CN101426113A - Method and system for lowering standby power consumption of television set - Google Patents
Method and system for lowering standby power consumption of television set Download PDFInfo
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- CN101426113A CN101426113A CNA2007101242046A CN200710124204A CN101426113A CN 101426113 A CN101426113 A CN 101426113A CN A2007101242046 A CNA2007101242046 A CN A2007101242046A CN 200710124204 A CN200710124204 A CN 200710124204A CN 101426113 A CN101426113 A CN 101426113A
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- 230000005347 demagnetization Effects 0.000 claims description 31
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 12
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- 239000003990 capacitor Substances 0.000 description 17
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- 230000033228 biological regulation Effects 0.000 description 2
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- 238000004134 energy conservation Methods 0.000 description 2
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a method for reducing television standby power consumption, which is applied in TV standby mode. The method includes the steps of: reducing the switch transformer winding voltage; and disconnecting the degaussing circuit between a degaussing thermistor and the AC power. The present invention also discloses a system for reducing television standby power consumption, which includes: a primary circuit for reducing the switch transformer winding voltage in a TV standby mode; and a degaussing thermistor control circuit for disconnecting the degaussing circuit between a degaussing thermistor and the AC power in TV standby mode. The present invention can effectively reduce the TV standby power and meet the requirements that the TV standby power consumption is less than 1W.
Description
Technical field
The present invention relates to a kind of technical field of television sets, relate in particular to a kind of method and system that reduce standby power consumption of television set.
Background technology
Stand-by power consumption is meant the energy resource consumption of household appliances when shutting down or not exercising its original function.The effective energy consumption that in use produces with household appliances is different, and stand-by power consumption is a kind of energy waste basically.Add up according to internal authority mechanism: the family appliance standby power consumption accounts for 3%～13% of civilian power consumption in the world, account for 2% of gross generation, wherein the standby energy consumption of audio-visual products such as TV has accounted for 68.6% of total standby energy consumption, and the average stand-by power consumption of the existing television set of China is up to the 8.07W/ platform.
In order to save limited electric power resource, EACEM (European Association of ConsumerElectronics Manufacturers, Europe consumer electronics alliance) regulation, from January 1 calendar year 2001, enter the AUDIO PROD-UCTS (audio product) in Europe, stand-by power consumption must be lower than 5W, will be lower than 3W from January 1st, 2004, will be lower than 1W from January 1st, 2007.And China has also proposed regulation: from March 1st, 2006 stand-by power consumption will forbid selling greater than the television set of 9W, its energy-conservation evaluation of estimate is 3W; Stand-by power consumption will be forbidden selling greater than the television set of 3W in 2009, and energy-conservation evaluation of estimate is 1W.The power supply chip FSCQ1265RT of available technology adopting FAIRCHILD company is as the Switching Power Supply of television set, but the stand-by power consumption of its complete machine is about 3W, stand-by power consumption can't be less than the requirement of 1W, therefore designs the task of top priority that the energy-saving electric power effective scheme has become present television set industry.
In summary, existing reduction standby power consumption of television set technical scheme obviously exists inconvenience and defective, so be necessary to be improved on reality is used.
Summary of the invention
At above-mentioned defective, the present invention's first purpose is to provide a kind of method that reduces standby power consumption of television set, and this method can effectively reduce standby power consumption of television set, to satisfy the requirement of standby power consumption of television set less than 1W.
The system of the reduction standby power consumption of television set that the present invention's second purpose is to provide a kind of, this system can satisfy the requirement of standby power consumption of television set less than 1W.
In order to realize above-mentioned first purpose, the invention provides a kind of method that reduces standby power consumption of television set, be applied under the television set holding state, this method comprises following two steps in no particular order:
A, reduction switch transformer winding voltage;
Degaussing circuit between B, disconnection demagnetization thermistor and AC power.
The method according to this invention, described steps A further comprises:
The number of turn of A1, the elementary feedback winding of increase switch transformer;
The secondary feedback current of A2, raising photoelectrical coupler also feeds back to Switching Power Supply;
A3, Switching Power Supply reduce the switch transformer winding voltage according to the secondary feedback current of photoelectrical coupler.
The method according to this invention, in the described steps A 1, elementary feedback winding one end of switch transformer links to each other with one first voltage-stabiliser tube with the accessory power supply end of Switching Power Supply, and other end ground connection; And/or
In the described steps A 2, improve the secondary feedback current of optical coupler by the voltage stabilizing value of adjusting one second voltage-stabiliser tube.
The method according to this invention, the voltage stabilizing value with second voltage-stabiliser tube in the described steps A 2 is reduced to the secondary feedback current that 2.7V improves photoelectrical coupler; And/or described second voltage-stabiliser tube links to each other with photoelectrical coupler.
The method according to this invention disconnects degaussing circuit between demagnetization thermistor and AC power by demagnetization thermistor control circuit among the described step B.
The method according to this invention, described demagnetization thermistor control circuit comprises:
Relay is used at the degaussing circuit that disconnects under the television set holding state between demagnetization thermistor and AC power;
Control relay circuit is used to control the degaussing circuit between this relay disconnection demagnetization thermistor and AC power.
The method according to this invention, described Switching Power Supply are the FSCQ1265RT power supply.
In order to realize above-mentioned second purpose, the invention provides a kind of system that reduces standby power consumption of television set, comprising:
Primary circuit is used at television set holding state decline low switch Transformer Winding voltage;
Demagnetization thermistor control circuit is used at the degaussing circuit that disconnects under the television set holding state between demagnetization thermistor and AC power.
According to system of the present invention, described primary circuit comprises switch transformer, Switching Power Supply and first voltage-stabiliser tube;
Described switch transformer increases the number of turn of its elementary feedback winding under the television set holding state, and described elementary feedback winding one end links to each other other end ground connection with the accessory power supply end of Switching Power Supply with first voltage-stabiliser tube.
According to system of the present invention, this system further comprises:
Photoelectrical coupler, it links to each other with this primary circuit, is used to improve its secondary feedback current, and it is fed back to primary circuit with at television set holding state decline low switch Transformer Winding voltage; And/or described photoelectrical coupler is used to improve its secondary feedback current, and it is fed back to Switching Power Supply with at television set holding state decline low switch Transformer Winding voltage.
According to system of the present invention, this system further comprises:
Second voltage-stabiliser tube, it links to each other with this photoelectrical coupler, is used to adjust the voltage stabilizing value of this photoelectrical coupler to improve the secondary feedback current of photoelectrical coupler.
The present invention reduces the switch transformer winding voltage by primary circuit under the television set holding state, thereby the output voltage and the stand-by power consumption of television set have been reduced, and by the degaussing circuit between demagnetization thermistor control circuit disconnection demagnetization thermistor and AC power, eliminate the degaussing circuit loss, thereby eliminate the influence of degaussing circuit loss, and then reduce the stand-by power consumption of television set effectively the stand-by power consumption of television set.Compared with prior art, the present invention can satisfy the requirement of standby power consumption of television set less than 1W.
Description of drawings
Fig. 1 is the system framework figure of reduction standby power consumption of television set provided by the invention;
Fig. 2 a～2c is the system circuit diagram of reduction standby power consumption of television set provided by the invention;
Fig. 3 is the method flow diagram of reduction standby power consumption of television set provided by the invention;
Fig. 4 is the method flow diagram of the reduction standby power consumption of television set that provides in the preferred embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The system 100 of reduction standby power consumption of television set provided by the invention as shown in Figure 1, this system 100 comprises inlet wire anti-jamming circuit 101, primary circuit 102, power supply Opportunity awaiting control for linear and voltage stabilizing circuit 103, output circuit 104 and demagnetization thermistor control circuit 105, wherein:
Inlet wire anti-jamming circuit 101 is used for electrical network and Switching Power Supply N901 impulsive noise are carried out two-way isolation.Referring to Fig. 2 a, this inlet wire anti-jamming circuit 101 comprises: common mode filtering inductance L 900, filter capacitor C910.The positive pole of filter capacitor C910 links to each other the minus earth of filter capacitor C910 with common mode filter inductance L900.Common mode filtering inductance L 900 is used for the Harmonic Interference that spike causes of filtering filter capacitor C910 charging.
