CN203786494U - Switch power supply zero-standby power consumption circuit - Google Patents
Switch power supply zero-standby power consumption circuit Download PDFInfo
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- CN203786494U CN203786494U CN201320873017.9U CN201320873017U CN203786494U CN 203786494 U CN203786494 U CN 203786494U CN 201320873017 U CN201320873017 U CN 201320873017U CN 203786494 U CN203786494 U CN 203786494U
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Abstract
A switch power supply zero-standby power consumption circuit relates to the switch power supply technical field, and comprises a load detection circuit and a control circuit; when the load detection circuit detects a load is connected to an output end of the switch power supply, the control circuit controls the commercial power to provide power for the switch power supply; when the load detection circuit detects no load is connected to the output end of the switch power supply, the control circuit controls the commercial power to stop providing power for the switch power supply; the control circuit comprises cascade a common emitter circuit, an optical coupler U4, a resistor R48, a fuse F1, a switch SW1 and a silicon controlled rectifier diode Q5; a discrete element, a triode and the silicon controlled rectifier diode are employed to realize zero-standby power consumption of the switch power supply under no-load condition; no integrated circuit is needed; the switch power supply zero-standby power consumption circuit is simple in circuit, low in cost, energy saving and environmental friendly.
Description
Technical field
The utility model relates to switch power technology field, particularly relates to a kind of Switching Power Supply zero stand-by power consumption circuit.
Background technology
Switching Power Supply is to utilize modern power electronics technology, and the time ratio that gauge tap pipe turns on and off maintains a kind of power supply of regulated output voltage, and Switching Power Supply generally controls IC by pulse-length modulation (PWM) and MOSFET forms.Along with development and the innovation of Power Electronic Technique, make switch power technology also in constantly innovation.At present, Switching Power Supply, with small-sized, light weight and high efficiency feature nearly all electronic equipment that is widely used, is the indispensable a kind of power mode of current electronics and information industry develop rapidly.
Due to the needs of energy-conserving and environment-protective, various countries launch respectively energy-conserving and environment-protective measure at present, the stand-by power consumption of Switching Power Supply is because it is applied and receive much concern widely, current Switching Power Supply stand-by power consumption major part also exists, fail to realize Zero-power-consumption standby, the scheme that part realizes zero stand-by power consumption needs integrated circuit control, and cost is higher.
Summary of the invention
The purpose of this utility model is to avoid weak point of the prior art and a kind of Switching Power Supply zero stand-by power consumption circuit is provided, this Switching Power Supply zero stand-by power consumption circuit simple in structure, with low cost, energy-conserving and environment-protective.
The purpose of this utility model is achieved through the following technical solutions:
A kind of Switching Power Supply zero stand-by power consumption circuit is provided, comprise load detecting circuit and control circuit, the test side A of load detecting circuit is connected with the output plus terminal OUT+ of Switching Power Supply, the output terminal B of load detecting circuit is connected with the controlled end C of control circuit, the power end D of control circuit meets the output plus terminal OUT+ of Switching Power Supply, the live wire L1 of the E termination civil power of control circuit, the F termination civil power of control circuit and zero line N1, the live wire L of the G termination Switching Power Supply of control circuit, the zero line N of the H termination Switching Power Supply of control circuit, when load detecting circuit detects while being connected to load between the output plus terminal OUT+ of Switching Power Supply and output negative terminal OUT-, control circuit control civil power is Switching Power Supply power supply, when load detecting circuit detects while not connecing load between the output plus terminal OUT+ of Switching Power Supply and output negative terminal OUT-, control circuit control civil power stops as Switching Power Supply power supply,
Control circuit is concrete, comprise the common emitter circuit of cascade, optocoupler U4, resistance R 48, fuse F1, switch SW 1 and controllable silicon diode Q5, the input end of the common emitter circuit of cascade is connected with the output terminal of load detecting circuit, the output terminal of the common emitter circuit of cascade is connected with the illuminator of optocoupler U4, the input end of one end of the light-receiving device of optocoupler U4 and controllable silicon diode Q5, one end of fuse F1 connects, the other end of fuse F1 is connected with the input end of civil power, the output terminal of controllable silicon diode Q5 is connected with the live wire of Switching Power Supply, the other end of the light-receiving device of optocoupler is connected with one end of resistance R 48, the other end of resistance R 48 is connected with the control end of controllable silicon diode Q5, switch SW 1 is for triggering controllable silicon diode Q5 conducting, the signal of the load detecting circuit receiving is converted into control signal by the common emitter circuit of cascade, be used for controlling optocoupler U4 work and then control controllable silicon diode Q5 work.
