CN203261508U - Constant-power LED power supply circuit - Google Patents
Constant-power LED power supply circuit Download PDFInfo
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- CN203261508U CN203261508U CN 201320179274 CN201320179274U CN203261508U CN 203261508 U CN203261508 U CN 203261508U CN 201320179274 CN201320179274 CN 201320179274 CN 201320179274 U CN201320179274 U CN 201320179274U CN 203261508 U CN203261508 U CN 203261508U
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Abstract
The utility model discloses a constant-power LED power supply circuit. LED power supplies in the prior art usually employ constant voltage or constant current mode, and need special settings despite the same total power, which causes increased costs and inconvenience. The provided circuit comprises an input power rectifier filter circuit, a switch power supply circuit, a voltage feedback circuit, a current feedback circuit, an analog multiplier circuit, and an LED load. The input power rectifier filter circuit has an input end connected to a 220V voltage, and an output end connected to an input end of the switch power supply circuit. The switch power supply circuit has one output end connected to an input end of the voltage feedback circuit, one output end connected to an input end of the current feedback circuit, and another output end connected to an input end of the LED load. The analog multiplier circuit has one input end connected to an output end of the voltage feedback circuit, another input end connected to an output end of the current feedback circuit, and one output end connected to another input end of the switch power supply circuit. The circuit supplies constant power to different LED loads in either series or parallel connection.
Description
Technical field
The utility model belongs to power technology and lighting field, is specifically related to a kind of permanent power LED power circuit.
Background technology
In energy-saving and emission-reduction cry surging today, the Developing mainstream that the LED illumination will progressively become lighting technology has become common recognition.The LED solid light source Application and Development that is referred to as the revolution of throwing light on has again become one of target of giving priority to this century, and the LED industry of China also enters the stage of accelerated development.The LED driving power is the guarantee of LED industrial chain development, and the quality of LED power supply can affect and restrict the development of LED industry.Research LED driving power is significant to the application of LED industry.For illumination was used for LED, its standard light fixture had unified overall dimension and power, but the series-parallel system of inner LED has multiple variation, and its driving voltage of similar light fixture, the electric current that cause different manufacturers to produce are different.Present LED driving power adopts constant voltage or current constant mode more, although therefore the light fixture gross power is identical, but driving power needs orientation arrangement and can not have just like that preferably versatility as conventional electronic ballast, this has not only raised the cost of LED lighting apparatus, brings a lot of inconvenience also for actual application.
Summary of the invention
The utility model provides a kind of permanent power LED driving power circuit for the deficiencies in the prior art.
The utility model comprises input power current rectifying and wave filtering circuit, switching power circuit, voltage feedback circuit, current feedback circuit, analog multiplier circuit, LED load.The input termination 220V voltage of input power current rectifying and wave filtering circuit, output are connected with an input end signal of switching power circuit, an output of switching power circuit is connected with the input end signal of voltage feedback circuit, another output of switching power circuit is connected with the input end signal of current feedback circuit, and another output of Switching Power Supply is connected with the input end signal of LED load; The output of voltage feedback circuit is connected with an input end signal of analog multiplier circuit, the output of current feedback circuit is connected with another input end signal of analog multiplier circuit, and the output of analog multiplier circuit is connected with another input end signal of switching power circuit.
Described input power current rectifying and wave filtering circuit comprises fuse F, rectifier bridge D, common mode inductance LA, the first inductance L 1, the second inductance L 2, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3; Input interface J1 of the end of fuse F and 220V voltage is connected, and the other end is connected with an end of the first inductance L 1, an end of the first capacitor C 1, the other end of the first capacitor C 1 be connected an end of inductance L 2 and be connected with another input interface of 220V voltage J2; The other end of the first inductance L 1 is connected with the 1st pin of common mode inductance L A, and the other end of the second inductance L 2 is connected with the 2nd pin of common mode inductance L A; Rectifier bridge D is made of four diodes, after being connected with the negative electrode of the second diode D2, the anode of the first diode D1 is connected with the 3rd pin of common mode inductance L A, an end of the second capacitor C 2, be connected with the 4th pin of common mode inductance L A, an end of the 3rd capacitor C 3 after the anode of the 3rd diode D3 is connected with the negative electrode of the 4th diode D4, the other end of the other end of the second capacitor C 2 and the 3rd capacitor C 3 is connected with the interface of the ground wire J3 of 220V voltage; Ground connection behind the anodic bonding of the anode of the second diode D2 and the 4th diode D4, the negative electrode of the first diode D1 are connected rear output as the input power current rectifying and wave filtering circuit with the negative electrode of the 3rd diode D3.
