CN107295718B - Balanced synchronous driving circuit for realizing high-power LED illumination - Google Patents
Balanced synchronous driving circuit for realizing high-power LED illumination Download PDFInfo
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- CN107295718B CN107295718B CN201710550826.9A CN201710550826A CN107295718B CN 107295718 B CN107295718 B CN 107295718B CN 201710550826 A CN201710550826 A CN 201710550826A CN 107295718 B CN107295718 B CN 107295718B
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- switching power
- power supply
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
-
- 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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention discloses an equalizing synchronous driving circuit for realizing high-power LED illumination, at least two switching power supplies and each switching power supply are correspondingly provided with an equalizing synchronous circuit, the switching power supplies are mutually connected in parallel to convert alternating current and provide adaptive power supply for driving an LED load, the blocking end of the equalizing synchronous circuit is electrically connected with the interference signal outflow end of the corresponding switching power supply, the conducting ends of the equalizing synchronous circuit are respectively and electrically connected with the conducting ends of the equalizing synchronous circuit on other switching power supplies to prevent the interference signals of the switching power supplies from flowing out and influencing each other among the parallel switching power supplies.
Description
Technical Field
The invention relates to an LED driving circuit, in particular to an equalizing synchronous driving circuit for realizing high-power LED illumination.
Background
Nowadays, LEDs are applied to living aspects, with the progress of science, the power of the LED load is increasingly increased, and some manufacturers adopt a single high-power output switching power supply circuit to drive the high-power LED load, so that the high-power output switching power supply circuit needs to be specially designed by personnel, calculates the actual power of each LED load, selects corresponding electrical elements for construction, has a very complicated process, and needs to design the switching power supply circuit again for different types of LED loads.
The factory tries to adopt a mode that a plurality of low-power switching power supplies are mutually connected in parallel to output to convert alternating current and provide an adaptive power supply load for an LED load, however, in the actual design process, certain oscillation interference signals can be generated in output due to the fact that the switching power supplies internally comprise electric elements such as inductors, and the like, wherein one low-power switching power supply generates the interference signals, and the interference signals can flow into other switching power supplies from a parallel circuit to influence other switching power supplies and the LED load.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an equalization synchronous driving circuit capable of realizing high-power LED illumination.
The technical scheme adopted by the invention is as follows:
an equalization synchronous driving circuit for realizing high-power LED illumination comprises,
at least two switching power supplies connected in parallel to each other to convert alternating current and provide adapted supply power for driving the LED load;
each switching power supply is correspondingly provided with an equalization synchronous circuit, the equalization synchronous circuit is provided with a blocking end and a conducting end, the equalization synchronous circuit can prevent interference signals from flowing from the blocking end to the conducting end, the blocking end of the equalization synchronous circuit is electrically connected with the interference signal outflow end of the corresponding switching power supply, and the conducting end of the equalization synchronous circuit is electrically connected with the conducting ends of the equalization synchronous circuits on other switching power supplies respectively so as to prevent the interference signals of the switching power supplies from flowing out and mutually influencing the switching power supplies which are mutually connected in parallel.
The switching power supply comprises a first switching power supply and a second switching power supply, wherein the first switching power supply comprises a first switching power supply module, an inductor L1, a resistor R1 and a capacitor C1, the second switching power supply comprises a second switching power supply module, an inductor L2, a resistor R2 and a capacitor C2, the balanced synchronous circuit comprises a first balanced synchronous circuit corresponding to the first switching power supply and a second balanced synchronous circuit corresponding to the second switching power supply, and the first balanced synchronous circuit and the second balanced synchronous circuit are respectively provided with a blocking end and a conducting end and can prevent interference signals from flowing from the blocking end to the conducting end;
the L pole input end of the first switching power supply module is respectively and electrically connected with the L pole input end of the second switching power supply module and the L pole of external alternating current, and the N pole input end of the first switching power supply module is respectively and electrically connected with the N pole input end of the second switching power supply module and the N pole input end of external alternating current;
the positive output end of the first switching power supply module is electrically connected with one end of a resistor R1, one end of a capacitor C1, the positive output end of the second switching power supply module, one end of a resistor R2, one end of a capacitor C2 and the anode of the LED load respectively;
the negative electrode output end of the first switch power supply module is electrically connected with one end of the inductor L1, and the negative electrode output end of the second switch power supply module is electrically connected with one end of the inductor L2;
the other end of the inductor L1 is respectively and electrically connected with the other end of the resistor R1, the other end of the capacitor C1 and the blocking end of the first equalization synchronization circuit;
the conducting end of the first equalization synchronous circuit is electrically connected with the conducting end of the second equalization synchronous circuit and the cathode of the LED load respectively;
the blocking end of the second equalization synchronization circuit is respectively and electrically connected with the other end of the capacitor C2, the other end of the resistor R2 and the other end of the inductor L2.
