CN109104795A - A kind of LED drive control circuit of tunable optical - Google Patents
A kind of LED drive control circuit of tunable optical Download PDFInfo
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- CN109104795A CN109104795A CN201811154164.4A CN201811154164A CN109104795A CN 109104795 A CN109104795 A CN 109104795A CN 201811154164 A CN201811154164 A CN 201811154164A CN 109104795 A CN109104795 A CN 109104795A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
Abstract
A kind of LED drive control circuit of tunable optical, it is characterised in that: including constant voltage power supply circuit unit, 5V-0V analog signal control circuit unit and LED light constant-current drive circuit unit；Constant voltage power supply circuit unit is made of voltage stabilizing chip U3, DC/DC converter B1, DC/DC converter B2 and its connection circuit；5V-0V analog signal control circuit unit is made of analog switch chip U2, the part A of amplifier chip U1, photoelectrical coupler T1 and its connection circuit；LED light constant-current drive circuit unit is made of the part B of amplifier chip U1, the C portion of amplifier chip U1, the part D of amplifier chip U1 and its connection circuit；Design has the signal of output PWM to carry out switch control to LED in master board of the invention, and output voltage analog signal controls brightness.The circuit can effectively control LED light according to the analog signal of input and shine, and light emission luminance is linear with analog signal.
Description
Technical field
The present invention relates to control circuit technical field more particularly to a kind of LED drive control circuits of tunable optical.
Technical background
On online three-dimensional tin cream detection device (SPI), design has the optical projection optical path of tripleplane's grating, this optical path
Need 30W high-power and high-luminance LED lamp as light source.For the efficiency for improving LED light, extend the LED light service life, the LED light source
Switch time point and brightness require to be controlled, and existing conventional LED control circuit cannot using single dimming mode on the market
It satisfies the use demand.
Summary of the invention
The present invention overcomes the deficiencies of existing technologies, it is desirable to provide one kind by 5V-0V analog signal control LED light shine and
On-off is carried out to analog signal with pwm signal to control the LED drive control circuit for the tunable optical that LED shines or turns off, purpose
It is switching electricity to be carried out to LED after receiving pwm signal；And after receiving voltage analog signal, to the input electricity of LED
Stream is controlled to achieve the effect that control LED luminance.The present invention adopts the following technical scheme that.
A kind of LED drive control circuit of tunable optical, it is characterised in that: simulated including constant voltage power supply circuit unit, 5V-0V
Signal control circuit unit and LED light constant-current drive circuit unit；Constant voltage power supply circuit unit is by voltage stabilizing chip U3, DC/DC
Converter B1, DC/DC converter B2 and its connection circuit composition；5V-0V analog signal control circuit unit is by analog switch core
Piece U2, the part A of amplifier chip U1, photoelectrical coupler T1 and its connection circuit composition；LED light constant-current drive circuit unit by
The part B of amplifier chip U1, the C portion of amplifier chip U1, the part D of amplifier chip U1 and its connection circuit composition.
