CN105323930B - LED dims constant-current drive circuit - Google Patents
LED dims constant-current drive circuit Download PDFInfo
- Publication number
- CN105323930B CN105323930B CN201510786250.7A CN201510786250A CN105323930B CN 105323930 B CN105323930 B CN 105323930B CN 201510786250 A CN201510786250 A CN 201510786250A CN 105323930 B CN105323930 B CN 105323930B
- Authority
- CN
- China
- Prior art keywords
- resistance
- circuit
- electric capacity
- diode
- triode
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention discloses a kind of LED light modulations constant-current drive circuit, and it includes input, current rectifying and wave filtering circuit, circuit of power factor correction, light adjusting circuit, constant-current circuit and the output end being sequentially connected, input connection power supply, output end connection LED.LED light modulations constant-current drive circuit of the present invention not only has the characteristic in terms of LED lamp and the versatility and reliability of light modulator, also have the characteristics that circuit is simple, cost is cheap, high PF values, high conversion efficiency, Low emissivity simultaneously, so that with the high market competitiveness.In addition, the present invention need to only change should making for the i.e. achievable different capacity LED load of power of resistance RT1 in circuit, resistance R5, resistance R7, inductance L2 parameter and each related elements.So the LED lamp made by the present invention, is either used in traditional light modulator, or in present or future light modulator, good dimming effect is respectively provided with, also can obtain high PF values, reached high conversion efficiency, Low emissivity, the purpose of low cost.
Description
Technical field：
The present invention relates to LED light regulating technologies field, refers in particular to a kind of inexpensive, high performance LED light modulations constant-current drive circuit.
Background technology：
It is more satisfactory LED and LED product power supply mode using light modulation constant current-supplying mode, dims constant current-supplying mode
Current fluctuation caused by the change of LED forward voltages is avoided that, while constant electric current in dimming process makes LED luminance steady
It is fixed so that be not in that the wild effects such as flicker and stroboscopic occur, therefore existing LED dimming driving circuits in design except
Meet that safety requirement is outer, be also maintained at constant-current characteristics in dimming process as far as possible.
But existing LED light modulations constant-current drive circuit, typically dimmed for specific several brands or a variety of brands
Device carries out exploitation design, the i.e. light modulator of different brands, it is necessary to different light modulation constant-current drive circuit, a light modulation constant current driving
Circuit can only be adapted to the light modulator of some brand specifications and models to use, and have a limitation, and development cost is also high.
In addition, also there is low PF (power factor) value, low conversion efficiency, high radiation in existing LED light modulations constant-current drive circuit
The shortcomings of, increase the power consumption of drive circuit itself, whole LED system effectiveness is relatively low.
The content of the invention：
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of inexpensive, high performance LED light modulations constant current
Drive circuit.
In order to solve the above-mentioned technical problem, present invention employs following technical proposals：The LED dims constant-current drive circuit bag
The input being sequentially connected, current rectifying and wave filtering circuit, circuit of power factor correction, light adjusting circuit, constant-current circuit and output end are included, should
Input connects power supply, output end connection LED.
Furthermore, in above-mentioned technical proposal, the current rectifying and wave filtering circuit includes：It is connected to input and power factor
Fuse F1, piezo-resistance RV1, resistance R1, resistance R2, bridge rectifier diode BD1 and electric capacity C1, electricity between correcting circuit
Hold C2, electric capacity C3 and inductance L1.
Furthermore, in above-mentioned technical proposal, the fuse F1 is connected with input, piezo-resistance RV1 and electric capacity
C1 is parallel on the 2nd of bridge rectifier diode BD1 the, the 3rd pin；Resistance R1 is connected between piezo-resistance RV1 and electric capacity C1,
And it is connected with bridge rectifier diode BD1 the 2nd pin；Resistance R2 is connected to bridge rectifier diode BD1 the 3rd pin and electric capacity C1
Between；Electric capacity C2 and electric capacity C3 is parallel on the 1st of bridge rectifier diode BD1 the, the 4th pin, the inductance L1 both ends difference
It is connected with electric capacity C2 and electric capacity C3, and inductance L1 is also connected with bridge rectifier diode BD1 the 1st pin.
Furthermore, in above-mentioned technical proposal, described light adjusting circuit include be connected to circuit of power factor correction with
Resistance RT1, resistance R5, resistance R6, triode Q1, electric capacity C6 and inductance L2 between constant-current circuit；The collection of the triode Q1
Electrode connects circuit of power factor correction, and triode Q1 emitter stage and base stage are all connected with constant-current circuit 5；Resistance RT1 and resistance
It is connected between triode Q1 colelctor electrode and base stage after R5 series connection, connects after triode Q1 base stage connection resistance R6 and electric capacity C6
Meet the inductance L2.
