CN103379701A - LED driving circuit and LED lamp - Google Patents
LED driving circuit and LED lamp Download PDFInfo
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- CN103379701A CN103379701A CN2012101272127A CN201210127212A CN103379701A CN 103379701 A CN103379701 A CN 103379701A CN 2012101272127 A CN2012101272127 A CN 2012101272127A CN 201210127212 A CN201210127212 A CN 201210127212A CN 103379701 A CN103379701 A CN 103379701A
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Abstract
The invention belongs to the field of electronic lighting and provides an LED driving circuit and an LED lamp. According to the LED driving circuit and the LED lamp, due to the facts that the LED driving circuit which is composed of a voltage dividing filtering module, a first flyback driving module, a second flyback driving module, a secondary rectification filtering module, an electrical parameter detection and feedback module, an isolation transmission module and a switch power circuit module is applied, the two flyback driving modules which are connected in series bear the same voltage output and the same power output, and sufficient electricity drive can be provided for a high-power LED load under the condition that the application of a high-power transformer is not needed, the power loss is low, the utilization rate of electric energy is high, and the circuit cost is low. Therefore, the problems that the utilization rate of electric energy is low, the power loss is high and cost is high in the prior art are solved.
Description
Technical field
The invention belongs to the electrical lighting field, relate in particular to a kind of led drive circuit and LED light fixture.
Background technology
At present, LED because it has the advantage that energy consumption is low, brightness is strong and the life-span is long, has been widely used in every field as a kind of new type light source.
In existing high-power LED lamp (rated power is more than the 150W), generally adopt the forward converter driving LED luminous, and need to use the metal-oxide-semiconductor of high-power transformer and high voltage drive in this forward converter, so the power consumption of whole forward converter is large and cost is high; And in existing low-power LED lamp (rated power is below the 150W), then be to adopt single circuit of reversed excitation that LED is driven to reach luminous purpose, yet, the power that circuit of reversed excitation consumes when driving LED is luminous is higher, can cause so again the electric energy service efficiency of complete machine to reduce.
In sum, prior art exists the electric energy service efficiency low, the problem that power consumption is large and cost is high.
Summary of the invention
The object of the present invention is to provide a kind of led drive circuit, it is low to be intended to solve the existing electric energy service efficiency of prior art, the problem that power consumption is large and cost is high.
The present invention is achieved in that a kind of led drive circuit, comprises the switching power circuit module, and load is connected with LED with DC power supply, and described led drive circuit also comprises:
The dividing potential drop filtration module, have the first output and the second output, and the output of input termination described DC power supply, after being used for direct current with described DC power supply output and carrying out dividing potential drop, the direct current that equates from described the first output and described the second output output two-way voltage respectively;
First instead swashs driver module, and the first output of the described dividing potential drop filtration module of input termination is used for the direct current that the first output of described dividing potential drop filtration module is exported is carried out voltage transformation and rectification processing and output;
Second instead swashs driver module, and the second output of the described dividing potential drop filtration module of input termination is used for the direct current that the second output of described dividing potential drop filtration module is exported is carried out voltage transformation and rectification processing and output;
The secondary commutation filtration module, first input end is connected with the described second anti-output that swashs driver module with the described first anti-output that swashs driver module respectively with the second input, the 3rd input and four-input terminal respectively with the described first anti-loop end that swashs driver module be connected the second anti-loop end that swashs driver module and be connected, output is connected with output with the input of described LED load respectively with the loop end, is used for will described first instead swashing driver module and the described second anti-direct current coupling that swashs driver module output and superposeing and carry out exporting behind the rectifying and wave-filtering;
Electrical parameters detection and feedback module, the first test side and the second test side connect respectively output and the loop end of described secondary commutation filtration module, the first feedback end of the described switch power module of output termination, be used for that the direct current that described secondary commutation filtration module is exported is carried out voltage and current and detect, and corresponding output feedback signal is to described switching power circuit module;
The isolation delivery module, the output of the described switching power circuit module of input termination, the first driving signal end and second drives signal end and is connected with the control signal end of the described first anti-sharp driver module and the control signal end of the described second anti-sharp driver module respectively, the first loop end and second servo loop end connect respectively described first and instead swash the loop end of driver module and the loop end of the described second anti-sharp driver module, and the drive control signal isolation that is used for that described switching power circuit module is exported is sent to the described first anti-sharp driver module and the described second anti-sharp driver module.
In the present invention, comprise described dividing potential drop filtration module by employing, the described first anti-sharp driver module, the described second anti-sharp driver module, described secondary commutation filtration module, described electrical parameters detection and feedback module, the led drive circuit of described isolation delivery module and described switching power circuit module, anti-sharp driver module by two series connection is born respectively identical voltage and power stage, and can be embodied as the great power LED load in the situation of high-power transformer and provide sufficient electric energy to drive need not to adopt, power loss is low, utilization rate of electrical height and circuit cost are low, thereby it is low to have solved the existing electric energy service efficiency of prior art, the problem that power consumption is large and cost is high.
