CN105323930A - LED dimming constant-current drive circuit - Google Patents
LED dimming constant-current drive circuit Download PDFInfo
- Publication number
- CN105323930A CN105323930A CN201510786250.7A CN201510786250A CN105323930A CN 105323930 A CN105323930 A CN 105323930A CN 201510786250 A CN201510786250 A CN 201510786250A CN 105323930 A CN105323930 A CN 105323930A
- Authority
- CN
- China
- Prior art keywords
- resistance
- circuit
- electric capacity
- diode
- constant
- 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.)
- Granted
Links
Abstract
The invention discloses an LED dimming constant-current drive circuit. The LED dimming constant-current drive circuit comprises an input end, a rectification filter circuit, a power factor correction circuit, a dimming circuit, a constant-current circuit and an output end, which are sequentially connected with one another, wherein the input end is connected with a power supply; and the output end is connected with an LED. The LED dimming constant-current drive circuit disclosed by the invention not only has the characteristics of the universality and the reliability of an LED lamp and a dimmer, but also has the characteristics of simplicity in circuit, low cost, high PF value, high conversion efficiency, low radiation and the like, so as to obtain extremely high market competitiveness. In addition, operation of LED loads with different power can be achieved by only changing parameters of a resistor RT1, a resistor R5, a resistor R7 and an inductor L2 in the circuit and the power of related elements, so that the LED lamp manufactured by the LED dimming constant-current drive circuit has a good dimming effect no matter that the LED lamp is applied to a traditional dimmer or an existing or future dimmer; a high PF value can also be obtained; and the targets of high conversion efficiency, low radiation and low cost are achieved.
Description
technical field:
The present invention relates to LED light regulating technology field, refer in particular to a kind of low cost, high performance LED light modulation constant-current drive circuit.
background technology:
Light modulation constant current-supplying mode is adopted to be more satisfactory LED and LED product supply power mode, the current fluctuation that light modulation constant current-supplying mode can be avoided the change of LED forward voltage and cause, electric current constant in dimming process makes LED luminance stablize simultaneously, so that there will not be the wild effects such as flicker and stroboscopic to occur, therefore existing LED dimming driving circuit is when designing except will meeting safety and requiring, also remains on constant-current characteristics in dimming process as far as possible.
But existing LED light modulation constant-current drive circuit, general is all develop design for specific several brand or multiple brand dimmer, the i.e. dimmer of different brands, need different light modulation constant-current drive circuits, a light modulation constant-current drive circuit can only be applicable to the dimmer use of some brand specifications and models, have limitation, development cost is also high.
In addition, also there is low PF(power factor in existing LED light modulation constant-current drive circuit) shortcoming such as value, low conversion efficiency, high radiation, the power consumption of drive circuit self is increased, and the system effectiveness of whole LED is lower.
summary of the invention:
The object of the invention is to overcome the deficiencies in the prior art, a kind of low cost, high performance LED light modulation constant-current drive circuit are provided.
In order to solve the problems of the technologies described above, present invention employs following technical proposals: this LED light modulation constant-current drive circuit comprises the input, current rectifying and wave filtering circuit, circuit of power factor correction, light adjusting circuit, constant-current circuit and the output that connect successively, this input connects power supply, and output connects LED.
Furthermore, in technique scheme, described current rectifying and wave filtering circuit comprises: be connected to fuse F1, piezo-resistance RV1 between input and circuit of power factor correction, resistance R1, resistance R2, bridge rectifier diode BD1 and electric capacity C1, electric capacity C2, electric capacity C3 and inductance L 1.
Furthermore, in technique scheme, described fuse F1 is connected with input, and piezo-resistance RV1 and electric capacity C1 is all parallel on the 2nd, the 3rd pin of bridge rectifier diode BD1; Resistance R1 is connected between piezo-resistance RV1 and electric capacity C1, and is connected with the 2nd pin of bridge rectifier diode BD1; Resistance R2 is connected between the 3rd pin of bridge rectifier diode BD1 and electric capacity C1; Electric capacity C2 and electric capacity C3 is all parallel on the 1st, the 4th pin of bridge rectifier diode BD1, and described inductance L 1 two ends are connected with electric capacity C2 and electric capacity C3 respectively, and this inductance L 1 is also connected with the 1st pin of bridge rectifier diode BD1.
Furthermore, in technique scheme, described circuit of power factor correction comprises and is connected to diode D1, diode D2, diode D3, electric capacity C4, electric capacity C5 and resistance R3 between current rectifying and wave filtering circuit and light adjusting circuit, resistance R4.
Furthermore, in technique scheme, the negative electrode of described diode D1 is all connected with current rectifying and wave filtering circuit and light adjusting circuit, the anode of diode D1 connects the negative electrode of diode D2, the anode of diode D2 connects the negative electrode of diode D3, and the anode of diode D3 connects current rectifying and wave filtering circuit and light adjusting circuit; Described electric capacity C4 and resistance R3 is all parallel between the anode of diode D3 and the negative electrode of diode D2; Described electric capacity C5 and resistance R4 is all parallel between the anode of diode D2 and the negative electrode of diode D1.
Furthermore, in technique scheme, described light adjusting circuit comprises the resistance RT1, resistance R5, resistance R6, triode Q1, electric capacity C6 and the inductance L 2 that are connected between circuit of power factor correction and constant-current circuit.
Furthermore, in technique scheme, the collector electrode of described triode Q1 connects circuit of power factor correction, and the emitter of triode Q1 is all connected constant-current circuit with base stage; Between the collector electrode that resistance RT1 and resistance R5 is connected to triode Q1 after connecting and base stage, after the base stage contact resistance R6 of triode Q1 and electric capacity C6, connect described inductance L 2.
Furthermore, in technique scheme, described constant-current circuit comprises triode Q2, electric capacity C7 between light adjusting circuit and output, diode D4, resistance R7 and described inductance L 2.
Furthermore, in technique scheme, the collector electrode of described triode Q2 connects light adjusting circuit, and between the emitting stage that resistance R7 is connected to triode Q2 after connecting with diode D4 and base stage, and this diode D4 connects light adjusting circuit, and resistance R7 connects inductance L 2; Between the emitting stage that electric capacity C7 is connected to triode Q2 and base stage.
Furthermore, in technique scheme, described output is parallel with resistance R8 and electric capacity C8 for preventing the brave impact of moment wave, and this resistance R8 is also connected with described constant-current circuit with electric capacity C8.
After adopting technique scheme, the present invention has following beneficial effect compared with prior art:
1, LED light modulation constant-current drive circuit of the present invention not only has the characteristic in the versatility and reliability of LED lamp and dimmer, also there is the features such as simple, with low cost, the high PF value of circuit, high conversion efficiency, Low emissivity simultaneously, so that there is the high market competitiveness.
2, the present invention only need change resistance RT1, resistance R5, resistance R7, the parameter of inductance L 2 and the power of each related elements and can realize should doing of different capacity LED load.So no matter the LED lamp made by the present invention is be used in traditional dimmer, or now or in dimmer in the future, all there is good dimming effect, also can obtain high PF value, reach the object of high conversion efficiency, Low emissivity, low cost.
accompanying drawing illustrates:
Fig. 1 is circuit diagram of the present invention.
embodiment:
Below in conjunction with specific embodiments and the drawings, the present invention is further described.
As shown in Figure 1, for a kind of LED light modulation constant-current drive circuit, it is characterized in that: comprise the input 1, current rectifying and wave filtering circuit 2, circuit of power factor correction 3, light adjusting circuit 4, constant-current circuit 5 and the output 6 that connect successively, this input 1 connects power supply, and output 6 connects LED.
Described current rectifying and wave filtering circuit comprises: be connected to fuse F1, piezo-resistance RV1 between input 1 and circuit of power factor correction 3, resistance R1, resistance R2, bridge rectifier diode BD1 and electric capacity C1, electric capacity C2, electric capacity C3 and inductance L 1.Specifically, described fuse F1 is connected with input 1, and piezo-resistance RV1 and electric capacity C1 is all parallel on the 2nd, the 3rd pin of bridge rectifier diode BD1; Resistance R1 is connected between piezo-resistance RV1 and electric capacity C1, and is connected with the 2nd pin of bridge rectifier diode BD1; Resistance R2 is connected between the 3rd pin of bridge rectifier diode BD1 and electric capacity C1; Electric capacity C2 and electric capacity C3 is all parallel on the 1st, the 4th pin of bridge rectifier diode BD1, and described inductance L 1 two ends are connected with electric capacity C2 and electric capacity C3 respectively, and this inductance L 1 is also connected with the 1st pin of bridge rectifier diode BD1.
Described circuit of power factor correction 3 comprises and is connected to diode D1, diode D2, diode D3, electric capacity C4, electric capacity C5 and resistance R3 between current rectifying and wave filtering circuit 2 and light adjusting circuit 4, resistance R4.Specifically, the negative electrode of described diode D1 is all connected with current rectifying and wave filtering circuit 2 and light adjusting circuit 4, the anode of diode D1 connects the negative electrode of diode D2, and the anode of diode D2 connects the negative electrode of diode D3, and the anode of diode D3 connects current rectifying and wave filtering circuit 2 and light adjusting circuit 4; Described electric capacity C4 and resistance R3 is all parallel between the anode of diode D3 and the negative electrode of diode D2; Described electric capacity C5 and resistance R4 is all parallel between the anode of diode D2 and the negative electrode of diode D1.
Described light adjusting circuit 4 comprises the resistance RT1, resistance R5, resistance R6, triode Q1, electric capacity C6 and the inductance L 2 that are connected between circuit of power factor correction 3 and constant-current circuit 5.Specifically, the collector electrode of described triode Q1 connects circuit of power factor correction 3, and the emitter of triode Q1 is all connected constant-current circuit 5 with base stage; Between the collector electrode that resistance RT1 and resistance R5 is connected to triode Q1 after connecting and base stage, after the base stage contact resistance R6 of triode Q1 and electric capacity C6, connect described inductance L 2.
Described constant-current circuit 5 comprises triode Q2, electric capacity C7 between light adjusting circuit 4 and output 6, diode D4, resistance R7 and described inductance L 2.
The collector electrode of described triode Q2 connects light adjusting circuit 4, and between the emitting stage that resistance R7 is connected to triode Q2 after connecting with diode D4 and base stage, and this diode D4 connects light adjusting circuit 4, and resistance R7 connects inductance L 2; Between the emitting stage that electric capacity C7 is connected to triode Q2 and base stage.
Described output is parallel with resistance R8 and electric capacity C8 for preventing the brave impact of moment wave, and this resistance R8 and electric capacity C8 are also connected with described constant-current circuit 5.
Operation principle of the present invention is as follows:
When output connects corresponding LED, input connects alternating current, alternating current obtains level and smooth direct current after current rectifying and wave filtering circuit rectification, and then resistance R3, diode D1, the resistance R4 in circuit of power factor correction, the work changing discharge and recharge by electric capacity C4, electric capacity C5, diode D1, diode D3 obtains the electric energy (this is valley fill type pfc circuit) of a high PFC; When electric energy arrives the 2nd pin of triode Q1, there is the saturation conduction of moment in triode Q1, while moment saturation conduction, whole circuit and load (LED) form a loop, thus a coupled voltages is there is on the 1-5 pin of inductance L 2, through resistance R6, electric capacity C6 is charged, thus make the work of triode Q1 normally; When input voltage changes, the voltage of the 2nd pin of triode Q1 also changes thereupon, and the angle of flow of triode Q1 also changes thereupon, and the LED load power of output is also changed thereupon, thus realizes the function to LED light modulation; Resistance R7 is as the current-limiting resistance exporting LED load, when the circuit is operating, resistance R7 two ends there will be a voltage difference, resistance R7, diode D4, electric capacity C7, triode Q2 form a loop, no matter when whether power output is when changing, can be monitored at any time, and by the 1st pin of supply triode Q1 stable after this loop is revised for information accurately, thus realize the object that no matter whether all there will not be flicker or stroboscopic when light modulation; Electric capacity C8, resistance R8 can prevent the brave impact of moment wave to the damage of LED load and there will be glittering when the moment of closing input.
Therefore, the present invention only need change resistance RT1, resistance R5, resistance R7, the parameter of inductance L 2 and the power of each related elements and can realize should doing of different capacity LED load.So no matter the LED lamp made by the present invention is be used in traditional dimmer, or now or in dimmer in the future, all there is good dimming effect, also can obtain high PF value, reach the object of high conversion efficiency, Low emissivity, low cost.In addition, LED light modulation constant-current drive circuit of the present invention not only has the characteristic in the versatility and reliability of LED lamp and dimmer, also there is the features such as simple, with low cost, the high PF value of circuit, high conversion efficiency, Low emissivity simultaneously, so that there is the high market competitiveness.
Certainly, the foregoing is only specific embodiments of the invention, be not limit the scope of the present invention, all equivalences done according to structure, feature and principle described in the present patent application the scope of the claims change or modify, and all should be included in the present patent application the scope of the claims.
Claims (10)
1.LED light modulation constant-current drive circuit, it is characterized in that: comprise the input (1), current rectifying and wave filtering circuit (2), circuit of power factor correction (3), light adjusting circuit (4), constant-current circuit (5) and the output (6) that connect successively, this input (1) connects power supply, and output (6) connects LED.
2. LED light modulation constant-current drive circuit according to claim 1, is characterized in that: described current rectifying and wave filtering circuit comprises: be connected to fuse F1, piezo-resistance RV1 between input (1) and circuit of power factor correction (3), resistance R1, resistance R2, bridge rectifier diode BD1 and electric capacity C1, electric capacity C2, electric capacity C3 and inductance L 1.
3. LED light modulation constant-current drive circuit according to claim 2, is characterized in that: described fuse F1 is connected with input (1), and piezo-resistance RV1 and electric capacity C1 is all parallel on the 2nd, the 3rd pin of bridge rectifier diode BD1; Resistance R1 is connected between piezo-resistance RV1 and electric capacity C1, and is connected with the 2nd pin of bridge rectifier diode BD1; Resistance R2 is connected between the 3rd pin of bridge rectifier diode BD1 and electric capacity C1; Electric capacity C2 and electric capacity C3 is all parallel on the 1st, the 4th pin of bridge rectifier diode BD1, and described inductance L 1 two ends are connected with electric capacity C2 and electric capacity C3 respectively, and this inductance L 1 is also connected with the 1st pin of bridge rectifier diode BD1.
4. LED light modulation constant-current drive circuit according to claim 1, is characterized in that: described circuit of power factor correction (3) comprises and is connected to diode D1, diode D2, diode D3, electric capacity C4, electric capacity C5 and resistance R3 between current rectifying and wave filtering circuit (2) and light adjusting circuit (4), resistance R4.
5. LED light modulation constant-current drive circuit according to claim 1, it is characterized in that: the negative electrode of described diode D1 is all connected with current rectifying and wave filtering circuit (2) and light adjusting circuit (4), the anode of diode D1 connects the negative electrode of diode D2, the anode of diode D2 connects the negative electrode of diode D3, and the anode of diode D3 connects current rectifying and wave filtering circuit (2) and light adjusting circuit (4); Described electric capacity C4 and resistance R3 is all parallel between the anode of diode D3 and the negative electrode of diode D2; Described electric capacity C5 and resistance R4 is all parallel between the anode of diode D2 and the negative electrode of diode D1.
6. LED light modulation constant-current drive circuit according to claim 1, is characterized in that: described light adjusting circuit (4) comprises the resistance RT1, resistance R5, resistance R6, triode Q1, electric capacity C6 and the inductance L 2 that are connected between circuit of power factor correction (3) and constant-current circuit (5).
7. LED light modulation constant-current drive circuit according to claim 6, is characterized in that: the collector electrode of described triode Q1 connects circuit of power factor correction (3), and emitter and the base stage of triode Q1 are all connected constant-current circuit (5); Between the collector electrode that resistance RT1 and resistance R5 is connected to triode Q1 after connecting and base stage, after the base stage contact resistance R6 of triode Q1 and electric capacity C6, connect described inductance L 2.
8. LED light modulation constant-current drive circuit according to claim 6, is characterized in that: described constant-current circuit (5) comprises triode Q2, electric capacity C7 between light adjusting circuit (4) and output (6), diode D4, resistance R7 and described inductance L 2.
9. LED light modulation constant-current drive circuit according to claim 8, it is characterized in that: the collector electrode of described triode Q2 connects light adjusting circuit (4), between the emitting stage that resistance R7 is connected to triode Q2 after connecting with diode D4 and base stage, and this diode D4 connects light adjusting circuit (4), resistance R7 connects inductance L 2; Between the emitting stage that electric capacity C7 is connected to triode Q2 and base stage.
10. the LED light modulation constant-current drive circuit according to claim 1-9 any one, it is characterized in that: described output is parallel with resistance R8 and electric capacity C8 for preventing the brave impact of moment wave, and this resistance R8 and electric capacity C8 are also connected with described constant-current circuit (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510786250.7A CN105323930B (en) | 2015-11-13 | 2015-11-13 | LED dims constant-current drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510786250.7A CN105323930B (en) | 2015-11-13 | 2015-11-13 | LED dims constant-current drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105323930A true CN105323930A (en) | 2016-02-10 |
| CN105323930B CN105323930B (en) | 2018-01-09 |
Family
ID=55250292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510786250.7A Expired - Fee Related CN105323930B (en) | 2015-11-13 | 2015-11-13 | LED dims constant-current drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105323930B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108809090A (en) * | 2018-06-19 | 2018-11-13 | 四川大学 | A kind of High Power Factor multichannel low ripple constant current output switch converters |
| CN108040400B (en) * | 2018-01-12 | 2023-07-18 | 美智光电科技股份有限公司 | LED driving circuit and LED lamp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110012936A1 (en) * | 2009-07-17 | 2011-01-20 | Samsung Electronics Co., Ltd. | Backlight assembly and display apparatus having the same |
| US20110291574A1 (en) * | 2010-05-25 | 2011-12-01 | Shu Ji | Multi-channel constant current source and illumination source |
| CN202455590U (en) * | 2011-12-06 | 2012-09-26 | 重庆瑞升康博电气有限公司 | High-power intelligent LED power supply driver with innovative framework |
| CN203243574U (en) * | 2013-05-16 | 2013-10-16 | 电子科技大学中山学院 | Small-size high-efficient high-power LED lighting driver |
-
2015
- 2015-11-13 CN CN201510786250.7A patent/CN105323930B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110012936A1 (en) * | 2009-07-17 | 2011-01-20 | Samsung Electronics Co., Ltd. | Backlight assembly and display apparatus having the same |
| US20110291574A1 (en) * | 2010-05-25 | 2011-12-01 | Shu Ji | Multi-channel constant current source and illumination source |
| CN202455590U (en) * | 2011-12-06 | 2012-09-26 | 重庆瑞升康博电气有限公司 | High-power intelligent LED power supply driver with innovative framework |
| CN203243574U (en) * | 2013-05-16 | 2013-10-16 | 电子科技大学中山学院 | Small-size high-efficient high-power LED lighting driver |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108040400B (en) * | 2018-01-12 | 2023-07-18 | 美智光电科技股份有限公司 | LED driving circuit and LED lamp |
| CN108809090A (en) * | 2018-06-19 | 2018-11-13 | 四川大学 | A kind of High Power Factor multichannel low ripple constant current output switch converters |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105323930B (en) | 2018-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101070076B1 (en) | AC LED circuit having improved power factor | |
| CN104022655A (en) | Electrolytic capacitor-free LED driving power supply based on flyback converter leakage inductance energy utilization | |
| CN102917511A (en) | Anti-lightning type LED (Light Emitting Diode) power supply | |
| CN105517268A (en) | Bus current control circuit, current-constant driving controller and LED light source | |
| CN109462917B (en) | Efficient closed-loop linear LED constant current control circuit and control method | |
| CN105323930A (en) | LED dimming constant-current drive circuit | |
| CN203608412U (en) | An LED lamp driving power supply employing optical coupler feedback control | |
| CN201491338U (en) | LED driver circuit | |
| CN203504821U (en) | Light adjustment type LED constant current driving power supply | |
| CN103094975A (en) | Storage battery charging circuit and light-emitting diode (LED) lamp thereof | |
| CN204482133U (en) | A kind of LED constant pressure and flow drive circuit | |
| CN202663613U (en) | Driving circuit for LED (light-emitting diode) MR16 reflector lamp | |
| CN202127538U (en) | LED (Light-Emitting Diode) driving circuit | |
| CN102111936B (en) | Light emitting diode (LED) driving power supply | |
| CN204598404U (en) | A kind of LED dimming power source | |
| CN204442775U (en) | A kind of controllable silicon light modulation LED drive circuit with compensating circuit | |
| CN203340372U (en) | LED lamp driving power supply employing analog dimming | |
| CN208273304U (en) | A kind of LED control device | |
| CN102932998B (en) | Power converter | |
| CN202135359U (en) | LED energy saving lamp control circuit possessing over-voltage protection function | |
| CN207652724U (en) | A kind of lamps and lanterns with fan | |
| CN204761769U (en) | LED control circuit | |
| CN204518158U (en) | LED temperature-compensation circuit | |
| CN203537600U (en) | Simple high-performance LED lamp driving power supply of circuit | |
| CN204291507U (en) | The high effective controlling light circuit of chargeable flashlight |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180109 Termination date: 20191113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |