CN108601140A - A kind of controllable silicon light modulation LED drive circuit - Google Patents
A kind of controllable silicon light modulation LED drive circuit Download PDFInfo
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- CN108601140A CN108601140A CN201810394567.XA CN201810394567A CN108601140A CN 108601140 A CN108601140 A CN 108601140A CN 201810394567 A CN201810394567 A CN 201810394567A CN 108601140 A CN108601140 A CN 108601140A
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- controllable silicon
- resistance
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- circuit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Abstract
The invention discloses a kind of controllable silicon light modulation LED drive circuits, including controllable silicon dimmer, industrial frequency rectifying circuit module, Flyback constant voltage circuits, BUCK constant currents translation circuit, phase angle detection circuit and control circuit；Controllable silicon dimmer, for alternating current after line voltage pressure regulation, will to be exported to industrial frequency rectifying circuit module；Industrial frequency rectifying circuit module, for unidirectional DC voltage will to be exported after AC rectification to Flyback constant voltage circuits；Flyback constant voltage circuits export constant voltage to control circuit for carrying out active power factor correction to DC voltage；Phase angle detection circuit is used to detect the conduction phase angle of controllable silicon dimmer, outputs control signals to control circuit；Control circuit, the control signal of constant voltage and phase angle detection circuit output for being exported to Flyback constant voltage circuits is handled, the current reference signal to current control and adjusting is exported to BUCK constant current translation circuits, BUCK constant current translation circuits is made to realize the current constant control to output current and the adjusting to output current.
Description
Technical field
The present invention relates to technical field of LED illumination, especially a kind of controllable silicon light modulation LED drive circuit.
Background technology
Light emitting diode (Light Emitting Diode, LED) has energy-saving and environmental protection, long-life, specular removal, color
The features such as abundant, be the main direction of studying of the following green illumination.Due to the C-V characteristic and its negative temperature coefficient of LED, need
Corresponding driving power is designed so that illumination is applied.According to statistics, at present LED illumination lamp malfunction and failure the reason of, 70% or so
It is driving power.It can be seen that the quality of driving power is of great significance for the long-life of LED.LED industry it is quick
Development also accelerates the progress of light modulation industry.Light regulating technology can not only further save the energy, extend the service life of LED,
And visual effect can be improved, quality of making the life better.Silicon-controlled (TRIAC) light modulation occurred since the 1960s, closely
Entire illumination light modulation field has been dominated since half a century always.It is at low cost with compatible high, small, easy to operate etc.
Advantage firmly gets consumers.But traditional controllable silicon dimmer is mainly used for adjusting the brightness of incandescent lamp, halogen lamp etc., incandescent
Lamp and halogen lamp are all resistive loads, and TRIAC light modulators, which are directly accessed power supply, just can reach light modulation purpose.And for LED
This kind of non-resistance load, TRIAC light modulators directly meet people, and there may be the compatibling problem of light modulator and LED light, dimming process
In will appear light flash, oscillation the problems such as.
Conventional lights have resistive load characteristic, and it is PFC electricity to have the topology of resistive load characteristic in Switching Power Supply topology
Road, its dynamic response of single- stage PFC circuit is poor, to the relatively billow of rectification post filtering capacitor charging when can not eliminate controlled silicon conducting
Gush the inhibition of the concussion of electric current generation, and when angle of flow in every half of power frequency is identical and controlled silicon conducting required dimension
Hold electric current.The compatibling problem of LED drivers and controllable silicon dimmer is solved, realizes wider dimming scope, smooth light modulation
Journey fully achieves the silicon-controlled phase dimming of flicker free so that it is to perplex a disaster of industry that LED, which directly replaces conventional lamp,
Topic.
Increasing with the consumption of the energy, energy-efficient requirement is also higher and higher, and electric consumption on lighting is people's energy consumption
A pith.New LED illumination will replace traditional gas-discharge lamp as a kind of energy saving, green lighting system
And incandescent lamp.The long lifespan of LED, light efficiency is high, can save a large amount of electric energy, and driving and the control mode letter of LED
It is single, it is convenient for flexible modulation light emission luminance, is particularly suitable for some light emission luminance and needs the application being adjusted according to different situations,
Such as street lamp, the public arenas such as square and interior lighting system, when not needing 100% brightness of illumination, reduce brightness can
Save much electricity.Since LED power supplys are using efficient, wide-range input voltage AC/DC high frequency switch powers, tradition
Input voltage linear regulation or phase control can not adjust output voltage or electric current, cannot achieve the bright of LED lamps
Degree is adjusted.There are many driving circuits for using tunable optical at present：Some is dimmed in LED drivers using self-timing, i.e.,
Use as a lamp it is bright brightness is turned down after a certain period of time, this light adjusting circuit by built in LED lamps ambient brightness detection and timing adjust
The control of optical circuit is unable to flexibly control.Also there is one control circuit of addition in LED drivers, to receive control
The brightness of illumination of signal control LED, but such side is used in combination in the wireless signal or power carrier signal that device processed is sent out
Formula cost is higher, complex circuit, and reliability is low.
