CN104684227A - LED intelligent light adjustment driving circuit - Google Patents
LED intelligent light adjustment driving circuit Download PDFInfo
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- CN104684227A CN104684227A CN201510136856.6A CN201510136856A CN104684227A CN 104684227 A CN104684227 A CN 104684227A CN 201510136856 A CN201510136856 A CN 201510136856A CN 104684227 A CN104684227 A CN 104684227A
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention provides an LED intelligent light adjustment driving circuit, which comprises an AC/DC rectification module, an MCU control unit, a DC/DC converter and an LED light source, wherein the AC/DC rectification module and the DC/DC converter are connected, an output end of the DC/DC converter is connected with the LED light source, the AC/DC rectification module consists of a controller, the MCU control unit is connected with the DC/DC converter and is also connected with the controller, the MCU control unit consists of a voltage detector which is used for detecting voltages at two ends of the DC/DC converter, when the voltage detector detects that the voltage at two ends of the DC/DC converter exceeds a preset value, the MCU control unit sends a control signal to the controller, the controller adjusts the voltage output to the DC/DC converter from the AC/DC rectification module according to the control signal. By adopting the LED intelligent light adjustment driving circuit, the output voltage of the AC/DC rectification module is changed along with the voltage at two ends of the DC/DC converter, and the difference of the two is constant within a small preset value, so that the high efficiency of a driver can be guaranteed.
Description
Technical field
The present invention relates to a kind of LED illumination lamp control circuit, particularly a kind of LED intelligent dimming drive circuit.
Background technology
The development of technology and the raising of people's living standard, in lighting field, because LED light source has the high and low heating of luminous efficiency, power saving and life-span long advantage, therefore its application is more and more extensive.Along with the development of LED technology, LED drive circuit also gets more and more, and is broadly divided into three kinds: the driving of resistance current limliting, constant current driving and constant voltage drive.Be often single drive pattern during owing to using, just there will be adjusting function difference, color fidelity weak effect or regulate the problems such as difficulty.As authorized announcement date on September 15th, 2010, Chinese Patent Application No. 200920261721.2, name is called the utility model of " LED drive circuit ", it comprises filter circuit, current rectifying and wave filtering circuit, with the pwm control circuit that PFC corrects, switch transformer, power switch, output rectifier and filter and loop control circuit, the pwm control circuit corrected by band PFC and the compensating network of loop control circuit coating-forming voltage ring, achieve the negative feedback of output voltage to a certain extent, but only use the Isobarically Control that one-level drives, the constant voltage of the less error of very difficult guarantor, therefore, make the efficiency of driver lower.
Summary of the invention
In view of this, be necessary to provide the LED intelligent dimming drive circuit that a kind of structure is simple, drive efficiency is high.
A kind of LED intelligent dimming drive circuit, comprise AC/DC rectification module, MCU control unit, DC/DC converter and LED light source, this AC/DC rectification module is connected with this DC/DC converter, the output of this DC/DC converter is connected with this LED light source, this AC/DC rectification module comprises controller, this MCU control unit is connected with this DC/DC converter, this MCU control unit is also connected with this controller, this MCU control unit comprises voltage detector, this voltage detector is for detecting the voltage at these DC/DC converter two ends, after this voltage detector detects that the voltage at these DC/DC converter two ends exceedes predetermined value, this MCU control unit sends control signal to this controller, this controller adjusts according to this control signal the voltage that this AC/DC rectification module exports to this DC/DC converter, thus guarantee that the voltage at these DC/DC converter two ends is within predetermined value.
Compared with prior art, LED intelligent dimming drive circuit is by arranging voltage detection module for detecting the voltage at DC/DC converter two ends in real time and exporting control signal after comparing conversion, this control signal feeds back to controller, and controller is according to the output voltage of this control signal adjustment AC/DC rectification module.The output voltage of AC/DC rectification module is changed along with the change of the voltage at these DC/DC converter two ends, by constant for the difference of the two within a very little predetermined value, ensure that the high efficiency of driver.
Accompanying drawing explanation
Fig. 1 is the structural representation of the LED intelligent dimming drive circuit of first embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
The LED intelligent dimming drive circuit 100 of first embodiment of the invention, please refer to Fig. 1.
