CN204598423U - A kind of multiple-channel output single-ended flyback LED drive power circuit - Google Patents
A kind of multiple-channel output single-ended flyback LED drive power circuit Download PDFInfo
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Abstract
The utility model discloses a kind of multiple-channel output single-ended flyback LED drive power circuit, comprising: input filter module, pulse width modulation module, transformer, output rectification filter module, Drazin inverse module and multiple supply module; Described input filter module connects Drazin inverse module by pulse width modulation module, and described output rectification filter module is connected input filter module by transformer with pulse width modulation module successively; Described multiple supply module is connected input filter module by transformer with pulse width modulation module respectively successively; Adopt the secondary winding of transformer to power to LED, simplify the structure, greatly reduce cost.
Description
Technical field
The utility model relates to LED drive power technical field, particularly a kind of multiple-channel output single-ended flyback LED drive power circuit.
Background technology
In prior art, LED application is more and more extensive, but LED generally adopts direct current supply, and civil power is generally alternating current, therefore between civil power and LED, has LED drive power.Single-end flyback switching power supply is widely used in middle low power LED drive power.The feature of single-ended reverse exciting circuit is: circuit is simple, compact and cost is low.The usual design relating to the LED drive power of multiple-channel output is: single-ended reverse exciting circuit realizes AC/DC conversion, obtains a galvanic current pressure, then realizes DC/DC by special IC and changes thus obtain constant current output.Multipath LED constant current exports, and is normally changed by AC/DC, and then DC/DC conversion, realizes multiple-channel output, adds cost on the one hand, adds the area of pcb board on the other hand.Meanwhile, adopt that DC/DC conversion realizes multiple-channel output, its controls IC that (is such as greater than 100V) when output voltage is higher select quite difficult, even cannot realize.Existing LED drive power circuit, its circuit cost is high, and conversion efficiency is low, and circuit structure is complicated.
Thus prior art need to improve.
Utility model content
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is to provide a kind of multiple-channel output single-ended flyback LED drive power circuit, and be intended to solve existing LED drive power circuit, circuit cost is high, conversion efficiency is low, the problem of circuit structure complexity.
In order to achieve the above object, the utility model takes following technical scheme:
A kind of multiple-channel output single-ended flyback LED drive power circuit, wherein, comprising:
For carrying out the input filter module of filtering to input signal;
For the pulse width modulation module of modulating input signal pulsewidth;
For input signal being converted to the transformer of output signal transmitted power;
For carrying out the output rectification filter module of rectifying and wave-filtering to output signal;
Multiple supply module for powering to LED;
For the Drazin inverse module of regulation output signal voltage current value;
Described input filter module connects Drazin inverse module by pulse width modulation module, and described output rectification filter module is connected input filter module by transformer with pulse width modulation module successively; Described multiple supply module is connected input filter module by transformer with pulse width modulation module respectively successively.
Described multiple-channel output single-ended flyback LED drive power circuit, wherein, described transformer comprises the first armature winding, the second armature winding, the first secondary winding, second subprime winding, for the third time level winding and the 4th secondary winding; Multiple supply module is respectively the first supply module, the second supply module and the 3rd supply module; Multiple LED is respectively a LED, the 2nd LED and the 3rd LED;
Described pulse width modulation module connects the first armature winding, also by the second armature winding ground connection; Described first secondary winding is by output rectification filter model calling feeder ear; Described second subprime winding connects a LED by the first supply module; Described third time, level winding connected the 2nd LED by the second supply module; Described 4th secondary winding connects the 3rd LED by the 3rd supply module; Described 4th secondary winding also connects power end.
Described multiple-channel output single-ended flyback LED drive power circuit, wherein, described output rectification filter module comprises: the first triode, the 9th diode, the tenth diode, the 21 resistance, the tenth electric capacity, the 11 electric capacity, the 12 electric capacity, the 13 electric capacity and the 22 electric capacity;
The anode of described 9th diode connects one end of the first secondary winding, and the anode of described 9th diode also connects the negative electrode of the 9th diode by the tenth electric capacity; The negative electrode of described 9th diode connects the other end of the first secondary winding by the 11 electric capacity; The negative electrode of described 9th diode is also successively by the 11 electric capacity and the 22 capacity earth; The negative electrode of described 9th diode also connects the anode of the tenth diode by the 11 electric capacity, the negative electrode of described tenth diode connects the base stage of the first triode; The negative electrode of described 9th diode connects the collector electrode of the first triode; The negative electrode of described 9th diode also connects the base stage of the first triode by the 21 resistance; The emitter of described first triode connects feeder ear; The emitter of described first triode is also successively by the 12 electric capacity and the 22 capacity earth; The emitter of described first triode is successively by the 13 electric capacity and the 22 capacity earth.
Described multiple-channel output single-ended flyback LED drive power circuit, wherein, described first supply module comprises: the 11 diode, the 14 electric capacity, the 17 electric capacity and the 22 resistance; The anode of described 11 diode connects one end of second subprime winding, and the anode of described 11 diode also connects the negative electrode of described 11 diode by the 14 electric capacity; The negative electrode of described 11 diode connects the positive pole of a LED, and the negative electrode of described 11 diode is also connected the other end of second subprime winding successively with the 22 resistance by the 17 electric capacity; The negative electrode of described 11 diode also connects the negative pole of a LED by the 17 electric capacity.
Described multiple-channel output single-ended flyback LED drive power circuit, wherein, described second supply module comprises: the 12 diode, the 15 electric capacity, the 18 electric capacity and the 23 resistance; The anode of described 12 diode connects one end of third time level winding, and the anode of described 12 diode also connects the negative electrode of described 12 diode by the 15 electric capacity; The negative electrode of described 12 diode connects the positive pole of the 2nd LED, and the negative electrode of described 12 diode is also connected the other end of third time level winding successively with the 23 resistance by the 18 electric capacity; The negative electrode of described 12 diode also connects the negative pole of the 2nd LED by the 18 electric capacity.
Described multiple-channel output single-ended flyback LED drive power circuit, wherein, described 3rd supply module comprises: the 13 diode, the 16 electric capacity, the 19 electric capacity and the 24 resistance; The anode of described 13 diode connects one end of the 4th secondary winding, and the anode of described 13 diode also connects the negative electrode of described 13 diode by the 16 electric capacity; The negative electrode of described 13 diode connects the positive pole of the 3rd LED, and the negative electrode of described 13 diode is also connected the other end of the 4th secondary winding successively with the 24 resistance by the 19 electric capacity; The negative electrode of described 13 diode also connects the negative pole of the 3rd LED by the 19 electric capacity; The other end of described 4th secondary winding connects power end; The negative electrode of described 13 diode is also secondary passes through the 19 electric capacity and the 22 capacity earth.
Described multiple-channel output single-ended flyback LED drive power circuit, wherein, described Drazin inverse module comprises: the 14 diode, the 15 diode, the 20 electric capacity, the 21 electric capacity, the 23 electric capacity, the 24 electric capacity, the first chip, the 26 resistance, the 27 resistance, the 28 resistance, the 29 resistance, the 30 resistance, the 31 resistance, the 32 resistance, the 33 resistance, the 34 resistance, the 35 resistance;
1st end of described first chip connects the 2nd end of the first chip by the 21 electric capacity; 1st end of described first chip is also connected the 2nd end of the first chip successively with the 20 electric capacity by the 28 resistance; 1st end of described first chip also connects the negative electrode of the 14 diode by the 29 resistance, the anode of described 14 diodes connects pulse width modulation module; 2nd end of described first chip is successively by the 27 resistance and the 22 capacity earth, and the 2nd end of described first chip also connects the 3rd supply module by the 26 resistance; Logical 35 resistance of 3rd end of described first chip connects feeder ear, and the 3rd end of described first chip also connects the 5th end of the first chip by the 33 resistance, the 4th end of described first chip is by the 22 capacity earth; 5th end of described first chip is successively by the 30 resistance and the 22 capacity earth; 6th end of described first chip connects power end by the 31 resistance, 6th end of described first chip is also connected the negative electrode of the 15 diode successively with the 30 resistance by the 32 resistance, the 23 electric capacity, 6th end of described first chip is also connected the negative electrode of the 15 diode successively with the 30 resistance by the 24 electric capacity, the anode of described 15 diode connects pulse width modulation module; 7th end of described first chip connects the negative electrode of the 15 diode by the 30 resistance; 8th end of described first chip connects power end.
Described multiple-channel output single-ended flyback LED drive power circuit, wherein, described pulse width modulation module comprises: the 25 resistance and optocoupler; The negative electrode of described optocoupler connects the anode of the 14 diode and the anode of the 15 diode respectively; The anode of described optocoupler connects feeder ear by the 25 resistance.
Described multiple-channel output single-ended flyback LED drive power circuit, wherein, the model of described first chip is TSM103AIW; Described first triode is NPN triode.
Compared to prior art, a kind of multiple-channel output single-ended flyback LED drive power circuit that the utility model provides, efficiently solve existing LED drive power circuit, circuit cost is high, conversion efficiency is low, the problem of circuit structure complexity, comprising: input filter module, pulse width modulation module, transformer, output rectification filter module, Drazin inverse module and multiple supply module; Described input filter module connects Drazin inverse module by pulse width modulation module, and described output rectification filter module is connected input filter module by transformer with pulse width modulation module successively; Described multiple supply module is connected input filter module by transformer with pulse width modulation module respectively successively; Adopt the secondary winding of transformer to power to LED, simplify the structure, greatly reduce cost, bring and facilitate greatly, there is larger application prospect.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model multiple-channel output single-ended flyback LED drive power circuit preferred embodiment.
Embodiment
The utility model provides a kind of multiple-channel output single-ended flyback LED drive power circuit, for making the purpose of this utility model, technical scheme and effect clearly, clearly, further describes the utility model referring to the accompanying drawing embodiment that develops simultaneously.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, Fig. 1 is the circuit diagram of the utility model multiple-channel output single-ended flyback LED drive power circuit preferred embodiment.As shown in the figure, described multiple-channel output single-ended flyback LED drive power circuit, comprising: for carrying out the input filter module 110 of filtering to input signal; For the pulse width modulation module 120 of modulating input signal pulsewidth; For input signal being converted to the transformer (L shown in Fig. 1) of output signal transmitted power; For carrying out the output rectification filter module 140 of rectifying and wave-filtering to output signal; Multiple supply module for powering to LED; For the Drazin inverse module 160 of regulation output signal voltage current value; Described input filter module 110 connects Drazin inverse module 160 by pulse width modulation module 120, and described output rectification filter module 140 is connected input filter module 110 by transformer L with pulse width modulation module 120 successively; Described multiple supply module is connected input filter module 110 by transformer L with pulse width modulation module 120 respectively successively.
Specifically, described input filter module 110 and pulse width modulation module 120 are existing single-ended reverse exciting circuit.Input filter module 110 pairs of input signals (such as civil power) carry out filtering, carry out pulse-width modulation by entering pulse width modulation module 120 after rectifier bridge rectification.Pulse width modulation module 120 comprises the second chip IC 2, controls circuit of reversed excitation, and its model can be FAN6300 etc.Circuit of the prior art is about input filter module 110 and pulse width modulation module 120.The circuit structure of described multiple supply module is identical, all powers to LED.In the utility model, adopt 3 supply modules to be respectively three LED and power.3 supply modules are respectively the first supply module 151, second supply module 152 and the 3rd supply module 153.Three corresponding LED are respectively a LED, the 2nd LED and the 3rd LED.When practical application, two supply modules can be adopted, also can adopt the supply module of more than 3, can arrange according to the actual requirements.Described transformer L comprises the first armature winding 131, second armature winding 132, first secondary winding 133, second subprime winding 134, for the third time level winding 135 and the 4th secondary winding 136.Described first armature winding 131 is connected pulse width modulation module 120 with the second armature winding 132 correspondence, specifically as shown in Figure 1.The Same Name of Ends ground connection of described second armature winding 132, different name end connects pulse width modulation module 120.Described first secondary winding 133 correspondence connects output rectification filter module 140.AC is converted to DC by described transformer L, is then regulated the voltage and current size of supply module by output rectification filter module 140 and Drazin inverse module 160, thus realizes constant current output to multiple LED.In the utility model, described second subprime winding 134, for the third time level winding 135 and the 4th secondary winding 136 respectively correspondence are connected the first supply module 151, second supply module 152 and the 3rd supply module 153 one by one.
As shown in Figure 1, described pulse width modulation module 120 connects the first armature winding 131, also by the second armature winding 132 ground connection; Described first secondary winding 133 connects feeder ear VDC by output rectification filter module 140; Described second subprime winding 134 connects a LED by the first supply module 151; Described third time, level winding 135 connected the 2nd LED by the second supply module 152; Described 4th secondary winding 136 connects the 3rd LED by the 3rd supply module 153; Described 4th secondary winding 136 also connects power end VC.
Further, described output rectification filter module 140 comprises: the first triode S1, the 9th diode D9, the tenth diode D10, the 21 resistance R21, the tenth electric capacity C10, the 11 electric capacity C11, the 12 electric capacity C12, the 13 electric capacity C13 and the 22 electric capacity C22;
The anode of described 9th diode D9 connects one end (different name end) of the first secondary winding 133, and the anode of described 9th diode D9 also connects the negative electrode of the 9th diode D9 by the tenth electric capacity C10; The negative electrode of described 9th diode D9 connects the other end (Same Name of Ends) of the first secondary winding 133 by the 11 electric capacity C11; The negative electrode of described 9th diode D9 is also successively by the 11 electric capacity C11 and the 22 electric capacity C22 ground connection; The negative electrode of described 92 pole D9 pipe also connects the anode of the tenth diode D10 by the 11 electric capacity C11, the negative electrode of described tenth diode D10 connects the base stage of the first triode S1; The negative electrode of described 9th diode D9 connects the collector electrode of the first triode S1; The negative electrode of described 9th diode D9 also connects the base stage of the first triode S1 by the 21 resistance R21; The emitter of described first triode S1 connects feeder ear VDC; The emitter of described first triode S1 is also successively by the 12 electric capacity C12 and the 22 electric capacity C22 ground connection; The emitter of described first triode S1 is successively by the 13 electric capacity C13 and the 22 electric capacity C22 ground connection.Specifically refer to Fig. 1, the 22 electric capacity C22 is below circuit diagram, and the Same Name of Ends of the first secondary winding 133 is by the 22 electric capacity C22 ground connection.Described first triode S1 is NPN triode.
Further, described first supply module 151 comprises: the 11 diode D11, the 14 electric capacity C14, the 17 electric capacity C17 and the 22 resistance R22; The anode of described 11 diode D11 connects one end of second subprime winding 134, and the anode of described 11 diode D11 also connects the negative electrode of described 11 diode D11 by the 14 electric capacity C14; The negative electrode of described 11 diode D11 connects the positive pole of a LED, and the negative electrode of described 11 diode D11 is also connected the other end of second subprime winding 134 successively with the 22 resistance R22 by the 17 electric capacity C17; The negative electrode of described 11 diode D11 also connects the negative pole of a LED by the 17 electric capacity C17.Specifically, the circuit of each supply module is all identical, is obtained the power passed over, then after rectifying and wave-filtering, power to LED by secondary winding from the armature winding of transformer.Because the voltage of each secondary winding is directly proportional to the number of turn, also can regulation output electric current by the number of turn of adjustment secondary winding.
Further, the circuit of the second supply module 152 is identical with the first supply module 151.Described second supply module 152 comprises: the 12 diode D12, the 15 electric capacity C15, the 18 electric capacity C18 and the 23 resistance R23; The anode of described 12 diode D12 connects one end of level winding 135 for the third time, and the anode of described 12 diode D12 also connects the negative electrode of described 12 diode D12 by the 15 electric capacity C15; The negative electrode of described 12 diode D12 connects the positive pole of the 2nd LED, and the negative electrode of described 12 diode D12 is also connected the other end of level winding 135 for the third time successively with the 23 resistance R23 by the 18 electric capacity C18; The negative electrode of described 12 diode D12 also connects the negative pole of the 2nd LED by the 18 electric capacity C18.
Further, described 3rd supply module 153 comprises: the 13 diode D13, the 16 electric capacity C16, the 19 electric capacity C19 and the 24 resistance R24; The anode of described 13 diode D13 connects one end of the 4th secondary winding 136, and the anode of described 13 diode D13 also connects the negative electrode of described 13 diode D13 by the 16 electric capacity C16; The negative electrode of described 13 diode D13 connects the positive pole of the 3rd LED, and the negative electrode of described 13 diode D13 is also connected the other end of the 4th secondary winding 136 successively with the 24 resistance R24 by the 19 electric capacity C19; The negative electrode of described 13 diode D13 also connects the negative pole of the 3rd LED by the 19 electric capacity C19; The other end of described 4th secondary winding 136 connects power end VC; The negative electrode of described 13 diode D13 is also secondary passes through the 19 electric capacity C19 and the 22 electric capacity C22 ground connection.
Please continue to refer to Fig. 1, described Drazin inverse module 160 comprises: the 14 diode D14, the 15 diode D15, the 20 electric capacity C20, the 21 electric capacity C21, the 23 electric capacity C23, the 24 electric capacity C24, the first chip IC the 1, the 26 resistance R26, the 27 resistance R27, the 28 resistance R28, the 29 resistance R29, the 30 resistance R30, the 31 resistance R31, the 32 resistance R32, the 33 resistance R33, the 34 resistance R34, the 35 resistance R35;
1st end of described first chip IC 1 connects the 2nd end of the first chip IC 1 by the 21 electric capacity C21; 1st end of described first chip IC 1 is also connected the 2nd end of the first chip IC 1 successively with the 20 electric capacity C20 by the 28 resistance R28; 1st end of described first chip IC 1 also connects the negative electrode of the 14 diode D14 by the 29 resistance R29, the anode of described 14 diode D14 connects the negative electrode of the optocoupler IC3 shown in pulse width modulation module 120(i.e. Fig. 1); 2nd end of described first chip IC 1 is successively by the 27 resistance R27 and the 22 electric capacity C22 ground connection, and the 2nd end of described first chip IC 1 also namely connects the negative pole of the 3rd LED by the 26 resistance R26 connection the 3rd supply module 153(); The logical 35 resistance R35 of 3rd end of described first chip IC 1 connects feeder ear VDC, 3rd end of described first chip IC 1 also connects the 5th end of the first chip IC 1 by the 33 resistance R33, the 4th end of described first chip IC 1 is by the 22 electric capacity C22 ground connection; 5th end of described first chip IC 1 is successively by the 30 resistance R30 and the 22 electric capacity C22 ground connection; 6th end of described first chip IC 1 connects power end VC by the 31 resistance R31,6th end of described first chip IC 1 is also connected the negative electrode of the 15 diode D15 successively with the 30 resistance R30 by the 32 resistance R32, the 23 electric capacity C23,6th end of described first chip IC 1 is also connected the negative electrode of the 15 diode D15 successively with the 30 resistance R30 by the 24 electric capacity C24, the anode of described 15 diode D15 connects the negative electrode of pulse width modulation module 120(i.e. optocoupler IC3); 7th end of described first chip IC 1 connects the negative electrode of the 15 diode D15 by the 30 resistance R30; 8th end of described first chip IC 1 connects feeder ear VDC.Specifically, the model of described first chip IC 1 can be TSM103AIW.This model just illustrates.
Further, described pulse width modulation module 120 comprises: the 25 resistance R25 and optocoupler IC3; The negative electrode of described optocoupler IC3 connects the anode of the 14 diode D14 and the anode of the 15 diode D15 respectively; The anode of described optocoupler IC3 connects feeder ear VDC by the 25 resistance R25.The model of optocoupler can be PC817.This model just illustrates.
Multiple-channel output single-ended flyback LED drive power circuit of the present utility model, the basic functional principle of reverse excitation circuit is: when power MOSFET (field effect transistor in pulse width modulation module 120) conducting, just by electrical power storage on the armature winding of high frequency transformer L, only when MOSFET turns off, just to secondary transmission of electric energy, because switching frequency is up to 100kHz, make high frequency transformer can quick storage, release energy, direct current can be obtained export continuously after filtering high-frequency rectifier.Feedback is gone the same way primarily of optocoupler and the first chip IC 1(TSM103AIW) and some electric capacity, resistance formation.Wherein the first chip IC 1 is the double operational of band reference voltage, by regulating the value of the 26 resistance R26 and the 27 resistance R27, and can the voltage stabilizing value of regulation output voltage.3rd pin of the first chip IC 1 is benchmark pin (Vref), and benchmark piezoelectric voltage is 2.5V.(output voltage)/2.5V=(R26+R27)/R27, by regulating the value of the 26 resistance R26 and the 27 resistance R27 can the voltage stabilizing value of regulation output voltage.Regulate the value of the 33 resistance R33 and the 34 resistance R34 can the current value of regulation output, simultaneously by adjustment the 22 resistance R22, the 23 resistance R23, the 24 resistance R24 or the number of turn of each secondary winding, the current value of adjustable output, thus realize multiple constant current output.
In sum, a kind of multiple-channel output single-ended flyback LED drive power circuit that the utility model provides, comprising: input filter module, pulse width modulation module, transformer, output rectification filter module, Drazin inverse module and multiple supply module; Described input filter module connects Drazin inverse module by pulse width modulation module, and described output rectification filter module is connected input filter module by transformer with pulse width modulation module successively; Described multiple supply module is connected input filter module by transformer with pulse width modulation module respectively successively; Adopt the secondary winding of transformer to power to LED, simplify the structure, greatly reduce cost.When practical application, only adopt two amplifiers and multiple transformer secondary output winding, the first chip can adopt the low-cost chips such as TSM103AIW, greatly reduce cost, turn DC without the need to DC, simplify circuit structure, reduce cost, improve the efficiency of circuit, bring and facilitate greatly.
Be understandable that; for those of ordinary skills; can be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the utility model.
Claims (9)
1. a multiple-channel output single-ended flyback LED drive power circuit, is characterized in that, comprising:
For carrying out the input filter module of filtering to input signal;
For the pulse width modulation module of modulating input signal pulsewidth;
For input signal being converted to the transformer of output signal transmitted power;
For carrying out the output rectification filter module of rectifying and wave-filtering to output signal;
Multiple supply module for powering to LED;
For the Drazin inverse module of regulation output signal voltage current value;
Described input filter module connects Drazin inverse module by pulse width modulation module, and described output rectification filter module is connected input filter module by transformer with pulse width modulation module successively; Described multiple supply module is connected input filter module by transformer with pulse width modulation module respectively successively.
2. multiple-channel output single-ended flyback LED drive power circuit according to claim 1, it is characterized in that, described transformer comprises the first armature winding, the second armature winding, the first secondary winding, second subprime winding, for the third time level winding and the 4th secondary winding; Multiple supply module is respectively the first supply module, the second supply module and the 3rd supply module; Multiple LED is respectively a LED, the 2nd LED and the 3rd LED;
Described pulse width modulation module connects the first armature winding, also by the second armature winding ground connection; Described first secondary winding is by output rectification filter model calling feeder ear; Described second subprime winding connects a LED by the first supply module; Described third time, level winding connected the 2nd LED by the second supply module; Described 4th secondary winding connects the 3rd LED by the 3rd supply module; Described 4th secondary winding also connects power end.
3. multiple-channel output single-ended flyback LED drive power circuit according to claim 2, it is characterized in that, described output rectification filter module comprises: the first triode, the 9th diode, the tenth diode, the 21 resistance, the tenth electric capacity, the 11 electric capacity, the 12 electric capacity, the 13 electric capacity and the 22 electric capacity;
The anode of described 9th diode connects one end of the first secondary winding, and the anode of described 9th diode also connects the negative electrode of the 9th diode by the tenth electric capacity; The negative electrode of described 9th diode connects the other end of the first secondary winding by the 11 electric capacity; The negative electrode of described 9th diode is also successively by the 11 electric capacity and the 22 capacity earth; The negative electrode of described 9th diode also connects the anode of the tenth diode by the 11 electric capacity, the negative electrode of described tenth diode connects the base stage of the first triode; The negative electrode of described 9th diode connects the collector electrode of the first triode; The negative electrode of described 9th diode also connects the base stage of the first triode by the 21 resistance; The emitter of described first triode connects feeder ear; The emitter of described first triode is also successively by the 12 electric capacity and the 22 capacity earth; The emitter of described first triode is successively by the 13 electric capacity and the 22 capacity earth.
4. multiple-channel output single-ended flyback LED drive power circuit according to claim 2, is characterized in that, described first supply module comprises: the 11 diode, the 14 electric capacity, the 17 electric capacity and the 22 resistance; The anode of described 11 diode connects one end of second subprime winding, and the anode of described 11 diode also connects the negative electrode of described 11 diode by the 14 electric capacity; The negative electrode of described 11 diode connects the positive pole of a LED, and the negative electrode of described 11 diode is also connected the other end of second subprime winding successively with the 22 resistance by the 17 electric capacity; The negative electrode of described 11 diode also connects the negative pole of a LED by the 17 electric capacity.
5. multiple-channel output single-ended flyback LED drive power circuit according to claim 2, is characterized in that, described second supply module comprises: the 12 diode, the 15 electric capacity, the 18 electric capacity and the 23 resistance; The anode of described 12 diode connects one end of third time level winding, and the anode of described 12 diode also connects the negative electrode of described 12 diode by the 15 electric capacity; The negative electrode of described 12 diode connects the positive pole of the 2nd LED, and the negative electrode of described 12 diode is also connected the other end of third time level winding successively with the 23 resistance by the 18 electric capacity; The negative electrode of described 12 diode also connects the negative pole of the 2nd LED by the 18 electric capacity.
6. multiple-channel output single-ended flyback LED drive power circuit according to claim 3, is characterized in that, described 3rd supply module comprises: the 13 diode, the 16 electric capacity, the 19 electric capacity and the 24 resistance; The anode of described 13 diode connects one end of the 4th secondary winding, and the anode of described 13 diode also connects the negative electrode of described 13 diode by the 16 electric capacity; The negative electrode of described 13 diode connects the positive pole of the 3rd LED, and the negative electrode of described 13 diode is also connected the other end of the 4th secondary winding successively with the 24 resistance by the 19 electric capacity; The negative electrode of described 13 diode also connects the negative pole of the 3rd LED by the 19 electric capacity; The other end of described 4th secondary winding connects power end; The negative electrode of described 13 diode is also secondary passes through the 19 electric capacity and the 22 capacity earth.
7. multiple-channel output single-ended flyback LED drive power circuit according to claim 3, it is characterized in that, described Drazin inverse module comprises: the 14 diode, the 15 diode, the 20 electric capacity, the 21 electric capacity, the 23 electric capacity, the 24 electric capacity, the first chip, the 26 resistance, the 27 resistance, the 28 resistance, the 29 resistance, the 30 resistance, the 31 resistance, the 32 resistance, the 33 resistance, the 34 resistance, the 35 resistance;
1st end of described first chip connects the 2nd end of the first chip by the 21 electric capacity; 1st end of described first chip is also connected the 2nd end of the first chip successively with the 20 electric capacity by the 28 resistance; 1st end of described first chip also connects the negative electrode of the 14 diode by the 29 resistance, the anode of described 14 diodes connects pulse width modulation module; 2nd end of described first chip is successively by the 27 resistance and the 22 capacity earth, and the 2nd end of described first chip also connects the 3rd supply module by the 26 resistance; Logical 35 resistance of 3rd end of described first chip connects feeder ear, and the 3rd end of described first chip also connects the 5th end of the first chip by the 33 resistance, the 4th end of described first chip is by the 22 capacity earth; 5th end of described first chip is successively by the 30 resistance and the 22 capacity earth; 6th end of described first chip connects power end by the 31 resistance, 6th end of described first chip is also connected the negative electrode of the 15 diode successively with the 30 resistance by the 32 resistance, the 23 electric capacity, 6th end of described first chip is also connected the negative electrode of the 15 diode successively with the 30 resistance by the 24 electric capacity, the anode of described 15 diode connects pulse width modulation module; 7th end of described first chip connects the negative electrode of the 15 diode by the 30 resistance; 8th end of described first chip connects feeder ear.
8. multiple-channel output single-ended flyback LED drive power circuit according to claim 7, it is characterized in that, described pulse width modulation module comprises: the 25 resistance and optocoupler; The negative electrode of described optocoupler connects the anode of the 14 diode and the anode of the 15 diode respectively; The anode of described optocoupler connects feeder ear by the 25 resistance.
9. multiple-channel output single-ended flyback LED drive power circuit according to claim 7, is characterized in that, the model of described first chip is TSM103AIW; Described first triode is NPN triode.
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| CN201520318584.7U CN204598423U (en) | 2015-05-18 | 2015-05-18 | A kind of multiple-channel output single-ended flyback LED drive power circuit |
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| CN201520318584.7U CN204598423U (en) | 2015-05-18 | 2015-05-18 | A kind of multiple-channel output single-ended flyback LED drive power circuit |
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|---|---|---|---|
| CN201520318584.7U Expired - Fee Related CN204598423U (en) | 2015-05-18 | 2015-05-18 | A kind of multiple-channel output single-ended flyback LED drive power circuit |
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| Country | Link |
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| CN (1) | CN204598423U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787853A (en) * | 2017-02-17 | 2017-05-31 | 合肥惠科金扬科技有限公司 | A kind of inverse-excitation type switch power-supply |
| CN112804792A (en) * | 2021-04-13 | 2021-05-14 | 深圳市安规科技有限公司 | Dimming power module and LED dimming device of steady voltage power supply |
-
2015
- 2015-05-18 CN CN201520318584.7U patent/CN204598423U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787853A (en) * | 2017-02-17 | 2017-05-31 | 合肥惠科金扬科技有限公司 | A kind of inverse-excitation type switch power-supply |
| CN106787853B (en) * | 2017-02-17 | 2024-05-24 | 合肥惠科金扬科技有限公司 | Flyback switching power supply |
| CN112804792A (en) * | 2021-04-13 | 2021-05-14 | 深圳市安规科技有限公司 | Dimming power module and LED dimming device of steady voltage power supply |
| CN112804792B (en) * | 2021-04-13 | 2021-07-13 | 深圳市安规科技有限公司 | Dimming power module and LED dimming device of steady voltage power supply |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 |