CN203086786U - Leakage circuit, silicon controlled rectifier light modulation circuit and LED lighting device - Google Patents

Abstract

The utility model relates to a leakage circuit, a silicon controlled rectifier light modulation circuit provided with the leakage circuit, and an LED lighting device. According to the utility model, one end of the leakage circuit is connected with an AC power supply by a rectifier unit, and the other end is connected with a controller. The leakage circuit comprises a voltage stabilization unit, a switch unit, a switch control unit, and a reverse direction cut-off unit. The voltage stabilization unit is connected between an output end of the rectifier unit and the switch unit. One end of the switch control unit is connected with a control end of the controller, and the other end is connected with the switch unit. A voltage source end of the controller is connected with the switch unit by the reverse direction cut-off unit. When the temperature is lower than the predetermined temperature, the switch unit is provided with a double positive temperature coefficient characteristic. The leakage circuit also comprises a compensation unit used for compensation of the double positive temperature coefficient characteristic, and the compensation unit comprises at least a variable resistor connected between the voltage stabilization unit and the ground.

Description

Leadage circuit and controllable silicon light modulation circuit and LED lighting device

Technical field

The utility model relates to a kind of leadage circuit.In addition, the utility model also relates to a kind of controllable silicon light modulation circuit and a kind of LED lighting device with leadage circuit of the above-mentioned type.

Background technology

At present, widely used leadage circuit is in low temperature environment in controllable silicon light modulation LED lighting device, for example-20 ℃, can produce so-called pair of ptc characteristics because of the negative temperature coefficient feature of the ptc characteristics of its voltage stabilizing didoe and its field effect transistor, it causes the controller of dimmer can't obtain normal starting resistor.

Propose in the solution of prior art, the Zener voltage that increases the Zener diode in the leadage circuit guarantees that field effect transistor produces enough big reference voltage, starts to guarantee controller.Reference voltage can continue greater than the supply power voltage of assisting winding to provide, and makes the field effect transistor continuous firing burn in hypersaturated state and overheated causing but meanwhile.For example, when input voltage is 230V, the drain voltage mean value of field effect transistor is 146V, source voltage is 12V, the current sinking of supposing the voltage source of controller is 1mA, then the consumed power on the field effect transistor is 13.4W, but the maximum power of the 1N60MOS metal oxide semiconductor transistor (metal-oxide-semiconductor) of general T0-251 encapsulation is 1W, so field effect transistor can be easy to burn.So, for fear of above-mentioned situation, need increasing auxiliary winding supply power voltage and additionally add a linear pressure limiting circuit and reduce and limit auxiliary winding supply power voltage, this just makes circuit cost strengthen and the efficient reduction.

Propose in another solution of prior art, add a Zener diode with negative temperature coefficient feature and former Zener diode and be connected in series and solve the problem that so-called pair of ptc characteristics brought.Because the nonlinear temperature characteristic that the change in voltage scope is less and it had of the Zener diode that is added in this technology, institute so that design starts the required temperature curve of dimmer and the auxiliary winding supply power voltage of restriction in low temperature environment comparatively difficult.

The utility model content

For solving the problems of the technologies described above, the utility model provides a kind of novel leadage circuit, and this leadage circuit at low temperatures can be reliably for controller provides starting resistor, and it is simple in structure, and is with low cost.In addition, the utility model also relates to a kind of controllable silicon light modulation circuit and a kind of LED lighting device with this controllable silicon light modulation circuit with leadage circuit of the above-mentioned type.

First purpose of the present utility model realizes by a kind of like this leadage circuit, and promptly an end of this leadage circuit is connected to AC power by rectification unit and the other end is connected to controller, and wherein, leadage circuit comprises: voltage regulation unit; Switch element; Switch control unit; And oppositely by the unit, wherein, voltage regulation unit is connected between the output and switch element of rectification unit, one end of switch control unit connects the control end of controller, the other end is connected to switch element, and the voltage source end of controller is by oppositely being connected to switch element by the unit, wherein, when being lower than default temperature, produce two ptc characteristics on the switch element.In addition, also comprise the compensating unit that two ptc characteristics are compensated according to leadage circuit of the present utility model, this compensating unit comprises at least one variable resistor that is connected between voltage regulation unit and the ground.