Furthermore, in above-mentioned technical proposal, described light adjusting circuit include be connected to circuit of power factor correction with
Resistance RT1, resistance R5, resistance R6, triode Q1, electric capacity C6 and inductance L2 between constant-current circuit.
Furthermore, in above-mentioned technical proposal, the colelctor electrode connection circuit of power factor correction of the triode Q1, three
Pole pipe Q1 emitter stage and base stage is all connected with constant-current circuit；Triode Q1 current collection is connected to after resistance RT1 and resistance R5 series connection
Between pole and base stage, the inductance L2 is connected after triode Q1 base stage connection resistance R6 and electric capacity C6.
Furthermore, in above-mentioned technical proposal, the constant-current circuit includes three poles between light adjusting circuit and output end
Pipe Q2, electric capacity C7, diode D4, resistance R7 and described inductance L2.
Furthermore, in above-mentioned technical proposal, the colelctor electrode connection light adjusting circuit of the triode Q2, resistance R7 and two
It is connected to after pole pipe D4 series connection between triode Q2 emitter stage and base stage, and diode D4 connection light adjusting circuits, resistance R7
Connect inductance L2；Electric capacity C7 is connected between triode Q2 emitter stage and base stage.
Furthermore, in above-mentioned technical proposal, described output end is parallel with the electricity for preventing moment wave from bravely impacting
R8 and electric capacity C8 is hindered, resistance R8 and electric capacity C8 are also connected with described constant-current circuit.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art：
1st, LED light modulations constant-current drive circuit of the present invention not only has the versatility and reliability in LED lamp and light modulator
The characteristic of aspect, also have the characteristics that circuit is simple, cost is cheap, high PF values, high conversion efficiency, Low emissivity simultaneously, so that tool
There is the high market competitiveness.
2nd, the present invention need to only change the power of resistance RT1, resistance R5, resistance R7, inductance L2 parameter and each related elements
Should making for different capacity LED load can be achieved.So the LED lamp made by the present invention, is either used in traditional
Light modulator, or in present or future light modulator, good dimming effect is respectively provided with, high PF values have also been can obtain, have been reached
High conversion efficiency, Low emissivity, the purpose of low cost.
Brief description of the drawings：
Fig. 1 is the circuit diagram of the present invention.
Embodiment：
With reference to specific embodiments and the drawings, the present invention is further described.
As shown in Figure 1, constant-current drive circuit is dimmed for a kind of LED, it is characterised in that：Including be sequentially connected input 1,
Current rectifying and wave filtering circuit 2, circuit of power factor correction 3, light adjusting circuit 4, constant-current circuit 5 and output end 6, the input 1 connect electricity
Source, output end 6 connect LED.
The current rectifying and wave filtering circuit includes：Be connected to fuse F1 between input 1 and circuit of power factor correction 3,
Piezo-resistance RV1, resistance R1, resistance R2, bridge rectifier diode BD1 and electric capacity C1, electric capacity C2, electric capacity C3 and inductance L1.Tool
For body, the fuse F1 is connected with input 1, and piezo-resistance RV1 and electric capacity C1 are parallel to bridge rectifier diode BD1
The 2nd, on the 3rd pin；Resistance R1 is connected between piezo-resistance RV1 and electric capacity C1, and with the 2nd of bridge rectifier diode BD1 the
Pin connects；Resistance R2 is connected between bridge rectifier diode BD1 the 3rd pin and electric capacity C1；Electric capacity C2 and electric capacity C3 are in parallel
In bridge rectifier diode BD1 the 1st, on the 4th pin, the inductance L1 both ends are connected with electric capacity C2 and electric capacity C3 respectively, and should
Inductance L1 is also connected with bridge rectifier diode BD1 the 1st pin.
The circuit of power factor correction 3 includes the diode being connected between current rectifying and wave filtering circuit 2 and light adjusting circuit 4
D1, diode D2, diode D3, electric capacity C4, electric capacity C5 and resistance R3, resistance R4.Specifically, the current collection of the triode Q1
Pole connects circuit of power factor correction 3, and triode Q1 emitter stage and base stage are all connected with constant-current circuit 5；Resistance RT1 and resistance R5
It is connected to after series connection between triode Q1 colelctor electrode and base stage, is connected after triode Q1 base stage connection resistance R6 and electric capacity C6
The inductance L2.
Described light adjusting circuit 4 includes resistance RT1, the electricity being connected between circuit of power factor correction 3 and constant-current circuit 5
Hinder R5, resistance R6, triode Q1, electric capacity C6 and inductance L2.Specifically, the colelctor electrode connection power factor of the triode Q1
Correcting circuit 3, triode Q1 emitter stage and base stage are all connected with constant-current circuit 5；Three are connected to after resistance RT1 and resistance R5 series connection
Between pole pipe Q1 colelctor electrode and base stage, the inductance L2 is connected after triode Q1 base stage connection resistance R6 and electric capacity C6.
