CN103220856A - Self-adapting light emitting diode (LED) driving power circuit - Google Patents
Self-adapting light emitting diode (LED) driving power circuit Download PDFInfo
- Publication number
- CN103220856A CN103220856A CN2013101236159A CN201310123615A CN103220856A CN 103220856 A CN103220856 A CN 103220856A CN 2013101236159 A CN2013101236159 A CN 2013101236159A CN 201310123615 A CN201310123615 A CN 201310123615A CN 103220856 A CN103220856 A CN 103220856A
- Authority
- CN
- China
- Prior art keywords
- resistance
- capacitor
- circuit
- diode
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a self-adapting light emitting diode (LED) driving power circuit. A constant-voltage mode or a constant-current mode is adopted by most LED power supplies at present, even though total power is the same, directional configuration is needed, cost is increased and using is not convenient. The self-adapting LED driving power circuit comprises a switch power circuit, an input power supply rectification and filtering circuit, a voltage feedback circuit, a current feedback circuit and an analog multiplier circuit, wherein an input end of the input power supply rectification and filtering circuit is connected with 220V voltage, an output end of the input power supply rectification and filtering circuit is connected with one input end of the switch power circuit, one output end of the switch power circuit is connected with an input end of the voltage feedback circuit, the other output end of the switch power circuit is connected with an input end of the current feedback circuit, an output end of the voltage feedback circuit is connected with one input end of the analog multiplier circuit, an output end of the current feedback circuit is connected with the other input end of the analog multiplier circuit, and an output end of the analog multiplier circuit is connected with the other input end of the switch power circuit. The self-adapting LED driving power circuit has the advantages that the power supply constant power of different LED loads connected in series or in parallel and under the condition of constant power is achieved.
Description
Technical field
The invention belongs to power technology and lighting field, be specifically related to a kind of adaptive LED driving power circuit.
Background technology
In energy-saving and emission-reduction cry surging today, the development main flow 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 influence 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, causes its driving voltage of similar light fixture, the electric current of different manufacturers production to have nothing in common with each other.Present LED driving power adopts constant voltage or current constant mode more, though therefore the light fixture gross power is identical, but driving power needs orientation arrangement and can not have good versatility just like that 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 present invention is directed to the deficiencies in the prior art, a kind of adaptive LED driving power circuit is provided.
The present invention includes switching power circuit, input power supply rectification filter circuit, voltage feedback circuit, current feedback circuit, analog multiplier circuit.The input termination 220V voltage of input power supply rectification filter circuit, output is 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, 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 supply rectification filter circuit comprises fuse F, rectifier bridge D, common mode inductance LA, first inductance L 1, second inductance L 2, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4; Input interface J1 of the end of fuse F and 220V voltage is connected, and the other end is connected with an end of first inductance L 1, an end of first capacitor C 1, and an end of the other end of first capacitor C 1 and second inductance L 2 is connected with another input interface of 220V voltage J2; The other end of first inductance L 1 is connected with the 1st pin of common mode inductance L A, and the other end of second inductance L 2 is connected with the 2nd pin of common mode inductance L A; Rectifier bridge D is made of four diodes, the anode of the first diode D1 is connected the back and is connected with the 3rd pin of common mode inductance L A, an end of second capacitor C 2 with the negative electrode of the second diode D2, the anode of the 3rd diode D3 is connected the back and is connected with the 4th pin of common mode inductance L A, an end of the 3rd capacitor C 3 with the negative electrode of the 4th diode D4, the other end of the other end of second capacitor C 2 and the 3rd capacitor C 3 is connected with the interface of the ground wire J3 of 220V voltage; The anode of the second diode D2 is connected back ground connection with the anode of the 4th diode D4, the negative electrode of the first diode D1 is connected the output of back as the input power supply rectification filter 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, first resistance R 1, 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 voltage error adjuster inverting input of electric current pulse width modulator U1 and the 4th capacitor C 4, one end of first resistance R 1 connects the feedback input end V1 of back as switching power circuit, voltage error adjuster normal phase input end is connected with an end of second resistance R 2, the other end of the voltage error conditioner outlet end and first resistance R 1, one end of the 3rd resistance R 3, one end of the 5th capacitor C 5 connects, the capacitor discharge control end is connected with an end of the 4th resistance R 4, the other end of oscillating capacitance end and the 4th resistance R 4, one end of the 6th capacitor C 6 connects, the oscillation resistance end is connected with an end of the 5th resistance R 5, the soft start end is connected with the positive pole of the 7th capacitor C 7, drive circuitry power end and input supply terminal, 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 reference voltage end and second resistance R 2, one end of the 9th capacitor C 9 connects, PWM modulation output is connected with an end of the 7th resistance R 7, an end of input and the tenth capacitor C 10 is compared in pulse blocking, one end of the 8th resistance R 8 connects, one end of earth terminal 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, one end of the 11 capacitor C 11 connects back ground connection, and 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 connects the back and is connected with the output of input power supply rectification filter circuit, 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 is connected with the anode 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, one end of the 19 capacitor C 19 connects the output interface J4 of back as switching power circuit, the end of the 3rd winding Lc is connected with the anode 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, the negative electrode of light-emitting diode D10 connects back ground connection; The grid of MOSFET pipe VT is connected with the other end of the 7th resistance R 7, and source electrode is connected the output V2 of back 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; The other end of the 4th inductance L 4 is connected another output interface J5 of back as switching power circuit with the other end of the positive pole of the 17 capacitor C 17, the 18 capacitor C 18; The negative electrode of the 9th diode D9 is connected another output V3 of back 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 other end of the 11 resistance R 11 is connected with the anode of light-emitting diode D10.
Described electric current pulse width modulator U1 is the novel analog numerical value mixing integrated chip that can realize the feedback regulation of current sampling signal, and this chip adopts and recommends output, can only connect the driven MOS pipe, has functions such as under-voltage locking, overvoltage protection and soft start.
Described voltage feedback circuit comprises the 12 resistance R the 12, the 13 resistance R 13, sliding becomes resistance Rx; One end of the 12 resistance R 12 is connected with the end of the change resistance Rx that slides, other end ground connection, the other end that slide to become 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 another output V3 of switching power circuit.
Described current feedback circuit comprises amplifier U2, the 14 resistance R the 14, the 15 resistance R the 15, the 16 resistance R the 16, the 17 resistance R the 17, the 18 resistance R the 18, the 19 resistance R the 19, the 20 resistance R the 20, the 21 capacitor C the 21, the 22 capacitor C the 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, the other end of the 22 capacitor C 22 connects the output of back as current feedback circuit, and the 8th pin is connected with power supply VCC; 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; The other end of the 20 resistance R 20 is connected back ground connection 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 an output V2 of switching power circuit.
Described analog multiplier circuit comprises analog multiplier U3, the 21 resistance R the 21, the 22 resistance R the 22, the 23 resistance R 23; The 1st pin of analog multiplier U3 is connected with the output of current feedback circuit, the 2nd pin is connected back ground connection 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 voltage signal and the current signal of described switching power circuit output are sampled by voltage feedback circuit and current feedback circuit respectively, and obtain power feedback signal behind the process analog multiplier circuit, the control pulse width modulator is regulated pulsewidth, thereby realizes output constant power at two output interface J4, J5 of switching power circuit.
Beneficial effect of the present invention is: the power supply that can realize the LED load group of the different connection situations of connection in series-parallel under the permanent power situation by the present invention can both permanent power.The present invention has changed under traditional different connected modes, and the limitation that power supply can not be general helps 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 invention constitutes schematic diagram;
Fig. 2 is the circuit diagram of input power supply rectification filter circuit;
Fig. 3 is the circuit diagram of Switching Power Supply;
The circuit diagram of Fig. 4 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 present invention is done further analysis.
