CN101662221A - High-efficiency linear power supply module - Google Patents
High-efficiency linear power supply module Download PDFInfo
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- CN101662221A CN101662221A CN200810048961A CN200810048961A CN101662221A CN 101662221 A CN101662221 A CN 101662221A CN 200810048961 A CN200810048961 A CN 200810048961A CN 200810048961 A CN200810048961 A CN 200810048961A CN 101662221 A CN101662221 A CN 101662221A
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Abstract
The invention relates to a high-efficiency linear power supply module, which improves the linear power supply efficiency and the power density of a fixed output voltage to the maximum so as to createan ultra-small sized block AC/DC linear power supply in a full power output range by adopting automatic tracking technology of input and output voltage of a power supply adjusting pipe. The module hasperfect using function of a linear power supply, and can be applied to all electronic products requiring the fixed linear power supply. The technology of the invention and various topology structuresof high voltage switch power supply, namely single-ended flyback, normal shock and various power supply pipes such as TOP and the like with low power output and half bridge, full bridge, push-pull and the like with high power output, can realize good interfaces and control by adopting synchronous rectification and active clamp technology. The technology of the invention has strong commonality, sothe module can be applied to the output power from a few watts to hundreds of watts, and can be extended to more than tens of kilowatts technically.
Description
Affiliated technical field
The present invention adopts the automatic tracking technique of power adjustment pipe output-input voltage, making fixedly, the linear power supply efficient and the power density of output voltage are promoted to greatest extent, thereby create the block AC/DC linear power supply of ultra-small volume in the total power output area, this technology belongs to the power supply electronic technical field.
Background technology
The linear power supply of fixed voltage output at present, in order to guarantee under situations such as load variations, power supply change in voltage, power adjustment pipe can both be operated in linear zone, and all there are several pressure reduction that lie prostrate tens volts at its two ends, when output current is big, power adjustment pipe just has very big power consumption, therefore, present linear power supply efficient is very low, secondly, power adjustment pipe must dispel the heat with radiator and blower fan, and this causes the volume of linear power supply to increase.
Low pressure difference linearity integrated regulator and module efficiency are higher, but working method still is passive, promptly can not control and change the power adjustment pipe input terminal voltage automatically, and in most cases, the characteristic that its efficient is high can not embody.In addition, this class device price height and power output have not quite also limited its range of application.
Switch power module is because of the efficient height, and use amount is also very big, but some technical indicators are too low, and still it is that output ripple is difficult to too greatly overcome, so at a lot of precise electronic products, particularly contain in the electronic product of analog quantity control and all can not use.
The power supply adaptor that adopts Industrial Frequency Transformer in addition of power supply is provided for small-power electronics product at present, this series products will consume a large amount of non-ferrous metals and silicon steel material, and efficient is low, and volume is big, and there is not the energy consumption that voltage stabilizing output and electronic product coupling have more increased product.
Summary of the invention
The present invention makes the power adjustment pipe input of linear power supply directly connect the secondary voltage of high voltage isolating switch power transformer, input and output side at power adjustment pipe takes out sampled voltage, deliver to the homophase and the inverting input subtraction of integrated operational amplifier respectively, with the difference voltage that calculates and set pressure reduction relatively after, with its error voltage the output voltage of high voltage isolating switch power is controlled, in the output voltage and output power range of all different sections, and supply power voltage changes, the pressure reduction at power adjustment pipe output input two ends can accurately be controlled at its critical saturated linear zone all the time, its power-consumption limitations arrives minimum, thereby the efficient of linear power supply is promoted to greatest extent.
The various topologys of the technology of the present invention and high-voltage switch power supply constitute, from half-bridge, the full-bridge of various power supply pipes such as the single-ended reverse exciting of small-power output, normal shock, TOP, high-power output, recommend etc., adopt synchronous rectification and active-clamp technology, can both realize good interface and control.
Because the power adjustment pipe power consumption of linear power supply is very little, the space that takies power supply is little, so the power density of this linear power supply module can be all close with switch power module under all different power outputs.
Technical spirit of the present invention and beneficial effect are:
1. the power consumption that electronic product is useless is all power supply, and the efficient that improves power supply can improve the energy consumption standard of product; China now uses the electronic product of linear power supply more than 1,000,000,000, and as if all adopting this module or this module high efficiency technology mode, in each product average year economize on electricity 30 degree, China can save more than an electric energy 30,000,000,000 degree in year.
