CN105430792A - LED synchronous rectifying circuit - Google Patents
LED synchronous rectifying circuit Download PDFInfo
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- CN105430792A CN105430792A CN201510809008.7A CN201510809008A CN105430792A CN 105430792 A CN105430792 A CN 105430792A CN 201510809008 A CN201510809008 A CN 201510809008A CN 105430792 A CN105430792 A CN 105430792A
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- circuit
- led
- control circuit
- pulse control
- synchronous rectification
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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
- 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]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention discloses an LED synchronous rectifying circuit, and relates to the field of LED lamps. The LED synchronous rectifying circuit comprises an EMI filter, a rectifying circuit, a converter, an LED circuit and a pulse control circuit, wherein an output end of the EMI filter is connected to the rectifying circuit; an outlet end of the rectifying circuit is separately connected with the converter and the pulse control circuit; the converter is connected in series with the LED circuit; the LED circuit is formed by connecting a plurality of LED lamp banks in series; each LED lamp bank is formed by connecting a plurality of diodes in parallel; and a linear constant-current circuit is connected in series to the tail end of the LED circuit and is connected between the rectifying circuit and the pulse control circuit. According to the LED synchronous rectifying circuit disclosed by the present invention, a current flowing through the LED lamp banks is in a pulse form to control each LED lamp bank to be sequentially conducted for emitting light and turned off, so that the current time of LEDs in unit time can be effectively shortened, heat generated by the LEDs is reduced, efficiency of the LEDs is improved, and the service life of the LEDs is prolonged.
Description
Technical field
The present invention relates to LED field, be specifically related to a kind of LED circuit of synchronous rectification.
Background technology
LED is efficient with it, energy-saving and environmental protection, the life-span is long, high reliability progressively replaces traditional incandescent lamp, fluorescent lamp becomes lighting source of new generation, because LED is a kind of semiconductor device, LED must driving power could be reliable and stable work.At present, LED drive power mainly PWM constant-current driving power supply on market, the electric current flowing through LED is constant direct current.But because the photoelectric conversion efficiency of current LED is also lower, in high-power LED lamp, the caloric value of LED is very large, and temperature is higher.When LED at high temperature works, the decrease in efficiency of LED, the lost of life, in addition, because the caloric value of LED is large, also proposes very high requirement to the heat dissipation design of LED lamp.
Summary of the invention
Problem to be solved by this invention is to provide a kind of LED circuit of synchronous rectification of high efficiency smart.
To achieve these goals, the technical scheme that the present invention takes is a kind of LED circuit of synchronous rectification of providing, comprise electromagnetic interface filter, rectification circuit, transducer, LED circuit and pulse control circuit, the output of described electromagnetic interface filter is connected with rectification circuit, described rectification circuit is made up of MOS field-effect transistor, described MOS field-effect transistor also comprises mutual-inductance element, voltage clipping element and waveform shaping circuit, the port of export of described rectification circuit is connected with transducer and pulse control circuit respectively, described transducer and LED circuit are connected in series, described LED circuit is connected in series by several LED groups, described LED group is connected by several diodes in parallels, the linear constant-current circuit of described LED circuit terminal tandem, described linear constant current circuit is connected between rectification circuit and pulse control circuit.
Preferably, an intelligent control circuit is connected with between described linear constant current circuit and pulse control circuit.
Preferably, described intelligent control circuit comprises main controller module, measurement module and warning device, and described main controller module, measurement module are connected successively with warning device, and described measurement module is connected with pulse control circuit.
Preferably, described measurement module comprises simulation part and digital logic portion, and simulation part and digital logic portion, by light-coupled isolation, realize SPI interface and master controller communication by CPLD.
Preferably, described voltage clipping element is diode clipper.
Preferably, each series lamp group in described LED circuit is connected in parallel to a filter circuit, and described filter circuit is connected with main controller module.
Preferably, described main controller module adopts CortexM3 processor.