The constant-current circuit 5 includes triode Q2, electric capacity C7, diode D4, the electricity between light adjusting circuit 4 and output end 6
Hinder R7 and described inductance L2.
The colelctor electrode connection light adjusting circuit 4 of the triode Q2, resistance R7 are connected to triode after being connected with diode D4
Between Q2 emitter stage and base stage, and diode D4 connections light adjusting circuit 4, resistance R7 connection inductance L2；Electric capacity C7 is connected to
Between triode Q2 emitter stage and base stage.
Described output end is parallel with resistance R8 and electric capacity C8 for preventing moment wave from bravely impacting, resistance R8 and electric capacity
C8 is also connected with described constant-current circuit 5.
The operation principle of the present invention is as follows：
When output end connects corresponding LED, input connects alternating current, the rectified filter circuit rectification of alternating current
Smooth direct current is obtained afterwards, then again through the resistance R3 in circuit of power factor correction, diode D1, resistance R4, by electric capacity
The work that C4, electric capacity C5, diode D1, diode D3 can change discharge and recharge obtains high PFC electric energy (this is valley fill type PFC
Circuit)；When electric energy reaches triode Q1 2 pin, there is the saturation conduction of moment in triode Q1, in moment saturation conduction
Meanwhile whole circuit forms a loop with load (LED), so as to occur a coupled voltages, warp on inductance L2 1-5 pin
Resistance R6 charges to electric capacity C6, so that triode Q1 normallies work；When input voltage changes, the 2nd of triode Q1 the
The voltage of pin also changes therewith, and the triode Q1 angle of flow also changes therewith, the LED load power of output end is also become therewith
Change, so as to realize the function to LED light modulations；Current-limiting resistances of the resistance R7 as output LED load, when the circuit is operating, resistance
A voltage difference occurs in R7 both ends, and resistance R7, diode D4, electric capacity C7, triode Q2 form a loop, work as power output
Whether in change, can be monitored at any time, and the supply that accurately information is stablized after this loop is corrected
Triode Q1 the 1st pin, so as to realize regardless of in light modulation all without occurring flashing or the purpose of stroboscopic；Electric capacity C8,
Resistance R8 can prevent moment wave bravely impact damage to LED load and when the moment that closing inputs occur it is glittering.
Therefore, the present invention need to only change the work(of resistance RT1, resistance R5, resistance R7, inductance L2 parameter and each related elements
Rate is that should making for different capacity LED load can be achieved.So the LED lamp made by the present invention, is either used in tradition
Light modulator, or in present or future light modulator, be respectively provided with good dimming effect, also can obtain high PF values, reached
To high conversion efficiency, Low emissivity, low cost purpose.In addition, LED light modulations constant-current drive circuit of the present invention not only has in LED
Characteristic in terms of the versatility and reliability of light fixture and light modulator, and have simultaneously, circuit is simple, cost is cheap, high PF values, height
The features such as conversion efficiency, Low emissivity, so that with the high market competitiveness.
Certainly, the foregoing is only the specific embodiment of the present invention, be not to limit the scope of the present invention, it is all according to
The equivalent change or modification that construction, feature and principle described in scope of the present invention patent are done, all should be included in Shen of the present invention
Please be in the scope of the claims.
Claims (2)
1.LED dims constant-current drive circuit, it is characterised in that：Including be sequentially connected input (1), current rectifying and wave filtering circuit (2),
Circuit of power factor correction (3), light adjusting circuit (4), constant-current circuit (5) and output end (6), the input (1) connection power supply are defeated
Go out end (6) connection LED；The circuit of power factor correction (3) includes being connected to current rectifying and wave filtering circuit (2) and light adjusting circuit (4)
Between diode D1, diode D2, diode D3, electric capacity C4, electric capacity C5 and resistance R3, resistance R4；The diode D1's
Negative electrode is connected with current rectifying and wave filtering circuit (2) and light adjusting circuit (4), diode D1 negative electrode connection diode D2 anode, and two
Pole pipe D2 negative electrode connection diode D3 anode, diode D3 negative electrode connection current rectifying and wave filtering circuit (2) and light adjusting circuit
(4)；The electric capacity C4 and resistance R3 are parallel between diode D3 negative electrode and diode D2 anode；The electric capacity C5 and
Resistance R4 is parallel between diode D2 negative electrode and diode D1 anode；Described light adjusting circuit (4) includes being connected to
Resistance RT1, resistance R5, resistance R6, triode Q1, electric capacity C6 between circuit of power factor correction (3) and constant-current circuit (5) and
Inductance L2；The colelctor electrode connection circuit of power factor correction (3) of the triode Q1, triode Q1 emitter stage and base stage connect
Connect constant-current circuit 5；It is connected to after resistance RT1 and resistance R5 series connection between triode Q1 colelctor electrode and base stage, triode Q1's
The inductance L2 is connected after base stage connection resistance R6 and electric capacity C6；The constant-current circuit (5) includes light adjusting circuit (4) and output end
(6) triode Q2, electric capacity C7, diode D4, resistance R7 and described inductance L2 between；The colelctor electrode of the triode Q2 connects
Light adjusting circuit (4) is connect, resistance R7 is connected to after being connected with diode D4 between triode Q2 emitter stage and base stage, and two pole
Pipe D4 connection light adjusting circuits (4), resistance R7 connection inductance L2；Electric capacity C7 is connected between triode Q2 emitter stage and base stage.
