CN204168548U - LED adjusting control circuit - Google Patents
LED adjusting control circuit Download PDFInfo
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- CN204168548U CN204168548U CN201420602690.3U CN201420602690U CN204168548U CN 204168548 U CN204168548 U CN 204168548U CN 201420602690 U CN201420602690 U CN 201420602690U CN 204168548 U CN204168548 U CN 204168548U
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Abstract
The utility model discloses a kind of LED adjusting control circuit, it comprises filtration module, voltage reduction module, dimming controlling module and light modulation driver module; Described filtration module comprises the input and output that are connected with DC power anode; Described voltage reduction module comprises the input and output that are connected with described filtration module output; Described dimming controlling module comprises the first input end be connected with described filtration module output, the second input be connected with described voltage reduction module output and output; Described light modulation driver module comprises the input be connected with described dimming controlling module output and the output be connected with LED.Its beneficial effect is: the utility model can not produce noise in the process controlling the change of LED light and shade, there will not be scintillation, LED is not easy to burn out, and greatly improves the useful life of LED, reduce cost, meet the user demand of people.
Description
Technical field
The utility model relates to LED technical field, especially relates to a kind of LED adjusting control circuit.
Background technology
Along with the application of LED is more and more extensive, people also more and more present diversified demand to its requirement of applying, particularly under more and more focusing on the overall situation of environmental protection and energy saving now, people wish to spend minimum money, obtain the lighting solutions of most environmental protection, the application of therefore LED light modulation is also just more and more extensive.Controllable silicon dimmer is mostly adopted to carry out light modulation to LED light modulation at present, but controllable silicon dimmer in use can produce noise, and when the power of controllable silicon dimmer is less than certain value, LED can be glimmered, easily burn out LED, reduce the useful life of LED.
Utility model content
The purpose of this utility model is the deficiency effectively overcoming above-mentioned technology, provide a kind of LED adjusting control circuit, can not produce noise in dimming process, and LED can not be glimmered in dimming process, improve the useful life of LED.
The technical solution of the utility model is achieved in that it comprises filtration module, voltage reduction module, dimming controlling module and light modulation driver module;
Described filtration module comprises the input and output that are connected with DC power anode, and described filtration module is used for the clutter filtering of described DC power supply, for described voltage reduction module, dimming controlling module and light modulation driver module provide burning voltage;
Described voltage reduction module comprises the input and output that are connected with described filtration module output, and described voltage reduction module is used for the rated operational voltage voltage that described filtration module exports being reduced to described dimming controlling module;
Described dimming controlling module comprises the first input end be connected with described filtration module output, the second input be connected with described voltage reduction module output and output, and described dimming controlling module is for controlling the power supply of described voltage reduction module, the switch of dimming drive power and the size for controlling the voltage signal to described light modulation driver module output;
Described light modulation driver module comprises the input be connected with described dimming controlling module output and the output be connected with LED, the size that described light modulation driver module is used for the voltage signal exported according to described dimming controlling module controls the voltage swing of driving LED lamp, to control the light and shade change of LED.
In said structure, described filtration module comprises common mode inductance L3, filter capacitor C18, decoupling capacitor C12, Schottky diode D3, described common mode inductance L3 comprises input, output and ground, the input of common mode inductance L3 is connected with the positive pole of DC power supply, its output is connected with the positive pole of described filter capacitor C18 and one end of decoupling capacitor C12 respectively, the positive pole of filter capacitor C18 is all connected with the positive pole of described Schottky diode D3 with one end of decoupling capacitor C12, the negative pole of filter capacitor C18, the other end of decoupling capacitor C12 is all connected with the earth terminal of common mode inductance L 3, the negative pole of Schottky diode D3 is connected with the input of described voltage reduction module.
In said structure, described voltage reduction module also comprises current-limiting resistance R9, filter capacitor C1, current-limiting resistance R21, switch triode Q1, source of stable pressure U3, feedback capacity C21, feedback resistance R19, divider resistance R22, divider resistance R25, decoupling capacitor C10, filter capacitor C6, one end of described current-limiting resistance R9 is connected with the positive pole of described filter capacitor C1, the negative pole of filter capacitor C1 connects the negative loop of filter capacitor, the positive pole of filter capacitor C1 respectively with one end of described current-limiting resistance R21 and switch triode Q1 collector electrode be connected, the other end of divider resistance R21 respectively with the base stage of described switch triode Q1, the voltage stabilizing end of source of stable pressure U3 and one end of feedback capacity C21 connect, the negative loop of the ground connection termination filter capacitor of source of stable pressure U3, the reference voltage terminal of source of stable pressure U3 is connected to the series connection intermediate point of described divider resistance R22 and described divider resistance R25, and be connected with one end of described feedback resistance R19, form voltage stabilizing circuit, the other end of described feedback capacity C21 is connected with the other end of described feedback resistance R19, formed and export negative-feedback circuit, the negative loop of described divider resistance R25 mono-termination filter capacitor, described divider resistance R22 one end respectively with the emitter of described switch triode Q1, one end of decoupling capacitor C10, the positive pole of filter capacitor C6 connects, form positive loop output, the other end of described decoupling capacitor C10, the negative pole of filter capacitor C6 all connects the negative loop of filter capacitor, form negative loop.
In said structure, described dimming controlling module comprises adjustable resistance rotary switch RP1, divider resistance R13 and divider resistance R17, described adjustable resistance rotary switch RP1 has No. 1 pin, No. 2 pins, No. 3 pins, No. 4 pins and No. 5 pins, described No. 2 pins are voltage signal output pin, described No. 4 pins and No. 5 pins respectively with the other end of described current-limiting resistance R9, the positive pole of filtration module output connects, described No. 1 pin is connected with one end of described divider resistance R13, the other end of described divider resistance R13 is connected with the positive pole of the output of described voltage reduction module, described No. 3 pins are connected with one end of described divider resistance R17, the other end of described divider resistance R17 is connected with the negative pole of the output of described voltage reduction module.
In said structure, described light modulation driver module comprises LED driver U2, shunt capacitance C8, decoupling capacitor C4, decoupling capacitor C23, filter capacitor C5, filter capacitor C20, feedback capacity C9, feedback resistance R4, Schottky diode D1, power inductance L2, sample resistance R1, sample resistance R2, sample resistance R3, described LED driver U2 has pin 1, pin 2, pin 3, pin 4 and pin 5, wherein said pin 3 is voltage signal input pins of described light modulation driver module, its one end is connected with No. 2 pins of described dimming controlling module, the other end is connected with one end of described shunt capacitance C8, the other end of shunt capacitance C8 is connected with described pin 2, and access the negative loop of filter capacitor together with pin 2, described pin 5 respectively with No. 4 pins and the decoupling capacitor C4 of described adjustable resistance rotary switch RP1, sample resistance R1, sample resistance R2, sample resistance R3, one end of coupling resistance R4 connects, and is also connected with the positive pole of described filter capacitor C5, negative pole one end of Xiao Te diode D1 connects, and described pin 4 is voltage sampling pin, its respectively with described sample resistance R1, sample resistance R2, sample resistance R3 is connected with the other end of decoupling capacitor C23, also with the positive pole of described filter capacitor C20, the positive pole of LED connects, and described pin 1 is the negative loop end of LED electric current, is connected to the negative pole of LED with described power inductance L2 after connecting.
In said structure, described switch triode Q1 is switch triode C945, and described source of stable pressure U3 is source of stable pressure TL31.
In said structure, described LED driver U2 is drive IC PT4115.
The beneficial effects of the utility model are: filtration module is by the clutter filtering of DC power supply, for voltage reduction module, dimming controlling module and light modulation driver module provide burning voltage, by the power supply of dimming controlling module controlled hypotension module, the switch of dimming drive power, after energising, the voltage that filtration module exports is reduced to the rated operational voltage of dimming controlling module by voltage reduction module, dimming controlling module controls the size of exchanging the voltage signal that optical drive module exports, the size of the voltage signal that light modulation driver module exports according to dimming controlling module controls the voltage swing of driving LED lamp, reach the object controlling the change of LED light and shade, noise can not be produced in dimming process, and the voltage swing of LED is controlled by light modulation driver module, when power is less than certain value, LED there will not be scintillation, such LED is not easy to burn out, greatly improve the useful life of LED, reduce cost, meet the user demand of people.
Accompanying drawing explanation
Fig. 1 is the module map of the utility model LED adjusting control circuit
Fig. 2 is the schematic diagram of the utility model LED adjusting control circuit embodiment 1
Fig. 3 is the schematic diagram of the utility model LED adjusting control circuit embodiment 2
Embodiment
Below in conjunction with drawings and Examples, the utility model will be further described.
With reference to shown in Fig. 1, the LED adjusting control circuit that the utility model discloses, it comprises filtration module 2, voltage reduction module 3, dimming controlling module 4 and light modulation driver module 5;
Filtration module 2 comprises the input and output that are connected with DC power supply 1 positive pole, filtration module 2 for the clutter filtering by DC power supply 1, for voltage reduction module 3, dimming controlling module 4 and light modulation driver module 5 provide burning voltage;
Voltage reduction module 3 comprises the input and output that are connected with filtration module 2 output, and voltage reduction module 3 is reduced to the rated operational voltage of dimming controlling module 4 for the voltage exported by filtration module 2;
Dimming controlling module 4 comprises the first input end be connected with filtration module 2 output, the second input be connected with voltage reduction module 3 output and output, and dimming controlling module 4 is for the power supply of controlled hypotension module 3, the switch of dimming drive power 5 and the size for controlling the voltage signal to described light modulation driver module 5 output;
Light modulation driver module 5 comprises the input be connected with dimming controlling module 4 output and the output be connected with LED 6, light modulation drives mould 5 pieces to control the voltage swing of driving LED lamp 6 for the size of the voltage signal exported according to dimming controlling module 4, changes with the light and shade controlling LED 6.
Filtration module 2 is by the clutter filtering of DC power supply 1, for voltage reduction module 3, dimming controlling module 4 and light modulation driver module 5 provide burning voltage, by the power supply of dimming controlling module 4 controlled hypotension module 3, the switch of dimming drive power 5, after energising, the voltage that filtration module 2 exports is reduced to the rated operational voltage of dimming controlling module 4 by voltage reduction module 3, dimming controlling module 4 controls the size of exchanging the voltage signal that optical drive module 5 exports, the size of the voltage signal that light modulation driver module 5 exports according to dimming controlling module 4 controls the voltage swing of driving LED lamp 6, reach the object controlling the change of LED 6 light and shade, noise can not be produced in dimming process, and the voltage swing of LED 6 is controlled by light modulation driver module 5, when power is less than certain value, LED 6 there will not be scintillation, such LED 6 is not easy to burn out, greatly improve the useful life of LED 6, reduce cost.
Below in conjunction with specific embodiment, the utility model is described in further detail
Embodiment one
Shown in composition graphs 2, the specific embodiment of the light and shade change of a LED is controlled for the utility model, in the present embodiment, filtration module 2 comprises common mode inductance L3, filter capacitor C18, decoupling capacitor C12, Schottky diode D3, described common mode inductance L3 comprises input, output and ground, the input of common mode inductance L3 is connected with the positive pole of DC power supply 1, its output is connected with the positive pole of filter capacitor C18 and one end of decoupling capacitor C12 respectively, the positive pole of filter capacitor C18 is all connected with the positive pole of Schottky diode D3 with one end of decoupling capacitor C12, the negative pole of filter capacitor C18, the other end of decoupling capacitor C12 is all connected with the earth terminal of common mode inductance L 3, the negative pole of Schottky diode D3 is connected with the input of voltage reduction module 3.
Voltage reduction module 3 also comprises current-limiting resistance R9, filter capacitor C1, current-limiting resistance R21, switch triode Q1, source of stable pressure U3, feedback capacity C21, feedback resistance R19, divider resistance R22, divider resistance R25, decoupling capacitor C10, filter capacitor C6, one end of current-limiting resistance R9 is connected with the positive pole of filter capacitor C1, the negative pole of filter capacitor C1 connects the negative loop of filter capacitor, the positive pole of filter capacitor C1 respectively with one end of current-limiting resistance R21 and switch triode Q1 collector electrode be connected, the other end of divider resistance R21 respectively with the base stage of switch triode Q1, the voltage stabilizing end of source of stable pressure U3 and one end of feedback capacity C21 connect, the negative loop of the ground connection termination filter capacitor of source of stable pressure U3, the reference voltage terminal of source of stable pressure U3 is connected to the series connection intermediate point of divider resistance R22 and described divider resistance R25, and be connected with one end of feedback resistance R19, form voltage stabilizing circuit, the other end of feedback capacity C21 is connected with the other end of feedback resistance R19, formed and export negative-feedback circuit, the negative loop of divider resistance R25 mono-termination filter capacitor, divider resistance R22 one end respectively with the emitter of switch triode Q1, one end of decoupling capacitor C10, the positive pole of filter capacitor C6 connects, form positive loop output, the other end of decoupling capacitor C10, the negative pole of filter capacitor C6 all connects the negative loop of filter capacitor, form negative loop, wherein preferably, switch triode Q1 is switch triode C945, source of stable pressure U3 is source of stable pressure TL31.
Dimming controlling module 4 comprises adjustable resistance rotary switch RP1, divider resistance R13 and divider resistance R17, adjustable resistance rotary switch RP1 has No. 1 pin, No. 2 pins, No. 3 pins, No. 4 pins and No. 5 pins, No. 2 pins are voltage signal output pin, No. 4 pins and No. 5 pins respectively with the other end of current-limiting resistance R9, the positive pole of filtration module 2 output connects, No. 1 pin is connected with one end of divider resistance R13, the other end of divider resistance R13 is connected with the positive pole of the output of voltage reduction module 3, No. 3 pins are connected with one end of divider resistance R17, the other end of divider resistance R17 is connected with the negative pole of the output of voltage reduction module 3, during the knob clockwise direction turn of wherein adjustable resistance rotary switch RP1, the voltage signal exported by No. 2 pins can become large gradually, clockwise turn on earth time, the voltage signal exported by No. 2 pins can reach maximum, during the counterclockwise turn of the knob of adjustable resistance rotary switch RP1, the voltage signal exported by No. 2 pins can be diminished gradually, when counterclockwise turn is to end, the voltage signal exported by No. 2 pins can reach minimum, if continue counterclockwise turn again, No. 4 pins and No. 5 pins of adjustable resistance rotary switch RP1 can disconnect, thus cut off voltage reduction module 3 power supply, the power supply of light modulation driving voltage 5, reach the object of closing LED 6.
Light modulation driver module 5 comprises LED driver U2, shunt capacitance C8, decoupling capacitor C4, decoupling capacitor C23, filter capacitor C5, filter capacitor C20, feedback capacity C9, feedback resistance R4, Schottky diode D1, power inductance L2, sample resistance R1, sample resistance R2, sample resistance R3, LED driver U2 has pin 1, pin 2, pin 3, pin 4 and pin 5, wherein pin 3 is voltage signal input pins of described light modulation driver module 5, its one end is connected with No. 2 pins of dimming controlling module 4, the other end is connected with one end of shunt capacitance C8, the other end of shunt capacitance C8 is connected with pin 2, and access the negative loop of filter capacitor together with pin 2, pin 5 respectively with No. 4 pins and the decoupling capacitor C4 of adjustable resistance rotary switch RP1, sample resistance R1, sample resistance R2, sample resistance R3, one end of coupling resistance R4 connects, and is also connected with the positive pole of filter capacitor C5, negative pole one end of Xiao Te diode D1 connects, and pin 4 is voltage sampling pin, its respectively with sample resistance R1, sample resistance R2, sample resistance R3 is connected with the other end of decoupling capacitor C23, also with the positive pole of filter capacitor C20, the positive pole of LED 6 connects, and pin 1 is the negative loop end of LED 6 electric current, is connected to the negative pole of LED 6 with power inductance L2 after connecting, and wherein preferably, LED driver U2 is drive IC PT4115.
Operation principle of the present utility model is as follows: DC power supply 1 is via the common mode inductance L3 of filtration module 2, filter capacitor C1, after decoupling capacitor C12, Schottky diode D3 again by preventing reversal connection from burning out circuit, now, the artificial clockwise rotation of adjustable resistance rotary switch RP1 to dimming controlling module 4, No. 5 pins of adjustable resistance rotary switch RP1, No. 4 pins are communicated with, direct current is by after the current-limiting resistance R9 of voltage reduction module 3, again after the filter capacitor C1 of voltage reduction module 3, again through current-limiting resistance R21, switch triode Q1 base stage is made to obtain electric, switch triode Q1 saturation conduction, simultaneously due to source of stable pressure U3 obtain electric after, due to the sampling of reference voltage pin 1 pin, make the output 5V that switch triode Q1 is stable, 5V is after filtering after electric capacity C6 filtering, power to dimming controlling module 4, dimming controlling module 4 electric after, by the divider resistance R13 of dimming controlling module 4, after divider resistance R12 and adjustable resistance rotary switch RP1 dividing potential drop, corresponding output voltage signal can be obtained to light modulation driver module 5, light modulation driver module 5 is module 2 filtering after filtering, the power supply of dimming controlling module 4 switch open, the filtering of electric capacity C5 and the process of decoupling capacitor C4 after filtering again, the pin 5 of LED driver U2 obtains power work, simultaneously by sample resistance R1, sample resistance R2 and sample resistance R3, be transferred to LED 6 two ends filter capacitor C20, the positive terminal of the LED 6 of the process of decoupling capacitor C23, after light modulation driver module 5 obtains the voltage signal exported, by the pin 3 of the LED driver U2 of shunt capacitance C8 one end, be input to light modulation driver module 5 inner, also according to the signal that the pin 4 of LED driver U2 obtains from sample resistance, after the calculating of LED driver U2, the pin 1 of LED driver U2, coordinate Schottky diode D1 and power inductance L2, and feedback resistance R4 and feedback resistance C9 feedback, make the negative pole end voltage of LED 6 that corresponding change occur, the light and shade change of final control LED 6, wherein, when the knob clockwise direction turn of the adjustable resistance rotary switch RP1 of dimming controlling module 4, the voltage signal that dimming controlling module 4 exports becomes large gradually, what light modulation driver module 5 obtained according to this becomes large voltage signal gradually, the voltage controlling to export LED 6 two ends also becomes large gradually, this makes LED 6 also brighten gradually, when the knob up time pointing needle of adjustable resistance rotary switch RP1 is screwed into the end, LED 6 also just reaches the brightest state, after the knob dextrorotation on earth of adjustable resistance rotary switch RP1, during the counterclockwise turn of the knob of adjustable resistance rotary switch RP1, the voltage signal that dimming controlling module 4 exports diminishes gradually, the voltage signal diminished gradually that light modulation driver module 5 obtains according to this, the voltage controlling to export LED 6 two ends also diminishes gradually, this makes LED 6 also dimmed gradually, when the knob of adjustable resistance rotary switch RP1 is counterclockwise screwed into end, LED 6 also just reaches the darkest state, now, continue counterclockwise turn, No. 5 pins of adjustable resistance rotary switch RP1, No. 4 pins can disconnect, also voltage reduction module 3 is made, light modulation driver module 5 power-off, thus the object of closing LED 6 can be reached, resistance during knob turn due to adjustable resistance rotary switch RP1 is even variation, thus the light and shade of LED 6 is also evenly change, without frequent flashing control, noise can not be produced in dimming process, also there will not be scintillation, improve the useful life of LED 6, reduce cost.
Embodiment two
With reference to shown in Fig. 3, in the present embodiment, the utility model can control two string and the change of the light and shade of structure different LED 6 simultaneously, particularly, control on the basis of light and shade change of a LED 6 at above-described embodiment one, the output of filtration module 2 connects a voltage reduction module 3 successively again, dimming controlling module 4 and light modulation driver module 5a, control the light and shade change of another LED 6, its concrete operation principle is all identical, wherein voltage reduction module 3, dimming controlling module 4 is all identical, different according to LED 6 structure, in light modulation driver module 5a, LED driver changes into as LED driver U1, by arranging two cover circuit, can reach and control two string and the change of the light and shade of structure different LED 6 simultaneously, and noiseless in dimming process, flicker free phenomenon, reduce cost, convenient and practical.
Described above is only preferred embodiment of the present utility model, and above-mentioned specific embodiment is not to restriction of the present utility model.In technological thought category of the present utility model, can occur various distortion and amendment, all those of ordinary skill in the art, according to describing retouching, the amendment made above or equivalent replacing, all belong to the scope that the utility model is protected.
Claims (7)
1. a LED adjusting control circuit, is characterized in that: it comprises filtration module, voltage reduction module, dimming controlling module and light modulation driver module;
Described filtration module comprises the input and output that are connected with DC power anode, and described filtration module is used for the clutter filtering of described DC power supply, for described voltage reduction module, dimming controlling module and light modulation driver module provide burning voltage;
Described voltage reduction module comprises the input and output that are connected with described filtration module output, and described voltage reduction module is used for the rated operational voltage voltage that described filtration module exports being reduced to described dimming controlling module;
Described dimming controlling module comprises the first input end be connected with described filtration module output, the second input be connected with described voltage reduction module output and output, and described dimming controlling module is for controlling the power supply of described voltage reduction module, the switch of dimming drive power and the size for controlling the voltage signal to described light modulation driver module output;
Described light modulation driver module comprises the input be connected with described dimming controlling module output and the output be connected with LED, the size that described light modulation driver module is used for the voltage signal exported according to described dimming controlling module controls the voltage swing of driving LED lamp, to control the light and shade change of LED.
2. LED adjusting control circuit according to claim 1, it is characterized in that: described filtration module comprises common mode inductance L3, filter capacitor C18, decoupling capacitor C12, Schottky diode D3, described common mode inductance L3 comprises input, output and ground, the input of common mode inductance L3 is connected with the positive pole of DC power supply, its output is connected with the positive pole of described filter capacitor C18 and one end of decoupling capacitor C12 respectively, the positive pole of filter capacitor C18 is all connected with the positive pole of described Schottky diode D3 with one end of decoupling capacitor C12, the negative pole of filter capacitor C18, the other end of decoupling capacitor C12 is all connected with the earth terminal of common mode inductance L 3, the negative pole of Schottky diode D3 is connected with the input of described voltage reduction module.
3. LED adjusting control circuit according to claim 2, it is characterized in that: described voltage reduction module also comprises current-limiting resistance R9, filter capacitor C1, current-limiting resistance R21, switch triode Q1, source of stable pressure U3, feedback capacity C21, feedback resistance R19, divider resistance R22, divider resistance R25, decoupling capacitor C10, filter capacitor C6, one end of described current-limiting resistance R9 is connected with the positive pole of described filter capacitor C1, the negative pole of filter capacitor C1 connects the negative loop of filter capacitor, the positive pole of filter capacitor C1 respectively with one end of described current-limiting resistance R21 and switch triode Q1 collector electrode be connected, the other end of divider resistance R21 respectively with the base stage of described switch triode Q1, the voltage stabilizing end of source of stable pressure U3 and one end of feedback capacity C21 connect, the negative loop of the ground connection termination filter capacitor of source of stable pressure U3, the reference voltage terminal of source of stable pressure U3 is connected to the series connection intermediate point of described divider resistance R22 and described divider resistance R25, and be connected with one end of described feedback resistance R19, form voltage stabilizing circuit, the other end of described feedback capacity C21 is connected with the other end of described feedback resistance R19, formed and export negative-feedback circuit, the negative loop of described divider resistance R25 mono-termination filter capacitor, described divider resistance R22 one end respectively with the emitter of described switch triode Q1, one end of decoupling capacitor C10, the positive pole of filter capacitor C6 connects, form positive loop output, the other end of described decoupling capacitor C10, the negative pole of filter capacitor C6 all connects the negative loop of filter capacitor, form negative loop.
4. LED adjusting control circuit according to claim 3, it is characterized in that: described dimming controlling module comprises adjustable resistance rotary switch RP1, divider resistance R13 and divider resistance R17, described adjustable resistance rotary switch RP1 has No. 1 pin, No. 2 pins, No. 3 pins, No. 4 pins and No. 5 pins, described No. 2 pins are voltage signal output pin, described No. 4 pins and No. 5 pins respectively with the other end of described current-limiting resistance R9, the positive pole of filtration module output connects, described No. 1 pin is connected with one end of described divider resistance R13, the other end of described divider resistance R13 is connected with the positive pole of the output of described voltage reduction module, described No. 3 pins are connected with one end of described divider resistance R17, the other end of described divider resistance R17 is connected with the negative pole of the output of described voltage reduction module.
5. LED adjusting control circuit according to claim 4, is characterized in that: described light modulation driver module comprises LED driver U2, shunt capacitance C8, decoupling capacitor C4, decoupling capacitor C23, filter capacitor C5, filter capacitor C20, feedback capacity C9, feedback resistance R4, Schottky diode D1, power inductance L2, sample resistance R1, sample resistance R2, sample resistance R3, described LED driver U2 has pin 1, pin 2, pin 3, pin 4 and pin 5, wherein said pin 3 is voltage signal input pins of described light modulation driver module, its one end is connected with No. 2 pins of described dimming controlling module, the other end is connected with one end of described shunt capacitance C8, the other end of shunt capacitance C8 is connected with described pin 2, and access the negative loop of filter capacitor together with pin 2, described pin 5 respectively with No. 4 pins and the decoupling capacitor C4 of described adjustable resistance rotary switch RP1, sample resistance R1, sample resistance R2, sample resistance R3, one end of coupling resistance R4 connects, and is also connected with the positive pole of described filter capacitor C5, negative pole one end of Xiao Te diode D1 connects, and described pin 4 is voltage sampling pin, its respectively with described sample resistance R1, sample resistance R2, sample resistance R3 is connected with the other end of decoupling capacitor C23, also with the positive pole of described filter capacitor C20, the positive pole of LED connects, and described pin 1 is the negative loop end of LED electric current, is connected to the negative pole of LED with described power inductance L2 after connecting.
6. LED adjusting control circuit according to claim 3, is characterized in that: described switch triode Q1 is switch triode C945, and described source of stable pressure U3 is source of stable pressure TL31.
7. LED adjusting control circuit according to claim 5, is characterized in that: described LED driver U2 is drive IC PT4115.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420602690.3U CN204168548U (en) | 2014-10-17 | 2014-10-17 | LED adjusting control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420602690.3U CN204168548U (en) | 2014-10-17 | 2014-10-17 | LED adjusting control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204168548U true CN204168548U (en) | 2015-02-18 |
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|---|---|---|---|
| CN201420602690.3U Active CN204168548U (en) | 2014-10-17 | 2014-10-17 | LED adjusting control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113689814A (en) * | 2021-08-17 | 2021-11-23 | Tcl华星光电技术有限公司 | Driving circuit |
| CN113811046A (en) * | 2021-08-06 | 2021-12-17 | 珠海雷特科技股份有限公司 | Constant current circuit and LED lamp drive circuit based on non-common-anode constant current chip |
-
2014
- 2014-10-17 CN CN201420602690.3U patent/CN204168548U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113811046A (en) * | 2021-08-06 | 2021-12-17 | 珠海雷特科技股份有限公司 | Constant current circuit and LED lamp drive circuit based on non-common-anode constant current chip |
| CN113689814A (en) * | 2021-08-17 | 2021-11-23 | Tcl华星光电技术有限公司 | Driving circuit |
| CN113689814B (en) * | 2021-08-17 | 2023-12-22 | Tcl华星光电技术有限公司 | Driving circuit |
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