The advantage of technical scheme of the present invention is adopted to be, the present invention is a kind of LED circuit of synchronous rectification, the present invention makes the electric current flowing through LED group be impulse form, and adopt the form of multiple LED group parallel connection, control conducting luminescence and the shutoff successively in order of each LED group, effectively can shorten the electric time of unit interval LED, reduce the heat that LED produces, improve the efficiency of LED, extend the life-span of LED, intelligent control circuit to be arranged so that contactor realizes intelligent, more can meet the needs of people, and the setting of filter circuit, the electric current in circuit is made to reach balance, described main controller module adopts CortexM3 processor, overcome the existing battery pack tester degree of modularity so low, measuring accuracy is low, the shortcoming that reliability is low, the Based Intelligent Control to battery pack can be realized.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of LED circuit of synchronous rectification of the present invention.
Fig. 2 is a kind of rectification circuit of LED circuit of synchronous rectification of the present invention and the structural representation of intelligent control circuit.
Wherein: 1-simulates part, 2-digital logic portion.
Embodiment
The following detailed description of the preferred embodiment of the present invention.
A kind of LED circuit of synchronous rectification, comprise electromagnetic interface filter, rectification circuit, transducer, LED circuit and pulse control circuit, the output of described electromagnetic interface filter is connected with rectification circuit, the port of export of described rectification circuit is connected with transducer and pulse control circuit respectively, described transducer and LED circuit are connected in series, described LED circuit is connected in series by several LED groups, described LED group is connected by several diodes in parallels, the linear constant-current circuit of described LED circuit terminal tandem, described linear constant current circuit is connected between rectification circuit and pulse control circuit.
Wherein the effect of electromagnetic interface filter is the frequency signal access arrangement of permission equipment when normally working, and hinder the interference signal of high frequency, the electric current entering circuit is under the effect of rectification circuit, and the alternating current that the voltage exported by ac buck circuit is lower converts unidirectional pulsating nature direct current to.Described rectification circuit is made up of MOS field-effect transistor, for to the conducting of AC input current and shutoff, perform synchronous rectification, described MOS field-effect transistor also comprises mutual-inductance element, voltage clipping element and waveform shaping circuit, described mutual-inductance element is used for the alternating current sampling to input, with the conducting of the MOS field-effect transistor described in current drives and shutoff; Described voltage clipping element is diode clipper, for carrying out amplitude limit to the AC drive voltage of induction, guarantees the work safety of described MOS field-effect transistor.
Electric current after rectification enters transducer, identical voltage is exported under the effect of transducer, enter in LED circuit, identical electric current is exported under the effect of linear constant current circuit, an intelligent control circuit is connected with between described linear constant current circuit and pulse control circuit, described intelligent control circuit comprises main controller module, measurement module and warning device, described main controller module, measurement module is connected successively with warning device, described main controller module adopts CortexM3 processor, overcome the existing battery pack tester degree of modularity so low, measuring accuracy is low, the shortcoming that reliability is low, the Based Intelligent Control to battery pack can be realized, described measurement module is connected with pulse control circuit, described measurement module comprises simulation part 1 and digital logic portion 2, simulation part 1 and Digital Logic 2 part are by light-coupled isolation, SPI interface and master controller communication is realized by CPLD, by to the collection of data and analysis, whether decision circuitry is normal, thus instruction is sent to warning device.In addition, each series lamp group in described LED circuit is connected in parallel to a filter circuit, and described filter circuit is connected with main controller module, makes the electric current in circuit reach balance.
Obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (7)
1. a LED circuit of synchronous rectification, it is characterized in that: comprise electromagnetic interface filter, rectification circuit, transducer, LED circuit and pulse control circuit, the output of described electromagnetic interface filter is connected with rectification circuit, described rectification circuit is made up of MOS field-effect transistor, described MOS field-effect transistor also comprises mutual-inductance element, voltage clipping element and waveform shaping circuit, the port of export of described rectification circuit is connected with transducer and pulse control circuit respectively, described transducer and LED circuit are connected in series, described LED circuit is connected in series by several LED groups, described LED group is connected by several diodes in parallels, the linear constant-current circuit of described LED circuit terminal tandem, described linear constant current circuit is connected between rectification circuit and pulse control circuit.