Described switching power circuit comprises electric current pulse width modulator U1, MOSFET manages VT, transformer T, the first winding L a, the second winding L b, tertiary winding Lc, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, the 9th capacitor C 9, the tenth capacitor C 10, the 11 capacitor C 11, the 12 capacitor C 12, the 13 capacitor C 13, the 14 capacitor C 14, the 15 capacitor C 15, the 16 capacitor C 16, the 17 capacitor C 17, the 18 capacitor C 18, the 19 capacitor C 19, the 20 capacitor C 20, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the 9th diode D9, light-emitting diode D10, the 3rd inductance L 3, the 4th inductance L 4; One end of the 1st pin of electric current pulse width modulator U1 and the 4th capacitor C 4, one end of the first resistance R 1 connects a rear feedback input end V1 as switching power circuit, the 2nd pin is connected with an end of the second resistance R 2, the other end of the 9th pin and the first resistance R 1, one end of the 3rd resistance R 3, one end of the 5th capacitor C 5 connects, the 7th pin is connected with an end of the 4th resistance R 4, the other end of the 5th pin and the 4th resistance R 4, one end of the 6th capacitor C 6 connects, the 6th pin is connected with an end of the 5th resistance R 5, the 8th pin is connected with the positive pole of the 7th capacitor C 7, the 13rd pin and the 15th pin, one end of the 6th resistance R 6, the positive pole of the 8th capacitor C 8, one end of the 3rd inductance L 3 meets power supply VCC after connecting, the other end of the 16th pin and the second resistance R 2, one end of the 9th capacitor C 9 connects, the 11st pin is connected with an end of the 7th resistance R 7, one end of the 10th pin and the tenth capacitor C 10, one end of the 8th resistance R 8 connects, one end of the 12nd pin and the 9th resistance R 9, the other end of the tenth capacitor C 10, the negative pole of the 8th capacitor C 8, the other end of the 9th capacitor C 9, the negative pole of the 7th capacitor C 7, the other end of the 5th resistance R 5, the other end of the 6th capacitor C 6, the other end of the 5th capacitor C 5, ground connection after one end of the 11 capacitor C 11 connects, other pins are all built on stilts; The other end of the 3rd inductance L 3 is connected with the negative electrode of the 5th diode D5, an end of the 12 capacitor C 12; Transformer is made of three windings, the end of the first winding La and the anode of the 6th diode D6, one end of the tenth resistance R 10, one end of the 13 capacitor C 13, the other end of the 6th resistance R 6, the other end of the 11 capacitor C 11 is connected with the output of input power current rectifying and wave filtering circuit after connecting, the anode of the other end of the first winding La and the 7th diode D7, the drain electrode of MOSFET pipe VT connects, the end of the second winding Lb and the anodic bonding of the 8th diode D8, the other end of the second winding Lb and the negative pole of the 14 capacitor C 14, one end of the 15 capacitor C 15, the negative pole of the 16 capacitor C 16, the negative pole of the 17 capacitor C 17, one end of the 18 capacitor C 18, an output interface J4 as switching power circuit after one end of the 19 capacitor C 19 connects connects, the end of the 3rd winding Lc and the anodic bonding of the 9th diode D9, the other end of the 3rd winding Lc and the negative pole of the 20 capacitor C 20, the other end of the 12 capacitor C 12, the other end of the 19 capacitor C 19, ground connection after the negative electrode of light-emitting diode D10 connects; The grid of MOSFET pipe VT is connected with the other end of the 7th resistance R 7, and source electrode is connected rear the first output V2 as switching power circuit with the other end of the 8th resistance R 8, the other end of the 9th resistance R 9; The negative electrode of the 8th diode D8 is connected with an end of the positive pole of the 14 capacitor C 14, the 15 capacitor C 15, the positive pole of the 16 capacitor C 16, an end of the 4th inductance L 4; An output interface J5 as switching power circuit after the other end of the 4th inductance L 4 is connected with the other end of the positive pole of the 17 capacitor C 17, the 18 capacitor C 18 connects; The negative electrode of the 9th diode D9 is connected rear the second output V3 as switching power circuit with the anode of the positive pole of the 20 capacitor C 20, the 5th diode D5, an end of the 11 resistance R 11; The anodic bonding of the other end of the 11 resistance R 11 and light-emitting diode D10.The model of described electric current pulse width modulator U1 is SG3525A.
