CN105934045A - Single-ended flyback constant current circuit for light-emitting diode (LED) - Google Patents
Single-ended flyback constant current circuit for light-emitting diode (LED) Download PDFInfo
- Publication number
- CN105934045A CN105934045A CN201610524655.8A CN201610524655A CN105934045A CN 105934045 A CN105934045 A CN 105934045A CN 201610524655 A CN201610524655 A CN 201610524655A CN 105934045 A CN105934045 A CN 105934045A
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- China
- Prior art keywords
- circuit
- current
- constant
- led
- constant current
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Classifications
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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
-
- 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 provides a single-ended flyback constant current circuit for a light-emitting diode (LED). The constant current circuit includes an electromagnetic compatibility (EMC) and surge current suppression circuit, a rectifier filter circuit, a single-ended flyback DC/DC power converter, and a constant current constant voltage output circuit. Through adoption of the single-ended flyback constant current circuit for the LED, an adjustment service life of the LED lamp can be prolonged effectively, further, an adjustment accuracy of the LED is greatly improved, and fine adjustments such as lamp brightness adjustment can be carried out in a smaller range.
Description
Technical field
The present invention relates to circuit field, a kind of single-ended reverse exciting Constant Electric Current for LED
Road.
Background technology
Along with developing rapidly of illuminating industry, the security performance of illumination is required more and more higher, shines
Bright electrical equipment belongs to state compulsion safety certification product.
According to the present situation of current illuminating industry, enterprise to find new profit growth point to be necessary for building
Found the technical research mechanism of oneself, enhance the capability of independent innovation, make great efforts exploitation new technique, newly illuminate
Product squeezes into domestic and international middle and high level market.On the one hand, strengthen working in concert with the world.The world
Lighting industry has had the history of several more than ten years, have accumulated technology and the managerial experiences of countless maturation,
If we introduce and digest and assimilate external advanced technology, management mode and abundant vehicle also
Strengthen and the working in concert of industries, universities and research institutors' every aspect in the world, so realize integrated innovation by
Step makes China's illumination independent brand.
On the other hand, the national project of Key of Implementation lighting engineering, change pillar industry and lack core
The pillar village hollowing present situation of heart technology, and the statutory standard of oneself is proposed.Finally, country is in science and technology
Set up special project for lighting engineering in the works, support the self-built study base of enterprise and give people, wealth,
The supporting or build industries, universities and research institutors base jointly with the mechanism such as university, institute of thing.
Although China's illumination technique and equipment development have had suitable development, luminaire large-scale
Change and localization is the most ripe, but the general technical level of China's illumination is still deposited compared with abroad
In certain gap.
Currently, Lighting Industry development urgent need solves the technical problem that it is stable, energy-conservation, simple,
Consumption reduction, environmental protection, improve total quality and raise labour productivity, walking the road of sustainable development.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of single-ended reverse exciting for LED
Constant-current circuit.
The present invention solves that the technical scheme that above-mentioned technical problem uses is:
A kind of single-ended reverse exciting constant-current circuit for LED, described constant-current circuit includes: EMC
With surge current suppression circuit, current rectifying and wave filtering circuit, single-ended flyback DC/DC power inverter
And constant current, constant voltage outputting circuit, two electrodes of constant current, constant voltage outputting circuit and LED array
Connect respectively, between constant current, constant voltage outputting circuit and single-ended flyback DC/DC power inverter
Connect and have signal acquisition circuit and protection circuit, the voltage pulsation letter of the extraction of signal acquisition circuit
Control the output of single-ended flyback DC/DC power inverter number after protection circuit, make constant current, perseverance
The voltage and current that voltage follower circuit output is stable；Protection circuit uses current control mode
PWM/PFM generator；Described single-ended flyback DC/DC power inverter be wide dynamic range every
Release, it includes the mu balanced circuit that stabilivolt and diode are constituted, transformator and peripheral circuit,
By transformator and peripheral circuit, the high pressure low frequency of primary is converted into low-voltage high-frequency.
Further, the outfan of described current rectifying and wave filtering circuit connects with the in-phase end of transformer coil
It is connected to electric capacity C4.
The invention have the benefit that
By the invention it is possible to effectively promote the regulation life-span of LED, it is greatly promoted simultaneously
The degree of regulation of LED, can carry out more careful lamplight brightness etc. in less scope
Regulation.
Invention introduces voltage or Current Feedback Control link.User can change as required
Load LED array form and LED number, obtain different outputs.This driving electricity simultaneously
Road also overcomes because of input voltage, the factor such as ambient temperature and the color easily variation etc. of LED lamplight
Drawback, power factor reaches more than 0.9, and THD can accomplish less than 20%, and the life-span can reach 50000
More than hour, the most also can complete the dimming function from 100% to 1%, and these series of products
It is also equipped with overvoltage and overcurrent protection function.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of a kind of detailed description of the invention of the present invention.
Detailed description of the invention
The present invention is further elaborated below in conjunction with the accompanying drawings.
Refer to Fig. 1, a kind of single-ended reverse exciting constant-current circuit for LED, include: EMC
With surge current suppression circuit, current rectifying and wave filtering circuit, single-ended flyback DC/DC power inverter,
And constant current, constant voltage outputting circuit, constant current, constant voltage outputting circuit connect with two electrodes of LED array
Connecing, connecting between constant current, constant voltage outputting circuit and single-ended flyback DC/DC power inverter has
Signal acquisition circuit and protection circuit, the voltage fluctuation signal of the extraction of signal acquisition circuit is through protecting
Control the output of single-ended flyback DC/DC power inverter after protection circuit, make constant current, constant voltage output
The voltage and current that circuit output is stable；Protection circuit uses current control mode PWM/PFM to send out
Raw device；Described single-ended flyback DC/DC power inverter is wide dynamic range isolated form, its bag
Include the mu balanced circuit that stabilivolt and diode are constituted, transformator and peripheral circuit, by transformator and
The high pressure low frequency of primary is converted into low-voltage high-frequency by peripheral circuit, the secondary bag of transformator
Including two groups, one group rectified and filtering is supplied to load LED array, and another group is voltage sample
Outfan, voltage sample outfan and IN4148/ES1D, ZMM5243B-7 and electric capacity C9 structure
Become signal acquisition circuit.
Voltage sample outfan one end through IN4148/ES1D and electric capacity C9 to negative supply, another
End directly arrives negative supply, the output end of pressure-stabilizing of IN4148/ES1D and the positive pole of electrochemical capacitor C9
End connects, and it connects end and is input to the control end C of TOP245 after ZMM5243B-7 and resistance,
Fed back to the control end C of TOP245 by the outfan of voltage sample coil, TOP245 adjust
The frequency of oscillation of joint transformator, is less than between control end C and the negative supply of described TOP245
The resistance of 10 Ω and the electrochemical capacitor of concatenation, the outfan of described current rectifying and wave filtering circuit and transformator
First group of coil in-phase end connect have electric capacity C4.
By the invention it is possible to effectively promote the regulation life-span of LED, it is greatly promoted simultaneously
The degree of regulation of LED, can carry out more careful lamplight brightness etc. in less scope
Regulation.Invention introduces voltage or Current Feedback Control link.User can change as required
Varying load LED array form and LED number, obtain different outputs.This driving simultaneously
Circuit also overcomes because of input voltage, and the factor such as ambient temperature and the color of LED lamplight easily change
Etc. drawback, power factor reaches more than 0.9, and THD can accomplish less than 20%, and the life-span can reach
More than 50000 hours, the most also can complete the dimming function from 100% to 1%, and this is
Row product is also equipped with overvoltage and overcurrent protection function.