Invention content
A kind of controllable silicon light modulation LED drives are provided the technical problem to be solved by the present invention is to overcome the deficiencies in the prior art
Dynamic circuit, the present invention realize that wider dimming scope, smooth dimming process fully achieve the silicon-controlled phase dimming of flicker free.
The present invention uses following technical scheme to solve above-mentioned technical problem：
According to a kind of controllable silicon light modulation LED drive circuit proposed by the present invention, including controllable silicon dimmer, industrial frequency rectifying circuit mould
Block, Flyback constant voltage circuits, BUCK constant currents translation circuit, phase angle detection circuit and control circuit；
Controllable silicon dimmer, for alternating current after line voltage pressure regulation, will to be exported to industrial frequency rectifying circuit module；
Industrial frequency rectifying circuit module, for unidirectional DC voltage will to be exported after AC rectification to Flyback constant voltage circuits；
Flyback constant voltage circuits export constant voltage to controlling electricity for carrying out active power factor correction to DC voltage
Road；
Phase angle detection circuit is used to detect the conduction phase angle of controllable silicon dimmer, outputs control signals to control circuit；
The control of control circuit, the constant voltage and phase angle detection circuit output for being exported to Flyback constant voltage circuits is believed
It number is handled, exports the current reference signal to current control and adjusting to BUCK constant current translation circuits, make BUCK constant currents
Translation circuit realizes the current constant control to output current and the adjusting to output current, so that realizing the constant current control of LED
System and brightness regulation.
Scheme, phase angle detection circuit are advanced optimized as a kind of controllable silicon light modulation LED drive circuit of the present invention
Including 4N33 photoelectrical couplers, the first to the 6th resistance, zener diode and capacitance；Wherein, the first of 4N33 photoelectrical couplers
Pin is connect with one end of the 6th resistance, and the other end of the 6th resistance is connect with+12V power supplys, the third of 4N33 photoelectrical couplers
Pin is connect with+3.3V power supplys, and the 4th pin of 4N33 photoelectrical couplers is connect with one end of the 5th resistance, the 5th resistance it is another
One end is connected to ground, and the second pin of 4N33 photoelectrical couplers and the collector of triode connect, the emitter and ground of triode,
One end of capacitance, one end of first resistor, the 4th resistance one end be separately connected, the other end of capacitance and first resistor it is another
End, one end of second resistance, triode base stage be separately connected, the anode of the other end of second resistance and zener diode connects
It connects, the other end of the cathode of zener diode and one end of 3rd resistor, the 4th resistance is separately connected, the other end of 3rd resistor
It is connect with industrial frequency rectifying circuit module.
Scheme, first resistor and are advanced optimized as a kind of controllable silicon light modulation LED drive circuit of the present invention
The resistance value of two resistance is identical.
Scheme is advanced optimized as a kind of controllable silicon light modulation LED drive circuit of the present invention, triode is NPN tri-
Pole pipe.
Scheme, capacitance 10uF are advanced optimized as a kind of controllable silicon light modulation LED drive circuit of the present invention.
The present invention has the following technical effects using above technical scheme is compared with the prior art：
（1）The present invention provides the LED driving circuits of good dimming effect；
（2）The present invention realizes that wider dimming scope, smooth dimming process fully achieve the silicon-controlled phase dimming of flicker free.
Description of the drawings
Fig. 1 is the schematic diagram of the present invention.
Specific implementation mode
Technical scheme of the present invention is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of controllable silicon light modulation LED drive circuit, including controllable silicon dimmer, industrial frequency rectifying circuit module,
Flyback constant voltage circuits, BUCK constant currents translation circuit, phase angle detection circuit and control circuit；
Controllable silicon dimmer, for alternating current after line voltage pressure regulation, will to be exported to industrial frequency rectifying circuit module；
Industrial frequency rectifying circuit module, for unidirectional DC voltage will to be exported after AC rectification to Flyback constant voltage circuits；
Flyback constant voltage circuits export constant voltage to controlling electricity for carrying out active power factor correction to DC voltage
Road；
Phase angle detection circuit is used to detect the conduction phase angle of controllable silicon dimmer, outputs control signals to control circuit；
The control of control circuit, the constant voltage and phase angle detection circuit output for being exported to Flyback constant voltage circuits is believed
It number is handled, exports the current reference signal to current control and adjusting to BUCK constant current translation circuits, make BUCK constant currents
Translation circuit realizes the current constant control to output current and the adjusting to output current, so that realizing the constant current control of LED
System and brightness regulation.
Phase angle detection circuit includes 4N33 photoelectrical couplers, the first to the 6th resistance, zener diode and capacitance；Wherein,
First pin of 4N33 photoelectrical couplers is connect with one end of the 6th resistance, and the other end of the 6th resistance is connect with+12V power supplys,
The third pin of 4N33 photoelectrical couplers is connect with+3.3V power supplys, the 4th pin of 4N33 photoelectrical couplers and the 5th resistance
One end connects, and the other end of the 5th resistance is connected to ground, and the second pin of 4N33 photoelectrical couplers and the collector of triode connect
It connects, one end of the emitter and ground, one end of capacitance, one end of first resistor, the 4th resistance of triode is separately connected, capacitance
The other end and the other end of first resistor, one end of second resistance, triode base stage be separately connected, the other end of second resistance
It is connect with the anode of zener diode, the other end of the cathode of zener diode and one end of 3rd resistor, the 4th resistance is distinguished
Connection, the other end of 3rd resistor are connect with industrial frequency rectifying circuit module.
