CN201533242U - Circuit capable of reducing standby power consumption and television with same - Google Patents
Circuit capable of reducing standby power consumption and television with same Download PDFInfo
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- CN201533242U CN201533242U CN2009201323279U CN200920132327U CN201533242U CN 201533242 U CN201533242 U CN 201533242U CN 2009201323279 U CN2009201323279 U CN 2009201323279U CN 200920132327 U CN200920132327 U CN 200920132327U CN 201533242 U CN201533242 U CN 201533242U
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- 238000003079 width control Methods 0.000 claims abstract description 38
- 239000003381 stabilizer Substances 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 14
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- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000007704 transition Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 230000002950 deficient Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to a circuit capable of reducing standby power consumption and a television with the same. The circuit comprises a direct current conversion circuit, a pulse width control circuit and a voltage feedback circuit, wherein the pulse width control circuit is connected with an input end of the direct current conversion circuit, the voltage feedback circuit is connected with an output end of the direct current conversion circuit and a feedback signal input end of the pulse width control circuit simultaneously and used for providing feedback control signals to the pulse width control circuit, the voltage feedback circuit comprises a conversion circuit which is used for providing standby voltage feedback signals according to standby signals, and an input end of the conversion circuit is connected with a standby signal output end (Ps_on/off). The circuit is simple in structure and can reduce standby power consumption greatly.
Description
Technical field
The utility model relates to the reduction voltage circuit technical field, more particularly, relates to a kind of circuit that TV set circuit reduces stand-by power consumption that is used for.
Background technology
In electronic age, electrical equipment increasingly competitive, ripe gradually along with Digital Television market, especially country advocate energy-saving and emission-reduction, and the power consumption and the reliability of TV more and more are subject to people's attention.In the prior art, when the television set operate as normal, it provides the direct current of 12V to power to TV motherboard by power panel usually, the voltage that only needs 3.3v during the mainboard standby, therefore during standby, TV motherboard is reduced to 3.3V by LDO circuit or DC/DC conversion with 12V again, but, pressure reduction is up to 8.7v, it brings the voltage transitions power loss, and this loss is very little with respect to the work power consumption when operate as normal, but relative chip circuit power consumption influence is very big when standby, influence to stand-by power consumption is also very big, very wastes resource.
The utility model content
The technical problems to be solved in the utility model is that big at the above-mentioned stand-by power consumption of prior art, the defective of waste resource provides a kind of circuit that reduces stand-by power consumption.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of circuit that reduces stand-by power consumption, comprise DC converting circuit, the pulse width control circuit that links to each other with described DC converting circuit input, with the voltage feedback circuit that is used for providing feedback control signal that links to each other simultaneously to described pulse width control circuit with the feedback signal input of the output of described DC converting circuit and described pulse width control circuit, it is characterized in that, described voltage feedback circuit comprises when being used for standby provides the change-over circuit of standby voltage feedback signal according to standby signal to it, and the input of described change-over circuit links to each other with standby signal output Ps_on/off.
In the circuit of reduction stand-by power consumption described in the utility model, described DC converting circuit comprises transformer, diode D1, and the filter circuit that the direct current after the rectification is carried out transformation, filter circuit comprise capacitor C 1, C2, C3 in parallel and be connected in C1 and C2 between inductance L 951.
In the circuit of reduction stand-by power consumption described in the utility model, described pulse width control circuit comprises pulse width control chip, diode D2, current-limiting resistance R7, reaches filter capacitor C4, the power end of described pulse width control chip links to each other with the negative electrode of diode D2 by capacitor C 4, and the anode of diode D2 links to each other with the simple of transformer by resistance R 7.
In the circuit of reduction stand-by power consumption described in the utility model, described voltage feedback circuit comprises optocoupler PC817, voltage stabilizing chip KA431, capacitor C 5, reaches resistance R 1, R2, R6, the anode of the light-emitting diode of optocoupler links to each other with the output of described DC converting circuit by resistance R 6, its negative electrode is by voltage stabilizing chip KA431 ground connection, the light-sensitive device of optocoupler links to each other with the feedback end of pulse width control chip, also by resistance R 1, the R2 ground connection of series connection, capacitor C 5 is in parallel with the light-sensitive device of optocoupler for the output of DC converting circuit.
In the circuit of reduction stand-by power consumption described in the utility model, described change-over circuit comprises the first triode Q1, the second triode Q2, resistance R 3, R4, and voltage-stabiliser tube Z1, the base stage of the first triode Q1 links to each other with standby signal output (Ps_on/off) by resistance R 3, its grounded emitter, its collector electrode links to each other with the output of DC converting circuit by resistance R 4, its collector electrode also links to each other with the base stage of the second triode Q2, the grounded emitter of the second triode Q2, its collector electrode links to each other with the anode of voltage-stabiliser tube Z1, and the negative electrode of voltage-stabiliser tube Z1 links to each other with the negative electrode of the light-emitting diode of optocoupler.
