CN201774456U - Efficient switch power supply with quasi resonant technology - Google Patents
Efficient switch power supply with quasi resonant technology Download PDFInfo
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- CN201774456U CN201774456U CN2010202974373U CN201020297437U CN201774456U CN 201774456 U CN201774456 U CN 201774456U CN 2010202974373 U CN2010202974373 U CN 2010202974373U CN 201020297437 U CN201020297437 U CN 201020297437U CN 201774456 U CN201774456 U CN 201774456U
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Abstract
The utility model discloses an efficient switch power supply with quasi resonant technology, which comprises a signal acquisition module, a control module, a transforming and rectifying module, a switch module and an output module, wherein the signal acquisition module is connected on an input power wire, trough signals of an input power supply is acquired by the signal acquisition module and input to the control module, the power is transformed and rectified by the transforming and rectifying module and then input to the switch module, the control module controls on-off of the switch module, the switch module outputs the power to the output module, and the output module outputs the power. As for the efficient switch power supply, when the wave form of the input power supply is located at trough, the control unit controls a field-effect tube to be conducted, simultaneously, a parasitic capacitor in the circuit is charged to have minimum voltage, and a conducted current peak is minimized; and as the parasitic capacitor is not charged, the current peak can not appear, thus being capable of realizing the maximum conversion efficiency, and effectively reducing electro-magnetic interference (EMI).
Description
Technical field
The utility model discloses a kind of Switching Power Supply, particularly a kind of efficient switch power supply of quasi-resonance technology.
Background technology
Switching Power Supply is the time ratio that turns on and off by the control switch pipe, keeps a kind of power supply of regulated output voltage, and Switching Power Supply generally is made of pulse width modulation (PWM) control IC and MOSFET.Switching Power Supply is with its energy-conservation, of many uses etc. being widely used in the daily life, because present Switching Power Supply all is according to the conducting of setting the control metal-oxide-semiconductor by control IC, because the input power supply is to be sinusoidal wave form, and the conducting of MOS is at random, if when conducting moment input power supply was in rising edge or trailing edge or crest, the load meeting produced extra waste.
Summary of the invention
Conducting at the above-mentioned metal-oxide-semiconductor of mentioning of the prior art is at random, the utility model provides a kind of efficient switch power supply of new quasi-resonance technology, by detecting the waveform situation of input power supply, makes metal-oxide-semiconductor in the conducting of trough place, promote power-efficient, can reduce EMI simultaneously.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of efficient switch power supply of quasi-resonance technology, Switching Power Supply comprises signal acquisition module, control module, the transformation rectification module, switch module and output module, signal acquisition module is connected on the input power cord, import the trough signal of power supply and input to control module by the signal acquisition module collection, power supply inputs to switch module after by the rectification of transformation rectification module transformation, the switch of control module control switch module, the switch module out-put supply is given output module, carries out power supply output through output module.
The technical scheme that its technical problem that solves the utility model adopts further comprises:
Described Switching Power Supply also includes feedback module, and feedback module is connected on the output module, and output feedback signal is given control module.
It is the efficient self-adapted multimode PWM controller of OB2361 that described control module adopts model.
Described switch module adopts field effect transistor.
Described signal acquisition module adopts resistance R that is connected in series 1 and the resistance R 2 that is connected across on two power lines, the common junction place output trough signal of resistance R 1 and resistance R 2 is given resistance R 9 and the resistance R 10 that is connected in series, and the common junction place of resistance R 9 and resistance R 10 outputs signal to control module.
Described power input line comprises live wire and zero line, is in series with protective tube on the live wire.
Cross-over connection has piezo-resistance between described live wire and the zero line.
The beneficial effects of the utility model are: when the utility model is positioned at wave trough position at the waveform of input power supply, the conducting of control unit control field effect transistor, at this moment, parasitic capacitance in the circuit is charged to minimum voltage, the current spike of conducting will minimize, because not charging of parasitic capacitance, so current spike can not occur, therefore can realize maximum conversion efficiency, effectively reduce EMI.