The first equalization synchronization circuit comprises a diode D1, and the cathode of the diode D1 is respectively and electrically connected with the other end of the inductor L1, the other end of the resistor R1 and the other end of the capacitor C1; the anode of the diode D1 is electrically connected with the conducting end of the second equalization synchronous circuit and the cathode of the LED load respectively.
The second equalization synchronization circuit comprises a diode D2, and the cathode of the diode D2 is respectively and electrically connected with the other end of the inductor L2, the other end of the resistor R2 and the other end of the capacitor C2; the anode of the diode D2 is electrically connected with the conducting end of the first equalization synchronous circuit and the cathode of the LED load respectively.
The invention has the beneficial effects that:
the driving circuit adopts at least two low-power switching power supplies which are connected in parallel, the input end of the switching power supply is connected with the L pole and the N pole of external alternating current, the blocking end of the balanced synchronous circuit is connected with the interference signal outflow end of the switching power supply, the conducting end of the balanced synchronous circuit is electrically connected with the conducting ends of the balanced synchronous circuits on other switching power supplies, namely the interference signal outflow ends of the switching power supplies are connected in parallel through corresponding balanced synchronous circuits, interference signals of the switching power supplies cannot enter the other switching power supplies through the balanced synchronous circuits, and the other switching power supplies are influenced.
Drawings
The following describes the embodiments of the present invention further with reference to the drawings.
Fig. 1 is a circuit schematic of a driving circuit of the present invention.
Detailed Description
As shown in fig. 1, the balanced synchronous driving circuit for realizing high-power LED lighting of the present invention includes at least two switching power supplies 1, and a balanced synchronous circuit 2 is correspondingly disposed on each switching power supply 1, and the switching power supplies 1 are connected in parallel to each other to convert alternating current and provide adaptive power supply for driving an LED load 3;
the equalization synchronization circuit 2 has a blocking end and a conducting end, and the equalization synchronization circuit 2 can prevent interference signals from flowing from the blocking end to the conducting end, the blocking end of the equalization synchronization circuit 2 is electrically connected with the corresponding interference signal outflow end of the switching power supply 1, and the conducting ends of the equalization synchronization circuit 2 are respectively electrically connected with the conducting ends of the equalization synchronization circuits 2 on the other switching power supplies 1 to prevent the interference signals of the switching power supplies 1 from flowing out and mutually influencing each other between the switching power supplies 1 connected in parallel.
The switching power supply 1 generally comprises a switching power supply module and an accessory circuit thereof, the switching power supply module may be a component such as a switching power supply chip, and may also include other components such as a transformer, the accessory circuit generally comprises electrical components such as a resistor, a capacitor, and an inductor, and based on the basic characteristics of the switching power supply 1, during the operation of the switching power supply, an oscillating interference signal often flows out from an inductor end, and in the preferred scheme of the design, the interference signal outflow end of the switching power supply 1 may be the inductor end from which the oscillating interference signal flows out.
The design adopts at least two low-power switching power supplies to be connected in parallel, the input end of the switching power supply 1 is connected with the L pole and the N pole of external alternating current, the blocking end of the balanced synchronous circuit 2 is connected with the interference signal outflow end of the switching power supply 1, the conducting end of the balanced synchronous circuit 2 is electrically connected with the conducting ends of the balanced synchronous circuits 2 on the other switching power supplies 1, that is, the interference signal outflow ends of the switching power supplies 1 are connected in parallel through the corresponding balanced synchronous circuits 2, the interference signals of the switching power supplies 1 cannot enter the other switching power supplies 1 through the balanced synchronous circuits 2, the influence is caused on the other switching power supplies 1, the design driving circuit is not required to be developed again aiming at the LED loads 3 with different power types by using a large amount of resources and time, the mutual influence of the interference signals of the switching power supplies 1 in the parallel circuits is prevented, and the balanced power supply and the synchronous starting of the LED loads 3 is realized at the same time of mutual noninterference between the switching power supplies 1.
