CN107148111B - A kind of LED control circuit of multiple-channel output - Google Patents
A kind of LED control circuit of multiple-channel output Download PDFInfo
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- CN107148111B CN107148111B CN201710386563.2A CN201710386563A CN107148111B CN 107148111 B CN107148111 B CN 107148111B CN 201710386563 A CN201710386563 A CN 201710386563A CN 107148111 B CN107148111 B CN 107148111B
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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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
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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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The present invention relates to the technical fields of LED control circuit, refer in particular to a kind of LED control circuit of multiple-channel output.It includes current rectifying and wave filtering circuit, constant current conversion control circuit, low voltage protection circuit, LED access control module, voltage regulator circuit, pwm control circuit and adjusting control circuit；The constant current conversion control circuit and voltage regulator circuit are electrically connected with current rectifying and wave filtering circuit respectively; the LED access control module and low voltage protection circuit are electrically connected with constant current conversion control circuit respectively, and the pwm control circuit is electrically connected with constant current conversion control circuit, voltage regulator circuit and adjusting control circuit respectively.The LED control of multiple-channel output of its of the invention circuit simple realization, is accessed convenient for LED multi-path.
Description
Technical field
The present invention relates to the technical fields of LED control circuit, refer in particular to a kind of LED control circuit of multiple-channel output.
Background technique
Currently, having become people since LED light has the characteristics that low energy consumption, long service life and safety and environmental protection
One of the main product of life lighting.With the continuous improvement that the universal and people of LED require illuminating effect, to LED electricity
Source brings new challenge.Wherein, the LED lamp of multiple-channel output is in access at present, the meeting in the case where lacking protection circuit
Influence the normal use of LED lamp, and at present can the LED control circuit of multiple-channel output its structure is complicated, be not easy to multiple-channel output
The access of LED lamp.
Summary of the invention
The present invention provides a kind of LED control circuit of multiple-channel output for problem of the prior art.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
A kind of LED control circuit of multiple-channel output provided by the invention includes current rectifying and wave filtering circuit, constant current conversion and control
Circuit, low voltage protection circuit, LED access control module, voltage regulator circuit, pwm control circuit and adjusting control circuit；The perseverance
Stream conversion control circuit and voltage regulator circuit are electrically connected with current rectifying and wave filtering circuit respectively, the LED access control module and low-voltage
Protection circuit be electrically connected respectively with constant current conversion control circuit, the pwm control circuit respectively with constant current conversion control circuit, surely
Volt circuit and adjusting control circuit electrical connection.
Wherein, the current rectifying and wave filtering circuit includes diode D1, diode D2, diode D3, diode D4, diode
D5, diode D6, capacitor C1 and capacitor EC1, the capacitor C1 and capacitor EC1 parallel connection, the diode D3 and diode D5's
Cathode is connect with the anode of diode D6 respectively, and the cathode of the diode D6 is connect with voltage regulator circuit.
Wherein, the constant current conversion control circuit include chip U1, diode D7, inductance L1, resistance R1, resistance R2,
Resistance R3, resistance R13, the chip U1 include pin FB, pin NC, pin VIN, pin BST, pin GND, pin EN,
Pin DIM and pin SW；The pin GND is connect with the anode of diode D7, and the cathode of the diode D7 is with inductance L1's
The other end of one end connection, the inductance L1 is connect with LED access control module；The pin EN and low voltage protection circuit connect
It connects；The pin SW is connect by capacitor C2 with pin BST；The pin VIN is connect with the anode of capacitor C1, the chip U1
The 9th pin connect with the cathode of capacitor C1, the pin FB and LED access control module are connect.
Wherein, the LED access control module includes capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor
C9, bidirectional trigger diode Q1, bidirectional trigger diode Q2, bidirectional trigger diode Q3, bidirectional trigger diode Q4, two-way touching
Send out diode Q5, bidirectional trigger diode Q6, zener diode Z1, zener diode Z2, zener diode Z3, zener diode
Z4, zener diode Z5, zener diode Z6, LED control terminal DC2, LED control terminal DC3, LED control terminal DC4, LED control terminal
The anode of DC5 and LED control terminal DC6, the LED control terminal DC2 are connect with one end of bidirectional trigger diode Q1, the LED
The cathode of control terminal DC2 is connect with the other end of bidirectional trigger diode Q1, the bidirectional trigger diode Q1 and the pressure stabilizing
Pipe Z1 is in parallel, and the bidirectional trigger diode Q1 is in parallel with the capacitor C4；Anode and the two-way touching of the LED control terminal DC3
One end connection of diode Q2 is sent out, the cathode of the LED control terminal DC3 is connect with the other end of bidirectional trigger diode Q2, institute
It is in parallel with the voltage-stabiliser tube Z2 to state bidirectional trigger diode Q2, the bidirectional trigger diode Q2 is in parallel with the capacitor C5；Institute
State LED control terminal DC4 anode connect with one end of bidirectional trigger diode Q3, the cathode of the LED control terminal DC4 with it is two-way
The other end of diac Q3 connects, and the bidirectional trigger diode Q3 is in parallel with the voltage-stabiliser tube Z3, the two-way triggering
Diode Q3 is in parallel with the capacitor C6；The anode of the LED control terminal DC5 is connect with one end of bidirectional trigger diode Q4,
The cathode of the LED control terminal DC5 is connect with the other end of bidirectional trigger diode Q4, the bidirectional trigger diode Q4 and institute
It is in parallel to state voltage-stabiliser tube Z4, the bidirectional trigger diode Q4 is in parallel with the capacitor C7；The LED control terminal DC6 anode with
One end of bidirectional trigger diode Q5 connects, and the cathode of the LED control terminal DC6 and the other end of bidirectional trigger diode Q5 connect
It connects, the bidirectional trigger diode Q5 is in parallel with the voltage-stabiliser tube Z5, and the bidirectional trigger diode Q5 and the capacitor C8 are simultaneously
Connection；The anode of the LED control terminal DC7 is connect with one end of bidirectional trigger diode Q6, the cathode of the LED control terminal DC7
It is connect with the other end of bidirectional trigger diode Q6, the bidirectional trigger diode Q6 is in parallel with the voltage-stabiliser tube Z6, described double
It is in parallel with the capacitor C9 to diac Q6；It is in parallel between the LED access control module and constant current conversion control circuit
There are capacitor C3 and capacitor EC2.
Wherein, the low voltage protection circuit includes reset button S1, triode Q9, resistance R16 and resistance R17, institute
State the emitter connection of one end triode Q9 of reset button S1, the other end of the reset button S1 and the current collection of triode Q9
Pole connection, the emitter of the triode Q9 are connect with the pin EN of chip U1, and one end of the resistance R16 is with triode Q9's
Base stage connection, the other end of the resistance R16 are connect with the anode of capacitor C1, and one end of the resistance R17 is with triode Q9's
Base stage connection, the other end of the resistance R17 are connect with the cathode of capacitor C1, and the collector of the triode Q9 is with capacitor C1's
Cathode connection.
Wherein, the pwm control circuit includes chip U2, resistance R7, resistance R8 and capacitor C13, the chip U2's
1st pin is connect with voltage regulator circuit, and the resistance R8 is in parallel with capacitor C13, the 7th pin of the chip U2 and the one of resistance R8
End connection, the other end of the resistance R8 are connect with voltage regulator circuit；The 7th pin of the chip U2 and one end of resistance R7 connect
It connects, the other end of the resistance R8 is connect with voltage regulator circuit；Resistance R6 is provided between the voltage regulator circuit and resistance R7；It is described
The 5th pin of chip U2 is connect by resistance R13 with the pin DIM of chip U1.
Wherein, the voltage regulator circuit includes triode Q7, resistance R4, voltage-stabiliser tube Z7, capacitor C10, resistance R5, voltage-stabiliser tube
Z8, capacitor EC4, capacitor C12 and capacitor EC5, the cathode of the diode D6 are connect with the collector of triode Q7, the resistance
One end of R4 is connect with the collector of triode Q7, and the other end of the resistance R4 is connect with the base stage of triode Q7, and described three
The emitter of pole pipe Q7 is connect by capacitor C10 and voltage-stabiliser tube Z7 with the base stage of triode Q7；One end and three of the resistance R5
The emitter of pole pipe Q7 connects, and the other end of the resistance R5 is connect with the 1st pin of chip U2, the other end of the resistance R5
It is connect with the cathode of voltage-stabiliser tube Z8, the anode of the capacitor EC5 is connect with the collector of triode Q7, and the capacitor EC5's is negative
Pole is connect with the anode of voltage-stabiliser tube Z8, and the voltage-stabiliser tube Z8, capacitor EC4, capacitor C12 are parallel with one another.
Wherein, the adjusting control circuit includes variable potentiometer VR1, triode Q8, voltage-stabiliser tube Z9, capacitor C14, electricity
It hinders R10, resistance R11 and resistance R12, the variable potentiometer VR1 is connect by resistance R11 with the base stage of triode Q8；It is described
Variable potentiometer VR1 connect by resistance R12 with the emitter of triode Q8, the variable potentiometer VR1 pass through resistance R10 and
The collector of triode Q8 connects, and the collector of the triode Q8 is connect with the cathode of voltage-stabiliser tube Z9, the triode Q8's
Emitter is connect with the anode of voltage-stabiliser tube Z9, and the cathode of the voltage-stabiliser tube Z9 is connected by the emitter of resistance R6 and triode Q7
It connects, the anode of the voltage-stabiliser tube Z9 is connect with the anode of voltage-stabiliser tube Z8.
Beneficial effects of the present invention:
A kind of LED control circuit of multiple-channel output provided by the invention, the control function with multiple-channel output, input can be with
It is powered using AD or DC, the current rectifying and wave filtering circuit can carry out rectification or dipole inversion, the LED access control to input current
There is molding block the band of LED lamp to be electrically accessed protection, and output circuit LED automatically accesses next paths of LEDs power supply when opening a way, described low
Voltage protection circuit has allows the LED lamp in access LED access control module to start point when LED lamp band is electrically accessed protection
Bright function, input supply voltage it is too low when have under-voltage protection, prevent input voltage it is too low cause input current excessive or
LED lamp flashing；The adjusting control circuit can dim the LED LED lamp for accessing control module, its electricity of the present invention
The LED control of road simple realization multiple-channel output, is accessed convenient for LED multi-path.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of the LED control circuit of multiple-channel output of the invention.
Appended drawing reference in Fig. 1 includes:
1-current rectifying and wave filtering circuit 2-constant current conversion control circuit
3-4-LED of low voltage protection circuit access control module
5-6-pwm control circuits of voltage regulator circuit
7-adjusting control circuits.
Specific embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further below with reference to embodiment and attached drawing
Bright, the content that embodiment refers to not is limitation of the invention.Below in conjunction with attached drawing, 1 couple of present invention is described in detail.
A kind of LED control circuit of multiple-channel output described in the present embodiment includes current rectifying and wave filtering circuit 1, constant current conversion
Control circuit 2, low voltage protection circuit 3, LED access control module 4, voltage regulator circuit 5, pwm control circuit 6 and brightness adjustment control electricity
Road 7；The constant current conversion control circuit 2 and voltage regulator circuit 5 are electrically connected with current rectifying and wave filtering circuit 1 respectively, the LED access control
Module 4 and low voltage protection circuit 3 are electrically connected with constant current conversion control circuit 2 respectively, the pwm control circuit 6 respectively with perseverance
Conversion control circuit 2, voltage regulator circuit 5 and adjusting control circuit 7 is flowed to be electrically connected.Specifically, a kind of multichannel provided by the invention is defeated
LED control circuit out, the control function with multiple-channel output, input can be powered using AD or DC, the rectifying and wave-filtering electricity
Road 1 can carry out rectification or dipole inversion to input current, and there is the LED access control module 4 band of LED lamp to be electrically accessed
Protection, output circuit LED automatically access next paths of LEDs power supply when opening a way, the low voltage protection circuit 3 has in LED lamp
Band, which is electrically accessed, allows the LED lamp in access LED access control module 4 to start light function when protection, in input supply voltage mistake
There is under-voltage protection when low, prevent input voltage is too low from causing input current excessive or LED lamp flashing；The brightness adjustment control
Circuit 7 can dim the LED LED lamp for accessing control module 4, its of the invention circuit simple realization multiple-channel output
LED control.
A kind of LED control circuit of multiple-channel output described in the present embodiment, the current rectifying and wave filtering circuit 1 includes diode
D1, diode D2, diode D3, diode D4, diode D5, diode D6, capacitor C1 and capacitor EC1, the capacitor C1 and
Capacitor EC1 is in parallel, and the cathode of the diode D3 and diode D5 are connect with the anode of diode D6 respectively, the diode D6
Cathode connect with voltage regulator circuit 5.Specifically, pass through diode diode D1, diode D2, diode D3 and diode D4 shape
At bridge rectifier, rectification or dipole inversion are carried out to input current to realize, wherein electricity can be prevented by diode D5
Stream is flow backwards, and the capacitor C1 and capacitor EC1 play the role of filtering.
A kind of LED control circuit of multiple-channel output described in the present embodiment, the constant current conversion control circuit 2 includes core
Piece U1, diode D7, inductance L1, resistance R1, resistance R2, resistance R3, resistance R13, the chip U1 include pin FB, pin
NC, pin VIN, pin BST, pin GND, pin EN, pin DIM and pin SW；The anode of the pin GND and diode D7
Connection, the cathode of the diode D7 are connect with one end of inductance L1, and the other end and LED of the inductance L1 accesses control module
4 connections；The pin EN is connect with low voltage protection circuit 3；The pin SW is connect by capacitor C2 with pin BST；It is described
The anode of pin VIN and capacitor C1 connects, and the 9th pin of the chip U1 is connect with the cathode of capacitor C1, the pin FB and
LED accesses control module 4 and connects.Specifically, the model MP4688 of the chip U1；The constant current conversion control circuit 2 is logical
The cooperation between chip U1 is crossed, realizes rectifying and voltage-stabilizing after constant current constant voltage and transformation, purpose is provided to protection LED access control mould
The normal use of block 4.
A kind of LED control circuit of multiple-channel output described in the present embodiment, the LED access control module 4 includes electricity
Hold C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, bidirectional trigger diode Q1, bidirectional trigger diode Q2, double
To diac Q3, bidirectional trigger diode Q4, bidirectional trigger diode Q5, bidirectional trigger diode Q6, zener diode
Z1, zener diode Z2, zener diode Z3, zener diode Z4, zener diode Z5, zener diode Z6, LED control terminal
DC2, LED control terminal DC3, LED control terminal DC4, LED control terminal DC5, LED control terminal DC6 and LED control terminal DC7, the LED
The anode of control terminal DC2 is connect with one end of bidirectional trigger diode Q1, the cathode of the LED control terminal DC2 and two-way triggering
The other end of diode Q1 connects, and the bidirectional trigger diode Q1 is in parallel with the voltage-stabiliser tube Z1, two-way two pole of triggering
Pipe Q1 is in parallel with the capacitor C4；The anode of the LED control terminal DC3 is connect with one end of bidirectional trigger diode Q2, described
The cathode of LED control terminal DC3 is connect with the other end of bidirectional trigger diode Q2, the bidirectional trigger diode Q2 and described steady
Pressure pipe Z2 is in parallel, and the bidirectional trigger diode Q2 is in parallel with the capacitor C5；The LED control terminal DC4 anode with it is two-way
One end of diac Q3 connects, and the cathode of the LED control terminal DC4 is connect with the other end of bidirectional trigger diode Q3,
The bidirectional trigger diode Q3 is in parallel with the voltage-stabiliser tube Z3, and the bidirectional trigger diode Q3 is in parallel with the capacitor C6；
The LED control terminal DC5 anode connect with one end of bidirectional trigger diode Q4, the cathode of the LED control terminal DC5 with pair
It is connected to the other end of diac Q4, the bidirectional trigger diode Q4 is in parallel with the voltage-stabiliser tube Z4, the two-way touching
It is in parallel with the capacitor C7 to send out diode Q4；The anode of the LED control terminal DC6 connects with one end of bidirectional trigger diode Q5
It connects, the cathode of the LED control terminal DC6 is connect with the other end of bidirectional trigger diode Q5, the bidirectional trigger diode Q5
In parallel with the voltage-stabiliser tube Z5, the bidirectional trigger diode Q5 is in parallel with the capacitor C8；The LED control terminal DC7 is just
Pole is connect with one end of bidirectional trigger diode Q6, and the cathode of the LED control terminal DC7 is another with bidirectional trigger diode Q6's
End connection, the bidirectional trigger diode Q6 is in parallel with the voltage-stabiliser tube Z6, the bidirectional trigger diode Q6 and the capacitor
C9 is in parallel；Capacitor C3 and capacitor EC2 are parallel between the LED access control module 4 and constant current conversion control circuit 2.Specifically
Ground, LED control terminal DC2, LED control terminal DC3, LED control terminal DC4, LED control terminal DC5, LED control terminal DC6 and LED control
Hold DC7 as output end；When LED control terminal DC2, LED control terminal DC3, LED control terminal DC4, LED control terminal DC5, LED controls
When holding one of LED control terminal open circuit in DC6 and LED control terminal DC7, the voltage at LED control terminal both ends will be increased to
The zener diode Z1, zener diode Z2, zener diode Z3, zener diode Z4, zener diode Z5 and pressure stabilizing two
The trigger point voltage of pole pipe Z6, it is the zener diode Z1, zener diode Z2, zener diode Z3, zener diode Z4, steady
Diode Z5, zener diode Z6 conducting are pressed, and then triggers bidirectional trigger diode Q1, bidirectional trigger diode Q2, two-way touching
Send out diode Q3, bidirectional trigger diode Q4, bidirectional trigger diode Q5, bidirectional trigger diode Q6 conducting, LED access control
Circuit is constituted between module 4 and constant current conversion control circuit 2, it is working properly.
A kind of LED control circuit of multiple-channel output described in the present embodiment, the low voltage protection circuit 3 include to reset
The emitter of one end triode Q9 of button S1, triode Q9, resistance R16 and resistance R17, the reset button S1 connect, institute
The other end for stating reset button S1 is connect with the collector of triode Q9, the emitter of the triode Q9 and the pin of chip U1
One end of EN connection, the resistance R16 is connect with the base stage of triode Q9, and the other end and capacitor C1 of the resistance R16 is just
Pole connection, one end of the resistance R17 are connect with the base stage of triode Q9, the other end of the resistance R17 and bearing for capacitor C1
Pole connection, the collector of the triode Q9 are connect with the cathode of capacitor C1.Specifically, the output protection of the reset button S1
Reset button afterwards, after clicking reset button S1, LED control terminal will export again, and originally triggering enters protection conducting
Bidirectional trigger diode Q1, bidirectional trigger diode Q2, bidirectional trigger diode Q3, bidirectional trigger diode Q4, two-way touching
Hair diode Q5, bidirectional trigger diode Q6 would be at opening a way, wherein by resistance R16 and resistance R17 to output voltage into
Row detects and divides the base stage for being input to triode Q9, when the branch pressure voltage of the base stage of triode Q9 can point greater than leading for emitter
When voltage, the triode Q9 cut-off is not turned on；When the branch pressure voltage of the base stage of triode Q9 is greater than the emitter of triode Q9
Lead when can put voltage, the triode Q9 conducting drags down the EN foot of chip U1, so that chip U1 stops working without output to reach
To the function of under-voltage protection.
A kind of LED control circuit of multiple-channel output described in the present embodiment, the pwm control circuit 6 include chip U2,
Resistance R7, resistance R8 and capacitor C13, the 1st pin of the chip U2 are connect with voltage regulator circuit 5, the resistance R8 and capacitor C13
7th pin of parallel connection, the chip U2 is connect with one end of resistance R8, and the other end of the resistance R8 is connect with voltage regulator circuit 5；
The 7th pin of the chip U2 is connect with one end of resistance R7, and the other end of the resistance R8 is connect with voltage regulator circuit 5；It is described
Resistance R6 is provided between voltage regulator circuit 5 and resistance R7；The 5th pin of the chip U2 is drawn by resistance R13 and chip U1's
Foot DIM connection.Specifically, the model PIC12F1501 of the chip U2；DC DC simulation voltage is through resistance R7 and resistance R8
Chip U2 is inputted by the 7th pin of chip U2 after partial pressure, the chip U2 can be converted into DC DC simulation voltage corresponding
PWM, the pin DIM through chip U1 then carry out dimming LED access control module 4.
A kind of LED control circuit of multiple-channel output described in the present embodiment, the voltage regulator circuit 5 include triode Q7,
Resistance R4, voltage-stabiliser tube Z7, capacitor C10, resistance R5, voltage-stabiliser tube Z8, capacitor EC4, capacitor C12 and capacitor EC5, the diode D6
Cathode connect with the collector of triode Q7, one end of the resistance R4 is connect with the collector of triode Q7, the resistance
The other end of R4 is connect with the base stage of triode Q7, and the emitter of the triode Q7 passes through capacitor C10 and voltage-stabiliser tube Z7 and three
The base stage of pole pipe Q7 connects；One end of the resistance R5 is connect with the emitter of triode Q7, the other end of the resistance R5 with
The 1st pin of chip U2 connects, and the other end of the resistance R5 is connect with the cathode of voltage-stabiliser tube Z8, the anode of the capacitor EC5
It is connect with the collector of triode Q7, the cathode of the capacitor EC5 is connect with the anode of voltage-stabiliser tube Z8, the voltage-stabiliser tube Z8, electricity
It is parallel with one another to hold EC4, capacitor C12.Specifically, the voltage regulator circuit 5 provides 0-10V light modulation electricity after carrying out pressure stabilizing to input voltage
The operating voltage of pressure and chip U2.
A kind of LED control circuit of multiple-channel output described in the present embodiment, the adjusting control circuit 7 includes can power transformation
Position device VR1, triode Q8, voltage-stabiliser tube Z9, capacitor C14, resistance R10, resistance R11 and resistance R12, the variable potentiometer VR1
It is connect by resistance R11 with the base stage of triode Q8；The variable potentiometer VR1 passes through the transmitting of resistance R12 and triode Q8
Pole connection, the variable potentiometer VR1 are connect by resistance R10 with the collector of triode Q8, the current collection of the triode Q8
Pole is connect with the cathode of voltage-stabiliser tube Z9, and the emitter of the triode Q8 is connect with the anode of voltage-stabiliser tube Z9, the voltage-stabiliser tube Z9
Cathode connect with the emitter of triode Q7 by resistance R6, the anode of the voltage-stabiliser tube Z9 connects with the positive of voltage-stabiliser tube Z8
It connects.Specifically, change the conducting depth of triode Q8 by the base current of variable potentiometer VR1 adjusting triode Q8,
And triode Q8 is connect in the dimmer voltage of output 10V, is changed the conducting depth of triode Q8, is exported the light modulation of 10V
The size of voltage can also change, and then reach dimming function.
The above is only present pre-ferred embodiments, is not intended to limit the present invention in any form, although
The present invention is disclosed as above with preferred embodiment, and however, it is not intended to limit the invention, any person skilled in the art,
It does not depart within the scope of technical solution of the present invention, when the technology contents using the disclosure above make a little change or are modified to equivalent change
The equivalent embodiment of change, but without departing from the technical solutions of the present invention, technology refers to above embodiments according to the present invention
Made any simple modification, equivalent change and modification, belong in the range of technical solution of the present invention.
Claims (5)
1. a kind of LED control circuit of multiple-channel output, it is characterised in that: include current rectifying and wave filtering circuit, constant current conversion and control electricity
Road, low voltage protection circuit, LED access control module, voltage regulator circuit, pwm control circuit and adjusting control circuit；The constant current
Conversion control circuit and voltage regulator circuit are electrically connected with current rectifying and wave filtering circuit respectively, and the LED access control module and low-voltage are protected
Protection circuit is electrically connected with constant current conversion control circuit respectively, the pwm control circuit respectively with constant current conversion control circuit, pressure stabilizing
Circuit and adjusting control circuit electrical connection；
The current rectifying and wave filtering circuit includes diode D1, diode D2, diode D3, diode D4, diode D5, diode
D6, capacitor C1 and capacitor EC1, the capacitor C1 and capacitor EC1 are in parallel, the cathode of the diode D3 and diode D5 respectively with
The anode connection of diode D6, the cathode of the diode D6 are connect with voltage regulator circuit；
The constant current conversion control circuit includes chip U1, diode D7, inductance L1, resistance R1, resistance R2, resistance R3, electricity
Hinder R13, the chip U1 include pin FB, pin NC, pin VIN, pin BST, pin GND, pin EN, pin DIM and
Pin SW；The pin GND is connect with the anode of diode D7, and the cathode of the diode D7 is connect with one end of inductance L1,
The other end of the inductance L1 is connect with LED access control module；The pin EN is connect with low voltage protection circuit；It is described to draw
Foot SW is connect by capacitor C2 with pin BST；The pin VIN is connect with the anode of capacitor C1, the 9th pin of the chip U1
It is connect with the cathode of capacitor C1, the pin FB is connect with LED access control module；
The low voltage protection circuit includes reset button S1, triode Q9, resistance R16 and resistance R17, the reset button
The emitter of one end triode Q9 of S1 connects, and the other end of the reset button S1 is connect with the collector of triode Q9, institute
The emitter for stating triode Q9 is connect with the pin EN of chip U1, and one end of the resistance R16 is connect with the base stage of triode Q9,
The other end of the resistance R16 is connect with the anode of capacitor C1, and one end of the resistance R17 is connect with the base stage of triode Q9,
The other end of the resistance R17 is connect with the cathode of capacitor C1, and the collector of the triode Q9 is connect with the cathode of capacitor C1.
2. a kind of LED control circuit of multiple-channel output according to claim 1, it is characterised in that: the LED access control
Module includes capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, bidirectional trigger diode Q1, two-way triggering
Diode Q2, bidirectional trigger diode Q3, bidirectional trigger diode Q4, bidirectional trigger diode Q5, bidirectional trigger diode Q6,
Zener diode Z1, zener diode Z2, zener diode Z3, zener diode Z4, zener diode Z5, zener diode
Z6, LED control terminal DC2, LED control terminal DC3, LED control terminal DC4, LED control terminal DC5, LED control terminal DC6 and LED control
DC7 is held, the anode of the LED control terminal DC2 is connect with one end of bidirectional trigger diode Q1, and the LED control terminal DC2's is negative
Pole is connect with the other end of bidirectional trigger diode Q1, and the bidirectional trigger diode Q1 is in parallel with the voltage-stabiliser tube Z1, described
Bidirectional trigger diode Q1 is in parallel with the capacitor C4；The anode of the LED control terminal DC3 and the one of bidirectional trigger diode Q2
End connection, the cathode of the LED control terminal DC3 are connect with the other end of bidirectional trigger diode Q2, two-way two pole of triggering
Pipe Q2 is in parallel with the voltage-stabiliser tube Z2, and the bidirectional trigger diode Q2 is in parallel with the capacitor C5；The LED control terminal DC4
Anode connect with one end of bidirectional trigger diode Q3, the cathode of the LED control terminal DC4 is with bidirectional trigger diode Q3's
The other end connection, the bidirectional trigger diode Q3 is in parallel with the voltage-stabiliser tube Z3, the bidirectional trigger diode Q3 with it is described
Capacitor C6 is in parallel；The anode of the LED control terminal DC5 is connect with one end of bidirectional trigger diode Q4, the LED control terminal
The cathode of DC5 is connect with the other end of bidirectional trigger diode Q4, and the bidirectional trigger diode Q4 and the voltage-stabiliser tube Z4 are simultaneously
Connection, the bidirectional trigger diode Q4 are in parallel with the capacitor C7；Anode and two-way two pole of triggering of the LED control terminal DC6
One end of pipe Q5 connects, and the cathode of the LED control terminal DC6 is connect with the other end of bidirectional trigger diode Q5, described two-way
Diac Q5 is in parallel with the voltage-stabiliser tube Z5, and the bidirectional trigger diode Q5 is in parallel with the capacitor C8；The LED control
The anode of end DC7 processed is connect with one end of bidirectional trigger diode Q6, the cathode of the LED control terminal DC7 and two-way triggering two
The other end of pole pipe Q6 connects, and the bidirectional trigger diode Q6 is in parallel with the voltage-stabiliser tube Z6, the bidirectional trigger diode
Q6 is in parallel with the capacitor C9；Capacitor C3 and electricity are parallel between the LED access control module and constant current conversion control circuit
Hold EC2.
3. a kind of LED control circuit of multiple-channel output according to claim 1, it is characterised in that: the pwm control circuit
It include that chip U2, resistance R7, resistance R8 and capacitor C13, the 1st pin of the chip U2 are connect with voltage regulator circuit, the electricity
Hinder R8 it is in parallel with capacitor C13, the 7th pin of the chip U2 is connect with one end of resistance R8, the other end of the resistance R8 and
Voltage regulator circuit connection；The 7th pin of the chip U2 is connect with one end of resistance R7, the other end of the resistance R8 and pressure stabilizing electricity
Road connection；Resistance R6 is provided between the voltage regulator circuit and resistance R7；The 5th pin of the chip U2 by resistance R13 with
The pin DIM connection of chip U1.