Claims (2)
1. the single-ended reverse exciting constant-current circuit for LED, it is characterised in that: described Constant Electric Current
Road includes: EMC and surge current suppression circuit, current rectifying and wave filtering circuit, single-ended flyback
DC/DC power inverter and constant current, constant voltage outputting circuit, constant current, constant voltage outputting circuit with
Two electrodes of LED array connect respectively, constant current, constant voltage outputting circuit and single-ended flyback DC/DC
Connect between power inverter and have signal acquisition circuit and protection circuit, carrying of signal acquisition circuit
The voltage fluctuation signal taken controls single-ended flyback DC/DC power inverter after protection circuit
Output, makes the voltage and current that constant current, constant voltage outputting circuit output are stable；Protection circuit uses
Current control mode PWM/PFM generator；Described single-ended flyback DC/DC power inverter is
Wide dynamic range isolated form, it includes the mu balanced circuit that stabilivolt and diode are constituted, transformator
And peripheral circuit, transformator and peripheral circuit the high pressure low frequency of primary is converted into
Low-voltage high-frequency.
A kind of single-ended reverse exciting constant-current circuit for LED, it is special
Levy and be: the outfan of described current rectifying and wave filtering circuit is connected with the in-phase end of transformer coil electricity
Hold C4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524655.8A CN105934045A (en) | 2016-07-01 | 2016-07-01 | Single-ended flyback constant current circuit for light-emitting diode (LED) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524655.8A CN105934045A (en) | 2016-07-01 | 2016-07-01 | Single-ended flyback constant current circuit for light-emitting diode (LED) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105934045A true CN105934045A (en) | 2016-09-07 |
Family
ID=56827043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610524655.8A Pending CN105934045A (en) | 2016-07-01 | 2016-07-01 | Single-ended flyback constant current circuit for light-emitting diode (LED) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105934045A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112566320A (en) * | 2020-12-22 | 2021-03-26 | 安徽亮亮电子科技有限公司 | Method for realizing high power factor and low stroboflash |
| CN114554647A (en) * | 2022-03-16 | 2022-05-27 | 无锡英迪芯微电子科技股份有限公司 | PWM generation method and circuit suitable for driving matrix type LED headlamp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1919261A1 (en) * | 2006-10-30 | 2008-05-07 | Alcatel Lucent | Low frequency, constant current control circuit for power leds |
| CN101841960A (en) * | 2010-05-06 | 2010-09-22 | 宁波市鄞州龙源照明电器有限公司 | Controllable LED load current driving circuit |
| CN201682670U (en) * | 2010-05-06 | 2010-12-22 | 宁波市鄞州龙源照明电器有限公司 | Controllable LED load current driving device |
| CN205847667U (en) * | 2016-07-01 | 2016-12-28 | 安徽亮亮电子科技有限公司 | A kind of single-ended reverse exciting constant-current circuit for LED |
-
2016
- 2016-07-01 CN CN201610524655.8A patent/CN105934045A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1919261A1 (en) * | 2006-10-30 | 2008-05-07 | Alcatel Lucent | Low frequency, constant current control circuit for power leds |
| CN101841960A (en) * | 2010-05-06 | 2010-09-22 | 宁波市鄞州龙源照明电器有限公司 | Controllable LED load current driving circuit |
| CN201682670U (en) * | 2010-05-06 | 2010-12-22 | 宁波市鄞州龙源照明电器有限公司 | Controllable LED load current driving device |
| CN205847667U (en) * | 2016-07-01 | 2016-12-28 | 安徽亮亮电子科技有限公司 | A kind of single-ended reverse exciting constant-current circuit for LED |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112566320A (en) * | 2020-12-22 | 2021-03-26 | 安徽亮亮电子科技有限公司 | Method for realizing high power factor and low stroboflash |
| CN114554647A (en) * | 2022-03-16 | 2022-05-27 | 无锡英迪芯微电子科技股份有限公司 | PWM generation method and circuit suitable for driving matrix type LED headlamp |
| CN114554647B (en) * | 2022-03-16 | 2023-07-25 | 无锡英迪芯微电子科技股份有限公司 | PWM (pulse-Width modulation) generation method and circuit suitable for matrix LED headlight driving |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160907 |
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| RJ01 | Rejection of invention patent application after publication |