CN105873278B - A kind of multi-mode dimming power source circuit - Google Patents
A kind of multi-mode dimming power source circuit Download PDFInfo
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- CN105873278B CN105873278B CN201610341282.0A CN201610341282A CN105873278B CN 105873278 B CN105873278 B CN 105873278B CN 201610341282 A CN201610341282 A CN 201610341282A CN 105873278 B CN105873278 B CN 105873278B
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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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- 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 invention discloses a kind of multi-mode dimming power source circuit, including the input rectifying filter circuit being sequentially connected, high frequency transformation switching circuit, output rectifier and filter, constant current constant voltage output end adjusting control circuit, also include adjusting control circuit, the adjusting control circuit connects the input rectifying filter circuit and the high frequency transformation switching circuit respectively, multi-mode dimming power source circuit of the present invention both can carry out LED light modulations in input, LED light modulations can also be carried out in output end, change the monotype light-dimming method of prior art completely, greatly improve the convenience of LED light modulations.
Description
Technical field
The present invention relates to LED power technical field, and in particular to a kind of multi-mode dimming power source circuit.
Background technology
The mode for realizing LED light modulations using LED power in the market has two kinds, and a kind of entered by the signal of input
Row regulation；For example power carrier control and controllable silicon regulation, another is to receive control letter by the signaling interface of LED output ends
Number, or prior art LED power can only be adjusted in input, or can only be adjusted in output end, which limits light modulation
Flexibility, therefore urgently improve.
The content of the invention
The technical problem to be solved in the present invention is that there is provided a kind of multi-mode dimming power source in view of the shortcomings of the prior art
Circuit, overcomes prior art LED power to use or in input or the single-mode dimmed in output end, therefore limit
The defect of system light modulation flexibility.
The present invention be solve the technical scheme that is used of above-mentioned technical problem for：
A kind of multi-mode dimming power source circuit, including input rectifying filter circuit, the high frequency transformation switching electricity being sequentially connected
Road, output rectifier and filter, constant current constant voltage output end adjusting control circuit, in addition to adjusting control circuit, the light modulation control
Circuit processed connects the input rectifying filter circuit and the high frequency transformation switching circuit respectively, wherein the adjusting control circuit
Including the biasing power supply circuit and control circuit being sequentially connected, the biasing power supply circuit includes triode Q2, Zener diode
D1, resistance R7, resistance R27, resistance R26, polarized electric capacity C18, polarized electric capacity C4, diode D3 and resistance R18, Zener two
Pole pipe D1 negative pole connecting triode Q2 base stage, Zener diode D1 plus earth, polarized electric capacity C4 positive pole connection
Diode D3 negative pole, polarized electric capacity C4 negative pole ground connection, resistance R18 one end connection diode D3 positive pole, the other end
Transformer T1 primary sides non-same polarity 5 is connected, resistance R7 one end connection Zener diode D1 negative pole, the other end is connected with pole
Property electric capacity C4 positive pole, after resistance R27 and resistance R26 series connection, resistance R26 connecting triodes Q2 emitter stage, resistance R27 connections
Transformer T1 primary sides Same Name of Ends 1, polarized electric capacity C18 positive pole connecting triode Q2 emitter stage and photoelectrical coupler U2's
Terminals 4, polarized electric capacity C18 negative pole ground connection；The control circuit includes main control chip U1, resistance R4, resistance R5, resistance
R10, resistance R22, resistance R23, resistance R25, resistance R30, resistance R31, resistance R35, electric capacity C3, electric capacity C8 and electric capacity C9, electricity
Hinder after R30 and resistance R31 parallel connections, two ends connect resistance R23 and resistance R22 respectively, and resistance R22 two ends connect resistance respectively
R31 and photoelectrical coupler U2 terminals 3, resistance R30, resistance R31 and resistance R22 copolar end ground connection, resistance R23 one end
Connect the copolar end of main control chip U1 pins 4, other end connection resistance R30, resistance R31 and FET Q1 source electrodes, electric capacity
C3 one end connection main control chip U1 pins 4, other end ground connection, after resistance R10 is in parallel with electric capacity C9, one end connection resistance R25,
Other end connection main control chip U1 pins 2, resistance R25 two ends connect resistance R10 and photoelectrical coupler U2 terminals respectively
3, after resistance R11 is in parallel with electric capacity C8, one end connection main control chip U1 pins 3, other end ground connection, resistance R5 connects with resistance R4
Afterwards, resistance R5 connection transformers T1 Same Name of Ends 1, resistance R4 connection main control chip U1 pins 3, resistance R35 two ends connect respectively
Transformer T1 primary sides non-same polarity 5 and main control chip U1 pins 5 are connect, main control chip U1 pins 6 are grounded, main control chip U1 pins
7 connection resistance R34s.
