CN108319355A - A kind of Buck framework power supply circuits improving power supply light-load efficiency - Google Patents
A kind of Buck framework power supply circuits improving power supply light-load efficiency Download PDFInfo
- Publication number
- CN108319355A CN108319355A CN201810078378.1A CN201810078378A CN108319355A CN 108319355 A CN108319355 A CN 108319355A CN 201810078378 A CN201810078378 A CN 201810078378A CN 108319355 A CN108319355 A CN 108319355A
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- China
- Prior art keywords
- inductance
- power supply
- load
- uin
- switching tube
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- 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 present invention provides a kind of Buck framework power supply circuits improving power supply light-load efficiency, belongs to server power supply technique field.To solve the problems, such as that existing Buck frameworks power supply circuit power consumption is big, inductance is based on after current saturation the characteristics of inductance value rapid decrease, this power supply circuit includes power supply Uin, switching tube Q, diode D, inductance L1, inductance L2, capacitance C, load RL；The Q drain electrodes of power supply Uin anode connecting valve pipes；Switching tube Q source electrodes connect diode D cathodes, and diode D model machines connect power supply Uin cathode；Switching tube Q source electrodes are also sequentially connected in series inductance L1 and inductance L2；Capacitance C connects the current output terminal of inductance L2 with one end after load RL parallel connections, and the other end connects power supply Uin cathode.The power supply circuit of the present invention can be improved CPU power supply nearly 2 points of VR efficiency, big advantage is all brought to the power consumption performance and cost of server by the inductance L1 for low saturation current of connecting in the front ends inductance L2 in the case where not influencing the application of CPU turbine technologies.
Description
Technical field
The present invention relates to server power supply technique field, specifically a kind of Buck frameworks improving power supply light-load efficiency
Power supply circuit.
Background technology
With the application of server CPU turbine technologies, the transient power of CPU is increasing, this allows for CPU power supplies
VR designs need meet the needs of prodigious electric current.By taking the CPU of newest Purley platforms as an example, TDC electric currents are 89A,
Max electric currents are 205A.Thus we when VR is designed, current value must satisfy the requirement of MAX electric currents.In order to meet the big electricity of CPU
The demand of stream and electric current fast dynamic response, the sensibility reciprocal of inductance must just design special small.In present applications ' the tail must be taken, respectively
Mainstay scheme inductance mainly uses the inductance of 120NH.
In the Power Management Design of Buck frameworks, one of significant properties of inductance is that inductance is smaller, and electric current dynamic response is better,
But efficiency is poorer.Conversely, inductance is bigger, the dynamic response of electric current is poorer, and efficiency is better.In the application of data center, although
The turbine technology of CPU is essential, but the time of its 80% or more work is all 30% or less be operated in MAX electric currents, it is evident that
At this time the sensibility reciprocal of inductance has been unsatisfactory for considering for the optimal value of power conversion efficiency, thus can bring the increasing of server energy consumption
Add.And server is this high-power, the equipment uninterruptedly used, and it is especially sensitive to system power dissipation, in big server demands quotient
Bid in, server energy consumption often increases 1W, and bid price will reduce by 100 yuan or more, and cost is heavy.
In the Buck framework power supply circuits design of existing server VR, CPU turbine technologies are to high current in order to balance,
The application of fast dynamic response, what the inductance that CPU VR power was chosen is the inductance of 120NH, to meet high current and quickly dynamic
The demand of variation.The inductance value of refer to the attached drawing 1, L is 120NH, and the maximum flow valuve of iL is 205A, in normal operation, iL
Current value generally in 60A hereinafter, when CPU is after starting turbocharging, in iL very short times from the even lower electric currents of 60A
The 205A risen, to meet the fast lifting of performance.But during it is worked normally, the practical time for triggering turbocharging technology is very short,
Less than the 20% of normal work.
Invention content
The technical assignment of the present invention is to solve the deficiencies in the prior art, provides a kind of Buck framves improving power supply light-load efficiency
Structure power supply circuit.
The technical scheme is that realize in the following manner：
A kind of Buck framework power supply circuits improving power supply light-load efficiency, power supply circuit includes power supply Uin, switching tube Q, diode
D, inductance L1, inductance L2, capacitance C, load RL；The Q drain electrodes of power supply Uin anode connecting valve pipes；Switching tube Q source electrodes connect diode
D cathodes, diode D model machines connect power supply Uin cathode；Switching tube Q source electrodes are also sequentially connected in series inductance L1 and inductance L2；Inductance L1's
Saturation current is less than the saturation current of inductance L2；Capacitance C connects the current output terminal of inductance L2 with one end after load RL parallel connections, separately
One end connects power supply Uin cathode.