Among the present invention, described Switching Power Supply N901 is the FSCQ1265RT power supply, referring to Fig. 2 a, its the 1st pin is the drain D RAIN of inner switch mosfet pipe, the positive pole that absorbs capacitor C 920 with spike links to each other with inductance L 910, and described inductance L 910 links to each other with 15 pin of switch transformer T901, be used for Switching Power Supply N901 voltage is flowed to each winding of switch transformer T901, the 2nd pin of described Switching Power Supply N901 is earth terminal GND, the 3rd pin is the VCC end, be used for providing starting resistor and operating voltage to the inside of FSCQ1265RT power supply prime control circuit, itself and charging capacitor C908, the first voltage-stabiliser tube VD908 links to each other with dropping resistor R915RY, dropping resistor R915RY then links to each other with 18 pin of switch transformer T901 by dropping resistor R914RY, the 4th pin of Switching Power Supply N901 is feedback end FB, be used to receive the secondary feedback current of photoelectrical coupler, itself and voltage-stabiliser tube VD912, capacitor C 922, voltage-stabiliser tube VD913 and photoelectrical coupler N902 link to each other, the 5th pin of Switching Power Supply N901 is to hold SYNC synchronously, and it links to each other with voltage-stabiliser tube VD909 with resistance R 912.
When television set is under the open state, described primary circuit 102 courses of work are as follows: line voltage accesses to 18 pin of switch transformer T901 by common mode filtering inductance L 900 and filter capacitor C910, provides starting resistor by dropping resistor R914 and R915 to capacitor C 908 chargings and to the 3rd pin of Switching Power Supply N901 simultaneously.Behind the power initiation, the voltage of required 18 pin of the 13rd feel of switch transformer T901 winding and 15 pin, induced voltage is divided into two-way by V910 by resistance R 916, the VD910 of leading up to carries out rectification, after carrying out filtering by capacitor C 908 then, be delivered to the VCC end so that operating voltage to be provided, another road is carried out rectification by VD911 and is become unidirectional positive pulse, remove the spike of pulse front edge again by resistance R 913 and capacitor C 913 integrations, obtain at the R912 two ends through VD909 delivering to the SYNC end behind the flat part of pulse, thereby maintained switch power supply N901 obtains the voltage stabilizing state that continuous trigger enters pulse width control under open state, after Switching Power Supply N901 enters stable state, hold to switch transformer T901 winding output voltage by DRAIN, to guarantee the work of subsequent conditioning circuit.
Among the present invention, the 10th pin to the 18 pin of described switch transformer T901 are called the elementary winding of switch transformer T901, and wherein, the 11st pin to the 13 pin are called the elementary feedback winding of switch transformer T901.Under the television set holding state, the Switching Power Supply N901 of primary circuit 102 is in Burst (sudden change) pattern, reduces switch transformer T901 winding voltage, can reduce the output voltage of output circuit 104, thereby reduces standby power consumption of television set.
Under the holding state, the output voltage of output circuit 104 is low more, then switch transformer T901 winding voltage is then low more, and in order to guarantee the VCC terminal voltage of Switching Power Supply N901 operate as normal under the Burst pattern, the present invention increases the number of turn of the elementary feedback winding of switch transformer T901.According to circuit theory, increase the elementary feedback umber of turn of switch transformer T901, can increase the induced voltage of the 13rd pin, thereby guarantee the VCC terminal voltage of Switching Power Supply N901 operate as normal under the Burst pattern.And during open state, the output voltage of output circuit 104 is normal, this moment, switch transformer T901 winding voltage then kept normal, the induced voltage of the 13rd pin is compared with the induced voltage of prior art open state, obviously improved, this moment, induced voltage was by the first voltage-stabiliser tube VD908, under the pressure stabilization function of the first voltage-stabiliser tube VD908, keep normal voltage, be no more than specification requirement thereby make by the VCC terminal voltage.
