CN205657889U - Multi -mode power supply circuit that adjusts luminance - Google Patents
Multi -mode power supply circuit that adjusts luminance Download PDFInfo
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- CN205657889U CN205657889U CN201620469027.XU CN201620469027U CN205657889U CN 205657889 U CN205657889 U CN 205657889U CN 201620469027 U CN201620469027 U CN 201620469027U CN 205657889 U CN205657889 U CN 205657889U
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Abstract
The utility model discloses a multi -mode power supply circuit that adjusts luminance, including consecutive input rectification filter circuit, high frequency variable pressure switching circuit, output Rectifier filter circuit, constant current constant voltage output light modulation control circuit, still include light modulation control circuit, light modulation control circuit connects respectively input rectification filter circuit with the high frequency variable pressure switching circuit, the utility model discloses multi -mode power supply circuit that adjusts luminance both can carry out LED at the input and adjust luminance, also can carry out LED at the output and adjust luminance, changes prior art's the monotype method of adjusting luminance completely, has greatly improved the convenience that LED adjusted luminance.
Description
Technical field
This utility model relates to LED power technical field, is specifically related to a kind of multi-mode dimming power source circuit.
Background technology
The mode using LED power to realize LED light modulation in the market has two kinds, and a kind of is that the signal by input is adjusted；Such as power carrier controls and controllable silicon regulates, another kind is to accept control signal by the signaling interface of LED outfan, prior art LED power or can only regulate at input, or can only regulate at outfan, which limits the motility of light modulation, the most urgently improve.
Utility model content
The technical problems to be solved in the utility model is, for the deficiencies in the prior art, a kind of multi-mode dimming power source circuit is provided, overcomes prior art LED power to use or at input or carry out the single-mode dimmed at outfan, therefore limit the defect of light modulation motility.
The technical scheme that this utility model is used by the above-mentioned technical problem of solution is:
nullA 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 outfan adjusting control circuit，Also include adjusting control circuit，Described adjusting control circuit connects described input rectifying filter circuit and described high frequency transformation switching circuit respectively，Wherein said adjusting control circuit includes biasing power supply circuits and the control circuit being sequentially connected，Described biasing power supply circuits include audion Q2、Zener diode D1、Resistance R7、Resistance R27、Resistance R26、Polarized electric capacity C18、Polarized electric capacity C4、Diode D3 and resistance R18，The base stage of the negative pole connecting triode Q2 of Zener diode D1，The plus earth of Zener diode D1，The negative pole of the cathode connecting diode D3 of polarized electric capacity C4，The minus earth of polarized electric capacity C4，One end of resistance R18 connects the positive pole of diode D3，Other end connection transformer T1 primary side non-same polarity 5，One end of resistance R7 connects the negative pole of Zener diode D1，The other end connects the positive pole of polarized electric capacity C4，After resistance R27 and resistance R26 series connection，The emitter stage of resistance R26 connecting triode Q2，Resistance R27 connection transformer T1 primary side Same Name of Ends 1，The emitter stage of the positive pole connecting triode Q2 of polarized electric capacity C18 and the terminals 4 of photoelectrical coupler U2，The minus earth of polarized electric capacity C18；nullDescribed 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，After resistance R30 and resistance R31 parallel connection，Two ends connect resistance R23 and resistance R22 respectively，The two ends of resistance R22 connect the terminals 3 of resistance R31 and photoelectrical coupler U2 respectively，Resistance R30、The copolar end ground connection of resistance R31 and resistance R22，One end of resistance R23 connects main control chip U1 pin 4，The other end connects resistance R30、The copolar end of resistance R31 and field effect transistor Q1 source electrode，One end of electric capacity C3 connects main control chip U1 pin 4，Other end ground connection，After resistance R10 is in parallel with electric capacity C9，One end connects resistance R25，The other end connects main control chip U1 pin 2，The two ends of resistance R25 connect the terminals 3 of resistance R10 and photoelectrical coupler U2 respectively，After resistance R11 is in parallel with electric capacity C8，One end connects main control chip U1 pin 3，Other end ground connection，After resistance R5 connects with resistance R4，The Same Name of Ends 1 of resistance R5 connection transformer T1，Resistance R4 connects main control chip U1 pin 3，The two ends of resistance R35 connection transformer T1 primary side non-same polarity 5 and main control chip U1 pin 5 respectively，Main control chip U1 pin 6 ground connection，Main control chip U1 pin 7 connects resistance R34.
nullAccording to embodiment of the present utility model，Described constant current constant voltage outfan adjusting control circuit includes 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；
nullAfter electric capacity C13 is in parallel with Zener diode U4，The negative pole of Zener diode U4 connects one end of resistance R15 and one end of resistance R52 and the in-phase input end of operational amplifier U3C，The plus earth of Zener diode U4，The positive voltage input of the other end concatenation operation amplifier U3D of resistance R52，The in-phase input end of the other end concatenation operation amplifier U3D of resistance R15，The negative supply voltage input end grounding of operational amplifier U3D，After resistance R20 and resistance R17 series connection，The inverting input of resistance R20 concatenation operation amplifier U3D，Resistance R17 connects the negative pole of Zener diode ZD1，The plus earth of Zener diode ZD1，The outfan of operational amplifier U3D connects the copolar end of resistance R20 and resistance R17，The inverting input of one end concatenation operation amplifier U3D of resistance R13，The other end ground connection of resistance R13，The positive voltage input of one end concatenation operation amplifier U3D of electric capacity C10，The other end ground connection of electric capacity C10，The in-phase input end of one end concatenation operation amplifier U3D of resistance R29，The other end of resistance R29 connects the negative pole of Zener diode ZD1，After resistance R39 and resistance R46 series connection，Resistance R39 connects negative pole and the in-phase input end of operational amplifier U3A of Zener diode D11，Resistance R46 connects the negative pole of Zener diode ZD1，The plus earth of Zener diode D11，One end of resistance R28 connects the copolar end of resistance R39 and resistance R46，The other end of resistance R28 connects lead-out terminal 4，The in-phase input end of one end concatenation operation amplifier U3A of electric capacity C15，The other end ground connection of electric capacity C15，The inverting input of operational amplifier U3A is connected with the outfan of operational amplifier U3A，The inverting input of one end concatenation operation amplifier U3A of resistance R8，The in-phase input end of the other end concatenation operation amplifier U3B of resistance R8，After resistance R41 and resistance R42 series connection，One end ground connection，The in-phase input end of other end concatenation operation amplifier U3B，After electric capacity C10 connects with resistance R43，The outfan of electric capacity C10 concatenation operation amplifier U3B，The inverting input of resistance R43 concatenation operation amplifier U3B，After electric capacity C14 is in parallel with resistance R51，The inverting input of one end concatenation operation amplifier U3B，Other end ground connection，The outfan of the negative pole concatenation operation amplifier U3B of diode D2，The positive pole of diode D2 connects photoelectrical coupler terminals 2，The positive pole of the cathode connecting diode D2 of diode D9，The outfan of the negative pole concatenation operation amplifier U3C of diode D9，After resistance R44 connects with electric capacity C11，The outfan of resistance R44 concatenation operation amplifier U3C，The inverting input of electric capacity C11 concatenation operation amplifier U3C，After resistance R36 and resistance R47 and resistance R45 connects，Resistance R36 connects first terminals of transformer LF3，Resistance R45 ground connection，The inverting input of the copolar end concatenation operation amplifier U3C of resistance R47 and resistance R45.
According to embodiment of the present utility model, described high frequency transformation switching circuit includes transformator T1, audion 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；
nullAfter resistance R37 and resistance R38 and electric capacity C17 parallel connection，One end connection transformer T1 primary side Same Name of Ends 1，The other end connects the negative pole of diode D10，The two ends of resistance R21 connect positive pole and the transformator T1 primary side non-same polarity 3 of D10 respectively，The two ends of resistance R24 connect terminals 1 and the emitter stage of audion Q1 of photoelectrical coupler U2 respectively，The emitter stage of the positive pole connecting triode Q1 of polarized electric capacity C6，The minus earth of polarized electric capacity C6，The base stage of the negative pole connecting triode Q1 of Zener diode D5，The plus earth of Zener diode D5，The base stage of the two ends of resistance R9 connecting triode Q1 respectively and colelctor electrode，The colelctor electrode of the positive pole connecting triode Q1 of polarized electric capacity C61，The minus earth of polarized electric capacity C61，The colelctor electrode of the negative pole connecting triode Q1 of diode D4，The positive pole connection transformer T1 secondary side non-same polarity 6 of diode D4.
According to embodiment of the present utility model, described input rectifying filter circuit includes rectifier bridge DB1, fuse F1, varistor VDR1, transformer LF1, transformer LF2, resistance R12, resistance R14, resistance R16, resistance R19, inductance L1, inductance L2, electric capacity C1, electric capacity C2；
nullOne end of fuse F1 connects ac input end，The other end connects first terminals of transformer LF1，The two ends of varistor VDR1 connect the first terminals and second terminals of transformer LF1 respectively，Resistance R16 is connected one end of resistance R19 with one end after inductance L1 parallel connection，The other end connects first terminals of transformer LF2，The other end of resistance R19 connects the 3rd terminals of transformer LF1，Resistance R12 is connected one end of resistance R14 with one end after inductance L1 parallel connection，The other end connects second terminals of transformer LF2，The other end of resistance R14 connects the 4th terminals of transformer LF1，The two ends of electric capacity C1 connect the first terminals and second terminals of transformer LF2 respectively，After resistance R2 connects with resistance R3，Resistance R2 connects first terminals of transformer LF2，Resistance R3 connects second terminals of transformer LF2，The terminals 3 of rectifier bridge DB1 connect the 3rd terminals of transformer LF2，The terminals 1 of rectifier bridge DB1 connect the 4th terminals of transformer LF2，Terminals 4 ground connection of rectifier bridge DB1，The terminals 2 connection transformer T1 primary side Same Name of Ends 1 of rectifier bridge DB1，One end connection transformer T1 primary side Same Name of Ends 1 of electric capacity C2，Other end ground connection.
According to embodiment of the present utility model, described 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；
nullAfter resistance R6 is in parallel with resistance R54，One end connects second terminals of transformer LF3，Other end ground connection，One end of resistance R53 connects second terminals of transformer LF3，The other end connects the positive pole of polarized electric capacity C16，The minus earth of polarized electric capacity C16，The positive pole of polarized electric capacity C7 connects the positive pole of polarized electric capacity C16，The negative pole of polarized electric capacity C7 connects second terminals of transformer LF3，After resistance R48 connects with resistance R49，Resistance R49 connects first terminals of transformer LF3，Resistance R48 connection transformer T1 secondary side non-same polarity 9，After diode D6 is the most in parallel with diode D7，Positive pole connection transformer T1 secondary side non-same polarity 9，Negative pole connects second terminals of transformer LF3，3rd terminals of transformer LF3 connect lead-out terminal 1，4th terminals of transformer LF3，Connect lead-out terminal 2.
Implement the technical solution of the utility model, have the advantages that this utility model multi-mode dimming power source circuit both can carry out LED light modulation at input, LED light modulation can also be carried out at outfan, change the monotype light-dimming method of prior art completely, greatly improve the convenience of LED light modulation.
Accompanying drawing explanation
Below with reference to accompanying drawing and combine example and be specifically described this utility model, advantage of the present utility model and implementation will become apparent from, wherein content shown in accompanying drawing is only used for explanation of the present utility model, and do not constitute the restriction gone up in all senses of the present utility model, in the accompanying drawings:
Fig. 1 is this utility model multi-mode dimming power source circuit module figure；
Fig. 2 is this utility model multi-mode dimming power source circuit diagram.
Detailed description of the invention
nullAs depicted in figs. 1 and 2，This utility model multi-mode dimming power source circuit includes the input rectifying filter circuit being sequentially connected、High frequency transformation switching circuit、Output rectifier and filter、Constant current constant voltage outfan adjusting control circuit，Also include adjusting control circuit，Adjusting control circuit connects input rectifying filter circuit and high frequency transformation switching circuit respectively，Wherein adjusting control circuit includes biasing power supply circuits and the control circuit being sequentially connected，Biasing power supply circuits include audion Q2、Zener diode D1、Resistance R7、Resistance R27、Resistance R26、Polarized electric capacity C18、Polarized electric capacity C4、Diode D3 and resistance R18，The base stage of the negative pole connecting triode Q2 of Zener diode D1，The plus earth of Zener diode D1，The negative pole of the cathode connecting diode D3 of polarized electric capacity C4，The minus earth of polarized electric capacity C4，One end of resistance R18 connects the positive pole of diode D3，Other end connection transformer T1 primary side non-same polarity 5，One end of resistance R7 connects the negative pole of Zener diode D1，The other end connects the positive pole of polarized electric capacity C4，After resistance R27 and resistance R26 series connection，The emitter stage of resistance R26 connecting triode Q2，Resistance R27 connection transformer T1 primary side Same Name of Ends 1，The emitter stage of the positive pole connecting triode Q2 of polarized electric capacity C18 and the terminals 4 of photoelectrical coupler U2，The minus earth of polarized electric capacity C18；nullControl 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，After resistance R30 and resistance R31 parallel connection，Two ends connect resistance R23 and resistance R22 respectively，The two ends of resistance R22 connect the terminals 3 of resistance R31 and photoelectrical coupler U2 respectively，Resistance R30、The copolar end ground connection of resistance R31 and resistance R22，One end of resistance R23 connects main control chip U1 pin 4，The other end connects resistance R30、The copolar end of resistance R31 and field effect transistor Q1 source electrode，One end of electric capacity C3 connects main control chip U1 pin 4，Other end ground connection，After resistance R10 is in parallel with electric capacity C9，One end connects resistance R25，The other end connects main control chip U1 pin 2，The two ends of resistance R25 connect the terminals 3 of resistance R10 and photoelectrical coupler U2 respectively，After resistance R11 is in parallel with electric capacity C8，One end connects main control chip U1 pin 3，Other end ground connection，After resistance R5 connects with resistance R4，The Same Name of Ends 1 of resistance R5 connection transformer T1，Resistance R4 connects main control chip U1 pin 3，The two ends of resistance R35 connection transformer T1 primary side non-same polarity 5 and main control chip U1 pin 5 respectively，Main control chip U1 pin 6 ground connection，Main control chip U1 pin 7 connects resistance R34.Constant current constant voltage outfan adjusting control circuit includes 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；nullAfter electric capacity C13 is in parallel with Zener diode U4，The negative pole of Zener diode U4 connects one end of resistance R15 and one end of resistance R52 and the in-phase input end of operational amplifier U3C，The plus earth of Zener diode U4，The positive voltage input of the other end concatenation operation amplifier U3D of resistance R52，The in-phase input end of the other end concatenation operation amplifier U3D of resistance R15，The negative supply voltage input end grounding of operational amplifier U3D，After resistance R20 and resistance R17 series connection，The inverting input of resistance R20 concatenation operation amplifier U3D，Resistance R17 connects the negative pole of Zener diode ZD1，The plus earth of Zener diode ZD1，The outfan of operational amplifier U3D connects the copolar end of resistance R20 and resistance R17，The inverting input of one end concatenation operation amplifier U3D of resistance R13，The other end ground connection of resistance R13，The positive voltage input of one end concatenation operation amplifier U3D of electric capacity C10，The other end ground connection of electric capacity C10，The in-phase input end of one end concatenation operation amplifier U3D of resistance R29，The other end of resistance R29 connects the negative pole of Zener diode ZD1，After resistance R39 and resistance R46 series connection，Resistance R39 connects negative pole and the in-phase input end of operational amplifier U3A of Zener diode D11，Resistance R46 connects the negative pole of Zener diode ZD1，The plus earth of Zener diode D11，One end of resistance R28 connects the copolar end of resistance R39 and resistance R46，The other end of resistance R28 connects lead-out terminal 4，The in-phase input end of one end concatenation operation amplifier U3A of electric capacity C15，The other end ground connection of electric capacity C15，The inverting input of operational amplifier U3A is connected with the outfan of operational amplifier U3A，The inverting input of one end concatenation operation amplifier U3A of resistance R8，The in-phase input end of the other end concatenation operation amplifier U3B of resistance R8，After resistance R41 and resistance R42 series connection，One end ground connection，The in-phase input end of other end concatenation operation amplifier U3B，After electric capacity C10 connects with resistance R43，The outfan of electric capacity C10 concatenation operation amplifier U3B，The inverting input of resistance R43 concatenation operation amplifier U3B，After electric capacity C14 is in parallel with resistance R51，The inverting input of one end concatenation operation amplifier U3B，Other end ground connection，The outfan of the negative pole concatenation operation amplifier U3B of diode D2，The positive pole of diode D2 connects photoelectrical coupler terminals 2，The positive pole of the cathode connecting diode D2 of diode D9，The outfan of the negative pole concatenation operation amplifier U3C of diode D9，After resistance R44 connects with electric capacity C11，The outfan of resistance R44 concatenation operation amplifier U3C，The inverting input of electric capacity C11 concatenation operation amplifier U3C，After resistance R36 and resistance R47 and resistance R45 connects，Resistance R36 connects first terminals of transformer LF3，Resistance R45 ground connection，The inverting input of the copolar end concatenation operation amplifier U3C of resistance R47 and resistance R45.High frequency transformation switching circuit includes transformator T1, audion 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；nullAfter resistance R37 and resistance R38 and electric capacity C17 parallel connection，One end connection transformer T1 primary side Same Name of Ends 1，The other end connects the negative pole of diode D10，The two ends of resistance R21 connect positive pole and the transformator T1 primary side non-same polarity 3 of D10 respectively，The two ends of resistance R24 connect terminals 1 and the emitter stage of audion Q1 of photoelectrical coupler U2 respectively，The emitter stage of the positive pole connecting triode Q1 of polarized electric capacity C6，The minus earth of polarized electric capacity C6，The base stage of the negative pole connecting triode Q1 of Zener diode D5，The plus earth of Zener diode D5，The base stage of the two ends of resistance R9 connecting triode Q1 respectively and colelctor electrode，The colelctor electrode of the positive pole connecting triode Q1 of polarized electric capacity C61，The minus earth of polarized electric capacity C61，The colelctor electrode of the negative pole connecting triode Q1 of diode D4，The positive pole connection transformer T1 secondary side non-same polarity 6 of diode D4.According to embodiment of the present utility model, input rectifying filter circuit includes rectifier bridge DB1, fuse F1, varistor VDR1, transformer LF1, transformer LF2, resistance R12, resistance R14, resistance R16, resistance R19, inductance L1, inductance L2, electric capacity C1, electric capacity C2；nullOne end of fuse F1 connects ac input end，The other end connects first terminals of transformer LF1，The two ends of varistor VDR1 connect the first terminals and second terminals of transformer LF1 respectively，Resistance R16 is connected one end of resistance R19 with one end after inductance L1 parallel connection，The other end connects first terminals of transformer LF2，The other end of resistance R19 connects the 3rd terminals of transformer LF1，Resistance R12 is connected one end of resistance R14 with one end after inductance L1 parallel connection，The other end connects second terminals of transformer LF2，The other end of resistance R14 connects the 4th terminals of transformer LF1，The two ends of electric capacity C1 connect the first terminals and second terminals of transformer LF2 respectively，After resistance R2 connects with resistance R3，Resistance R2 connects first terminals of transformer LF2，Resistance R3 connects second terminals of transformer LF2，The terminals 3 of rectifier bridge DB1 connect the 3rd terminals of transformer LF2，The terminals 1 of rectifier bridge DB1 connect the 4th terminals of transformer LF2，Terminals 4 ground connection of rectifier bridge DB1，The terminals 2 connection transformer T1 primary side Same Name of Ends 1 of rectifier bridge DB1，One end connection transformer T1 primary side Same Name of Ends 1 of electric capacity C2，Other end ground connection.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；nullAfter resistance R6 is in parallel with resistance R54，One end connects second terminals of transformer LF3，Other end ground connection，One end of resistance R53 connects second terminals of transformer LF3，The other end connects the positive pole of polarized electric capacity C16，The minus earth of polarized electric capacity C16，The positive pole of polarized electric capacity C7 connects the positive pole of polarized electric capacity C16，The negative pole of polarized electric capacity C7 connects second terminals of transformer LF3，After resistance R48 connects with resistance R49，Resistance R49 connects first terminals of transformer LF3，Resistance R48 connection transformer T1 secondary side non-same polarity 9，After diode D6 is the most in parallel with diode D7，Positive pole connection transformer T1 secondary side non-same polarity 9，Negative pole connects second terminals of transformer LF3，3rd terminals of transformer LF3 connect lead-out terminal 1，4th terminals of transformer LF3，Connect lead-out terminal 2.
Input rectifying filter circuit includes F1, VDR1, LF1, R19, R14, L1, L2, R16, R12, C1, LF2, DB1, C2, and wherein R19, R14 are damping resistances, it is to avoid inductance produces, with filter capacitor, the flicker that concussion causes.R19 and R14 can not be the biggest or the least simultaneously, should go to select corresponding resistance according to the wattage size of dimming power source, the value of C1 makes capacity minimum as far as possible, but can play again the effect eliminating electromagnetism Interference, and the capacity of C1 if choosing of compromising is best within 47NF.High frequency transformation switching circuit is mainly made up of high frequency transformer T1, switch triode Q1, and R37, R38, C17, D10, R21 form leakage inductance peak absorbing loop, can be transformator T1 demagnetization, absorbs leakage inductance spike, and audion Q1 is the most breakdown in protection.R27, R26, C18, Q2, D1, R7, C4, D3, R18 constitute biasing power supply circuits, also play the effect of fictitious load simultaneously.R7, D1, Q2 constitute serial regulating circuit, light modulation is to time the darkest, circuit load is the lightest, the LED voltage of output lamp string is relatively low simultaneously, the voltage of auxiliary power supply is directly proportional with the voltage of lamp string, in order to there be enough supply voltages when of relatively low, so auxiliary power supply voltage is the highest when all light, exceed the supply voltage that main control chip U1 can bear, being accomplished by this serial regulating circuit to be depressured to normal running voltage, it can play the effect of fictitious load and meets the demand maintaining electric current when brightness is transferred to the darkest simultaneously.Brightness adjustment control work process is mainly realized by main control chip U1 and capacitance-resistance loop about.Main control chip U1 can select the current-control type PFC IC of critical conduction mode, such as ST L6562, FAN7527 of FARICHILD company etc., the signal of dimmer obtains a voltage amplitude signal corresponding with its cut amplitude by input rectifying loop, pass through R27, R26, R11, C8 divider filter enters into main control chip U1 pin 3, the amplitude of U1 pin 4 peak point current is determined again by the multiplier within main control chip U1 and comparator, thus determine the load capacity of circuit, go to change LED current output load electric current by dimmer signal change, thus it is adjustable to realize size of current, the i.e. Dimmable of LED load.Output rectifier and filter is mainly made