Wherein, load detecting circuit comprises the sample resistance for sampling output voltage.
Wherein, sample resistance comprises resistance R in parallel 36, resistance R 37, resistance R 38 and resistance R 43, and the input end of sample resistance is connected between the output negative terminal OUT-and ground of Switching Power Supply, the output terminal connection control circuit of sample resistance.
Wherein, the common emitter circuit of cascade comprises triode Q2, triode Q3, triode Q4, resistance R 41, resistance R 47, resistance R 46, resistance R 39, resistance R 45 and resistance R 40, one end of resistance R 41 is connected with ground, the base stage of the other end of resistance R 41 and triode Q2, one end of resistance R 47 connects, one end of the collector of triode Q2 and resistance R 46, the base stage of triode Q3 connects, one end of the collector of triode Q3 and resistance R 39, the base stage of triode Q4 connects, the emitter of triode Q3 is connected with one end of resistance R 40, the emitter of triode Q4 is connected with the negative pole of the illuminator of optocoupler U4, the other end of resistance R 47, the other end of resistance R 46, the other end of resistance R 39 all with the positive output end OUT+ of Switching Power Supply, one end of resistance R 45 connects, the other end of resistance R 45 is connected with the positive pole of the illuminator of optocoupler U4, the emitter of triode Q2, the collector of the other end of resistance R 40 and triode Q4 is all connected with the output negative terminal OUT-of Switching Power Supply.
Wherein, triode Q2 and triode Q3 are NPN type triode, and triode Q4 is positive-negative-positive triode.
The beneficial effects of the utility model: the utility model is realized zero stand-by power consumption of Switching Power Supply in non-loaded situation by discrete component, triode and controllable silicon diode etc., just can realize without integrated circuit, circuit is simple, with low cost, energy-conserving and environment-protective.
Brief description of the drawings
Utilize accompanying drawing to be described further utility model, but the embodiment in accompanying drawing does not form any restriction of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to the following drawings other accompanying drawing.
Fig. 1 is a kind of circuit block diagram of Switching Power Supply zero stand-by power consumption circuit.
Fig. 2 is a kind of circuit theory diagrams of Switching Power Supply zero stand-by power consumption circuit.
In figure, include:
1---load detecting circuit;
2---control circuit.
Embodiment
With the following Examples the utility model is further described.
A kind of Switching Power Supply zero stand-by power consumption circuit, as shown in Figure 1, comprise load detecting circuit 1 and control circuit 2, load detecting electricity, 1 test side A is connected with the output plus terminal OUT+ of Switching Power Supply, the output terminal B of load detecting circuit 1 is connected with the controlled end C of control circuit 2, the power end D of control circuit 2 meets the output plus terminal OUT+ of Switching Power Supply, the live wire L1 of the E termination civil power of control circuit 2, the F termination civil power of control circuit 2 and zero line N1, the live wire L of the G termination Switching Power Supply of control circuit 2, the zero line N of the H termination Switching Power Supply of control circuit 2, when load detecting circuit 1 detects while being connected to load between the output plus terminal OUT+ of Switching Power Supply and output negative terminal OUT-, it is Switching Power Supply power supply that control circuit 2 is controlled civil power, when load detecting circuit 1 detects while not connecing load between the output plus terminal OUT+ of Switching Power Supply and output negative terminal OUT-, control circuit 2 is controlled civil power and is stopped as Switching Power Supply power supply,
As shown in Figure 2, control circuit 2 is concrete, comprise the common emitter circuit of cascade, optocoupler U4, resistance R 48, fuse F1, switch SW 1 and controllable silicon diode Q5, the input end of the common emitter circuit of cascade is connected with the output terminal of load detecting circuit, the output terminal of the common emitter circuit of cascade is connected with the illuminator of optocoupler U4, the input end of one end of the light-receiving device of optocoupler U4 and controllable silicon diode Q5, one end of fuse F1 connects, the other end of fuse F1 is connected with the input end of civil power, the output terminal of controllable silicon diode Q5 is connected with the live wire of Switching Power Supply, the other end of the light-receiving device of optocoupler is connected with one end of resistance R 48, the other end of resistance R 48 is connected with the control end of controllable silicon diode Q5, switch SW 1 is for triggering controllable silicon diode Q5 conducting, the signal of the load detecting circuit receiving is converted into control signal by the common emitter circuit of cascade, be used for controlling optocoupler U4 work and then control controllable silicon diode Q5 work.
