CN1790884A - Power supply device and its operating method - Google Patents
Power supply device and its operating method Download PDFInfo
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- CN1790884A CN1790884A CNA2004100985936A CN200410098593A CN1790884A CN 1790884 A CN1790884 A CN 1790884A CN A2004100985936 A CNA2004100985936 A CN A2004100985936A CN 200410098593 A CN200410098593 A CN 200410098593A CN 1790884 A CN1790884 A CN 1790884A
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- power supply
- supply device
- converter
- transducer
- auxiliary converter
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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
Abstract
The disclosed power supplier comprises: a primary converter contained a power factor corrector, a first capacitor parallel with said corrector and a dc-dc converter parallel with said capacitor; and an auxiliary converter parallel with the primary one. When the power supplier is on normal mode, both the said dc-dc converter and auxiliary converter supply a first output to output load; when on standby mode, turning down the dc-dc converter to use just the auxiliary converter for output while the said corrector holds the voltage for said capacitor to meet the request for output dynamic response of primary converter.
Description
Technical field
The present invention relates to a kind of power supply device and method of operation thereof, and particularly relevant for a kind of topological structure and method of operation thereof of switched-mode power supply feeding mechanism.
Background technology
When the design switched-mode power supply, require system to reach high conversion efficiency, high power density, high reliability, low cost and quick load dynamic response.Simultaneously, because energy conservation motion extensive implementation worldwide, so switched-mode power supply is also required to have low idling consumption.To this, countries such as International Energy Agency (IEA), US and European have made or have formulated relevant criterion, use the power loss of electric equipment products when standby of switched-mode power supply with restriction.
The standard that recommend in International Energy Agency and Europe is: for the following power supply of rated input power 75W, its no-load loss should be less than 0.75W after 1 day January in 2003.And for rated input power greater than the above power supply of 75W, temporarily also do not have ready-made standard.Believe As time goes on, will make strict more standard for large power supply.
When holding state, existing idling consumption reduction method has:
1, reduces the switch operating frequency of transducer during standby.Because the switching loss of (PCC) power is occupied bigger ratio in idling consumption, can reduce switching loss effectively so reduce switching frequency, and then reduce idling consumption.Yet, if adopt this method, audio-frequency noise can appear when switching frequency is reduced to 20KHz when following.So some producers add frequency jitter when this type of control chip of exploitation and the peak current limit technology weakens and the reduction noise.In addition, the method for this kind reduction switching frequency only limits the use of in pulse width modulation (PWM, pulse width modulation) transducer.
2, switch service intermittent.By control voltage error amplifying signal or direct control output voltage, can when standby, allow the transducer service intermittent, like this switch number of times in the unit interval and switching loss will thereby minimizing.Yet, adopt this kind method output voltage ripple when standby bigger, moreover also occur audio-frequency noise easily.The method can be applicable to pulse width modulation transducer and resonance converter.
3, adopt small power switch work.Because switching loss and drive loss are the relating to parameters such as parasitic capacitance with (PCC) power, and the parasitic capacitance of small power switch is less, so adopt the switching loss and the drive loss of small power switch work can the reduction to a certain extent transducer when standby.
Though above method can reduce idling consumption,, but be difficult to satisfy some strict idling consumption requirements for more powerful switched-mode power supply.For example Dell company is to the 1W requirement of 150W adapter, and promptly input power can not also will reach requirements such as high conversion efficiency, high power density, high reliability, low cost and quick load dynamic response simultaneously greater than 1W when power supply output 0.5W load.
Summary of the invention
The object of the present invention is to provide a kind of power supply device, provide power output jointly with the primary/secondary transducer topological structure of exporting in parallel.Normally loaded the time, most power are provided by main transducer, and this moment, auxiliary converter worked in limit power mode (being that power output always is not more than certain definite value).In standby, turn-off this DC-to-DC converter and make it not work, only provide power output to load by this auxiliary converter, simultaneously by power factor corrector and first electric capacity in order to keep the output dynamic response of this main transducer.Therefore, can reach the purpose of high conversion efficiency and low standby consume simultaneously.
A further object of the present invention provides a kind of method of operation of power supply device, when this power supply device works in standby mode, turn-offing main transducer makes it not work, only provide and export to load by auxiliary converter, simultaneously by power factor corrector and first electric capacity in order to keep the output dynamic response of this main transducer.