Involved inductance L1 and inductance L2 series connection post packages are a variable inductance, and one end series connection of the variable inductance is opened
Close pipe Q drain electrodes, other end shunt capacitance C and load RL.
Involved switching tube Q preferentially selects metal-oxide-semiconductor.
The inductance value of involved inductance L2 is 100NH, and the saturation current of inductance L2 is 205A；The inductance of involved inductance L1
Amount is 220NH, and the saturation current of inductance L1 is 35 A -45A.
The input value of involved power supply Uin is 12V, output valve 1.8V, and the switching frequency of involved switching tube Q is
600K。
The present invention also provides a kind of Buck framework method of supplying power to improving power supply light-load efficiency, method of supplying power to is based on inductance in electric current
After saturation the characteristics of inductance value rapid decrease, the inductance L1 for low saturation current of connecting in the front ends inductance L2 of power supply circuit, and will
Inductance L1 and inductance L2 is encapsulated as a variable inductance, and the switching tube Q drain electrodes of one end series-fed circuit of the variable inductance,
The capacitance C and load RL of other end parallel operation circuit.
Involved power supply circuit includes power supply Uin, switching tube Q, diode D, inductance L1, inductance L2, capacitance C, load RL；
The Q drain electrodes of power supply Uin anode connecting valve pipes；Switching tube Q source electrodes connect diode D cathodes, and diode D model machines connect power supply Uin
Cathode；Switching tube Q source electrodes are also sequentially connected in series inductance L1 and inductance L2；Capacitance C connects inductance L2's with one end after load RL parallel connections
Current output terminal, the other end connect power supply Uin cathode.
Involved switching tube Q selects metal-oxide-semiconductor.
The inductance value of involved inductance L2 is 100NH, and the saturation current of inductance L2 is 205A；The inductance of involved inductance L1
Amount is 220NH, and the saturation current of inductance L1 is 35 A -45A.
The input value of involved power supply Uin is 12V, output valve 1.8V, and the switching frequency of involved switching tube Q is
600K。
A kind of Buck frameworks power supply circuit of raising power supply light-load efficiency of the present invention is generated compared with prior art
Advantageous effect is：
1）The power supply circuit of the present invention can improve CPU power supply VR efficiency nearly 2 in the case where not influencing the application of CPU turbine technologies
It is a, all bring big advantage to the power consumption performance and cost of server；
2）The method of supplying power to of the present invention is based on inductance after current saturation the characteristics of inductance value rapid decrease, by existing power supply
One inductance of front end series connection of circuit, can improve CPU power supply nearly 2 points of VR efficiency, can save the power consumption of nearly 2W, give server
Power consumption performance and cost all bring big advantage.
Description of the drawings
Attached drawing 1 is the power supply circuit of existing Buck frameworks；
Attached drawing 2 is the power supply circuit of the present invention.
Specific implementation mode
In order to better illustrate the present invention, technical solution is done further in conjunction with specific embodiment and Figure of description
Explanation.Although having recorded these specific embodiments in embodiment, however, it is not to limit the invention, any skill
Have usually intellectual in art field, without departing from the spirit and scope of the present invention, when can make a little change and retouching, therefore
The scope of protection of the present invention is defined by those of the claims.
Embodiment one：
Below in conjunction with the accompanying drawings 2, a kind of Buck framework power supply circuits of raising power supply light-load efficiency of the present invention are made in detailed below
Explanation.
As shown in Fig. 2, the Buck framework power supply circuits of a kind of raising power supply light-load efficiency of the invention, power supply circuit packet
Include power supply Uin, metal-oxide-semiconductor, diode D, inductance L1, inductance L2, capacitance C, load RL；Power supply Uin anodes connect metal-oxide-semiconductor drain electrode；
Metal-oxide-semiconductor source electrode connects diode D cathodes, and diode D model machines connect power supply Uin cathode；Metal-oxide-semiconductor source electrode is also sequentially connected in series inductance L1
With inductance L2；The saturation current of inductance L1 is less than the saturation current of inductance L2；Capacitance C connects inductance with one end after load RL parallel connections
The current output terminal of L2, the other end connect power supply Uin cathode.
Inductance L1 and inductance L2 connects post package as a variable inductance, and one end tandem tap pipe Q of the variable inductance
Drain electrode, other end shunt capacitance C and load RL.
The inductance value of inductance L2 is 100NH, and the saturation current of inductance L2 is 205A；The inductance value of inductance L1 is 220NH, electricity
The saturation current for feeling L1 is 40A.
The input value of power supply Uin is 12V, and the switching frequency of output valve 1.8V, metal-oxide-semiconductor are 600K.