2. the present invention has changed the inefficient situation of linear power supply recent decades, and energy savings and resource effectively improve the power density of linear power supply, reduce research and development, production and the manufacturing cost of associated electrical product;
3. technology highly versatile, the power output of module can both be suitable for from several watts to several hectowatts, and technology can extend to more than tens kilowatts;
4. switching type power supply and power module are because the restriction of working method, a lot of technical indicators are difficult to reach the requirement of precision DC stabilizer, and linear power supply is easy to accomplish, the present invention has broken through the inefficient bottleneck of linear power supply, will produce a kind of brand-new DC power supply theory and general layout;
5. linear power supply is very important a kind of power supply, its quality directly has influence on the performance index of various precise electronic products, and the method that linear power supply forms is a lot, level is uneven, the present invention will be to standard DC power supply industry market, work out the industry energy consumption standard and the national standard of each electronic product, plays positive model's effect.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 and Fig. 2 are basic principle block diagrams of the present invention.Be used to illustrate technical pattern feature of the present invention.
The adjustable pressurizer TL431 of " output voltage setting " available precision, various integrated regulator or other voltage regulation way are realized among Fig. 1 and Fig. 2.
General-purpose operation amplifiers such as " pressure differential resetting control " available LM358 or TL082 among Fig. 1 and Fig. 2.
" pulse width modulator " can be formed accurate negative feedback loop by adjustable pressurizer TL431 of precision and linear photoconductor coupling apparatus etc. and control normal shock that discrete component or single-chip power supply pipe form, instead swash the basic principle structured flowchart of the Switching Power Supply output of single-ended output among Fig. 1.
" pulse width modulator " can be made up of pulse width modulator integrated chip such as SG3524, the TL494 etc. of both-end output among Fig. 2, is used for different topology such as half-bridge, full-bridge, the basic principle structured flowchart of high power switching power supply output pulse width control such as recommends.
But Fig. 3, Fig. 4 and Fig. 5 are three typical case embodiment of the present invention, each components and parts uses and but component parameter is selected the detailed description that only is used for principle and the working method of this embodiment for use, because range of application of the present invention can set foot in the D.C. regulated power supply of whole fixedly output voltage and the electronic product of all employing linear power supplies, in actual applications, the difference according to its processing mode and demanded power output has a lot of different circuit composition structures.
Among Fig. 3, Fig. 4 and Fig. 5,3V voltage is one group of independent current source, superposition is on main output voltage, the necessary voltage of integrated regulator or multiple tube BG1 operate as normal is provided, to guarantee power adjustment pipe operate as normal under the pressure reduction below the 1V, under the situation of output voltage less than 9V, all right double as accessory power supply is as Fig. 3.
Fig. 6 is the typical volume size of two kinds of power outputs of the present invention, understand in order to perception high efficiency of the present invention and high power density, in fact, different according to output voltage and power output, the present invention can form more than ten kind of volume size and more than 100 kind of model specification kind.
Embodiment:
Fig. 3, Fig. 4 and Fig. 5 are the typical electrical schematic diagrams of three kinds of complete embodiment product design designs of the present invention, are described in detail below.
Fig. 3 can be used for the single-ended reverse exciting switching voltage regulator interface that constitutes with TOP series power supply pipe, and power output 30W is following, output current is less than the linear power supply module of 2A, and the overall efficiency of module is greater than 70%.
Among the figure, take out sampled voltage respectively from power adjustment pipe BG2 input/output terminal, deliver to homophase and the inverting input of operational amplifier IC2A, obtain difference voltage through the amplifier subtraction, this voltage is as the reference voltage of accurate pressurizer TL431 control, through photoelectrical coupler PC817A, the oscillating impulse width of control TOP247Y output reaches the stable floating voltage of output, and this is a close loop negative feedback process, if BG2 input voltage Vi ↑, then the IC2A output voltage ↑.The TL431 output voltage ↓, the PC817A output current ↑, the pulse duration of TOP247Y ↓, transformer B1 output voltage ↓, it is constant to reach power adjustment pipe input and output pressure reduction with this.Vice versa, and the ratio that changes resistance R 16 and R13 can change the size of BG2 input and output pressure reduction.Constitute current foldback circuit by elements such as IC2B; when overcurrent takes place when; the IC2B output HIGH voltage makes the BG3 saturation conduction; BG1 and BG2 end, and output voltage is 0, forms the positive feedback self-locking circuit by R22 and K1; K1 is a normally closed button; after getting rid of load faulty, click K1, module can be recovered operate as normal.