The present invention proposes a kind of power supply device, comprises main transducer (main converter) and auxiliary converter (auxiliary converter).Main transducer comprises power factor corrector (PFC, power factor corrector), first electric capacity in parallel with power factor corrector and a DC-to-DC converter (DC/DC converter) in parallel with this first electric capacity.Auxiliary converter is parallel to main transducer.Wherein, when power supply device worked in normal mode of operation, the DC-to-DC converter of main transducer and auxiliary converter provided first to export to output loading jointly; And when power supply device works in standby mode, turn-offing DC-to-DC converter makes it not work, only provide second to export to output loading by auxiliary converter, simultaneously power factor corrector is still worked keeping the voltage of first electric capacity, with the requirement of the output dynamic response that satisfies main transducer.
According to the described power supply device of preferred embodiment of the present invention, also comprise the rectifier and second electric capacity.Rectifier is coupled to the input of main transducer and auxiliary converter.Second electric capacity is parallel to the output of main transducer and auxiliary converter.
According to the described power supply device of preferred embodiment of the present invention, above-mentioned main transducer also comprises first optical coupler and first controller.First optical coupler is connected with output loading, in order to the operating state of detecting power supply device, and exports first control signal according to this.First controller is connected with first optical coupler, in order to receive first control signal and to export second control signal with the control DC-to-DC converter.
According to the described power supply device of preferred embodiment of the present invention, above-mentioned auxiliary converter also comprises second optical coupler and second controller.Second optical coupler is connected with output loading, in order to the operating state of detecting power supply device, and exports the 3rd control signal according to this.Second controller is connected with second optical coupler, in order to receive and according to the 3rd control signal with the control auxiliary converter.
According to the described power supply device of preferred embodiment of the present invention, above-mentioned DC-to-DC converter and auxiliary converter are pulse width modulation (PWM, pulse width modulation) transducer.For example, DC-to-DC converter can be asymmetrical half-bridge transducer (asymmetrical halfbridge converter), power factor corrector can be booster type (Boost) structure, and auxiliary converter can be flying back type transducer (Flyback converter).
The present invention proposes a kind of method of operation of power supply device in addition, comprises that step is as follows.At first detect the mode of operation of power supply device.When power supply device worked in normal mode of operation, DC-to-DC converter and the auxiliary converter of controlling main transducer provided first to export to output loading jointly.And, when power supply device works in standby mode, turn-off main transducer and make it not work, only provide second to export to output loading by auxiliary converter, keep the output dynamic response of main transducer simultaneously by the power factor corrector and first electric capacity.
The present invention is because of adopting the primary/secondary transducer topological structure of exporting in parallel so that power output to be provided jointly, therefore normally loaded the time, overwhelming majority power is provided by main transducer, and this moment, auxiliary converter worked in limit power mode (being that power output always is not more than certain fixed value).In standby, the power of output is provided by auxiliary converter entirely, and this moment, main transducer was not worked.Therefore, can reach the purpose of high conversion efficiency and low standby consume simultaneously.Because there is the electric capacity parallel connection to be disposed between power factor corrector and the DC-to-DC converter, therefore, when standby mode, can keep the voltage of first electric capacity, in addition to satisfy the output dynamic response of main transducer by power factor corrector.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the main and auxiliary transducer topological structure of a kind of output-parallel that illustrates according to preferred embodiment of the present invention.
Fig. 2 is a kind of detailed circuit diagram with the main and auxiliary transducer topological structure of output-parallel that illustrates according to preferred embodiment of the present invention.
Fig. 3 is a kind of power output chart according to different output loadings that preferred embodiment of the present invention is illustrated in.
Fig. 4 is the no-load loss parallel tables.
Fig. 5 is the input power parallel tables under the condition of 0.5W output loading.
Efficient parallel tables under different output loadings when Fig. 6 is the 90V input voltage.
Fig. 7 is the efficient parallel tables under the different input voltages of full load.
Symbol description
110,210: main transducer (main converter)
111,211: power factor corrector (PFC, power factor corrector)
112,212: DC-to-DC converter (DC/DC converter)
120,220: auxiliary converter (auxiliary converter)
130,230: rectifier
C
B, Co: electric capacity
Pin: input power
Po: power output
Po1: the power output of main transducer
Po2: the power output of auxiliary converter
Embodiment
Fig. 1 is the main and auxiliary transducer topological structure of a kind of output-parallel that illustrates according to preferred embodiment of the present invention.Please refer to Fig. 1, main transducer (main converter) 110 and auxiliary converter (auxiliary converter) 120 are in parallel at A1, A2 and B1, B2 place.After input power Pin that A1, A2 receive is by rectifier 130 rectifications, offer main transducer 110 and auxiliary converter 120.A1, A2 represent the input of switched-mode power supply, and it for example is connected to AC power.B1, B2 represent be the lead-out terminal of switched-mode power supply so that power output Po to be provided, wherein B1, B2 are connected to output loading usually.
