CN201114903Y - High-power LED light adjusting driving circuit - Google Patents
High-power LED light adjusting driving circuit Download PDFInfo
- Publication number
- CN201114903Y CN201114903Y CNU2007201224467U CN200720122446U CN201114903Y CN 201114903 Y CN201114903 Y CN 201114903Y CN U2007201224467 U CNU2007201224467 U CN U2007201224467U CN 200720122446 U CN200720122446 U CN 200720122446U CN 201114903 Y CN201114903 Y CN 201114903Y
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- resistance
- voltage
- led light
- pwm module
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Abstract
The utility model discloses a large power LED light adjustment drive circuit which comprises a rectification module, a PWM module, a voltage adjusting module and a voltage-stabilizing module. An output end of the rectification module is connected with a voltage input end of the PWM module; a switch power output end of the PWM module is connected with the voltage-stabilizing module; one end of the voltage adjusting module is connected with a VCC end of the PWM module while one end of the voltage adjusting module is connected with a feedback end of the PWM module and the other end of the voltage adjusting module is grounded. An output end of the voltage adjusting module of the large power LED light adjustment drive circuit of the utility model is connected with the cathode of loaded LED while an output end of the voltage-stabilizing module is connected with the anode of the loaded LED; the output current can be set in an appropriate range according to different requirements and ensured to regulate the brightness of the loaded LED to realize output with stable brightness or to satisfy different brightness requirements of the LED lighting under various circumstances.
Description
[technical field]
The utility model relates to a kind of circuit, particularly a kind of circuit of scalable electric current output.
[background technology]
High-power LED illumination product all can't be realized dimming function at present, can't regulate brightness to adapt to various environment; And the LED intrinsic brightness is inhomogeneous to be the big defective of LED, even its brightness of LED wafer of same batch of production also can be very inhomogeneous, generally is divided into 3-4 grade according to brightness is unusual; So the product luminance difference that LED light fixture manufacturer produces is very big.
[summary of the invention]
Main purpose of the present utility model is: design and a kind ofly decide electric current and export adjustable drive circuit, be used for LED is realized brightness regulation.
For achieving the above object, the utility model proposes a kind of great power LED light modulation drive circuit, comprise rectification module, PWM module, Voltage stabilizing module, voltage regulating module; Described rectification module output is connected with described PWM module voltage input, and described PWM module switch power output end is connected with described Voltage stabilizing module; Described voltage regulating module one end connects the reference voltage terminal of described PWM module, and an end connects described PWM module feedback end, an end ground connection.
Above-mentioned great power LED light modulation drive circuit also comprises filtration module, is connected between described rectification module output and the described PWM module voltage input.
Above-mentioned great power LED light modulation drive circuit, described voltage regulating module comprises first resistance, adjustable resistance, second resistance; Described first resistance is connected between the reference voltage terminal and feedback end of described PWM module; Described adjustable resistance one end connects the feedback end of described PWM module, and the other end is connected in described second resistance, one end; The described second resistance other end ground connection.Described voltage regulating module also comprises the 3rd resistance, the 4th resistance, and described the 4th resistance is connected between the described adjustable resistance and second resistance, and described the 3rd resistance and described adjustable resistance are connected in parallel.
Above-mentioned great power LED light modulation drive circuit, described Voltage stabilizing module comprises filter inductance, filter capacitor and fly-wheel diode, and described filter inductance one end connects described PWM module switch power output end, and the other end connects described filter capacitor; Described filter capacitor other end ground connection, described fly-wheel diode one termination PWM module switch power output end, other end ground connection.
Above-mentioned great power LED light modulation drive circuit also comprises decoupling capacitor, is connected between the VCC end and ground of described PWM module.
Owing to adopted above scheme, the utility model is with the negative pole of the output connection load LED of Voltage stabilizing module, and the Voltage stabilizing module output connects the positive pole of load LED, and output current can be set in OK range according to different needs; Its brightness to load LED is regulated, to realize stable brightness output; Or to adapt to the brightness requirement of under the various varying environments LED being thrown light on.
The utility model volume is little, and drive current is big, and drive current reaches as high as 3A when enough big in the space; Inner PWM control output, input voltage is wide, AC/DC universal, maximum input voltage can reach DC26V, and circuit start voltage can apparent load and decide, and the output voltage values maximum can reach 90% of input voltage value, and the circuit efficiency height most effectively reaches 91%; Circuit heating itself is little; Economize on electricity.
[description of drawings]
Fig. 1 is a schematic block circuit diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of the utility model embodiment.
[embodiment]
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
Please refer to Fig. 1, circuit theory diagrams shown in Figure 2, rectification module, filtration module, PWM module, voltage regulating module, Voltage stabilizing module; The rectification module output is connected with the filtration module input, and the filtration module output connects the voltage input end VIN of PWM module, and PWM module switch power output end LX is connected with Voltage stabilizing module; Voltage regulating module one end connects the reference voltage terminal VCC of PWM module, and an end connects PWM module feedback end FB, an end ground connection.The output of voltage regulating module is used to connect the negative pole of great power LED end, the output of Voltage stabilizing module is used to connect the positive pole of great power LED, by to voltage regulating module second resistance R 2 voltage-regulation, make the great power LED drive current adjustable, thereby reach adjusting, to realize stable brightness output to its brightness.
Please refer to shown in Figure 2, the operation principle of its circuit is: the electrochemical capacitor filtering of filtration module is passed through in the combined-voltage input after rectifier module D 1 rectification, voltage input end VIN for PWM module U1 uses, the VCC pin of PWM module U1, by connecting a 1uF decoupling capacitor, reach the decoupling function to GND; Voltage regulating module comprises first resistance R 1, second resistance R 2, adjustable resistance VR, the 3rd resistance R 3, the 4th resistance R 4; Voltage stabilizing module comprises filter inductance L1, filter capacitor C6 and sustained diode 2, and filter inductance L1 one end connects PWM module switch power output end, and the other end connects filter capacitor C6; Filter capacitor C6 other end ground connection, sustained diode 2 one termination PWM module switch power output ends, other end ground connection.
Second resistance R, 2 resistances, 0.3 Ω, the 3rd resistance R 3 resistance 6.2K Ω, the 4th resistance R 4 resistance 1.2K Ω; The VCC pin has the reference voltage of a 4.2V, i.e. A point voltage, and the VCC pin is received the feedback end FB of U1 by first resistance R 1 of a 39K, and this feedback end voltage is 0.8V, and the electric current that therefore flows through R1 is:
I
R1＝(V
A-V
B)/R1＝(4.2-0.8)/39K＝0.000087A
V
C＝V
B-I
R1*(R3+VR//1.2K)＝0.8-0.000087*(6.2K+VR//1.2K)
I
LED＝V
C/R2＝[0.8-0.000087*(6.2K+VR//1.2K)]/0.3。
So the LED electric current can be realized Current Regulation by an adjustable resistance.Illustrating, is the 2K adjustable resistance as VR, when VR transfers to maximum:
I
LEDMinimum=[0.8-0.000087* (6.2K+0.75K)]/0.3=652mA
When VR transfers to hour, I
LEDMaximum=868mA, wherein R4 is the VR protective resistance, the LED electric current is 520mA when VR opens a way, and changes the resistance of the 4th resistance R 4, adjustable resistance VR, the 3rd resistance R 3, second resistance R 2, just can easily regulate the LED electric current in OK range.With this, can realize brightness adjustment to the LED lighting, guarantee consistency of product; Also can regulate brightness on request.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (6)
1. a great power LED light modulation drive circuit is characterized in that: comprise rectification module, PWM module, voltage regulating module, Voltage stabilizing module; Described rectification module output is connected with described PWM module voltage input, and described PWM module switch power output end is connected with described Voltage stabilizing module; Described voltage regulating module one end connects the VCC end of described PWM module, and an end connects described PWM module feedback end, an end ground connection.
2. great power LED light modulation drive circuit as claimed in claim 1 is characterized in that: also comprise filtration module, be connected between described rectification module output and the described PWM module voltage input.
3. great power LED light modulation drive circuit as claimed in claim 1 or 2 is characterized in that: described voltage regulating module comprises first resistance (R1), adjustable resistance (VR), second resistance (R2); Described first resistance (R1) is connected between the VCC end and feedback end of described PWM module; Described adjustable resistance (VR) end connects the feedback end of described PWM module, and the other end is connected in described second resistance (R2) end; Described second resistance (R2) other end ground connection.
4. great power LED light modulation drive circuit as claimed in claim 3, it is characterized in that: described voltage regulating module also comprises the 3rd resistance (R3), the 4th resistance (R4), described the 3rd resistance (R3) is connected between described adjustable resistance (VR) and second resistance (R2), and described the 4th resistance (R4) is connected in parallel with described adjustable resistance (VR).
5. great power LED light modulation drive circuit as claimed in claim 3, it is characterized in that: described Voltage stabilizing module comprises filter inductance (L1), filter capacitor (C6) and fly-wheel diode (D2), described filter inductance (L1) end connects described PWM module switch power output end, and the other end connects described filter capacitor (C6); Described filter capacitor (C6) other end ground connection, described fly-wheel diode (D2) termination PWM module switch power output end, other end ground connection.
6. great power LED light modulation drive circuit as claimed in claim 3 is characterized in that: also comprise decoupling capacitor (C4), be connected between the VCC end and ground of described PWM module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201224467U CN201114903Y (en) | 2007-08-24 | 2007-08-24 | High-power LED light adjusting driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201224467U CN201114903Y (en) | 2007-08-24 | 2007-08-24 | High-power LED light adjusting driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201114903Y true CN201114903Y (en) | 2008-09-10 |
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ID=39966654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201224467U Expired - Fee Related CN201114903Y (en) | 2007-08-24 | 2007-08-24 | High-power LED light adjusting driving circuit |
Country Status (1)
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|---|---|
| CN (1) | CN201114903Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103582261A (en) * | 2013-11-08 | 2014-02-12 | 桂林机床电器有限公司 | LED driving circuit |
| CN103579217A (en) * | 2013-11-08 | 2014-02-12 | 天水天光半导体有限责任公司 | Power module packaged in ultra-small mode and packaging method thereof |
| CN104768262A (en) * | 2014-01-02 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Boost dimming LED constant-current driving circuit |
| WO2016091170A1 (en) * | 2014-12-12 | 2016-06-16 | 骆武宁 | Stepless dimming control method of lighting system |
| CN108183748A (en) * | 2018-02-12 | 2018-06-19 | 衢州市江氏电子科技有限公司 | A kind of high-power LED indoor visible light communication device |
| CN108811248A (en) * | 2018-06-27 | 2018-11-13 | 北京小米移动软件有限公司 | Light adjusting circuit and lamps and lanterns |
-
2007
- 2007-08-24 CN CNU2007201224467U patent/CN201114903Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103582261A (en) * | 2013-11-08 | 2014-02-12 | 桂林机床电器有限公司 | LED driving circuit |
| CN103579217A (en) * | 2013-11-08 | 2014-02-12 | 天水天光半导体有限责任公司 | Power module packaged in ultra-small mode and packaging method thereof |
| CN103579217B (en) * | 2013-11-08 | 2017-02-08 | 天水天光半导体有限责任公司 | Power module packaged in ultra-small mode and packaging method thereof |
| CN104768262A (en) * | 2014-01-02 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Boost dimming LED constant-current driving circuit |
| WO2016091170A1 (en) * | 2014-12-12 | 2016-06-16 | 骆武宁 | Stepless dimming control method of lighting system |
| CN108183748A (en) * | 2018-02-12 | 2018-06-19 | 衢州市江氏电子科技有限公司 | A kind of high-power LED indoor visible light communication device |
| CN108811248A (en) * | 2018-06-27 | 2018-11-13 | 北京小米移动软件有限公司 | Light adjusting circuit and lamps and lanterns |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080910 Termination date: 20100824 |