Power supply Opportunity awaiting control for linear and voltage stabilizing circuit 103 link to each other with primary circuit 102 with output circuit 104, are used for when television set is in open state, stablize the operating voltage of primary circuit 102; And, be used to control and the Burst pattern of stable primary circuit 102 when television set is in holding state.
As Fig. 2 b, power supply Opportunity awaiting control for linear and voltage stabilizing circuit 103 comprise: photoelectrical coupler N902, the second voltage-stabiliser tube VD961 and sampling error amplifying circuit 1031.
Photoelectrical coupler N902 is made up of a light-emitting diode and a phototriode.The conducting of described phototriode is subjected to the control of lumination of light emitting diode power.When the light-emitting diode forward voltage raise, luminous enhancing made the triode conducting, and electric current increases, and internal resistance reduces; Otherwise luminescent decay when the light-emitting diode forward voltage descends reduces triode conducting electric current, and internal resistance increases.Input 1 pin of photoelectric coupled device, 2 pin and output 4 pin, 3 pin are independent separately, have only input independent mutually with the power supply circuits earth terminal of output, just can play the potential isolation effect.
The negative pole of the described second voltage-stabiliser tube VD961 links to each other with input 2 pin of photoelectrical coupler N902, and positive pole links to each other with the collector electrode of triode V954.In order to improve the secondary feedback current by the photoelectrical coupler of FB end, to reduce switch transformer T901 winding voltage and to reduce stand-by power consumption, the present invention adjusts the voltage stabilizing value of second voltage-stabiliser tube.Preferably, the voltage stabilizing value with second voltage-stabiliser tube is reduced to 2.7V.
Its operation principle is as follows: when television set is in holding state, triode V954 conducting, collector current is by arriving input 2 pin of photoelectrical coupler N902 behind the second voltage-stabiliser tube VD961, because the voltage stabilizing value of the second voltage-stabiliser tube VD961 reduces, the current potential of input 2 pin descends, lumination of light emitting diode intensity in the photoelectrical coupler N902 increases, make the phototriode electric current in the photoelectrical coupler N902 increase, thereby the internal resistance between output 4 pin, 3 pin reduces, and then improves the secondary feedback current by the photoelectrical coupler of FB end.After the secondary feedback current of the photoelectrical coupler by FB end improved, Switching Power Supply N901 was in the standby oscillatory regime, causes the reduction of T901 winding output voltage, thereby has reduced the output voltage of output circuit 104, and then has reduced standby power consumption of television set.
The sampling error amplifying circuit is made up of adjustable rheostat RP950, resistance R 972, resistance R 967, capacitor C 972 and error amplifier TL431.
Adjustable rheostat RP950 and resistance R 972 constitute sample circuit, be used for switch power supply secondary B+ output sampling, and it is sent into the control end R of error amplifier TL431.
The C end of described error amplifier TL431 links to each other with capacitor C 972 with the second voltage-stabiliser tube VD961, is used for regulated output voltage.The frequency characteristic that described resistance R 967 and capacitor C 972 are used for correction error amplifier TL431 prevents the unsteadiness of work.
Demagnetization thermistor control circuit 105 links to each other with inlet wire anti-jamming circuit 101, is used at the degaussing circuit that disconnects under the television set holding state between demagnetization thermistor and AC power.
Referring to Fig. 2 c, described demagnetization thermistor control circuit 105 comprises relay R Y901 and control relay circuit.
The described relay R Y901 one end (not shown) that links to each other with the demagnetization thermistor, the other end links to each other with control circuit, is used at the degaussing circuit that disconnects under the television set holding state between demagnetization thermistor and AC power.
Described control relay circuit 1051, comprise and relay R Y901 diode connected in parallel VD970, the resistance R 973RY that links to each other with diode VD970 negative pole, collector electrode and the anodal triode V955 that links to each other of diode VD970, the anodal charging capacitor C973 that links to each other with triode V955 base stage and hold the resistance R 970 that the C973 positive pole links to each other with charging is used for the break-make of control relay RY901.