Embodiments in accordance with the present invention, the constant current constant voltage output end adjusting control circuit includes operational amplifier U3A, fortune
Calculate amplifier U3B, operational amplifier U3C, operational amplifier U3D, Zener diode U4, Zener diode ZD1, Zener diode
D11, diode D2, diode D9, resistance R5, resistance R6, resistance R8, resistance R13, resistance R15, resistance R17, resistance R20, electricity
Hinder R28, resistance R29, resistance R36, resistance R39, resistance R41, resistance R42, resistance R43, resistance R44, resistance R45, resistance
R46, resistance R47, resistance R51, resistance R52, resistance R54, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14,
Electric capacity C15；
After electric capacity C13 is in parallel with Zener diode U4, Zener diode U4 negative pole connection resistance R15 one end and resistance
R52 one end and operational amplifier U3C in-phase input end, Zener diode U4 plus earth, the resistance R52 other end
Concatenation operation amplifier U3D positive voltage input, resistance R15 other end concatenation operation amplifier U3D's is same mutually defeated
Enter end, operational amplifier U3D negative supply voltage input end grounding, resistance R20 and resistance R17 series connection after, resistance R20 connections transport
Amplifier U3D inverting input is calculated, resistance R17 connection Zener diodes ZD1 negative pole, Zener diode ZD1 positive pole connects
Ground, operational amplifier U3D output end connection resistance R20 and resistance R17 copolar end, resistance R13 one end concatenation operation is put
Big device U3D inverting input, resistance R13 other end ground connection, electric capacity C10 one end concatenation operation amplifier U3D positive electricity
Source voltage input end, electric capacity C10 other end ground connection, resistance R29 one end concatenation operation amplifier U3D in-phase input end,
After resistance R29 other end connection Zener diode ZD1 negative pole, resistance R39 and resistance R46 series connection, resistance R39 connection Zeners
Diode D11 negative pole and operational amplifier U3A in-phase input end, resistance R46 connection Zener diodes ZD1 negative pole, together
Receive diode D11 plus earth, resistance R28 one end connection resistance R39 and resistance R46 copolar end, resistance R28's is another
End connection lead-out terminal 4, electric capacity C15 one end concatenation operation amplifier U3A in-phase input end, electric capacity C15 another termination
Ground, operational amplifier U3A inverting input is connected with operational amplifier U3A output end, resistance R8 one end concatenation operation
Amplifier U3A inverting input, resistance R8 other end concatenation operation amplifier U3B in-phase input end, resistance R41 and electricity
Hinder after R42 series connection, one end ground connection, other end concatenation operation amplifier U3B in-phase input end, electric capacity C10 connects with resistance R43
Afterwards, electric capacity C10 concatenation operations amplifier U3B output end, resistance R43 concatenation operation amplifiers U3B inverting input, electric capacity
After C14 is in parallel with resistance R51, one end concatenation operation amplifier U3B inverting input, other end ground connection, diode D2's is negative
Pole concatenation operation amplifier U3B output end, diode D2 positive pole connection photoelectrical coupler terminals 2, diode D9 is just
Pole connection diode D2 positive pole, diode D9 negative pole concatenation operation amplifier U3C output end, resistance R44 and electric capacity C11
After series connection, resistance R44 concatenation operation amplifiers U3C output end, electric capacity C11 concatenation operation amplifiers U3C inverting input,
After resistance R36 connects with resistance R47 and resistance R45, resistance R36 connection transformers LF3 the first terminals, resistance R45 connects
Ground, resistance R47 and resistance R45 copolar end concatenation operation amplifier U3C inverting input.
Embodiments in accordance with the present invention, the high frequency transformation switching circuit include transformer T1, triode Q1, resistance R9,
Resistance R21, resistance R24, resistance R37, resistance R38, polarized electric capacity C6, electric capacity C17, polarized electric capacity C61, diode D4,
Zener diode D5, diode D10；
After resistance R37 and resistance R38 and electric capacity C17 is in parallel, one end connection transformer T1 primary sides Same Name of Ends 1 is another
End connection diode D10 negative pole, resistance R21 two ends connect D10 positive pole and transformer T1 primary side non-same polarities respectively
3, resistance R24 two ends connect photoelectrical coupler U2 terminals 1 and triode Q1 emitter stage respectively, polarized electric capacity C6's
Positive pole connecting triode Q1 emitter stage, polarized electric capacity C6 negative pole ground connection, Zener diode D5 negative pole connecting triode
Q1 base stage, Zener diode D5 plus earth, resistance R9 two ends difference connecting triode Q1 base stage and colelctor electrode have
Polar capacitor C61 positive pole connecting triode Q1 colelctor electrode, polarized electric capacity C61 negative pole ground connection, diode D4 negative pole
Connecting triode Q1 colelctor electrode, diode D4 positive pole connection transformer T1 secondary sides non-same polarity 6.
Embodiments in accordance with the present invention, the input rectifying filter circuit includes rectifier bridge DB1, fuse F1, pressure-sensitive electricity
Hinder VDR1, transformer LF1, transformer LF2, resistance R12, resistance R14, resistance R16, resistance R19, inductance L1, inductance L2, electric capacity
C1, electric capacity C2；
Fuse F1 one end connection ac input end, other end connection transformer LF1 the first terminals, piezo-resistance
VDR1 two ends connect transformer LF1 the first terminals and the second terminals, one end after resistance R16 is in parallel with inductance L1 respectively
Connect resistance R19 one end, other end connection transformer LF2 the first terminals, resistance R19 other end connection transformer
LF1 the 3rd terminals, one end is connected resistance R14 one end, other end connection transformer after resistance R12 is in parallel with inductance L1
LF2 the second terminals, resistance R14 other end connection transformer LF1 the 4th terminals, electric capacity C1 two ends are connected respectively
Transformer LF2 the first terminals and the second terminals, after resistance R2 connects with resistance R3, resistance R2 connection transformers LF2's
First terminals, resistance R3 connection transformers LF2 the second terminals, the rectifier bridge DB1 connection transformer of terminals 3 LF2's
3rd terminals, the rectifier bridge DB1 connection transformer of terminals 1 LF2 the 4th terminals, rectifier bridge DB1 terminals 4 connect
Ground, the rectifier bridge DB1 connection transformer T1 primary sides of terminals 2 Same Name of Ends 1, electric capacity C2 one end connection transformer T1 primary sides
Same Name of Ends 1, other end ground connection.
Embodiments in accordance with the present invention, the output rectifier and filter includes transformer LF3, diode D6, diode
D7, polarized electric capacity C7, polarized electric capacity C16, resistance R6, resistance R48, resistance R49, resistance R53, resistance R54；
After resistance R6 is in parallel with resistance R54, one end connection transformer LF3 the second terminals, other end ground connection, resistance
R53 one end connection transformer LF3 the second terminals, the other end is connected with polar capacitor C16 positive pole, polarized electric capacity
C16 negative pole ground connection, polarized electric capacity C7 positive pole is connected with polar capacitor C16 positive pole, and polarized electric capacity C7 negative pole connects
Transformer LF3 the second terminals are connect, after resistance R48 connects with resistance R49, resistance R49 connection transformers LF3 the first wiring
End, resistance R48 connection transformer T1 secondary sides non-same polarity 9, after diode D6 and diode D7 are in parallel in the same direction, positive pole connects change
Depressor T1 secondary sides non-same polarity 9, negative pole connection transformer LF3 the second terminals, transformer LF3 the 3rd terminals connection
Lead-out terminal 1, transformer LF3 the 4th terminals connect lead-out terminal 2.
Implement technical scheme, have the advantages that：Multi-mode dimming power source circuit of the present invention both can be with
LED light modulations are carried out in input, LED light modulations can also be carried out in output end, change the monotype light modulation side of prior art completely
Method, greatly improves the convenience of LED light modulations.
Brief description of the drawings
The present invention is specifically described below with reference to accompanying drawing and with reference to example, advantages of the present invention and implementation will
More obvious, wherein content is only used for explanation of the present invention shown in accompanying drawing, without constituting to the present invention in all senses
On limitation, in the accompanying drawings：
Fig. 1 is multi-mode dimming power source circuit module figure of the present invention；
Fig. 2 is multi-mode dimming power source circuit diagram of the present invention.
Embodiment
As depicted in figs. 1 and 2, multi-mode dimming power source circuit of the present invention includes the input rectifying filtered electrical being sequentially connected
Road, high frequency transformation switching circuit, output rectifier and filter, constant current constant voltage output end adjusting control circuit, in addition to light modulation control
Circuit processed, adjusting control circuit connects input rectifying filter circuit and high frequency transformation switching circuit, wherein brightness adjustment control electricity respectively
Road includes the biasing power supply circuit that is sequentially connected and control circuit, biasing power supply circuit include triode Q2, Zener diode D1,
Resistance R7, resistance R27, resistance R26, polarized electric capacity C18, polarized electric capacity C4, diode D3 and resistance R18, the pole of Zener two
Pipe D1 negative pole connecting triode Q2 base stage, Zener diode D1 plus earth, polarized electric capacity C4 positive pole connection two
Pole pipe D3 negative pole, polarized electric capacity C4 negative pole ground connection, resistance R18 one end connection diode D3 positive pole, the other end connects
Connect transformer T1 primary sides non-same polarity 5, resistance R7 one end connection Zener diode D1 negative pole, other end connection polarized
After electric capacity C4 positive pole, resistance R27 and resistance R26 series connection, resistance R26 connecting triodes Q2 emitter stage, resistance R27 connections become
Depressor T1 primary sides Same Name of Ends 1, polarized electric capacity C18 positive pole connecting triode Q2 emitter stage and connecing for photoelectrical coupler U2
Line end 4, polarized electric capacity C18 negative pole ground connection；Circuit is controlled to include main control chip U1, resistance R4, resistance R5, resistance R10, electricity
Hinder R22, resistance R23, resistance R25, resistance R30, resistance R31, resistance R35, electric capacity C3, electric capacity C8 and electric capacity C9, resistance R30 and
After resistance R31 is in parallel, two ends connect resistance R23 and resistance R22 respectively, and resistance R22 two ends connect resistance R31 and photoelectricity respectively
Coupler U2 terminals 3, resistance R30, resistance R31 and resistance R22 copolar end ground connection, resistance R23 one end connection master control
The copolar end of chip U1 pins 4, other end connection resistance R30, resistance R31 and FET Q1 source electrodes, electric capacity C3 one end
Main control chip U1 pins 4 are connected, the other end is grounded, after resistance R10 is in parallel with electric capacity C9, one end connection resistance R25, the other end connects
Main control chip U1 pins 2 are connect, resistance R25 two ends connect resistance R10 and photoelectrical coupler U2 terminals 3, resistance R11 respectively
After in parallel with electric capacity C8, one end connection main control chip U1 pins 3, other end ground connection, after resistance R5 connects with resistance R4, resistance R5
Connection transformer T1 Same Name of Ends 1, resistance R4 connection main control chip U1 pins 3, resistance R35 two ends connect transformer T1 respectively
Primary side non-same polarity 5 and main control chip U1 pins 5, main control chip U1 pins 6 are grounded, the connection resistance of main control chip U1 pins 7
R34.Constant current constant voltage output end adjusting control circuit include operational amplifier U3A, operational amplifier U3B, operational amplifier U3C,
Operational amplifier U3D, Zener diode U4, Zener diode ZD1, Zener diode D11, diode D2, diode D9, resistance
R5, resistance R6, resistance R8, resistance R13, resistance R15, resistance R17, resistance R20, resistance R28, resistance R29, resistance R36, resistance
R39, resistance R41, resistance R42, resistance R43, resistance R44, resistance R45, resistance R46, resistance R47, resistance R51, resistance R52,
Resistance R54, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, electric capacity C15；Electric capacity C13 and Zener diode U4
After parallel connection, Zener diode U4 negative pole connection resistance R15 one end and resistance R52 one end and operational amplifier U3C's
In-phase input end, Zener diode U4 plus earth, resistance R52 other end concatenation operation amplifier U3D positive supply electricity
Press input, resistance R15 other end concatenation operation amplifier U3D in-phase input end, operational amplifier U3D negative supply electricity
After pressure input end grounding, resistance R20 and resistance R17 series connection, resistance R20 concatenation operation amplifiers U3D inverting input, resistance
R17 connection Zener diodes ZD1 negative pole, Zener diode ZD1 plus earth, operational amplifier U3D output end connection
Resistance R20 and resistance R17 copolar end, resistance R13 one end concatenation operation amplifier U3D inverting input, resistance R13's
The other end is grounded, electric capacity C10 one end concatenation operation amplifier U3D positive voltage input, electric capacity C10 another termination
Ground, resistance R29 one end concatenation operation amplifier U3D in-phase input end, resistance R29 other end connection Zener diode
After ZD1 negative pole, resistance R39 and resistance R46 series connection, resistance R39 connection Zener diodes D11 negative pole and operational amplifier
U3A in-phase input end, resistance R46 connection Zener diodes ZD1 negative pole, Zener diode D11 plus earth, resistance
R28 one end connection resistance R39 and resistance R46 copolar end, resistance R28 other end connection lead-out terminal 4, electric capacity C15's
One end concatenation operation amplifier U3A in-phase input end, electric capacity C15 other end ground connection, operational amplifier U3A anti-phase input
End is connected with operational amplifier U3A output end, resistance R8 one end concatenation operation amplifier U3A inverting input, resistance
After R8 other end concatenation operation amplifier U3B in-phase input end, resistance R41 and resistance R42 series connection, one end ground connection is another
Hold concatenation operation amplifier U3B in-phase input end, after electric capacity C10 connects with resistance R43, electric capacity C10 concatenation operation amplifiers
U3B output end, resistance R43 concatenation operation amplifiers U3B inverting input, after electric capacity C14 is in parallel with resistance R51, one end
Concatenation operation amplifier U3B inverting input, other end ground connection, diode D2 negative pole concatenation operation amplifier U3B's is defeated
Go out end, diode D2 positive pole connection photoelectrical coupler terminals 2, diode D9 cathode connecting diode D2 positive pole, two
Pole pipe D9 negative pole concatenation operation amplifier U3C output end, after resistance R44 connects with electric capacity C11, resistance R44 concatenation operations
Amplifier U3C output end, electric capacity C11 concatenation operation amplifiers U3C inverting input, resistance R36 and resistance R47 and electricity
Hinder after R45 series connection, resistance R36 connection transformers LF3 the first terminals, resistance R45 ground connection, resistance R47 is total to resistance R45's
Extreme concatenation operation amplifier U3C inverting input.High frequency transformation switching circuit includes transformer T1, triode Q1, resistance
R9, resistance R21, resistance R24, resistance R37, resistance R38, polarized electric capacity C6, electric capacity C17, polarized electric capacity C61, diode
D4, Zener diode D5, diode D10；After resistance R37 and resistance R38 and electric capacity C17 is in parallel, one end connection transformer T1
Primary side Same Name of Ends 1, other end connection diode D10 negative pole, resistance R21 two ends connect D10 positive pole and transformation respectively
Device T1 primary sides non-same polarity 3, resistance R24 two ends connect photoelectrical coupler U2 terminals 1 and triode Q1 hair respectively
