CN201237718Y - Power supply control circuit of single-chip - Google Patents
Power supply control circuit of single-chip Download PDFInfo
- Publication number
- CN201237718Y CN201237718Y CNU2008200950822U CN200820095082U CN201237718Y CN 201237718 Y CN201237718 Y CN 201237718Y CN U2008200950822 U CNU2008200950822 U CN U2008200950822U CN 200820095082 U CN200820095082 U CN 200820095082U CN 201237718 Y CN201237718 Y CN 201237718Y
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- controller
- power supply
- triode
- input end
- voltage stabilizing
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Abstract
The utility model discloses a single chip power control circuit, which comprises a power supply, a single chip, a voltage stabilizing IC used for providing stable voltage for the single chip and an operating switch with the two ends respectively connected with the power supply and the voltage stabilizing IC. The utility model is characterized by also comprising a controller; one end of the operating switch is connected with the power supply, and the other end is connected with the input end of the controller and the input end of the single chip; the input end of the controller is also connected with the output end of the single chip; and the output end of the controller is connected with the input end of the voltage stabilizing IC. The controller is a triode controller and comprises a first triode and a second triode. In the technical proposal, the voltage stabilizing IC is communicated with the power supply or controlled by the controller; the controller simultaneously receives the control signals of the operating switch and the single chip. When the operating switch is disconnected, the single chip can still control the controller, so as to control the connection and disconnection between the voltage stabilizing IC and the power supply. The utility model is applicable to the circuit in which the single chip can still operate for a period of time after the operating switch is pressed down for shutdown.
Description
Technical field
The utility model relates to a kind of microcontroller power supply control circuit.
Background technology
Power circuit commonly used adopts the Push And Release of the direct control circuit of operating switch SW1 as shown in Figure 1.The two ends of operating switch SW1 connect power supply and voltage stabilizing IC1 respectively, after operating switch SW1 closure, and power on circuitry, voltage stabilizing IC1 produces a stable voltage VCC, and VCC gives single-chip microcomputer IC2 power supply.After the single-chip microcomputer IC2 energising, circuit begins operate as normal.After operating switch SW1 disconnects, the entire circuit outage, then single-chip microcomputer IC2 quits work, and entire circuit quits work.The shortcoming of sort circuit is: in some application scenario, if by needing circuit to continue delay working shutdown again after a period of time behind the closing key, this circuit can only strengthen the capacity of capacitor C 1 and capacitor C 2 and realize, but delay time can not be accomplished accurate control, and the time lengthening that because strengthening the capacity of capacitor C 1, capacitor C 2 single-chip microcomputer IC2 is powered on to enter operate as normal.Also there is another possibility in this circuit, because operating switch SW1 cuts off power supply immediately when closing, if there is multiple power supplies in the system, electric situation complexity, the capacity that strengthens capacitor C 1, capacitor C 2 sometimes can not reach the purpose that prolongs System production time.
Summary of the invention
The technical problems to be solved in the utility model overcomes above defective exactly, proposes a kind of microcontroller power supply control circuit, and after operating switch was closed, power supply still was subjected to the control of single-chip microcomputer, improves the working time of single-chip microcomputer and the controllability of duty.
Technical matters of the present utility model is solved by the following technical programs.
The operating switch that this microcontroller power supply control circuit, the voltage stabilizing IC, two ends that comprise power supply, single-chip microcomputer, provides burning voltage for single-chip microcomputer are connected with voltage stabilizing IC with power supply respectively.
The characteristics of this microcontroller power supply control circuit are, also comprise controller, one end of described operating switch is connected with power supply, the other end is connected with the input end of controller, the input end of single-chip microcomputer, the input end of described controller also is connected with the output terminal of single-chip microcomputer, and the output terminal of described controller is connected with the input end of voltage stabilizing IC.
Described controller is a transistor controller, comprise first triode and second triode, the input end of described second triode is connected with an end of operating switch by resistance, the input end of described second triode also is connected with the output terminal of single-chip microcomputer by diode, resistance, and the output terminal of described second triode is connected with the input end of first triode; The output terminal of described first triode is connected with the input end of voltage stabilizing IC.
One end of described operating switch is connected with the input end of single-chip microcomputer by parallel resistor, diode.
The utility model is compared with the prior art the beneficial effect that has: the power connection of voltage stabilizing IC or by being controlled by controller, and controller is accepted the control signal of operating switch and single-chip microcomputer simultaneously, after operating switch disconnects, single-chip microcomputer still can be controlled controller, thus the connection of control voltage stabilizing IC and power supply or by.Single-chip microcomputer still will keep for example needing to preserve significant data after the shutdown in the circuit of a period of time work after being applicable to shutdown push switch, application that then could shutdown system.
Description of drawings
Fig. 1 is the circuit diagram of existing power control circuit;
Fig. 2 is the circuit block diagram of embodiment;
Fig. 3 is the circuit diagram of embodiment.
Embodiment
A kind of microcontroller power supply control circuit as shown in Figure 2 comprises power supply 100, operating switch SW1, voltage stabilizing IC1, single-chip microcomputer IC2, controller 200.Power supply 100 is communicated with voltage stabilizing IC1 by controller 200.The end of operating switch SW1 is connected with power supply 100, and the other end is connected with the input end of controller 200 and the input end of single-chip microcomputer IC2.The input end of controller 200 also is connected with the output terminal of single-chip microcomputer, and the output terminal of controller 200 is connected with voltage stabilizing IC1.Voltage stabilizing IC1 provides single-chip microcomputer work power supply.