Fig. 4 be power output at 20-150W, output current can reach the above plurality of voltages output module exemplary embodiment of 10A.Boost voltage is the supply power mode that the supposition output voltage designs greater than 12V among the figure, if output voltage less than 12V, can adopt the method for supplying power to of Fig. 3.Among this figure, Rb is an equalizing resistance, when output current is very big, to guarantee a plurality of BG2 its output current mean allocation in parallel.In the second tunnel output, IC4 can adopt common three terminal regulator or low-dropout regulator, if output current is bigger, for raising the efficiency, also can adopt the principle method of main output, R10, R11, R12 need correctly to match according to factors such as each road output current size, precision of voltage regulation requirements among the figure.
Fig. 5 is the exemplary interface method of linear power supply and the semi-bridge switching voltage regulator be made up of power MOS pipe, and the power output of this circuit is rationally chosen parameter and the number of BG2 greater than 150W, and output current can be big arbitrarily.
Among Fig. 5, take out sampled voltage respectively from power adjustment pipe BG2 I/O, deliver to homophase and the inverting input of operational amplifier IC2A, behind subtraction, obtain difference voltage, deliver to the inverting input of IC1, compare with the reference voltage of in-phase input end, its error voltage comes the pulse duration of control IC 1 output, reach the stable floating voltage of output, said process is a close loop negative feedback process, establish the input voltage Vi of power adjustment pipe BG2 ↑, the IC2A output voltage ↑, the pulsewidth width of IC2 output voltage ↓, the high frequency transformer output voltage ↓, it is constant to reach power adjustment pipe input and output pressure reduction with this.Vice versa.
Common problem processing method of the present invention: in theory, power adjustment pipe input and output pressure reduction is more little, the efficient of linear power supply module is high more, power density is big more, if input filtering capacitor C 8 infinities of power adjustment pipe, can accomplish, but C8 is big more, volume is big more, cost is high more, thus these 2 to rationally match, from semiconductor technology and material cost are taken all factors into consideration now, the saturation voltage drop Vb+0.2V that earlier pressure reduction is decided to be power adjustment pipe determines that again the size of C8 capacity is comparatively reasonable guaranteeing that power adjustment pipe is fully operational under the condition of linear zone.
Claims (3)
1. high-efficiency linear power supply module, a kind of new series A C/DC power supply product that the efficient of linear power supply of fixed voltage output and power density are promoted to greatest extent and create, it is characterized in that: the power adjustment pipe input of linear power supply directly connects the secondary voltage of high voltage isolating switch power, input and output side at power adjustment pipe takes out sampled voltage, deliver to the homophase and the inverting input subtraction of integrated operational amplifier respectively, with the difference voltage that calculates and set pressure reduction relatively after, with its error voltage the output voltage of high voltage isolating switch power is controlled, no matter how supply power voltage and power output change, and the pressure reduction at power adjustment pipe input and output two ends accurately is controlled at its critical saturated linear zone all the time.
2. high-efficiency linear power supply module according to claim 1, it is characterized in that: the various topologys of automatic tracking technique of power adjustment pipe input and output voltage and high voltage isolating switch power constitute, half-bridge, the full-bridge of various power supply pipes such as the single-ended reverse exciting of small-power output, normal shock, TOP series, high-power output, synchronous rectification and active-clamp technology recommended, adopted, good interface and control can both be realized.
3. high-efficiency linear power supply module according to claim 1 is characterized in that: independently direct voltage is to the circuit supply of control power adjustment pipe output voltage and electric current greater than 3v by one, and this voltage is superimposed upon on the input voltage of power adjustment pipe.