As shown in Figure 1, the present invention includes input power supply rectification filter circuit 1, switching power circuit 2, voltage feedback circuit 3, current feedback circuit 4, analog multiplier circuit 5.Input termination 220V voltage, the output of input power supply rectification filter circuit 1 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, and another output of switching power circuit 2 is connected with the input end signal of current feedback circuit 4; 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 supply rectification filter circuit 1 comprises fuse F, rectifier bridge D, common mode inductance LA, first inductance L 1, second inductance L 2, first capacitor C 1, 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 first inductance L 1, an end of first capacitor C 1, and an end of the other end of first capacitor C 1 and second inductance L 2 is connected with another input interface of 220V voltage J2; The other end of first inductance L 1 is connected with the 1st pin of common mode inductance L A, and the other end of second inductance L 2 is connected with the 2nd pin of common mode inductance L A; Rectifier bridge D is made of four diodes, the anode of the first diode D1 is connected the back and is connected with the 3rd pin of common mode inductance L A, an end of second capacitor C 2 with the negative electrode of the second diode D2, the anode of the 3rd diode D3 is connected the back and is connected with the 4th pin of common mode inductance L A, an end of the 3rd capacitor C 3 with the negative electrode of the 4th diode D4, the other end of the other end of second capacitor C 2 and the 3rd capacitor C 3 is connected with the interface of the ground wire J3 of 220V voltage; The anode of the second diode D2 is connected back ground connection with the anode of the 4th diode D4, the negative electrode of the first diode D1 is connected the output of back as input power supply rectification filter 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, first resistance R 1, 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 first resistance R 1 connects the feedback input end V1 of back as switching power circuit 2, the 2nd pin is connected with an end of second resistance R 2, the other end of the 9th pin and 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 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, one end of the 11 capacitor C 11 connects back ground connection, and 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 connects the back and is connected with the output of input power supply rectification filter circuit 1, 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 is connected with the anode 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, one end of the 19 capacitor C 19 connects the output interface J4 connection of back as switching power circuit 2, the end of the 3rd winding Lc is connected with the anode 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, the negative electrode of light-emitting diode D10 connects back ground connection; The grid of MOSFET pipe VT is connected with the other end of the 7th resistance R 7, and source electrode is connected the output V2 of back 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; The other end of the 4th inductance L 4 is connected the output interface J5 connection of back as switching power circuit 2 with the other end of the positive pole of the 17 capacitor C 17, the 18 capacitor C 18; The negative electrode of the 9th diode D9 is connected another output V3 of back 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 other end of the 11 resistance R 11 is connected with the anode of 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 with J5.Described LED load is existing LED lighting device.
As shown in Figure 4, voltage feedback circuit 3 comprises the 12 resistance R the 12, the 13 resistance R 13, sliding becomes resistance Rx; One end of the 12 resistance R 12 is connected with the end of the change resistance Rx that slides, other end ground connection, the other end that slide to become 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 another output V3 of switching power circuit 2.
As shown in Figure 5, current feedback circuit 4 comprises amplifier U2, the 14 resistance R the 14, the 15 resistance R the 15, the 16 resistance R the 16, the 17 resistance R the 17, the 18 resistance R the 18, the 19 resistance R the 19, the 20 resistance R the 20, the 21 capacitor C the 21, the 22 capacitor C the 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, the other end of the 22 capacitor C 22 connects the output of back as current feedback circuit 4, and the 8th pin is connected with power supply VCC; 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; The other end of the 20 resistance R 20 is connected back ground connection 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 an 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 the 21, the 22 resistance R the 22, the 23 resistance R 23; The 1st pin of analog multiplier U3 is connected with the output of current feedback circuit 4, the 2nd pin is connected back ground connection 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 a feedback input end V1 of switching power circuit 2.
The model of described analog multiplier U3 is AD633.
The course of work:
220V input power supply provides power supply for switching power circuit 2 through filtering, rectification in the input power supply rectification filter circuit 1.What switching power circuit 2 adopted is the form of inverse-excitation type, and the LED electric is given in output galvanic current source.The principle of switching power circuit 2 permanent power output voltages is: utilize feedback principle, the 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 given the LED electric.
The foregoing description is not to be that the present invention is not limited only to the foregoing description for restriction of the present invention, as long as meet requirement of the present invention, all belongs to protection scope of the present invention.
Claims (3)
1. an adaptive LED driving power circuit is characterized in that comprising switching power circuit, input power supply rectification filter circuit, voltage feedback circuit, current feedback circuit, analog multiplier circuit; The input termination 220V voltage of input power supply rectification filter circuit, output is 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, 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 supply rectification filter circuit comprises fuse F, rectifier bridge D, common mode inductance LA, first inductance L 1, second inductance L 2, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4; Input interface J1 of the end of fuse F and 220V voltage is connected, and the other end is connected with an end of first inductance L 1, an end of first capacitor C 1, and an end of the other end of first capacitor C 1 and second inductance L 2 is connected with another input interface of 220V voltage J2; The other end of first inductance L 1 is connected with the 1st pin of common mode inductance L A, and the other end of second inductance L 2 is connected with the 2nd pin of common mode inductance L A; Rectifier bridge D is made of four diodes, the anode of the first diode D1 is connected the back and is connected with the 3rd pin of common mode inductance L A, an end of second capacitor C 2 with the negative electrode of the second diode D2, the anode of the 3rd diode D3 is connected the back and is connected with the 4th pin of common mode inductance L A, an end of the 3rd capacitor C 3 with the negative electrode of the 4th diode D4, the other end of the other end of second capacitor C 2 and the 3rd capacitor C 3 is connected with the interface of the ground wire J3 of 220V voltage; The anode of the second diode D2 is connected back ground connection with the anode of the 4th diode D4, the negative electrode of the first diode D1 is connected the output of back as the input power supply rectification filter 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, first resistance R 1, 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 voltage error adjuster inverting input of electric current pulse width modulator U1 and the 4th capacitor C 4, one end of first resistance R 1 connects the feedback input end V1 of back as switching power circuit, voltage error adjuster normal phase input end is connected with an end of second resistance R 2, the other end of the voltage error conditioner outlet end and first resistance R 1, one end of the 3rd resistance R 3, one end of the 5th capacitor C 5 connects, the capacitor discharge control end is connected with an end of the 4th resistance R 4, the other end of oscillating capacitance end and the 4th resistance R 4, one end of the 6th capacitor C 6 connects, the oscillation resistance end is connected with an end of the 5th resistance R 5, the soft start end is connected with the positive pole of the 7th capacitor C 7, drive circuitry power end and input supply terminal, 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 reference voltage end and second resistance R 2, one end of the 9th capacitor C 9 connects, PWM modulation output is connected with an end of the 7th resistance R 7, an end of input and the tenth capacitor C 10 is compared in pulse blocking, one end of the 8th resistance R 8 connects, one end of earth terminal 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, one end of the 11 capacitor C 11 connects back ground connection, and other ends 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 connects the back and is connected with the output of input power supply rectification filter circuit, 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 is connected with the anode 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, one end of the 19 capacitor C 19 connects the output interface J4 of back as switching power circuit, the end of the 3rd winding Lc is connected with the anode 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, the negative electrode of light-emitting diode D10 connects back ground connection; The grid of MOSFET pipe VT is connected with the other end of the 7th resistance R 7, and source electrode is connected the output V2 of back 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; The other end of the 4th inductance L 4 is connected another output interface J5 of back as switching power circuit with the other end of the positive pole of the 17 capacitor C 17, the 18 capacitor C 18; The negative electrode of the 9th diode D9 is connected another output V3 of back 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 other end of the 11 resistance R 11 is connected with the anode of light-emitting diode D10;
Described voltage feedback circuit comprises the 12 resistance R the 12, the 13 resistance R 13, sliding becomes resistance Rx; One end of the 12 resistance R 12 is connected with the end of the change resistance Rx that slides, other end ground connection, the other end that slide to become 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 another output V3 of switching power circuit;
Described current feedback circuit comprises amplifier U2, the 14 resistance R the 14, the 15 resistance R the 15, the 16 resistance R the 16, the 17 resistance R the 17, the 18 resistance R the 18, the 19 resistance R the 19, the 20 resistance R the 20, the 21 capacitor C the 21, the 22 capacitor C the 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, the other end of the 22 capacitor C 22 connects the output of back as current feedback circuit, and the 8th pin is connected with power supply VCC; 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; The other end of the 20 resistance R 20 is connected back ground connection 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 an output V2 of switching power circuit;
Described analog multiplier circuit comprises analog multiplier U3, the 21 resistance R the 21, the 22 resistance R the 22, the 23 resistance R 23; The 1st pin of analog multiplier U3 is connected with the output of current feedback circuit, the 2nd pin is connected back ground connection 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.