Particularly, under the television set holding state, control relay circuit 1051 control RY901, make its open circuit, thereby the degaussing circuit between demagnetization thermistor and AC power is disconnected, eliminate the degaussing circuit loss, thereby eliminate the influence of degaussing circuit loss, and then reduce the stand-by power consumption of television set the stand-by power consumption of television set.
Fig. 3 is the method flow diagram of reduction standby power consumption of television set provided by the invention, and this method is applied under the television set holding state, comprises following two steps in no particular order:
Step S301, primary circuit 102 reduces the switch transformer winding voltage.
Step S302, demagnetization thermistor control circuit disconnects the degaussing circuit between demagnetization thermistor and AC power.
Though show first execution in step S301 among Fig. 3, execution in step S302 more in fact also can first execution in step S302, execution in step S301 again, i.e. this two steps and in no particular order.
In order better to describe the method for reduction standby power consumption of television set of the present invention, preferred embodiment provided by the invention is described in conjunction with the system of Fig. 1 as shown in Figure 4, and this embodiment specifically comprises as follows:
Step S401, the number of turn of the elementary feedback winding of increase switch transformer T901.
Can guarantee the VCC terminal voltage of Switching Power Supply N901 operate as normal under the Burst pattern by described step S401.
Step S402 is reduced to 2.7V to improve the secondary feedback current of photoelectrical coupler N902 with the voltage stabilizing value of the second voltage-stabiliser tube VD961.
Step S403 inputs to Switching Power Supply N901 with the secondary feedback current of photoelectrical coupler N902.
Step S404, Switching Power Supply N901 reduces switch transformer T901 winding voltage according to the secondary feedback current of photoelectrical coupler N902.
This step reduces the output voltage of output circuit 104 by reducing switch transformer T901 winding voltage, thereby can reduce stand-by power consumption.
Step S405, control relay circuit 1051 control relay RY901 disconnect relay R Y901.
Step S406, relay R Y901 disconnects the degaussing circuit between demagnetization thermistor and AC power.In this step, disconnect the degaussing circuit between demagnetization thermistor and AC power, can eliminate the loss of degaussing circuit, thereby eliminate the influence of degaussing circuit loss, further reduce the stand-by power consumption of television set the stand-by power consumption of television set.
In sum, the present invention reduces the switch transformer winding voltage by primary circuit under the television set holding state, thereby the output voltage and the stand-by power consumption of television set have been reduced, and by the degaussing circuit between demagnetization thermistor control circuit disconnection demagnetization thermistor and AC power, eliminate the degaussing circuit loss, thereby eliminate the influence of degaussing circuit loss, and then reduce the stand-by power consumption of television set the stand-by power consumption of television set.Compared with prior art, the present invention can satisfy the requirement of standby power consumption of television set less than 1W.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (11)
1, a kind of method that reduces standby power consumption of television set is applied to it is characterized in that under the television set holding state, and this method comprises following two steps in no particular order:
A, reduction switch transformer winding voltage;
Degaussing circuit between B, disconnection demagnetization thermistor and AC power.
2, method according to claim 1 is characterized in that, described steps A further comprises:
The number of turn of A1, the elementary feedback winding of increase switch transformer;
The secondary feedback current of A2, raising photoelectrical coupler also feeds back to Switching Power Supply;
A3, Switching Power Supply reduce the switch transformer winding voltage according to the secondary feedback current of photoelectrical coupler.
3, method according to claim 2 is characterized in that, in the described steps A 1, elementary feedback winding one end of switch transformer links to each other with one first voltage-stabiliser tube with the accessory power supply end of Switching Power Supply, and other end ground connection; And/or
In the described steps A 2, improve the secondary feedback current of optical coupler by the voltage stabilizing value of adjusting one second voltage-stabiliser tube.
4, method according to claim 3 is characterized in that, the voltage stabilizing value with second voltage-stabiliser tube in the described steps A 2 is reduced to the secondary feedback current that 2.7V improves photoelectrical coupler; And/or described second voltage-stabiliser tube links to each other with photoelectrical coupler.
5, method according to claim 1 is characterized in that, disconnects degaussing circuit between demagnetization thermistor and AC power by demagnetization thermistor control circuit among the described step B.
6, method according to claim 5 is characterized in that, described demagnetization thermistor control circuit comprises:
Relay is used at the degaussing circuit that disconnects under the television set holding state between demagnetization thermistor and AC power;
Control relay circuit is used to control the degaussing circuit between this relay disconnection demagnetization thermistor and AC power.
7, method according to claim 2 is characterized in that, described Switching Power Supply is the FSCQ1265RT power supply.
8, a kind of realization is characterized in that as the system of claim 1～7 method as described in each comprise: primary circuit is used at television set holding state decline low switch Transformer Winding voltage;
Demagnetization thermistor control circuit is used at the degaussing circuit that disconnects under the television set holding state between demagnetization thermistor and AC power.
9, system according to claim 8 is characterized in that, described primary circuit comprises switch transformer, Switching Power Supply and first voltage-stabiliser tube;
Described switch transformer increases the number of turn of its elementary feedback winding under the television set holding state, and described elementary feedback winding one end links to each other other end ground connection with the accessory power supply end of Switching Power Supply with first voltage-stabiliser tube.
10, system according to claim 9 is characterized in that, this system further comprises:
Photoelectrical coupler, it links to each other with this primary circuit, is used to improve its secondary feedback current, and it is fed back to primary circuit with at television set holding state decline low switch Transformer Winding voltage; And/or described photoelectrical coupler is used to improve its secondary feedback current, and it is fed back to Switching Power Supply with at television set holding state decline low switch Transformer Winding voltage.
11, system according to claim 10 is characterized in that, this system further comprises:
Second voltage-stabiliser tube, it links to each other with this photoelectrical coupler, is used to adjust the voltage stabilizing value of this photoelectrical coupler to improve the secondary feedback current of photoelectrical coupler.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101242046A CN101426113B (en) | 2007-10-29 | 2007-10-29 | Method and system for lowering standby power consumption of television set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101242046A CN101426113B (en) | 2007-10-29 | 2007-10-29 | Method and system for lowering standby power consumption of television set |
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| CN101426113A true CN101426113A (en) | 2009-05-06 |
| CN101426113B CN101426113B (en) | 2012-07-04 |
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| CN2007101242046A Active CN101426113B (en) | 2007-10-29 | 2007-10-29 | Method and system for lowering standby power consumption of television set |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843051A (en) * | 2012-08-24 | 2012-12-26 | 天津三星电子有限公司 | Power adapter |
| CN102916420A (en) * | 2012-11-09 | 2013-02-06 | 深圳市安科讯实业有限公司 | Circuit for preventing PWM chip from error protection |
| CN103280978A (en) * | 2013-06-28 | 2013-09-04 | 广州视源电子科技股份有限公司 | Low power consumption standby circuit based on feedback signals of load mainboard |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3883826B2 (en) * | 2001-07-18 | 2007-02-21 | ソニー株式会社 | Switching power supply |
| CN2569470Y (en) * | 2002-09-05 | 2003-08-27 | 青岛海信电器股份有限公司 | Automatic demagnetizing circuit for TV set |
| CN1269354C (en) * | 2003-11-01 | 2006-08-09 | 深圳创维－Rgb电子有限公司 | Device for demagnetizing clor TV set through automatic switchover and preventing overcurrent impulsion when turning on TV set |
| CN100367782C (en) * | 2004-03-26 | 2008-02-06 | 四川长虹电器股份有限公司 | Method and device for single tube reverse exciting power source for realizing low standby power loss |
-
2007
- 2007-10-29 CN CN2007101242046A patent/CN101426113B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843051A (en) * | 2012-08-24 | 2012-12-26 | 天津三星电子有限公司 | Power adapter |
| CN102916420A (en) * | 2012-11-09 | 2013-02-06 | 深圳市安科讯实业有限公司 | Circuit for preventing PWM chip from error protection |
| CN103280978A (en) * | 2013-06-28 | 2013-09-04 | 广州视源电子科技股份有限公司 | Low power consumption standby circuit based on feedback signals of load mainboard |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101426113B (en) | 2012-07-04 |
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