Emitter-base bandgap grading, polarized electric capacity C6 positive pole connecting triode Q1 emitter stage, polarized electric capacity C6 negative pole ground connection, Zener diode
D5 negative pole connecting triode Q1 base stage, Zener diode D5 plus earth, resistance R9 two ends difference connecting triode
Q1 base stage and colelctor electrode, polarized electric capacity C61 positive pole connecting triode Q1 colelctor electrode, polarized electric capacity C61 negative pole
Ground connection, diode D4 negative pole connecting triode Q1 colelctor electrode, diode D4 positive pole connection transformer T1 secondary sides are non-same
Name end 6.Embodiments in accordance with the present invention, input rectifying filter circuit include rectifier bridge DB1, fuse F1, piezo-resistance VDR1,
Transformer LF1, transformer LF2, resistance R12, resistance R14, resistance R16, resistance R19, inductance L1, inductance L2, electric capacity C1, electric capacity
C2；Fuse F1 one end connection ac input end, other end connection transformer LF1 the first terminals, piezo-resistance VDR1
Two ends connect transformer LF1 the first terminals and the second terminals respectively, one end is connected after resistance R16 is in parallel with inductance L1
Resistance R19 one end, other end connection transformer LF2 the first terminals, resistance R19 other end connection transformer LF1's
3rd terminals, one end be connected resistance R14 one end after resistance R12 and inductance L1 are in parallel, and the other end connects the of transformer LF2
Two terminals, resistance R14 other end connection transformer LF1 the 4th terminals, electric capacity C1 two ends connect transformer respectively
LF2 the first terminals and the second terminals, after resistance R2 connects with resistance R3, the first of resistance R2 connection transformers LF2 connects
Line end, resistance R3 connection transformers LF2 the second terminals, the 3rd of the rectifier bridge DB1 connection transformer of terminals 3 LF2 connects
Line end, the rectifier bridge DB1 connection transformer of terminals 1 LF2 the 4th terminals, rectifier bridge DB1 terminals 4 are grounded, rectification
The bridge DB1 connection transformer T1 primary sides of terminals 2 Same Name of Ends 1, electric capacity C2 one end connection transformer T1 primary side Same Name of Ends
1, other end ground connection.Output rectifier and filter includes transformer LF3, diode D6, diode D7, polarized electric capacity C7, had
Polar capacitor C16, resistance R6, resistance R48, resistance R49, resistance R53, resistance R54；After resistance R6 is in parallel with resistance R54, one end
Transformer LF3 the second terminals are connected, other end ground connection, resistance R53 one end connects transformer LF3 the second terminals,
The other end is connected with polar capacitor C16 positive pole, polarized electric capacity C16 negative pole ground connection, polarized electric capacity C7 positive pole connection
Polarized electric capacity C16 positive pole, polarized electric capacity C7 negative pole connection transformer LF3 the second terminals, resistance R48 and resistance
After R49 series connection, resistance R49 connection transformers LF3 the first terminals, resistance R48 connection transformer T1 secondary side non-same polarities
After 9, diode D6 and diode D7 are in parallel in the same direction, positive pole connection transformer T1 secondary sides non-same polarity 9, negative pole connects transformer
LF3 the second terminals, transformer LF3 the 3rd terminals connection lead-out terminal 1, transformer LF3 the 4th terminals, connection
Lead-out terminal 2.
Input rectifying filter circuit includes F1, VDR1, LF1, R19, R14, L1, L2, R16, R12, C1, LF2, DB1, C2,
Wherein R19, R14 are damping resistances, it is to avoid inductance is produced with filter capacitor to be flashed caused by concussion.R19 and R14 can not be too simultaneously
It is big or too small, it should be gone to select corresponding resistance according to the wattage size of dimming power source, C1 value, which is tried one's best, makes capacity minimum,
But can play a part of eliminating electromagnetism Interference again, C1 capacity is best within 47NF if compromise is chosen.High frequency
Transformation switching circuit is mainly made up of high frequency transformer T1, switch triode Q1, R37, R38, C17, D10, R21 composition leakage inductance point
Peak absorption circuit, can be transformer T1 demagnetizations, absorb leakage inductance spike, protect triode Q1 not breakdown.R27、R26、C18、
Q2, D1, R7, C4, D3, R18 constitute biasing power supply circuit, while also playing the effect of fictitious load.R7, D1, Q2 constitute series connection
Mu balanced circuit, when light modulation arrives most dark, circuit load is very light, while the LED voltage for exporting lamp string is relatively low, the electricity of auxiliary power supply
Press and be directly proportional with the voltage of lamp string, in order to it is relatively low when have enough supply voltages, so auxiliary power supply voltage is complete
It is very high when bright, exceed the supply voltage that main control chip U1 can be born, it is necessary to which this serial regulating circuit is depressured to
Normal operating voltage, while it can play a part of fictitious load when brightness is transferred to most dark to meet the need of maintenance electric current
Ask.The brightness adjustment control course of work is mainly realized by the capacitance-resistance loop of main control chip U1 and its surrounding.Main control chip U1 can be selected
With the current-control type PFC IC of critical conduction mode, such as FAN7527 of ST L6562, FARICHILD companies etc., light modulator
Signal one voltage amplitude signal corresponding with its cut amplitude is obtained by input rectifying loop, by R27, R26,
R11, C8 divider filter enter main control chip U1 pins 3, then are determined by the multiplier inside main control chip U1 and comparator
The amplitude of the peak point current of U1 pins 4, so as to determine the load capacity of circuit, goes to change LED by dimmer signal change