The present embodiment is realized zero stand-by power consumption of Switching Power Supply in non-loaded situation by discrete component, triode and controllable silicon diode etc., just can realize without integrated circuit, and circuit is simple, with low cost, energy-conserving and environment-protective.
Wherein, load detecting circuit comprises the sample resistance for sampling output voltage.
Concrete, as shown in Figure 2, sample resistance comprises resistance R in parallel 36, resistance R 37, resistance R 38 and resistance R 43, the input end of sample resistance is connected between the output negative terminal OUT-and ground of Switching Power Supply, the output terminal connection control circuit of sample resistance.
Concrete, as shown in Figure 2, the common emitter circuit of cascade comprises triode Q2, triode Q3, triode Q4, resistance R 41, resistance R 47, resistance R 46, resistance R 39, resistance R 45 and resistance R 40, one end of resistance R 41 is connected with ground, the base stage of the other end of resistance R 41 and triode Q2, one end of resistance R 47 connects, one end of the collector of triode Q2 and resistance R 46, the base stage of triode Q3 connects, one end of the collector of triode Q3 and resistance R 39, the base stage of triode Q4 connects, and the emitter of triode Q3 is connected with one end of resistance R 40, and the emitter of triode Q4 is connected with the negative pole of the illuminator of optocoupler U4, the other end of resistance R 47, the other end of resistance R 46, the other end of resistance R 39 all with the positive output end OUT+ of Switching Power Supply, one end of resistance R 45 connects, and the other end of resistance R 45 is connected with the positive pole of the illuminator of optocoupler U4, the emitter of triode Q2, the collector of the other end of resistance R 40 and triode Q4 is all connected with the output negative terminal OUT-of Switching Power Supply.
Wherein, triode Q2 and triode Q3 are NPN type triode, and triode Q4 is positive-negative-positive triode.
Civil power zero line is denoted as N.
The principle of work of the present embodiment is as follows:
As shown in Figure 2, during by the upper input ac voltage 90-264VAC voltage of civil power live wire L1, civil power zero line N, press switch SW 1, controllable silicon diode Q5 is triggered, electric current flows to the live wire L of Switching Power Supply from civil power live wire L1, on the live wire L of Switching Power Supply, zero line N line, have voltage, therefore Switching Power Supply is started working, and output plus terminal OUT+, the output negative terminal OUT-of Switching Power Supply have Voltage-output.
In the time that the output terminal of Switching Power Supply accesses load, output negative terminal OUT-has negative level, its level is low, base stage by triode Q2 after sample resistance R36, R37, R38, R43 becomes high level, the level of the base stage of the collector of triode Q3 and triode Q4 is high level, now, triode Q4, optocoupler U4 and controllable silicon diode Q5 all keep conducting state, and civil power continues as Switching Power Supply power supply.
In the time that the output terminal of Switching Power Supply does not connect load, the voltage of output negative terminal OUT-is 0, therefore the base stage by triode Q2 after sample resistance R36, R37, R38, R43 becomes low level, the level of the base stage output of the collector of triode Q3 and triode Q4 is low level, now triode Q4 cut-off, not conducting of optocoupler U4, controllable silicon diode Q5 trigger action, voltage on the live wire L of Switching Power Supply and zero line N is turn-offed, and Switching Power Supply quits work, and realizing stand-by power consumption is zero.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not restriction to the utility model protection domain; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.
Claims (1)
1. a Switching Power Supply zero stand-by power consumption circuit, it is characterized in that: comprise load detecting circuit and control circuit, the test side A of load detecting circuit is connected with the output plus terminal OUT+ of Switching Power Supply, the output terminal B of load detecting circuit is connected with the controlled end C of control circuit, the power end D of control circuit meets the output plus terminal OUT+ of Switching Power Supply, the live wire L1 of the E termination civil power of control circuit, the F termination civil power of control circuit and zero line N1, the live wire L of the G termination Switching Power Supply of control circuit, the zero line N of the H termination Switching Power Supply of control circuit, when load detecting circuit detects while being connected to load between the output plus terminal OUT+ of Switching Power Supply and output negative terminal OUT-, control circuit control civil power is Switching Power Supply power supply, when load detecting circuit detects while not connecing load between the output plus terminal OUT+ of Switching Power Supply and output negative terminal OUT-, control circuit control civil power stops as Switching Power Supply power supply,
Control circuit is concrete, comprise the common emitter circuit of cascade, optocoupler U4, resistance R 48, fuse F1, switch SW 1 and controllable silicon diode Q5, the input end of the common emitter circuit of cascade is connected with the output terminal of load detecting circuit, the output terminal of the common emitter circuit of cascade is connected with the illuminator of optocoupler U4, the input end of one end of the light-receiving device of optocoupler U4 and controllable silicon diode Q5, one end of fuse F1 connects, the other end of fuse F1 is connected with the input end of civil power, the output terminal of controllable silicon diode Q5 is connected with the live wire of Switching Power Supply, the other end of the light-receiving device of optocoupler is connected with one end of resistance R 48, the other end of resistance R 48 is connected with the control end of controllable silicon diode Q5, switch SW 1 is for triggering controllable silicon diode Q5 conducting, the signal of the load detecting circuit receiving is converted into control signal by the common emitter circuit of cascade, be used for controlling optocoupler U4 work and then control controllable silicon diode Q5 work.
2. a kind of Switching Power Supply zero stand-by power consumption circuit as claimed in claim 1, is characterized in that: load detecting circuit comprises the sample resistance for sampling output voltage.
3. a kind of Switching Power Supply zero stand-by power consumption circuit as claimed in claim 2, it is characterized in that: sample resistance comprises resistance R in parallel 36, resistance R 37, resistance R 38 and resistance R 43, the input end of sample resistance is connected between the output negative terminal OUT-and ground of Switching Power Supply, the output terminal connection control circuit of sample resistance.
4. a kind of Switching Power Supply zero stand-by power consumption circuit as claimed in claim 1, is characterized in that: the common emitter circuit of cascade comprises triode Q2, triode Q3, triode Q4, resistance R 41, resistance R 47, resistance R 46, resistance R 39, resistance R 45 and resistance R 40, one end of resistance R 41 is connected with ground, the base stage of the other end of resistance R 41 and triode Q2, one end of resistance R 47 connects, one end of the collector of triode Q2 and resistance R 46, the base stage of triode Q3 connects, one end of the collector of triode Q3 and resistance R 39, the base stage of triode Q4 connects, and the emitter of triode Q3 is connected with one end of resistance R 40, and the emitter of triode Q4 is connected with the negative pole of the illuminator of optocoupler U4, the other end of resistance R 47, the other end of resistance R 46, the other end of resistance R 39 all with the positive output end OUT+ of Switching Power Supply, one end of resistance R 45 connects, and the other end of resistance R 45 is connected with the positive pole of the illuminator of optocoupler U4, the emitter of triode Q2, the collector of the other end of resistance R 40 and triode Q4 is all connected with the output negative terminal OUT-of Switching Power Supply.
5. a kind of Switching Power Supply zero stand-by power consumption circuit as claimed in claim 4, is characterized in that: triode Q2 and triode Q3 are NPN type triode, and triode Q4 is positive-negative-positive triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320873017.9U CN203786494U (en) | 2013-12-28 | 2013-12-28 | Switch power supply zero-standby power consumption circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320873017.9U CN203786494U (en) | 2013-12-28 | 2013-12-28 | Switch power supply zero-standby power consumption circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203786494U true CN203786494U (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320873017.9U Expired - Fee Related CN203786494U (en) | 2013-12-28 | 2013-12-28 | Switch power supply zero-standby power consumption circuit |
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| Country | Link |
|---|---|
| CN (1) | CN203786494U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519561A (en) * | 2018-05-04 | 2018-09-11 | 南京天加环境科技有限公司 | A kind of air-conditioning system power quality detecting system and method |
| CN110621104A (en) * | 2019-05-27 | 2019-12-27 | 广东明丰电源电器实业有限公司 | Circuit for reducing standby power consumption and electronic equipment |
-
2013
- 2013-12-28 CN CN201320873017.9U patent/CN203786494U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519561A (en) * | 2018-05-04 | 2018-09-11 | 南京天加环境科技有限公司 | A kind of air-conditioning system power quality detecting system and method |
| CN110621104A (en) * | 2019-05-27 | 2019-12-27 | 广东明丰电源电器实业有限公司 | Circuit for reducing standby power consumption and electronic equipment |
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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 |
Granted publication date: 20140820 Termination date: 20181228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |