CN103379701B - A kind of LED drive circuit and LED lamp - Google Patents
A kind of LED drive circuit and LED lamp Download PDFInfo
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- CN103379701B CN103379701B CN201210127212.7A CN201210127212A CN103379701B CN 103379701 B CN103379701 B CN 103379701B CN 201210127212 A CN201210127212 A CN 201210127212A CN 103379701 B CN103379701 B CN 103379701B
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Abstract
The present invention is applicable to field of electronic illumination, provides a kind of LED drive circuit and LED lamp.In the present invention, divider filter module is comprised by adopting, first flyback driver module, second flyback driver module, secondary commutation filtration module, electrical parameters detection and feedback module, the LED drive circuit of isolated transmission module and switching power circuit module, identical voltage and power stage is born respectively by the flyback driver module of two series connection, and when great power LED load can be embodied as when high-power transformer provides sufficient electrical energy drive without the need to adopting, power loss is low, utilization rate of electrical is high and circuit cost is low, thus the electric energy service efficiency solved existing for prior art is low, large and the problem that cost is high of power consumption.
Description
Technical field
The invention belongs to field of electronic illumination, particularly relate to a kind of LED drive circuit and LED lamp.
Background technology
At present, LED as a kind of new type light source, due to its have that energy consumption is low, the strong and advantage that the life-span is long of brightness, be widely used in every field.
In existing high-power LED lamp (rated power is more than 150W), generally adopt forward converter driving LED luminous, and in this forward converter, need the metal-oxide-semiconductor using high-power transformer and high voltage drive, therefore the power consumption of whole forward converter is large and cost is high; And in existing low-power LED lamp (rated power is below 150W), then adopt single circuit of reversed excitation to drive to reach luminous object to LED, but, the power that circuit of reversed excitation consumes when driving LED is luminous is higher, and the electric energy service efficiency of complete machine can be caused so again to reduce.
In sum, it is low to there is electric energy service efficiency in prior art, the large and problem that cost is high of power consumption.
Summary of the invention
The object of the present invention is to provide a kind of LED drive circuit, be intended to solve electric energy service efficiency existing for prior art low, the large and problem that cost is high of power consumption.
The present invention is achieved in that a kind of LED drive circuit, is connected with LED load with DC power supply, comprises switching power circuit module, and described LED drive circuit also comprises:
Divider filter module, there is the first output and the second output, and the output of DC power supply described in input termination, after the direct current for described DC power supply being exported carries out dividing potential drop, export the equal direct current of two-way voltage from described first output and described second output respectively;
First flyback driver module, the first output of divider filter module described in input termination, the direct current for exporting the first output of described divider filter module carries out voltage transformation and rectification process and exports;
Second flyback driver module, the second output of divider filter module described in input termination, the direct current for exporting the second output of described divider filter module carries out voltage transformation and rectification process and exports;
Secondary commutation filtration module, first input end and the second input are connected with the output of described second flyback driver module with the output of described first flyback driver module respectively, 3rd input and four-input terminal are connected with the first loop end of described first flyback driver module and the first loop end of described second flyback driver module respectively, output is connected with output with the input of described LED load respectively with loop end, direct current coupling for described first flyback driver module and described second flyback driver module being exported superposes and exports after carrying out rectifying and wave-filtering,
Electrical parameters detection and feedback module, first test side and the second test side connect output and the loop end of described secondary commutation filtration module respectively, export the first feedback end of switch power module described in termination, direct current for exporting described secondary commutation filtration module carries out voltage and current detection, and corresponding output feedback signal is to described switching power circuit module;
Isolated transmission module, the output of switching power circuit module described in input termination, first drive singal end and the second drive singal end are connected with the control signal end of described second flyback driver module with the control signal end of described first flyback driver module respectively, first loop end and second servo loop end connect the second servo loop end of described first flyback driver module and the second servo loop end of described second flyback driver module respectively, for drive control signal isolated transmission extremely described first flyback driver module and the described second flyback driver module that described switching power circuit module is exported.
In the present invention, described divider filter module is comprised by adopting, described first flyback driver module, described second flyback driver module, described secondary commutation filtration module, described electrical parameters detection and feedback module, the LED drive circuit of described isolated transmission module and described switching power circuit module, identical voltage and power stage is born respectively by the flyback driver module of two series connection, and when great power LED load can be embodied as when high-power transformer provides sufficient electrical energy drive without the need to adopting, power loss is low, utilization rate of electrical is high and circuit cost is low, thus the electric energy service efficiency solved existing for prior art is low, large and the problem that cost is high of power consumption.
Accompanying drawing explanation
Fig. 1 is the function structure chart of the LED drive circuit that the embodiment of the present invention provides;
Fig. 2 is the exemplary circuit structure chart of the LED drive circuit that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In embodiments of the present invention, by adopting the LED drive circuit comprising divider filter module, the first flyback driver module, the second flyback driver module, secondary commutation filtration module, electrical parameters detection and feedback module, isolated transmission module and switching power circuit module, identical voltage and power stage is born respectively by the flyback driver module of two series connection, and when great power LED load can be embodied as when high-power transformer provides sufficient electrical energy drive without the need to adopting, power loss is low, and utilization rate of electrical is high and circuit cost is low.
Fig. 1 shows the modular structure of the LED drive circuit that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows:
LED drive circuit 100, comprises switching power circuit module 101, is connected with DC power supply 200 and LED load 300, and LED drive circuit 100 also comprises:
Divider filter module 102, there is the first output and the second output, and the output of input termination DC power supply 200, after the direct current for DC power supply 200 being exported carries out dividing potential drop, export the equal direct current of two-way voltage from its first output and the second output respectively;
First flyback driver module 103, the first output of input termination divider filter module 102, the direct current for exporting the first output of divider filter module 102 carries out voltage transformation and rectification process and exports;
Second flyback driver module 104, the second output of input termination divider filter module 102, the direct current for exporting the second output of divider filter module 102 carries out voltage transformation and rectification process and exports;
Secondary commutation filtration module 105, first input end and the second input are connected with the output of the second flyback driver module 104 with the output of the first flyback driver module 103 respectively, 3rd input and four-input terminal are connected with the first loop end of the first flyback driver module 103 and the first loop end of the second flyback driver module 104 respectively, output is connected with output with the input of LED load 300 respectively with loop end, direct current coupling for the first flyback driver module 103 and the second flyback driver module 104 being exported superposes and exports after carrying out rectifying and wave-filtering,
Electrical parameters detection and feedback module 106, first test side and the second test side connect output and the loop end of secondary commutation filtration module 105 respectively, export the first feedback end of termination switch power module 101, direct current for exporting secondary commutation filtration module 105 carries out voltage and current detection, and corresponding output feedback signal is to switching power circuit module 101;
Isolated transmission module 107, the output of input termination switch power circuit block 101, first drive singal end and the second drive singal end are connected with the control signal end of the second flyback driver module 104 with the control signal end of the first flyback driver module 103 respectively, first loop end and second servo loop end connect the second servo loop end of the first flyback driver module 103 and the second servo loop end of the second flyback driver module 104 respectively, for drive control signal isolated transmission to the first flyback driver module 103 that switching power circuit module 101 is exported and the second flyback driver module 104.
LED drive circuit 100 also comprises:
Transformer T1, the first end 1 of armature winding and the second end 2 connect the second servo loop end of the first flyback driver module 103 and the input of the second flyback driver module 104 respectively, the first end 3 of secondary winding and the second end 4 connect the second feedback end and the ground of switching power circuit module 101 respectively, for detect and the primary current feeding back the first flyback driver module 103 and the second flyback driver module 104 to switching power circuit module 101;
Be connected to the inductance L 1 between the output of secondary commutation filtration module 105 and the input of LED load 300; And
Be connected to the electric capacity C1 between the input of LED load 300 and the loop end of secondary commutation filtration module 105.
In embodiments of the present invention, switching power circuit module 101 comprises conventional Switching Power Supply control IC, IC power supply circuits and IC start-up circuit; Transformer T1 can realize detecting the primary current of the first flyback driver module 103 and the second flyback driver module 104, and combine with electrical parameters detection and feedback module 106, realize carrying out real-time electric current and voltage detecting to the elementary and secondary of whole LED drive circuit, thus make switching power circuit module 101 can adjust the duty ratio exporting pulse more exactly, improve the current constant control ability to whole LED drive circuit; Inductance L 1 and electric capacity C1 form output stage LC filter circuit and carry out filtering process to the direct current that secondary commutation filtration module 105 exports, the galvanic waveform making to export LED load 300 to is more pure noiseless, and then ensures that LED load 300 can more stably work.
Fig. 2 shows the exemplary circuit structure of the LED drive circuit that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows:
As one embodiment of the invention, divider filter module 102 comprises:
Resistance R1, resistance R2, electric capacity C2, resistance R3, resistance R4 and electric capacity C3;
The first end of resistance R1 is the input of divider filter module 102, the first end of electric capacity C2 is the first output of divider filter module 102 and is connected with the first end of resistance R1, second end of the first end connecting resistance R1 of resistance R2, second end of resistance R2 and second end of electric capacity C2 are connected to the first end of resistance R3 altogether, the first end of electric capacity C3 is the second output of divider filter module 102 and is connected with the first end of resistance R3, second end of the first end connecting resistance R3 of resistance R4, second end of resistance R4 and second end of electric capacity C3 are connected to ground altogether.
As one embodiment of the invention, the first flyback driver module 103 comprises:
Electric capacity C4, resistance R5, diode D1, transformer T2, diode D2, electric capacity C5, electric capacity C6, resistance R6, resistance R7, diode D3, diode D4, resistance R8, PNP type triode Q1, resistance R9, resistance R10 and NMOS tube Q2;
The first end of electric capacity C4 and the first end of resistance R5 are connected to the first end 1 of the armature winding of transformer T2 altogether, and the first end 1 of the armature winding of transformer T1 is the input of the first flyback driver module 103, second end of electric capacity C4 and second end of resistance R5 are connected to the negative electrode of diode D1 altogether, the anode of diode D1 connects the second end 2 of the armature winding of transformer T2, the first end 3 of the secondary winding of transformer T2 connects the anode of diode D2, second end 4 of the negative electrode of diode D2 and the secondary winding of transformer T2 is respectively output and the first loop end of the first flyback driver module 103, the first end of electric capacity C5 is the control signal end of the first flyback driver module 103, second end of electric capacity C5, the first end of electric capacity C6 and the first end of resistance R7 are connected to the anode of diode D4 altogether, second end of electric capacity C6 and the first end of resistance R6 are connected to the base stage of PNP type triode Q1 altogether, second end of the negative electrode connecting resistance R7 of diode D3, second end of resistance R6 is the second servo loop end of the first flyback driver module 103 and is connected to the collector electrode of PNP type triode Q1 altogether with the anode of diode D3, between the negative electrode that resistance R8 is connected to diode D4 and the emitter of PNP type triode Q1, the first end of resistance R9 and the first end of resistance R10 are connected to the emitter of PNP type triode Q1 altogether, second end of resistance R9 and the collector electrode of PNP type triode Q1 are connected to the source electrode of NMOS tube Q2 altogether, the source electrode of NMOS tube Q2 is the loop end of the first flyback driver module 103, the drain and gate of NMOS tube Q2 is connected with the second end 2 of the armature winding of transformer T2 and second end of resistance R10 respectively.Wherein, the electronic circuit be made up of electric capacity C4, resistance R5 and diode D1 can absorb the leakage inductance due to voltage spikes of the armature winding of transformer T2, thus the direct current making the first end 1 of the armature winding of transformer T2 obtain is noiseless, ensure the normal work of transformer T2; In addition, PNP type triode Q1 is used for when electric capacity C5 obtains high level pulse or low level pulse triggers NMOS tube Q2 conducting or cut-off, quick charge or electric discharge are carried out to the parasitic capacitance of NMOS tube Q2, thus shorten the time of NMOS tube Q2 conducting and cut-off, reach the object of fast driving NMOS tube Q2.
As one embodiment of the invention, the second flyback driver module 104 comprises:
Electric capacity C7, resistance R11, diode D5, transformer T3, the first diode D6, electric capacity C8, electric capacity C9, resistance R12, resistance R13, the second diode D6, diode D7, resistance R14, PNP type triode Q3, resistance R15, resistance R16 and NMOS tube Q4;
The first end of electric capacity C7 and the first end of resistance R11 are connected to the first end 1 of the armature winding of transformer T3 altogether, and the first end 1 of the armature winding of transformer T3 is the input of the second flyback driver module 104, second end of electric capacity C7 and second end of resistance R11 are connected to the negative electrode of diode D5 altogether, the anode of diode D5 connects the second end 2 of the armature winding of transformer T3, the first end 3 of the secondary winding of transformer T3 connects the anode of the first diode D6, second end 4 of the negative electrode of the first diode D6 and the secondary winding of transformer T3 is respectively output and the first loop end of the second flyback driver module 104, the first end of electric capacity C8 is the control signal end of the second flyback driver module 104, second end of electric capacity C8, the first end of electric capacity C9 and the first end of resistance R13 are connected to the anode of diode D7 altogether, second end of electric capacity C9 and the first end of resistance R12 are connected to the base stage of PNP type triode Q3 altogether, second end of the negative electrode connecting resistance R13 of the second diode D6, second end of resistance R12 is the second servo loop end of the second flyback driver module 104 and is connected to the collector electrode of PNP type triode Q3 altogether with the anode of the second diode D6, between the negative electrode that resistance R14 is connected to diode D7 and the emitter of PNP type triode Q3, the first end of resistance R15 and the first end of resistance R16 are connected to the emitter of PNP type triode Q3 altogether, second end of resistance R15 and the collector electrode of PNP type triode Q3 are connected to the source electrode of NMOS tube Q4 altogether, the source electrode of NMOS tube Q4 is the loop end of the second flyback driver module 104 and is connected to ground, the drain and gate of NMOS tube Q4 is connected with the second end 2 of the armature winding of transformer T3 and second end of resistance R16 respectively.Wherein, the electronic circuit be made up of electric capacity C7, resistance R11 and diode D5 can absorb the leakage inductance due to voltage spikes of the armature winding of transformer T3, thus the direct current making the first end 1 of the armature winding of transformer T3 obtain is noiseless, ensure the normal work of transformer T3; In addition, PNP type triode Q3 is used for when electric capacity C8 obtains high level pulse or low level pulse triggers NMOS tube Q4 conducting or cut-off, quick charge or electric discharge are carried out to the parasitic capacitance of NMOS tube Q4, thus shorten the time of NMOS tube Q4 conducting and cut-off, reach the object of fast driving NMOS tube Q4.