2. a kind of adaptive LED driving power circuit as claimed in claim 1; it is characterized in that described electric current pulse width modulator U1 is the novel analog numerical value mixing integrated chip that can realize the feedback regulation of current sampling signal; this chip adopts recommends output; can only connect the driven MOS pipe, have under-voltage locking, overvoltage protection and soft start function.
3. a kind of adaptive LED driving power circuit as claimed in claim 1, the voltage signal and the current signal that it is characterized in that switching power circuit output are sampled by voltage feedback circuit and current feedback circuit respectively, and obtain power feedback signal behind the process analog multiplier circuit, the control pulse width modulator is regulated pulsewidth, thereby realizes output constant power at two output interface J4, J5 of switching power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310123615.9A CN103220856B (en) | 2013-04-10 | 2013-04-10 | Self-adapting light emitting diode (LED) driving power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310123615.9A CN103220856B (en) | 2013-04-10 | 2013-04-10 | Self-adapting light emitting diode (LED) driving power circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103220856A true CN103220856A (en) | 2013-07-24 |
| CN103220856B CN103220856B (en) | 2015-01-21 |
Family
ID=48818143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310123615.9A Expired - Fee Related CN103220856B (en) | 2013-04-10 | 2013-04-10 | Self-adapting light emitting diode (LED) driving power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103220856B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103796395A (en) * | 2014-02-19 | 2014-05-14 | 中达电通股份有限公司 | Self-adaptive constant-power LED lamp and control method thereof |
| CN104039039A (en) * | 2014-05-23 | 2014-09-10 | 中国科学院广州能源研究所 | Two-way output constant current LED (Light-Emitting Diode) driving circuit |
| CN107871428A (en) * | 2017-10-31 | 2018-04-03 | 浙江大学城市学院 | A kind of inverter power circuit |
| CN109600881A (en) * | 2018-12-25 | 2019-04-09 | 中山市卓越制品有限公司 | A kind of LED light pipe device |
| CN111725781A (en) * | 2020-06-19 | 2020-09-29 | 浙江普莱得电器有限公司 | Protection circuit and method based on hot air gun |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291076A (en) * | 2008-04-11 | 2008-10-22 | 浙江省能源研究所 | Solar and commercial power complementary uninterruptable power system |
| CN101562929A (en) * | 2009-05-15 | 2009-10-21 | 广州金升阳科技有限公司 | Isolated driving power for high-power light emitting diode |
| KR20110051691A (en) * | 2009-11-11 | 2011-05-18 | (주) 코콤 | Led lighting device |
| CN202276293U (en) * | 2011-09-28 | 2012-06-13 | 深圳茂硕电子科技有限公司 | An intelligent switch power source with constant output power |
| CN102523663A (en) * | 2012-01-06 | 2012-06-27 | 广州市隆都电子有限公司 | Constant-power LED drive circuit |
| JP2012227155A (en) * | 2012-07-11 | 2012-11-15 | Mitsubishi Electric Corp | Light source lighting device and illuminating fixture |
-
2013
- 2013-04-10 CN CN201310123615.9A patent/CN103220856B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291076A (en) * | 2008-04-11 | 2008-10-22 | 浙江省能源研究所 | Solar and commercial power complementary uninterruptable power system |
| CN101562929A (en) * | 2009-05-15 | 2009-10-21 | 广州金升阳科技有限公司 | Isolated driving power for high-power light emitting diode |
| KR20110051691A (en) * | 2009-11-11 | 2011-05-18 | (주) 코콤 | Led lighting device |
| CN202276293U (en) * | 2011-09-28 | 2012-06-13 | 深圳茂硕电子科技有限公司 | An intelligent switch power source with constant output power |