Current output load electric current, so as to realize that size of current is adjustable, i.e. the Dimmable of LED load.Output rectifier and filter master
To be made up of D6, D7, C16, C7, LF3, R48 and R49 are that diode carries out peak absorbing.Current constant control by U3B, U3A, U3C,
U3D, U4 and its peripheral capacitance resistance component are constituted, and U3B, U3A, U3C, U3D can select the operational amplifier of 4 passages, general choosing
With LM324, the preferable comparator of temperature coefficient can also be selected.Wherein U3C, R36, R47, R45, R44, C11, D9 constitute perseverance
Voltage-controlled circuit processed, R36, R47, R45 determine output voltage size, and the reference voltage of U3C normal phase input end is 2.5V, and it is
Come from U4（Model is TL431）, it constitute 2.5V reference voltage stabilizing source, current constant control by U3B, U3A, R6, R54, R51,
C14, R41, R42, R8 are constituted, and R6 and R54 are current regulating resistances, and R41 and R42 also have R8 to be reference voltage setting resistance.Can
Become resistance brightness adjustment control main by U3D, ZD1, U3A, U3B is completed, and three kinds of signals that lead-out terminal 4 is accessed can be arrived by amplifier
Up to optocoupler U2, regulate and control main control chip U1, dimmed, ZD1 and D1 here must select 10V voltage-stabiliser tube, if output
When the input signal of terminal 4 is 0-10V and variable resistor signal, because ZD1 cathode voltage is clamped to 10V, 0-10V
Signal can be added to U3A normal phase input end there is provided reference voltage by R28, R39, if during variable resistor, ZD1 electricity
Pressure carries out partial pressure by R46, R28 with external variable resistor, and U3A normal phase input end is sent to by R39, is carried to electric current regulation
For benchmark, so as to realize reliable light modulation.If the input signal of lead-out terminal 4 is PWM square waves, R39 and C15 constitute RC products
Divide device, a DC voltage being directly proportional with pulse width will be obtained on C15, while vising most limited also by D11
High 10V voltages, this voltage will turn into the reference voltage that electric current is adjusted, so as to realize the change of electric current.
Those skilled in the art do not depart from the essence and spirit of the present invention, can have various deformation scheme to realize the present invention,
Preferable feasible embodiment of the invention is the foregoing is only, not thereby limits to the interest field of the present invention, it is all with this
Within the equivalent structure change that description of the invention and accompanying drawing content are made, the interest field for being both contained in the present invention.
Claims (5)
1. a kind of multi-mode dimming power source circuit, it is characterised in that input rectifying filter circuit, high frequency including being sequentially connected become
Press switching circuit, output rectifier and filter, constant current constant voltage output end adjusting control circuit, in addition to adjusting control circuit, institute
State adjusting control circuit and connect the input rectifying filter circuit and the high frequency transformation switching circuit respectively, wherein the light modulation
Control circuit includes the biasing power supply circuit that is sequentially connected and control circuit, and the biasing power supply circuit includes triode Q2, neat
Receive diode D1, resistance R7, resistance R27, resistance R26, polarized electric capacity C18, polarized electric capacity C4, diode D3 and resistance
R18, Zener diode D1 negative pole connecting triode Q2 base stage, Zener diode D1 plus earth, polarized electric capacity C4
Cathode connecting diode D3 negative pole, polarized electric capacity C4 negative pole ground connection, resistance R18 one end connection diode D3 is just
Pole, other end connection transformer T1 primary sides non-same polarity 5, resistance R7 one end connection Zener diode D1 negative pole is another
End is connected with polar capacitor C4 positive pole, after resistance R27 and resistance R26 connect, resistance R26 connecting triodes Q2 emitter stage,
Resistance R27 connection transformer T1 primary sides Same Name of Ends 1, polarized electric capacity C18 positive pole connecting triode Q2 emitter stage and light
Electric coupler U2 terminals 4, polarized electric capacity C18 negative pole ground connection；The control circuit includes main control chip U1, resistance
R4, resistance R5, resistance R10, resistance R22, resistance R23, resistance R25, resistance R30, resistance R31, resistance R35, electric capacity C3, electric capacity
After C8 and electric capacity C9, resistance R30 and resistance R31 are in parallel, two ends connect resistance R23 and resistance R22, resistance R22 two ends respectively
Resistance R31 and photoelectrical coupler U2 terminals 3 are connected respectively, and resistance R30, resistance R31 and resistance R22 copolar end are grounded,
Resistance R23 one end connection main control chip U1 pins 4, other end connection resistance R30, resistance R31 and FET Q1 source electrodes
Copolar end, electric capacity C3 one end connection main control chip U1 pins 4, other end ground connection, after resistance R10 is in parallel with electric capacity C9, one
End connection resistance R25, the other end connection main control chip U1 pin 2, resistance R25 two ends connect resistance R10 and photoelectricity coupling respectively
Clutch U2 terminals 3, after resistance R11 is in parallel with electric capacity C8, one end connection main control chip U1 pins 3, other end ground connection, resistance
After R5 connects with resistance R4, resistance R5 connection transformers T1 Same Name of Ends 1, resistance R4 connection main control chip U1 pins 3, resistance
R35 two ends connect transformer T1 primary sides non-same polarity 5 and main control chip U1 pins 5 respectively, and main control chip U1 pins 6 connect
Ground, the connection resistance R34 of main control chip U1 pins 7.