4. a kind of LED control circuit of multiple-channel output according to claim 3, it is characterised in that: the voltage regulator circuit packet
Triode Q7, resistance R4, voltage-stabiliser tube Z7, capacitor C10, resistance R5, voltage-stabiliser tube Z8, capacitor EC4, capacitor C12 and capacitor are included
The cathode of EC5, the diode D6 are connect with the collector of triode Q7, one end of the resistance R4 and the current collection of triode Q7
Pole connection, the other end of the resistance R4 are connect with the base stage of triode Q7, and the emitter of the triode Q7 passes through capacitor C10
It is connect with voltage-stabiliser tube Z7 with the base stage of triode Q7；One end of the resistance R5 is connect with the emitter of triode Q7, the electricity
The other end of resistance R5 is connect with the 1st pin of chip U2, and the other end of the resistance R5 is connect with the cathode of voltage-stabiliser tube Z8, described
The anode of capacitor EC5 is connect with the collector of triode Q7, and the cathode of the capacitor EC5 is connect with the anode of voltage-stabiliser tube Z8, institute
It is parallel with one another to state voltage-stabiliser tube Z8, capacitor EC4, capacitor C12.
5. a kind of LED control circuit of multiple-channel output according to claim 4, it is characterised in that: the brightness adjustment control electricity
Road includes variable potentiometer VR1, triode Q8, voltage-stabiliser tube Z9, capacitor C14, resistance R10, resistance R11 and resistance R12, described
Variable potentiometer VR1 is connect by resistance R11 with the base stage of triode Q8；The variable potentiometer VR1 passes through resistance R12 and three
The emitter of pole pipe Q8 connects, and the variable potentiometer VR1 is connect by resistance R10 with the collector of triode Q8, and described three
The collector of pole pipe Q8 is connect with the cathode of voltage-stabiliser tube Z9, and the emitter of the triode Q8 is connect with the anode of voltage-stabiliser tube Z9,
The cathode of the voltage-stabiliser tube Z9 is connect by resistance R6 with the emitter of triode Q7, the anode and voltage-stabiliser tube of the voltage-stabiliser tube Z9
The anode connection of Z8.
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| CN201710386563.2A CN107148111B (en) | 2017-05-26 | 2017-05-26 | A kind of LED control circuit of multiple-channel output |
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| CN107148111B true CN107148111B (en) | 2019-04-16 |
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| CN109104795B (en) * | 2018-09-30 | 2023-12-22 | 厦门思泰克智能科技股份有限公司 | Dimmable LED drive control circuit |
| CN112055442A (en) * | 2020-08-12 | 2020-12-08 | 东莞华明灯具有限公司 | Low-voltage dimming LED lamp system capable of adapting to power supply of arbitrary waveform voltage |
| CN112804792B (en) * | 2021-04-13 | 2021-07-13 | 深圳市安规科技有限公司 | Dimming power module and LED dimming device of steady voltage power supply |
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| CN101677482B (en) * | 2008-09-17 | 2011-03-23 | 深圳市斯派克光电科技有限公司 | Control circuit of intellectualized LED street lamp |
| CN201298947Y (en) * | 2008-12-12 | 2009-08-26 | 东莞华明灯具有限公司 | LED connection controller |
| CN101815386B (en) * | 2010-04-30 | 2013-07-17 | 海洋王照明科技股份有限公司 | LED lamp and control circuit thereof |
| CN102762011B (en) * | 2011-04-29 | 2015-03-11 | 海洋王照明科技股份有限公司 | LED (Light Emitting Diode) constant-current dimming drive circuit device |
| CN202135380U (en) * | 2011-08-05 | 2012-02-01 | 东莞华明灯具有限公司 | Track-used self-dimming LED drive power supply |
| CN202334993U (en) * | 2011-09-29 | 2012-07-11 | 东莞华明灯具有限公司 | Multi-functional LED (Light Emitting Diode) lamp drive circuit |
| CN203691708U (en) * | 2014-01-10 | 2014-07-02 | 深圳市垅运照明电器有限公司 | Multipath LED output current sampling circuit |
| CN205993006U (en) * | 2016-08-31 | 2017-03-01 | 浙江宙辉电器有限公司 | A kind of light adjusting circuit |
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