CN104994659A - LED dimming circuit - Google Patents
LED dimming circuit Download PDFInfo
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- CN104994659A CN104994659A CN201510439523.0A CN201510439523A CN104994659A CN 104994659 A CN104994659 A CN 104994659A CN 201510439523 A CN201510439523 A CN 201510439523A CN 104994659 A CN104994659 A CN 104994659A
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Abstract
The invention provides an LED dimming circuit, which comprises an input rectifier filter circuit, a transformer and an output rectifier filter circuit connected in sequence, wherein the transformer comprises a primary coil, a secondary coil and an auxiliary coil. The LED dimming circuit also comprises a phase-cut dimming circuit, a starting circuit, a driving control IC1, a power switch transistor, a feedback control circuit, a constant current and constant voltage IC2 and a 0-10V dimming circuit, wherein the input rectifier filter circuit is connected with the driving control IC1 via the starting circuit; the input rectifier filter circuit, the phase-cut dimming circuit, the driving control IC1 and the power switch transistor are connected in sequence; the power switch transistor is connected with the primary coil; the auxiliary coil is connected with the driving control IC1 and provides power for the driving control IC1; the secondary coil is connected with the output rectifier filter circuit, the output rectifier filter circuit is respectively connected with the constant current and constant voltage IC2 and the 0-10V dimming circuit, and the 0-10V dimming circuit is connected with the constant current and constant voltage IC2; and the constant current and constant voltage IC2 is connected with the driving control IC1 via the feedback control circuit. Compared with the prior art, the LED dimming circuit has the advantages of simple structure and convenient adjustment.
Description
Technical field
The present invention relates to a kind of LED illumination control circuit, be specially a kind of LED light adjusting circuit.
Background technology
LED is lighting source of new generation, and because LED luminous efficiency is high, energy ezpenditure is low, the life-span is long, not mercurous, and have good dimming behavior, therefore market spreading speed quickly.In order to build more comfortable lighting atmosphere and energy savings, the research of LED light regulating technology is seemed of crucial importance.Existing market two kinds of main flow dimmers, one is controllable silicon phase-cut dimmer, and another kind is 0-10V dimmer.But, existing LED power light modulation is all single a kind of dimming mode, and user can run into a lot of problem in installation and matching process, such as, must buy the light modulation device corresponded, the LED light adjusting circuit of obvious prior art can not meet the application demand of people.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, the LED Intelligent dimming circuit that a kind of structure is simple, easy to adjust is provided.
In order to solve the problems of the technologies described above, the present invention is by the following technical solutions: a kind of LED light adjusting circuit, it is characterized in that: comprise the input rectifying filter circuit, transformer and the output rectifier and filter that connect successively, described transformer comprises primary coil, secondary coil and ancillary coil; Also comprise phase-cut dimming circuit, start-up circuit, drived control IC1, power switch pipe, feedback control circuit, constant current constant voltage IC2 and 0-10V light adjusting circuit;
Described input rectifying filter circuit connects described drived control IC1 by described start-up circuit, described input rectifying filter circuit, described phase-cut dimming circuit, described drived control IC1 are connected successively with described power switch pipe, described power switch pipe connects described primary coil, described ancillary coil connects described drived control IC1, for drived control IC1 powers;
Described secondary coil connects described output rectifier and filter, and described output rectifier and filter connects described constant current constant voltage IC2 and described 0-10V light adjusting circuit respectively, and described 0-10V light adjusting circuit connects described constant current constant voltage IC2;
Described constant current constant voltage IC2 is connected with described drived control IC1 by described feedback control circuit.
Described phase-cut dimming circuit provides dim signal for drived control IC1, described output rectifier and filter by output voltage, current feedback in described constant current constant voltage IC2, respectively with reference voltage, current vs, when output voltage or electric current are greater than reference voltage or electric current, described constant current constant voltage IC2 exports dim signal and is sent to described drived control IC1 through described feedback control circuit, and described drived control IC1 correspondingly adjusts its output current; Described 0-10V light adjusting circuit provides dim signal to described constant current constant voltage IC2, and described constant current constant voltage IC2 exports dim signal and is sent to described drived control IC1 through feedback circuit, and described drived control IC1 correspondingly adjusts its output current.
LED Intelligent dimming circuit provided by the invention, apply simple structure, dimming mode conventional in compatible phase-cut dimming and 0-10V light modulation two kinds of prior aries, and, phase-cut dimming circuit and 0-10V light adjusting circuit are arranged at primary coil side and secondary coil side respectively, two kinds of separate adjustments of dim signal, and user can select required dimming mode according to actual conditions, during coupling light modulation part, range of choice is wider.Therefore compared with prior art, the present invention has structure advantage simple, easy to adjust.
Further, described phase-cut dimming circuit comprises resistance R4, R5 and R6 of series connection, and described input rectifying filter circuit connects described resistance R6, described resistance R4 ground connection; Described resistance R4, R5 and R6 dividing potential drop, described resistance R4 is connected the MULT pin of described drived control IC1 with the tie point of described resistance R5.When input voltage phase-cut dimming, the MULT pin of described drived control IC1 detects the voltage on resistance R4, thus regulation output current value.
Further, described 0-10V light adjusting circuit is provided with 0-10V light modulation IC3, voltage reference IC4 and 0-10V light modulation input; Described voltage reference IC4 plus earth, the IN+ pin of 0-10V light modulation IC3 is connected between described voltage reference IC4 negative electrode 4 and 0-10V light modulation input, so arranges and makes voltage reference IC4 provide reference voltage for 0-10V light modulation IC3; The Output pin of described 0-10V light modulation IC3 is connected by resistance R38 with IN1-pin.Above-mentioned set-up mode, makes the change in voltage of the Output pin voltage follow 0-10V light modulation input of 0-10V light modulation IC3, makes 0-10V light adjusting circuit regulate accurately; The Output pin of described 0-10V light modulation IC3 is connected by resistance R36, R41 with IN2+ pin; The IN2-pin of 0-10V light modulation IC3 is by electric capacity C21 ground connection; The Output2 pin of 0-10V light modulation IC3 connects IN2-pin through diode D9.Above-mentioned set-up mode, makes Output2 pin voltage follow Output pin change in voltage, namely follows the change in voltage of 0-10V light modulation input, i.e. 0-10V light adjusting circuit coating-forming voltage follower, and adapt to the parameter of constant current constant voltage IC2, it is more accurate to regulate.
Further, the output voltage of described output rectifier and filter is by the resistance R28 connected and R29 dividing potential drop, the tie point of described resistance R28 and R29 connects the IN1-pin of described constant current constant voltage IC2, described output rectifier and filter 3 connects the IN1+ pin of described constant current constant voltage IC2 by resistance R23 and R26, for constant current constant voltage IC2 internal reference provides reference power supply.
The Output2 pin of described 0-10V light adjusting circuit is connected to the IN2+ pin of described constant current constant voltage IC2 by resistance R31, the IN2-pin of described constant current constant voltage IC2 connects sampling resistor RJ1 by resistance R34, and described sampling resistor RJ1 is connected on the earth connection of described output rectifier and filter 3.
OUT1 pin, the OUT2 pin of described constant current constant voltage IC2 connect described feedback control circuit.
Further, described feedback control circuit comprises common anode diode and photoelectrical coupler; The OUT1 pin of described constant current constant voltage IC2, OUT2 pin are connected two negative electrodes of described common anode diode respectively by resistance R24 with R25; Described output rectifier and filter resistance R23, R22 connect the input anode of described photoelectrical coupler, and the anode of described common anode diode connects the input negative electrode of described photoelectrical coupler; The output of described photoelectrical coupler connects the COMP pin of described drived control IC1.Described constant current constant voltage IC2 compares output voltage and internal reference voltage, compare dim signal and the output current of the output of 0-10V light adjusting circuit, when output voltage is greater than certain value or 0-10V dim signal changes, light emitting source in photoelectrical coupler has electric current to pass through, photoelectrical coupler output current affects by it, feed back to drived control IC1, drived control IC changes the duty ratio of power switch pipe Q2, thus adjustment output current.
Further, ground connection after described ancillary coil contact resistance R7, R8; Described resistance R7 connects with described resistance R8 dividing potential drop, and its tie point is connected with drived control IC1, for drived control IC1 provides reference voltage.
Further, described ancillary coil connects the ZCD pin of described drived control IC1 by resistance R20, and the zero crossing electric current that ZCD pin detects ancillary coil prevents the appearance of described transformer saturated.
Further, the COMP pin of described drived control IC1 is connected with compensating circuit.Described compensating circuit maintains the stability of loop, makes the work that drived control IC1 keeps stable.
Further, be provided with sampling resistor RJ1 in described output rectifier and filter, sampling resistor RJ1 is connected with the IN2-pin of described constant current constant voltage IC2; Diode D6 in parallel on sampling resistor RJ1.When LED load short circuit, arranging of diode D6 can not be burned because electric current is excessive by protective resistance RJ1.
Further, also comprise passive leadage circuit, passive leadage circuit comprises resistance R3 and electric capacity CB2, one end ground connection of resistance R3, the other end connects described electric capacity CB2, and the other end of electric capacity CB2 is connected to described start-up circuit, transformer and phase-cut dimming circuit.Described passive leadage circuit guarantees that initial input current amount is enough to meet the minimal maintenance electric current of phase-cut dimming, and absorbs peak current, and input current is tended towards stability.
Accompanying drawing explanation
Fig. 1 is LED light adjusting circuit block diagram provided by the invention;
Fig. 2 is the circuit theory diagrams of LED light adjusting circuit provided by the invention;
Fig. 3 is 0-10V light adjusting circuit schematic diagram in LED light adjusting circuit provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
See Fig. 1 to 3, a kind of LED light adjusting circuit provided by the invention, comprise the input rectifying filter circuit 1, transformer 2 and the output rectifier and filter 3 that connect successively, described transformer 2 comprises primary coil 201, secondary coil 203 and ancillary coil 202; Also comprise phase-cut dimming circuit 4, start-up circuit 11, drived control IC1, power switch pipe 5, feedback control circuit 6, constant current constant voltage IC2 and 0-10V light adjusting circuit 7;
Described input rectifying filter circuit 1 connects described drived control IC1 by described start-up circuit 11, described input rectifying filter circuit 1, described phase-cut dimming circuit 4, described drived control IC1 are connected successively with described power switch pipe 5, described power switch pipe 5 connects described primary coil 201, described ancillary coil 202 connects described drived control IC1, for drived control IC1 powers;
Described secondary coil 203 connects described output rectifier and filter 3, and described output rectifier and filter 3 connects described constant current constant voltage IC2 and described 0-10V light adjusting circuit 7 respectively, and described 0-10V light adjusting circuit 7 connects described constant current constant voltage IC2;
Described constant current constant voltage IC2 is connected with described drived control IC1 by described feedback control circuit 6.
Described phase-cut dimming circuit 4 provides dim signal for drived control IC1, described output rectifier and filter 3 by output voltage, current feedback in described constant current constant voltage IC2, with its internal reference voltage, current vs, when output voltage is greater than reference voltage, electric current, described constant current constant voltage IC2 exports dim signal and is sent to described drived control IC1 through described feedback control circuit 6, and described drived control IC1 correspondingly adjusts its output current; Described 0-10V light adjusting circuit 7 provides dim signal to described constant current constant voltage IC2, and described constant current constant voltage IC2 exports dim signal and is sent to described drived control IC1 through feedback circuit 6, and described drived control IC1 correspondingly adjusts its output current.
A kind of LED light adjusting circuit provided by the invention, apply simple structure, the dimming mode that compatible phase-cut dimming and 0-10V light modulation two kinds of users commonly use, and, two kinds of separate adjustments of dim signal of phase-cut dimming circuit 4 and 0-10V light adjusting circuit 7, user can select required dimming mode according to actual conditions, and during coupling light modulation part, range of choice is wider.Therefore compared with prior art, the present invention has structure advantage simple, easy to adjust.
See Fig. 2, described phase-cut dimming circuit 4 comprises resistance R4, R5 and R6 of series connection, and described input rectifying filter circuit 1 connects described resistance R6, described resistance R4 ground connection; Described resistance R4, R5 and R6 dividing potential drop, described resistance R4 is connected the MULT pin of described drived control IC1 with the tie point of described resistance R5.When input voltage phase-cut dimming, the MULT pin of described drived control IC1 detects the voltage on resistance R4, thus regulation output current value.
See Fig. 2, described output rectifier and filter 3 provides vdd voltage by resistance R23, and described resistance R23 connects described constant current constant voltage IC2 and described 0-10V light adjusting circuit 7, for described constant current constant voltage IC2 and described 0-10V light adjusting circuit 7 are powered.
See Fig. 3, described 0-10V light adjusting circuit 7 is voltage and current follower, comprises 0-10V light modulation IC3, resistance R35, R36, R37, R38, R39, R40, R41, diode D9, electric capacity C21 and voltage reference IC4; Described resistance R40, R37 and R35 series connection dividing potential drop, the input (0-10V DIM+) of 0-10V light adjusting circuit 7 described in one termination of described resistance R40, voltage reference IC4 described in one termination of described resistance R35, the other end ground connection of described voltage reference IC4, described resistance R35 is connected the IN1+ pin of described 0-10V light modulation IC3 with the tie point of described resistance R37;
The IN1-pin of described 0-10V light modulation IC3 is by described resistance R39 ground connection, the Output pin of described 0-10V light modulation IC3 connects the IN1-pin of light modulation IC3 by described resistance R38, so arrange the input terminal voltage change of 0-10V light adjusting circuit 7 described in the Output pin voltage follow making 0-10V light modulation IC3;
The Output pin of described 0-10V light modulation IC3 is connected the IN2+ pin of described 0-10V light modulation IC3 by described resistance R36 with R41, the IN2-pin of described 0-10V light modulation IC3 is by described electric capacity C21 ground connection, the Output2 pin of described 0-10V light modulation IC3 connects its IN2-pin through described diode D9, setting like this makes the Output2 pin voltage follow Output pin change in voltage of described 0-10V light modulation IC3, namely follows the change in voltage of 0-10V light modulation input (0-10V DIM+);
The Output2 pin of described 0-10V light modulation IC3 exports the REF signal of carrying 0-10V light modulation input terminal voltage change, is connected to described constant current constant voltage IC2.
See Fig. 2, described start-up circuit 11 comprises resistance R13, R14, R15, and described input rectifying filtered electrical 1 connects the VCC pin of described drived control IC1 by resistance R13, R14, R15, starts described drived control IC1.
Described ancillary coil 202 connects the VCC pin of described drived control IC1 by linear voltage-stabilizing circuit 8, for described drived control IC1 powers.
Ground connection after described ancillary coil 202 contact resistance R8, R7; Described resistance R7 connects with described resistance R8 dividing potential drop, and its tie point is connected to the INV pin of described drived control IC1, the INV pin sampled voltage signal of described drived control IC1, and compares with internal reference voltage, to obtain fixing DC adjustmenting voltage.
The GD pin of described drived control IC1 connects the grid of described power switch pipe 5 by resistance R16, the source electrode of described power switch pipe 5 is by sampling resistor R19 ground connection, and the drain electrode of described power switch pipe 5 connects described primary coil 201.
Described ancillary coil 202 connects the ZCD pin of described drived control IC1 by resistance R20, and the zero crossing electric current that ZCD pin detects described ancillary coil 202 prevents described transformer 2 from occurring saturated.
The CS pin of described drived control IC1 connects sampling resistor R19 in order to detection of excessive current by resistance R12, and the CS pin of described drived control IC1 detects the electric current of described primary coil 201.
The COMP pin of described drived control IC1 is connected with compensating circuit 9, described compensating circuit 9 comprises resistance R9, R10 and electric capacity C2, it is in parallel with described resistance R10 after described resistance R9 connects with described electric capacity C2, one end of described resistance R9 connects described resistance R8, the other end connects described electric capacity C2, and the other end of described electric capacity C2 connects the COMP pin of drived control IC1.Described compensating circuit 9 maintains the stability of loop, makes the work that drived control IC1 keeps stable.
See Fig. 2, the output voltage of described output rectifier and filter 3 is by the resistance R28 connected and R29 dividing potential drop, the tie point of described resistance R28 and R29 connects the IN1-pin of described constant current constant voltage IC2, described output rectifier and filter 3 connects the IN1+ pin of described constant current constant voltage IC2 by resistance R23 and R26, for constant current constant voltage IC2 internal reference provides reference power supply.
The REF signal that described 0-10V light adjusting circuit 7 exports is connected to the IN2+ pin of described constant current constant voltage IC2 by resistance R31, the IN2-pin of described constant current constant voltage IC2 connects sampling resistor RJ1 by resistance R34, and described sampling resistor RJ1 is connected on the earth connection of described output rectifier and filter 3.
Described feedback control circuit 6 comprises common anode diode D8 and photoelectrical coupler 601; The OUT1 pin of described constant current constant voltage IC2, OUT2 pin are connected two negative electrodes of described common anode diode D8 respectively by resistance R24 with R25; Described VDD signal connects the input anode of described photoelectrical coupler 601 by resistance R22, and the anode of described common anode diode connects the input negative electrode of described photoelectrical coupler 601; The output of described photoelectrical coupler 601 connects the COMP pin of described drived control IC1.Described constant current constant voltage IC2 compares output voltage and internal reference voltage, compare REF signal and the output current of the output of 0-10V light adjusting circuit, when output voltage is greater than certain value or REF signal changes, light emitting source in photoelectrical coupler 601 has electric current to pass through, photoelectrical coupler 601 output current affects by it, feed back to drived control IC1, change the duty ratio of drived control IC1 output current, thus adjustment output current.
See Fig. 2; as a kind of preferred version, diode D6 in parallel on described sampling resistor RJ1, when LED load short circuit; LED load, common mode inductance LF3, diode D6, secondary coil 203 form loop, and protection sampling resistor RJ1 is not burned because electric current is excessive.
See Fig. 2, as a kind of preferred version, described input rectifying filter circuit 1 connects drived control IC1, transformer 2 and phase-cut dimming circuit 4 by passive leadage circuit 10, described passive leadage circuit 10 comprises resistance R3 and electric capacity CB2, one end ground connection of described resistance R3, the other end connects described electric capacity CB2, and the other end of described electric capacity CB2 is connected to described start-up circuit 11, primary coil 201 and phase-cut dimming circuit 4.Described passive leadage circuit 10 guarantees that initial input current amount is enough to meet the minimal maintenance electric current of phase-cut dimming 4, and absorbs peak current, and input current is tended towards stability.
See Fig. 2, as a kind of preferred version, described linear voltage-stabilizing circuit 8 adopts LDO voltage stabilizing circuit.When input and output curent change, described linear voltage-stabilizing circuit can maintain drived control IC1 and be in normal operating state always.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change above-mentioned execution mode and revise.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. a LED light adjusting circuit, is characterized in that: comprise the input rectifying filter circuit, transformer and the output rectifier and filter that connect successively, described transformer comprises primary coil, secondary coil and ancillary coil; Also comprise phase-cut dimming circuit, start-up circuit, drived control IC1, power switch pipe, feedback control circuit, constant current constant voltage IC2 and 0-10V light adjusting circuit;
Described input rectifying filter circuit connects described drived control IC1 by described start-up circuit, described input rectifying filter circuit, described phase-cut dimming circuit, described drived control IC1 are connected successively with described power switch pipe, described power switch pipe connects described primary coil, described ancillary coil connects described drived control IC1, for drived control IC1 powers;
Described secondary coil connects described output rectifier and filter, and described output rectifier and filter connects described constant current constant voltage IC2 and described 0-10V light adjusting circuit respectively, and described 0-10V light adjusting circuit connects described constant current constant voltage IC2;
Described constant current constant voltage IC2 is connected with described drived control IC1 by described feedback control circuit.
Described phase-cut dimming circuit provides dim signal for drived control IC1, described output rectifier and filter by output voltage, current feedback in described constant current constant voltage IC2, respectively with reference voltage, current vs, when output voltage or electric current are greater than reference voltage or electric current, described constant current constant voltage IC2 exports dim signal and is sent to described drived control IC1 through described feedback control circuit, and described drived control IC1 correspondingly adjusts its output current; Described 0-10V light adjusting circuit provides dim signal to described constant current constant voltage IC2, and described constant current constant voltage IC2 exports dim signal and is sent to described drived control IC1 through feedback circuit, and described drived control IC1 correspondingly adjusts its output current.
2. a kind of LED light adjusting circuit according to claim 1, it is characterized in that: described phase-cut dimming circuit comprises resistance R4, R5 and R6 of series connection, described input rectifying filter circuit connects described resistance R6, described resistance R4 ground connection; Described resistance R4, R5 and R6 dividing potential drop, described resistance R4 is connected the MULT pin of described drived control IC1 with the tie point of described resistance R5.
3. a kind of LED light adjusting circuit according to claim 1, is characterized in that: described 0-10V light adjusting circuit is provided with 0-10V light modulation IC3, voltage reference IC4 and 0-10V light modulation input; Described voltage reference IC4 plus earth, the IN1+ pin of described 0-10V light modulation IC3 is connected between the negative electrode of voltage reference IC4 and 0-10V light modulation input;
The Output pin of described 0-10V light modulation IC3 is connected by resistance R38 with IN1-pin;
The Output pin of described 0-10V light modulation IC3 is connected by resistance R36, R41 with IN2+ pin; The IN2-pin of 0-10V light modulation IC3 is by electric capacity C21 ground connection; The Output2 pin of 0-10V light modulation IC3 connects IN2-pin through diode D9.
4. a kind of LED light adjusting circuit according to claim 3, it is characterized in that: the output voltage of described output rectifier and filter is by the resistance R28 connected and R29 dividing potential drop, the tie point of described resistance R28 and R29 connects the IN1-pin of described constant current constant voltage IC2, described output rectifier and filter 3 connects the IN1+ pin of described constant current constant voltage IC2 by resistance R23 and R26, for constant current constant voltage IC2 internal reference provides reference power supply;
The dim signal that described 0-10V light adjusting circuit exports is connected to the IN2+ pin of described constant current constant voltage IC2 by resistance R31, the IN2-pin of described constant current constant voltage IC2 connects sampling resistor RJ1 by resistance R34, and described sampling resistor RJ1 is connected on the earth connection of described output rectifier and filter 3;
OUT1 pin, the OUT2 pin of described constant current constant voltage IC2 connect described feedback control circuit.
5. a kind of LED light adjusting circuit according to claim 4, is characterized in that: described feedback control circuit comprises common anode diode and photoelectrical coupler; The OUT1 pin of described constant current constant voltage IC2, OUT2 pin are connected two negative electrodes of described common anode diode respectively by resistance R24 with R25; Described output rectifier and filter connects the input anode of described photoelectrical coupler by resistance R23, R22, and the anode of described common anode diode connects the input negative electrode of described photoelectrical coupler; The output of described photoelectrical coupler connects the COMP pin of described drived control IC1.
6. a kind of LED light adjusting circuit according to claim 1, is characterized in that: ground connection after described ancillary coil contact resistance R7, R8; Described resistance R7 connects with described resistance R8 dividing potential drop, and its tie point is connected with drived control IC1, for drived control IC1 provides reference voltage.
7. a kind of LED light adjusting circuit according to claim 1, is characterized in that: described ancillary coil connects the ZCD pin of described drived control IC1 by resistance R20, and the zero crossing electric current that ZCD pin detects ancillary coil prevents the appearance of described transformer saturated.
8. a kind of LED light adjusting circuit according to claim 1, is characterized in that: the COMP pin of described drived control IC1 is connected with compensating circuit.
9. a kind of LED light adjusting circuit according to claim 1, is characterized in that: be provided with sampling resistor RJ1 in described output rectifier and filter, and sampling resistor RJ1 is connected with the IN2-pin of described constant current constant voltage IC2; Diode D6 in parallel on sampling resistor RJ1.
10. a kind of LED light adjusting circuit according to claim 1, it is characterized in that: also comprise passive leadage circuit, passive leadage circuit comprises resistance R3 and electric capacity CB2, one end ground connection of resistance R3, the other end connects described electric capacity CB2, and the other end of described electric capacity CB2 is connected to described start-up circuit, transformer and phase-cut dimming circuit.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109757009A (en) * | 2019-03-14 | 2019-05-14 | 深圳市健森实业有限公司 | A kind of high-precision LED light modulation line and input-output line isolation circuit control system |
| CN110519901A (en) * | 2019-09-19 | 2019-11-29 | 深圳市紫光照明技术股份有限公司 | A kind of Intelligent lamp |
| CN110753422A (en) * | 2019-10-19 | 2020-02-04 | 浙江凯耀照明有限责任公司 | Quick start circuit applied to operational amplifier building |
| CN110753428A (en) * | 2019-09-19 | 2020-02-04 | 浙江凯耀照明有限责任公司 | Isolation dimming circuit built by operational amplifier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102026453A (en) * | 2010-12-31 | 2011-04-20 | 崧顺电子（深圳）有限公司 | Light emitting diode (LED) power source dimming control device |
| CN201854482U (en) * | 2010-11-01 | 2011-06-01 | 王子能 | LED power circuit |
| CN102264175A (en) * | 2010-05-26 | 2011-11-30 | 马士科技有限公司 | Light emitting diode lamp dimming device capable of realizing stepped dimming |
| US20130134904A1 (en) * | 2011-11-24 | 2013-05-30 | Leadtrend Technology Corp. | Dimming driving system and dimming controller |
| CN205017633U (en) * | 2015-07-23 | 2016-02-03 | 佛山冠今光电科技有限公司 | LED light modulation circuit |
-
2015
- 2015-07-23 CN CN201510439523.0A patent/CN104994659B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264175A (en) * | 2010-05-26 | 2011-11-30 | 马士科技有限公司 | Light emitting diode lamp dimming device capable of realizing stepped dimming |
| CN201854482U (en) * | 2010-11-01 | 2011-06-01 | 王子能 | LED power circuit |
| CN102026453A (en) * | 2010-12-31 | 2011-04-20 | 崧顺电子（深圳）有限公司 | Light emitting diode (LED) power source dimming control device |
| US20130134904A1 (en) * | 2011-11-24 | 2013-05-30 | Leadtrend Technology Corp. | Dimming driving system and dimming controller |
| CN205017633U (en) * | 2015-07-23 | 2016-02-03 | 佛山冠今光电科技有限公司 | LED light modulation circuit |
Non-Patent Citations (1)
| Title |
|---|
| STMICROELECTRONICS: "《AN2711 Application note》", 30 September 2010 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109757009A (en) * | 2019-03-14 | 2019-05-14 | 深圳市健森实业有限公司 | A kind of high-precision LED light modulation line and input-output line isolation circuit control system |
| CN110519901A (en) * | 2019-09-19 | 2019-11-29 | 深圳市紫光照明技术股份有限公司 | A kind of Intelligent lamp |
| CN110753428A (en) * | 2019-09-19 | 2020-02-04 | 浙江凯耀照明有限责任公司 | Isolation dimming circuit built by operational amplifier |
| CN110753428B (en) * | 2019-09-19 | 2021-06-08 | 浙江凯耀照明有限责任公司 | Isolation dimming circuit built by operational amplifier |
| CN110753422A (en) * | 2019-10-19 | 2020-02-04 | 浙江凯耀照明有限责任公司 | Quick start circuit applied to operational amplifier building |
| CN110753422B (en) * | 2019-10-19 | 2021-12-03 | 浙江凯耀照明有限责任公司 | Quick start circuit applied to operational amplifier building |
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| Publication number | Publication date |
|---|---|
| CN104994659B (en) | 2018-05-18 |
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Denomination of invention: A LED dimming circuit Effective date of registration: 20201214 Granted publication date: 20180518 Pledgee: Shunde Guangdong rural commercial bank Limited by Share Ltd. Daliang branch Pledgor: FOSHAN TOPDAY OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Registration number: Y2020980009231 |
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Date of cancellation: 20211217 Granted publication date: 20180518 Pledgee: Shunde Guangdong rural commercial bank Limited by Share Ltd. Daliang branch Pledgor: FOSHAN TOPDAY OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Registration number: Y2020980009231 |
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Denomination of invention: LED dimming circuit Effective date of registration: 20211220 Granted publication date: 20180518 Pledgee: Guangdong Shunde Rural Commercial Bank Co.,Ltd. science and technology innovation sub branch Pledgor: FOSHAN TOPDAY OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Registration number: Y2021980015722 |