CN218298799U - Single-chip microcomputer power supply control circuit with zero standby power consumption - Google Patents
Single-chip microcomputer power supply control circuit with zero standby power consumption Download PDFInfo
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- CN218298799U CN218298799U CN202123341910.0U CN202123341910U CN218298799U CN 218298799 U CN218298799 U CN 218298799U CN 202123341910 U CN202123341910 U CN 202123341910U CN 218298799 U CN218298799 U CN 218298799U
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Abstract
The utility model relates to a standby zero-power consumption's single chip microcomputer power control circuit belongs to electron technical field. The power supply comprises triodes Q1-Q4, resistors R1-R4, capacitors C1 and C2, a key K1, a power supply off control end Voff and a power supply output end Vout. And when the key K1 is pressed once, the power supply control circuit is triggered to enter a working state, and power is supplied to the single chip microcomputer system. After the single chip microcomputer system finishes working, a shutdown signal of a few milliseconds is provided for the power supply control circuit, the power supply control circuit cuts off power supply of the single chip microcomputer system, and the power supply control circuit and the single chip microcomputer system enter a standby state at the same time. In a standby state, the power supply control circuit and the single chip microcomputer system have zero power consumption, and the aim of better energy saving is fulfilled.
Description
Technical Field
The utility model relates to a standby zero-power consumption's single chip microcomputer power control circuit belongs to electron technical field.
Background
In the single chip system powered by dry battery, after the single chip finishes the work task, the single chip enters the sleep mode by using a program method, so as to achieve the purposes of saving energy and prolonging the service life of the battery. However, this method may not be effective in saving energy because the power supply is not turned off and other circuits of the system are still operating.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a standby zero-power consumption's single chip microcomputer power control circuit for the single chip microcomputer system of dry battery power supply. The power supply control circuit is provided with a power supply starting button, the power supply starting button is pressed, the power supply control circuit is connected with the power supply of the single chip microcomputer system, and the single chip microcomputer system starts to work. When the single chip microcomputer system finishes the work task, the single chip microcomputer sends a shutdown control signal to the power supply control circuit, the power supply control circuit shuts off the power supply of the single chip microcomputer system, and the power supply control circuit and the single chip microcomputer system enter a standby state. In a standby state, the singlechip system and the power supply control circuit do not work and have zero power consumption, so that the aims of saving energy and prolonging the service life of a battery are fulfilled. The adopted specific technical scheme is as follows:
a standby zero-power-consumption singlechip power supply control circuit comprises triodes Q1-Q4, resistors R1-R4, capacitors C1 and C2, a key K1, a power-off control end Voff and a power output end Vout, wherein an emitting electrode of the triode Q1 is connected with +5V and one end of the resistor R1, a base electrode is connected with one end of a resistor R3, a collector electrode is connected with the anode of the capacitor C2 and the power output end Vout, and the cathode of the capacitor C2 is grounded; the emitting electrode of the triode Q2 is connected with the other end of the resistor R3 and the collecting electrode of the triode Q4, the base electrode is connected with the collecting electrode of the triode Q3, the collecting electrode is connected with one end of the key K1, one end of the capacitor C1, one end of the resistor R2 and the base electrode of the triode Q3, the other end of the key K1 is connected with the other end of the resistor R1, and the other end of the capacitor C1, the other end of the resistor R1 and the emitting electrode of the triode Q3 are grounded; the emitter of the triode Q4 is grounded, the base is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with a power switch control end Voff; the triodes Q1 and Q2 are low-power PNP tubes, and the triodes Q3 and Q4 are low-power NPN tubes.
The utility model has the advantages that: the utility model provides a stand-by zero power consumption's singlechip power control circuit for the singlechip system of dry battery power supply. In a standby state, the single chip microcomputer system and the power supply control circuit do not work and have zero power consumption, so that the aims of saving energy and prolonging the service life of a battery are fulfilled.
Drawings
Fig. 1 shows a specific circuit of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The specific circuit is as shown in fig. 1, the standby zero-power-consumption singlechip power supply control circuit comprises triodes Q1-Q4, resistors R1-R4, capacitors C1 and C2, a key K1, a power-off control end Voff and a power output end Vout, wherein an emitter of the triode Q1 is connected with +5V and one end of the resistor R1, a base is connected with one end of the resistor R3, a collector is connected with the anode of the capacitor C2 and the power output end Vout, and the cathode of the capacitor C2 is grounded; the emitting electrode of the triode Q2 is connected with the other end of the resistor R3 and the collecting electrode of the triode Q4, the base electrode is connected with the collecting electrode of the triode Q3, the collecting electrode is connected with one end of the key K1, one end of the capacitor C1, one end of the resistor R2 and the base electrode of the triode Q3, the other end of the key K1 is connected with the other end of the resistor R1, and the other end of the capacitor C1, the other end of the resistor R1 and the emitting electrode of the triode Q3 are grounded; the emitter of the triode Q4 is grounded, the base of the triode Q4 is connected with one end of the resistor R4, and the other end of the resistor R4 is connected with the power switch control end Voff; the triodes Q1 and Q2 are low-power PNP tubes, and the triodes Q3 and Q4 are low-power NPN tubes.
In implementation, the power output terminal Vout is connected with the anode of the power supply of the single chip microcomputer system. The power-off control end Voff is connected with an output port of the singlechip, and the output port sends out low level at ordinary times and sends out high level for a few milliseconds when the singlechip needs to be shut down.
The key K1 is a power supply starting key, and the triodes Q2 and Q3 are used for simulating one-way controllable silicon so as to achieve the purpose of maintaining conduction once triggered.
When the power supply is just connected, because the key K1 is opened, the base electrode of the triode Q3 has no driving current, the triode Q3 is not conducted, the triode Q2 is also not conducted, the triode Q1 is finally not conducted, the voltage output end Vout has no voltage output, the power supply control circuit and the single chip microcomputer system are both in a standby state, and no element consumes the current of the +5V power supply.
When the singlechip system is required to work, the key K1 is pressed once. When the key K1 is switched on, the base electrode of the triode Q3 obtains driving current, the current provided by the +5V power supply flows into the collector electrode of the triode Q3 through the emitter electrode of the triode Q1, the resistor R3 and the emitter electrode of the triode Q2, and the triode Q3 enters a conducting state. When the transistor Q3 is turned on, the collector current becomes the base current of the transistor Q2, so that the transistor Q2 also enters a conducting state. After the triode Q2 is conducted, the collector current of the triode Q2 becomes the driving current of the base of the triode Q3, so that the triode Q3 and the triode Q2 are mutually promoted to be conducted and enter a positive feedback state, the conducting current of the two tubes is rapidly increased, and the two tubes enter a saturated conducting state. After the key K1 is bounced, the Q3 and the Q2 continuously maintain a saturated conduction state, the triode Q2 drives the triode Q1 to be conducted, the voltage is sent out from the power output end Vout, and the single chip microcomputer system obtains power supply to work. When the single chip microcomputer system works, the single chip microcomputer is connected with an output port of the power-off control end Voff, low-level output is maintained, and the triode Q4 is maintained in a cut-off state.
After the single chip system finishes the set task, the single chip is connected with the output port of the power-off control end Voff and sends a high-level control signal for several milliseconds. This high level, which is several milliseconds, drives transistor Q4 into saturation conduction, with the collector voltage dropping to about 0V, causing transistors Q2 and Q3 to flip from saturation conduction to cutoff. When the output port of the singlechip connected with the power-off control end Voff is restored to a low level, the triodes Q2, Q3 and Q4 are all in a cut-off state, so that the triode Q1 is turned over to the cut-off state, and the power control circuit and the singlechip system are in a standby state.
Claims (1)
1. A standby zero-power-consumption single-chip microcomputer power supply control circuit is characterized in that: the circuit comprises triodes Q1-Q4, resistors R1-R4, capacitors C1 and C2, a key K1, a power switch control end Voff and a power output end Vout, wherein an emitting electrode of the triode Q1 is connected with +5V and one end of the resistor R1, a base electrode is connected with one end of the resistor R3, a collector electrode is connected with the anode of the capacitor C2 and the power output end Vout, and the cathode of the capacitor C2 is grounded; the emitter of the triode Q2 is connected with the other end of the resistor R3 and the collector of the triode Q4, the base is connected with the collector of the triode Q3, the collector is connected with one end of the key K1, one end of the capacitor C1, one end of the resistor R2 and the base of the triode Q3, the other end of the key K1 is connected with the other end of the resistor R1, and the other end of the capacitor C1, the other end of the resistor R1 and the emitter of the triode Q3 are grounded; the emitter of the triode Q4 is grounded, the base is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with a power switch control end Voff; the triodes Q1 and Q2 are low-power PNP tubes, and the triodes Q3 and Q4 are low-power NPN tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123341910.0U CN218298799U (en) | 2021-12-28 | 2021-12-28 | Single-chip microcomputer power supply control circuit with zero standby power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123341910.0U CN218298799U (en) | 2021-12-28 | 2021-12-28 | Single-chip microcomputer power supply control circuit with zero standby power consumption |
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| Publication Number | Publication Date |
|---|---|
| CN218298799U true CN218298799U (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123341910.0U Active CN218298799U (en) | 2021-12-28 | 2021-12-28 | Single-chip microcomputer power supply control circuit with zero standby power consumption |
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| CN (1) | CN218298799U (en) |
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2021
- 2021-12-28 CN CN202123341910.0U patent/CN218298799U/en active Active
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