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Description of drawings
Fig. 1 is the utility model circuit block diagram.
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
Present embodiment is the utility model preferred implementation, and other all its principles are identical with present embodiment or approximate with basic structure, all within the utility model protection range.
Please referring to accompanying drawing 1 and accompanying drawing 2, the utility model mainly comprises signal acquisition module, control module, transformation rectification module, switch module and output module, signal acquisition module is connected on the input power cord, import the trough signal of power supply and input to control module by the signal acquisition module collection, power supply inputs to switch module after by the rectification of transformation rectification module transformation, the switch of control module control switch module, the switch module out-put supply is given output module, carries out power supply output through output module.The utility model adopts the alternating current 220V civil power as the input power supply, its input power cord includes each one of live wire and zero line, bring damage in order to prevent that electric current is excessive to the utility model, in the present embodiment, on live wire, be connected in series with protective tube F1, cross-over connection has piezo-resistance VR1 between live wire and the zero line, to prevent the lightning fire surge current the utility model is caused damage.Cross-over connection has resistance R 1 and the resistance R 2 that is connected in series between live wire and the zero line, the common junction place of resistance R 1 and resistance R 2 is connected to control module, power to control module, simultaneously, input control module after the common junction voltage process resistance R 9 of resistance R 1 and resistance R 2 and the dividing potential drop of resistance R 10 is as the trough signal of input power supply.In the present embodiment, it is the efficient self-adapted multimode PWM controller U1 of OB2361 that control module adopts model, and the trough signal of power supply is imported first pin (being the DEM pin).Live wire and zero line input power supply carry out transformation, rectification through the transformation rectification module, and transformation adopts transformer LF1, and bridge commutating is adopted in rectification, and in the present embodiment, rectifier transformer adopts means commonly used to carry out.Input to switch module after the transformation of input power supply process transformation rectification module, the rectification, in the present embodiment, switch module adopts field effect transistor Q1 (being MOSFET), the grid of field effect transistor Q1 is connected with the 5th pin (being the GATE pin) of efficient self-adapted multimode PWM controller U1, by the break-make of efficient self-adapted multimode PWM controller U1 control field effect transistor Q1, thus the switch of realization power supply.The input power supply converts square wave to through switch element, and then after the transformation amplification through transformer T1, inputs to output module, exports powering load through after the shaping of output module.
The utility model inputs to efficient self-adapted multimode PWM controller U1 from output module output two-way feedback signal through feedback module, in the present embodiment, input optocoupler U2 after first via feedback signal process resistance R 14 and resistance R 15 dividing potential drops, input optocoupler U2 after the second tunnel feedback signal process resistance R 18 and resistance R 20 dividing potential drops, by photoelectrical coupler U2, the two-way feedback signal is inputed to the 3rd pin (being the FB pin) of efficient self-adapted multimode PWM controller U1, when output signal voltage is too high, in order to prevent that load from damaging, efficient self-adapted multimode PWM controller U1 control field effect transistor Q1 ends.
The utility model in use, efficient self-adapted multimode PWM controller U1 detects the waveform of input power supply, when the waveform of input power supply is positioned at wave trough position, efficient self-adapted multimode PWM controller U1 control field effect transistor Q1 conducting, at this moment, parasitic capacitance in the circuit is charged to minimum voltage, the current spike of conducting will minimize, because not charging of parasitic capacitance, so current spike can not occur, therefore can realize maximum conversion efficiency, effectively reduce EMI.
Claims (7)
1. the efficient switch power supply of a quasi-resonance technology, it is characterized in that: described Switching Power Supply comprises signal acquisition module, control module, transformation rectification module, switch module and output module, signal acquisition module is connected on the input power cord, import the trough signal of power supply and input to control module by the signal acquisition module collection, power supply inputs to switch module after by the rectification of transformation rectification module transformation, the switch of control module control switch module, the switch module out-put supply is given output module, carries out power supply output through output module.
2. the efficient switch power supply of quasi-resonance technology according to claim 1 is characterized in that: described Switching Power Supply also includes feedback module, and feedback module is connected on the output module, and output feedback signal is given control module.
3. the efficient switch power supply of quasi-resonance technology according to claim 1 and 2 is characterized in that: it is the efficient self-adapted multimode PWM controller of OB2361 that described control module adopts model.
4. the efficient switch power supply of quasi-resonance technology according to claim 1 and 2 is characterized in that: described switch module adopts field effect transistor.
5. the efficient switch power supply of quasi-resonance technology according to claim 1 and 2, it is characterized in that: described signal acquisition module adopts resistance R that is connected in series 1 and the resistance R 2 that is connected across on two power lines, the common junction place output trough signal of resistance R 1 and resistance R 2 is given resistance R 9 and the resistance R 10 that is connected in series, and the common junction place of resistance R 9 and resistance R 10 outputs signal to control module.
6. the efficient switch power supply of quasi-resonance technology according to claim 1 and 2 is characterized in that: described power input line comprises live wire and zero line, is in series with protective tube on the live wire.
7. the efficient switch power supply of quasi-resonance technology according to claim 6 is characterized in that: cross-over connection has piezo-resistance between described live wire and the zero line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202974373U CN201774456U (en) | 2010-08-19 | 2010-08-19 | Efficient switch power supply with quasi resonant technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202974373U CN201774456U (en) | 2010-08-19 | 2010-08-19 | Efficient switch power supply with quasi resonant technology |
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| CN201774456U true CN201774456U (en) | 2011-03-23 |
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| CN2010202974373U Expired - Lifetime CN201774456U (en) | 2010-08-19 | 2010-08-19 | Efficient switch power supply with quasi resonant technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095121A (en) * | 2011-10-27 | 2013-05-08 | 亚荣源科技（深圳）有限公司 | Electromagnetic wave suppression circuit of power supply |
| CN103828210A (en) * | 2011-07-07 | 2014-05-28 | 西门子公司 | Switching converter and method for controlling the switching converter |
| CN104869693A (en) * | 2014-02-26 | 2015-08-26 | 英飞凌科技奥地利有限公司 | Valley to valley switching in quasi-resonant mode for driver |
-
2010
- 2010-08-19 CN CN2010202974373U patent/CN201774456U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103828210A (en) * | 2011-07-07 | 2014-05-28 | 西门子公司 | Switching converter and method for controlling the switching converter |
| CN103828210B (en) * | 2011-07-07 | 2017-04-05 | 西门子公司 | Dc-dc converter and the method for adjusting dc-dc converter |
| CN103095121A (en) * | 2011-10-27 | 2013-05-08 | 亚荣源科技（深圳）有限公司 | Electromagnetic wave suppression circuit of power supply |
| CN104869693A (en) * | 2014-02-26 | 2015-08-26 | 英飞凌科技奥地利有限公司 | Valley to valley switching in quasi-resonant mode for driver |
| US9660542B2 (en) | 2014-02-26 | 2017-05-23 | Infineon Technologies Austria Ag | Valley to valley switching in quasi-resonant mode for driver |
| CN104869693B (en) * | 2014-02-26 | 2018-09-25 | 英飞凌科技奥地利有限公司 | The trough of quasi-resonant mode for driver switches to trough |
| US10243472B2 (en) | 2014-02-26 | 2019-03-26 | Infineon Technologies Austria Ag | Valley to valley switching in quasi-resonant mode for driver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: MOSO POWER SUPPLY TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN MOSO POWER SUPPLY TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Shenzhen Nanshan District City, Guangdong province 518000 industrial park outside the small pine Tai Bai Lu Bai mang mulberry 6 layer Patentee after: MOSO Power Supply Technology Co., Ltd. Address before: Shenzhen Nanshan District City, Guangdong province 518000 industrial park outside the small pine Tai Bai Lu Bai mang mulberry 6 layer Patentee before: Shenzhen MoSo Power Supply Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110323 |