Switched-mode power supply is the requirement of satisfying high conversion efficiency and high power density, and when the main transducer of design, its efficient optimization point is near full-load power, and therefore the efficient of master's transducer is relatively low when underloading.If the output loading during standby is provided by main transducer, then consume relatively large.And the power output of auxiliary converter is little, so in when design, the efficient of auxiliary converter when standby obtains optimization easily, thereby the consume during standby is corresponding less.
Main transducer 110 can be single-stage or multilevel hierarchy, in order to main power output to be provided at full load.Auxiliary converter 120 not only provides a spot of output loading (its peak power output limits), but also the power controlling of system will be provided.When at standby mode, main transducer 110 does not have power output, and all power outputs are provided by auxiliary converter 120.When normal mode of operation, main transducer 110 provides power output (peak power output of auxiliary converter 120 limits) jointly with auxiliary converter 120.
Main transducer 110 is to be two-layer configuration in the present embodiment, promptly by power factor corrector (PFC, power factor corrector) 111 and 112 compositions of DC-to-DC converter (DC/DC converter).First capacitor C in parallel between power factor corrector 111 and the DC-to-DC converter 112 with energy storage pressure stabilization function
B, and the output group of DC-to-DC converter 112 one second capacitor C also in parallel
O
When this power supply device was operated in normal mode of operation, DC-to-DC converter and the auxiliary converter of controlling main transducer provided first power output to output loading jointly.When standby mode, turn-off DC-to-DC converter 112 and make it not work (loss when reducing standby), only provide second power output to this output loading by auxiliary converter 120.At this moment, power factor corrector 111 is still worked, to keep first capacitor C
BOn voltage stable, and make system can satisfy the demand of output loading dynamic response.Replying normal mode of operation at the beginning, first capacitor C
BRequired burning voltage when DC-to-DC converter 112 power transfer are provided.
Above-mentioned auxiliary converter 120, power factor corrector 111 and DC-to-DC converter 112 can be implemented with reference to Fig. 2.Fig. 2 is the detailed circuit diagram of the main and auxiliary transducer topological structure of a kind of parallel connection that illustrates according to preferred embodiment of the present invention.Auxiliary converter 220 for example adopts the topological structure of flying back type transducer (Flyback converter).In present embodiment, also comprise second optical coupler and second controller in the auxiliary converter 220.Second optical coupler is connected with this output loading, in order to the operating state (for example detecting the output loading state of power output Po) of detecting this power supply device, and exports the 3rd control signal according to this.Second controller is connected with second optical coupler, in order to receive also according to the power output Po2 of the 3rd control signal with control auxiliary converter 220.
Fig. 3 is a kind of power output chart according to different output loadings that preferred embodiment of the present invention is illustrated in.Please refer to Fig. 3, wherein transverse axis is represented the gross output Po of power supply device, and the longitudinal axis is represented the power output Po1 of main transducer and the power output Po2 of auxiliary converter.Power output Po1 and Po2 sum equal power output Po.As power output Po during between 0～Pa (stand-by operation state), main transducer is output not, i.e. Po1=0, Po2=Po.As power output Po during between Pa～Pb (underloading operating state), main transducer begins that output is arranged, i.e. Po=Po1+Po2.As power output Po during greater than Pb (normal operating conditions), main transducer and auxiliary converter are exported jointly, and wherein auxiliary converter is operated in limit power output state, i.e. Po2=Po2max.
Below be with 150W, on the basis of 12V/12.5A o adapter, adopt the resulting result of the test of the foregoing description.Fig. 4 is the no-load loss parallel tables.Please refer to Fig. 4, wherein the longitudinal axis is represented input power, and transverse axis is represented input voltage.The A line is for adopting known techniques in 150W among the figure, and in the zero load consume of different input voltages, the B line then is according to embodiments of the invention zero load consume at different input voltages under identical output condition under the 12V/12.5A o adapter.No-load loss 0.105～the 0.343W of B line than A line reduction system can be obviously known in both comparisons, and be especially more obvious in low input section effect.