In the power supply circuit course of work of the present invention, it is rapidly saturated principle according to inductance, when electric current reaches 60A or more
When, inductance value is substantially saturated, practical sensibility reciprocal residue 20NH or so, and can keep substantially constant.When demands of the CPU to electric current
In 60A or less, the sensibility reciprocal in entire power supply circuit is 320NH, i.e. 220NH+100NH, meet electric current 60A or less situation
The demand of lower high sensibility reciprocal, to improve the efficiency of power supply conversion.After electric current is more than 60A, because electric current increase is quickly, inductance is very
Become 120NH, i.e. 20NH+100NH soon, meets the needs of high current and quick response.
It is close to improve CPU power supplies VR efficiency in the case where not influencing the application of CPU turbine technologies for the power supply circuit of the present invention
2 points all bring big advantage to the power consumption performance and cost of server.
Embodiment two：
Refer to the attached drawing 1,2, the present invention also provides a kind of Buck framework method of supplying power to improving power supply light-load efficiency, method of supplying power to bases
In inductance inductance value rapid decrease after current saturation the characteristics of, connect low saturation current in the front ends inductance L2 of power supply circuit
Inductance L1, and inductance L1 and inductance L2 are encapsulated as a variable inductance, and one end series-fed circuit of the variable inductance
Switching tube Q drain electrodes, the capacitance C and load RL of other end parallel operation circuit.
Refer to the attached drawing 2, involved power supply circuit include power supply Uin, metal-oxide-semiconductor, diode D, inductance L1, inductance L2, capacitance
C, RL is loaded；Power supply Uin anodes connect metal-oxide-semiconductor drain electrode；Metal-oxide-semiconductor source electrode connects diode D cathodes, diode D model machines connection electricity
Source Uin cathode；Metal-oxide-semiconductor source electrode is also sequentially connected in series inductance L1 and inductance L2；Capacitance C connects inductance L2 with one end after load RL parallel connections
Current output terminal, the other end connect power supply Uin cathode.
Inductance L1 and inductance L2 connects post package as a variable inductance, and one end tandem tap pipe Q of the variable inductance
Drain electrode, other end shunt capacitance C and load RL.
The inductance value of inductance L2 is 100NH, and the saturation current of inductance L2 is 205A；The inductance value of inductance L1 is 220NH, electricity
The saturation current for feeling L1 is 40A.
The input value of power supply Uin is 12V, and the switching frequency of output valve 1.8V, metal-oxide-semiconductor are 600K.
The method of supplying power to of the present invention is based on power supply circuit, principle is rapidly saturated according to inductance, when electric current reaches 60A or more
When, inductance value is substantially saturated, practical sensibility reciprocal residue 20NH or so, and can keep substantially constant.When demands of the CPU to electric current
In 60A or less, the sensibility reciprocal in entire power supply circuit is 320NH, i.e. 220NH+100NH, meet electric current 60A or less situation
The demand of lower high sensibility reciprocal, to improve the efficiency of power supply conversion.After electric current is more than 60A, because electric current increase is quickly, inductance is very
Become 120NH, i.e. 20NH+100NH soon, meets the needs of high current and quick response.
The method of supplying power to of the present invention is based on inductance after current saturation the characteristics of inductance value rapid decrease, by existing confession
One inductance of front end series connection of circuit, can improve CPU power supply nearly 2 points of VR efficiency, the power consumption of nearly 2W can be saved, to service
The power consumption performance and cost of device all bring big advantage.
Although the embodiment according to limited quantity describes the present invention, benefit from above description, the art
Technical staff should be understood that in the scope of the present invention thus described, it can be envisaged that other embodiment.
Additionally, it should be noted that the language used in this specification primarily to readable and introduction purpose and select
, rather than selected to explain or limit subject of the present invention.Therefore, in the model without departing from the appended claims
In the case of enclosing and being spiritual, for those skilled in the art, many modifications and changes are all apparent
's.For the scope of the present invention, the disclosure that the present invention is done is illustrative and be not restrictive, and the scope of the present invention is by appended
Claims limited.
Claims (10)
1. a kind of Buck framework power supply circuits improving power supply light-load efficiency, which is characterized in that the power supply circuit includes power supply
Uin, switching tube Q, diode D, inductance L1, inductance L2, capacitance C, load RL；The power supply Uin anodes connecting valve pipe Q leakages
Pole；The switching tube Q source electrodes connect diode D cathodes, and diode D model machines connect power supply Uin cathode；The switching tube Q source electrodes
Also it is sequentially connected in series inductance L1 and inductance L2；The saturation current of the inductance L1 is less than the saturation current of inductance L2；The capacitance C and
The current output terminal of one end connection inductance L2, the other end connect power supply Uin cathode after load RL parallel connections.
