CN102902332A - Computer and power circuit thereof - Google Patents
Computer and power circuit thereof Download PDFInfo
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- CN102902332A CN102902332A CN2011102105466A CN201110210546A CN102902332A CN 102902332 A CN102902332 A CN 102902332A CN 2011102105466 A CN2011102105466 A CN 2011102105466A CN 201110210546 A CN201110210546 A CN 201110210546A CN 102902332 A CN102902332 A CN 102902332A
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Abstract
The invention belongs to the field of power circuit and provides a computer and a power circuit thereof. In the invention, a power control circuit which comprises a voltage isolating unit, a voltage acquiring and supplying unit, a switching tube and a voltage dividing unit is adopted in the power circuit of the computer. Under the condition that the main power source of the computer is in normal working, positive 5V output voltage is directly acquired from a 12V to 5V voltage transforming circuit to be taken as the standby voltage of the computer, so that the power loss of a standby auxiliary supply circuit is transferred to be the 12V to 5V voltage transforming circuit. Therefore, under the condition that the output power is unchanged, the total of voltage transformation input power of the whole computer power circuit is reduced, the voltage converting efficiency is improved, and the problems that the voltage transformation input power is high, the voltage converting efficiency is low and the power loss is serious in the existing computer power source are solved.
Description
Technical field
The invention belongs to the power circuit field, relate in particular to a kind of computing machine and power circuit thereof.
Background technology
At present, in computer power supply, generally adopt the standby auxiliary power supply circuit of inverse-excitation type architecture design, as the supply subject of computing machine+5V standby voltage, its circuit structure is simple, and is with low cost.
Yet, owing to adopted above-mentioned standby auxiliary power supply circuit to provide+the 5V standby voltage for computing machine in the computer power supply, thus the transformation power input in the existing computer power supply is increased, power conversion efficiency is low.Therefore, there is the problem that the transformation power input is large, voltage transitions efficient is low and power attenuation is serious in the active computer power supply.
Summary of the invention
The object of the present invention is to provide a kind of power circuit for computer, be intended to solve the active computer power supply and have the problem that the transformation power input is large, voltage transitions efficient is low and power attenuation is serious.
The present invention realizes like this; a kind of power circuit for computer; comprise ac rectifier, PFC (Power Factor Correction; power factor correction) booster circuit, PFC and pwm control circuit, PWM transforming circuit, current rectifying and wave filtering circuit, 12V turn the 3.3V transforming circuit, 12V turns 5V transforming circuit, route protection and sequential control circuit, standby auxiliary power supply circuit and power control circuit; it is characterized in that described power control circuit comprises:
The voltage isolated location, the 5V voltage output end of input termination described standby auxiliary power supply circuit, be used for isolation by described standby auxiliary power supply circuit output+5V voltage;
Voltage obtains and feed unit, and the described 12V of input termination turns the output terminal of 5V transforming circuit, and the output terminal of the described voltage isolated location of output termination is used for turning the 5V transforming circuit from described 12V and obtains+5V voltage, and described+5V voltage is exported as standby voltage;
Switching tube, the output terminal of input termination described current rectifying and wave filtering circuit, the described voltage of output termination obtains the control end with feed unit, is used for controlling described voltage and obtains duty with feed unit;
Partial pressure unit; the output terminal of the described current rectifying and wave filtering circuit of input termination; the control end of the described switching tube of dividing potential drop termination; PG (the Power Good of the control described route protection of termination and sequential control circuit; power supply is normal) signal output part; be used for the 12V voltage from described current rectifying and wave filtering circuit output is carried out dividing potential drop, control conducting and the cut-off of described switching tube.
Another object of the present invention is to provide a kind of computing machine that comprises described power circuit for computer.
In the present invention, comprise described voltage isolated location by in power circuit for computer, adopting, described voltage obtains and feed unit, the described power control circuit of described switching tube and described partial pressure unit, in computing machine primary power situation working properly, turn the 5V transforming circuit from described 12V directly to obtain+the 5V output voltage is as the standby voltage of computing machine, make the power attenuation of described standby auxiliary power supply circuit transfer to described 12V and turn the 5V transforming circuit, thereby guaranteed in the constant situation of output power, reduce the transformation power input summation of whole power circuit for computer, and voltage transitions efficient is improved, solve the active computer power supply and existed the transformation power input large, the problem that voltage transitions efficient is low and power attenuation is serious.