Two output interface J4 of described switching power circuit are connected with the input interface of LED load with J5.Described LED load is existing LED lighting device.
Described voltage feedback circuit comprises the 12 resistance R 12, the 13 resistance R 13, slip variable resistance Rx; One end of the 12 resistance R 12 is connected with the end of slip variable resistance Rx, other end ground connection, the other end of slip variable resistance Rx is connected with an end of the 13 resistance R 13, sliding end is as the output of voltage feedback circuit, and the other end of the 13 resistance R 13 is connected with the second output V3 of switching power circuit.
Described current feedback circuit comprises amplifier U2, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 18 resistance R 18, the 19 resistance R 19, the 20 resistance R 20, the 21 capacitor C 21, the 22 capacitor C 22, the 23 capacitor C 23, the 5th inductance L 5; The 1st pin of amplifier U2 and an end of the 14 resistance R 14, one end of the 15 resistance R 15, one end of the 21 capacitor C 21 connects, the 2nd pin is connected with an end of the 16 resistance R 16, the other end of the 3rd pin and the 15 resistance R 15, the other end of the 21 capacitor C 21, one end of the 17 resistance R 17 connects, the 4th pin ground connection, the 5th pin is connected with the other end of the 14 resistance R 14, one end of the 6th pin and the 18 resistance R 18, one end of the 19 resistance R 19, one end of the 22 capacitor C 22 connects, the other end of the 7th pin and the 18 resistance R 18, as the output of current feedback circuit, the 8th pin was connected with power supply VCC after the other end of the 22 capacitor C 22 connected; The other end of the 16 resistance R 16 is connected with an end of the 20 resistance R 20, an end of the 23 capacitor C 23, an end of the 5th inductance L 5; Ground connection after the other end of the 20 resistance R 20 is connected with the other end of the 23 capacitor C 23; The equal ground connection of the other end of the other end of the 19 resistance R 19, the 17 resistance R 17; The other end of the 5th inductance L 5 is connected with the first output V2 of switching power circuit.The model of described amplifier U2 is LM358.
Described analog multiplier circuit comprises analog multiplier U3, the 21 resistance R 21, the 22 resistance R 22, the 23 resistance R 23; The 1st pin of analog multiplier U3 is connected with the output of current feedback circuit, ground connection after the 2nd pin is connected with an end of the 4th pin, the 5th pin, the 21 resistance R 21, the 3rd pin is connected with the output of voltage feedback circuit, the 6th pin is connected with the other end of the 21 resistance R 21, an end of the 22 resistance R 22, an end of the 23 resistance R 23, the 7th pin is connected with the other end of the 23 resistance R 23, and the 8th pin is connected with power supply VCC; The other end of the 22 resistance R 22 is connected with a feedback input end V1 of switching power circuit.The model of described analog multiplier U3 is AD633.
The utility model beneficial effect is: the power supply that can realize the LED load group of the different connections of connection in series-parallel under the permanent power situation by the utility model can both permanent power.The utility model has changed under traditional different connected modes, and the limitation that power supply can not be general is conducive to the unified standard configuration of LED load group, simplifies the outfit of LED load group power supply, effectively promotes the extensive use of LED load group.
Description of drawings
Fig. 1 is that system of the present utility model consists of schematic diagram;
Fig. 2 is the circuit diagram of input power current rectifying and wave filtering circuit;
Fig. 3 is the circuit diagram of Switching Power Supply;
Fig. 4 is the circuit diagram of voltage feedback circuit;
Fig. 5 is the circuit diagram of current feedback circuit;
Fig. 6 is the circuit diagram of analog multiplier circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to analyze.
As shown in Figure 1, the utility model comprises input power current rectifying and wave filtering circuit 1, switching power circuit 2, voltage feedback circuit 3, current feedback circuit 4, analog multiplier circuit 5, LED load 6.The input termination 220V voltage of input power current rectifying and wave filtering circuit 1, output are connected with an input end signal of switching power circuit 2, an output of switching power circuit 2 is connected with the input end signal of voltage feedback circuit 3, another output of switching power circuit 2 is connected with the input end signal of current feedback circuit 4, and another output of Switching Power Supply is connected with the input end signal of LED load 6; The output of voltage feedback circuit 3 is connected with an input end signal of analog multiplier circuit 5, the output of current feedback circuit 4 is connected with another input end signal of analog multiplier circuit 5, and the output of analog multiplier circuit 5 is connected with another input end signal of switching power circuit 2.
As shown in Figure 2, input power current rectifying and wave filtering circuit 1 comprises fuse F, rectifier bridge D, common mode inductance LA, the first inductance L 1, the second inductance L 2, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3; Input interface J1 of the end of fuse F and 220V voltage is connected, and the other end is connected with an end of the first inductance L 1, an end of the first capacitor C 1, the other end of the first capacitor C 1 be connected an end of inductance L 2 and be connected with another input interface of 220V voltage J2; The other end of the first inductance L 1 is connected with the 1st pin of common mode inductance L A, and the other end of the second inductance L 2 is connected with the 2nd pin of common mode inductance L A; Rectifier bridge D is made of four diodes, after being connected with the negative electrode of the second diode D2, the anode of the first diode D1 is connected with the 3rd pin of common mode inductance L A, an end of the second capacitor C 2, be connected with the 4th pin of common mode inductance L A, an end of the 3rd capacitor C 3 after the anode of the 3rd diode D3 is connected with the negative electrode of the 4th diode D4, the other end of the other end of the second capacitor C 2 and the 3rd capacitor C 3 is connected with the interface of the ground wire J3 of 220V voltage; Ground connection behind the anodic bonding of the anode of the second diode D2 and the 4th diode D4, the negative electrode of the first diode D1 are connected rear output as input power current rectifying and wave filtering circuit 1 with the negative electrode of the 3rd diode D3.
As shown in Figure 3, switching power circuit 2 comprises electric current pulse width modulator U1, MOSFET manages VT, transformer T, the first winding L a, the second winding L b, tertiary winding Lc, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, the 9th capacitor C 9, the tenth capacitor C 10, the 11 capacitor C 11, the 12 capacitor C 12, the 13 capacitor C 13, the 14 capacitor C 14, the 15 capacitor C 15, the 16 capacitor C 16, the 17 capacitor C 17, the 18 capacitor C 18, the 19 capacitor C 19, the 20 capacitor C 20, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the 9th diode D9, light-emitting diode D10, the 3rd inductance L 3, the 4th inductance L 4; One end of the 1st pin of electric current pulse width modulator U1 and the 4th capacitor C 4, one end of the first resistance R 1 connects a rear output V1 as switching power circuit 2, the 2nd pin is connected with an end of the second resistance R 2, the other end of the 9th pin and the first resistance R 1, one end of the 3rd resistance R 3, one end of the 5th capacitor C 5 connects, the 7th pin is connected