CN100595718C - stand-by circuit and stand-by method - Google Patents
stand-by circuit and stand-by method Download PDFInfo
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- CN100595718C CN100595718C CN200810214000A CN200810214000A CN100595718C CN 100595718 C CN100595718 C CN 100595718C CN 200810214000 A CN200810214000 A CN 200810214000A CN 200810214000 A CN200810214000 A CN 200810214000A CN 100595718 C CN100595718 C CN 100595718C
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 45
- 238000001914 filtration Methods 0.000 claims description 38
- 230000009466 transformation Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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Abstract
The invention relates to the field of the power electronics, and provides a standby circuit and the method for realizing the standby circuit. In the normal operating state, a first feedback loop works, the principal output voltage is normal, and devices work normally; when standby signals are present, the duty ratio of a pulse-width modulation (PWM) module is reduced through a high-voltage auxiliary winding module, so that the principle output voltage is reduced to close to zero and the electronic devices stop working, and at the same time, the high-voltage auxiliary winding module produces astandby voltage for the standby circuit, thereby entering the standby state, reducing the energy consumption and ensuring the simple circuit structure.
Description
Technical field
The present invention relates to the Power Electronic Circuit field, particularly a kind of stand-by circuit and idle method that is used to save electric power.
Background technology
Electronic equipment prolongs the life-span of electronic product for conservation of power at present, is provided with standby mode.Feed circuit as shown in Figure 1, comprise power supply unit, this power supply unit comprises that the output of input rectifying filtration module 11 inserts the input of switch converters module 12, the output of switch converters module 12 inserts the input of output rectification filtering module 13, first feedback module 14 and pulse width modulation module 15 series connection, this pulse width modulation module 15 inserts switch converters module 12, first feedback module 14 inserts output rectification filtering module 13, this exports rectification filtering module 13, first feedback module 14, pulse width modulation module 15, switch converters module 15 constitutes a backfeed loop, and this output rectification filtering module 13 is output as the principal voltage that electronic equipment (as: set-top box) provides electric power.When standby, by first feedback module, 14 output standby voltages, when standby, just close display device, this circuit continues as power electronic equipment, has wasted electric power.
Prior art provides a kind of technical scheme of standby to be: 1 the electronic metal oxide semiconductor field effect transistor of connecting on the output loop of the every road of power supply unit (metallic oxide semiconductor fieldeffect transistor:MOSFET), turn-off MOSFET during standby, thereby realize standby.And for example: adopt primary power and accessory power supply scheme, accessory power supply is turned off primary power during standby, and equipment is not worked, and only stays the stand-by circuit wake-up waiting.
But the inventor finds in practice: the scheme line construction complexity of the stand-by circuit of above-mentioned prior art, and the cost height, the space that takies circuit board is also very big, wastes more electric power.
Summary of the invention
The embodiment of the invention provides a kind of stand-by circuit simple in structure and idle method, to reduce the electronic equipment power consumption, reaches energy-conservation purpose.
In order to solve the problems of the technologies described above, the embodiment of the invention provides following technical scheme:
A kind of stand-by circuit, comprise power supply unit, described power supply unit comprises the input rectifying filtration module, the switch converters module, pulse width modulation module and output rectification filtering module, wherein the input rectifying filtration module is used for the voltage of input is carried out rectification and filtering, and be transported to the switch converters module, the switch converters module outputs to the output rectification filtering module with this voltage through voltage transformation, the output rectification filtering module is exported main output voltage after with the voltage commutation filtering that receives, this circuit also comprises the second backfeed loop unit, described power supply unit comprises that also high pressure assists the winding module, wherein:
Described high pressure is assisted the winding module, be connected between the second backfeed loop unit and the described switch converters module, be used under holding state, to the second backfeed loop unit output HIGH voltage reducing the duty cycle of switching of pulse width modulation module, and output standby voltage;
The second backfeed loop unit, be connected between auxiliary winding module of high pressure and the pulse width modulation module, be used under holding state, obtain the high voltage of the auxiliary winding module output of described high pressure, produce negative-feedback signal according to described high voltage, and send described negative-feedback signal to pulse width modulation module;
Described pulse width modulation module is used to receive the negative-feedback signal that the described second backfeed loop unit sends, and reduces duty cycle of switching according to described negative-feedback signal.
A kind of idle method comprises foregoing circuit, wherein:
The auxiliary winding module of high pressure under holding state, to the second backfeed loop unit output HIGH voltage to reduce the duty cycle of switching of pulse width modulation module;
The second backfeed loop unit receives the high voltage of the auxiliary winding module of high pressure under holding state, produce negative-feedback signal according to described high voltage, and described negative-feedback signal is sent to pulse width modulation module;
Pulse width modulation module receives described negative-feedback signal, reduces duty cycle of switching according to described negative-feedback signal.
