CN201178382Y - Electric power change-over circuit - Google Patents
Electric power change-over circuit Download PDFInfo
- Publication number
- CN201178382Y CN201178382Y CNU2008201047486U CN200820104748U CN201178382Y CN 201178382 Y CN201178382 Y CN 201178382Y CN U2008201047486 U CNU2008201047486 U CN U2008201047486U CN 200820104748 U CN200820104748 U CN 200820104748U CN 201178382 Y CN201178382 Y CN 201178382Y
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- power
- unit
- switching circuit
- optocoupler
- output unit
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Abstract
The utility model relates to a power switching circuit used in a power adapter or a charger. The power switching circuit comprises an input rectifying unit (1), an EMI filtering unit (2), an energy transformation unit (3) and a DC output unit (4) which are connected in sequence, a PWM control unit (5) connected to the energy transformation unit (3) and the DC output unit (4), and an intelligent control circuit (6) connected between the input rectifying unit (1) and the PWM control unit (5), and connected to the DC output unit (4). The intelligent control circuit (6) is added, so that the power switching circuit has no power consumption when no electronic product is connected to the power switching circuit or the load current is smaller than the specified current, even though the power adapter or the charger is plugged in a power socket, thereby reducing the power consumption of the power adapter or the charger.
Description
Technical field
The utility model relates to power-switching circuit, more particularly, relates to a kind of novel power supply change-over circuit with intelligence control circuit.
Background technology
In daily life, people need charge to mobile electronic products such as mobile phone, notebook computers in one week usually once or twice.Yet when power supply did not connect electronic product, if power supply adaptor or charger are inserted in the supply socket, power-switching circuit wherein still can electric consumption.Both made under obsolete situation, traditional power supply all has a stand-by power supply usually.
As shown in Figure 1, general power-switching circuit comprises input rectifying unit 1, EMI filter unit 2, energy conversion unit 3, DC output unit 4 and PWM control unit 5, wherein input rectifying unit 1, EMI filter unit 2, energy conversion unit 3, DC output unit 4 connect successively, and PWM control unit 5 is connected with DC output unit 4 with energy conversion unit 3.Fig. 2 is the circuit theory diagrams of this power-switching circuit, and sort circuit is not when connecting electronic product, if also be inserted in the supply socket, this circuit is electric consumption always.
Therefore, need a kind of both having made when not connecting load or load current less than predetermined electric current, if power supply adaptor or charger be inserted in the supply socket not can electric consumption power-switching circuit.
The utility model content
The technical problems to be solved in the utility model is, by increasing an intelligence control circuit, provides a kind of zero power-switching circuit that consumes.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of power-switching circuit, be used for power supply adaptor or charger, comprise input rectifying unit, EMI filter unit, energy conversion unit, the DC output unit that connects successively and be connected to energy conversion unit and the PWM control unit of DC output unit, it also comprises the intelligence control circuit that is connected to input rectifying unit and PWM control unit, and intelligence control circuit is also connected to the DC output unit.
In power-switching circuit described in the utility model, described intelligence control circuit comprises the optocoupler U3 that is connected to control IC U6, the triode Q1 that is connected with optocoupler U3 and relay K 1, the voltage stabilizing didoe D2 that is connected relay K 1 two ends and physical switch S1.
In power-switching circuit described in the utility model, described intelligence control circuit also comprises the current-limiting resistance R18 that is connected between control IC U6 and the optocoupler U3, be connected current-limiting resistance R4 between optocoupler U3 and the triode Q1 base stage, be connected resistance R 3 between triode Q1 base stage and the ground, be connected current-limiting resistance R5 and R6 between optocoupler U3 and the relay K 1.
In power-switching circuit described in the utility model, the input voltage of input rectifying unit is that 100V is to the 240V alternating voltage.
Implement power-switching circuit of the present utility model, has following beneficial effect: by increasing an intelligence control circuit, make when not connecting electronic product or load current less than predetermined electric current, power supply adaptor or charger were inserted in the supply socket, power-switching circuit does not have electrical source consumption yet, reduces the loss of power of power supply adaptor or charger with this.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the system block diagram of traditional power-switching circuit;
Fig. 2 is the schematic diagram of traditional power-switching circuit;
Fig. 3 is the system block diagram of power-switching circuit of the present utility model;
Fig. 4 is the schematic diagram of power-switching circuit of the present utility model.
Embodiment
As shown in Figure 3, there is shown the system block diagram of the utility model power-switching circuit.Power-switching circuit shown in the figure comprises interconnective input rectifying unit 1, EMI filter unit 2, energy conversion unit 3, DC output unit 4 and is connected to energy conversion unit 3 and the PWM control unit 5 of DC output unit 4, in addition, the utility model power-switching circuit also comprises the intelligence control circuit 6 that is connected to input rectifying unit (1) and PWM control unit 5, and intelligence control circuit 6 is also connected to DC output unit 4 these innovative point of the present utility model just places.By increasing an intelligence control circuit 6, make that when not connecting electronic product or load current power supply adaptor or charger were inserted in the supply socket, and power-switching circuit does not have electrical source consumption yet less than predetermined electric current.When the out-put supply short time was under certain level, intelligence control circuit 6 will cut off elementary input power supply from high-pressure section.After power supply was cut off, the utility model had increased a physical switch S1, so that reclose power supply in needs, after power connection, power-switching circuit of the present utility model can be as traditional power-switching circuit operate as normal.
Fig. 4 is the schematic diagram of power-switching circuit of the present utility model.Input rectifying unit 1 shown in the figure, EMI filter unit 2, energy conversion unit 3, DC output unit 4 and PWM control unit 5 have been the suitable mature technique in this area, do not repeat them here.Intelligence control circuit 6 of the present utility model comprises the optocoupler U3 that is connected to control IC U6, the triode Q1 that is connected with optocoupler U3 and relay K 1, the voltage stabilizing didoe D2 that is connected relay K 1 two ends and physical switch S1, also comprises the current-limiting resistance R18 that is connected between control IC U6 and the optocoupler U3, is connected current-limiting resistance R4 between optocoupler U3 and the triode Q1 base stage, is connected resistance R 3 between triode Q1 base stage and the ground, is connected current-limiting resistance R5 and R6 between optocoupler U3 and the relay K 1.The input voltage of the input rectifying unit 1 shown in the figure is 100 to the 240V alternating voltage.When not connecting load or load current less than predetermined electric current and when keeping a bit of time, under the control of control IC U6, optocoupler U3 is switched on, and then can make triode Q1 conducting, triode Q1 control relay K1 disconnects then, so just cut off elementary power supply input, just do not had the loss of power in the circuit.Be provided with a physical switch S1 at relay K 1 two ends in the circuit, in needs, can use this physical switch S1 to reclose power supply.Through experiment showed, under non-loaded situation under 115V/60Hz and 230V/50Hz condition, the loss of power of power-switching circuit of the present utility model all is zero.
Therefore, by increasing an intelligence control circuit 6, make power-switching circuit when not connecting electronic product or load current less than predetermined electric current, power supply adaptor or charger were inserted in the supply socket, power-switching circuit does not have any power source consumption yet, therefore the utility model is the power-switching circuit of a new generation, is used for power supply adaptor or charger, stand-by loss can be reduced to zero.
Claims (4)
1, a kind of power-switching circuit, be used for power supply adaptor or charger, comprise input rectifying unit (1), EMI filter unit (2), energy conversion unit (3), the DC output unit (4) that connects successively and be connected to energy conversion unit (3) and the PWM control unit (5) of DC output unit (4), it is characterized in that, also comprise the intelligence control circuit (6) that is connected to input rectifying unit (1) and PWM control unit (5), intelligence control circuit (6) is also connected to DC output unit (4).
2, power-switching circuit according to claim 1, it is characterized in that described intelligence control circuit (6) comprises the optocoupler U3 that is connected to control IC U6, the triode Q1 that is connected with optocoupler U3 and relay K 1, the voltage stabilizing didoe D2 that is connected relay K 1 two ends and physical switch S1.
3, power-switching circuit according to claim 2, it is characterized in that described intelligence control circuit (6) also comprises the current-limiting resistance R18 that is connected between control IC U6 and the optocoupler U3, be connected current-limiting resistance R4 between optocoupler U3 and the triode Q1 base stage, be connected resistance R 3 between triode Q1 base stage and the ground, be connected current-limiting resistance R5 and R6 between optocoupler U3 and the relay K 1.
4, power-switching circuit according to claim 1 is characterized in that, the input voltage of input rectifying unit (1) is that 100V is to the 240V alternating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201047486U CN201178382Y (en) | 2008-04-18 | 2008-04-18 | Electric power change-over circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201047486U CN201178382Y (en) | 2008-04-18 | 2008-04-18 | Electric power change-over circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201178382Y true CN201178382Y (en) | 2009-01-07 |
Family
ID=40218404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201047486U Expired - Fee Related CN201178382Y (en) | 2008-04-18 | 2008-04-18 | Electric power change-over circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201178382Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075073A (en) * | 2010-12-24 | 2011-05-25 | 马丽娟 | Novel electro-magnetic interference (EMI) filtering capacitance loss reducing circuit |
| CN102780405A (en) * | 2012-08-15 | 2012-11-14 | 陈才华 | Power adapter capable of suppressing electromagnetic interference |
-
2008
- 2008-04-18 CN CNU2008201047486U patent/CN201178382Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075073A (en) * | 2010-12-24 | 2011-05-25 | 马丽娟 | Novel electro-magnetic interference (EMI) filtering capacitance loss reducing circuit |
| CN102780405A (en) * | 2012-08-15 | 2012-11-14 | 陈才华 | Power adapter capable of suppressing electromagnetic interference |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090107 Termination date: 20140418 |