CN107580396B - A kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency - Google Patents
A kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency Download PDFInfo
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Abstract
The present invention provides a kind of compatible silicon controlled linear LED drive circuits of light modulation of high efficiency, including silicon-controlled, rectifier bridge, the second detection resistance, diode, LED load, the first driving circuit, maintains current setting resistor and the second driving circuit at the first detection resistance；One end of biasing resistor and the inverting input terminal of second operational amplifier connect；The other end is connect with the source electrode of the second metal-oxide-semiconductor；One input of differential pressure conditioner terminates voltage difference transformer reference voltage, the tie point of another input termination the first detection resistance and the second detection resistance, and the inverting input terminal of output end and second operational amplifier connects.It the advantage is that by adjusting linearity light adjusting scheme control model, overall efficiency can be made to greatly improve, and provide maintenance electric current to be silicon-controlled, prevent LED from flashing.
Description
Technical field
The present invention relates to a kind of LED linear driving circuit, in particular to a kind of compatible silicon controlled linear LED of light modulation of high efficiency
Driving circuit.
Background technique
In recent years, high-brightness LED illumination with high photosynthetic efficiency, the long-life, high reliability and it is pollution-free the advantages that gradually take
For conventional light sources such as incandescent lamp, fluorescent lamps.In some applications, it may be desirable to the brightness of lamp light adjustable in some cases, so as to
Further energy conservation and the comfortable illumination of offer.Controllable silicon dimmer is applied for a long time in the light modulations such as traditional incandescent lamp illumination, and
Without changing wiring, installation cost is lower, and the performance and specification of various brands controllable silicon dimmer are not much different.
Now due to the rapid development of LED illumination, originally tens watts of incandescent lamp, the LED ball of several watts can be directly being used to steep
Lamp is instead of can thus save a large amount of energy.The dimming mode of incandescent lamp much uses controllable silicon dimmer to be cut
Phase angle light modulation.Conventional incandescent is due to being a purely resistive load, it is possible to directly carry out cut phase to it with controllable silicon dimmer
Angle light modulation.Since conventional incandescent is mostly tens to several hectowatts, the design of controllable silicon dimmer is designed as load
's.But if directly being dimmed to the LED light of several watts with this controllable silicon dimmer, born since LED light is not belonging to pure resistance
It carries, so the problems such as serious flashing can be brought.
According to the load characteristic of LED, a kind of controllable constant-current source is needed to control.Perseverance is realized using high frequency switch power
Flow control is a kind of common method.But while performance improves, cost is also greatly increased.
Compared with high frequency switch power, the advantages of linear low density scheme, mainly has: 1) eliminating input electrolytic capacitor, be electrolysed
The capacitor service life is the bottleneck of power source life, eliminates electrolytic capacitor, and the driving power service life just extends.2) circuit work is in power frequency
Linear model, rather than work in high frequency mode, eliminate high-frequency inductor, be not present EMI the problem of, eliminate EMC circuit.3
The peripheral cells such as high-frequency inductor are eliminated, are further reduced costs.
Linear low density drive scheme, being one cannot be neglected important selection.It is simple to be mainly characterized by route, only needs seldom
Peripheral cell can realize preferable constant-current dimming characteristic.The devices such as inductance, input capacitance are omitted compared to Switching Power Supply,
The LED constant current driving power source system of non-isolated compatible silicon controlled light modulator suitable for volume, cost requirement harshness.In cost declining
While, system reliability is provided, extends the service life of power supply, and realize higher PF.Simultaneously because line-down
In HF switch state, the route for solving the problems, such as EMI is also just omitted.This has met the trend of LED drive power simplification, will
Increasingly received by market.
Compared to switch dimming scheme, linear arrangement device is few, small in size, at low cost, so in MR16, GU10, or
It is generallyd use in the application of E12, E26 lamp cap small size.In addition, linear arrangement light modulation compatibility is high, dimming scope is wider, photochromic change
The features such as change is softer also starts to be widely used in bulb lamp tool etc..Linearity light adjusting scheme only problem is overall efficiency at present
Universal lower, this certainly will require to improve linear chip cooling condition, increase cost, and be not able to satisfy the hardness of some light efficiencies and refer to
Mark.