In the circuit of reduction stand-by power consumption described in the utility model, the described first triode Q1 and the second triode Q2 are the NPN type.
In order to solve the problems of the technologies described above, the utility model also provides a kind of television set with above-mentioned reduction stand-by power consumption, comprise DC converting circuit, the pulse width control circuit that links to each other with described DC converting circuit input, with the voltage feedback circuit that is used for providing feedback control signal that links to each other simultaneously to described pulse width control circuit with the feedback signal input of the output of described DC converting circuit and described pulse width control circuit, it is characterized in that, described voltage feedback circuit comprises when being used for standby provides the change-over circuit of standby voltage feedback signal according to standby signal to it, the input of described change-over circuit links to each other with standby signal output Ps_on/off, and the output of described DC converting circuit links to each other with TV motherboard.
In above-mentioned television set, described voltage feedback circuit comprises optocoupler PC817, voltage stabilizing chip KA431, reaches resistance R 1, R2, R6, the anode of the light-emitting diode of optocoupler links to each other with the output of described DC converting circuit by resistance R 6, its negative electrode is by voltage stabilizing chip KA431 ground connection, the light-sensitive device of optocoupler links to each other with the feedback signal input of pulse width control circuit, and the output of DC converting circuit is resistance R 1, the R2 ground connection by connecting also.
In above-mentioned television set, described change-over circuit comprises the first triode Q1, the second triode Q2, resistance R 3, R4, reaches voltage-stabiliser tube Z1, the base stage of the first triode Q1 links to each other with standby signal output (Ps_on/off) by resistance R 3, its grounded emitter, its collector electrode links to each other with the output of DC converting circuit by resistance R 4, its collector electrode also links to each other with the base stage of the second triode Q2, the grounded emitter of the second triode Q2, its collector electrode links to each other with the anode of voltage-stabiliser tube Z1, and the negative electrode of voltage-stabiliser tube Z1 links to each other with the negative electrode of the light-emitting diode of optocoupler.
Implement a kind of circuit that reduces stand-by power consumption of the present utility model, its output feedback signal when change-over circuit makes standby in the voltage feedback circuit, thereby make pulse width control circuit carry out pulse-width modulation, further make DC converting circuit output low voltage, thereby the reduction stand-by power consumption has been saved resource.
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 structural representation of circuit application on television set of the utility model stand-by power consumption;
Fig. 2 is the structural representation of the circuit of the utility model stand-by power consumption;
Fig. 3 is the circuit diagram of circuit one preferred embodiment of the utility model stand-by power consumption.
Embodiment
The utility model provides the circuit that reduces stand-by power consumption, and the output high voltage was converted to output low voltage when standby when it made entire circuit by operate as normal by change-over circuit in the voltage feedback circuit, to reduce stand-by power consumption.
Referring to Fig. 2, it reduces the structural representation of the circuit of stand-by power consumption for the utility model, the circuit of the reduction stand-by power consumption that the utility model provides comprises DC converting circuit, the pulse width control circuit that links to each other with described DC converting circuit input, with the voltage feedback circuit that is used for providing feedback control signal that links to each other simultaneously to described pulse width control circuit with the feedback signal input of the output of described DC converting circuit and described pulse width control circuit, described voltage feedback circuit comprises when being used for standby provides the change-over circuit of standby voltage feedback signal according to standby signal to it, and the input of described change-over circuit links to each other with standby signal output Ps_on/off.
Referring to Fig. 3, it reduces the circuit diagram of circuit one preferred embodiment of stand-by power consumption for the utility model.In Fig. 3, DC converting circuit comprises transformer T1, diode D1, reaches filter circuit, filter circuit comprises capacitor C 1 in parallel, C2, C3, reaches the inductance L 951 that is connected between C1 and the C2, the input termination Vdc of transformer, Vdc is the direct current after rectification, and it is by the transformer step-down, and diode D1 intercepts the voltage of transformer output, then, L, C filter circuit carry out filtering.Pulse width control circuit comprises pulse width control chip, diode D2, current-limiting resistance R7, reaches filter capacitor C4, the power end VCC of pulse width control chip links to each other with the negative electrode of diode D2 by capacitor C 4, and the anode of diode D2 links to each other with the simple of transformer by resistance R 7.The pulse width control chip is preferably FSQ0765, and its feedback end links to each other with voltage feedback circuit.Voltage feedback circuit comprises optocoupler PC817, capacitor C 5, voltage stabilizing chip KA431, reaches resistance R 1, R2, R6, the anode of the light-emitting diode of optocoupler links to each other with the output end vo ut of described DC converting circuit by resistance R 6, its negative electrode is by voltage stabilizing chip KA431 ground connection, the light-sensitive device of optocoupler links to each other with the feedback end (pin 4) of pulse width control chip, capacitor C 5 is in parallel with the light-sensitive device of optocoupler, and capacitor C 5 can realize the voltage of optocoupler output is carried out the effect that phase shift delays.The output of DC converting circuit is resistance R 1, the R2 ground connection by connecting also.