In a preferred embodiment of the design, the design may be composed of a plurality of switching power supplies 1, two of which are taken as examples, and the number of the actual switching power supplies 1 may be 2, 3 or n, wherein the switching power supplies 1 include a first switching power supply 11 and a second switching power supply 12, the first switching power supply 11 includes a first switching power supply module 111, an inductor L1, a resistor R1 and a capacitor C1, the second switching power supply 12 includes a second switching power supply module 121, an inductor L2, a resistor R2 and a capacitor C2, the equalization synchronization circuit 2 includes a first equalization synchronization circuit 21 corresponding to the first switching power supply 11 and a second equalization synchronization circuit 22 corresponding to the second switching power supply 12, and the first equalization synchronization circuit 21 and the second equalization synchronization circuit 22 each have a blocking end and a conducting end and are capable of preventing interference signals from flowing from the blocking end to the conducting end;
the input end of the L pole of the first switching power supply module 111 is respectively and electrically connected with the input end of the L pole of the second switching power supply module 121 and the L pole of external alternating current, and the input end of the N pole of the first switching power supply module 111 is respectively and electrically connected with the input end of the N pole of the second switching power supply module 121 and the input end of the N pole of external alternating current;
the positive output end of the first switching power supply module 111 is electrically connected with one end of the resistor R1, one end of the capacitor C1, the positive output end of the second switching power supply module 121, one end of the resistor R2, one end of the capacitor C2 and the anode of the LED load 3 respectively;
the negative output end of the first switching power supply module 111 is electrically connected with one end of the inductor L1, and the negative output end of the second switching power supply module 121 is electrically connected with one end of the inductor L2;
the other end of the inductor L1 is respectively and electrically connected with the other end of the resistor R1, the other end of the capacitor C1 and the blocking end of the first equalization synchronization circuit 21;
the conducting end of the first equalization synchronization circuit 21 is electrically connected with the conducting end of the second equalization synchronization circuit 22 and the cathode of the LED load 3 respectively;
the blocking end of the second equalization synchronization circuit 22 is electrically connected to the other end of the capacitor C2, the other end of the resistor R2, and the other end of the inductor L2, respectively.
The input ends of the first switch power supply module 111 and the second switch power supply module 121 are connected with alternating current, the positive output ends of the first switch power supply module 111 and the second switch power supply module 121 are connected in parallel and then connected with the anode of the LED load 3 to supply power to the LED load 3, current flows from the LED load 3 and then is shunted into each equalization synchronization circuit, and the current can flow from the conducting end to the blocking end of the equalization synchronization circuit 2 and finally flows back to the negative output ends of the first switch power supply module 111 and the second switch power supply module 121. When the inductance L1 or the inductance L2 flows out of the oscillation interference signal, the equalization synchronization circuit will block the oscillation interference signal, and the interference signal cannot flow from the blocking end to the conducting end of the equalization synchronization circuit 2, which affects other switching power supplies.
The first equalization synchronization circuit 21 includes a diode D1, wherein a cathode of the diode D1 is electrically connected to the other end of the inductor L1, the other end of the resistor R1, and the other end of the capacitor C1, respectively; the anode of the diode D1 is electrically connected with the conducting end of the second equalization synchronization circuit 22 and the cathode of the LED load 3 respectively, the second equalization synchronization circuit 22 comprises a diode D2, and the cathode of the diode D2 is electrically connected with the other end of the inductor L2, the other end of the resistor R2 and the other end of the capacitor C2 respectively; the anode of the diode D2 is electrically connected with the conducting end of the first equalization synchronization circuit 21 and the cathode of the LED load 3 respectively, the function of the equalization synchronization circuit is realized by adopting the diode, and the diode has a simple structure and good blocking performance.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments, as long as the technical solutions for achieving the objects of the present invention by substantially the same means are all within the scope of the present invention.