The auxiliary winding module output of high pressure standby voltage.
As can be seen from the above technical solutions, reduce the duty cycle of switching of pulse width modulation module in the embodiment of the invention by the auxiliary winding module of high pressure, make main output voltage be reduced to zero, equipment is quit work; Simultaneously, the lower standby voltage of the auxiliary winding module output of high pressure, for the machine chip for the treatment of of electronic equipment provides voltage, wake-up waiting, line construction is simple, and has reduced energy consumption.
Description of drawings
The schematic diagram of a kind of feed circuit that Fig. 1 provides for prior art;
The schematic diagram of first kind of stand-by circuit that Fig. 2 provides for the embodiment of the invention;
The schematic diagram of second kind of stand-by circuit that Fig. 3 provides for the embodiment of the invention;
The process flow diagram of a kind of idle method that Fig. 4 provides for the embodiment of the invention.
Embodiment
As shown in Figure 2, the embodiment of the invention provides a kind of stand-by circuit, comprise power supply unit 100, power supply unit comprises input rectifying filtration module 101, switch converters module 102, pulse width modulation module 105 and output rectification filtering module 103, wherein 101 of input rectifying filtering moulds are used for the voltage of input is carried out rectification and filtering, and be transported to switch converters module 102, switch converters module 102 with this voltage transformation after with this voltage output to output rectification filtering module 103, output rectification filtering module 103 with the voltage commutation filtering that receives after the output main output voltage give electronic equipment, first isolation module is connected with output rectification filtering module 103, carry power supply to electronic equipment during the display device that is used to turn-off electronic equipment, this circuit also comprises the second backfeed loop unit 120, power supply unit 100 comprises that also high pressure assists winding module 107, wherein:
High pressure is assisted winding module 107, be connected between the second backfeed loop unit 120 and the switch converters module 102, be used under holding state, to the second backfeed loop unit, 120 output HIGH voltages reducing the duty cycle of switching of pulse width modulation module 105, and output standby voltage;
The second backfeed loop unit 120, be connected between auxiliary winding module 107 of high pressure and the pulse width modulation module 105, be used under holding state, obtain the high voltage of the auxiliary winding 107 modules output of high pressure, produce negative-feedback signal according to high voltage, and send described negative-feedback signal to pulse width modulation module 105;
Described pulse width modulation module 105 is used to receive the negative-feedback signal that the described second backfeed loop unit 120 sends, and reduces duty cycle of switching according to negative-feedback signal.
This embodiment makes main output voltage be reduced to zero by the duty cycle of switching of the auxiliary winding module 107 reduction pulse width modulation modules 105 of high pressure, and equipment is quit work; Simultaneously, the lower standby voltage of auxiliary winding module 107 outputs of high pressure, for the machine chip for the treatment of of electronic equipment provides voltage, wake-up waiting, line construction is simple, and has reduced energy consumption.
Describe the stand-by circuit that the embodiment of the invention provides in detail below in conjunction with Fig. 3, referring to Fig. 2, this stand-by circuit comprise the auxiliary winding module 107 of power supply unit 100, the second backfeed loop unit 120, high pressure, with export second isolation module 110 that rectification filtering module 103 is connected first isolation module 106 and is connected with triode switch module 108.
Wherein this power supply unit 100 comprises that the output of input rectifying filtration module 101 inserts the input of switch converters module 102, the output of switch converters module 102 inserts the input of output rectification filtering module 103, first feedback module 104 and pulse width modulation module 105 series connection, this pulse width modulation module 105 inserts switch converters module 102, first feedback module 104 inserts output rectification filtering module 103, this exports rectification filtering module 103, first feedback module 104, pulse width modulation module 105, switch converters module 102 constitutes a backfeed loop, and this output rectification filtering module 103 is output as the principal voltage that electronic equipment (as: set-top box) provides electric power.
The second backfeed loop unit 120 comprises: second feedback module 109, triode switch module 108, wherein: second feedback module 109 inserts pulse width modulation module 105.High pressure assists winding module 107, triode switch module 108 and second feedback module 109 to connect successively.The auxiliary winding 107 of high pressure inserts the output of switch converters 102.High pressure assists winding module 107, triode switch module 108 and second feedback module 109, pulse width modulation module 105 and switch converters module 102 to constitute a backfeed loop.