Description of drawings
Fig. 1 is the modular structure figure of the led drive circuit that provides of the embodiment of the invention;
Fig. 2 is the exemplary circuit structure chart of the led drive circuit that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, 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, is not intended to limit the present invention.
In embodiments of the present invention, comprise dividing potential drop filtration module, the first anti-led drive circuit that swashs driver module, the second anti-sharp driver module, secondary commutation filtration module, electrical parameters detection and feedback module, isolation delivery module and switching power circuit module by employing, anti-sharp driver module by two series connection is born respectively identical voltage and power stage, and can be embodied as the great power LED load in the situation of high-power transformer and provide sufficient electric energy to drive need not to adopt, power loss is low, and utilization rate of electrical height and circuit cost are low.
Fig. 1 shows the modular structure of the led drive circuit that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows:
Dividing potential drop filtration module 102, have the first output and the second output, and the output of input termination DC power supply 200, after being used for direct current with DC power supply 200 outputs and carrying out dividing potential drop, the direct current that equates from its first output and the second output output two-way voltage respectively;
First instead swashs driver module 103, and the first output of input termination dividing potential drop filtration module 102 is used for the direct current that the first output of dividing potential drop filtration module 102 is exported is carried out voltage transformation and rectification processing and output;
Second instead swashs driver module 104, and the second output of input termination dividing potential drop filtration module 102 is used for the direct current that the second output of dividing potential drop filtration module 102 is exported is carried out voltage transformation and rectification processing and output;
Secondary commutation filtration module 105, first input end is connected with the second anti-output that swashs driver module 104 with the first anti-output that swashs driver module 103 respectively with the second input, the 3rd input and four-input terminal respectively with the first anti-loop end that swashs driver module 103 be connected the anti-loop end that swashs driver module 104 and be connected, output is connected with output with the input of LED load 300 respectively with the loop end, is used for instead swashing driver module 103 and second and instead swashing the direct current coupling stack of driver module 104 outputs and carry out exporting behind the rectifying and wave-filtering first;
Electrical parameters detection and feedback module 106, the first test side and the second test side connect respectively output and the loop end of secondary commutation filtration module 105, the first feedback end of output termination switch power module 101, be used for that the direct current that secondary commutation filtration module 105 is exported is carried out voltage and current and detect, and corresponding output feedback signal is to switching power circuit module 101;
Transformer T1, the first end 1 of armature winding and the second end 2 connect respectively the first anti-loop end and the second anti-input that swashs driver module 104 that swashs driver module 103, the first end 3 of secondary winding and the second end 4 connect respectively the second feedback end and the ground of switching power circuit module 101, for detection of and feed back first and anti-swash driver module 103 and second and instead swash the primary current of driver module 104 to switching power circuit module 101;
Be connected in the inductance L 1 between the input of the output of secondary commutation filtration module 105 and LED load 300; And
Be connected in the capacitor C 1 between the loop end of the input of LED load 300 and secondary commutation filtration module 105.
In embodiments of the present invention, switching power circuit module 101 comprises Switching Power Supply control IC, IC power supply circuits and IC start-up circuit commonly used; Transformer T1 can realize the first anti-primary current that swashs driver module 103 and the second anti-sharp driver module 104 is detected, and combine with electrical parameters detection and feedback module 106, realization is to elementary and secondary real-time electric current and the voltage detecting of carrying out of whole led drive circuit, thereby make switching power circuit module 101 can adjust more exactly the duty ratio of output pulse, improve the constant current control ability to whole led drive circuit; Inductance L 1 and capacitor C 1 composition output stage LC filter circuit carry out the filtering processing to the direct current of secondary commutation filtration module 105 outputs, make the galvanic waveform that exports LED load 300 to more pure noiseless, and then assurance LED load 300 can more stably be worked.
Fig. 2 shows the exemplary circuit structure of the led drive circuit that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows:
As one embodiment of the invention, dividing potential drop filtration module 102 comprises:
Resistance R 1, resistance R 2, capacitor C 2, resistance R 3, resistance R 4 and capacitor C 3;
The first end of resistance R 1 is the input of dividing potential drop filtration module 102, the first end of capacitor C 2 is the first output of dividing potential drop filtration module 102 and is connected with the first end of resistance R 1, the second end of the first end connecting resistance R1 of resistance R 2, the second end of resistance R 2 and the second end of capacitor C 2 are connected to the first end of resistance R 3 altogether, the first end of capacitor C 3 is the second output of dividing potential drop filtration module 102 and is connected with the first end of resistance R 3, the second end of the first end connecting resistance R3 of resistance R 4, the second end of resistance R 4 and the second end of capacitor C 3 are connected to ground altogether.
As one embodiment of the invention, the first anti-sharp driver module 103 comprises:
Capacitor C 4, resistance R 5, diode D1, transformer T2, diode D2, capacitor C 5, capacitor C 6, resistance R 6, resistance R 7, diode D3, diode D4, resistance R 8, positive-negative-positive triode Q1, resistance R 9, resistance R 10 and NMOS pipe Q2;
The first end of the first end of capacitor C 4 and resistance R 5 is 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 first anti-input that swashs driver module 103, the second end of capacitor C 4 and the second end of resistance R 5 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, the second end 4 of the secondary winding of the negative electrode of diode D2 and transformer T2 is respectively the first anti-output and loop end that swashs driver module 103, the first end of capacitor C 5 is the first anti-control signal end that swashs driver module 103, the second end of capacitor C 5, the first end of the first end of capacitor C 6 and resistance R 7 is connected to the anode of diode D4 altogether, the second end of capacitor C 6 and the first end of resistance R 6 are connected to the base stage of positive-negative-positive triode Q1 altogether, the second end of the negative electrode connecting resistance R7 of diode D3, the second end of resistance R 6 is the first anti-loop end that swashs driver module 103 and is connected to altogether the collector electrode of positive-negative-positive triode Q1 with the anode of diode D3, resistance R 8 is connected between the emitter of the negative electrode of diode D4 and positive-negative-positive triode Q1, the first end of the first end of resistance R 9 and resistance R 10 is connected to the emitter of positive-negative-positive triode Q1 altogether, the collector electrode of the second end of resistance R 9 and positive-negative-positive triode Q1 is connected to the source electrode of NMOS pipe Q2 altogether, the source electrode of NMOS pipe Q2 is the first anti-loop end that swashs driver module 103, and the drain and gate of NMOS pipe Q2 is connected with the second end that the second end 2 of the armature winding of transformer T2 is connected with resistance R respectively.Wherein, the electronic circuit that is made of capacitor C 4, resistance R 5 and diode D1 can absorb the leakage inductance due to voltage spikes of the armature winding of transformer T2, thereby the direct current that the first end 1 that makes the armature winding of transformer T2 obtains is noiseless, guarantees the normal operation of transformer T2; In addition, positive-negative-positive triode Q1 is used for when capacitor C 5 is obtained high level pulse or low level pulse triggering NMOS pipe Q2 conducting or cut-off, parasitic capacitance to NMOS pipe Q2 is carried out quick charge or discharge, thereby shorten the time of NMOS pipe Q2 conducting and cut-off, reach the purpose of fast driving NMOS pipe Q2.
As one embodiment of the invention, the second anti-sharp driver module 104 comprises:
Capacitor C 7, resistance R 11, diode D5, transformer T3, diode D6, capacitor C 8, capacitor C 9, resistance R 12, resistance R 13, diode D6, diode D7, resistance R 14, positive-negative-positive triode Q3, resistance R 15, resistance R 16 and NMOS pipe Q4;
The first end of the first end of capacitor C 7 and resistance R 11 is 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 second anti-input that swashs driver module 104, the second end of capacitor C 7 and the second end of resistance R 11 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 diode D6, the second end 4 of the secondary winding of the negative electrode of diode D6 and transformer T3 is respectively the second anti-output and loop end that swashs driver module 104, the first end of capacitor C 8 is the second anti-control signal end that swashs driver module 104, the second end of capacitor C 8, the first end of the first end of capacitor C 9 and resistance R 13 is connected to the anode of diode D7 altogether, the second end of capacitor C 9 and the first end of resistance R 12 are connected to the base stage of positive-negative-positive triode Q3 altogether, the second end of the negative electrode connecting resistance R13 of diode D6, the second end of resistance R 12 is the second anti-loop end that swashs driver module 104 and is connected to altogether the collector electrode of positive-negative-positive triode Q3 with the anode of diode D6, resistance R 14 is connected between the emitter of the negative electrode of diode D7 and positive-negative-positive triode Q3, the first end of the first end of resistance R 15 and resistance R 16 is connected to the emitter of positive-negative-positive triode Q3 altogether, the collector electrode of the second end of resistance R 15 and positive-negative-positive triode Q3 is connected to the source electrode of NMOS pipe Q4 altogether, the source electrode of NMOS pipe Q4 is second instead to swash the loop end of driver module 104 and is connected with ground, and the drain and gate that NMOS manages Q4 is connected with the second end that the second end 2 of the armature winding of transformer T3 is connected with resistance R respectively.Wherein, the electronic circuit that is made of capacitor C 7, resistance R 11 and diode D5 can absorb the leakage inductance due to voltage spikes of the armature winding of transformer T3, thereby the direct current that the first end 1 that makes the armature winding of transformer T3 obtains is noiseless, guarantees the normal operation of transformer T3; In addition, positive-negative-positive triode Q3 is used for when capacitor C 8 is obtained high level pulse or low level pulse triggering NMOS pipe Q4 conducting or cut-off, parasitic capacitance to NMOS pipe Q4 is carried out quick charge or discharge, thereby shorten the time of NMOS pipe Q4 conducting and cut-off, reach the purpose of fast driving NMOS pipe Q4.
As one embodiment of the invention, secondary commutation filtration module 105 comprises:
Transformer T4, Schottky diode D8, capacitor C 10, resistance R 17, storage capacitor C11, inductance L 2, storage capacitor C12 and resistance R 18;
The first end 1 of the 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, the second end 2 of the first armature winding of transformer T4 and the second end 4 of the second armature winding are respectively the 3rd input and the 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 capacitor C 10 and the anode of Schottky diode D8 simultaneously, resistance R 17 is connected between the negative electrode of capacitor C 10 and Schottky diode D8, the first end of the positive pole of storage capacitor C11 and inductance L 2 is connected to the negative electrode of Schottky diode D8 altogether, the 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, the 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 R 18, the second end of resistance R 18 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 R 19, resistance R 20, capacitor C 13, capacitor C 14, resistance R 21, capacitor C 15, capacitor C 16, resistance R 22, resistance R 23, capacitor C 17, resistance R 24, resistance R 25, resistance R 26, resistance R 27, capacitor C 18, capacitor C 19, resistance R 28, capacitor C 20, capacitor C 21, diode D9, diode D10, TSM103 constant current chip U1 and optocoupler U2;
The first end of resistance R 19 is the first test side of electrical parameters detection and feedback module 106, and simultaneously with the first end of resistance R 24, the first end of resistance R 25, the supply pin VCC+ of the first end of capacitor C 14 and TSM103 constant current chip U1 is connected, the second end while of resistance R 19 and the first end of resistance R 22, the first anti-phase input pin I1 of the first end of capacitor C 17 and TSM103 constant current chip U1 is connected, the first homophase input pin NI1 of the second termination TSM103 constant current chip U1 of resistance R 24, the anode of light-emitting diode among the second termination optocoupler U2 of resistance R 25, the second termination equipotential ground of capacitor C 14, the first end of the second terminating resistor R23 of resistance R 22, the second end of resistance R 23 and the second end of capacitor C 17 are connected to equipotential ground altogether, the first end of resistance R 20 is the second test side of electrical parameters detection and feedback module 106, the second end while of resistance R 20 and the first end of capacitor C 13, the first end of capacitor C 15, the second anti-phase input pin I2 of the first end of capacitor C 16 and TSM103 constant current chip U1 is connected, the second termination equipotential ground of capacitor C 13, the first end of the second terminating resistor R21 of capacitor C 15, the second end of resistance R 21, the second end of the negative electrode of diode D9 and capacitor C 16 is connected to the second output pin OUT2 of TSM constant current chip U1 altogether, the anode of the anode of diode D9 and diode D10 is connected to the negative electrode of light-emitting diode among the optocoupler U2 altogether, the negative electrode while of diode D10 and the first end of resistance R 28, the first output pin OUT1 of the first end of capacitor C 21 and TSM103 constant current chip U1 is connected, the first end of the second termination capacitor C20 of resistance R 28, the second end of capacitor C 20 and the second end of capacitor C 21 are connected to the first anti-phase input pin I1 of TSM103 constant current chip U1 altogether, the first end of the first end of resistance R 26 and capacitor C 19 is connected to the first homophase input pin NI1 of TSM103 constant current chip U1 altogether, the second end of resistance R 26, the first end of the first end of resistance R 27 and capacitor C 18 is connected to the second homophase input pin NI2 of TSM103 constant current chip U1 altogether, the second end of capacitor C 19, the second end of resistance R 27 and the second end of capacitor C 18 are connected to equipotential ground altogether, the earth terminal VCC-of TSM103 constant current chip U1 connects equipotential ground, the current collection of the phototriode output of electrical parameters detection and feedback module 106 very among the optocoupler U2, the grounded emitter of phototriode among the optocoupler U2.
As one embodiment of the invention, isolation delivery module 107 comprises capacitor C 22, diode D11 and transformer T5, the first end of capacitor C 22 is the input of isolation delivery module 107, the negative electrode of diode D11 connects the first end of capacitor C 22, the second end of the anode of diode D11 and capacitor C 22 is connected to the first end 1 of the armature winding T5-A of transformer T5 altogether, the 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 first of isolation delivery module 107 and drive signal end and the first loop end, and the first end 5 of the second subprime winding T5-C of transformer T5 and the second end 6 are respectively second of isolation delivery module 107 and drive signal end and second servo loop end.Wherein, the electronic circuit that capacitor C 22 and diode D11 consist of produces the leakage inductance due to voltage spikes for the armature winding to transformer T5 and absorbs, thereby guarantees that transformer T5 can isolate transmission to the output pulse signal of switching power circuit module 101 in glitch-free situation.
Below in conjunction with operation principle led drive circuit 100 is described further:
In led drive circuit 100, electrical parameters detection and feedback module 106 carry out electric current and voltage detecting by output and the loop end to secondary commutation filtration module 105, and after by TSM103 constant current chip U1 the secondary current of led drive circuit 100 and voltage relatively being amplified processing in real time, the two poles of the earth pressure drop of the light-emitting diode of corresponding control optocoupler U2, and then the collector electrode that makes the phototriode of optocoupler U2 correspondingly produces a voltage and exports switching power circuit module 101 to as feedback signal, then by the duty ratio of switching power circuit module 101 according to its output pulse of the corresponding adjustment of this feedback signal, the pulse signal of switching power circuit module 101 outputs is isolated control signal end (first end of capacitor C 5) and the second anti-control signal end (first end of capacitor C 7) that swashs driver module 104 that is sent to the first anti-sharp driver module 103 by transformer T5, duty cycle of switching with control NMOS pipe Q2 and NMOS pipe Q3, and then adjust coupled voltages that transformer T2 and transformer T3 export to reach the purpose of the output current of led drive circuit 100 being carried out negative feedback closed loop control, thereby the secondary direct current of exporting of led drive circuit 100 is constant in the current value interval, so that 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 to have the DC power supply 200 of different output current value according to the rated operational current of the electric connection mode of LED lamp group in the LED load 300 and LED.
The embodiment of the invention also provides a kind of LED light fixture that comprises above-mentioned led drive circuit.
In embodiments of the present invention, comprise the dividing potential drop filtration module by employing, the first anti-sharp driver module, the second anti-sharp driver module, the secondary commutation filtration module, electrical parameters detection and feedback module, the led drive circuit of isolation delivery module and switching power circuit module, anti-sharp driver module by two series connection is born respectively identical voltage and power stage, and can be embodied as the great power LED load in the situation of high-power transformer and provide sufficient electric energy to drive need not to adopt, power loss is low, utilization rate of electrical height and circuit cost are low, thereby it is low to have solved the existing electric energy service efficiency of prior art, the problem that power consumption is large and cost is high.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a led drive circuit comprises the switching power circuit module, and load is connected with LED with DC power supply, it is characterized in that described led drive circuit also comprises:
The dividing potential drop filtration module, have the first output and the second output, and the output of input termination described DC power supply, after being used for direct current with described DC power supply output and carrying out dividing potential drop, the direct current that equates from described the first output and described the second output output two-way voltage respectively;
First instead swashs driver module, and the first output of the described dividing potential drop filtration module of input termination is used for the direct current that the first output of described dividing potential drop filtration module is exported is carried out voltage transformation and rectification processing and output;
Second instead swashs driver module, and the second output of the described dividing potential drop filtration module of input termination is used for the direct current that the second output of described dividing potential drop filtration module is exported is carried out voltage transformation and rectification processing and output;
The secondary commutation filtration module, first input end is connected with the described second anti-output that swashs driver module with the described first anti-output that swashs driver module respectively with the second input, the 3rd input and four-input terminal respectively with the described first anti-loop end that swashs driver module be connected the second anti-loop end that swashs driver module and be connected, output is connected with output with the input of described LED load respectively with the loop end, is used for will described first instead swashing driver module and the described second anti-direct current coupling that swashs driver module output and superposeing and carry out exporting behind the rectifying and wave-filtering;
Electrical parameters detection and feedback module, the first test side and the second test side connect respectively output and the loop end of described secondary commutation filtration module, the first feedback end of the described switch power module of output termination, be used for that the direct current that described secondary commutation filtration module is exported is carried out voltage and current and detect, and corresponding output feedback signal is to described switching power circuit module;
The isolation delivery module, the output of the described switching power circuit module of input termination, the first driving signal end and second drives signal end and is connected with the control signal end of the described first anti-sharp driver module and the control signal end of the described second anti-sharp driver module respectively, the first loop end and second servo loop end connect respectively described first and instead swash the loop end of driver module and the loop end of the described second anti-sharp driver module, and the drive control signal isolation that is used for that described switching power circuit module is exported is sent to the described first anti-sharp driver module and the described second anti-sharp driver module.
2. led drive circuit as claimed in claim 1 is characterized in that, described dividing potential drop filtration module comprises:
Resistance R 1, resistance R 2, capacitor C 2, resistance R 3, resistance R 4 and capacitor C 3;
The first end of described resistance R 1 is the input of described dividing potential drop filtration module, the first end of described capacitor C 2 is the first output of described dividing potential drop filtration module and is connected with the first end of described resistance R 1, the second end of the described resistance R 1 of the first termination of described resistance R 2, the second end of described resistance R 2 and the second end of described capacitor C 2 are connected to the first end of described resistance R 3 altogether, the first end of described capacitor C 3 is the second output of described dividing potential drop filtration module and is connected with the first end of described resistance R 3, the second end of the described resistance R 3 of the first termination of described resistance R 4, the second end of described resistance R 4 and the second end of described capacitor C 3 are connected to ground altogether.
3. led drive circuit as claimed in claim 1 is characterized in that, the described first anti-sharp driver module comprises:
Capacitor C 4, resistance R 5, diode D1, transformer T2, diode D2, capacitor C 5, capacitor C 6, resistance R 6, resistance R 7, diode D3, diode D4, resistance R 8, positive-negative-positive triode Q1, resistance R 9, resistance R 10 and NMOS pipe Q2;
The first end of the first end of described capacitor C 4 and described resistance R 5 is 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 first anti-input that swashs driver module, the second end of described capacitor C 4 and the second end of described resistance R 5 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 the described diode D2 of the first termination of the secondary winding of described transformer T2, the second end of the secondary winding of the negative electrode of described diode D2 and described transformer T2 is respectively the described first anti-output and loop end that swashs driver module, the first end of described capacitor C 5 is the described first anti-control signal end that swashs driver module, the second end of described capacitor C 5, the first end of the first end of described capacitor C 6 and described resistance R 7 is connected to the anode of described diode D4 altogether, the second end of described capacitor C 6 and the first end of described resistance R 6 are connected to the base stage of described positive-negative-positive triode Q1 altogether, the negative electrode of described diode D3 connects the second end of described resistance R 7, the second end of described resistance R 6 is the described first anti-loop end that swashs driver module and is connected to altogether the collector electrode of described positive-negative-positive triode Q1 with the anode of described diode D3, described resistance R 8 is connected between the emitter of the negative electrode of described diode D4 and described positive-negative-positive triode Q1, the first end of the first end of described resistance R 9 and described resistance R 10 is connected to the emitter of described positive-negative-positive triode Q1 altogether, the collector electrode of the second end of described resistance R 9 and described positive-negative-positive triode Q1 is connected to the source electrode of described NMOS pipe Q2 altogether, the source electrode of described NMOS pipe Q2 is the described first anti-loop end that swashs driver module, the drain and gate of described NMOS pipe Q2 respectively with the second end of the armature winding of described transformer T2 be connected the second end of resistance R 10 and be connected.
4. led drive circuit as claimed in claim 1 is characterized in that, the described second anti-sharp driver module comprises:
Capacitor C 7, resistance R 11, diode D5, transformer T3, diode D6, capacitor C 8, capacitor C 9, resistance R 12, resistance R 13, diode D6, diode D7, resistance R 14, positive-negative-positive triode Q3, resistance R 15, resistance R 16 and NMOS pipe Q4;
The first end of the first end of described capacitor C 7 and described resistance R 11 is 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 described second anti-input that swashs driver module, the second end of described capacitor C 7 and the second end of described resistance R 11 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 described diode D6 of the first termination of the secondary winding of described transformer T3, the second end of the secondary winding of the negative electrode of described diode D6 and described transformer T3 is respectively the described second anti-output and loop end that swashs driver module, the first end of described capacitor C 8 is the described second anti-control signal end that swashs driver module, the second end of described capacitor C 8, the first end of the first end of described capacitor C 9 and described resistance R 13 is connected to the anode of described diode D7 altogether, the second end of described capacitor C 9 and the first end of described resistance R 12 are connected to the base stage of described positive-negative-positive triode Q3 altogether, the negative electrode of described diode D6 connects the second end of described resistance R 13, the second end of described resistance R 12 is the described second anti-loop end that swashs driver module and is connected to altogether the collector electrode of described positive-negative-positive triode Q3 with the anode of described diode D6, described resistance R 14 is connected between the emitter of the negative electrode of described diode D7 and described positive-negative-positive triode Q3, the first end of the first end of described resistance R 15 and described resistance R 16 is connected to the emitter of described positive-negative-positive triode Q3 altogether, the collector electrode of the second end of described resistance R 15 and described positive-negative-positive triode Q3 is connected to the source electrode of described NMOS pipe Q4 altogether, the source electrode of described NMOS pipe Q4 is described second instead to swash the loop end of driver module and is connected with ground, the drain and gate that described NMOS manages Q4 respectively with the second end of the armature winding of described transformer T3 be connected the second end of resistance R 16 and be connected.
5. led drive circuit as claimed in claim 1 is characterized in that, described secondary commutation filtration module comprises:
Transformer T4, Schottky diode D8, capacitor C 10, resistance R 17, storage capacitor C11, inductance L 2, storage capacitor C12 and resistance R 18;
The first end of the 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, the second end of the first armature winding of described transformer T4 and the second end of the second armature winding are respectively the 3rd input and the 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 capacitor C 10 and the anode of described Schottky diode D8 simultaneously, described resistance R 17 is connected between the negative electrode of described capacitor C 10 and described Schottky diode D8, the first end of the positive pole of described storage capacitor C11 and described inductance L 2 is connected to the negative electrode of described Schottky diode D8 altogether, the 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, the 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 the described storage capacitor C12 of the first termination of described resistance R 18, the second end of described resistance R 18 is the loop end of described secondary commutation filtration module.
6. led drive circuit as claimed in claim 1 is characterized in that, described electrical parameters detection and feedback module comprise:
Resistance R 19, resistance R 20, capacitor C 13, capacitor C 14, resistance R 21, capacitor C 15, capacitor C 16, resistance R 22, resistance R 23, capacitor C 17, resistance R 24, resistance R 25, resistance R 26, resistance R 27, capacitor C 18, capacitor C 19, resistance R 28, capacitor C 20, capacitor C 21, diode D9, diode D10, TSM103 constant current chip U1 and optocoupler U2;
The first end of described resistance R 19 is the first test side of described electrical parameters detection and feedback module, and simultaneously with the first end of described resistance R 24, the first end of described resistance R 25, the supply pin of the first end of described capacitor C 14 and described TSM103 constant current chip U1 is connected, the second end while of described resistance R 19 and the first end of described resistance R 22, the first anti-phase input pin of the first end of described capacitor C 17 and described TSM103 constant current chip U1 is connected, the first homophase input pin of the described TSM103 constant current chip of the second termination U1 of described resistance R 24, the anode of light-emitting diode among the described optocoupler U2 of the second termination of described resistance R 25, the second termination equipotential ground of described capacitor C 14, the first end of the described resistance R 23 of the second termination of described resistance R 22, the second end of described resistance R 23 and the second end of described capacitor C 17 are connected to equipotential ground altogether, the first end of described resistance R 20 is the second test side of described electrical parameters detection and feedback module, the second end while of described resistance R 20 and the first end of described capacitor C 13, the first end of described capacitor C 15, the second anti-phase input pin of the first end of described capacitor C 16 and described TSM103 constant current chip U1 is connected, the second termination equipotential ground of described capacitor C 13, the first end of the described resistance R 21 of the second termination of described capacitor C 15, the second end of described resistance R 21, the second end of the negative electrode of described diode D9 and described capacitor C 16 is connected to the second output pin of described TSM constant current chip U1 altogether, the anode of the anode of described diode D9 and described diode D10 is connected to the negative electrode of light-emitting diode among the described optocoupler U2 altogether, the negative electrode while of described diode D10 and the first end of described resistance R 28, the first output pin of the first end of described capacitor C 21 and described TSM103 constant current chip U1 is connected, the first end of the described capacitor C 20 of the second termination of described resistance R 28, the second end of described capacitor C 20 and the second end of described capacitor C 21 are connected to the first anti-phase input pin of described TSM103 constant current chip U1 altogether, the first end of the first end of described resistance R 26 and described capacitor C 19 is connected to the first homophase input pin of described TSM103 constant current chip U1 altogether, the second end of described resistance R 26, the first end of the first end of described resistance R 27 and described capacitor C 18 is connected to the second homophase input pin of described TSM103 constant current chip U1 altogether, the second end of described capacitor C 19, the second end of described resistance R 27 and the second end of described capacitor C 18 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 among the described optocoupler U2, the grounded emitter of phototriode among the described optocoupler U2.
7. led drive circuit as claimed in claim 1, it is characterized in that, described isolation delivery module comprises capacitor C 22, diode D11 and transformer T5, the first end of described capacitor C 22 is the input of described isolation delivery module, the negative electrode of described diode D11 connects the first end of described capacitor C 22, the second end of the anode of described diode D11 and described capacitor C 22 is connected to the first end of the armature winding of described transformer T5 altogether, the second end ground connection of the armature winding of described transformer T5, the first end of the first secondary winding of described transformer T5 and the second end are respectively first of described isolation delivery module and drive signal end and the first loop end, and the first end of the second subprime winding of described transformer T5 and the second end are respectively second of described isolation delivery module and drive signal end and second servo loop end.
8. a LED light fixture is characterized in that, described LED light fixture comprises such as each described led drive circuit of claim 1 to 7.
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| CN201210127212.7A CN103379701B (en) | 2012-04-26 | 2012-04-26 | A kind of LED drive circuit and LED lamp |
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| CN201210127212.7A CN103379701B (en) | 2012-04-26 | 2012-04-26 | A kind of LED drive circuit and LED lamp |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104853507A (en) * | 2014-11-26 | 2015-08-19 | 成都冠深科技有限公司 | Bootstrap control LED driving system based on capacitance feedback three-point type oscillation circuit |
| CN106455193A (en) * | 2016-08-18 | 2017-02-22 | 惠州市时宇虹光电科技有限公司 | LED driving power supply control circuit with no auxiliary power supply |
| CN106870974A (en) * | 2017-03-01 | 2017-06-20 | 深圳驰迅科技有限公司 | A kind of Multi-function compatible type fluorescent tube |
| 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 |
| CN107135593A (en) * | 2017-06-07 | 2017-09-05 | 深圳市奥金瑞科技有限公司 | Intelligent switch is detected and identification circuit |
| TWI625985B (en) * | 2016-04-27 | 2018-06-01 | Shindengen Electric Manufacturing Co Ltd | LED power supply device and semiconductor integrated circuit |
| CN111987911A (en) * | 2020-06-08 | 2020-11-24 | 江苏理工学院 | DCDC converter based on gallium nitride |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050269974A1 (en) * | 2005-04-29 | 2005-12-08 | Ravindra Thotakura V | Multi-phase input dimming ballast with flyback converter and method therefor |
| CN101572972A (en) * | 2009-06-04 | 2009-11-04 | 广州冠今电子科技有限公司 | Dimmable LED constant-current drive circuit |
| CN101742783A (en) * | 2010-01-21 | 2010-06-16 | 海洋王照明科技股份有限公司 | High power LED drive circuit with emergency function |
| CN201733500U (en) * | 2010-08-20 | 2011-02-02 | 杭州电子科技大学 | Primary-side constant-current control device of isolation-type flyback LED driver |
| CN201904607U (en) * | 2010-12-23 | 2011-07-20 | 康佳集团股份有限公司 | Overvoltage protection circuit applied to double-flyback topological structure power supply module |
| US20110227492A1 (en) * | 2010-03-16 | 2011-09-22 | Lei Du | Driver systems for driving light emitting diodes and associated driving methods |
-
2012
- 2012-04-26 CN CN201210127212.7A patent/CN103379701B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050269974A1 (en) * | 2005-04-29 | 2005-12-08 | Ravindra Thotakura V | Multi-phase input dimming ballast with flyback converter and method therefor |
| CN101572972A (en) * | 2009-06-04 | 2009-11-04 | 广州冠今电子科技有限公司 | Dimmable LED constant-current drive circuit |
| CN101742783A (en) * | 2010-01-21 | 2010-06-16 | 海洋王照明科技股份有限公司 | High power LED drive circuit with emergency function |
| US20110227492A1 (en) * | 2010-03-16 | 2011-09-22 | Lei Du | Driver systems for driving light emitting diodes and associated driving methods |
| CN201733500U (en) * | 2010-08-20 | 2011-02-02 | 杭州电子科技大学 | Primary-side constant-current control device of isolation-type flyback LED driver |
| CN201904607U (en) * | 2010-12-23 | 2011-07-20 | 康佳集团股份有限公司 | Overvoltage protection circuit applied to double-flyback topological structure power supply module |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104853507A (en) * | 2014-11-26 | 2015-08-19 | 成都冠深科技有限公司 | Bootstrap control LED driving system based on capacitance feedback three-point type oscillation circuit |
| TWI625985B (en) * | 2016-04-27 | 2018-06-01 | Shindengen Electric Manufacturing Co Ltd | LED power supply device and semiconductor integrated circuit |
| CN106455193A (en) * | 2016-08-18 | 2017-02-22 | 惠州市时宇虹光电科技有限公司 | LED driving power supply control circuit with no auxiliary power supply |
| 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 |
| CN106870974A (en) * | 2017-03-01 | 2017-06-20 | 深圳驰迅科技有限公司 | A kind of Multi-function compatible type fluorescent tube |
| CN107135593A (en) * | 2017-06-07 | 2017-09-05 | 深圳市奥金瑞科技有限公司 | Intelligent switch is detected and identification circuit |
| 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 |
| CN115226274A (en) * | 2022-05-11 | 2022-10-21 | 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 |
| 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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| CN103379701B (en) | 2015-12-16 |
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