CN215897703U - Enabling signal output circuit capable of setting action voltage - Google Patents
Enabling signal output circuit capable of setting action voltage Download PDFInfo
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- CN215897703U CN215897703U CN202121994232.5U CN202121994232U CN215897703U CN 215897703 U CN215897703 U CN 215897703U CN 202121994232 U CN202121994232 U CN 202121994232U CN 215897703 U CN215897703 U CN 215897703U
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Abstract
The utility model discloses an enable signal output circuit capable of setting an action voltage.A direct-current power supply voltage VCC is connected with a pin 5 of U1B through a voltage division end after being connected in series with R1 and R2; VCC is connected with one end of R3, the other end of R3 is connected with pin 1 and pin 8 of U2, and the reference voltage end of U2 output is connected with pin 6 of U1B; the 7-pin of U1B is connected with one end of R4, and the other end of R4 is connected with the 5 th pin of U1B; the 7 th leg of U1B is connected with the 3 rd leg of U1A through R5, the 2, 3 and 1 st legs of U1A, and R7, R8, R9 and C4; the common ends of R12 and R13 are connected to the 3 rd pin of a trigger U3; the direct-current power supply voltage VCC is subjected to voltage reduction through D2, R6 and D3 and then is connected with a pin 14 and a pin 5 of U3 to supply power to U3 and serve as data input, meanwhile VDD of U3 also supplies power to R12 and R13, a pin 1 of U3 is connected with R15 and R16, the other end of R15 is grounded, and the other end of R16 serves as circuit output. The utility model has the advantages of high response speed, high sensitivity, good stability and the like.
Description
Technical Field
The utility model belongs to the technical field of electronic circuits, belongs to a control circuit of electronic equipment for a coal mine, and particularly relates to an enable signal output circuit capable of setting an action voltage.
Background
The electronic equipment is started up only after the input voltage is higher than a certain value, so as to prevent the voltage of an input circuit from being smaller than the voltage value required by output, for example, a lithium battery pack charging circuit, 6 lithium battery packs connected in series require that the input charging voltage is larger than 18V, otherwise, the charging circuit cannot work normally, the equipment can be started up only when the power supply voltage of the equipment is required to be larger than 18V, and the working stability, reliability and safety of the coal mine electronic equipment can be effectively ensured. The existing control circuit does not adopt a hardware circuit to control the starting of the electronic equipment, and has poor stability and reliability.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an enabling signal output circuit which adopts a hardware circuit to set a starting voltage point and controls an enabling signal of an output starting voltage so as to ensure that electronic equipment can be stably and effectively started to work and can set an action voltage.
The technical scheme adopted by the utility model is as follows: the output circuit comprises U1A, U1B, U2 and U3, and is characterized in that: the direct-current power supply voltage VCC is connected with the 5 pin of U1B through the voltage dividing end after the R1 and the R2 are connected in series; VCC is connected with one end of R3, the other end of R3 is connected with pin 1 and pin 8 of U2, and the reference voltage end of U2 output is connected with pin 6 of U1B; the 7-pin of U1B is connected with one end of R4, the other end of R4 is connected with the 5 th pin of U1B, and the partial circuit forms a hysteresis comparator; the 7 th pin of U1B is connected with the 3 pins of U1A through R5, and the 2, 3 and 1 pins of U1A, R7, R8, R9 and C4 form an oscillating circuit; the oscillation signal is limited by D1, R10 and R11, the voltage change of a common terminal is controlled by Q1 after R12 and R13 are connected in series, and the common terminal of R12 and R13 is connected to a 3 rd pin of a trigger U3 and is used as the frequency signal input of the trigger; the DC power supply voltage VCC is reduced by D2, R6 and D3 and then is connected with the 14 pin and the 5 pin of U3 to supply power to U3 and be used as data input, meanwhile, VDD of U3 also supplies power to R12 and R13, pin 1 of U3 is connected with R15 and R16, the other end of R15 is grounded, the other end of R16 is used as circuit output, and the circuit forms a trigger output circuit.