Electric main is through input rectifying filtration module 101 output high direct voltages, this dc high-voltage is transported on the switch converters module of being made up of transformer and switching tube 102, under the HF switch control of pulse width modulation module 105, this dc high-voltage becomes high-frequency pulse voltage, pass coupling step-downs output by switch converters module 102, again through output rectification filtering module 103 various main output voltages of output and the voltage that machine chip is required for the treatment of by 106 outputs of first isolation module.When power network fluctuation or load variations, control through first feedback module 104 and pulse width modulation module 105, adjust the dutycycle of switch transformer module 102, make the main output voltage of output and keep stable by the required voltage of machine chip for the treatment of that first isolation module 106 is exported.
When electronic equipment operate as normal (promptly not having standby signal), triode switch module 108 is ended, the auxiliary winding module 107 of high pressure does not participate in feedback, second feedback module 109 is not worked, 104 work of first feedback module, the duty cycle of switching of pulse width modulation module 105 is bigger, input rectifying filtration module 101 and switch transformer module 102 are in normal operating conditions, provide each road main output voltage by output rectification filtering module 103, and provide voltage for treating machine chip by first isolation module 106.
When standby signal is arranged, triode switch module 108 is by the standby signal triggering and conducting, the auxiliary winding module 107 of high pressure participates in control by second feedback module 109, first feedback module 104 is not worked simultaneously, make the duty cycle of switching of pulse width modulation module 105 become very little, output rectification filtering module 103 each road main output voltage are almost nil like this, but the auxiliary winding module 107 of high pressure is under the duty cycle of switching control of very little pulse width modulation module 105, still can obtain lower standby voltage, offer by the triode switch module 108 and second isolation module 110 and to treat machine chip, at this moment whole electric equipment is in holding state, reduced the power consumption of electronic equipment, and line construction is simple.
Accordingly, the embodiment of the invention also provides a kind of idle method, comprises the circuit that the foregoing description provides, and as shown in Figure 4, this idle method comprises foregoing circuit, comprises step:
The auxiliary winding module of A1, high pressure under holding state, to the second backfeed loop unit output HIGH voltage to reduce the duty cycle of switching of pulse width modulation module;
A2, the second backfeed loop unit receive the high voltage of the auxiliary winding module of high pressure under holding state, produce negative-feedback signal according to high voltage, and negative-feedback signal is sent to pulse width modulation module;
A3, pulse width modulation module receive negative-feedback signal, reduce duty cycle of switching according to negative-feedback signal.
A4, the auxiliary winding module output of high pressure standby voltage.
Wherein: under the situation that comprises the stand-by circuit that the foregoing description provides, above-mentioned steps A1, the auxiliary winding module of high pressure, specifically comprise to reduce the duty cycle of switching of pulse width modulation module to the second backfeed loop unit output HIGH voltage under holding state:
The triode switch module enters holding state according to the connection of the auxiliary winding module of standby signal control high pressure;
Second feedback module produces negative-feedback signal according to the voltage of the auxiliary winding module output of high pressure, and negative-feedback signal is sent to pulse width modulation module,
Pulse width modulation module reduces duty cycle of switching according to negative-feedback signal;
The second buffer circuit module receives the standby voltage of the auxiliary winding module output of high pressure.
More than a kind of stand-by circuit and idle method that the embodiment of the invention provided are described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, part in specific embodiments and applications all can change, in sum, the content of this instructions embodiment should not be construed as limitation of the present invention.
Claims (4)
1, a kind of stand-by circuit, comprise power supply unit, described power supply unit comprises the input rectifying filtration module, the switch converters module, pulse width modulation module and output rectification filtering module, wherein the input rectifying filtration module is used for the voltage of input is carried out rectification and filtering, and be transported to the switch converters module, the switch converters module outputs to the output rectification filtering module with described voltage through behind the voltage transformation, the output rectification filtering module is exported main output voltage after with the voltage commutation filtering that receives, it is characterized in that, this circuit also comprises the second backfeed loop unit, described power supply unit comprises that also high pressure assists the winding module, wherein:
Described high pressure is assisted the winding module, be connected between the second backfeed loop unit and the described switch converters module, be used under holding state, to the second backfeed loop unit output HIGH voltage reducing the duty cycle of switching of pulse width modulation module, and output standby voltage;
The second backfeed loop unit, be connected between auxiliary winding module of high pressure and the pulse width modulation module, be used under holding state, obtain the high voltage of the auxiliary winding module output of described high pressure, produce negative-feedback signal according to described high voltage, and send described negative-feedback signal to pulse width modulation module;
Described pulse width modulation module is used to receive the negative-feedback signal that the described second backfeed loop unit sends, and reduces duty cycle of switching according to described negative-feedback signal.