Please refer to Fig. 1, this LED intelligent dimming drive circuit 100 mainly comprises AC/DC rectification module 10, MCU control unit 40, DC/DC converter 20 and LED light source 30.This AC/DC rectification module 10 is connected with this DC/DC converter 20, the output of this DC/DC converter 20 is connected with this LED light source 30, this AC/DC rectification module 10 comprises controller, this MCU control unit 40 is connected with this DC/DC converter 20, this MCU control unit 40 is also connected with this controller, this MCU control unit 40 comprises voltage detector, this voltage detector is for detecting the voltage at these DC/DC converter 20 two ends, after this voltage detector detects that the voltage at these DC/DC converter 20 two ends exceedes predetermined value, this MCU control unit 40 sends control signal 50 to this controller, this controller adjusts according to this control signal 50 voltage that this AC/DC rectification module 10 exports to this DC/DC converter 20, thus guarantee that the voltage at these DC/DC converter 20 two ends is within predetermined value.
The scope of the predetermined value of the voltage at these DC/DC converter 20 two ends is 1V-3V.The setting of this predetermined value be in order to by the limiting voltage at these DC/DC converter 20 two ends in smaller scope, improve the operating efficiency of circuit integrity.This voltage detector is in parallel with this DC/DC converter 20.Comprise multiple LED light source 30, described LED light source is connected in the output of this DC/DC converter 20 in parallel.
This AC/DC rectification module 10 also comprises Transformer Winding, and this DC/DC converter 20 is connected on the secondary winding of this Transformer Winding.
This controller, for generation of a PWM dimming control signal, according to a PWM dimming control signal, adjusts the duty ratio of the output current of AC/DC rectification module 10, thus realizes the adjustment to these LED light source 30 brightness or other parameters.This MCU control unit 40 is for generation of the 2nd PWM dimming control signal.The signal that 2nd PWM dimming control signal produces through conversion according to the voltage at detected DC/DC converter 20 two ends for this MCU control unit 40.2nd PWM dim signal directly will supply this LED light source 30 as electric current.
This MCU control unit 40 produces the 3rd PWM dimming control signal according to the testing result of this voltage detector and the 3rd PWM dimming control signal is exported to this controller.After this controller converts according to the 3rd PWM dimming control signal and predetermined value, produce a PWM dimming control signal.
Because this voltage detector detects the voltage at these DC/DC converter 20 two ends in real time, and real-time feeds back to AC/DC rectification module 10 by control signal 50, therefore the adjustment output voltage that AC/DC rectification module 10 can be real-time, thus ensure that the difference of AC/DC rectification module 10 output voltage and load voltage is constant, make driver have high efficiency.During work, if user needs the brightness reducing this LED light source 30, then can change a PWM dimming control signal by remote controller or switch etc.Like this, the voltage at these DC/DC converter 20 two ends will correspondingly change.This voltage detector detects this change and signal is passed to this controller by this MCU control unit 40.Thus realize the real-time response of whole circuit to the voltage at DC/DC converter 20 two ends.
In sum, this LED intelligent dimming drive circuit 100 is by arranging voltage detection module for detecting the voltage at DC/DC converter 20 two ends in real time and comparing the rear output control signal 50 that converts, this control signal 50 feeds back to controller, and controller is according to the output voltage of this control signal adjustment AC/DC rectification module 10.The output voltage of AC/DC rectification module 10 is changed along with the load voltage change of LED light source 30, make the difference of the output voltage of the load voltage of LED light source 30 and AC/DC rectification module 10 constant in a very little value, ensure that the high efficiency of driver.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (7)
1. a LED intelligent dimming drive circuit, comprise AC/DC rectification module, MCU control unit, DC/DC converter and LED light source, this AC/DC rectification module is connected with this DC/DC converter, the output of this DC/DC converter is connected with this LED light source, this AC/DC rectification module comprises controller, this MCU control unit is connected with this DC/DC converter, it is characterized in that, this MCU control unit is also connected with this controller, this MCU control unit comprises voltage detector, this voltage detector is for detecting the voltage at these DC/DC converter two ends, after this voltage detector detects that the voltage at these DC/DC converter two ends exceedes predetermined value, this MCU control unit sends control signal to this controller, this controller adjusts according to this control signal the voltage that this AC/DC rectification module exports to this DC/DC converter, thus guarantee that the voltage at these DC/DC converter two ends is within predetermined value.