Description of drawings
Fig. 1 is the modular structure figure of the power circuit for computer that provides of the embodiment of the invention;
Fig. 2 is the exemplary circuit structural drawing of the power circuit for computer that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the modular structure of the power circuit for computer that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows:
In embodiments of the present invention; ac rectifier 200; PFC booster circuit 300; PWM transforming circuit 500 and current rectifying and wave filtering circuit 600 join end to end successively; the input end of PFC and pwm control circuit 400; the first output terminal and the second output terminal respectively with the control voltage output end of standby auxiliary power supply circuit 1000; the control end of the control end of PFC booster circuit 300 and PWM transforming circuit 500 connects; the output terminal of current rectifying and wave filtering circuit 600 turns the input end of 3.3V transforming circuit 700 simultaneously with 12V; input end and route protection that 12V turns 5V transforming circuit 800 are connected with the 12V voltage input end+12V of sequential control circuit 900, and route protection and the 3.3V voltage input end+3.3V of sequential control circuit 900 are connected 5V and are connected with output terminal that 12V turns 3.3V transforming circuit 700 is connected 5V transforming circuit 800 with 12V output terminal respectively with the 5V voltage input end.
Voltage isolated location 101, the 5V voltage output end of input end reception machine auxiliary power supply circuit 1000, be used for isolation by 1000 outputs of standby auxiliary power supply circuit+5V voltage;
Voltage obtains and feed unit 102, and input termination 12V turns the output terminal of 5V transforming circuit 800, and the output terminal of output termination voltage isolated location 101 be used for turning 5V transforming circuit 800 from 12V and obtain+5V voltage, and general+5V voltage is exported as standby voltage;
Switching tube 103, the output terminal of input termination current rectifying and wave filtering circuit 600, the output termination voltage obtains the control end with feed unit 102, is used for control voltage and obtains duty with feed unit 102;
Fig. 2 shows the exemplary circuit structure of the power circuit for computer that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows:
As one embodiment of the invention, voltage isolated location 101 is a diode D1, and the anode of diode D1 and negative electrode are respectively input end and the output terminal of voltage isolated location 101.
As one embodiment of the invention, voltage obtains with feed unit 102 and comprises resistance R 1 and metal-oxide-semiconductor Q1, resistance R 1 is connected between the grid and equipotential ground of metal-oxide-semiconductor Q1, and the source electrode of metal-oxide-semiconductor Q1 and drain electrode are respectively voltage and obtain input end and output terminal with feed unit 102.
As one embodiment of the invention, switching tube 103 is a triode Q2, and the base stage of triode Q2, emitter and collector are respectively control end, input end and the output terminal of switching tube 103.
As one embodiment of the invention, partial pressure unit 104 comprises resistance R 2, resistance R 3, triode Q3 and resistance R 4, the first end of resistance R 2 and the second end are respectively input end and minute pressure side of partial pressure unit 104, resistance R 3 is connected between the collector of the second end of resistance R 2 and triode Q3, the emitter of triode Q3 is connected the first end of being connected with resistance R with equipotential ground and is connected with base stage, the second end of resistance R 4 is the control end of partial pressure unit 104.
The principle of work of power control circuit 100 is:
Route protection and sequential control circuit 900 detect current rectifying and wave filtering circuit 600,12V turn Voltage-output that 3.3 V transforming circuit 700 and 12V turn 5V transforming circuit 800 all normal after; can be from its PG signal output part PG output 5V high level; this 5V high level provides bias voltage by resistance R 4 for the base stage of triode Q3; triode Q3 conducting this moment; the current potential of the collector of triode Q3 is dragged down; so the series connection dividing potential drop loop that is comprised of resistance R 1, resistance R 3 and triode Q3 makes triode Q2 conducting for triode Q2 provides an emitter-base bias voltage.Triode Q2 is in the situation of conducting, from its current collection very metal-oxide-semiconductor Q1 gate voltage is provided, metal-oxide-semiconductor Q1 conducting, so, 12V turns 5V transforming circuit 800 outputs+5V voltage and enters metal-oxide-semiconductor Q1 by the source electrode of metal-oxide-semiconductor Q1, subsequently metal-oxide-semiconductor Q1 from its drain electrode output+5V standby voltage (owing to metal-oxide-semiconductor Q1 impedance when the conducting is the milliohm level, so its to 12V turn 5V transforming circuit 800 output+loss of 5V voltage is similar to zero), the voltage difference at diode D1 two ends is less than its conduction voltage drop, diode D1 cut-off, and with standby auxiliary power supply circuit 1000 output+isolation of 5V voltage, thereby the drain electrode that guarantees metal-oxide-semiconductor Q1 exports+the 5V standby voltage entirely by 12V turn that 5V transforming circuit 800 exports+5V voltage supplies with, and reduced power attenuation.
The embodiment of the invention also provides a kind of computing machine that comprises above-mentioned power circuit for computer.
In embodiments of the present invention, comprise voltage isolated location 101 by in power circuit for computer, adopting, voltage obtains and feed unit 102, the power control circuit 100 of switching tube 103 and partial pressure unit 104, in computing machine primary power situation working properly, turn 5V transforming circuit 800 from 12V directly to obtain+the 5V output voltage is as the standby voltage of computing machine, make the power attenuation of standby auxiliary power supply circuit 1000 transfer to 12V and turn 5V transforming circuit 800, thereby guaranteed in the constant situation of output power, reduce the transformation power input summation of whole power circuit for computer, and voltage transitions efficient is improved, solve the active computer power supply and existed the transformation power input large, the problem that voltage transitions efficient is low and power attenuation is serious.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. power circuit for computer; comprise that ac rectifier, PFC booster circuit, PFC and pwm control circuit, PWM transforming circuit, current rectifying and wave filtering circuit, 12V turn the 3.3V transforming circuit, 12V turns 5V transforming circuit, route protection and sequential control circuit, standby auxiliary power supply circuit and power control circuit; it is characterized in that described power control circuit comprises:
The voltage isolated location, the 5V voltage output end of input termination described standby auxiliary power supply circuit, be used for isolation by described standby auxiliary power supply circuit output+5V voltage;
Voltage obtains and feed unit, and the described 12V of input termination turns the output terminal of 5V transforming circuit, and the output terminal of the described voltage isolated location of output termination is used for turning the 5V transforming circuit from described 12V and obtains+5V voltage, and described+5V voltage is exported as standby voltage;
Switching tube, the output terminal of input termination described current rectifying and wave filtering circuit, the described voltage of output termination obtains the control end with feed unit, is used for controlling described voltage and obtains duty with feed unit;
Partial pressure unit; the output terminal of the described current rectifying and wave filtering circuit of input termination; the control end of the described switching tube of dividing potential drop termination; the PG signal output part of the control described route protection of termination and sequential control circuit; be used for the 12V voltage from described current rectifying and wave filtering circuit output is carried out dividing potential drop, control conducting and the cut-off of described switching tube.
2. power circuit for computer as claimed in claim 1 is characterized in that, described voltage isolated location is a diode D1, and the anode of described diode D1 and negative electrode are respectively input end and the output terminal of described voltage isolated location.
3. power circuit for computer as claimed in claim 1, it is characterized in that, described voltage obtains with feed unit and comprises resistance R 1 and metal-oxide-semiconductor Q1, described resistance R 1 is connected between the grid and equipotential ground of described metal-oxide-semiconductor Q1, and the source electrode of described metal-oxide-semiconductor Q1 and drain electrode are respectively described voltage and obtain input end and output terminal with feed unit.
4. power circuit for computer as claimed in claim 1 is characterized in that, described switching tube is a triode Q2, and the base stage of described triode Q2, emitter and collector are respectively control end, input end and the output terminal of described switching tube.
5. power circuit for computer as claimed in claim 1, it is characterized in that, described partial pressure unit comprises resistance R 2, resistance R 3, triode Q3 and resistance R 4, the first end of described resistance R 2 and the second end are respectively input end and minute pressure side of described partial pressure unit, described resistance R 3 is connected between the collector of the second end of described resistance R 2 and described triode Q3, the emitter of described triode Q3 be connected with base stage with equipotential ground be connected the first end of resistance R 4 and be connected, the second end of described resistance R 4 is the control end of described partial pressure unit.
6. computing machine; it is characterized in that; described computing machine comprises power circuit for computer; described power circuit for computer comprises that ac rectifier, PFC booster circuit, PFC and pwm control circuit, PWM transforming circuit, current rectifying and wave filtering circuit, 12V turn the 3.3V transforming circuit, 12V turns 5V transforming circuit, route protection and sequential control circuit, standby auxiliary power supply circuit and power control circuit, and described power control circuit comprises:
The voltage isolated location, the 5V voltage output end of input termination described standby auxiliary power supply circuit, be used for isolation by described standby auxiliary power supply circuit output+5V voltage;
Voltage obtains and feed unit, and the described 12V of input termination turns the output terminal of 5V transforming circuit, and the output terminal of the described voltage isolated location of output termination is used for turning the 5V transforming circuit from described 12V and obtains+5V voltage, and described+5V voltage is exported as standby voltage;
Switching tube, the output terminal of input termination described current rectifying and wave filtering circuit, the described voltage of output termination obtains the control end with feed unit, is used for controlling described voltage and obtains duty with feed unit;
Partial pressure unit; the output terminal of the described current rectifying and wave filtering circuit of input termination; the control end of the described switching tube of dividing potential drop termination; the PG signal output part of the control described route protection of termination and sequential control circuit; be used for the 12V voltage from described current rectifying and wave filtering circuit output is carried out dividing potential drop, control conducting and the cut-off of described switching tube.
7. computing machine as claimed in claim 6 is characterized in that, described voltage isolated location is a diode D1, and the anode of described diode D1 and negative electrode are respectively input end and the output terminal of described voltage isolated location.
8. computing machine as claimed in claim 6, it is characterized in that, described voltage obtains with feed unit and comprises resistance R 1 and metal-oxide-semiconductor Q1, described resistance R 1 is connected between the grid and equipotential ground of described metal-oxide-semiconductor Q1, and the source electrode of described metal-oxide-semiconductor Q1 and drain electrode are respectively described voltage and obtain input end and output terminal with feed unit.
9. computing machine as claimed in claim 6 is characterized in that, described switching tube is a triode Q2, and the base stage of described triode Q2, emitter and collector are respectively control end, input end and the output terminal of described switching tube.
10. computing machine as claimed in claim 6, it is characterized in that, described partial pressure unit comprises resistance R 2, resistance R 3, triode Q3 and resistance R 4, the first end of described resistance R 2 and the second end are respectively input end and minute pressure side of described partial pressure unit, described resistance R 3 is connected between the collector of the second end of described resistance R 2 and described triode Q3, the emitter of described triode Q3 be connected with base stage with equipotential ground be connected the first end of resistance R 4 and be connected, the second end of described resistance R 4 is the control end of described partial pressure unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110210546.6A CN102902332B (en) | 2011-07-26 | 2011-07-26 | Computer and power circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110210546.6A CN102902332B (en) | 2011-07-26 | 2011-07-26 | Computer and power circuit thereof |
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| CN102902332A true CN102902332A (en) | 2013-01-30 |
| CN102902332B CN102902332B (en) | 2015-04-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1790203A (en) * | 2004-12-17 | 2006-06-21 | 鸿富锦精密工业（深圳）有限公司 | Power supply voltage generation circuit |
| US20090189579A1 (en) * | 2008-01-30 | 2009-07-30 | Melanson John L | Switch state controller with a sense current generated operating voltage |
| JP3153603U (en) * | 2009-05-15 | 2009-09-10 | 康舒科技股▲ふん▼有限公司 | Power supply device |
| CN102035366A (en) * | 2010-12-30 | 2011-04-27 | Bcd半导体制造有限公司 | Power supply device |
| CN202166958U (en) * | 2011-07-26 | 2012-03-14 | 中国长城计算机深圳股份有限公司 | Computer and power supply circuit thereof |
-
2011
- 2011-07-26 CN CN201110210546.6A patent/CN102902332B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1790203A (en) * | 2004-12-17 | 2006-06-21 | 鸿富锦精密工业（深圳）有限公司 | Power supply voltage generation circuit |
| US20090189579A1 (en) * | 2008-01-30 | 2009-07-30 | Melanson John L | Switch state controller with a sense current generated operating voltage |
| JP3153603U (en) * | 2009-05-15 | 2009-09-10 | 康舒科技股▲ふん▼有限公司 | Power supply device |
| CN102035366A (en) * | 2010-12-30 | 2011-04-27 | Bcd半导体制造有限公司 | Power supply device |
| CN202166958U (en) * | 2011-07-26 | 2012-03-14 | 中国长城计算机深圳股份有限公司 | Computer and power supply circuit thereof |
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| CN102902332B (en) | 2015-04-29 |
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Address after: 518057 computer building of the Great Wall, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee after: China the Great Wall science and technology group Limited by Share Ltd Address before: 518057 computer building of the Great Wall, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee before: China Changcheng Computer Shenzhen Co., Ltd. |