, D12, D13, D14, D15, and D16, resistors R6, R7, R8, and R9, and light-emitting diodes LED1, LED2, LED3, and LED4, wherein the anode of the diode D5 is respectively connected to the signal output end of the decoding unit and the anode of the diode D9, the anode of the diode D6 is respectively connected to the signal output end of the decoding unit and the anode of the diode D11, the anode of the diode D7 is respectively connected to the signal output end of the decoding unit and the anode of the diode D13, the anode of the diode D8 is respectively connected to the signal output end of the decoding unit and the anode of the diode D15, and the anode of the diode D 5. The cathodes of D6, D7, and D8 are connected in parallel and then connected to the signal input end of the power supply unit. The cathode of the diode D9 is respectively connected to one end of the resistor R6 and the cathode of the diode D10. The cathode of the diode D11 is respectively connected to one end of the resistor R7 and the cathode of the diode D12. The cathode of the diode D13 is respectively connected to one end of the resistor R8 and the cathode of the diode D14. The cathode of the diode D15 is respectively connected to one end of the resistor R9 and the cathode of the diode D16. The anodes of the diodes D10, D12, D14, and D16 are connected in parallel and then connected to one end of the reset button K1. The other end of the reset button K1 is connected to the power supply VBAT1. The other ends of the resistors R6, R7, R8, and R9 are respectively connected to the anodes of the light-emitting diodes LED1, LED2, LED3, and LED4 in a one-to-one correspondence. The cathodes of the light-emitting diodes LED1, LED2, LED3, and LED4 are grounded in common.

4. The LED control circuit for a DC circuit breaker controller according to claim 1, characterized in that: The reset unit is composed of a reset button K1, a resistor R12, a voltage-stabilizing diode Z1, a resistor R10, a resistor R11 and a comparator U2. One end of the reset button K1 is connected to a power supply VBAT1, and the other end is respectively connected to one end of the resistor R12 and one end of the resistor R11. The other end of the resistor R12 is grounded. The other end of the resistor R11 is connected to a positive input end of the comparator U2. The inverting input end of the comparator U2 is respectively connected to one end of the resistor R10 and a cathode of the voltage-stabilizing diode Z1. The anode of the voltage-stabilizing diode Z1 is grounded. The other end of the resistor R10 and the four pins of the comparator U2 are all connected to a power supply V1.

Images