2. LED intelligent dimming drive circuit according to claim 1, is characterized in that, this voltage detector is in parallel with this DC/DC converter.
3. LED intelligent dimming drive circuit according to claim 1, is characterized in that, the scope of the predetermined value of the voltage at these DC/DC converter two ends is 1V-3V.
4. LED intelligent dimming drive circuit according to claim 1, is characterized in that, this AC/DC rectification module also comprises Transformer Winding, and this DC/DC converter is connected on the secondary winding of this Transformer Winding.
5. LED intelligent dimming drive circuit according to claim 1, is characterized in that, this controller is for generation of a PWM dimming control signal, and this MCU control unit is for generation of the 2nd PWM dimming control signal.
6. LED intelligent dimming drive circuit according to claim 5, is characterized in that, this MCU control unit produces the 3rd PWM dimming control signal according to the testing result of this voltage detector and the 3rd PWM dimming control signal is exported to this controller.
7. LED intelligent dimming drive circuit according to claim 1, is characterized in that, comprise multiple LED light source, described LED light source is connected in the output of this DC/DC converter in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510136856.6A CN104684227B (en) | 2015-03-27 | 2015-03-27 | LED intelligent dimming driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510136856.6A CN104684227B (en) | 2015-03-27 | 2015-03-27 | LED intelligent dimming driving circuit |
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| Publication Number | Publication Date |
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| CN104684227A true CN104684227A (en) | 2015-06-03 |
| CN104684227B CN104684227B (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510136856.6A Active CN104684227B (en) | 2015-03-27 | 2015-03-27 | LED intelligent dimming driving circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019100274A1 (en) * | 2017-11-23 | 2019-05-31 | 沈佩军 | Fan527b-based led tunnel lamp driver |
| CN116250376A (en) * | 2020-08-14 | 2023-06-09 | 赤多尼科两合股份有限公司 | Control circuit, LED driver and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201585174U (en) * | 2009-12-18 | 2010-09-15 | 深圳市福瑞康电子有限公司 | Led drive circuit |
| CN103503563A (en) * | 2011-05-06 | 2014-01-08 | 欧司朗有限公司 | Dimmable LED driver and method for controlling same |
| JP2014150010A (en) * | 2013-02-04 | 2014-08-21 | Ichikoh Ind Ltd | Lighting tool drive circuit for vehicle |
| CN204482105U (en) * | 2015-03-27 | 2015-07-15 | 立达信绿色照明股份有限公司 | LED intelligent dimming drive circuit |
-
2015
- 2015-03-27 CN CN201510136856.6A patent/CN104684227B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201585174U (en) * | 2009-12-18 | 2010-09-15 | 深圳市福瑞康电子有限公司 | Led drive circuit |
| CN103503563A (en) * | 2011-05-06 | 2014-01-08 | 欧司朗有限公司 | Dimmable LED driver and method for controlling same |
| JP2014150010A (en) * | 2013-02-04 | 2014-08-21 | Ichikoh Ind Ltd | Lighting tool drive circuit for vehicle |
| CN204482105U (en) * | 2015-03-27 | 2015-07-15 | 立达信绿色照明股份有限公司 | LED intelligent dimming drive circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019100274A1 (en) * | 2017-11-23 | 2019-05-31 | 沈佩军 | Fan527b-based led tunnel lamp driver |
| CN116250376A (en) * | 2020-08-14 | 2023-06-09 | 赤多尼科两合股份有限公司 | Control circuit, LED driver and control method |
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| Publication number | Publication date |
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| CN104684227B (en) | 2019-05-17 |
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Effective date of registration: 20170120 Address after: Xingtai Industrial Park Economic Development Zone, Changtai County, Fujian city of Zhangzhou province 363999 Applicant after: ZHANGZHOU LIDAXIN PHOTOELECTRON TECHNOLOGY CO., LTD. Address before: 363999 Xingda Road, Fujian city of Zhangzhou province Changtai Xingtai County Development Zone Applicant before: Leedarson Green Lighting Co., Ltd. |
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