with an end of the 4th resistance R 4, the other end of the 5th pin and the 4th resistance R 4, one end of the 6th capacitor C 6 connects, the 6th pin is connected with an end of the 5th resistance R 5, the 8th pin is connected with the positive pole of the 7th capacitor C 7, the 13rd pin and the 15th pin, one end of the 6th resistance R 6, the positive pole of the 8th capacitor C 8, one end of the 3rd inductance L 3 meets power supply VCC after connecting, the other end of the 16th pin and the second resistance R 2, one end of the 9th capacitor C 9 connects, the 11st pin is connected with an end of the 7th resistance R 7, one end of the 10th pin and the tenth capacitor C 10, one end of the 8th resistance R 8 connects, one end of the 12nd pin and the 9th resistance R 9, the other end of the tenth capacitor C 10, the negative pole of the 8th capacitor C 8, the other end of the 9th capacitor C 9, the negative pole of the 7th capacitor C 7, the other end of the 5th resistance R 5, the other end of the 6th capacitor C 6, the other end of the 5th capacitor C 5, ground connection after one end of the 11 capacitor C 11 connects, other pins are all built on stilts; The other end of the 3rd inductance L 3 is connected with the negative electrode of the 5th diode D5, an end of the 12 capacitor C 12; Transformer is made of three windings, the end of the first winding La and the anode of the 6th diode D6, one end of the tenth resistance R 10, one end of the 13 capacitor C 13, the other end of the 6th resistance R 6, the other end of the 11 capacitor C 11 is connected with the output of input power current rectifying and wave filtering circuit 1 after connecting, the anode of the other end of the first winding La and the 7th diode D7, the drain electrode of MOSFET pipe VT connects, the end of the second winding Lb and the anodic bonding of the 8th diode D8, the other end of the second winding Lb and the negative pole of the 14 capacitor C 14, one end of the 15 capacitor C 15, the negative pole of the 16 capacitor C 16, the negative pole of the 17 capacitor C 17, one end of the 18 capacitor C 18, an output interface J4 as switching power circuit 2 after one end of the 19 capacitor C 19 connects connects, the end of the 3rd winding Lc and the anodic bonding of the 9th diode D9, the other end of the 3rd winding Lc and the negative pole of the 20 capacitor C 20, the other end of the 12 capacitor C 12, the other end of the 19 capacitor C 19, ground connection after the negative electrode of light-emitting diode D10 connects; The grid of MOSFET pipe VT is connected with the other end of the 7th resistance R 7, and source electrode is connected rear the first output V2 as switching power circuit 2 with the other end of the 8th resistance R 8, the other end of the 9th resistance R 9; The negative electrode of the 8th diode D8 is connected with an end of the positive pole of the 14 capacitor C 14, the 15 capacitor C 15, the positive pole of the 16 capacitor C 16, an end of the 4th inductance L 4; An output interface J5 as switching power circuit 2 after the other end of the 4th inductance L 4 is connected with the other end of the positive pole of the 17 capacitor C 17, the 18 capacitor C 18 connects; The negative electrode of the 9th diode D9 is connected rear the second output V3 as switching power circuit 2 with the anode of the positive pole of the 20 capacitor C 20, the 5th diode D5, an end of the 11 resistance R 11; The anodic bonding of the other end of the 11 resistance R 11 and light-emitting diode D10.The model of described electric current pulse width modulator U1 is SG3525A.
Two output interface J4 of switching power circuit 2 are connected with the input interface of LED load 6 with J5.Described LED load 6 is existing LED lighting device.
As shown in Figure 4, voltage feedback circuit 3 comprises the 12 resistance R 12, the 13 resistance R 13, slip variable resistance Rx; One end of the 12 resistance R 12 is connected with the end of slip variable resistance Rx, other end ground connection, the other end of slip variable resistance Rx is connected with an end of the 13 resistance R 13, sliding end is as the output of voltage feedback circuit 3, and the other end of the 13 resistance R 13 is connected with the second output V3 of switching power circuit 2.
As shown in Figure 5, current feedback circuit 4 comprises amplifier U2, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 18 resistance R 18, the 19 resistance R 19, the 20 resistance R 20, the 21 capacitor C 21, the 22 capacitor C 22, the 23 capacitor C 23, the 5th inductance L 5; The 1st pin of amplifier U2 and an end of the 14 resistance R 14, one end of the 15 resistance R 15, one end of the 21 capacitor C 21 connects, the 2nd pin is connected with an end of the 16 resistance R 16, the other end of the 3rd pin and the 15 resistance R 15, the other end of the 21 capacitor C 21, one end of the 17 resistance R 17 connects, the 4th pin ground connection, the 5th pin is connected with the other end of the 14 resistance R 14, one end of the 6th pin and the 18 resistance R 18, one end of the 19 resistance R 19, one end of the 22 capacitor C 22 connects, the other end of the 7th pin and the 18 resistance R 18, as the output of current feedback circuit 4, the 8th pin was connected with power supply VCC after the other end of the 22 capacitor C 22 connected; The other end of the 16 resistance R 16 is connected with an end of the 20 resistance R 20, an end of the 23 capacitor C 23, an end of the 5th inductance L 5; Ground connection after the other end of the 20 resistance R 20 is connected with the other end of the 23 capacitor C 23; The equal ground connection of the other end of the other end of the 19 resistance R 19, the 17 resistance R 17; The other end of the 5th inductance L 5 is connected with the first output V2 of switching power circuit 2.The model of described amplifier U2 is LM358.
As shown in Figure 6, analog multiplier circuit 5 comprises analog multiplier U3, the 21 resistance R 21, the 22 resistance R 22, the 23 resistance R 23; The 1st pin of analog multiplier U3 is connected with the output of current feedback circuit 4, ground connection after the 2nd pin is connected with an end of the 4th pin, the 5th pin, the 21 resistance R 21, the 3rd pin is connected with the output of voltage feedback circuit 3, the 6th pin is connected with the other end of the 21 resistance R 21, an end of the 22 resistance R 22, an end of the 23 resistance R 23, the 7th pin is connected with the other end of the 23 resistance R 23, and the 8th pin is connected with power supply VCC; The other end of the 22 resistance R 22 is connected with an output V1 of switching power circuit 2.
The model of described analog multiplier U3 is AD633.
The course of work:
The 220V input power provides power supply through filtering, rectification to switching power circuit 2 in the input power current rectifying and wave filtering circuit 1.What switching power circuit 2 adopted is the form of inverse-excitation type, and the DC power supply of stable output is to LED load 6 power supplies.The principle of switching power circuit 2 constant power output voltages is: utilize feedback principle, voltage signal and the current signal of transformer T output are sampled by voltage feedback circuit 3 and current feedback circuit 4 respectively, and the power that obtains feeding back through analog multiplier U3, the error amplifier of electric current pulse width modulator U1 in the switching power circuit 2 is regulated according to the power signal of feedback again, thereby the power supply of output constant power is to LED load 6 power supplies.
Above-described embodiment is not to be that the utility model is not limited only to above-described embodiment for restriction of the present utility model, as long as meet the utility model requirement, all belongs to protection range of the present utility model.
Claims (1)
1. a permanent power LED power circuit is characterized in that comprising input power current rectifying and wave filtering circuit, switching power circuit, voltage feedback circuit, current feedback circuit, analog multiplier circuit, LED load; The input termination 220V voltage of input power current rectifying and wave filtering circuit, output are connected with an input end signal of switching power circuit, an output of switching power circuit is connected with the input end signal of voltage feedback circuit, another output of switching power circuit is connected with the input end signal of current feedback circuit, and another output of Switching Power Supply is connected with the input end signal of LED load; The output of voltage feedback circuit is connected with an input end signal of analog multiplier circuit, the output of current feedback circuit is connected with another input end signal of analog multiplier circuit, and the output of analog multiplier circuit is connected with another input end signal of switching power circuit;
Described input power current rectifying and wave filtering circuit comprises fuse F, rectifier bridge D, common mode inductance LA, the first inductance L 1, the second inductance L 2, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3; Input interface J1 of the end of fuse F and 220V voltage is connected, and the other end is connected with an end of the first inductance L 1, an end of the first capacitor C 1, the other end of the first capacitor C 1 be connected an end of inductance L 2 and be connected with another input interface of 220V voltage J2; The other end of the first inductance L 1 is connected with the 1st pin of common mode inductance L A, and the other end of the second inductance L 2 is connected with the 2nd pin of common mode inductance L A; Rectifier bridge D is made of four diodes, after being connected with the negative electrode of the second diode D2, the anode of the first diode D1 is connected with the 3rd pin of common mode inductance L A, an end of the second capacitor C 2, be connected with the 4th pin of common mode inductance L A, an end of the 3rd capacitor C 3 after the anode of the 3rd diode D3 is connected with the negative electrode of the 4th diode D4, the other end of the other end of the second capacitor C 2 and the 3rd capacitor C 3 is connected with the interface of the ground wire J3 of 220V voltage; Ground connection behind the anodic bonding of the anode of the second diode D2 and the 4th diode D4, the negative electrode of the first diode D1 are connected rear output as the input power current rectifying and wave filtering circuit with the negative electrode of the 3rd diode D3;
Described switching power circuit comprises electric current pulse width modulator U1, MOSFET manages VT, transformer T, the first winding L a, the second winding L b, tertiary winding Lc, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, the 9th capacitor C 9, the tenth capacitor C 10, the 11 capacitor C 11, the 12 capacitor C 12, the 13 capacitor C 13, the 14 capacitor C 14, the 15 capacitor C 15, the 16 capacitor C 16, the 17 capacitor C 17, the 18 capacitor C 18, the 19 capacitor C 19, the 20 capacitor C 20, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the 9th diode D9, light-emitting diode D10, the 3rd inductance L 3, the 4th inductance L 4; One end of the 1st pin of electric current pulse width modulator U1 and the 4th capacitor C 4, one end of the first resistance R 1 connects a rear feedback input end V1 as switching power circuit, the 2nd pin is connected with an end of the second resistance R 2, the other end of the 9th pin and the first resistance R 1, one end of the 3rd resistance R 3, one end of the 5th capacitor C 5 connects, the 7th pin is connected with an end of the 4th resistance R 4, the other end of the 5th pin and the 4th resistance R 4, one end of the 6th capacitor C 6 connects, the 6th pin is connected with an end of the 5th resistance R 5, the 8th pin is connected with the positive pole of the 7th capacitor C 7, the 13rd pin and the 15th pin, one end of the 6th resistance R 6, the positive pole of the 8th capacitor C 8, one end of the 3rd inductance L 3 meets power supply VCC after connecting, the other end of the 16th pin and the second resistance R 2, one end of the 9th capacitor C 9 connects, the 11st pin is connected with an end of the 7th resistance R 7, one end of the 10th pin and the tenth capacitor C 10, one end of the 8th resistance R 8 connects, one end of the 12nd pin and the 9th resistance R 9, the other end of the tenth capacitor C 10, the negative pole of the 8th capacitor C 8, the other end of the 9th capacitor C 9, the negative pole of the 7th capacitor C 7, the other end of the 5th resistance R 5, the other end of the 6th capacitor C 6, the other end of the 5th capacitor C 5, ground connection after one end of the 11 capacitor C 11 connects, other pins are all built on stilts; The other end of the 3rd inductance L 3 is connected with the negative electrode of the 5th diode D5, an end of the 12 capacitor C 12; Transformer is made of three windings, the end of the first winding La and the anode of the 6th diode D6, one end of the tenth resistance R 10, one end of the 13 capacitor C 13, the other end of the 6th resistance R 6, the other end of the 11 capacitor C 11 is connected with the output of input power current rectifying and wave filtering circuit after connecting, the anode of the other end of the first winding La and the 7th diode D7, the drain electrode of MOSFET pipe VT connects, the end of the second winding Lb and the anodic bonding of the 8th diode D8, the other end of the second winding Lb and the negative pole of the 14 capacitor C 14, one end of the 15 capacitor C 15, the negative pole of the 16 capacitor C 16, the negative pole of the 17 capacitor C 17, one end of the 18 capacitor C 18, an output interface J4 as switching power circuit after one end of the 19 capacitor C 19 connects connects, the end of the 3rd winding Lc and the anodic bonding of the 9th diode D9, the other end of the 3rd winding Lc and the negative pole of the 20 capacitor C 20, the other end of the 12 capacitor C 12, the other end of the 19 capacitor C 19, ground connection after the negative electrode of light-emitting diode D10 connects; The grid of MOSFET pipe VT is connected with the other end of the 7th resistance R 7, and source electrode is connected rear the first output V2 as switching power circuit with the other end of the 8th resistance R 8, the other end of the 9th resistance R 9; The negative electrode of the 8th diode D8 is connected with an end of the positive pole of the 14 capacitor C 14, the 15 capacitor C 15, the positive pole of the 16 capacitor C 16, an end of the 4th inductance L 4; An output interface J5 as switching power circuit after the other end of the 4th inductance L 4 is connected with the other end of the positive pole of the 17 capacitor C 17, the 18 capacitor C 18 connects; The negative electrode of the 9th diode D9 is connected rear the second output V3 as switching power circuit with the anode of the positive pole of the 20 capacitor C 20, the 5th diode D5, an end of the 11 resistance R 11; The anodic bonding of the other end of the 11 resistance R 11 and light-emitting diode D10; The model of described electric current pulse width modulator U1 is SG3525A;
Two output interface J4 of described switching power circuit are connected with the input interface of LED load with J5;
Described voltage feedback circuit comprises the 12 resistance R 12, the 13 resistance R 13, slip variable resistance Rx; One end of the 12 resistance R 12 is connected with the end of slip variable resistance Rx, other end ground connection, the other end of slip variable resistance Rx is connected with an end of the 13 resistance R 13, sliding end is as the output of voltage feedback circuit, and the other end of the 13 resistance R 13 is connected with the second output V3 of switching power circuit;
Described current feedback circuit comprises amplifier U2, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 18 resistance R 18, the 19 resistance R 19, the 20 resistance R 20, the 21 capacitor C 21, the 22 capacitor C 22, the 23 capacitor C 23, the 5th inductance L 5; The 1st pin of amplifier U2 and an end of the 14 resistance R 14, one end of the 15 resistance R 15, one end of the 21 capacitor C 21 connects, the 2nd pin is connected with an end of the 16 resistance R 16, the other end of the 3rd pin and the 15 resistance R 15, the other end of the 21 capacitor C 21, one end of the 17 resistance R 17 connects, the 4th pin ground connection, the 5th pin is connected with the other end of the 14 resistance R 14, one end of the 6th pin and the 18 resistance R 18, one end of the 19 resistance R 19, one end of the 22 capacitor C 22 connects, the other end of the 7th pin and the 18 resistance R 18, as the output of current feedback circuit, the 8th pin was connected with power supply VCC after the other end of the 22 capacitor C 22 connected; The other end of the 16 resistance R 16 is connected with an end of the 20 resistance R 20, an end of the 23 capacitor C 23, an end of the 5th inductance L 5; Ground connection after the other end of the 20 resistance R 20 is connected with the other end of the 23 capacitor C 23; The equal ground connection of the other end of the other end of the 19 resistance R 19, the 17 resistance R 17; The other end of the 5th inductance L 5 is connected with the first output V2 of switching power circuit; The model of described amplifier U2 is LM358;
Described analog multiplier circuit comprises analog multiplier U3, the 21 resistance R 21, the 22 resistance R 22, the 23 resistance R 23; The 1st pin of analog multiplier U3 is connected with the output of current feedback circuit, ground connection after the 2nd pin is connected with an end of the 4th pin, the 5th pin, the 21 resistance R 21, the 3rd pin is connected with the output of voltage feedback circuit, the 6th pin is connected with the other end of the 21 resistance R 21, an end of the 22 resistance R 22, an end of the 23 resistance R 23, the 7th pin is connected with the other end of the 23 resistance R 23, and the 8th pin is connected with power supply VCC; The other end of the 22 resistance R 22 is connected with a feedback input end V1 of switching power circuit; The model of described analog multiplier U3 is AD633.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017099991A1 (en) * | 2015-12-08 | 2017-06-15 | Cooper Technologies Company | Constant power supply for thermo-electric cells |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017099991A1 (en) * | 2015-12-08 | 2017-06-15 | Cooper Technologies Company | Constant power supply for thermo-electric cells |
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Granted publication date: 20131030 Termination date: 20140410 |