In design of the present utility model, compensating unit by adding at least one variable resistor be connected between voltage regulation unit and the ground simply to realize to this leadage circuit at low temperatures with being connected in parallel to each other, for example-20 ℃ two ptc characteristics that occurred compensate, avoided the field effect transistor in the leadage circuit because the voltage of its reference electrode increases, and continue to cause oppositely by the lasting conducting in unit greater than the supply power voltage of auxiliary winding, make field effect transistor be operated in hypersaturated state always and cause it overheated and burn, thereby make according to leadage circuit of the present utility model when guaranteeing low-cost and high reliability, normal starting resistor can also be provided for the controller in the controllable silicon light modulation circuit.

In according to a preferred design of the present utility model, variable resistor is a negative temperature coefficient resister, this negative temperature coefficient resister has along with temperature its resistance that descends is the characteristic that exponential relationship increases, at room temperature the change in resistance scope is big for it, between 100 Europe to 1000 kilo-ohm, its precision height with and temperature coefficient change Zener diode variation more used in the prior art greatly, and it has avoided the nonlinear temperature variation characteristic of Zener diode, thereby make that to design the required temperature curve of starting resistor and the auxiliary winding supply power voltage of restriction more or less freely, and guaranteed the good controllability of leadage circuit and high reliability.

Preferably, compensating unit comprises that also resistance limits subelement, and variable resistor limits subelement by resistance and is connected between voltage regulation unit and the ground.Advantageously, resistance limits subelement and comprises connection first fixed resistance and second fixed resistance with being one another in series, and wherein, a variable-resistance end is connected between first fixed resistance and second fixed resistance, other end ground connection.Because the utility model has adopted negative temperature coefficient resister to compensate two ptc characteristics, therefore is necessary the minimum and maximum resistance of negative temperature coefficient resister is limited, thereby makes that circuit can operate as normal.That is to say, after being connected in parallel, the negative temperature coefficient resister and first fixed resistance be connected in series with second fixed resistance again, by designing the predetermined resistance of first and second fixed resistances, thereby limit the minimum and maximum resistance of compensating unit, make that the compensating unit controllability is higher.

Preferably, voltage regulation unit comprises at least one the 3rd fixed resistance and first diode, and an end of the 3rd fixed resistance is connected to the output of rectification unit, and the other end connects the negative pole of first diode, and the positive pole of this first diode is connected to compensating unit.Advantageously, voltage regulation unit comprises three the 3rd fixed resistances that are one another in series and connect.In this voltage regulation unit, because single fixed resistance voltage endurance capability is limited, so this voltage regulation unit can adopt three wholesale fixed resistance and voltage stabilizing didoes that connect that are one another in series to be connected in series, constitute linear voltage-stabilizing circuit, these fixed resistances carry out current limliting and provide electric current to voltage stabilizing didoe this leadage circuit, make it work in stable state.

Preferably, switch element comprises the first transistor, the 4th fixed resistance, the control electrode of the first transistor connects between the negative pole of the 3rd fixed resistance and first diode, the work electrode of the first transistor connects the output of rectification unit, and the reference electrode of the first transistor is connected to ground by the 4th fixed resistance, the 4th fixed resistance make the first transistor can be behind circuit start conducting successfully and continue to remain on the amplification operating state.

Advantageously, switch control unit comprises the 5th fixed resistance, transistor seconds, the work electrode of transistor seconds is connected to the reference electrode of the first transistor by the 5th fixed resistance, the reference electrode of transistor seconds is connected to ground, and the control electrode of transistor seconds is connected to the control end of controller.In design of the present utility model, transistor seconds is the switch of controlled discharge, guarantee only when controllable silicon is closed, to open the drainage function of leadage circuit, and by regulating the size of the 5th fixed resistance, thereby regulate the size of leakage current, thereby guarantee the controllability and the reliability of this leadage circuit.

In the utility model proposes, oppositely comprise second diode by the unit, the positive pole of this second diode connects the reference electrode of the first transistor, and the negative pole of second diode connects the voltage source end of controller.Should oppositely prevent by the unit that electric current slave controller one side from oppositely flowing back to the reference electrode of the first transistor and preventing that the voltage of voltage source end from being dragged down by the 5th fixed resistance, and then make leadage circuit be able to trouble-free operation.

Second purpose of the present utility model realizes by a kind of controllable silicon light modulation circuit, this controllable silicon light modulation circuit comprises rectification unit and the controller that is connected to AC power, and the leadage circuit of the above-mentioned type, an end of this leadage circuit is connected to AC power by rectification unit and the other end is connected to controller.This controllable silicon light modulation circuit has the advantage of startability still good in low temperature environment and controllability and high reliability.

According to the utility model proposes, the controllable silicon light modulation circuit also comprises power supply unit, and the output of this power supply unit is connected to the voltage source end of controller.This power supply unit guarantees to provide for controller fully independently after controller normally starts the electric energy of normal operation.

Preferably, power supply unit comprises that the 3rd diode, the 6th fixed resistance, first capacitor and transformer assist winding, the auxiliary winding of this transformer is connected to the positive pole of the 3rd diode by the 6th fixed resistance, and the negative pole of the 3rd diode is connected to the voltage source end of controller, and first capacitor is connected between the voltage source end and ground of controller.This power supply unit provides to controller stablizes level and smooth electric energy, guarantees the job stability of controllable silicon light modulation circuit.

According to the utility model proposes, the controllable silicon light modulation circuit also comprises the output filter unit, and this unit is connected between the output and load of rectification unit, and this output filter unit is guaranteed to provide to load and stablized level and smooth electric current, impels loaded work piece stable.

Advantageously, this output filter unit comprises the 4th diode and second capacitor, output and negative pole that the positive pole of the 4th diode is connected to rectification unit connect described load, and an end of second capacitor is connected between the negative pole of the 4th diode and the load and the other end is connected to ground.

Last purpose of the present utility model realizes that by a kind of LED lighting device this LED lighting device comprises the controllable silicon light modulation circuit of the above-mentioned type.Also can normally start at low temperatures according to LED lighting device of the present utility model, and realize dimming function, simultaneously its compact conformation, cost is low, reliability is high.

It should be understood that if there is not other dated especially the feature of different exemplary embodiment described herein can be bonded to each other.

Description of drawings

Accompanying drawing constitutes the part of this specification, is used to help further understand the utility model.These accompanying drawings illustrate embodiment of the present utility model, and are used for illustrating principle of the present utility model with specification.Identical in the accompanying drawings parts are represented with identical label.Shown in the figure:

Fig. 1 shows the module map that includes according to the controllable silicon light modulation circuit of leadage circuit of the present utility model.

Fig. 2 shows the physical circuit figure of the controllable silicon light modulation circuit shown in Fig. 1.

Embodiment

Fig. 1 shows the module map that includes according toleadage circuit 100 controllable silicon light modulation circuit of the present utility model of the present utility model.As shown in Figure 1, this controllable silicon light modulation circuit comprises therectification unit 200 that is connected to AC power AC,leadage circuit 100,controller 300, as thefilter unit 500 of back level power supply circuits, and comprises thepower supply unit 400 to controller 300 power supplies.From Fig. 1 further as seen, the input ofrectification unit 200 is connected to AC power AC, output is respectivelyleadage circuit 100 andfilter unit 500 provides VD,filter unit 500 then is connected to the load of LED lighting device by DC-DC constant-current circuit (not shown), for example as the led chip of light source.In addition,leadage circuit 100 is connected withcontroller 300, andcontroller 300 is opened the drainage function ofleadage circuit 100 when controllable silicon is closed, makesleadage circuit 100 provide normal starting resistor forcontroller 300.

Fig. 2 shows the physical circuit figure of the controllable silicon light modulation circuit shown in Fig. 1.As seen from the figure,leadage circuit 100 also further comprises voltage regulation unit 1,switch element 2,switch control unit 3 and oppositelyends unit 4 and compensating unit 5.Voltage regulation unit 1 is connected between the output andswitch element 2 ofrectification unit 200, one end ofswitch control unit 3 connects the control end ofcontroller 300, the other end is connected toswitch element 2, and the voltage source end Vcc ofcontroller 300 is by oppositely being connected to switchelement 2 byunit 4.

In addition, from Fig. 2 further as seen, voltage regulation unit 1 comprises at least one the 3rd fixed resistance R3, R3 ', R3 " with the first diode D1; wherein; the 3rd fixed resistance R3, R3 ', R3 " a end is connected to the output ofrectification unit 200, the other end is connected to the negative pole of the first diode D1, and the positive pole of the first diode D1 is connected to compensating unit 5.In the present embodiment, voltage regulation unit 1 comprises three the 3rd fixed resistance R3 that are one another in series and connect, R3 ', R3 ".In this voltage regulation unit 1, because single fixed resistance voltage endurance capability is limited, so this voltage regulation unit 1 can adopt three wholesale fixed resistances (for example resistance 1000K) that connect that are one another in series to be connected in series with the first diode D1, constitute linear voltage-stabilizing circuit, these fixed resistances carry out current limliting and provide electric current to voltage stabilizing didoe this leadage circuit, make it work in stable state.Certainly, also can adopt the fixed resistance of other quantity to be one another in series.

Switch element 2 comprises the first transistor Q1, the 4th fixed resistance R4, wherein, the control electrode of the first transistor Q1 is connected the 3rd fixed resistance R3, R3 ', R3 is " and between the negative pole of the first diode D1; the work electrode of the first transistor Q1 connects the output ofrectification unit 200, and the reference electrode of the first transistor Q1 is connected to ground by the 4th fixed resistance R4.

Switch control unit 3 comprises the 5th fixed resistance R5, transistor seconds Q2, the work electrode of transistor seconds Q2 is connected to the reference electrode of the first transistor Q1 by the 5th fixed resistance R5, the reference electrode of transistor seconds Q2 is connected to ground, and the control electrode of transistor seconds Q2 is connected to the control end of controller 300.In addition, oppositely comprise the second diode D2 byunit 4, the positive pole of the described second diode D2 connects the reference electrode of the first transistor Q1, and the negative pole of the second diode D2 is connected to the voltage source end Vcc of controller 300.In design of the present utility model, oppositely adopted simple second a diode D2 to realize the reverse of electric current, but in other embodiment, also can adopt other circuit to realize that this is oppositely by function by function byunit 4.

The utility model core is thatleadage circuit 100 also comprises compensating unit 5, and this compensating unit 5 comprises at least one the variable resistor NTC and the first fixed resistance R1 that is connected between voltage regulation unit 1 and the ground with being connected in parallel to each other.This variable resistor NTC is designed to adjust according to variation of temperature the negative temperature coefficient resister NTC of the size of its resistance.This negative temperature coefficient resister has along with temperature its resistance that descends is the characteristic that exponential relationship increases.In addition, compensating unit 5 comprises that also resistance limitssubelement 51, variable resistor NTC limitssubelement 51 by described resistance and is connected between voltage regulation unit 1 and the ground, wherein,resistance limits subelement 51 and comprises the first fixed resistance R1 and the second fixed resistance R2 that connects with being one another in series, wherein, the end of variable resistor NTC is connected between the first fixed resistance R1 and the second fixed resistance R2, other end ground connection.This first and second fixed resistance R1, R2 can limit the minimum and maximum resistance value of compensating unit 5 according to predetermined design.