First resistor is identical with the resistance value of second resistance.Triode is NPN triode, capacitance 10uF.
The present invention provides the LED driving circuits of good dimming effect；The present invention realizes wider dimming scope, smoothly
Dimming process fully achieves the silicon-controlled phase dimming of flicker free.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, several simple deductions or replacement can also be made, all shall be regarded as belonging to the present invention's
Protection domain.
Claims (5)
1. a kind of controllable silicon light modulation LED drive circuit, which is characterized in that including controllable silicon dimmer, industrial frequency rectifying circuit module,
Flyback constant voltage circuits, BUCK constant currents translation circuit, phase angle detection circuit and control circuit；
Controllable silicon dimmer, for alternating current after line voltage pressure regulation, will to be exported to industrial frequency rectifying circuit module；
Industrial frequency rectifying circuit module, for unidirectional DC voltage will to be exported after AC rectification to Flyback constant voltage circuits；
Flyback constant voltage circuits export constant voltage to controlling electricity for carrying out active power factor correction to DC voltage
Road；
Phase angle detection circuit is used to detect the conduction phase angle of controllable silicon dimmer, outputs control signals to control circuit；
The control of control circuit, the constant voltage and phase angle detection circuit output for being exported to Flyback constant voltage circuits is believed
It number is handled, exports the current reference signal to current control and adjusting to BUCK constant current translation circuits, make BUCK constant currents
Translation circuit realizes the current constant control to output current and the adjusting to output current, so that realizing the constant current control of LED
System and brightness regulation.
2. a kind of controllable silicon light modulation LED drive circuit according to claim 1, which is characterized in that phase angle detection circuit packet
Include 4N33 photoelectrical couplers, the first to the 6th resistance, zener diode and capacitance；Wherein, the first of 4N33 photoelectrical couplers is drawn
Foot is connect with one end of the 6th resistance, and the other end of the 6th resistance is connect with+12V power supplys, and the third of 4N33 photoelectrical couplers is drawn
Foot is connect with+3.3V power supplys, and the 4th pin of 4N33 photoelectrical couplers is connect with one end of the 5th resistance, the 5th resistance it is another
End is connected to ground, and the second pin of 4N33 photoelectrical couplers and the collector of triode connect, emitter and ground, the electricity of triode
One end of appearance, one end of first resistor, the 4th resistance one end be separately connected, the other end of capacitance and first resistor it is another
End, one end of second resistance, triode base stage be separately connected, the anode of the other end of second resistance and zener diode connects
It connects, the other end of the cathode of zener diode and one end of 3rd resistor, the 4th resistance is separately connected, the other end of 3rd resistor
It is connect with industrial frequency rectifying circuit module.
3. a kind of controllable silicon light modulation LED drive circuit according to claim 1, which is characterized in that first resistor and second
The resistance value of resistance is identical.
4. a kind of controllable silicon light modulation LED drive circuit according to claim 1, which is characterized in that triode is tri- poles NPN
Pipe.
5. a kind of controllable silicon light modulation LED drive circuit according to claim 1, which is characterized in that capacitance 10uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810394567.XA CN108601140A (en) | 2018-04-27 | 2018-04-27 | A kind of controllable silicon light modulation LED drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810394567.XA CN108601140A (en) | 2018-04-27 | 2018-04-27 | A kind of controllable silicon light modulation LED drive circuit |
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| CN108601140A true CN108601140A (en) | 2018-09-28 |
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| CN201810394567.XA Pending CN108601140A (en) | 2018-04-27 | 2018-04-27 | A kind of controllable silicon light modulation LED drive circuit |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201467538U (en) * | 2009-07-20 | 2010-05-12 | 英飞特电子（杭州）有限公司 | LED driving circuit for controlled silicon dimming |
| US20160242255A1 (en) * | 2013-12-05 | 2016-08-18 | Ketra, Inc. | Linear LED Illumination Device with Improved Color Mixing |
| CN206977757U (en) * | 2017-07-12 | 2018-02-06 | 无锡迅驰电子科技有限公司 | High PF, the LED daylight lamp drive circuit without stroboscopic, doubleway output |
-
2018
- 2018-04-27 CN CN201810394567.XA patent/CN108601140A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201467538U (en) * | 2009-07-20 | 2010-05-12 | 英飞特电子（杭州）有限公司 | LED driving circuit for controlled silicon dimming |
| US20160242255A1 (en) * | 2013-12-05 | 2016-08-18 | Ketra, Inc. | Linear LED Illumination Device with Improved Color Mixing |
| CN206977757U (en) * | 2017-07-12 | 2018-02-06 | 无锡迅驰电子科技有限公司 | High PF, the LED daylight lamp drive circuit without stroboscopic, doubleway output |
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Application publication date: 20180928 |
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