2, stand-by circuit according to claim 1 is characterized in that the described second backfeed loop unit comprises triode switch module, second feedback module and the second buffer circuit module, wherein:
Described triode switch module is connected with the auxiliary winding module of described high pressure, is used for according to standby signal the auxiliary winding module of high pressure being connected, and enters holding state;
Described second feedback module is in parallel with the described second buffer circuit module, and all insert described triode switch module, the output of described second feedback module inserts described pulse width modulation module, described second feedback module is used under described holding state, voltage according to the auxiliary winding module output of high pressure produces negative-feedback signal, and described negative-feedback signal is sent to pulse width modulation module;
The second buffer circuit module is used for reducing the standby voltage that the back receives the auxiliary winding module output of high pressure at the duty cycle of switching of pulse width modulation module, and exports described standby voltage.
3, a kind of method of standby comprises the described circuit of claim 1, it is characterized in that, wherein:
The auxiliary winding module of high pressure under holding state, to the second backfeed loop unit output HIGH voltage to reduce the duty cycle of switching of pulse width modulation module;
The second backfeed loop unit receives the high voltage of the auxiliary winding module of high pressure under holding state, produce negative-feedback signal according to described high voltage, and described negative-feedback signal is sent to pulse width modulation module;
Pulse width modulation module receives described negative-feedback signal, reduces duty cycle of switching according to described negative-feedback signal;
The auxiliary winding module output of high pressure standby voltage.
4, a kind of method of standby comprises the described stand-by circuit of claim 2, it is characterized in that:
The triode switch module enters holding state according to the connection of the auxiliary winding module of standby signal control high pressure;
Second feedback module produces negative-feedback signal according to the voltage of the auxiliary winding module output of high pressure, and described negative-feedback signal is sent to pulse width modulation module,
Pulse width modulation module reduces duty cycle of switching according to described negative-feedback signal;
The second buffer circuit module receives the standby voltage of the auxiliary winding module output of high pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810214000A CN100595718C (en) | 2008-08-22 | 2008-08-22 | stand-by circuit and stand-by method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810214000A CN100595718C (en) | 2008-08-22 | 2008-08-22 | stand-by circuit and stand-by method |
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| CN101373398A CN101373398A (en) | 2009-02-25 |
| CN100595718C true CN100595718C (en) | 2010-03-24 |
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| CN200810214000A Active CN100595718C (en) | 2008-08-22 | 2008-08-22 | stand-by circuit and stand-by method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148578B (en) * | 2010-02-10 | 2014-07-02 | 和硕联合科技股份有限公司 | Power device |
| CN101984658A (en) * | 2010-11-05 | 2011-03-09 | 华为终端有限公司 | Standby method of electrical appliance and electrical appliance |
| CN102594124B (en) * | 2012-02-28 | 2014-07-23 | 深圳麦格米特电气股份有限公司 | Switching power circuit |
| CN103309426A (en) * | 2012-03-12 | 2013-09-18 | 鸿富锦精密工业（深圳）有限公司 | Server |
| CN104980049B (en) * | 2014-04-01 | 2017-08-25 | 群光电能科技股份有限公司 | Electric power feedback device and electric power feedback method |
| CN106162339A (en) * | 2016-07-12 | 2016-11-23 | 乐视控股（北京）有限公司 | Stand-by circuit and electric terminal |
| JP6677891B2 (en) * | 2017-07-24 | 2020-04-08 | 富士通クライアントコンピューティング株式会社 | Information processing apparatus and voltage control method |
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- 2008-08-22 CN CN200810214000A patent/CN100595718C/en active Active
Non-Patent Citations (2)
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| 一个简单的低待机功耗的反激式电源方案. IR公司，Jonathan，Adams.世界电子元器件，第4期. 2002 |
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| CN101373398A (en) | 2009-02-25 |
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Address after: 518129 Building 2, B District, Bantian HUAWEI base, Longgang District, Shenzhen, Guangdong. Patentee after: Huawei terminal (Shenzhen) Co.,Ltd. Address before: 518129 Building 2, B District, Bantian HUAWEI base, Longgang District, Shenzhen, Guangdong. Patentee before: HUAWEI DEVICE Co.,Ltd. |
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Effective date of registration: 20181218 Address after: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee after: HUAWEI DEVICE Co.,Ltd. Address before: 518129 Building 2, B District, Bantian HUAWEI base, Longgang District, Shenzhen, Guangdong. Patentee before: Huawei terminal (Shenzhen) Co.,Ltd. |
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Effective date of registration: 20210425 Address after: Unit 3401, unit a, building 6, Shenye Zhongcheng, No. 8089, Hongli West Road, Donghai community, Xiangmihu street, Futian District, Shenzhen, Guangdong 518040 Patentee after: Honor Device Co.,Ltd. Address before: Metro Songshan Lake high tech Industrial Development Zone, Guangdong Province, Dongguan City Road 523808 No. 2 South Factory (1) project B2 -5 production workshop Patentee before: HUAWEI DEVICE Co.,Ltd. |