In addition, as shown in Figure 2, this controllable silicon light modulation circuit also comprisesrectification unit 200,power supply unit 400 andoutput filter unit 500.

Rectification unit 200 comprises the unidirectional full-wave rectification bridge that is made of four diode bridge joints as seen from the figure, and its AC power with input converts the driving voltage with half wave rectification wave toleadage circuit 100 inputs to.In addition, thepower supply unit 400 of working voltage is provided forcontroller 300, thispower supply unit 400 comprises that the 3rd diode D3, the 6th fixed resistance R6, the first capacitor C1 and transformer assist winding W, wherein, the auxiliary winding W of transformer is connected to the positive pole of the 3rd diode D3 by the 6th fixed resistance R6, and the negative pole of the 3rd diode D3 is connected to the voltage source end Vcc ofcontroller 300, and the first capacitor C1 is connected between the voltage source end Vcc and ground of controller 300.Output filter unit 500 is connected between the output of describedrectification unit 200 and the load and comprises the 4th diode D4 and the second capacitor C2, wherein, output and negative pole that the positive pole of the 4th diode D4 is connected torectification unit 200 are connected to load, and the end of the second capacitor C2 is connected between the negative pole of the 4th diode D4 and the load and the other end is connected to ground.

Next specifically describe operation principle according to controllable silicon light modulation circuit of the present utility model.When input driving voltage and circuit start, by three fixed resistance R3 that are one another in series and connect, R3 ', R3 " and the voltage regulation unit 1 of the linear voltage-stabilizing circuit formed of the back of connecting with the first diode D1 is stabilized in the voltage of the control electrode of the first transistor Q1 in theswitch element 2 burning voltage of the first diode D1; and make the first transistor Q1 conducting in conjunction with the 4th fixed resistance R4 as the below-center offset resistance of transistor Q1 in theswitch element 2; and the first capacitor C1 in thepower supply unit 400 charged; thereby make the first transistor Q1 be operated under the magnifying state; in the process of first capacitor C1 charging;controller 300 begins to start, thereby the auxiliary winding W voltage of transformer begins to rise, and give the first capacitor C1 charging, when the voltage on the first capacitor C1 surpasses the reference electrode voltage that the first transistor Q1 is provided in theswitch element 2, the power supply ofcontroller 300 oppositely transfers to and ending, so will be provided bypower supply unit 400 fully byunit 4.

In the present embodiment, the first transistor Q1 has adopted the metal oxide semiconductor transistor (metal-oxide-semiconductor) of the 1N60 model of a T0-251 encapsulation, but different with this embodiment is that this metal-oxide-semiconductor also can be substituted by high-voltage MOS pipe or triode commonly used such as 2N60,1N65 or 2N65.

In addition, the problem of bringing for the described pair of ptc characteristics before solving that enough starting resistor can't be provided to controller 300 in low temperature environment, in this embodiment, a compensating unit 5 is added in theleadage circuit 100, and with voltage regulation unit 1 be connected in series the back ground connection, this compensating unit 5 has a fixed resistance R1 who is connected in parallel with each other and negative temperature coefficient resister NTC, and fixed resistance R2 who connects with it, this negative temperature coefficient resister NTC has compensated the ptc characteristics that the first transistor Q1 is had in theswitch element 2, and have a resistance variation characteristic bigger than the excursion of voltage stabilizing didoe, than voltage stabilizing didoe different linear change characteristic.After adding this compensating unit 5, in low temperature environment, for example-20 ℃, the voltage VB that provided greater thanpower supply unit 400 can be provided the voltage VA of the reference electrode of the first transistor Q1 in theswitch element 2, thereby oppositely by no longer conducting ofunit 4, the first transistor Q1 can be because of continuous firing in hypersaturated state and overheated burning.

In the present embodiment, used the switch control unit of being made up of the 5th fixed resistance R5 andtransistor seconds Q2 3, this unit forms switch, and guarantees only just to open when controllable silicon is closed the leadage circuit function.The 5th fixed resistance R5 has the effect of regulating leakage current, and its value is more little, and leakage current is big more, but the loss of circuit also can be big more.

Different with this embodiment is that it is low pressure metal-oxide-semiconductor or triodes such as 2N7002, BC817 or 2N2222 that transistor seconds Q2 can adopt model.

Power to controller 300 by thepower supply unit 400 that the auxiliary winding W of the first capacitor C1, the 3rd diode D3, the 6th fixed resistance R6 and transformer is formed, the 3rd diode D3 provides the forward voltage of charging to the first capacitor C1, and the 6th fixed resistance R6 is a current-limiting resistance, is used for the electric current that pulse spike voltage that the auxiliary winding W of limiting transformer may exist produces.The effect that this first capacitor C1 also has shunt capacitance simultaneously is used for providing level and smooth and stable voltage to the voltage source end Vcc ofcontroller 300.

In this embodiment, as thefilter unit 500 of back level power supply circuits, be made up of the 4th diode D4 and the second capacitor C2, the 4th diode D4 is in order to prevent capacitive energy among the second capacitor C2 and to be released byleadage circuit 100 and being provided with.

Be preferred embodiment of the present utility model only below, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes and variation.All any modifications of within spirit of the present utility model and principle, being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Reference number

1 voltage regulation unit

2 switch elements

3 switch control units

4 oppositely by the unit

5 compensating units

51 resistances limit subelement

R1 first fixed resistance

R2 second fixed resistance

R3, R3 ', R3 " the 3rd fixed resistance

R4 the 4th fixed resistance

R5 the 5th fixed resistance

R6 the 6th fixed resistance

C1 first capacitor

C2 second capacitor

The Q1 the first transistor

The Q2 transistor seconds

D1 first diode

D2 second diode

D3 the 3rd diode

The NTC variable resistor

The AC AC power

100 leadage circuits

200 rectification units

300 controllers

400 power supply units

500 output filter units.

Claims (15)

1. a leadage circuit (100), an end of described leadage circuit (100) is connected to AC power by rectification unit (200) and the other end is connected to controller (300),

Described leadage circuit comprises: voltage regulation unit (1); Switch element (2); Switch control unit (3); And oppositely by unit (4),

Wherein, described voltage regulation unit, (1) is connected described rectification unit, (200) output and described switch element, (2) between, described switch control unit, (3) a end connects described controller, (300) control end, the other end is connected to described switch element, (2), described controller, (300) voltage source end, (Vcc) by the described unit that oppositely ends, (4) be connected to described switch element, (2), wherein, when being lower than default temperature, described switch element, (2) go up the two ptc characteristics of generation

It is characterized in that,

Described leadage circuit (100) also comprises the compensating unit (5) that described pair of ptc characteristics compensated, and described compensating unit (5) comprises at least one variable resistor (NTC) that is connected between described voltage regulation unit (1) and the ground.

2. leadage circuit according to claim 1 (100) is characterized in that, described variable resistor (NTC) is negative temperature coefficient resister (NTC).

3. leadage circuit according to claim 2 (100), it is characterized in that, described compensating unit (5) comprises that also resistance limits subelement (51), and described variable resistor (NTC) limits subelement (51) by described resistance and is connected between described voltage regulation unit (1) and the ground.

4. leadage circuit according to claim 2 (100), it is characterized in that, described resistance limits subelement (51) and comprises first fixed resistance (R1) and second fixed resistance (R2) that connects with being one another in series, wherein, one end of described variable resistor (NTC) is connected between described first fixed resistance (R1) and described second fixed resistance (R2), other end ground connection.

5. according to each described leadage circuit (100) in the claim 1 to 4, it is characterized in that, described voltage regulation unit (1) comprises at least one the 3rd fixed resistance (R3, R3 ', R3 ") and first diode (D1); wherein; (end of R3; R3 '; R3 ") is connected to the output of described rectification unit (200) to described the 3rd fixed resistance, the other end is connected to the negative pole of described first diode (D1), and the positive pole of described first diode (D1) is connected to described compensating unit (5).

6. leadage circuit according to claim 5 (100) is characterized in that, described voltage regulation unit (1) comprises three described the 3rd fixed resistance (R3, R3 ', the R3 ") that are one another in series and connect.

7. leadage circuit according to claim 5 (100), it is characterized in that, described switch element (2) comprises the first transistor (Q1), the 4th fixed resistance (R4), wherein, the control electrode of described the first transistor (Q1) is connected described the 3rd fixed resistance (R3, R3 ', between the negative pole of R3 ") and described first diode (D1); the work electrode of described the first transistor (Q1) connects the output of described rectification unit (200), and the reference electrode of described the first transistor (Q1) is connected to ground by described the 4th fixed resistance (R4).

8. leadage circuit according to claim 7 (100), it is characterized in that, described switch control unit (3) comprises the 5th fixed resistance (R5), transistor seconds (Q2), the work electrode of described transistor seconds (Q2) is connected to the reference electrode of described the first transistor (Q1) by described the 5th fixed resistance (R5), the reference electrode of described transistor seconds (Q2) is connected to ground, and the control electrode of described transistor seconds (Q2) is connected to the control end of described controller (300).

9. leadage circuit according to claim 7 (100), it is characterized in that, the described unit (4) that oppositely ends comprises second diode (D2), the positive pole of described second diode (D2) connects the reference electrode of described the first transistor (Q1), and the negative pole of described second diode (D2) is connected to the voltage source end (Vcc) of described controller (300).

10. controllable silicon light modulation circuit, comprise: the rectification unit (200) and the controller (300) that are connected to AC power, it is characterized in that, described controllable silicon light modulation circuit also comprises according to each described leadage circuit (100) in the claim 1 to 9, wherein, an end of described leadage circuit (100) is connected to AC power by rectification unit (200) and the other end is connected to controller (300).

11. controllable silicon light modulation circuit according to claim 10, it is characterized in that, described controllable silicon light modulation circuit also comprises power supply unit (400), and the output of wherein said power supply unit (400) is connected to the voltage source end (Vcc) of described controller (300).

12. controllable silicon light modulation circuit according to claim 11, it is characterized in that, described power supply unit (400) comprises the 3rd diode (D3), the 6th fixed resistance (R6), first capacitor (C1) and transformer are assisted winding (W), wherein, described transformer assists winding (W) to be connected to the positive pole of described the 3rd diode (D3) by described the 6th fixed resistance (R6), and the negative pole of described the 3rd diode (D3) is connected to the voltage source end (Vcc) of described controller (300), and described first capacitor (C1) is connected between the voltage source end (Vcc) and ground of described controller (300).

13. controllable silicon light modulation circuit according to claim 11, it is characterized in that, described controllable silicon light modulation circuit also comprises output filter unit (500), and wherein said output filter unit (500) is connected between the output and load of described rectification unit (200).

14. controllable silicon light modulation circuit according to claim 13, it is characterized in that, described output filter unit (500) comprises the 4th diode (D4) and second capacitor (C2), wherein, output and negative pole that the positive pole of described the 4th diode (D4) is connected to described rectification unit (200) are connected to described load, and an end of described second capacitor (C2) is connected between the negative pole of described the 4th diode (D4) and the described load and the other end is connected to ground.

15. a LED lighting device is characterized in that, described LED lighting device comprises according to each described controllable silicon light modulation circuit in the claim 10 to 14.

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