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| CN200810048961A CN101662221A (en) | 2008-08-25 | 2008-08-25 | High-efficiency linear power supply module |
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| CN200810048961A CN101662221A (en) | 2008-08-25 | 2008-08-25 | High-efficiency linear power supply module |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011098000A1 (en) * | 2010-02-11 | 2011-08-18 | 北京联想软件有限公司 | Power adapter and portable computer |
| CN103123511A (en) * | 2013-01-23 | 2013-05-29 | 浙江工业大学 | Hybrid type voltage-stabilized power supply |
| CN103236781A (en) * | 2013-04-21 | 2013-08-07 | 中国科学院光电技术研究所 | High-efficiency linear high-voltage stabilized power supply |
| CN103337959A (en) * | 2013-06-17 | 2013-10-02 | 东软飞利浦医疗设备系统有限责任公司 | Low-noise continuously adjustable DC power supply and modulation method thereof |
| CN104716845A (en) * | 2013-12-13 | 2015-06-17 | 上海普锐马电子有限公司 | Cyclic wave falling generator with over-current protection function |
| CN105553297A (en) * | 2016-01-25 | 2016-05-04 | 四川长虹电器股份有限公司 | Non-isolated switching power supply circuit for super wide voltage input |
| CN106301029A (en) * | 2016-10-25 | 2017-01-04 | 广东工业大学 | A kind of switch power supply line structure |
| CN110557024A (en) * | 2019-09-12 | 2019-12-10 | 北京精密机电控制设备研究所 | Magnetic feedback DCDC conversion circuit |
| CN116578154A (en) * | 2023-06-13 | 2023-08-11 | 陕西四方华能电气设备有限公司 | Automatic voltage tracking method and system for voltage regulator |
-
2008
- 2008-08-25 CN CN200810048961A patent/CN101662221A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9236766B2 (en) | 2010-02-11 | 2016-01-12 | Beijing Lenovo Software Ltd. | Control of a power adapter with energy storage elements based on output voltage thresholds |
| WO2011098000A1 (en) * | 2010-02-11 | 2011-08-18 | 北京联想软件有限公司 | Power adapter and portable computer |
| CN103123511A (en) * | 2013-01-23 | 2013-05-29 | 浙江工业大学 | Hybrid type voltage-stabilized power supply |
| CN103123511B (en) * | 2013-01-23 | 2014-11-12 | 浙江工业大学 | Hybrid type voltage-stabilized power supply |
| CN103236781A (en) * | 2013-04-21 | 2013-08-07 | 中国科学院光电技术研究所 | High-efficiency linear high-voltage stabilized power supply |
| CN103337959A (en) * | 2013-06-17 | 2013-10-02 | 东软飞利浦医疗设备系统有限责任公司 | Low-noise continuously adjustable DC power supply and modulation method thereof |
| CN103337959B (en) * | 2013-06-17 | 2016-05-11 | 飞利浦(中国)投资有限公司 | The continuous adjustable DC power supply of low noise and modulator approach thereof |
| CN104716845A (en) * | 2013-12-13 | 2015-06-17 | 上海普锐马电子有限公司 | Cyclic wave falling generator with over-current protection function |
| CN105553297A (en) * | 2016-01-25 | 2016-05-04 | 四川长虹电器股份有限公司 | Non-isolated switching power supply circuit for super wide voltage input |
| CN105553297B (en) * | 2016-01-25 | 2018-05-25 | 四川长虹电器股份有限公司 | A kind of Unisolated switch power circuit of super wide voltage input |
| CN106301029A (en) * | 2016-10-25 | 2017-01-04 | 广东工业大学 | A kind of switch power supply line structure |
| CN110557024A (en) * | 2019-09-12 | 2019-12-10 | 北京精密机电控制设备研究所 | Magnetic feedback DCDC conversion circuit |
| CN116578154A (en) * | 2023-06-13 | 2023-08-11 | 陕西四方华能电气设备有限公司 | Automatic voltage tracking method and system for voltage regulator |
| CN116578154B (en) * | 2023-06-13 | 2023-11-21 | 陕西四方华能电气设备有限公司 | Automatic voltage tracking method and system for voltage regulator |
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Owner name: WUHAN YUANHEXIANG TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CHENG JIEBAO Effective date: 20111014 |
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Effective date of registration: 20111014 Address after: 430074, room 2, unit 2104, Pioneer Street, East Lake New Technology Development Zone, Wuhan, Hubei, China Applicant after: Wuhan source and Xiang Technology Co., Ltd. Address before: 430074, Hubei, Wuhan province Hongshan District South Lake Road, clear water (phase two) 2, Building 102, room four Applicant before: Cheng Jiebao |
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