CN104684227B - LED intelligent dimming drive circuit - Google Patents
LED intelligent dimming drive circuit Download PDFInfo
- Publication number
- CN104684227B CN104684227B CN201510136856.6A CN201510136856A CN104684227B CN 104684227 B CN104684227 B CN 104684227B CN 201510136856 A CN201510136856 A CN 201510136856A CN 104684227 B CN104684227 B CN 104684227B
- Authority
- CN
- China
- Prior art keywords
- converter
- voltage
- control signal
- control unit
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
An LED intelligent dimming drive circuit comprises an AC/DC rectifying module, an MCU control unit, a DC/DC converter and an LED light source, wherein the AC/DC rectifying module is connected with the DC/DC converter, the output end of the DC/DC converter is connected with the LED light source, the AC/DC rectifying module comprises a controller, the MCU control unit is connected with the DC/DC converter, the MCU control unit is also connected with the controller, the MCU control unit comprises a voltage detector which is used for detecting the voltage 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, and the controller adjusts the voltage output to the DC/DC converter by the AC/DC rectifying module according to the control signal, the invention ensures that the output voltage of the AC/DC rectifying module changes along with the change of the voltage at the two ends of the DC/DC converter, and the difference value of the output voltage and the voltage is kept within a small preset value, thereby ensuring the high efficiency of the driver.
Description
Technical field
The present invention relates to a kind of LED illumination lamp control circuit, especially a kind of LED intelligent dimming driving circuit.
Background technique
The development and the improvement of people's living standards of technology, in lighting area, due to LED light source have luminous efficiency it is high,
Low fever, power saving and service life long advantage, therefore it is using more and more extensive.With the continuous development of LED technology, LED drives
Circuit is also more and more, is broadly divided into three kinds: the driving of resistance current limliting, constant current driving and constant pressure driving.It is often when due to using
Single drive mode poor regulation performance, color fidelity effect difference will occurs or adjust the problems such as difficult.Such as authorized announcement date
On September 15th, 2010, Chinese Patent Application No. 200920261721.2, the utility model of entitled " LED drive circuit ", packet
Include filter circuit, current rectifying and wave filtering circuit, the pwm control circuit with PFC correction, switch transformer, power switch, output rectification filter
Wave circuit and loop control circuit form the compensation of Voltage loop by the pwm control circuit and loop control circuit that correct with PFC
Network realizes the negative-feedback of output voltage to a certain extent, but only be used only level-one driving Isobarically Control, be difficult protect compared with
The constant pressure of small error, therefore, so that the efficiency of driver is lower.
Summary of the invention
In view of this, the LED intelligent dimming driving circuit that it is necessary to provide a kind of structures is simple, drive efficiency is high.
A kind of LED intelligent dimming driving circuit, including AC/DC rectification module, MCU control unit, DC/DC converter and
LED light source, the AC/DC rectification module are connect with the DC/DC converter, and the output end of the DC/DC converter and the LED light source connect
It connects, which includes controller, which connect with the DC/DC converter, and the MCU control unit is also
It is connect with the controller, includes voltage detector in the MCU control unit, the voltage detector is for detecting DC/DC transformation
The voltage at device both ends, after the voltage detector detects the voltage at the DC/DC converter both ends more than predetermined value, MCU control
Unit processed to the controller issue control signal, the controller according to the control signal adjust the AC/DC rectification module export to
The voltage of the DC/DC converter, so that it is guaranteed that the voltage at the DC/DC converter both ends is within predetermined value.
Compared with prior art, LED intelligent dimming driving circuit is used for real-time detection DC/ by setting voltage detection module
The voltage at DC converter both ends is simultaneously compared output control signal after conversion, control signal feedback to controller, controller
The output voltage of AC/DC rectification module is adjusted according to the control signal.So that the output voltage of AC/DC rectification module is with this
The variation of the voltage at DC/DC converter both ends and change, the difference of the two is constant within the predetermined value of a very little, guarantee
The high efficiency of driver.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the LED intelligent dimming driving circuit of first embodiment of the invention.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
The LED intelligent dimming driving circuit 100 of first embodiment of the invention, please refers to Fig. 1.