The anode connection of the 1st pin and diode D5 of connector CN11；The cathode of diode D5, the one end capacitor C11, electricity
Hold one end of C10, the 1st pin of connector CN12, one end of capacitor C31 and one end of capacitor C32 and is connected to chip together
The 1st pin of U3, the 2nd pin of chip U3, one end of capacitor C33, one end of capacitor C34, one end of capacitor C36 and capacitor C37
One end be connected to the 16th pin of chip U2 together, while being connected to photoelectric coupling after the 2nd pin serial connection resistance R6 of chip U3
The 6th pin of device T1；The cathode of diode D5, the one end capacitor C11, one end of capacitor C10, connector CN12 the 1st pin, electricity
One end of one end and capacitor C28 for holding C27 is connected to the 1st pin of DC/DC converter B2 together, DC/DC converter B2's
4th pin, one end of capacitor C29, one end of capacitor C30, one end of capacitor C35 and capacitor C38 one end be connected to together
One end of one end of resistance R24, the other end of resistance R24 and capacitor C13, capacitor C14 one end access chip U1 together the portion A
The 4th pin divided；The cathode of diode D5, the one end capacitor C11, one end of capacitor C10, connector CN12 the 1st pin, capacitor
One end of C6 and one end of capacitor C7 are connected to the 1st pin of DC/DC converter B1 together, and the 3rd of DC/DC converter B1 is drawn
Foot, one end of capacitor C8, capacitor C9 one end be connected to one end of resistance R25, the other end and capacitor C15 of resistance R25 together
One end, capacitor C16 one end part A of access chip U1 together the 11st pin；The 3rd pin of DC/DC converter B1 is same
When connected with one end of one end of resistance R2, resistance R3；The other end of capacitor C6, the other end of capacitor C7, capacitor C8 it is another
End, the other end of capacitor C9, the other end of capacitor C10, the other end of capacitor C11, the other end of capacitor C13, capacitor C14 it is another
One end, the other end of capacitor C15, the other end of capacitor C16, the other end of capacitor C27, the other end of capacitor C28, capacitor C29
The other end, the other end of capacitor C30, the other end of capacitor C31, the other end of capacitor C32, capacitor C33 the other end, capacitor
The other end of C34, the other end of capacitor C35, the other end of capacitor C36, the other end of capacitor C37, capacitor C38 the other end,
The 2nd pin, the 3rd pin of chip U3, the 2nd pin of DC/DC converter B1, the 4th pin and the DC/DC conversion of connector CN12
The 2nd pin, the 3rd pin of device B2 is grounded.
The 3rd pin of DC/DC converter B1 is connected with one end of one end of resistance R2, resistance R3 simultaneously；Resistance R2's is another
One end, one end of resistance R3, one end of capacitor C4, the anode of zener diode D2, one end of capacitor C3 and resistance R31 one
End is connected to one end of resistance R16 together, and the cathode of zener diode D2 is connected with the cathode of diode D1；Resistance R16's is another
One end of one end, one end of resistance R15 and resistance R17 is connected to the 2nd pin of the part A of chip U1 together；Resistance R15's
The other end, one end of resistance R26, capacitor C20 one end connected with one end of capacitor C24；3rd pin of the part A of chip U1
It is grounded after series resistance R18；1st pin of the part A of the other end and chip U1 of resistance R17 is connected to the of chip U2 together
12 pins, the 12nd pin of chip U2 are connected to one end of resistance R12, and the 11st pin of chip U2 is connected to photoelectrical coupler T1
The 6th pin；One end of the 1st pin connection resistance R1 of photoelectrical coupler T1 and one end of capacitor C21, resistance R1's is another
End is connected to the 4th pin of connector CON5P, and the 5th pin of connector CON5P is connected to the other end of resistance R26；Diode
The anode of D1, the other end of capacitor C3, the other end of capacitor C4, the other end of capacitor C20, the other end of capacitor C24, capacitor
The other end of C21, the 1st to the 10th pin, the 13rd pin, the 15th pin of chip U2, the 3rd, the 4th of photoelectrical coupler T1 are drawn
Foot, connector CON5P the 1st, the 2nd, the 3rd pin is grounded.
The other end of resistance R12, the other end of resistance R31, one end of resistance R13 and capacitor C5 one end connect together
To the 5th pin of the part B of chip U1；One end of resistance R7 capacitor C19b capacitor C23 parallel connection and one end of resistance R9 connect together
It is connected to the 6th pin of the part B of chip U1；The other end and resistance R10 capacitor C19c of resistance R7 capacitor C19b capacitor C23 parallel connection
One end in parallel is connected to the 7th pin of the part B of chip U1 together；The other end series connection two of resistance R10 capacitor C19c parallel connection
The base stage of triode Q1a is accessed after pole pipe D4, resistance R4；The emitter of triode Q1a and one end of resistance R23 are connected to three poles
The base stage of pipe Q1；One end of the collector of triode Q1a, the collector of triode Q1 and resistance R19 is connected to triode Q2's
Base stage；The emitter of triode Q2, the other end of resistance R19, one end of capacitor C39, one end of capacitor C1, capacitor C2 one end
And one end of resistance R28 is connected to the 3rd pin of connector CONVIN together, the other end of resistance R28 connects diode
It is grounded after VinLED；The collector of triode Q2, the emitter of triode Q1, the other end of resistance R23 and resistance R30 resistance
One end of R29 capacitor C26 capacitor C25 parallel connection is connected to the anode of load LED lamp lamp LED_OUT together；Load LED lamp lamp LED_
The cathode of OUT and the other end of resistance R30 resistance R29 capacitor C26 capacitor C25 parallel connection are connected to the 1st of four-wire ohm R27 together
Pin；The 2nd pin of four-wire ohm R27, one end of capacitor C18 are connected with one end of resistance R8；The other end and electricity of resistance R8
One end of resistance R14 is connected to the 13rd pin of the part D of chip U1；The other end of resistance R14 is connected with one end of resistance R14a
To the 14th pin of the part D of chip U1；The 3rd pin, the other end of capacitor C18 and one end of resistance R8a of four-wire ohm R27
Connection；One end of the other end of resistance R8a, the other end of resistance R14a and resistance R11 is connected to the C portion of chip U1 together
9th pin；The other end of resistance R11 and the other end of resistance R9 are connected to the 8th pin of the C portion of chip U1；Resistance R13's
The other end, the other end of capacitor C5, capacitor C1 the other end, the other end of capacitor C2, the other end of capacitor C39, connector
CONVIN the 1st, the 2nd pin is grounded and the 4th pin of four-wire ohm R27, chip U1 C portion the 10th pin, core
12nd pin of the part D of piece U1 is grounded.
Further, the chip U1 is model TL074CDR；The chip U2 is IC74HCT4053；The chip U3
For K78050；The photoelectrical coupler T1 model TPL181.
Further, the DC/DC converter B1, the DC/DC converter B2 are 4 pin sockets；The connector
CN11, the connector CN12 are 2 pin sockets；The connector CON5P is 5 pin sockets；The connector CONVIN is 3
Pin sockets.
Further, the resistance R27 is four-wire ohm MT4.
Further, the triode Q1a, the triode Q1 are NPN type triode, and the high power tube Q2 is PNP
Type triode.
The beneficial effects of the practice of the present invention is: in master board of the invention design have output PWM signal to LED into
Row switch control, output voltage analog signal control brightness.The circuit can effectively be controlled according to the analog signal of input
LED lamp processed shines, and light emission luminance is linear with analog signal.Available pwm signal carries out control LED light switch simultaneously
Length of time, and the analog signal of available 5V-0V carries out LED light brightness regulation, brightness and the voltage analog signal of LED is inversely proportional
Example linear relationship.
Detailed description of the invention
Attached drawing 1 is circuit diagram of the invention.
Specific embodiment
A kind of LED drive control circuit of tunable optical, including constant voltage power supply circuit unit 3,5V-0V analog signal control electricity
Road unit 2 and LED light constant-current drive circuit unit 1；Constant voltage power supply circuit unit 3 is by voltage stabilizing chip U3, DC/DC converter
B1, DC/DC converter B2 and its connection circuit composition；5V-0V analog signal control circuit unit 2 by analog switch chip U2,
Part A, photoelectrical coupler T1 and its connection circuit composition of amplifier chip U1；LED light constant-current drive circuit unit 1 is by amplifying
The part B of device chip U1, the C portion of amplifier chip U1, the part D of amplifier chip U1 and its connection circuit composition.
The anode connection of the 1st pin and diode D5 of connector CN11；The cathode of diode D5, the one end capacitor C11, electricity
Hold one end of C10, the 1st pin of connector CN12, one end of capacitor C31 and one end of capacitor C32 and is connected to chip together
The 1st pin of U3, the 2nd pin of chip U3, one end of capacitor C33, one end of capacitor C34, one end of capacitor C36 and capacitor C37
One end be connected to the 16th pin of chip U2 together, while being connected to photoelectric coupling after the 2nd pin serial connection resistance R6 of chip U3
The 6th pin of device T1；The cathode of diode D5, the one end capacitor C11, one end of capacitor C10, connector CN12 the 1st pin, electricity
One end of one end and capacitor C28 for holding C27 is connected to the 1st pin of DC/DC converter B2 together, DC/DC converter B2's
4th pin, one end of capacitor C29, one end of capacitor C30, one end of capacitor C35 and capacitor C38 one end be connected to together
One end of one end of resistance R24, the other end of resistance R24 and capacitor C13, capacitor C14 one end access chip U1 together the portion A
The 4th pin divided；The cathode of diode D5, the one end capacitor C11, one end of capacitor C10, connector CN12 the 1st pin, capacitor
One end of C6 and one end of capacitor C7 are connected to the 1st pin of DC/DC converter B1 together, and the 3rd of DC/DC converter B1 is drawn
Foot, one end of capacitor C8, capacitor C9 one end be connected to one end of resistance R25, the other end and capacitor C15 of resistance R25 together
One end, capacitor C16 one end part A of access chip U1 together the 11st pin；The 3rd pin of DC/DC converter B1 is same
When connected with one end of one end of resistance R2, resistance R3；The other end of capacitor C6, the other end of capacitor C7, capacitor C8 it is another
End, the other end of capacitor C9, the other end of capacitor C10, the other end of capacitor C11, the other end of capacitor C13, capacitor C14 it is another
One end, the other end of capacitor C15, the other end of capacitor C16, the other end of capacitor C27, the other end of capacitor C28, capacitor C29
The other end, the other end of capacitor C30, the other end of capacitor C31, the other end of capacitor C32, capacitor C33 the other end, capacitor
The other end of C34, the other end of capacitor C35, the other end of capacitor C36, the other end of capacitor C37, capacitor C38 the other end,
The 2nd pin, the 3rd pin of chip U3, the 2nd pin of DC/DC converter B1, the 4th pin and the DC/DC conversion of connector CN12
The 2nd pin, the 3rd pin of device B2 is grounded.
The 3rd pin of DC/DC converter B1 is connected with one end of one end of resistance R2, resistance R3 simultaneously；Resistance R2's is another
One end, one end of resistance R3, one end of capacitor C4, the anode of zener diode D2, one end of capacitor C3 and resistance R31 one
End is connected to one end of resistance R16 together, and the cathode of zener diode D2 is connected with the cathode of diode D1；Resistance R16's is another
One end of one end, one end of resistance R15 and resistance R17 is connected to the 2nd pin of the part A of chip U1 together；Resistance R15's
The other end, one end of resistance R26, capacitor C20 one end connected with one end of capacitor C24；3rd pin of the part A of chip U1
It is grounded after series resistance R18；1st pin of the part A of the other end and chip U1 of resistance R17 is connected to the of chip U2 together
12 pins, the 12nd pin of chip U2 are connected to one end of resistance R12, and the 11st pin of chip U2 is connected to photoelectrical coupler T1
The 6th pin；One end of the 1st pin connection resistance R1 of photoelectrical coupler T1 and one end of capacitor C21, resistance R1's is another
End is connected to the 4th pin of connector CON5P, and the 5th pin of connector CON5P is connected to the other end of resistance R26；Diode
The anode of D1, the other end of capacitor C3, the other end of capacitor C4, the other end of capacitor C20, the other end of capacitor C24, capacitor
The other end of C21, the 1st to the 10th pin, the 13rd pin, the 15th pin of chip U2, the 3rd, the 4th of photoelectrical coupler T1 are drawn
Foot, connector CON5P the 1st, the 2nd, the 3rd pin is grounded.
The other end of resistance R12, the other end of resistance R31, one end of resistance R13 and capacitor C5 one end connect together
To the 5th pin of the part B of chip U1；One end of resistance R7 capacitor C19b capacitor C23 parallel connection and one end of resistance R9 connect together
It is connected to the 6th pin of the part B of chip U1；The other end and resistance R10 capacitor C19c of resistance R7 capacitor C19b capacitor C23 parallel connection
One end in parallel is connected to the 7th pin of the part B of chip U1 together；The other end series connection two of resistance R10 capacitor C19c parallel connection
The base stage of triode Q1a is accessed after pole pipe D4, resistance R4；The emitter of triode Q1a and one end of resistance R23 are connected to three poles
The base stage of pipe Q1；One end of the collector of triode Q1a, the collector of triode Q1 and resistance R19 is connected to triode Q2's
Base stage；The emitter of triode Q2, the other end of resistance R19, one end of capacitor C39, one end of capacitor C1, capacitor C2 one end
And one end of resistance R28 is connected to the 3rd pin of connector CONVIN together, the other end of resistance R28 connects diode
It is grounded after VinLED；The collector of triode Q2, the emitter of triode Q1, the other end of resistance R23 and resistance R30 resistance
One end of R29 capacitor C26 capacitor C25 parallel connection is connected to the anode of load LED lamp lamp LED_OUT together；Load LED lamp lamp LED_
The cathode of OUT and the other end of resistance R30 resistance R29 capacitor C26 capacitor C25 parallel connection are connected to the 1st of four-wire ohm R27 together
Pin；The 2nd pin of four-wire ohm R27, one end of capacitor C18 are connected with one end of resistance R8；The other end and electricity of resistance R8
One end of resistance R14 is connected to the 13rd pin of the part D of chip U1；The other end of resistance R14 is connected with one end of resistance R14a
To the 14th pin of the part D of chip U1；The 3rd pin, the other end of capacitor C18 and one end of resistance R8a of four-wire ohm R27
Connection；One end of the other end of resistance R8a, the other end of resistance R14a and resistance R11 is connected to the C portion of chip U1 together
9th pin；The other end of resistance R11 and the other end of resistance R9 are connected to the 8th pin of the C portion of chip U1；Resistance R13's
The other end, the other end of capacitor C5, capacitor C1 the other end, the other end of capacitor C2, the other end of capacitor C39, connector
CONVIN the 1st, the 2nd pin is grounded and the 4th pin of four-wire ohm R27, chip U1 C portion the 10th pin, core
12nd pin of the part D of piece U1 is grounded.
The chip U1 is model TL074CDR；The chip U2 is IC74HCT4053；The chip U3 is K78050；
The photoelectrical coupler T1 model TPL181；The DC/DC converter B1, the DC/DC converter B2 are 4 pin sockets；
The connector CN11, the connector CN12 are 2 pin sockets；The connector CON5P is 5 pin sockets；The connection
Device CONVIN is 3 pin sockets；The resistance R27 is four-wire ohm MT4；The triode Q1a, the triode Q1 are NPN
Type triode, the high power tube Q2 are PNP type triode.
Said chip is commercial chip, and being specifically defined just to be not added with function of each pin repeats, chip U1 on circuit diagram
Part A, the part B of chip U1, the C portion of chip U1, chip U1 D part respectively with U1A, U1B, U1C, U1D mark.
Constant voltage power supply circuit unit: the power supply that the DC power supply for coming in through CN11 is come in by diode D5 is through DC/
The 1st pin of DC converter B2 inputs, and constant voltage source Vo+ is exported from the 4th pin of B2, to the 4th pin powered of chip U1.Electricity
Source is inputted by the 1st pin of DC/DC converter B1, is converted into constant voltage source Vo- from the output of the 3rd pin of B1, is given chip U1
The 11st pin powered.Power supply generates a 5V constant voltage source Vout by voltage stabilizing chip U3 and powers to chip U2.
5V-0V analog signal control circuit unit: pwm signal is entered in the 1st pin of photoelectrical coupler T1 by R1, by
The 6th pin of photoelectrical coupler T1 pulls up resistance R6 a to Vout, generates the PWM1 letter of an external PWM signal opposite in phase
Number, and this pwm signal is connected in the 11st pin S1 control port of chip U2；The constant voltage source Vo- that B1 is generated is through resistance
R2 and R3 is grounded through voltage-stabiliser tube D2, diode D1 again, and capacitor C4 and C3 play filter action, generates reference voltage Vref-, reference
Voltage Vref- and resistance R16 is connected in the 2nd pin of negative input of U1A；The analog signal ANA_IN of 5V-0V passes through resistance
R26 and R15 is connected to be compared in the 2nd pin of positive input of U1A with reference voltage Vref-the two after exported by U1A
The 1st pin is held to export 0V-1.74V analog control signal, 0V-1.74V analog control signal and the 12nd pin input end of chip U2
14th pin output end 1Z of mouth 1Y0 connection, chip U2 connects by resistance R12 with the 5th pin positive input of U1B.Core
Piece U2 control port S1 reception PWM1 signal, which is connected to chip U2 output port 1Z with 1Y1 or 1Y0, to be switched over, to reach switch
The effect of the analog signal of 0V-1.74V.
LED light constant-current drive circuit unit: the part C, D composition sample circuit of chip U1, sampled voltage is from four-wire ohm
The 2nd pin of R27 is input to the 13rd pin of negative input of chip U1D again by the 14th pin of the output end of U1D through resistance R8
It is connected to the 9th pin of negative input of U1C through resistance R14a, then sampled voltage is exported by the 8th pin of output port of U1C, adopts
Sample voltage is connected to the 6th pin of negative input of U1B through resistance R9；0V-1.74V analog signal is being connected to comparator U1B just
It is compared, obtains from the input of the 6th pin of comparator U1B negative input with sampling reflux voltage again to the 5th pin of input terminal
Analog control signal is exported from the 7th pin of output end of comparator U1B to be entered in triode Q1a through diode D4, to control
Triode Q1a, Q1, the switch of power tube Q2.
So that chip U2 output end 1Z is connected with 1Y0 after pwm signal opening, analog signal 5V to 0V is adjusted, with mould
Quasi- signal becomes smaller, and the brightness of LED light is also linear to brighten, and when analog signal is 0V, LED light reaches most bright, flows through the electricity of LED
Stream is maximum.
Design has the signal of output PWM to carry out switch control, output voltage simulation letter to LED in master board of the invention
Number brightness is controlled.The circuit can effectively control LED lamp according to the analog signal of input and shine, light emission luminance and mould
Quasi- signal is linear.Available pwm signal carries out the length of time of control LED light switch, and the simulation of available 5V-0V simultaneously
Signal carries out LED light brightness regulation, the brightness and the inversely proportional linear relationship of voltage analog signal of LED.
The above description is only a preferred embodiment of the present invention, thus it is all according to the configuration described in the scope of the patent application of the present invention,
The equivalent change or modification that feature and principle are done, is included in the scope of the patent application of the present invention.
Claims (5)
1. a kind of LED drive control circuit of tunable optical, it is characterised in that: including constant voltage power supply circuit unit, 5V-0V simulation letter
Number control circuit unit and LED light constant-current drive circuit unit；Constant voltage power supply circuit unit is turned by voltage stabilizing chip U3, DC/DC
Change device B1, DC/DC converter B2 and its connection circuit composition；5V-0V analog signal control circuit unit is by analog switch chip
U2, the part A of amplifier chip U1, photoelectrical coupler T1 and its connection circuit composition；LED light constant-current drive circuit unit is by putting
The part B of big device chip U1, the C portion of amplifier chip U1, the part D of amplifier chip U1 and its connection circuit composition；
The anode connection of the 1st pin and diode D5 of connector CN11；The cathode of diode D5, the one end capacitor C11, capacitor
One end of C10, the 1st pin of connector CN12, one end of capacitor C31 and one end of capacitor C32 are connected to chip U3 together
1st pin, the 2nd pin of chip U3, one end of capacitor C33, one end of capacitor C34, one end of capacitor C36 and capacitor C37
One end is connected to the 16th pin of chip U2 together, while being connected to photoelectrical coupler after the 2nd pin serial connection resistance R6 of chip U3
The 6th pin of T1；The cathode of diode D5, the one end capacitor C11, one end of capacitor C10, connector CN12 the 1st pin, capacitor
One end of C27 and one end of capacitor C28 are connected to the 1st pin of DC/DC converter B2 together, and the 4th of DC/DC converter B2 the
Pin, one end of capacitor C29, one end of capacitor C30, one end of capacitor C35 and capacitor C38 one end be connected to resistance together
One end of one end of R24, the other end of resistance R24 and capacitor C13, capacitor C14 one end part A of access chip U1 together
4th pin；The cathode of diode D5, the one end capacitor C11, one end of capacitor C10, the 1st pin of connector CN12, capacitor C6
One end and one end of capacitor C7 are connected to the 1st pin of DC/DC converter B1 together, the 3rd pin of DC/DC converter B1,
One end of capacitor C8, one end of capacitor C9 are connected to one end of resistance R25 together, and the one of the other end of resistance R25 and capacitor C15
End, capacitor C16 one end part A of access chip U1 together the 11st pin；The 3rd pin of DC/DC converter B1 simultaneously and
One end connection of one end, resistance R3 of resistance R2；The other end of capacitor C6, the other end of capacitor C7, capacitor C8 the other end, electricity
Hold the other end of C9, the other end of capacitor C10, the other end of capacitor C11, the other end of capacitor C13, capacitor C14 the other end,
The other end of capacitor C15, the other end of capacitor C16, the other end of capacitor C27, the other end of capacitor C28, capacitor C29 it is another
End, the other end of capacitor C30, the other end of capacitor C31, the other end of capacitor C32, the other end of capacitor C33, capacitor C34
The other end, the other end of capacitor C35, the other end of capacitor C36, the other end of capacitor C37, the other end of capacitor C38, connector
The 2nd pin of CN12, the 3rd pin of chip U3, the 2nd pin of DC/DC converter B1, the 4th pin and DC/DC converter B2
2nd pin, the 3rd pin are grounded；
The 3rd pin of DC/DC converter B1 is connected with one end of one end of resistance R2, resistance R3 simultaneously；The other end of resistance R2,
One end of resistance R3, one end of capacitor C4, the anode of zener diode D2, one end of capacitor C3 and resistance R31 one end one
And it is connected to one end of resistance R16, the cathode of zener diode D2 is connected with the cathode of diode D1；The other end of resistance R16,
One end of resistance R15 and one end of resistance R17 are connected to the 2nd pin of the part A of chip U1 together；Resistance R15's is another
End, one end of resistance R26, capacitor C20 one end connected with one end of capacitor C24；3rd pin serial connection of the part A of chip U1
It is grounded after resistance R18；1st pin of the part A of the other end and chip U1 of resistance R17 is connected to the 12nd of chip U2 together and draws
Foot, the 12nd pin of chip U2 are connected to one end of resistance R12, and the 11st pin of chip U2 is connected to the of photoelectrical coupler T1
6 pins；One end of the 1st pin connection resistance R1 of photoelectrical coupler T1 and one end of capacitor C21, the other end of resistance R1 connect
It is connected to the 4th pin of connector CON5P, the 5th pin of connector CON5P is connected to the other end of resistance R26；Diode D1's
Anode, the other end of capacitor C3, the other end of capacitor C4, the other end of capacitor C20, the other end of capacitor C24, capacitor C21's
The other end, the 1st to the 10th pin, the 13rd pin, the 15th pin of chip U2, photoelectrical coupler T1 the 3rd, the 4th pin, connection
Device CON5P the 1st, the 2nd, the 3rd pin is grounded；
The other end of resistance R12, the other end of resistance R31, one end of resistance R13 and capacitor C5 one end be connected to core together
5th pin of the part B of piece U1；One end of resistance R7 capacitor C19b capacitor C23 parallel connection and one end of resistance R9 are connected to together
6th pin of the part B of chip U1；The other end and resistance R10 capacitor C19c of resistance R7 capacitor C19b capacitor C23 parallel connection are in parallel
One end be connected to together chip U1 part B the 7th pin；The other end series diode of resistance R10 capacitor C19c parallel connection
The base stage of triode Q1a is accessed after D4, resistance R4；The emitter of triode Q1a and one end of resistance R23 are connected to triode Q1
Base stage；One end of the collector of triode Q1a, the collector of triode Q1 and resistance R19 is connected to the base stage of triode Q2；
The emitter of triode Q2, the other end of resistance R19, one end of capacitor C39, one end of capacitor C1, capacitor C2 one end and
One end of resistance R28 is connected to the 3rd pin of connector CONVIN together, and the other end of resistance R28 connects diode VinLED
After be grounded；The collector of triode Q2, the emitter of triode Q1, the other end of resistance R23 and resistance R30 resistance R29 electricity
The one end for holding C26 capacitor C25 parallel connection is connected to the anode of load LED lamp lamp LED_OUT together；Load LED lamp lamp LED_OUT's
Cathode and the other end of resistance R30 resistance R29 capacitor C26 capacitor C25 parallel connection are connected to the 1st pin of four-wire ohm R27 together；
The 2nd pin of four-wire ohm R27, one end of capacitor C18 are connected with one end of resistance R8；The other end and resistance R14 of resistance R8
One end be connected to chip U1 the part D the 13rd pin；The other end of resistance R14 and one end of resistance R14a are connected to chip
14th pin of the part D of U1；The 3rd pin of four-wire ohm R27, the other end of capacitor C18 are connected with one end of resistance R8a；
What one end of the other end of resistance R8a, the other end of resistance R14a and resistance R11 was connected to the C portion of chip U1 together the 9th draws
Foot；The other end of resistance R11 and the other end of resistance R9 are connected to the 8th pin of the C portion of chip U1；Resistance R13's is another
End, the other end of capacitor C5, capacitor C1 the other end, the other end of capacitor C2, the other end of capacitor C39, connector CONVIN
The 1st, the 2nd pin is grounded and the 4th pin of four-wire ohm R27, the 10th pin of the C portion of chip U1, chip U1 D
The 12nd partial pin is grounded.
2. a kind of LED drive control circuit of tunable optical according to claim 1, it is characterised in that: the chip U1 is
Model TL074CDR；The chip U2 is IC74HCT4053；The chip U3 is K78050；The photoelectrical coupler T1 model
For TPL181.
3. a kind of LED drive control circuit of tunable optical according to claim 1, it is characterised in that: the DC/DC conversion
Device B1, the DC/DC converter B2 are 4 pin sockets；The connector CN11, the connector CN12 are 2 pin sockets；Institute
Stating connector CON5P is 5 pin sockets；The connector CONVIN is 3 pin sockets.
4. a kind of LED drive control circuit of tunable optical according to claim 1, it is characterised in that: the resistance R27 is
Four-wire ohm MT4.
5. a kind of LED drive control circuit of tunable optical according to claim 1, it is characterised in that: the triode
Q1a, the triode Q1 are NPN type triode, and the high power tube Q2 is PNP type triode.
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| CN201811154164.4A CN109104795B (en) | 2018-09-30 | 2018-09-30 | Dimmable LED drive control circuit |
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|---|---|---|---|
| CN201811154164.4A CN109104795B (en) | 2018-09-30 | 2018-09-30 | Dimmable LED drive control circuit |
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| CN109104795B CN109104795B (en) | 2023-12-22 |
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| CN109104795B (en) | 2023-12-22 |
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