As one embodiment of the invention, secondary commutation filtration module 105 comprises:
Transformer T4, Schottky diode D8, electric capacity C10, resistance R17, storage capacitor C11, inductance L 2, storage capacitor C12 and resistance R18;
The first end 1 of first armature winding of transformer T4 and the first end 3 of the second armature winding are respectively first input end and second input of secondary commutation filtration module 105, second end 2 of first armature winding of transformer T4 and the second end 4 of the second armature winding are respectively the 3rd input and four-input terminal of secondary commutation filtration module 105, the first end 5 of the secondary winding of transformer T4 is connected with the first end of electric capacity C10 and the anode of Schottky diode D8 simultaneously, resistance R17 is connected between the negative electrode of electric capacity C10 and Schottky diode D8, the positive pole of storage capacitor C11 and the first end of inductance L 2 are connected to the negative electrode of Schottky diode D8 altogether, second end of inductance L 2 is the output of secondary commutation filtration module 105 and is connected with the positive pole of storage capacitor C12, the negative pole of storage capacitor C11, second end 6 of the secondary winding of transformer T4 and the negative pole of storage capacitor C12 are connected to equipotential ground altogether, the negative pole of the first termination storage capacitor C12 of resistance R18, second end of resistance R18 is the loop end of secondary commutation filtration module 105.
As one embodiment of the invention, electrical parameters detection and feedback module 106 comprise:
Resistance R19, resistance R20, electric capacity C13, electric capacity C14, resistance R21, electric capacity C15, electric capacity C16, resistance R22, resistance R23, electric capacity C17, resistance R24, resistance R25, resistance R26, resistance R27, electric capacity C18, electric capacity C19, resistance R28, electric capacity C20, electric capacity C21, diode D9, diode D10, TSM103 constant current chip U1 and optocoupler U2;
The first end of resistance R19 is the first test side of electrical parameters detection and feedback module 106, and simultaneously with the first end of resistance R24, the first end of resistance R25, the first end of electric capacity C14 and the supply pin VCC+ of TSM103 constant current chip U1 are connected, second end of resistance R19 simultaneously with the first end of resistance R22, the first end of electric capacity C17 and the first anti-phase input pin I1 of TSM103 constant current chip U1 are connected, the first homophase input pin NI1 of the second termination TSM103 constant current chip U1 of resistance R24, the anode of light-emitting diode in the second termination optocoupler U2 of resistance R25, the second termination equipotential ground of electric capacity C14, the first end of the second terminating resistor R23 of resistance R22, second end of resistance R23 and second end of electric capacity C17 are connected to equipotential ground altogether, the first end of resistance R20 is the second test side of electrical parameters detection and feedback module 106, second end of resistance R20 simultaneously with the first end of electric capacity C13, the first end of electric capacity C15, the first end of electric capacity C16 and the second anti-phase input pin I2 of TSM103 constant current chip U1 are connected, the second termination equipotential ground of electric capacity C13, the first end of the second terminating resistor R21 of electric capacity C15, second end of resistance R21, the negative electrode of diode D9 and second end of electric capacity C16 are connected to the second output pin OUT2 of TSM constant current chip U1 altogether, the anode of diode D9 and the anode of diode D10 are connected to the negative electrode of light-emitting diode in optocoupler U2 altogether, the negative electrode of diode D10 simultaneously with the first end of resistance R28, the first end of electric capacity C21 and the first output pin OUT1 of TSM103 constant current chip U1 are connected, the first end of the second termination capacitor C20 of resistance R28, second end of electric capacity C20 and second end of electric capacity C21 are connected to the first anti-phase input pin I1 of TSM103 constant current chip U1 altogether, the first end of resistance R26 and the first end of electric capacity C19 are connected to the first homophase input pin NI1 of TSM103 constant current chip U1 altogether, second end of resistance R26, the first end of resistance R27 and the first end of electric capacity C18 are connected to the second homophase input pin NI2 of TSM103 constant current chip U1 altogether, second end of electric capacity C19, second end of resistance R27 and second end of electric capacity C18 are connected to equipotential ground altogether, the earth terminal VCC-of TSM103 constant current chip U1 connects equipotential ground, the output of the current collection of phototriode very electrical parameters detection and feedback module 106 in optocoupler U2, the grounded emitter of phototriode in optocoupler U2.
As one embodiment of the invention, isolated transmission module 107 comprises electric capacity C22, diode D11 and transformer T5, the first end of electric capacity C22 is the input of isolated transmission module 107, the negative electrode of diode D11 connects the first end of electric capacity C22, the anode of diode D11 and second end of electric capacity C22 are connected to the first end 1 of the armature winding T5-A of transformer T5 altogether, second end 2 ground connection of the armature winding T5-A of transformer T5, the first end 3 of the first secondary winding T5-B of transformer T5 and the second end 4 are respectively the first drive singal end and the first loop end of isolated transmission module 107, the first end 5 of the second subprime winding T5-C of transformer T5 and the second end 6 are respectively the second drive singal end and the second servo loop end of isolated transmission module 107.Wherein, the electronic circuit that electric capacity C22 and diode D11 is formed absorbs for producing leakage inductance due to voltage spikes to the armature winding of transformer T5, thus ensures that transformer T5 can carry out isolated transmission to the output pulse signal of switch power circuit block 101 in glitch-free situation.
Below in conjunction with operation principle, LED drive circuit 100 is described further:
LED drive circuit 100 obtains direct current from the output of DC power supply 200 and starts working, by the resistance R1 in divider filter module 102, resistance R2, resistance R3 and resistance R4 is divided into the equal direct current of two-way voltage to the direct current that DC power supply 200 exports, and after carrying out filtering process respectively by electric capacity C2 and electric capacity C3, export the input of the first flyback driver module 103 and the input of the second flyback driver module 104 to, by transformer T2 and transformer T3, direct current equal for two-way voltage is carried out voltage transformation subsequently, and export secondary commutation filtration module 105 to after carrying out rectification process by diode D2 and the first diode D6, after the direct current exported from diode D2 and the first diode D6 being carried out coupling superposition by transformer T4, by by Schottky diode D8, the commutation sub-circuit that electric capacity C10 and resistance R17 forms carries out rectification process, and by storage capacitor C11, export after the filtering electronic circuit that inductance L 2 and storage capacitor C12 are formed carries out filtering, then export after filtering again being carried out to direct current by inductance L 1 and electric capacity C1 and work with driving LED load 300.
In LED drive circuit 100, electrical parameters detection and feedback module 106 are by carrying out electric current and voltage detecting to the output of secondary commutation filtration module 105 and loop end, and after amplification process being compared in real time to the secondary current of LED drive circuit 100 and voltage by TSM103 constant current chip U1, the two poles of the earth pressure drop of the light-emitting diode of corresponding control optocoupler U2, and then make the collector electrode of the phototriode of optocoupler U2 correspondingly produce a voltage to export switching power circuit module 101 to as feedback signal, then by switching power circuit module 101, according to the corresponding adjustment of this feedback signal, it exports the duty ratio of pulse, the pulse signal that switching power circuit module 101 exports carries out the control signal end (first end of electric capacity C5) of isolated transmission to the first flyback driver module 103 and the control signal end (first end of electric capacity C7) of the second flyback driver module 104 by transformer T5, to control the duty cycle of switching of NMOS tube Q2 and NMOS tube Q3, and then the coupled voltages that adjustment transformer T2 and transformer T3 exports is to reach the object of the output current of LED drive circuit 100 being carried out to negative feedback closed loop control, thus make secondary the exported direct current of LED drive circuit 100 be constant in a current value interval, can stabilized driving LED load 300 work.
In embodiments of the present invention, LED load 300 can be series LED lamp group or parallel connection LED lamp group, selects the DC power supply 200 with different output current value according to the electric connection mode of LED group in LED load 300 and the rated operational current of LED.
The embodiment of the present invention additionally provides a kind of LED lamp comprising above-mentioned LED drive circuit.
In embodiments of the present invention, divider filter module is comprised by adopting, first flyback driver module, second flyback driver module, secondary commutation filtration module, electrical parameters detection and feedback module, the LED drive circuit of isolated transmission module and switching power circuit module, identical voltage and power stage is born respectively by the flyback driver module of two series connection, and when great power LED load can be embodied as when high-power transformer provides sufficient electrical energy drive without the need to adopting, power loss is low, utilization rate of electrical is high and circuit cost is low, thus the electric energy service efficiency solved existing for prior art is low, large and the problem that cost is high of power consumption.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a LED drive circuit, is connected with LED load with DC power supply, comprises switching power circuit module, it is characterized in that, described LED drive circuit also comprises:
Divider filter module, there is the first output and the second output, and the output of DC power supply described in input termination, after the direct current for described DC power supply being exported carries out dividing potential drop, export the equal direct current of two-way voltage from described first output and described second output respectively;
First flyback driver module, the first output of divider filter module described in input termination, the direct current for exporting the first output of described divider filter module carries out voltage transformation and rectification process and exports;
Second flyback driver module, the second output of divider filter module described in input termination, the direct current for exporting the second output of described divider filter module carries out voltage transformation and rectification process and exports;
Secondary commutation filtration module, first input end and the second input are connected with the output of described second flyback driver module with the output of described first flyback driver module respectively, 3rd input and four-input terminal are connected with the first loop end of described first flyback driver module and the first loop end of described second flyback driver module respectively, output is connected with output with the input of described LED load respectively with loop end, direct current coupling for described first flyback driver module and described second flyback driver module being exported superposes and exports after carrying out rectifying and wave-filtering,
Electrical parameters detection and feedback module, first test side and the second test side connect output and the loop end of described secondary commutation filtration module respectively, export the first feedback end of switch power module described in termination, direct current for exporting described secondary commutation filtration module carries out voltage and current detection, and corresponding output feedback signal is to described switching power circuit module;
Isolated transmission module, the output of switching power circuit module described in input termination, first drive singal end and the second drive singal end are connected with the control signal end of described second flyback driver module with the control signal end of described first flyback driver module respectively, first loop end and second servo loop end connect the second servo loop end of described first flyback driver module and the second servo loop end of described second flyback driver module respectively, for drive control signal isolated transmission extremely described first flyback driver module and the described second flyback driver module that described switching power circuit module is exported.
2. LED drive circuit as claimed in claim 1, it is characterized in that, described divider filter module comprises:
Resistance R1, resistance R2, electric capacity C2, resistance R3, resistance R4 and electric capacity C3;
The first end of described resistance R1 is the input of described divider filter module, the first end of described electric capacity C2 is the first output of described divider filter module and is connected with the first end of described resistance R1, second end of resistance R1 described in first termination of described resistance R2, second end of described resistance R2 and second end of described electric capacity C2 are connected to the first end of described resistance R3 altogether, the first end of described electric capacity C3 is the second output of described divider filter module and is connected with the first end of described resistance R3, second end of resistance R3 described in first termination of described resistance R4, second end of described resistance R4 and second end of described electric capacity C3 are connected to ground altogether.
3. LED drive circuit as claimed in claim 1, it is characterized in that, described first flyback driver module comprises:
Electric capacity C4, resistance R5, diode D1, transformer T2, diode D2, electric capacity C5, electric capacity C6, resistance R6, resistance R7, diode D3, diode D4, resistance R8, PNP type triode Q1, resistance R9, resistance R10 and NMOS tube Q2;
The first end of described electric capacity C4 and the first end of described resistance R5 are connected to the first end of the armature winding of described transformer T2 altogether, and the first end of the armature winding of described transformer T1 is the input of the first flyback driver module, second end of described electric capacity C4 and second end of described resistance R5 are connected to the negative electrode of described diode D1 altogether, the anode of described diode D1 connects the second end of the armature winding of described transformer T2, the anode of diode D2 described in first termination of the secondary winding of described transformer T2, second end of the negative electrode of described diode D2 and the secondary winding of described transformer T2 is respectively output and the first loop end of described first flyback driver module, the first end of described electric capacity C5 is the control signal end of described first flyback driver module, second end of described electric capacity C5, the first end of described electric capacity C6 and the first end of described resistance R7 are connected to the anode of described diode D4 altogether, second end of described electric capacity C6 and the first end of described resistance R6 are connected to the base stage of described PNP type triode Q1 altogether, the negative electrode of described diode D3 connects second end of described resistance R7, second end of described resistance R6 is the second servo loop end of described first flyback driver module and is connected to the collector electrode of described PNP type triode Q1 altogether with the anode of described diode D3, between the negative electrode that described resistance R8 is connected to described diode D4 and the emitter of described PNP type triode Q1, the first end of described resistance R9 and the first end of described resistance R10 are connected to the emitter of described PNP type triode Q1 altogether, second end of described resistance R9 and the collector electrode of described PNP type triode Q1 are connected to the source electrode of described NMOS tube Q2 altogether, the drain and gate of described NMOS tube Q2 is connected with the second end of the armature winding of described transformer T2 and second end of described resistance R10 respectively.
4. LED drive circuit as claimed in claim 1, it is characterized in that, described second flyback driver module comprises:
Electric capacity C7, resistance R11, diode D5, transformer T3, the first diode D6, electric capacity C8, electric capacity C9, resistance R12, resistance R13, the second diode D6, diode D7, resistance R14, PNP type triode Q3, resistance R15, resistance R16 and NMOS tube Q4;
The first end of described electric capacity C7 and the first end of described resistance R11 are connected to the first end of the armature winding of described transformer T3 altogether, and the first end of the armature winding of described transformer T3 is the input of described second flyback driver module, second end of described electric capacity C7 and second end of described resistance R11 are connected to the negative electrode of described diode D5 altogether, the anode of described diode D5 connects the second end of the armature winding of described transformer T3, the anode of the first diode D6 described in first termination of the secondary winding of described transformer T3, second end of the negative electrode of described first diode D6 and the secondary winding of described transformer T3 is respectively output and the first loop end of described second flyback driver module, the first end of described electric capacity C8 is the control signal end of described second flyback driver module, second end of described electric capacity C8, the first end of described electric capacity C9 and the first end of described resistance R13 are connected to the anode of described diode D7 altogether, second end of described electric capacity C9 and the first end of described resistance R12 are connected to the base stage of described PNP type triode Q3 altogether, the negative electrode of described second diode D6 connects second end of described resistance R13, second end of described resistance R12 is the second servo loop end of described second flyback driver module and is connected to the collector electrode of described PNP type triode Q3 altogether with the anode of described second diode D6, between the negative electrode that described resistance R14 is connected to described diode D7 and the emitter of described PNP type triode Q3, the first end of described resistance R15 and the first end of described resistance R16 are connected to the emitter of described PNP type triode Q3 altogether, second end of described resistance R15 and the collector electrode of described PNP type triode Q3 are connected to the source electrode of described NMOS tube Q4 altogether, the source electrode of described NMOS tube Q4 is connected to ground, the drain and gate of described NMOS tube Q4 is connected with the second end of the armature winding of described transformer T3 and second end of described resistance R16 respectively.
5. LED drive circuit as claimed in claim 1, it is characterized in that, described secondary commutation filtration module comprises:
Transformer T4, Schottky diode D8, electric capacity C10, resistance R17, storage capacitor C11, inductance L 2, storage capacitor C12 and resistance R18;
The first end of first armature winding of described transformer T4 and the first end of the second armature winding are respectively first input end and second input of described secondary commutation filtration module, second end of first armature winding of described transformer T4 and the second end of the second armature winding are respectively the 3rd input and four-input terminal of described secondary commutation filtration module, the first end of the secondary winding of described transformer T4 is connected with the first end of described electric capacity C10 and the anode of described Schottky diode D8 simultaneously, described resistance R17 is connected between the negative electrode of described electric capacity C10 and described Schottky diode D8, the positive pole of described storage capacitor C11 and the first end of described inductance L 2 are connected to the negative electrode of described Schottky diode D8 altogether, second end of described inductance L 2 is the output of described secondary commutation filtration module and is connected with the positive pole of described storage capacitor C12, the negative pole of described storage capacitor C11, second end of the secondary winding of described transformer T4 and the negative pole of described storage capacitor C12 are connected to equipotential ground altogether, the negative pole of storage capacitor C12 described in first termination of described resistance R18, second end of described resistance R18 is the loop end of described secondary commutation filtration module.
6. LED drive circuit as claimed in claim 1, it is characterized in that, described electrical parameters detection and feedback module comprise:
Resistance R19, resistance R20, electric capacity C13, electric capacity C14, resistance R21, electric capacity C15, electric capacity C16, resistance R22, resistance R23, electric capacity C17, resistance R24, resistance R25, resistance R26, resistance R27, electric capacity C18, electric capacity C19, resistance R28, electric capacity C20, electric capacity C21, diode D9, diode D10, TSM103 constant current chip U1 and optocoupler U2;
The first end of described resistance R19 is the first test side of described electrical parameters detection and feedback module, and simultaneously with the first end of described resistance R24, the first end of described resistance R25, the first end of described electric capacity C14 and the supply pin of described TSM103 constant current chip U1 are connected, second end of described resistance R19 simultaneously with the first end of described resistance R22, the first end of described electric capacity C17 and the first anti-phase input pin of described TSM103 constant current chip U1 are connected, the first homophase input pin of TSM103 constant current chip U1 described in second termination of described resistance R24, the anode of light-emitting diode in optocoupler U2 described in second termination of described resistance R25, the second termination equipotential ground of described electric capacity C14, the first end of resistance R23 described in second termination of described resistance R22, second end of described resistance R23 and second end of described electric capacity C17 are connected to equipotential ground altogether, the first end of described resistance R20 is the second test side of described electrical parameters detection and feedback module, second end of described resistance R20 simultaneously with the first end of described electric capacity C13, the first end of described electric capacity C15, the first end of described electric capacity C16 and the second anti-phase input pin of described TSM103 constant current chip U1 are connected, the second termination equipotential ground of described electric capacity C13, the first end of resistance R21 described in second termination of described electric capacity C15, second end of described resistance R21, the negative electrode of described diode D9 and second end of described electric capacity C16 are connected to second output pin of described TSM constant current chip U1 altogether, the anode of described diode D9 and the anode of described diode D10 are connected to the negative electrode of light-emitting diode in described optocoupler U2 altogether, the negative electrode of described diode D10 simultaneously with the first end of described resistance R28, the first end of described electric capacity C21 and first output pin of described TSM103 constant current chip U1 are connected, the first end of electric capacity C20 described in second termination of described resistance R28, second end of described electric capacity C20 and second end of described electric capacity C21 are connected to the first anti-phase input pin of described TSM103 constant current chip U1 altogether, the first end of described resistance R26 and the first end of described electric capacity C19 are connected to the first homophase input pin of described TSM103 constant current chip U1 altogether, second end of described resistance R26, the first end of described resistance R27 and the first end of described electric capacity C18 are connected to the second homophase input pin of described TSM103 constant current chip U1 altogether, second end of described electric capacity C19, second end of described resistance R27 and second end of described electric capacity C18 are connected to equipotential ground altogether, the ground connection termination equipotential ground of described TSM103 constant current chip U1, the output of the very described electrical parameters detection of the current collection of phototriode and feedback module in described optocoupler U2, the grounded emitter of phototriode in described optocoupler U2.
7. LED drive circuit as claimed in claim 1, it is characterized in that, described isolated transmission module comprises electric capacity C22, diode D11 and transformer T5, the first end of described electric capacity C22 is the input of described isolated transmission module, the negative electrode of described diode D11 connects the first end of described electric capacity C22, the anode of described diode D11 and second end of described electric capacity C22 are connected to the first end of the armature winding of described transformer T5 altogether, second end ground connection of the armature winding of described transformer T5, the first end of first secondary winding of described transformer T5 and the second end are respectively the first drive singal end and the first loop end of described isolated transmission module, the first end of the second subprime winding of described transformer T5 and the second end are respectively the second drive singal end and the second servo loop end of described isolated transmission module.
8. a LED lamp, is characterized in that, described LED lamp comprises the LED drive circuit as described in any one of claim 1 to 7.
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| CN104486871A (en) * | 2014-11-26 | 2015-04-01 | 成都创图科技有限公司 | Bootstrap control LED (light-emitting diode) drive system based on phase shifting treatment |
| WO2017187685A1 (en) * | 2016-04-27 | 2017-11-02 | 新電元工業株式会社 | Led power supply device, and semiconductor integrated circuit |
| CN106455193B (en) * | 2016-08-18 | 2021-09-21 | 惠州市时宇虹光电科技有限公司 | LED drive power supply control circuit without auxiliary power supply |
| CN106936324A (en) * | 2016-12-29 | 2017-07-07 | 施耐德万高（天津）电气设备有限公司 | A kind of automatic transfer switching electric appliance controller power source special |
| CN106870974B (en) * | 2017-03-01 | 2020-08-11 | 深圳驰迅科技有限公司 | Multifunctional compatible lamp tube |
| CN107135593B (en) * | 2017-06-07 | 2023-12-05 | 深圳市奥金瑞科技有限公司 | Intelligent switch detection and identification circuit |
| CN111987911A (en) * | 2020-06-08 | 2020-11-24 | 江苏理工学院 | DCDC converter based on gallium nitride |
| CN115226274B (en) * | 2022-05-11 | 2023-12-19 | 广东柏科电源有限公司 | Constant-voltage LED driving power supply load detection circuit with DALI function and detection method |
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