2. LED according to claim 1 dims constant-current drive circuit, it is characterised in that：The current rectifying and wave filtering circuit includes：
Be connected to fuse F1 between input (1) and circuit of power factor correction (3), piezo-resistance RV1, resistance R1, resistance R2,
Bridge rectifier diode BD1 and electric capacity C1, electric capacity C2, electric capacity C3 and inductance L1；The fuse F1 is connected with input (1),
Piezo-resistance RV1 and electric capacity C1 is parallel on the 2nd of bridge rectifier diode BD1 the, the 3rd pin；Resistance R1 is connected to pressure-sensitive electricity
Between hindering RV1 and electric capacity C1, and it is connected with bridge rectifier diode BD1 the 2nd pin；Resistance R2 is connected to bridge rectifier diode
Between BD1 the 3rd pin and electric capacity C1；Electric capacity C2 and electric capacity C3 is parallel on the 1st of bridge rectifier diode BD1 the, the 4th pin,
The inductance L1 both ends are connected with electric capacity C2 and electric capacity C3 respectively, and 1st pin of the inductance L1 also with bridge rectifier diode BD1
Connection.
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 CN105323930A (en) | 2016-02-10 |
| CN105323930B true 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) |
Families Citing this family (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 |
| CN108809090B (en) * | 2018-06-19 | 2019-07-26 | 四川大学 | A kind of High Power Factor multichannel low ripple constant current output switch converters |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110007738A (en) * | 2009-07-17 | 2011-01-25 | 삼성전자주식회사 | Backlight assembly and display apparatus comprising the same |
| US8598807B2 (en) * | 2010-05-25 | 2013-12-03 | Virginia Tech Intellectual Properties, Inc. | Multi-channel constant current source and illumination source |
-
2015
- 2015-11-13 CN CN201510786250.7A patent/CN105323930B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105323930A (en) | 2016-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103491682B (en) | Linear switching constant-current LED drive circuit for control over peak current | |
| CN110099489B (en) | Driving circuit compatible with silicon controlled rectifier dimming and wireless dimming | |
| CN101790269A (en) | LED power supply with no-load and light-load protection output and capable of receiving phase-cut dimming stably | |
| CN102917511A (en) | Anti-lightning type LED (Light Emitting Diode) power supply | |
| CN103582257A (en) | LED driving device and method | |
| CN105517268A (en) | Bus current control circuit, current-constant driving controller and LED light source | |
| CN105323930B (en) | LED dims constant-current drive circuit | |
| CN104540271B (en) | A kind of self-adaptation type LED drive circuit | |
| CN104780694A (en) | LED touch dimming constant current drive power source | |
| CN203225917U (en) | LED drive circuit module | |
| CN103094975A (en) | Storage battery charging circuit and light-emitting diode (LED) lamp thereof | |
| CN205213087U (en) | Novel high -voltage line nature of can adjusting luminance LED drive power supply | |
| CN105873304A (en) | Alternating current direct driving intelligent dimming LED (light emitting diode) energy saving street lamp | |
| CN204482133U (en) | A kind of LED constant pressure and flow drive circuit | |
| CN202949600U (en) | Anti-lightning type light emitting diode (LED) power supply | |
| CN101988674A (en) | LED two-sided direction signal lamp | |
| CN202103892U (en) | Driving power supply for LED street lamp | |
| CN204598401U (en) | A kind of LED touch dimmer power supply | |
| CN102111936B (en) | Light emitting diode (LED) driving power supply | |
| CN210120684U (en) | Driving circuit compatible with silicon controlled rectifier dimming and wireless dimming | |
| CN203340372U (en) | LED lamp driving power supply employing analog dimming | |
| CN206237643U (en) | A kind of linear constant current controls LED | |
| CN205510461U (en) | From LED drive device that adjusts luminance | |
| CN206136398U (en) | Durable drive power supply based on inquiry system terminal | |
| CN107426878B (en) | A kind of driving circuit for selecting LED to export electric current by jack |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180109 Termination date: 20191113 |