The actinic LED drive circuit of common thyristor regulating, as shown in Figure 1, driving circuit 1 is used to modulate LED load
Electric current Iout is exported, due to the presence of feedback loop, when input voltage vin is higher than LED load pressure drop VLed, driving circuit 1
It starts to work, then exports electric current and keep are as follows:
Driving circuit 2, which is used to provide to reverse-blocking tetrode thyristor, maintains electric current, and when Vin is less than Vled, driving circuit 1 cannot be defeated
Electric current out, due to the presence of feedback loop, driving circuit 2 is started to work, and then electric current is maintained to keep are as follows:
The power consumption PM2 of metal-oxide-semiconductor M2 are as follows:
When Vin is higher than Vled, driving circuit 2 is started to work, due to the presence of feedback loop, Vcs_1=Vcs_2=
Vref maintains electric current to be reduced to 0 at this time.It can thus be seen that driving circuit 2 is controllable when driving circuit 1 cannot export electric current
Silicon, which provides, maintains electric current, prevents LED from flashing.When driving circuit 1 can export electric current, driving circuit 2 does not work, and reduces chip
Power consumption.
From the above analysis as can be seen that when Vled is relatively high, power consumption meeting when driving circuit 2 works of metal-oxide-semiconductor M2
Become higher, to reduce the efficiency of whole system.
Summary of the invention
The present invention provides a kind of compatible silicon controlled linear LED drive circuits of light modulation of high efficiency, by adjusting linearity light adjusting
Scheme control model can be such that overall efficiency greatly improves, and provide maintenance electric current to be silicon-controlled, prevent LED from flashing；Overcome
The defect of the prior art solves above-mentioned technical problem.
The present invention provides a kind of compatible silicon controlled linear LED drive circuits of light modulation of high efficiency, including, silicon-controlled, rectification
Bridge, the second detection resistance R2, diode D1, LED load, the first driving circuit, maintains electric current setting electricity at the first detection resistance R1
Hinder Rcs_2 and the second driving circuit；First driving circuit includes the first metal-oxide-semiconductor M1, the first operational amplifier OTA1 and output electricity
Stream setting resistance Rcs_1；Second driving circuit includes, the second metal-oxide-semiconductor M2, second operational amplifier OTA2, biasing resistor Rct and
Differential pressure conditioner Y1；Input AC electricity ACin is connect by silicon-controlled with two input terminals of rectifier bridge；First detection resistance R1
After the second detection resistance R2 series connection, it is connect with two output ends of rectifier bridge；The anode of diode D1 is just defeated with rectifier bridge
The anode of outlet connection, cathode and LED load connects；The drain electrode of first metal-oxide-semiconductor M1 and the cathode of LED load connect；Output electricity
One end of stream setting resistance Rcs_1 is connect with the source electrode of the first metal-oxide-semiconductor M1, other end ground connection；First operational amplifier OTA1's
Normal phase input end is connect in reference voltage Vref connection, inverting input terminal with the source electrode of the first metal-oxide-semiconductor M1, output end and first
The grid of metal-oxide-semiconductor M1 connects；Maintain current setting resistor Rcs_2 one end connect with the source electrode of the first metal-oxide-semiconductor M1, the other end and
The source electrode of second metal-oxide-semiconductor M2 connects, and the drain electrode of the second metal-oxide-semiconductor M2 and the positive input terminal of rectifier bridge connect；Second operational amplifier
The normal phase input end of OTA2 meets reference voltage Vref, and output end is connect with the grid of the second metal-oxide-semiconductor M2；The one of biasing resistor Rct
End is connect with the inverting input terminal of second operational amplifier OTA2；The other end is connect with the source electrode of the second metal-oxide-semiconductor M2；Pressure difference transformation
An input of device Y1 terminates differential pressure conditioner reference voltage Vref_ct, another input the first detection resistance R1 of termination and the
The tie point of two detection resistance R2, output end are connect with the inverting input terminal of second operational amplifier OTA2；Differential pressure conditioner Y1
The imbalance pressure drop that electric current generates on biasing resistor Rct is exported by differential pressure conditioner to adjust the setting of the second driving circuit electric current
Voltage, so as to adjust silicon-controlled maintenance electric current.
Further, the present invention provides a kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, also have following
Feature: when rectifier output voltage Vin is less than LED load pressure drop, silicon-controlled maintenance electric current Is are as follows:
Wherein, Vcs_2 is that the second driving circuit electric current sets voltage.
Further, the present invention provides a kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, also have following
Feature: when differential pressure conditioner input voltage is less than or equal to differential pressure conditioner reference voltage, it is zero that differential pressure conditioner, which exports electric current,；
When differential pressure conditioner input voltage is greater than differential pressure conditioner reference voltage, differential pressure conditioner output electric current starts to increase.
Further, the present invention provides a kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, also have following
Feature: when differential pressure conditioner input voltage is less than or equal to differential pressure conditioner reference voltage Vref_ct, silicon-controlled holding circuit
Is are as follows:
Further, the present invention provides a kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, also have following
Feature: the reference voltage of differential pressure conditioner can be modulated.
Further, the present invention provides a kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, also have following
Feature: when differential pressure conditioner input voltage be greater than differential pressure conditioner reference voltage Vref_ct, and be less than differential pressure conditioner benchmark electricity
When pressing the sum of Vref_ct and differential pressure conditioner modulation voltage range Vrng, silicon-controlled holding circuit Is are as follows:
Further, the present invention provides a kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, also have following
Feature: one end of the first detection resistance R1 is connect with rectifier bridge negative output terminal, and the input terminal of the other end and differential pressure conditioner Y1 connect
It connects；One end of second detection resistance R2 and the positive output end of rectifier bridge connect, and the input terminal of the other end and differential pressure conditioner Y1 connect
It connects.
Further, the present invention provides a kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, also have following
Feature: the relationship of rectifier output voltage Vin and differential pressure conditioner input voltage V1 is Vin=V1*1+R2/R1.
Further, the present invention provides a kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, also have following
Feature: when the output voltage of rectifier bridge is optionally greater than LED load pressure drop, the first drive circuit works, the output electricity of LED load
Stream are as follows:
Wherein, Vcs_1 is the first driving circuit feedback loop voltage.
Detailed description of the invention
Fig. 1 is the actinic LED drive circuit of common thyristor regulating.
Fig. 1 appended drawing reference:
Iout-- LED load exports electric current
Vref-- reference voltage
ACin-- input ac voltage
Vin-- rectifier output voltage
The driving circuit feedback loop voltage of Vcs_1-- the first
The driving circuit electric current of Vcs_2-- the second sets voltage
Rcs_1-- exports current setting resistor
Rcs_2-- maintains current setting resistor
The metal-oxide-semiconductor of M1-- the first
The metal-oxide-semiconductor of M2-- the second
OTA-- operational amplifier
C1-- load capacitance
The silicon-controlled maintenance electric current of Is--
Fig. 2 is the compatible silicon controlled linear LED drive circuit figure of light modulation of high efficiency of the invention.
Fig. 2 appended drawing reference:
Rcs_1-- exports current setting resistor
Rcs_2-- maintains current setting resistor
Vref-- reference voltage
The driving circuit feedback loop voltage of Vinv-- the second
ACin-- input ac voltage
Vin-- rectifier output voltage
The driving circuit feedback loop voltage of Vcs_1-- the first
The driving circuit electric current of Vcs_2-- the second sets voltage
C1-- load capacitance
D1-- diode
The operational amplifier of OTA1-- the first
OTA2-- second operational amplifier
The metal-oxide-semiconductor of M1-- the first
The metal-oxide-semiconductor of M2-- the second
V1-- differential pressure conditioner input voltage
Y1-- differential pressure conditioner
Ict-- differential pressure conditioner exports electric current
Vref_ct-- differential pressure conditioner reference voltage
Rct-- biasing resistor
The silicon-controlled maintenance electric current of Is--
Iout-- LED load exports electric current
Fig. 3 is the adjustment curve of the second driving circuit electric current setting voltage.
Specific embodiment:
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 2 is the compatible silicon controlled linear LED drive circuit figure of light modulation of high efficiency of the invention.
As shown in Fig. 2, the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, comprising: silicon-controlled, rectifier bridge, first
Detection resistance R1, the second detection resistance R2, diode D1, LED load, load capacitance C1, the first driving circuit, electric current is maintained to set
Determine resistance Rcs_2 and the second driving circuit.
First driving circuit, comprising: the first metal-oxide-semiconductor M1, the first operational amplifier OTA1 and output current setting resistor
Rcs_1.Second driving circuit, comprising: the second metal-oxide-semiconductor M2, second operational amplifier OTA2, biasing resistor Rct and pressure difference transformation
Device Y1.
Input AC electricity ACin is connect by silicon-controlled with two input terminals of rectifier bridge.The negative output of rectifier bridge terminates
Ground.
One end of first detection resistance R1 is connect with rectifier bridge negative output terminal, the input terminal of the other end and differential pressure conditioner Y1
Connection.One end of second detection resistance R2 and the positive output end of rectifier bridge connect, the input terminal of the other end and differential pressure conditioner Y1
Connection.
The anode of diode D1 is connect with the positive output end of rectifier bridge, and the anode of cathode and LED load connects.First MOS
The drain electrode of pipe M1 and the cathode of LED load connect.Load capacitance C1 is connected in parallel on the both ends of LED load.
The normal phase input end of first operational amplifier OTA1 is in reference voltage Vref connection, inverting input terminal and the first MOS
The source electrode of pipe M1 connects, and output end is connect with the grid of the first metal-oxide-semiconductor M1.Export one end and the of current setting resistor Rcs_1
The source electrode of one metal-oxide-semiconductor M1 connects, other end ground connection.
One end of current setting resistor Rcs_2 is maintained to connect with the source electrode of the first metal-oxide-semiconductor M1, the other end and the second metal-oxide-semiconductor
The source electrode of M2 connects.The drain electrode of second metal-oxide-semiconductor M2 and the positive input terminal of rectifier bridge connect.The positive of second operational amplifier OTA2
Input termination reference voltage Vref, output end are connect with the grid of the second metal-oxide-semiconductor M2.One end of biasing resistor Rct and the second fortune
Calculate the inverting input terminal connection of amplifier OTA2；The other end is connect with the source electrode of the second metal-oxide-semiconductor M2.
An input of differential pressure conditioner Y1 terminates differential pressure conditioner reference voltage Vref_ct, another input termination the
The inverting input terminal of the tie point of one detection resistance R1 and the second detection resistance R2, output end and second operational amplifier OTA2 connect
It connects.
The working principle of the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency:
The compatible silicon controlled linear LED drive circuit of light modulation of a kind of high efficiency provided by the invention, the first driving circuit are used to
The output electric current Iout for modulating LED load, due to the presence of feedback loop, when rectifier output voltage Vin is higher than LED load pressure drop
When VLed, the first driving circuit is started to work, and LED load exports electric current and keeps are as follows:
Second driving circuit be used to reverse-blocking tetrode thyristor provide maintain electric current Is, differential pressure conditioner Y1, biasing resistor Rct and
Detection resistance R1, R2 is added into circuit structure.Wherein, the first detection resistance R1 and the second detection resistance R2 is used to perceive rectification
The size of output voltage Vin；Differential pressure conditioner Y1 then exports the imbalance pressure that electric current Ict is generated on biasing resistor Rct by it
Drop sets voltage Vcs_2 to change the second driving circuit electric current, to change silicon-controlled maintenance electric current Is.
When rectifier output voltage Vin is less than or equal to LED load pressure drop Vled, silicon-controlled maintenance electric current Is are as follows:
When rectifier output voltage Vin is increased, the raising of the input voltage V1 of differential pressure conditioner Y1 also equal proportion.Pressure difference becomes
Parallel operation exports electric current are as follows:
Ict=(V1-Vref_ct)×gm
Wherein, Vref_ct is differential pressure conditioner reference voltage, and gm is differential pressure conditioner transconductance value.
When differential pressure conditioner input voltage V1 is less than or equal to differential pressure conditioner reference voltage Vref_ct, differential pressure conditioner
Output electric current Ict be 0.When differential pressure conditioner input voltage V1 is more than or equal to differential pressure conditioner reference voltage Vref_ct, pressure
The output electric current Ict of poor converter starts to increase.
Due to the presence of feedback loop, the second driving circuit feedback loop voltage Vinv and reference voltage Vref keep one
It causes, therefore the second driving circuit electric current sets voltage are as follows:
Vcs_2=Vref-(V1-Vref_ct)·gm·Rct
By circuit parameter design, the value of gm*Rct be can be expressed as:
Wherein, Vrng is differential pressure conditioner voltage modulated range.
Therefore, Vcs_2 the second driving circuit electric current sets voltage are as follows:
As shown in figure 3, the working characteristics based on differential pressure conditioner, when differential pressure conditioner input voltage V1 is less than or equal to pressure difference
When converter reference voltage Vref_ct, Vcs_2=Vref；Silicon-controlled maintenance electric current Is are as follows:
When differential pressure conditioner input voltage V1 be higher than differential pressure conditioner reference voltage Vref_ct, and be less than differential pressure conditioner
When voltage modulated range Vrng+ differential pressure conditioner reference voltage Vref_ct, silicon-controlled maintenance electric current Is are as follows:
When differential pressure conditioner input voltage V1 is more than or equal to differential pressure conditioner voltage modulated range Vrng+ differential pressure conditioner base
When quasi- voltage Vref_ct, Vcs_2=0.
Since the variation of V1 represents the transformation of Vin, after V1 is higher than Vref_ct, Is starts to reduce, therefore metal-oxide-semiconductor
The power consumption of M2 declines with the rising of Vin.
Since Vin=V1*1+R2/R1 can be in different applicable cases by selecting the resistance value of different R1 and R2
Under not only improved the efficiency of system, but also provide maintenance electric current to be silicon-controlled, prevent LED from flashing.
It is preferred embodiment of the invention described in this specification, above embodiments are only to illustrate the present invention
Technical solution rather than limitation of the present invention.All those skilled in the art pass through logic analysis, reasoning under this invention's idea
Or the limited available technical solution of experiment, it all should be within the scope of the present invention.
Claims (9)
1. a kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency, it is characterised in that: including, silicon-controlled, rectifier bridge,
First detection resistance R1, the second detection resistance R2, diode D1, LED load, the first driving circuit, current setting resistor is maintained
Rcs_2 and the second driving circuit；
Wherein, the first driving circuit includes the first metal-oxide-semiconductor M1, the first operational amplifier OTA1 and output current setting resistor
Rcs_1；Second driving circuit includes the second metal-oxide-semiconductor M2, second operational amplifier OTA2, biasing resistor Rct and differential pressure conditioner
Y1；
Input AC electricity ACin is connect by silicon-controlled with two input terminals of rectifier bridge；
After first detection resistance R1 and the second detection resistance R2 series connection, it is connect with two output ends of rectifier bridge；
The anode of diode D1 is connect with the positive output end of rectifier bridge, and the anode of cathode and LED load connects；
The drain electrode of first metal-oxide-semiconductor M1 and the cathode of LED load connect；
One end of output current setting resistor Rcs_1 is connect with the source electrode of the first metal-oxide-semiconductor M1, other end ground connection；
The normal phase input end of first operational amplifier OTA1 is connect with reference voltage Vref, inverting input terminal and the first metal-oxide-semiconductor M1
Source electrode connection, output end connect with the grid of the first metal-oxide-semiconductor M1；
One end of current setting resistor Rcs_2 is maintained to connect with the source electrode of the first metal-oxide-semiconductor M1, the other end and the second metal-oxide-semiconductor M2's
Source electrode connection,
The drain electrode of second metal-oxide-semiconductor M2 and the positive input terminal of rectifier bridge connect；
The normal phase input end of second operational amplifier OTA2 meets reference voltage Vref, the grid company of output end and the second metal-oxide-semiconductor M2
It connects；
One end of biasing resistor Rct is connect with the inverting input terminal of second operational amplifier OTA2；The other end and the second metal-oxide-semiconductor M2
Source electrode connection；
An input of differential pressure conditioner Y1 terminates differential pressure conditioner reference voltage Vref_ct, and the voltage of the input terminal is pressure difference
Converter reference voltage；Another input termination the first detection resistance R1 and the second detection resistance R2 tie point, output end with
The inverting input terminal of second operational amplifier OTA2 connects, and the voltage of the input terminal is differential pressure conditioner input voltage V1；
Differential pressure conditioner Y1 exports the imbalance pressure drop that electric current generates on biasing resistor Rct by differential pressure conditioner to adjust second
Driving circuit electric current sets voltage, so as to adjust silicon-controlled maintenance electric current.