Change-over circuit comprises the first triode Q1, the second triode Q2, resistance R 3, R4, reaches voltage-stabiliser tube Z1.The base stage of the first triode Q1 links to each other with standby signal output (Ps_on/off) by resistance R 3, its grounded emitter, its collector electrode links to each other with the output of DC converting circuit by resistance R 4, its collector electrode also links to each other with the base stage of the second triode Q2, the grounded emitter of the second triode Q2, its collector electrode links to each other with the anode of voltage-stabiliser tube Z1, and the negative electrode of voltage-stabiliser tube Z1 links to each other with the negative electrode of the light-emitting diode of optocoupler.Wherein, the first triode Q1 and the second triode Q2 are the NPN type.
The utility model also provides a kind of television set with circuit of above-mentioned reduction stand-by power consumption, and the output of the circuit of above-mentioned reduction stand-by power consumption links to each other with TV motherboard.Fig. 1 is the structural representation of circuit application on television set of the utility model stand-by power consumption, in conjunction with Fig. 1, Fig. 2, and Fig. 3 to tell about the operation principle of the circuit of whole reduction stand-by power consumption and described television set as follows:
It is when operate as normal, the output of power supply plate 12v give TV motherboard, when television standby, its output 5v give mainboard, mainboard is reduced to 3.3V by LDO or DC/DC change-over circuit with 5V again, because voltage transitions pressure reduction has reduced (5v-3.3v=1.7v) on the mainboard, the loss of transition loss when directly reducing to 3.3V by 12V in mainboard in the prior art reduces greatly.It by the operation principle that 12V reduces to 5V is:
When operate as normal, the Ps_on/off signal of standby signal output output is a high level, the first triode Q1 conducting, and the second triode Q2 ends, and then voltage stabilizing chip KA431 still makes Vout output 12V voltage; When the television set standby, the Ps_on/off signal is a low level, the first triode Q1 ends, the second triode Q2 conducting, then voltage-stabiliser tube Z1 conducting, voltage-stabiliser tube Z1 is equivalent to make voltage stabilizing chip KA431 short circuit, KA431 is ineffective for the voltage stabilizing chip, optocoupler PC817 front end electric current substantially constant, the then light-sensitive device conducting of optocoupler and make feedback fixing, the feedback end of pulse width control chip, be that pin 4 is equivalent to ground connection, it makes pulse width control chip FSQ0765 carry out pulse width control, and the switch controlled pulse duty factor in it makes its output voltage stabilization, the Vcc end of FSQ0765 is shaken in certain voltage range, thereby its pin 3 make the stable voltage of output end vo ut output of DC converting circuit by the transformer of DC converting circuit.Preferably, voltage-stabiliser tube Z1 selects 1/2w for use, and the voltage-stabiliser tube of 3.6v is suitably regulated Z1 voltage stabilizing value, can make output end vo ut export the voltage of average 5V.Because when the Ps_on/off signal is low level during standby, be output as the concussion waveform of 4.7 ~ 5.2v, this moment, the supply power voltage of FSQ0765 was lower, according to its self characteristics, switch controlled pulse duty factor in it makes its output voltage stabilization, the Vcc of FSQ0765 is shaken between 8v ~ 12v, further make Vout output 5v voltage.Certainly, change the model of voltage-stabiliser tube Z1, can make the different magnitude of voltage of output end vo ut output of circuit.
Therefore during standby, mainboard only need be reduced to stable 3.3v voltage from 5V, and mainboard can operate as normal when making standby, and greatly reduces stand-by power consumption, reaches higher efficiency classification standard easilier.
Claims (9)
1. circuit that reduces stand-by power consumption, comprise DC converting circuit, the pulse width control circuit that links to each other with described DC converting circuit input, with the voltage feedback circuit that is used for providing feedback control signal that links to each other simultaneously to described pulse width control circuit with the feedback signal input of the output of described DC converting circuit and described pulse width control circuit, it is characterized in that, described voltage feedback circuit comprises when being used for standby provides the change-over circuit of standby voltage feedback signal according to standby signal to it, and the input of described change-over circuit links to each other with standby signal output Ps_on/off.
2. the circuit of reduction stand-by power consumption according to claim 1, it is characterized in that, described DC converting circuit comprises transformer, diode D1, and the filter circuit that the direct current after the rectification is carried out transformation, filter circuit comprise capacitor C 1, C2, C3 in parallel and be connected in C1 and C2 between inductance L 951.
3. the circuit of reduction stand-by power consumption according to claim 2, it is characterized in that, described pulse width control circuit comprises pulse width control chip, diode D2, current-limiting resistance R7, reaches filter capacitor C4, the power end of described pulse width control chip links to each other with the negative electrode of diode D2 by capacitor C 4, and the anode of diode D2 links to each other with the simple of transformer by resistance R 7.
4. the circuit of reduction stand-by power consumption according to claim 3, it is characterized in that, described voltage feedback circuit comprises optocoupler PC817, capacitor C 5, voltage stabilizing chip KA431, reaches resistance R 1, R2, R6, the anode of the light-emitting diode of optocoupler links to each other with the output of described DC converting circuit by resistance R 6, its negative electrode is by voltage stabilizing chip KA431 ground connection, the light-sensitive device of optocoupler links to each other with the feedback end of pulse width control chip, also by resistance R 1, the R2 ground connection of series connection, capacitor C 5 is in parallel with the light-sensitive device of optocoupler for the output of DC converting circuit.
5. according to the circuit of claim 1 or 4 described reduction stand-by power consumptions, it is characterized in that, described change-over circuit comprises the first triode Q1, the second triode Q2, resistance R 3, R4, and voltage-stabiliser tube Z1, the base stage of the first triode Q1 links to each other with standby signal output Ps_on/off by resistance R 3, its grounded emitter, its collector electrode links to each other with the output of DC converting circuit by resistance R 4, its collector electrode also links to each other with the base stage of the second triode Q2, the grounded emitter of the second triode Q2, its collector electrode links to each other with the anode of voltage-stabiliser tube Z1, and the negative electrode of voltage-stabiliser tube Z1 links to each other with the negative electrode of the light-emitting diode of optocoupler.
6. the circuit of reduction stand-by power consumption according to claim 5 is characterized in that, the described first triode Q1 and the second triode Q2 are the NPN type.
7. television set with circuit of the described reduction stand-by power consumption of claim 1, it is characterized in that, comprise DC converting circuit, the pulse width control circuit that links to each other with described DC converting circuit input, with the voltage feedback circuit that is used for providing feedback control signal that links to each other simultaneously to described pulse width control circuit with the feedback signal input of the output of described DC converting circuit and described pulse width control circuit, it is characterized in that, described voltage feedback circuit comprises when being used for standby provides the change-over circuit of standby voltage feedback signal according to standby signal to it, the input of described change-over circuit links to each other with standby signal output Ps_on/off, and the output of described DC converting circuit links to each other with TV motherboard.
8. television set according to claim 7, it is characterized in that, described voltage feedback circuit comprises optocoupler PC817, voltage stabilizing chip KA431, reaches resistance R 1, R2, R6, the anode of the light-emitting diode of optocoupler links to each other with the output of described DC converting circuit by resistance R 6, its negative electrode is by voltage stabilizing chip KA431 ground connection, the light-sensitive device of optocoupler links to each other with the feedback signal input of pulse width control circuit, and the output of DC converting circuit is resistance R 1, the R2 ground connection by connecting also.
9. television set according to claim 8, it is characterized in that, described change-over circuit comprises the first triode Q1, the second triode Q2, resistance R 3, R4, and voltage-stabiliser tube Z1, the base stage of the first triode Q1 links to each other with standby signal output Ps_on/off by resistance R 3, its grounded emitter, its collector electrode links to each other with the output of DC converting circuit by resistance R 4, its collector electrode also links to each other with the base stage of the second triode Q2, the grounded emitter of the second triode Q2, its collector electrode links to each other with the anode of voltage-stabiliser tube Z1, and the negative electrode of voltage-stabiliser tube Z1 links to each other with the negative electrode of the light-emitting diode of optocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201323279U CN201533242U (en) | 2009-06-01 | 2009-06-01 | Circuit capable of reducing standby power consumption and television with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201323279U CN201533242U (en) | 2009-06-01 | 2009-06-01 | Circuit capable of reducing standby power consumption and television with same |
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| Publication Number | Publication Date |
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| CN201533242U true CN201533242U (en) | 2010-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201323279U Expired - Fee Related CN201533242U (en) | 2009-06-01 | 2009-06-01 | Circuit capable of reducing standby power consumption and television with same |
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| CN (1) | CN201533242U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022161066A1 (en) * | 2021-01-26 | 2022-08-04 | 合肥美的电冰箱有限公司 | Xenon lamp power supply, purification device and refrigeration device |
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2009
- 2009-06-01 CN CN2009201323279U patent/CN201533242U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022161066A1 (en) * | 2021-01-26 | 2022-08-04 | 合肥美的电冰箱有限公司 | Xenon lamp power supply, purification device and refrigeration device |
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Granted publication date: 20100721 Termination date: 20130601 |