As shown in Figure 3, controller comprises the first triode Q1 and the second triode Q2.The input end of the second triode Q2 is connected with operating switch SW1 by resistance R 2, the input end of the second triode Q2 also is connected with the output terminal of single-chip microcomputer IC2 by diode in series D1, resistance R 3, and the output terminal of the second triode Q2 is connected by resistance R 1 with the input end of the first triode Q1.The output terminal of the first triode Q1 is connected with the input end of voltage stabilizing IC3.
One end of operating switch connects with power end, and the other end is connected with resistance R 2 and connects the input end of the second triode Q2, also is connected with the input end of single-chip microcomputer by resistance R 4 simultaneously, and the two ends of resistance R 4 are parallel with capacitor C 1, resistance R 5 and voltage stabilizing diode D2.
The input end of voltage stabilizing IC1 and output terminal are connected to filter capacitor C1 and filter capacitor C2 respectively.
Resistance R 2, resistance R 3, resistance R 4, resistance R 5 get desired value.Diode D1 stops voltage to enter into single-chip microcomputer IC2, and voltage stabilizing diode D2 gives suitable input voltage of single-chip microcomputer IC2, and the 4th pin of single-chip microcomputer IC2 is the power supply of chip, connects voltage stabilizing IC1 output terminal, and the 5th pin is the ground end of chip.
Above circuit working process is: when operating switch SW1 is closed, the DC voltage of power end input is given the second triode Q2 saturation conduction voltage through resistance R 2, make the second triode Q2 conducting, the conducting of the Q1 of the Q2 second triode Q2 control simultaneously first triode Q1, the first also conducting of triode Q1 after the second triode Q2 conducting.Voltage stabilizing IC1 energized is started working after the first triode Q1 conducting, and output voltage V CC provides the working power of single-chip microcomputer IC2, starts working after the single-chip microcomputer IC2 energising.After single-chip microcomputer IC2 work, when an end that detects the 2nd pin and be attended operation switch SW 1 has the high level signal input, show that power supply connects, then single-chip microcomputer IC2 promptly is connected to the output terminal output high level signal of the second triode Q2, the conducting of pinning the second triode Q2 at the 1st pin.
When operating switch SW1 disconnects, because the 1st pin of single-chip microcomputer IC2 output high level makes the second triode Q2 still can keep conducting, circuit operate as normal still then.At this moment single-chip microcomputer IC2 detects the 2nd pin after low level, the control that whether stops to be subjected to single-chip microcomputer IC2 of circuit.When circuit will quit work, single-chip microcomputer IC2 only need allow the 1st pin output low level, and the second triode Q2 ends.After the second triode Q2 ended, the first triode Q1 also ended, and made voltage stabilizing IC1 and power end disconnect, and voltage stabilizing IC1 quits work, the entire circuit outage, and single-chip microcomputer IC2 quits work.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (3)
1. microcontroller power supply control circuit, the operating switch that the voltage stabilizing IC, two ends that comprises power supply, single-chip microcomputer, provides burning voltage for single-chip microcomputer is connected with voltage stabilizing IC with power supply respectively, it is characterized in that: also comprise controller, one end of described operating switch is connected with power supply, the other end is connected with the input end of controller, the input end of single-chip microcomputer, the input end of described controller also is connected with the output terminal of single-chip microcomputer, and the output terminal of described controller is connected with the input end of voltage stabilizing IC.
2. microcontroller power supply control circuit as claimed in claim 1, it is characterized in that: described controller is a transistor controller, comprise first triode (Q1) and second triode (Q2), the input end of described second triode (Q2) is connected with operating switch by resistance (R2), the input end of described second triode (Q2) also is connected with the output terminal of single-chip microcomputer by diode in series (D1), resistance (R3), and the output terminal of described second triode (Q2) is connected with the input end of first triode (Q1); The output terminal of described first triode (Q1) is connected with the input end of voltage stabilizing IC (3).
3. microcontroller power supply control circuit as claimed in claim 2 is characterized in that: the other end of described operating switch is connected with the input end of single-chip microcomputer (4) by parallel resistor (R4), voltage stabilizing diode (D2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200950822U CN201237718Y (en) | 2008-06-27 | 2008-06-27 | Power supply control circuit of single-chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200950822U CN201237718Y (en) | 2008-06-27 | 2008-06-27 | Power supply control circuit of single-chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201237718Y true CN201237718Y (en) | 2009-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200950822U Expired - Fee Related CN201237718Y (en) | 2008-06-27 | 2008-06-27 | Power supply control circuit of single-chip |
Country Status (1)
| Country | Link |
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| CN (1) | CN201237718Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937202A (en) * | 2010-09-30 | 2011-01-05 | 曹志才 | Key-press input module |
| CN104570871A (en) * | 2014-12-30 | 2015-04-29 | 上海力申科学仪器有限公司 | On-off circuit |
| CN104880984A (en) * | 2015-05-28 | 2015-09-02 | 阳信鼎信橡胶制品有限公司 | Remote intelligent irrigation control system |
-
2008
- 2008-06-27 CN CNU2008200950822U patent/CN201237718Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937202A (en) * | 2010-09-30 | 2011-01-05 | 曹志才 | Key-press input module |
| CN101937202B (en) * | 2010-09-30 | 2012-10-03 | 曹志才 | Key-press input module |
| CN104570871A (en) * | 2014-12-30 | 2015-04-29 | 上海力申科学仪器有限公司 | On-off circuit |
| CN104880984A (en) * | 2015-05-28 | 2015-09-02 | 阳信鼎信橡胶制品有限公司 | Remote intelligent irrigation control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 Termination date: 20170627 |