2. the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency as described in claim 1, it is characterised in that:
When rectifier output voltage Vin is less than LED load pressure drop, silicon-controlled maintenance electric current Is are as follows:
Wherein, Vcs_2 is that the second driving circuit electric current sets voltage.
3. the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency as claimed in claim 2, it is characterised in that:
When differential pressure conditioner input voltage is less than or equal to differential pressure conditioner reference voltage, it is zero that differential pressure conditioner, which exports electric current,；
When differential pressure conditioner input voltage is greater than differential pressure conditioner reference voltage, differential pressure conditioner output electric current starts to increase.
4. the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency as claimed in claim 3, it is characterised in that:
When differential pressure conditioner input voltage is less than or equal to differential pressure conditioner reference voltage Vref_ct, silicon-controlled maintenance electric current
Is are as follows:
5. the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency as claimed in claim 3, it is characterised in that: pressure difference becomes
The reference voltage of parallel operation can be modulated.
6. the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency as claimed in claim 5, it is characterised in that:
When differential pressure conditioner input voltage be greater than differential pressure conditioner reference voltage Vref_ct, and be less than differential pressure conditioner benchmark electricity
When pressing the sum of Vref_ct and differential pressure conditioner modulation voltage range Vrng, silicon-controlled maintenance electric current Is are as follows:
7. the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency as described in claim 1, it is characterised in that:
One end of first detection resistance R1 is connect with rectifier bridge negative output terminal, and the input terminal of the other end and differential pressure conditioner Y1 connect
It connects；
One end of second detection resistance R2 and the positive output end of rectifier bridge connect, and the input terminal of the other end and differential pressure conditioner Y1 connect
It connects.
8. the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency as claimed in claim 7, it is characterised in that: rectification is defeated
The relationship of voltage Vin and differential pressure conditioner input voltage V1 is Vin=V1*1+R2/R1 out.
9. the compatible silicon controlled linear LED drive circuit of light modulation of high efficiency as described in claim 1, it is characterised in that:
When the output voltage of rectifier bridge is optionally greater than LED load pressure drop, the first drive circuit works, the output electricity of LED load
Stream are as follows:
Wherein, Vcs_1 is the first driving circuit feedback loop voltage.
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| CN201710965572.7A CN107580396B (en) | 2017-10-17 | 2017-10-17 | A kind of compatible silicon controlled linear LED drive circuit of light modulation of high efficiency |
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| CN108901098B (en) * | 2018-05-29 | 2019-12-10 | 上海源微电子科技有限公司 | Linear LED drive circuit with replaceable working mode |
| CN109714869B (en) * | 2019-03-07 | 2021-07-16 | 无锡奥利杰科技有限公司 | Linear adjustment and dimming control circuit for LED illumination driving current |
| CN111901949A (en) * | 2020-08-17 | 2020-11-06 | 宁波石上天际能源有限公司 | Energy-saving system capable of realizing thermoelectric conversion backflow |
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| WO2014209009A1 (en) * | 2013-06-28 | 2014-12-31 | 주식회사 실리콘웍스 | Light-emitting diode lighting device and control circuit for same |
| CN106304512A (en) * | 2016-11-03 | 2017-01-04 | 成都锦瑞芯科技有限公司 | A kind of linear LED drive circuit for controllable silicon light modulation |
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| CN106912144A (en) * | 2017-04-06 | 2017-06-30 | 矽力杰半导体技术(杭州)有限公司 | LED drive circuit, circuit module and control method with controllable silicon dimmer |
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|---|---|---|---|---|
| WO2014209009A1 (en) * | 2013-06-28 | 2014-12-31 | 주식회사 실리콘웍스 | Light-emitting diode lighting device and control circuit for same |
| CN105340367A (en) * | 2013-06-28 | 2016-02-17 | 硅工厂股份有限公司 | Light-emitting diode lighting device and control circuit for same |
| CN106332374A (en) * | 2016-10-26 | 2017-01-11 | 杰华特微电子（杭州）有限公司 | Bleeder circuit and method for controlling bleeder current and LED control circuit |
| CN106304512A (en) * | 2016-11-03 | 2017-01-04 | 成都锦瑞芯科技有限公司 | A kind of linear LED drive circuit for controllable silicon light modulation |
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