2. a kind of LED circuit of synchronous rectification according to claim 1, is characterized in that, is connected with an intelligent control circuit between described linear constant current circuit and pulse control circuit.
3. a kind of LED circuit of synchronous rectification according to claim 2, it is characterized in that, described intelligent control circuit comprises main controller module, measurement module and warning device, described main controller module, measurement module are connected successively with warning device, and described measurement module is connected with pulse control circuit.
4. a kind of LED circuit of synchronous rectification according to claim 3, is characterized in that, described measurement module comprises simulation part and digital logic portion, and simulation part and digital logic portion, by light-coupled isolation, realize SPI interface and master controller communication by CPLD.
5. a kind of LED circuit of synchronous rectification according to claim 1, is characterized in that, described voltage clipping element is diode clipper.
6. a kind of LED circuit of synchronous rectification according to claim 1, is characterized in that, each series lamp group in described LED circuit is connected in parallel to a filter circuit, and described filter circuit is connected with main controller module.
7. a kind of LED circuit of synchronous rectification according to claim 1, is characterized in that, described main controller module adopts CortexM3 processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510809008.7A CN105430792A (en) | 2015-11-20 | 2015-11-20 | LED synchronous rectifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510809008.7A CN105430792A (en) | 2015-11-20 | 2015-11-20 | LED synchronous rectifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105430792A true CN105430792A (en) | 2016-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510809008.7A Pending CN105430792A (en) | 2015-11-20 | 2015-11-20 | LED synchronous rectifying circuit |
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| CN (1) | CN105430792A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897436A (en) * | 2006-06-27 | 2007-01-17 | 肖俊承 | Current-driven synchronized communtating circuit |
| CN201042092Y (en) * | 2007-05-17 | 2008-03-26 | 陈文良 | Efficient multi-channel LED equable current control circuit |
| CN201742596U (en) * | 2010-05-06 | 2011-02-09 | 陕西科技大学 | Scanning impulse type LED driving power supply |
| CN102570833A (en) * | 2012-02-03 | 2012-07-11 | 华为技术有限公司 | Control circuit, method and converter for synchronous rectification |
| US20140320033A1 (en) * | 2011-05-10 | 2014-10-30 | Lutron Electronics Co., Inc. | Dimmable screw-in compact fluorescent lamp having integral electronic ballast circuit |
| CN204080883U (en) * | 2014-09-27 | 2015-01-07 | 上海岩联工程技术有限公司 | A kind of intelligent wireless Large strain sensor |
-
2015
- 2015-11-20 CN CN201510809008.7A patent/CN105430792A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897436A (en) * | 2006-06-27 | 2007-01-17 | 肖俊承 | Current-driven synchronized communtating circuit |
| CN201042092Y (en) * | 2007-05-17 | 2008-03-26 | 陈文良 | Efficient multi-channel LED equable current control circuit |
| CN201742596U (en) * | 2010-05-06 | 2011-02-09 | 陕西科技大学 | Scanning impulse type LED driving power supply |
| US20140320033A1 (en) * | 2011-05-10 | 2014-10-30 | Lutron Electronics Co., Inc. | Dimmable screw-in compact fluorescent lamp having integral electronic ballast circuit |
| CN102570833A (en) * | 2012-02-03 | 2012-07-11 | 华为技术有限公司 | Control circuit, method and converter for synchronous rectification |
| CN204080883U (en) * | 2014-09-27 | 2015-01-07 | 上海岩联工程技术有限公司 | A kind of intelligent wireless Large strain sensor |
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Application publication date: 20160323 |
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| RJ01 | Rejection of invention patent application after publication |