In the power-on process, when the power supply voltage is divided by R1 and R2 and then is smaller than a reference voltage value, the output of a pin 7 of U1B is close to a voltage value of GND, the input of an oscillator formed by devices such as U1A is pulled low, oscillation cannot be started, no oscillation signal is output from pin 1 of U1A, voltage drop at two ends of R13 is controlled to be unchanged by Q1, no frequency signal is input from pin 3 of the trigger U3, and pin 1 of U3 maintains 0V voltage in a starting state; in addition, in the process of electrifying the direct-current power supply, the divided voltage values of R1 and R2 are larger than the reference voltage value, the output of the 7 pin of U1B is close to the VCC voltage value, an oscillating circuit formed by the following U1A starts oscillating under the action of initial voltage, an oscillating signal controls the voltage change of the two ends of R13 through Q1, the 3 rd pin of a trigger U3 has frequency signal input, the 1 pin of U3 outputs the voltage which is the same as the 14 pin VDD of U3, the output signal can be used for controlling the enabling end of a power chip in electronic equipment, and the equipment is electrified and started up after the input voltage of the equipment reaches a set value.
According to the utility model, through the hardware circuit, the safety equipment can stably output the enabling signal of the action voltage after the input of the direct current voltage reaches the reliable working state, so that the electronic equipment can stably and effectively start up to work. The utility model has the advantages of high response speed, high sensitivity, good stability and the like, fills the blank of the circuit and is worthy of wide popularization and application.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
As shown in fig. 1, the present invention includes U1A, U1B, U2 and U3, wherein the dc power voltage VCC is connected to pin 5 of U1B through the voltage dividing end of the serial connection of R1 and R2; VCC is connected with one end of R3, the other end of R3 is connected with pin 1 and pin 8 of U2, and the reference voltage end of U2 output is connected with pin 6 of U1B; the 7-pin of U1B is connected with one end of R4, the other end of R4 is connected with the 5 th pin of U1B, and the partial circuit forms a hysteresis comparator; the 7 th pin of U1B is connected with the 3 pins of U1A through R5, and the 2, 3 and 1 pins of U1A, R7, R8, R9 and C4 form an oscillating circuit; the oscillation signal is limited by D1, R10 and R11, the voltage change of a common terminal is controlled by Q1 after R12 and R13 are connected in series, and the common terminal of R12 and R13 is connected to a 3 rd pin of a trigger U3 and is used as the frequency signal input of the trigger; the DC power supply voltage VCC is reduced by D2, R6 and D3 and then is connected with the 14 pin and the 5 pin of U3 to supply power to U3 and be used as data input, meanwhile, VDD of U3 also supplies power to R12 and R13, pin 1 of U3 is connected with R15 and R16, the other end of R15 is grounded, the other end of R16 is used as circuit output, and the circuit forms a trigger output circuit. The U1A and U1B are LM358D dual operational amplifiers; u2 is TL431 triode; u3 is MC14013BD chip.
Claims (1)
1. An enable signal output circuit capable of setting an operating voltage, the circuit comprising U1A, U1B, U2 and U3, characterized in that: the direct-current power supply voltage VCC is connected with the 5 pin of U1B through the voltage dividing end after the R1 and the R2 are connected in series; VCC is connected with one end of R3, the other end of R3 is connected with pin 1 and pin 8 of U2, and the reference voltage end of U2 output is connected with pin 6 of U1B; the 7-pin of U1B is connected with one end of R4, the other end of R4 is connected with the 5 th pin of U1B, and the partial circuit forms a hysteresis comparator; the 7 th pin of U1B is connected with the 3 pins of U1A through R5, and the 2, 3 and 1 pins of U1A, R7, R8, R9 and C4 form an oscillating circuit; the oscillation signal is limited by D1, R10 and R11, the voltage change of a common terminal is controlled by Q1 after R12 and R13 are connected in series, and the common terminal of R12 and R13 is connected to a 3 rd pin of a trigger U3 and is used as the frequency signal input of the trigger; the DC power supply voltage VCC is reduced by D2, R6 and D3 and then is connected with 14 pin and 5 pin of U3 to supply power to U3 and be used as data input, meanwhile VDD of U3 also supplies power to R12 and R13, pin 1 of U3 is connected with R15 and R16, the other end of R15 is grounded, the other end of R16 is used as circuit output, and the partial circuit forms a trigger output circuit; the U1A and U1B are LM358D dual operational amplifiers; u2 is TL431 triode; u3 is MC14013BD chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121994232.5U CN215897703U (en) | 2021-08-24 | 2021-08-24 | Enabling signal output circuit capable of setting action voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121994232.5U CN215897703U (en) | 2021-08-24 | 2021-08-24 | Enabling signal output circuit capable of setting action voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215897703U true CN215897703U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121994232.5U Active CN215897703U (en) | 2021-08-24 | 2021-08-24 | Enabling signal output circuit capable of setting action voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215897703U (en) |
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2021
- 2021-08-24 CN CN202121994232.5U patent/CN215897703U/en active Active
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