Fig. 5 is the input power parallel tables under the condition of 0.5W output loading.Please refer to Fig. 5, the A line is for adopting known technology at 150W among the figure, 12V/12.5A the input power during the 0.5W output loading of o adapter under different input voltages, B line then are according to the input power of embodiments of the invention when the 0.5W output loading of identical output condition under different input voltages.Both comparisons can know obviously that the B line also can reduce the input power 0.257～0.533W of system when the 0.5W output loading than A line, especially also adds obviously in low input section effect.At input voltage is 90V～150V, and idling consumption is less than 1W.
Efficient parallel tables under different output loadings when Fig. 6 is the 90V input voltage.Please refer to Fig. 6, wherein the longitudinal axis is represented efficient, and transverse axis is represented output loading.The A line is for adopting known technology in 150W among the figure, the efficient of 12V/12.5A o adapter when different output loading, and the B line then is in the efficient during in different output loading under the same terms according to embodiments of the invention.The A line overlaps with the B line is approximate among the figure, illustrates that the present invention does not influence the efficient of system.
Fig. 7 is the efficient parallel tables under the different input voltages of full load.Please refer to Fig. 7, wherein the longitudinal axis is represented efficient, and transverse axis is represented input voltage.The A line is for adopting known technology in 150W among the figure, the full load efficiency of 12V/12.5A o adapter when different input voltage, and the B line then is in the full load efficiency during at different input voltage under the same terms according to embodiments of the invention.The A line overlaps with the B line is approximate among the figure, illustrates that the present invention does not influence the efficient of system.
Though the present invention with preferred embodiment openly as above; right its is not in order to limiting the present invention, anyly has the knack of this operator, without departing from the spirit and scope of the present invention; when can doing a little also moving and retouching, so protection scope of the present invention is when according to being as the criterion of being defined in the claim.
Claims (18)
1. power supply device is characterized in that: comprising:
One main transducer comprises a power factor corrector, one first electric capacity in parallel with this power factor corrector and a DC-to-DC converter in parallel with this first electric capacity; And
One auxiliary converter is parallel to main transducer;
Wherein, when power supply device worked in normal mode of operation, the DC-to-DC converter of this main transducer and this auxiliary converter provided first to export to output loading jointly; And
When power supply device works in a standby mode, turn-offing this DC-to-DC converter makes it not work, only provide one second to export to this output loading by this auxiliary converter, simultaneously power factor corrector is still worked keeping the voltage of first electric capacity, with the requirement of the output dynamic response that satisfies main transducer.
2. power supply device as claimed in claim 1 is characterized in that: also comprise a rectifier, this rectifier is coupled to the input of main transducer and auxiliary converter.
3. power supply device as claimed in claim 1 is characterized in that: also comprise one second electric capacity, be parallel to the output of main transducer and auxiliary converter.
4. power supply device as claimed in claim 1 is characterized in that: this main transducer also comprises:
One first optical coupler is connected with output loading, in order to detecting the operating state of this power supply device, and exports one first control signal according to this; And
One first controller is connected with first optical coupler, in order to receive first control signal and to export one second control signal with the control DC-to-DC converter.
5. power supply device as claimed in claim 1, it is characterized in that: auxiliary converter also comprises:
One second optical coupler is connected with output loading, in order to detecting the operating state of this power supply device, and exports one the 3rd control signal according to this; And
One second controller is connected with second optical coupler, in order to receive and according to the 3rd control signal with the control auxiliary converter.
6. power supply device as claimed in claim 1 is characterized in that: DC-to-DC converter and auxiliary converter are the pulse width modulation transducer.
7. power supply device as claimed in claim 1 is characterized in that: DC-to-DC converter is the asymmetrical half-bridge transducer.
8. power supply device as claimed in claim 1 is characterized in that: this power factor corrector is to be the boosting type converter structure.
9. power supply device as claimed in claim 1 is characterized in that: this auxiliary converter is to be the flying back type transducer.