up of D6, D7, C16, C7, LF3, R48 and R49 is that diode carries out peak absorbing.Current constant control is made up of U3B, U3A, U3C, U3D, U4 and its peripheral capacitance resistance component, and U3B, U3A, U3C, U3D can select the operational amplifier of 4 passages, typically select LM324, it is also possible to select the preferable comparator of temperature coefficient.Wherein U3C, R36, R47, R45, R44, C11, D9 constitute constant-voltage control circuit, R36, R47, R45 determine output voltage size, the reference voltage of the normal phase input end of U3C is 2.5V, it comes from U4(model is TL431), it constitutes the reference voltage stabilizing source of 2.5V, current constant control is made up of U3B, U3A, R6, R54, R51, C14, R41, R42, R8, R6 and R54 is current regulating resistance, R41 and R42 also has R8 to be that reference voltage sets resistance.Variable resistance brightness adjustment control is mainly by U3D, ZD1, U3A, U3B completes, three kinds of signals that lead-out terminal 4 accesses can arrive optocoupler U2 by amplifier, regulation and control main control chip U1, dim, here ZD1 and D1 must select the stabilivolt of 10V, if lead-out terminal 4 input signal is 0-10V and during variable resistance signal, because the cathode voltage of ZD1 is clamped to 10V, so 0-10V signal can pass through R28, R39 is added to the normal phase input end of U3A, reference voltage is provided, if during variable resistance, the voltage of ZD1 passes through R46, R28 and external variable resistance carry out dividing potential drop, the normal phase input end of U3A is delivered to by R39, benchmark is provided to electric current regulation, thus realize light modulation reliably.If lead-out terminal 4 input signal is PWM square wave, R39 and C15 constitutes RC integrator, a DC voltage being directly proportional with pulse width will be obtained on C15, simultaneously vise the highest 10V voltage limited also by D11, this voltage will become the reference voltage of electric current regulation, thus realizes the change of electric current.
Those skilled in the art are without departing from essence of the present utility model and spirit, various deformation scheme can be had to realize this utility model, the foregoing is only the embodiment that this utility model is the most feasible, not thereby interest field of the present utility model is limited to, the equivalent structure change that all utilization this utility model description and accompanying drawing content are made, within being both contained in interest field of the present utility model.
Claims (5)
- null1. a multi-mode dimming power source circuit，It is characterized in that，Including the input rectifying filter circuit being sequentially connected、High frequency transformation switching circuit、Output rectifier and filter、Constant current constant voltage outfan adjusting control circuit，Also include adjusting control circuit，Described adjusting control circuit connects described input rectifying filter circuit and described high frequency transformation switching circuit respectively，Wherein said adjusting control circuit includes biasing power supply circuits and the control circuit being sequentially connected，Described biasing power supply circuits include audion Q2、Zener diode D1、Resistance R7、Resistance R27、Resistance R26、Polarized electric capacity C18、Polarized electric capacity C4、Diode D3 and resistance R18，The base stage of the negative pole connecting triode Q2 of Zener diode D1，The plus earth of Zener diode D1，The negative pole of the cathode connecting diode D3 of polarized electric capacity C4，The minus earth of polarized electric capacity C4，One end of resistance R18 connects the positive pole of diode D3，Other end connection transformer T1 primary side non-same polarity 5，One end of resistance R7 connects the negative pole of Zener diode D1，The other end connects the positive pole of polarized electric capacity C4，After resistance R27 and resistance R26 series connection，The emitter stage of resistance R26 connecting triode Q2，Resistance R27 connection transformer T1 primary side Same Name of Ends 1，The emitter stage of the positive pole connecting triode Q2 of polarized electric capacity C18 and the terminals 4 of photoelectrical coupler U2，The minus earth of polarized electric capacity C18；nullDescribed 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，After resistance R30 and resistance R31 parallel connection，Two ends connect resistance R23 and resistance R22 respectively，The two ends of resistance R22 connect the terminals 3 of resistance R31 and photoelectrical coupler U2 respectively，Resistance R30、The copolar end ground connection of resistance R31 and resistance R22，One end of resistance R23 connects main control chip U1 pin 4，The other end connects resistance R30、The copolar end of resistance R31 and field effect transistor Q1 source electrode，One end of electric capacity C3 connects main control chip U1 pin 4，Other end ground connection，After resistance R10 is in parallel with electric capacity C9，One end connects resistance R25，The other end connects main control chip U1 pin 2，The two ends of resistance R25 connect the terminals 3 of resistance R10 and photoelectrical coupler U2 respectively，After resistance R11 is in parallel with electric capacity C8，One end connects main control chip U1 pin 3，Other end ground connection，After resistance R5 connects with resistance R4，The Same Name of Ends 1 of resistance R5 connection transformer T1，Resistance R4 connects main control chip U1 pin 3，The two ends of resistance R35 connection transformer T1 primary side non-same polarity 5 and main control chip U1 pin 5 respectively，Main control chip U1 pin 6 ground connection，Main control chip U1 pin 7 connects resistance R34.
- nullMulti-mode dimming power source circuit the most according to claim 1，It is characterized in that: described constant current constant voltage outfan adjusting control circuit includes 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；nullAfter electric capacity C13 is in parallel with Zener diode U4，The negative pole of Zener diode U4 connects one end of resistance R15 and one end of resistance R52 and the in-phase input end of operational amplifier U3C，The plus earth of Zener diode U4，The positive voltage input of the other end concatenation operation amplifier U3D of resistance R52，The in-phase input end of the other end concatenation operation amplifier U3D of resistance R15，The negative supply voltage input end grounding of operational amplifier U3D，After resistance R20 and resistance R17 series connection，The inverting input of resistance R20 concatenation operation amplifier U3D，Resistance R17 connects the negative pole of Zener diode ZD1，The plus earth of Zener diode ZD1，The outfan of operational amplifier U3D connects the copolar end of resistance R20 and resistance R17，The inverting input of one end concatenation operation amplifier U3D of resistance R13，The other end ground connection of resistance R13，The positive voltage input of one end concatenation operation amplifier U3D of electric capacity C10，The other end ground connection of electric capacity C10，The in-phase input end of one end concatenation operation amplifier U3D of resistance R29，The other end of resistance R29 connects the negative pole of Zener diode ZD1，After resistance R39 and resistance R46 series connection，Resistance R39 connects negative pole and the in-phase input end of operational amplifier U3A of Zener diode D11，Resistance R46 connects the negative pole of Zener diode ZD1，The plus earth of Zener diode D11，One end of resistance R28 connects the copolar end of resistance R39 and resistance R46，The other end of resistance R28 connects lead-out terminal 4，The in-phase input end of one end concatenation operation amplifier U3A of electric capacity C15，The other end ground connection of electric capacity C15，The inverting input of operational amplifier U3A is connected with the outfan of operational amplifier U3A，The inverting input of one end concatenation operation amplifier U3A of resistance R8，The in-phase input end of the other end concatenation operation amplifier U3B of resistance R8，After resistance R41 and resistance R42 series connection，One end ground connection，The in-phase input end of other end concatenation operation amplifier U3B，After electric capacity C10 connects with resistance R43，The outfan of electric capacity C10 concatenation operation amplifier U3B，The inverting input of resistance R43 concatenation operation amplifier U3B，After electric capacity C14 is in parallel with resistance R51，The inverting input of one end concatenation operation amplifier U3B，Other end ground connection，The outfan of the negative pole concatenation operation amplifier U3B of diode D2，The positive pole of diode D2 connects photoelectrical coupler terminals 2，The positive pole of the cathode connecting diode D2 of diode D9，The outfan of the negative pole concatenation operation amplifier U3C of diode D9，After resistance R44 connects with electric capacity C11，The outfan of resistance R44 concatenation operation amplifier U3C，The inverting input of electric capacity C11 concatenation operation amplifier U3C，After resistance R36 and resistance R47 and resistance R45 connects，Resistance R36 connects first terminals of transformer LF3，Resistance R45 ground connection，The inverting input of the copolar end concatenation operation amplifier U3C of resistance R47 and resistance R45.
- Multi-mode dimming power source circuit the most according to claim 2, it is characterised in that: described high frequency transformation switching circuit includes transformator T1, audion 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；nullAfter resistance R37 and resistance R38 and electric capacity C17 parallel connection，One end connection transformer T1 primary side Same Name of Ends 1，The other end connects the negative pole of diode D10，The two ends of resistance R21 connect positive pole and the transformator T1 primary side non-same polarity 3 of D10 respectively，The two ends of resistance R24 connect terminals 1 and the emitter stage of audion Q1 of photoelectrical coupler U2 respectively，The emitter stage of the positive pole connecting triode Q1 of polarized electric capacity C6，The minus earth of polarized electric capacity C6，The base stage of the negative pole connecting triode Q1 of Zener diode D5，The plus earth of Zener diode D5，The base stage of the two ends of resistance R9 connecting triode Q1 respectively and colelctor electrode，The colelctor electrode of the positive pole connecting triode Q1 of polarized electric capacity C61，The minus earth of polarized electric capacity C61，The colelctor electrode of the negative pole connecting triode Q1 of diode D4，The positive pole connection transformer T1 secondary side non-same polarity 6 of diode D4.
- Multi-mode dimming power source circuit the most according to claim 3, it is characterised in that: described input rectifying filter circuit includes rectifier bridge DB1, fuse F1, varistor VDR1, transformer LF1, transformer LF2, resistance R12, resistance R14, resistance R16, resistance R19, inductance L1, inductance L2, electric capacity C1, electric capacity C2；nullOne end of fuse F1 connects ac input end，The other end connects first terminals of transformer LF1，The two ends of varistor VDR1 connect the first terminals and second terminals of transformer LF1 respectively，Resistance R16 is connected one end of resistance R19 with one end after inductance L1 parallel connection，The other end connects first terminals of transformer LF2，The other end of resistance R19 connects the 3rd terminals of transformer LF1，Resistance R12 is connected one end of resistance R14 with one end after inductance L1 parallel connection，The other end connects second terminals of transformer LF2，The other end of resistance R14 connects the 4th terminals of transformer LF1，The two ends of electric capacity C1 connect the first terminals and second terminals of transformer LF2 respectively，After resistance R2 connects with resistance R3，Resistance R2 connects first terminals of transformer LF2，Resistance R3 connects second terminals of transformer LF2，The terminals 3 of rectifier bridge DB1 connect the 3rd terminals of transformer LF2，The terminals 1 of rectifier bridge DB1 connect the 4th terminals of transformer LF2，Terminals 4 ground connection of rectifier bridge DB1，The terminals 2 connection transformer T1 primary side Same Name of Ends 1 of rectifier bridge DB1，One end connection transformer T1 primary side Same Name of Ends 1 of electric capacity C2，Other end ground connection.
- Multi-mode dimming power source circuit the most according to claim 4, it is characterised in that: described 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；nullAfter resistance R6 is in parallel with resistance R54，One end connects second terminals of transformer LF3，Other end ground connection，One end of resistance R53 connects second terminals of transformer LF3，The other end connects the positive pole of polarized electric capacity C16，The minus earth of polarized electric capacity C16，The positive pole of polarized electric capacity C7 connects the positive pole of polarized electric capacity C16，The negative pole of polarized electric capacity C7 connects second terminals of transformer LF3，After resistance R48 connects with resistance R49，Resistance R49 connects first terminals of transformer LF3，Resistance R48 connection transformer T1 secondary side non-same polarity 9，After diode D6 is the most in parallel with diode D7，Positive pole connection transformer T1 secondary side non-same polarity 9，Negative pole connects second terminals of transformer LF3，3rd terminals of transformer LF3 connect lead-out terminal 1，4th terminals of transformer LF3，Connect lead-out terminal 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620469027.XU CN205657889U (en) | 2016-05-23 | 2016-05-23 | Multi -mode power supply circuit that adjusts luminance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620469027.XU CN205657889U (en) | 2016-05-23 | 2016-05-23 | Multi -mode power supply circuit that adjusts luminance |
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| CN205657889U true CN205657889U (en) | 2016-10-19 |
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| CN201620469027.XU Withdrawn - After Issue CN205657889U (en) | 2016-05-23 | 2016-05-23 | Multi -mode power supply circuit that adjusts luminance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105873278A (en) * | 2016-05-23 | 2016-08-17 | 东莞市领冠半导体照明有限公司 | Multi-mode light-dimming power circuit |
| CN112327032A (en) * | 2020-10-26 | 2021-02-05 | 保定市冀中电力设备有限责任公司 | Electronic electricity-taking mutual inductor |
-
2016
- 2016-05-23 CN CN201620469027.XU patent/CN205657889U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105873278A (en) * | 2016-05-23 | 2016-08-17 | 东莞市领冠半导体照明有限公司 | Multi-mode light-dimming power circuit |
| CN112327032A (en) * | 2020-10-26 | 2021-02-05 | 保定市冀中电力设备有限责任公司 | Electronic electricity-taking mutual inductor |
| CN112327032B (en) * | 2020-10-26 | 2022-10-14 | 保定市冀中电力设备有限责任公司 | Electronic electricity-taking mutual inductor |
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