| CN102523663A (en) * | 2012-01-06 | 2012-06-27 | 广州市隆都电子有限公司 | Constant-power LED drive circuit |
| JP2012227155A (en) * | 2012-07-11 | 2012-11-15 | Mitsubishi Electric Corp | Light source lighting device and illuminating fixture |
Non-Patent Citations (1)
| Title |
|---|
| 任国海，江皓: "基于Flyback电路的功率因数校正电源分析", 《2012（杭州）中国长三角照明科技论坛论文集》, 19 November 2012 (2012-11-19) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103796395A (en) * | 2014-02-19 | 2014-05-14 | 中达电通股份有限公司 | Self-adaptive constant-power LED lamp and control method thereof |
| CN104039039A (en) * | 2014-05-23 | 2014-09-10 | 中国科学院广州能源研究所 | Two-way output constant current LED (Light-Emitting Diode) driving circuit |
| CN104039039B (en) * | 2014-05-23 | 2017-01-04 | 中国科学院广州能源研究所 | A kind of constant current LED drive circuit exporting two-way |
| CN107871428A (en) * | 2017-10-31 | 2018-04-03 | 浙江大学城市学院 | A kind of inverter power circuit |
| CN109600881A (en) * | 2018-12-25 | 2019-04-09 | 中山市卓越制品有限公司 | A kind of LED light pipe device |
| CN109600881B (en) * | 2018-12-25 | 2024-03-05 | 中山市卓越制品有限公司 | LED lamp tube device |
| CN111725781A (en) * | 2020-06-19 | 2020-09-29 | 浙江普莱得电器有限公司 | Protection circuit and method based on hot air gun |
| CN111725781B (en) * | 2020-06-19 | 2022-09-13 | 浙江普莱得电器股份有限公司 | Protection circuit and method based on hot air gun |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103220856B (en) | 2015-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103220856A (en) | Self-adapting light emitting diode (LED) driving power circuit | |
| CN203722892U (en) | Linear constant current drive circuit | |
| CN201830521U (en) | Offline type high-power LED (light-emitting diode) constant-current drive power supply | |
| CN106026623B (en) | A kind of isolated electronic switch | |
| CN201937925U (en) | LED constant current driver with function of voltage reduction | |
| CN103152939A (en) | Four-in-one light-dimming circuit of light-emitting diode (LED) power source | |
| CN103517524B (en) | Led emergency controller | |
| CN203136261U (en) | LED light modulation circuit | |
| CN204031528U (en) | A kind of energy-conservation driving circuit of high-power LED lamp | |
| CN102791063A (en) | Intelligent LED module with function of automatic voltage regulation | |
| CN203734880U (en) | High voltage integration AC LED multistage linear drive device | |
| CN102811535A (en) | Ultrahigh-efficiency LED (Light-Emitting Diode) constant-current power supply based on single-stage conversion and controllable rectification | |
| CN203301826U (en) | LED driving circuit composed of discrete components | |
| CN202551458U (en) | Conversion module for driving LED (Light-Emitting Diode) by using electronic ballast | |
| CN201995171U (en) | LED driving power supply with load tracking and frequency reducing functions | |
| CN203039985U (en) | A LED change-over switch circuit using AC sectional driving technology | |
| CN205232515U (en) | Light -emitting diode (LED) driving circuit | |
| CN203261508U (en) | Constant-power LED power supply circuit | |
| CN203136259U (en) | LED power supply four-in-one light modulation circuit | |
| CN203261521U (en) | LED switch power supply circuit | |
| CN208094852U (en) | A kind of highly integrated LED driving encapsulation | |
| CN209345423U (en) | Multichannel dimming drive system | |
| CN203618180U (en) | LED driving apparatus | |
| CN204859676U (en) | LED drive arrangement | |
| CN201878364U (en) | Improved output non-electrolytic capacitance circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20150410 |
|
| EXPY | Termination of patent right or utility model |