10. the method for operation of a power supply device, it is characterized in that: power supply device comprises a main transducer and one and the auxiliary converter that is in parallel of this main transducer, wherein main transducer comprises a power factor corrector, one first electric capacity and with first an electric capacity in parallel DC-to-DC converter in parallel with power factor corrector, and the method for operation of this power supply device comprises:
Detect the mode of operation of this power supply device;
When this power supply device worked in a normal mode of operation, this DC-to-DC converter and this auxiliary converter of controlling this main transducer provided one first to export to an output loading jointly; And
When this power supply device works in a standby mode, turn-offing this main transducer makes it not work, only provide one second to export to this output loading by this auxiliary converter, simultaneously power factor corrector is still worked keeping the voltage of first electric capacity, with the requirement of the output dynamic response that satisfies main transducer.
11. as the method for operation of power supply device as described in the claim 10, it is characterized in that: also comprise a rectifier is provided, this rectifier is coupled to the input of this main transducer and this auxiliary converter.
12. the method for operation as power supply device as described in the claim 10 is characterized in that: also comprise one second electric capacity is provided, be parallel to the output of this main transducer and this auxiliary converter.
13. as the method for operation of power supply device as described in the claim 10, it is characterized in that: this main transducer also comprises:
One first optical coupler is connected with this output loading, in order to the operating state of detecting power supply device, and exports one first control signal according to this; And
One first controller is connected with this first optical coupler, in order to receive this first control signal and to export one second control signal to control this DC-to-DC converter.
14. as the method for operation of power supply device as described in the claim 10, it is characterized in that: this auxiliary converter also comprises:
One second optical coupler is connected with this output loading, in order to detecting the operating state of this power supply device, and exports one the 3rd control signal according to this;
One second controller is connected with second optical coupler, in order to receive and according to the 3rd control signal to control this auxiliary converter.
15. as the method for operation of power supply device as described in the claim 10, it is characterized in that: this DC-to-DC converter and this auxiliary converter are the pulse width modulation transducer.
16. as the method for operation of power supply device as described in the claim 10, it is characterized in that: this DC-to-DC converter is to be the asymmetrical half-bridge transducer.
17. as the method for operation of power supply device as described in the claim 10, it is characterized in that: this power factor corrector is to be the boosting type converter structure.
18. as the method for operation of power supply device as described in the claim 10, it is characterized in that: this auxiliary converter is to be the flying back type transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100985936A CN100423423C (en) | 2004-12-14 | 2004-12-14 | Power supply device and its operating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100985936A CN100423423C (en) | 2004-12-14 | 2004-12-14 | Power supply device and its operating method |
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| Publication Number | Publication Date |
|---|---|
| CN1790884A true CN1790884A (en) | 2006-06-21 |
| CN100423423C CN100423423C (en) | 2008-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100985936A Active CN100423423C (en) | 2004-12-14 | 2004-12-14 | Power supply device and its operating method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222176B (en) * | 2008-01-10 | 2010-06-23 | 晨星半导体股份有限公司 | Direct-current power supply converting circuit and mode switching method |
| CN102044958A (en) * | 2009-10-23 | 2011-05-04 | 台达电子工业股份有限公司 | Voltage reducing and boosting PFC (Power Factor Correction) circuit system with auxiliary circuit and method thereof |
| US8736238B2 (en) | 2009-10-21 | 2014-05-27 | Delta Electronics, Inc. | Buck and buck/boost converter systems having auxiliary circuits and method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125530C (en) * | 1999-05-07 | 2003-10-22 | 天网电子股份有限公司 | Power factor modifying circuit |
| US7334141B2 (en) * | 2003-04-23 | 2008-02-19 | Dell Products L.P. | Method of saving energy in an information handling system by controlling a main converter based on the amount of power drawn by the system |
-
2004
- 2004-12-14 CN CNB2004100985936A patent/CN100423423C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222176B (en) * | 2008-01-10 | 2010-06-23 | 晨星半导体股份有限公司 | Direct-current power supply converting circuit and mode switching method |
| US8736238B2 (en) | 2009-10-21 | 2014-05-27 | Delta Electronics, Inc. | Buck and buck/boost converter systems having auxiliary circuits and method thereof |
| CN102044958A (en) * | 2009-10-23 | 2011-05-04 | 台达电子工业股份有限公司 | Voltage reducing and boosting PFC (Power Factor Correction) circuit system with auxiliary circuit and method thereof |
| CN102044958B (en) * | 2009-10-23 | 2014-01-01 | 台达电子工业股份有限公司 | Voltage reducing and boosting PFC (Power Factor Correction) circuit system with auxiliary circuit and method thereof |
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| Publication number | Publication date |
|---|---|
| CN100423423C (en) | 2008-10-01 |
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