Referring to FIG. 1, the LED intelligent dimming driving circuit 100 mainly includes AC/DC rectification module 10, MCU control unit
40, DC/DC converter 20 and LED light source 30.The AC/DC rectification module 10 is connect with the DC/DC converter 20, the DC/DC
The output end of converter 20 is connect with the LED light source 30, which includes controller, the MCU control unit 40
It is connect with the DC/DC converter 20, which also connect with the controller, includes electricity in the MCU control unit 40
Detector is pressed, which is used to detect the voltage at 20 both ends of DC/DC converter, when the voltage detector detects this
For the voltage at 20 both ends of DC/DC converter more than after predetermined value, which issues control signal 50 to the controller,
The controller adjusts the AC/DC rectification module 10 output to the voltage of the DC/DC converter 20 according to the control signal 50, thus
Ensure the voltage at 20 both ends of DC/DC converter within predetermined value.
The range of the predetermined value of the voltage at 20 both ends of DC/DC converter is 1V-3V.The setting of the predetermined value is to incite somebody to action
The limiting voltage at 20 both ends of DC/DC converter improves the working efficiency of circuit entirety in smaller range.Voltage inspection
It is in parallel with the DC/DC converter 20 to survey device.Including multiple LED light sources 30, the LED light source is connected in DC/DC transformation in parallel
The output end of device 20.
The AC/DC rectification module 10 further includes transformer winding, which is connected to the transformer winding
On secondary windings.
The controller, according to the first PWM dimming control signal, adjusts AC/ for generating the first PWM dimming control signal
The duty ratio of the output electric current of DC rectification module 10, to realize to these 30 brightness of LED light source or the adjusting of other parameters.It should
MCU control unit 40 is for generating the 2nd PWM dimming control signal.2nd PWM dimming control signal is the MCU control unit
40 pass through the generated signal that converts according to the voltage at detected 20 both ends of DC/DC converter.2nd PWM dim signal
The LED light source 30 will be directly fed as electric current.
The MCU control unit 40 generates the 3rd PWM dimming control signal according to the testing result of the voltage detector and will
3rd PWM dimming control signal, which exports, gives the controller.The controller is according to the 3rd PWM dimming control signal and predetermined value
After conversion, the first PWM dimming control signal is generated.
Control is believed due to the voltage at the voltage detector real-time detection 20 both ends of DC/DC converter, and in real time
Numbers 50 feed back to AC/DC rectification module 10, therefore AC/DC rectification module 10 can adjust output voltage in real time, to guarantee
The difference of AC/DC rectification module 10 output voltage and load voltage is constant, so that driver has high efficiency.When work, such as
Fruit user needs to reduce the brightness of the LED light source 30, then can change the first PWM light modulation control by remote controler or switch etc.
Signal processed.In this way, the voltage at 20 both ends of DC/DC converter will accordingly change.The voltage detector detects this
Change and signal is passed into the controller by the MCU control unit 40.To realize entire circuit to DC/DC converter 20
The real-time response of the voltage at both ends.
In conclusion the LED intelligent dimming driving circuit 100 is used for real-time detection DC/ by setting voltage detection module
The voltage at 20 both ends of DC converter is simultaneously compared output control signal 50 after conversion, and the control signal 50 feedback arrives controller,
Controller adjusts the output voltage of AC/DC rectification module 10 according to the control signal.So that the output electricity of AC/DC rectification module 10
Pressure changes as the load voltage of LED light source 30 changes, so that the load voltage of LED light source 30 and AC/DC rectification module 10
Output voltage the constant value in a very little of difference, ensure that the high efficiency of driver.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (6)
1. a kind of LED intelligent dimming driving circuit, including AC/DC rectification module, MCU control unit, DC/DC converter and
LED light source, the AC/DC rectification module are connect with the DC/DC converter, and the output end of the DC/DC converter and the LED light source connect
It connects, which includes controller, which connect with the DC/DC converter, which is characterized in that should
MCU control unit is also connect with the controller, includes voltage detector in the MCU control unit, the voltage detector is for examining
The voltage for surveying the DC/DC converter both ends, when the voltage detector detects that the voltage at the DC/DC converter both ends is more than predetermined
After value, which issues control signal to the controller, and it is whole which according to the control signal adjusts the AC/DC
Flow module is exported to the voltage of the DC/DC converter, so that it is guaranteed that the voltage at the DC/DC converter both ends is within predetermined value；
The controller is for generating the first PWM dimming control signal, and the MCU control unit is for generating the 2nd PWM dimming control signal；
The controller adjusts the duty ratio of the output electric current of AC/DC rectification module according to the first PWM dimming control signal；This second
PWM dimming control signal is produced according to the voltage at detected DC/DC converter both ends by conversion by the MCU control unit
Raw signal；2nd PWM dim signal will directly feed the LED light source as electric current.