2. a kind of Buck framework power supply circuits improving power supply light-load efficiency according to claim 1, which is characterized in that institute
It is a variable inductance to state inductance L1 and inductance L2 series connection post packages, and one end tandem tap pipe Q of the variable inductance drains, separately
One end shunt capacitance C and load RL.
3. a kind of Buck framework power supply circuits improving power supply light-load efficiency according to claim 1, which is characterized in that institute
It states switching tube Q and selects metal-oxide-semiconductor.
4. a kind of Buck framework power supply circuits improving power supply light-load efficiency according to claim 1, which is characterized in that institute
The inductance value for stating inductance L2 is 100NH, and the saturation current of inductance L2 is 205A；The inductance value of the inductance L1 is 220NH, inductance
The saturation current of L1 is 35 A -45A.
5. a kind of Buck framework power supply circuits improving power supply light-load efficiency according to claim 4, which is characterized in that institute
The input value for stating power supply Uin is 12V, and the switching frequency of output valve 1.8V, the switching tube Q are 600K.
6. a kind of Buck framework method of supplying power to improving power supply light-load efficiency, which is characterized in that the method for supplying power to is based on inductance
After current saturation the characteristics of inductance value rapid decrease, the inductance for low saturation current of connecting in the front ends inductance L2 of power supply circuit
L1, and inductance L1 and inductance L2 are encapsulated as a variable inductance, and the switch of one end series-fed circuit of the variable inductance
Pipe Q drain electrodes, the capacitance C and load RL of other end parallel operation circuit.
7. a kind of Buck framework method of supplying power to improving power supply light-load efficiency according to claim 6, which is characterized in that institute
It includes power supply Uin, switching tube Q, diode D, inductance L1, inductance L2, capacitance C, load RL to state power supply circuit；The power supply Uin
Positive connecting valve pipe Q drain electrodes；The switching tube Q source electrodes connect diode D cathodes, and it is negative that diode D model machines connect power supply Uin
Pole；The switching tube Q source electrodes are also sequentially connected in series inductance L1 and inductance L2；The capacitance C connects electricity with one end after load RL parallel connections
Feel the current output terminal of L2, the other end connects power supply Uin cathode.
8. a kind of Buck framework method of supplying power to improving power supply light-load efficiency according to claim 7, which is characterized in that institute
It states switching tube Q and selects metal-oxide-semiconductor.
9. a kind of Buck framework method of supplying power to improving power supply light-load efficiency according to claim 7, which is characterized in that institute
The inductance value for stating inductance L2 is 100NH, and the saturation current of inductance L2 is 205A；The inductance value of the inductance L1 is 220NH, inductance
The saturation current of L1 is 35 A -45A.
10. a kind of Buck framework method of supplying power to improving power supply light-load efficiency according to claim 7, which is characterized in that
The input value of the power supply Uin is 12V, and the switching frequency of output valve 1.8V, the switching tube Q are 600K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078378.1A CN108319355A (en) | 2018-01-26 | 2018-01-26 | A kind of Buck framework power supply circuits improving power supply light-load efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078378.1A CN108319355A (en) | 2018-01-26 | 2018-01-26 | A kind of Buck framework power supply circuits improving power supply light-load efficiency |
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| CN108319355A true CN108319355A (en) | 2018-07-24 |
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ID=62888605
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|---|---|---|---|
| CN201810078378.1A Pending CN108319355A (en) | 2018-01-26 | 2018-01-26 | A kind of Buck framework power supply circuits improving power supply light-load efficiency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021077312A1 (en) * | 2019-10-22 | 2021-04-29 | 华为技术有限公司 | Conversion circuit and inductor |
| CN117118222A (en) * | 2023-04-28 | 2023-11-24 | 荣耀终端有限公司 | Step-down voltage conversion circuit and electronic device |
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| CN106026625A (en) * | 2016-06-26 | 2016-10-12 | 安徽朗格暖通设备有限公司 | Voltage conversion circuit and current control circuit thereof |
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| EP2151911A1 (en) * | 2008-08-06 | 2010-02-10 | ABB Schweiz AG | DC/DC-converter |
| CN102005920A (en) * | 2010-10-29 | 2011-04-06 | 华南理工大学 | Three-level buck type conversion circuit and method |
| CN202455265U (en) * | 2012-01-20 | 2012-09-26 | 苏州欧姆尼克新能源科技有限公司 | Buck type conversion circuit |
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| CN117118222A (en) * | 2023-04-28 | 2023-11-24 | 荣耀终端有限公司 | Step-down voltage conversion circuit and electronic device |
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Application publication date: 20180724 |