CN201263227Y - LED constant-current driver with light modulation function - Google Patents
LED constant-current driver with light modulation function Download PDFInfo
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- CN201263227Y CN201263227Y CNU2008200279363U CN200820027936U CN201263227Y CN 201263227 Y CN201263227 Y CN 201263227Y CN U2008200279363 U CNU2008200279363 U CN U2008200279363U CN 200820027936 U CN200820027936 U CN 200820027936U CN 201263227 Y CN201263227 Y CN 201263227Y
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Abstract
The utility model provides an LED constant current drive with the function of adjusting light, which comprises a high-power LED light source, a direct current supply, an anti-reverse circuit, a filter circuit, a PWM control circuit (containing an overpressure and short-circuit protection circuit), and a light-adjusting circuit; the direct current supply is connected with the PWM control circuit and the light-adjusting circuit through the filter circuit and the anti-reverse circuit; the PWM control circuit is connected with the light-adjusting circuit and the high-power LED light source respectively; through the constant current property, impact from intense current on the high-power LED light source is slowed down; through the anti-reverse circuit and the overpressure and short-circuit protection circuit, the safety of the system operation is strengthened and damages caused by operating trouble of the circuit are reduced; through the light-adjusting circuit, working current and power dissipation of the LED light source are lowered when cars are rare and people are few; and the LED constant current drive with the function of adjusting light is especially applicable to an illuminating system with high-power LED as the light source.
Description
Technical field
The utility model belongs to lighting field, particularly a kind of LED constant-flow driver that utilizes the band dimming function of DC power supply.
Background technology
As everyone knows, great power LED is used a key factor that is restricted at lighting field, is exactly high temperature having a strong impact on the led light source life-span.When great power LED is worked under the rated current state, can produce heat, if the junction temperature of LED can not be controlled in the safe range, will quicken its light decay, shorten the useful life of LED.In order to reduce the working temperature of led light source, the conventional at present fado of doing is to adopt to reduce the led drive circuit operating current, its shortcoming be the power supply power supplying efficiency low, can not give full play to efficient, the energy-conservation characteristic of led light source.Simultaneously, will not make led light source also want full power output when car late at night is rare even do not possess the driver of dimming function, the junction temperature of LED can not get control on the one hand, also is a kind of waste to the energy in short supply day by day on the other hand.
Summary of the invention
The purpose of this utility model is the defective at above-mentioned prior art, a kind of LED constant-flow driver with dimming function is provided, and it can improve the power supplying efficiency of led light source, reduces the junction temperature of led light source, reduce the power consumption of led light source, prolong the useful life of led light source.
The technical scheme taked of the utility model is to achieve these goals:
A kind of LED constant-flow driver with dimming function, it comprises DC power supply, filter circuit, reverse-connection preventing circuit, pwm control circuit and the high-power LED light source that connects successively, the reverse-connection preventing circuit output also is connected with the light adjusting circuit input simultaneously, and the light adjusting circuit output then is connected with the pwm control circuit input.
Described DC power supply is DC24V.
Described pwm control circuit is provided with overvoltage and short-circuit protection circuit, and its output circuit has the 1-4 road.
Described high-power LED light source is that the LED that 10～18 power are 1W is composed in series.
The LED constant-flow driver of band dimming function of the present utility model; comprise high-power LED light source, DC power supply, filter circuit, reverse-connection preventing circuit, PWM (pulse width modulation) control circuit (containing short circuit and overvoltage crowbar), light adjusting circuit; DC power supply connects pwm control circuit and light adjusting circuit by filter circuit, reverse-connection preventing circuit, and light adjusting circuit is connected pwm control circuit respectively with high-power LED light source.Wherein, DC power supply (DC24V) is given pwm control circuit and light adjusting circuit power supply through filter circuit, reverse-connection preventing circuit, pwm control circuit provides the electric current of setting for high-power LED light source, from energized, light adjusting circuit picks up counting, timing time is given pwm control circuit to light adjusting circuit output control signal, and pwm control circuit changes sets current value, thereby realizes falling power adjustments.By light adjusting circuit, multi-period, many power work that led light source can be realized, and then reduced the junction temperature of led light source, and prolonged its useful life, reduced system power dissipation, saved the energy.
The beneficial effects of the utility model are: compared with prior art, the constant-current drive circuit that the LED constant-flow driver of the utility model band dimming function has light adjusting circuit and is made up of pwm control circuit, filter circuit and reverse-connection preventing circuit, improved the reliable, stable of the power supplying efficiency of led light source and work, and prolonged useful life of led light source, saved the energy.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Among the figure: 1 DC power supply, 2 filter circuits, 3 reverse-connection preventing circuits, 4PWM control circuit, 5 high-power LED light sources, 6 light adjusting circuits.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to qualification of the present utility model.
Referring to Fig. 1, a kind of LED constant-flow driver with dimming function comprises high-power LED light source 5, DC power supply 1, filter circuit 2, reverse-connection preventing circuit 3, pwm control circuit 4 and light adjusting circuit 6.DC power supply 1 (DC24V) is given pwm control circuit 4 and light adjusting circuit 6 power supplies through filter circuit 2, reverse-connection preventing circuit 3, pwm control circuit 4 provides stable setting electric current for high-power LED light source 5, pick up counting from energising light adjusting circuit 6, timing time is given pwm control circuit 4 to the output control signal, pwm control circuit 4 is exported to high-power LED light source 5 after adjusting and setting electric current, thus the junction temperature of control high-power LED light source 6 and its power consumption of reduction.
Referring to Fig. 2, its circuit is constructed as follows:
DC power supply 1 (storage battery or solar photovoltaic power): DC24V.
Reverse-connection preventing circuit 3 is made up of Schottky diode D01; its operation principle is: electric current forms the closed-loop path through the negative pole that unilateral diode D01 flows back to DC power supply; error-polarity connection of power supply, because of the unidirectional on state characteristic of diode, circuit can not form the loop and be protected.
Constant-current circuit is made up of pwm control circuit 4, light adjusting circuit 6 and high-power LED light source 5, pwm control circuit 4 specifically is made up of following elements: integrated package U1, resistance R 11, R21, R31, R41, R51, R61, R71, R81, R91, R101, R111, R121, R131, R141, capacitor C 51, C61, C71, C81, C91, C101, C111, C121, inductance L 1, diode D11, metal-oxide-semiconductor Q11, Q21, high-power LED light source LED1～LEDn.Wherein R71 is used to be provided with the frequency of oscillation of U1; the switch of metal-oxide-semiconductor Q11 is realized boosting of inductance L 1; drive the high-power LED light source LED1～LEDn of back by diode D11; metal-oxide-semiconductor Q21 is used to cut off load circuit and realizes short-circuit protection when the led light source short circuit, and R141, R131 are used to be provided with the over-voltage protection point of circuit, and LED opens circuit or realizes being output as 0 when unloaded; thereby reduced power consumption; strengthened fail safe, other is an auxiliary circuit, does not add auspicious stating.
Light adjusting circuit 6 is made up of following elements: single-chip microcomputer U6, integrated package U5, resistance R, Ra, Rb, Rc, Rd, capacitor C U1, CU2, CU3, CU4, CU5, CX1, CX2, crystal oscillator Y, switch S.Its operation principle is: behind the power connection, through CU2 voltage stabilizing, CU1 filtering after integrated package U5 conversion is output as DC5V voltage, again through CU3 voltage stabilizing, CU4 filtering, CU5 and R form electrify restoration circuit, S is a manual reset switch, CX1, CX2, Y form external oscillation circuit, pick up counting behind the single-chip microcomputer U6 electrification reset, timing time is exported four tunnel control signals to U6, export to four road pwm control circuits respectively through resistance R a, Rb, Rc and Rd, to change the output current of pwm control circuit, realize the change power adjustments of high-power LED light source.
Described high-power LED light source 5 adopts the form of 10～18 1W LED series connection.
Therefore slowed down the impact of high temperature and heavy current by light modulation and constant current function, thereby prolonged the useful life of LED high-power LED light source; The utility model is specially adapted to do with great power LED the illuminator of light source.
Above-described embodiment, the utility model embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solutions of the utility model scope and replacing all should be included in the protection range of the present utility model.
Claims (4)
1. LED constant-flow driver with dimming function, it is characterized in that, it comprises DC power supply, filter circuit, reverse-connection preventing circuit, pwm control circuit and the high-power LED light source that connects successively, the reverse-connection preventing circuit output also is connected with the light adjusting circuit input simultaneously, and the light adjusting circuit output then is connected with the pwm control circuit input.
2. the LED constant-flow driver of band dimming function as claimed in claim 1 is characterized in that, described DC power supply is DC24V.
3. the LED constant-flow driver of band dimming function as claimed in claim 1 is characterized in that described pwm control circuit is provided with overvoltage and short-circuit protection circuit, and its output circuit has the 1-4 road.
4. the LED constant-flow driver of band dimming function as claimed in claim 1 is characterized in that, described high-power LED light source is that the LED that 10～18 power are 1W is composed in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200279363U CN201263227Y (en) | 2008-09-09 | 2008-09-09 | LED constant-current driver with light modulation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200279363U CN201263227Y (en) | 2008-09-09 | 2008-09-09 | LED constant-current driver with light modulation function |
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| Publication Number | Publication Date |
|---|---|
| CN201263227Y true CN201263227Y (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200279363U Expired - Fee Related CN201263227Y (en) | 2008-09-09 | 2008-09-09 | LED constant-current driver with light modulation function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984735A (en) * | 2010-11-26 | 2011-03-09 | 皇明洁能控股有限公司 | Light emitting diode (LED) constant current driver and illuminating system |
| CN101697653B (en) * | 2009-10-29 | 2012-08-08 | 华南理工大学 | Intelligent dimming driver for networking-type high-power packaged LEDs |
| CN102982770A (en) * | 2012-11-23 | 2013-03-20 | 四川长虹欣锐科技有限公司 | Flat panel light emitting diode (LED) backlight drive output short circuit protective circuit |
| CN103338567A (en) * | 2013-07-22 | 2013-10-02 | 奇瑞汽车股份有限公司 | Vehicle lamp driving circuit |
| CN103747567A (en) * | 2013-12-23 | 2014-04-23 | 柳州职业技术学院 | LED light source constant-current driving circuit |
| CN107809825A (en) * | 2017-11-09 | 2018-03-16 | 北京嘉寓门窗幕墙股份有限公司 | Photovoltaic controller and brightness adjusting method for LED lamp |
-
2008
- 2008-09-09 CN CNU2008200279363U patent/CN201263227Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101697653B (en) * | 2009-10-29 | 2012-08-08 | 华南理工大学 | Intelligent dimming driver for networking-type high-power packaged LEDs |
| CN101984735A (en) * | 2010-11-26 | 2011-03-09 | 皇明洁能控股有限公司 | Light emitting diode (LED) constant current driver and illuminating system |
| CN102982770A (en) * | 2012-11-23 | 2013-03-20 | 四川长虹欣锐科技有限公司 | Flat panel light emitting diode (LED) backlight drive output short circuit protective circuit |
| CN103338567A (en) * | 2013-07-22 | 2013-10-02 | 奇瑞汽车股份有限公司 | Vehicle lamp driving circuit |
| CN103338567B (en) * | 2013-07-22 | 2015-06-10 | 奇瑞汽车股份有限公司 | Vehicle lamp driving circuit |
| CN103747567A (en) * | 2013-12-23 | 2014-04-23 | 柳州职业技术学院 | LED light source constant-current driving circuit |
| CN107809825A (en) * | 2017-11-09 | 2018-03-16 | 北京嘉寓门窗幕墙股份有限公司 | Photovoltaic controller and brightness adjusting method for LED lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUANGMING ENERGY-SAVING HOLDINGS CO., LTD. Free format text: FORMER OWNER: HIMIN SOLAR ENERGY GROUP CO.,LTD. Effective date: 20100402 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100402 Address after: 253090, No. 909, middle Avenue, Hubin, Dezhou, Shandong Patentee after: Himin Holdings Co., Ltd. Address before: 253090, No. 909, middle Avenue, Hubin, Dezhou, Shandong Patentee before: Himin Solar Energy Group Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090624 Termination date: 20130909 |