2. multi-mode dimming power source circuit according to claim 1, it is characterised in that：The constant current constant voltage output end light modulation
Circuit is controlled to include operational amplifier U3A, operational amplifier U3B, operational amplifier U3C, operational amplifier U3D, the pole of Zener two
Pipe U4, Zener diode ZD1, Zener diode D11, diode D2, diode D9, resistance R5, resistance R6, resistance R8, resistance
R13, resistance R15, resistance R17, resistance R20, resistance R28, resistance R29, resistance R36, resistance R39, resistance R41, resistance R42,
Resistance R43, resistance R44, resistance R45, resistance R46, resistance R47, resistance R51, resistance R52, resistance R54, electric capacity C10, electric capacity
C11, electric capacity C12, electric capacity C13, electric capacity C14, electric capacity C15；
After electric capacity C13 is in parallel with Zener diode U4, Zener diode U4 negative pole connection resistance R15 one end and resistance R52
One end and operational amplifier U3C in-phase input end, Zener diode U4 plus earth, the resistance R52 other end connects
Connect operational amplifier U3D positive voltage input, resistance R15 other end concatenation operation amplifier U3D homophase input
After end, operational amplifier U3D negative supply voltage input end grounding, resistance R20 and resistance R17 series connection, resistance R20 concatenation operations
Amplifier U3D inverting input, resistance R17 connection Zener diodes ZD1 negative pole, Zener diode ZD1 plus earth,
Operational amplifier U3D output end connection resistance R20 and resistance R17 copolar end, resistance R13 one end concatenation operation amplifier
U3D inverting input, resistance R13 other end ground connection, electric capacity C10 one end concatenation operation amplifier U3D positive supply electricity
Press input, electric capacity C10 other end ground connection, resistance R29 one end concatenation operation amplifier U3D in-phase input end, resistance
After R29 other end connection Zener diode ZD1 negative pole, resistance R39 and resistance R46 series connection, the pole of resistance R39 connections Zener two
Pipe D11 negative pole and operational amplifier U3A in-phase input end, resistance R46 connection Zener diodes ZD1 negative pole, Zener two
Pole pipe D11 plus earth, resistance R28 one end connection resistance R39 and resistance R46 copolar end, the resistance R28 other end connects
Connect lead-out terminal 4, electric capacity C15 one end concatenation operation amplifier U3A in-phase input end, electric capacity C15 other end ground connection, fortune
The inverting input for calculating amplifier U3A is connected with operational amplifier U3A output end, resistance R8 one end concatenation operation amplifier
U3A inverting input, resistance R8 other end concatenation operation amplifier U3B in-phase input end, resistance R41 and resistance R42
After series connection, one end ground connection, other end concatenation operation amplifier U3B in-phase input end, after electric capacity C10 connects with resistance R43, electricity
Hold C10 concatenation operation amplifiers U3B output end, resistance R43 concatenation operation amplifiers U3B inverting input, electric capacity C14 with
After resistance R51 is in parallel, one end concatenation operation amplifier U3B inverting input, other end ground connection, diode D2 negative pole connection
Operational amplifier U3B output end, diode D2 positive pole connection photoelectrical coupler terminals 2, diode D9 positive pole connection
Diode D2 positive pole, diode D9 negative pole concatenation operation amplifier U3C output end, resistance R44 connects with electric capacity C11
Afterwards, resistance R44 concatenation operations amplifier U3C output end, electric capacity C11 concatenation operation amplifiers U3C inverting input, resistance
After R36 connects with resistance R47 and resistance R45, resistance R36 connection transformers LF3 the first terminals, resistance R45 ground connection, electricity
Hinder R47 and resistance R45 copolar end concatenation operation amplifier U3C inverting input.
3. multi-mode dimming power source circuit according to claim 2, it is characterised in that：The high frequency transformation switching circuit bag
Include transformer T1, triode Q1, resistance R9, resistance R21, resistance R24, resistance R37, resistance R38, polarized electric capacity C6, electric capacity
C17, polarized electric capacity C61, diode D4, Zener diode D5, diode D10；
After resistance R37 and resistance R38 and electric capacity C17 is in parallel, one end connection transformer T1 primary sides Same Name of Ends 1, the other end connects
Diode D10 negative pole is connect, resistance R21 two ends connect D10 positive pole and transformer T1 primary sides non-same polarity 3 respectively, electricity
Resistance R24 two ends connect photoelectrical coupler U2 terminals 1 and triode Q1 emitter stage, polarized electric capacity C6 positive pole respectively
Connecting triode Q1 emitter stage, polarized electric capacity C6 negative pole ground connection, Zener diode D5 negative pole connecting triode Q1's
Base stage, Zener diode D5 plus earth, resistance R9 two ends difference connecting triode Q1 base stage and colelctor electrode, polarized
Electric capacity C61 positive pole connecting triode Q1 colelctor electrode, polarized electric capacity C61 negative pole ground connection, diode D4 negative pole connection
Triode Q1 colelctor electrode, diode D4 positive pole connection transformer T1 secondary sides non-same polarity 6.
4. multi-mode dimming power source circuit according to claim 3, it is characterised in that：The input rectifying filter circuit bag
Include rectifier bridge DB1, fuse F1, piezo-resistance VDR1, transformer LF1, transformer LF2, resistance R12, resistance R14, resistance
R16, resistance R19, inductance L1, inductance L2, electric capacity C1, electric capacity C2；
Fuse F1 one end connection ac input end, other end connection transformer LF1 the first terminals, piezo-resistance VDR1
Two ends connect transformer LF1 the first terminals and the second terminals respectively, one end is connected after resistance R16 is in parallel with inductance L1
Resistance R19 one end, other end connection transformer LF2 the first terminals, resistance R19 other end connection transformer LF1's
3rd terminals, one end be connected resistance R14 one end after resistance R12 and inductance L1 are in parallel, and the other end connects the of transformer LF2
Two terminals, resistance R14 other end connection transformer LF1 the 4th terminals, electric capacity C1 two ends connect transformer respectively
LF2 the first terminals and the second terminals, after resistance R2 connects with resistance R3, the first of resistance R2 connection transformers LF2 connects
Line end, resistance R3 connection transformers LF2 the second terminals, the 3rd of the rectifier bridge DB1 connection transformer of terminals 3 LF2 connects
Line end, the rectifier bridge DB1 connection transformer of terminals 1 LF2 the 4th terminals, rectifier bridge DB1 terminals 4 are grounded, rectification
The bridge DB1 connection transformer T1 primary sides of terminals 2 Same Name of Ends 1, electric capacity C2 one end connection transformer T1 primary side Same Name of Ends
1, other end ground connection.
5. multi-mode dimming power source circuit according to claim 4, it is characterised in that：The output rectifier and filter bag
Include transformer LF3, diode D6, diode D7, polarized electric capacity C7, polarized electric capacity C16, resistance R6, resistance R48, resistance
R49, resistance R53, resistance R54；
After resistance R6 is in parallel with resistance R54, one end connection transformer LF3 the second terminals, other end ground connection, resistance R53's
One end connection transformer LF3 the second terminals, the other end is connected with polar capacitor C16 positive pole, and polarized electric capacity C16's is negative
Pole is grounded, and polarized electric capacity C7 positive pole is connected with polar capacitor C16 positive pole, polarized electric capacity C7 negative pole connection transformer
LF3 the second terminals, after resistance R48 connects with resistance R49, resistance R49 connection transformers LF3 the first terminals, resistance
R48 connection transformer T1 secondary sides non-same polarity 9, after diode D6 and diode D7 are in parallel in the same direction, positive pole connects transformer T1
Secondary side non-same polarity 9, negative pole connection transformer LF3 the second terminals, transformer LF3 the 3rd terminals connection output end
Son 1, transformer LF3 the 4th terminals connect lead-out terminal 2.
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| CN201610341282.0A CN105873278B (en) | 2016-05-23 | 2016-05-23 | A kind of multi-mode dimming power source circuit |
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| CN106793289B (en) * | 2016-12-16 | 2019-03-29 | 珠海市诚立信电子科技有限公司 | A kind of running lamp line control circuit |
| CN109617201B (en) * | 2018-12-29 | 2020-07-07 | 厦门市科力电子有限公司 | Novel battery charger circuit |
| CN110572899A (en) * | 2019-08-21 | 2019-12-13 | 东莞华明灯具有限公司 | Light modulation circuit |
| CN116068699B (en) * | 2023-03-07 | 2023-08-29 | 南京迪威普光电技术股份有限公司 | Annular high-voltage arc generator with controllable strength and generation method |
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| CN101711069B (en) * | 2009-07-21 | 2013-01-16 | 海洋王照明科技股份有限公司 | LED driving power supply circuit |
| WO2012155801A1 (en) * | 2011-05-17 | 2012-11-22 | 广州南科集成电子有限公司 | Led lamp control circuit |
| CN102752932B (en) * | 2012-07-04 | 2014-10-29 | 宁波高新区赛尔富电子有限公司 | LED (light-emitting diode) dimming circuit |
| WO2015038026A1 (en) * | 2013-09-16 | 2015-03-19 | Zakrytoye Aktsionernoye Obshchestvo "Kb "Sveta-Led" | Led light |
| CN104968070B (en) * | 2015-03-18 | 2017-07-28 | 盐城工学院 | A kind of LED drive circuit |
| CN205657889U (en) * | 2016-05-23 | 2016-10-19 | 东莞市领冠半导体照明有限公司 | Multi -mode power supply circuit that adjusts luminance |
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Address after: 523000 Daliantang Industrial Zone No. 3, Daliantang Community, Wanjiang District, Dongguan City, Guangdong Province Patentee after: Guangdong Collar Crown Intelligent Technology Co., Ltd. Address before: 523000 Daliantang Industrial Zone No. 3, Daliantang Community, Wanjiang District, Dongguan City, Guangdong Province Patentee before: Linkun (Dongguan) Semiconductor Lighting Co., Ltd. |
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