Claims (3)
1. Realize balanced synchronous drive circuit of high-power LED illumination, its characterized in that includes: at least two switching power supplies connected in parallel to each other to convert alternating current and provide adapted supply power for driving the LED load;
each switching power supply is correspondingly provided with an equalization synchronous circuit, the equalization synchronous circuit is provided with a blocking end and a conducting end, the equalization synchronous circuit can prevent interference signals from flowing from the blocking end to the conducting end, the blocking end of the equalization synchronous circuit is electrically connected with the interference signal outflow end of the corresponding switching power supply, and the conducting end of the equalization synchronous circuit is electrically connected with the conducting end of the equalization synchronous circuit on another switching power supply and the cathode of the LED load respectively so as to prevent the interference signals of the switching power supplies from flowing out and affecting each other among the switching power supplies which are connected in parallel;
the switching power supply comprises a first switching power supply and a second switching power supply, wherein the first switching power supply comprises a first switching power supply module, an inductor L1, a resistor R1 and a capacitor C1, the second switching power supply comprises a second switching power supply module, an inductor L2, a resistor R2 and a capacitor C2, the balanced synchronous circuit comprises a first balanced synchronous circuit corresponding to the first switching power supply and a second balanced synchronous circuit corresponding to the second switching power supply, and the first balanced synchronous circuit and the second balanced synchronous circuit are respectively provided with a blocking end and a conducting end and can prevent interference signals from flowing from the blocking end to the conducting end;
the L pole input end of the first switching power supply module is respectively and electrically connected with the L pole input end of the second switching power supply module and the L pole of external alternating current, and the N pole input end of the first switching power supply module is respectively and electrically connected with the N pole input end of the second switching power supply module and the N pole input end of external alternating current;
the positive output end of the first switching power supply module is electrically connected with one end of a resistor R1, one end of a capacitor C1, the positive output end of the second switching power supply module, one end of a resistor R2, one end of a capacitor C2 and the anode of the LED load respectively;
the negative electrode output end of the first switch power supply module is electrically connected with one end of the inductor L1, and the negative electrode output end of the second switch power supply module is electrically connected with one end of the inductor L2;
the other end of the inductor L1 is respectively and electrically connected with the other end of the resistor R1, the other end of the capacitor C1 and the blocking end of the first equalization synchronization circuit;
the conducting end of the first equalization synchronous circuit is electrically connected with the conducting end of the second equalization synchronous circuit and the cathode of the LED load respectively;
the blocking end of the second equalization synchronization circuit is respectively and electrically connected with the other end of the capacitor C2, the other end of the resistor R2 and the other end of the inductor L2;
wherein the first equalization synchronization circuit includes a diode D1 and the second equalization synchronization circuit includes a diode D2.
2. The balanced synchronous driving circuit for realizing high-power LED illumination according to claim 1, wherein: the cathode of the diode D1 is respectively and electrically connected with the other end of the inductor L1, the other end of the resistor R1 and the other end of the capacitor C1; the anode of the diode D1 is electrically connected with the conducting end of the second equalization synchronous circuit and the cathode of the LED load respectively.
3. The balanced synchronous driving circuit for realizing high-power LED illumination according to claim 1, wherein: the cathode of the diode D2 is respectively and electrically connected with the other end of the inductor L2, the other end of the resistor R2 and the other end of the capacitor C2; the anode of the diode D2 is electrically connected with the conducting end of the first equalization synchronous circuit and the cathode of the LED load respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710550826.9A CN107295718B (en) | 2017-07-07 | 2017-07-07 | Balanced synchronous driving circuit for realizing high-power LED illumination |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710550826.9A CN107295718B (en) | 2017-07-07 | 2017-07-07 | Balanced synchronous driving circuit for realizing high-power LED illumination |
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| Publication Number | Publication Date |
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| CN107295718A CN107295718A (en) | 2017-10-24 |
| CN107295718B true CN107295718B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710550826.9A Active CN107295718B (en) | 2017-07-07 | 2017-07-07 | Balanced synchronous driving circuit for realizing high-power LED illumination |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111385941A (en) * | 2018-12-26 | 2020-07-07 | 松下知识产权经营株式会社 | Lighting control system and lighting system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527501A (en) * | 2008-03-07 | 2009-09-09 | 艾默生网络能源系统有限公司 | Parallel power conversion device |
| CN102802328A (en) * | 2012-09-05 | 2012-11-28 | 英飞特电子（杭州）股份有限公司 | Constant current driver of LED (light emitting diode) light source and LED lamp |
| CN207166819U (en) * | 2017-07-07 | 2018-03-30 | 中山市领航光电科技有限公司 | Realize the balanced synchronous drive circuit of high-power LED illumination |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8786205B2 (en) * | 2011-08-23 | 2014-07-22 | Marvell World Trade Ltd. | Method and apparatus for LED lighting |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527501A (en) * | 2008-03-07 | 2009-09-09 | 艾默生网络能源系统有限公司 | Parallel power conversion device |
| CN102802328A (en) * | 2012-09-05 | 2012-11-28 | 英飞特电子（杭州）股份有限公司 | Constant current driver of LED (light emitting diode) light source and LED lamp |
| CN207166819U (en) * | 2017-07-07 | 2018-03-30 | 中山市领航光电科技有限公司 | Realize the balanced synchronous drive circuit of high-power LED illumination |
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