2. LED intelligent dimming driving circuit according to claim 1, which is characterized in that the voltage detector and the DC/DC
Converter is in parallel.
3. LED intelligent dimming driving circuit according to claim 1, which is characterized in that the electricity at the DC/DC converter both ends
The range of the predetermined value of pressure is 1V-3V.
4. LED intelligent dimming driving circuit according to claim 1, which is characterized in that the AC/DC rectification module further includes
Transformer winding, the DC/DC converter are connected on the secondary windings of the transformer winding.
5. LED intelligent dimming driving circuit according to claim 1, which is characterized in that the MCU control unit is according to the electricity
The testing result of pressure detector, which generates the 3rd PWM dimming control signal and exports the 3rd PWM dimming control signal, gives the control
Device processed.
6. LED intelligent dimming driving circuit according to claim 1, which is characterized in that described including multiple LED light sources
LED light source is connected in the output end of the 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 drive 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 drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104684227A CN104684227A (en) | 2015-06-03 |
| CN104684227B true CN104684227B (en) | 2019-05-17 |
Family
ID=53318641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510136856.6A Active CN104684227B (en) | 2015-03-27 | 2015-03-27 | LED intelligent dimming drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104684227B (en) |
Families Citing this family (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 |
| WO2022032632A1 (en) * | 2020-08-14 | 2022-02-17 | Tridonic Gmbh & Co Kg | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104684227A (en) | 2015-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103442501B (en) | Forced constant flow source dimming LED (Light Emitting Diode) lamp | |
| CN201839477U (en) | LED drive circuit and lamp | |
| KR101111387B1 (en) | Power integrated circuit for LED lighting | |
| US9572209B2 (en) | LED actuating device and method | |
| CN201663735U (en) | LED power supply | |
| CN102458014A (en) | Light source control method, device and system | |
| CN105491713A (en) | High-power LED street lamp drive circuit | |
| CN205793540U (en) | The three-in-one light adjusting circuit of LED in lamp control system | |
| CN104684227B (en) | LED intelligent dimming drive circuit | |
| CN203181303U (en) | Light modulator used for voltage drop dimming light fixture | |
| CN108156691B (en) | Non-point light source non-stroboscopic light modulation circuit | |
| CN204482105U (en) | LED intelligent dimming drive circuit | |
| CN201298809Y (en) | Energy-saving LED switching power supply | |
| CN203120255U (en) | LED control system circuit for primary-side sampling | |
| TWI477189B (en) | Light emitting diode dimming apparatus | |
| CN201967185U (en) | Light source control device and system | |
| Cardesín et al. | Low cost intelligent LED driver for public Lighting Smart Grids | |
| US10701779B2 (en) | Drive device for illuminating device, illumination device, lighting system and method for controlling the lighting system | |
| CN103228083A (en) | Intelligent dimming LED driving power supply | |
| CN204634112U (en) | The power circuit of many LED bulb | |
| CN202503696U (en) | A dimming system for LED lamps | |
| KR20110035837A (en) | Dimmer for light emitting device | |
| CN201667743U (en) | Light source driving device with adjustable light | |
| CN215187501U (en) | Human body induction LED driving power supply based on NFC parameter configuration | |
| CN104470039B (en) | A kind of LED driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
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. |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |