CN201467511U - Dynatron effect-based light emitting diode illumination driving device - Google Patents
Dynatron effect-based light emitting diode illumination driving device Download PDFInfo
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- CN201467511U CN201467511U CN2009200734902U CN200920073490U CN201467511U CN 201467511 U CN201467511 U CN 201467511U CN 2009200734902 U CN2009200734902 U CN 2009200734902U CN 200920073490 U CN200920073490 U CN 200920073490U CN 201467511 U CN201467511 U CN 201467511U
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Abstract
The utility model discloses a dynatron effect-based light emitting diode illumination driving device, which comprises a high-voltage rectifier circuit, a current switching circuit, a low-voltage rectifier filter circuit, a light emitting diode illumination lamp and a dynatron effect control loop, wherein the input end of the high-voltage rectifier circuit is connected with an alternating current power supply, while an output end is connected with the input end of the current switching circuit; the output end of the current switching circuit is connected with the input end of the low-voltage rectifier filter circuit; the low-voltage rectifier filter circuit is connected with the light emitting diode illumination lamp and the dynatron effect control loop respectively; the output end of the dynatron effect control loop is connected with the control end of the current switching circuit; and the dynatron effect control loop mainly comprises a photoelectric coupler, a sampling resistor and the like, integrates a voltage stabilization control loop and a constant current control loop and has a negative resistance function. The dynamic channel estimation-based dual-mode communication controller ensures the consistency of the luminance of illumination lamps, and has the characteristics of simple circuit structure, fewer components and parts, and low cost.
Description
Technical field
The utility model relates to a kind of diode illuminating device, is specifically related to a kind of diode illumination drive unit based on dynatron effect.
Background technology
Under the background that the worry of current global energy shortage raises once again, energy savings is the major issue that we shall face future, at lighting field, the application of light-emitting diode (LED) luminous product is just attracting common people's sight, light-emitting diode (LED) be called as the 4th generation lighting source or green light source, have characteristics such as energy-saving and environmental protection, the life-span is long, volume is little, can be widely used in fields such as various indications, demonstration, decoration, backlight, general lighting and urban landscape.
The driving force of lighting driving device plays crucial effects to the display quality of light-emitting diode (LED).Existing led lighting drive unit adopts constant-current source, this is based on the design of light-emitting diode (LED) indicial response volt-ampere curve, it is a constant voltage/current isolator strictly speaking, have independently voltage control loop and current controlled circuit, two loops on Boolean logic be " or " relation.Their gather the voltage and the operating current at light-emitting diode (LED) two ends, obtain error voltage with fiducial reference source after relatively, and this error voltage converts Control current switch behind the pulse width modulating signal, operating voltage that obtains setting and electric current to.In addition, also having a kind of led lighting drive unit on the market is the method that adopts general switching power supply+constant-current source, promptly connects a constant-current source, driven for emitting lights diode then after commercially available high-frequency switching power supply.
The shortcoming of the led lighting drive unit of prior art is:
1, the led lighting drive unit of this prior art can not compensate the illumination change that the discreteness of light-emitting diode (LED) forward voltage causes automatically, high-power illumination adopts the InGaN material of plain InGaP aluminium of quaternary and high brightness usually with light-emitting diode (LED) at present, according to the different forward voltage drops of technology between 2.9～3.8V, if with one 700 milliamperes constant-current sources driving 2.9V and the LED of 3.8V, power output equals respectively
P＝2.9×0.7＝2.03W
P＝3.8×0.7＝2.66W
A light-emitting diode (LED) power error is 0.63W, and 10 light-emitting diodes (LED) are formed light-emitting diode (LED) light fixture of nominal power 20W, and power error just reaches 6.3W, and the variation of power must cause the variation of illumination.
2, the control circuit of the led lighting drive unit of this prior art, sequential after the startup is the work earlier of voltage stabilizing control loop, the constant current loop was restarted work after output voltage reached Light-Emitting Diode (LED) forward voltage drop, and reaction speed is slow, poor reliability.
3, the light-emitting diode of this prior art (LED) lighting driving device is stable poor, because there are two control loops in the prior art, I haven't seen you for ages, and fecund is given birth to a limit, can add the phase shifts that are 90 degree to the maximum, thereby cause the instability of circuit.
Summary of the invention
The purpose of this utility model provides a kind of diode illumination drive unit based on dynatron effect, this device can detect the forward voltage of light emitting diode illuminating apparatus in real time, difference according to its forward voltage, automatically revise operating current, thereby guarantee the illumination consistency of the LED illumination lamp of different size.
The purpose of a kind of diode illumination drive unit based on dynatron effect of the utility model is achieved through the following technical solutions: a kind of led lighting drive unit based on dynatron effect comprises high-voltage rectifier, current switching circuit, lower pressure rectifier filter circuit and light-emitting diode (LED) lighting; Also comprise the dynatron effect control loop;
The input of described high-voltage rectifier connects AC power, and the output of high-voltage rectifier connects the input of current switching circuit;
The output of described current switching circuit is connected with the input of lower pressure rectifier filter circuit;
Described lower pressure rectifier filter circuit is connected with light-emitting diode (LED) illuminating lamp and dynatron effect control loop respectively;
The output of described dynatron effect control loop is connected with the control end of current switching circuit.
Described dynatron effect control loop comprises photoelectrical coupler U2, voltage comparator U1, reference voltage Uref, sampling resistor Rup, Rdo, Rsen, resistance R and capacitor C;
The end 1 of described photoelectrical coupler U2 also connects with an end of the output of voltage comparator U1, resistance R, and the end 2 of photoelectrical coupler U2, end 3 are connected with ground;
One end of the positive pole of the negative input end of described voltage comparator U1 and reference voltage Uref, capacitor C also connects, and the end of the positive input terminal of voltage comparator U1 and sampling resistor Rup, Rdo also connects;
The other end of described resistance R is connected with the other end of capacitor C;
The end of the negative pole of described reference voltage Uref, sampling resistor Rsen and ground also connect;
The other end of described sampling resistor Rup is connected with the anode of light-emitting diode (LED) illuminating lamp;
The other end of the other end of described sampling resistor Rdo, sampling resistor Rsen and the negative terminal of light-emitting diode (LED) illuminating lamp also connect.
Above-mentioned a kind of led lighting drive unit based on dynatron effect, wherein, described dynatron effect control loop comprises photoelectrical coupler U2, sampling resistor Rup, Rsen also comprise Zener diode U4;
The two ends of described sampling resistor Rup are connected with the anode of light-emitting diode (LED) illuminating lamp and the end 1 of optical coupler U2 respectively;
The end 2 of described optical coupler U2 is connected with the negative pole of Zener diode U4; The end 3 of optical coupler U2 is connected with ground;
The end of the positive pole of described Zener diode U4, sampling resistor Rsen and the negative terminal of light-emitting diode (LED) illuminating lamp also connect;
The other end of described sampling resistor Ren is connected with ground.
Above-mentioned a kind of led lighting drive unit based on dynatron effect, wherein, described dynatron effect control loop comprises photoelectrical coupler U2, sampling resistor Rup, Rdo, Rsen, resistance R, capacitor C also comprises adjustable three terminal regulator U5 in parallel;
The end 1 of described photoelectrical coupler U2, end 2 are connected with an end of Vcc and resistance R respectively;
The negative electrode of the other end of described resistance R and an end of capacitor C, adjustable three terminal regulator U5 in parallel also connects;
The end of the anode of described adjustable three terminal regulator U5 in parallel, sampling resistor Rsen and ground also connect, and the other end of the end of the control end of adjustable three terminal regulator U5 in parallel, sampling resistor Rup, the end of sampling resistor Rdo, capacitor C also connects;
The other end of the other end of described sampling resistor Rsen, sampling resistor Rdo and the negative terminal of light-emitting diode (LED) illuminating lamp also connect;
The other end of described sampling resistor Rup is connected with the anode of light-emitting diode (LED) illuminating lamp.
Above-mentioned a kind of led lighting drive unit based on dynatron effect, wherein, described dynatron effect control loop comprises photoelectrical coupler U2, sampling resistor Rup, Rdo, Rsen, resistance R, R1, R2, R3, R4, capacitor C also comprises adjustable three terminal regulator U5 in parallel, operational amplifier U3;
One end and the power supply of the end 1 of described photoelectrical coupler U2, the power end of operational amplifier U3, resistance R 3 also connects;
The end 2 of described photoelectrical coupler U2 is connected with an end of resistance R 4, and the end 3 of photoelectrical coupler U2 is connected with ground;
One end of the other end of the output of described operational amplifier U3 and resistance R 4, capacitor C also connects, the end of the positive input terminal of operational amplifier U3 and resistance R 1, R2 also connects, the end of the negative input end of operational amplifier U3 and resistance R, sampling resistor Rup, Rdo also connects, and the end of the other end of the earth terminal of operational amplifier U3, resistance R 2, the anode of adjustable three terminal regulator U5 in parallel, sampling resistor Rsen and ground also connect;
The other end of described resistance R is connected with the other end of capacitor C;
The other end of the other end of the control end of the negative electrode of described adjustable three terminal regulator U5 in parallel, adjustable three terminal regulator U5 in parallel, resistance R 1, resistance R 3 also connects;
The other end of described sampling resistor Rup, Rdo is connected with negative terminal with the anode of light-emitting diode (LED) illuminating lamp respectively;
The other end of described sampling resistor Rsen is connected with the negative terminal of light-emitting diode (LED) illuminating lamp.
Above-mentioned a kind of led lighting drive unit based on dynatron effect, wherein, described dynatron effect control loop comprises photoelectrical coupler U2, sampling resistor Rup, Rdo, Rsen, resistance R, R4, R6, capacitor C also comprises adjustable three terminal regulator U5 in parallel, operational amplifier U3;
The end 1 of described photoelectrical coupler U2 is connected with an end of resistance R 6, and its end 2,3 is connected with ground;
The other end of the output of described operational amplifier U3 and resistance R 6, one end of capacitor C also connects, the positive input terminal of operational amplifier U3 and sampling resistor Rup, the end of Rdo also connects, one end of the negative input end of operational amplifier U3 and resistance R, the negative electrode of adjustable three terminal regulator U5 in parallel, the control end of adjustable three terminal regulator U5 in parallel, resistance R 4 an end and connect, the power end of operational amplifier U3, the other end of resistance R 4 and power supply also connect, the earth terminal of operational amplifier U3, the anode of adjustable three terminal regulator U5 in parallel, the end of sampling resistor Rsen and ground also connect;
The other end of described capacitor C links to each other with the other end of resistance R;
The other end of described sampling resistor Rup, Rdo is connected with negative terminal with the anode of light-emitting diode (LED) illuminating lamp respectively;
The other end of described sampling resistor Rsen is connected with the negative terminal of light-emitting diode (LED) illuminating lamp.
A kind of diode illumination drive unit based on dynatron effect of the utility model makes it compared with prior art owing to adopted technique scheme, has following advantage and good effect:
1, the utility model is owing to be provided with the dynatron effect control loop, and this loop guarantees the consistency of led lamp illumination according to the automatic compensating load electric current of the discrete performance of led lighting PN junction forward voltage.
2, the utility model is because structural design is simple, and used components and parts are few, and cost reduces, and has eliminated at least one limit, and the stability of circuit increases, and is easy to large-scale production and popularization and application.
Description of drawings
Fig. 1 is the structured flowchart of a kind of diode illumination drive unit based on dynatron effect of the utility model.
Fig. 2 is the circuit theory diagrams of the dynatron effect control loop of a kind of diode illumination drive unit based on dynatron effect of the utility model.
Fig. 3 is the circuit theory diagrams of the simple and easy dynatron effect control loop of one of a kind of diode illumination drive unit embodiment based on dynatron effect of the utility model.
Fig. 4 is the circuit theory diagrams of two the low-cost dynatron effect control loop of a kind of diode illumination drive unit embodiment based on dynatron effect of the utility model.
Fig. 5 is the circuit theory diagrams of three the high accuracy suction-type dynatron effect control loop of a kind of diode illumination drive unit embodiment based on dynatron effect of the utility model.
Fig. 6 is the spue circuit theory diagrams of formula dynatron effect control loop of four the high accuracy of a kind of diode illumination drive unit embodiment based on dynatron effect of the utility model.
Fig. 7 is the volt-ampere curve figure of the dynatron effect of a kind of diode illumination drive unit based on dynatron effect of the utility model.
Embodiment
See also shown in the accompanying drawing 1, the utility model comprises high-voltage rectifier 1, current switching circuit 2, lower pressure rectifier filter circuit 3 and light-emitting diode (LED) illuminating lamp 4; Also comprise dynatron effect control loop 5; Wherein, high-voltage rectifier 1, current switching circuit 2, lower pressure rectifier filter circuit 3 and light-emitting diode (LED) illuminating lamp 4 all are prior aries, the input of high-voltage rectifier 1 connects AC power, and the output of high-voltage rectifier 1 connects the input of current switching circuit 2; The output of current switching circuit 2 is connected with the input of lower pressure rectifier filter circuit 3; Lower pressure rectifier filter circuit 3 is connected with light-emitting diode (LED) illuminating lamp 4 and dynatron effect control loop 5 respectively; The output of dynatron effect control loop 5 is connected with the control end of current switching circuit 2.
See also shown in Figure 2ly, dynatron effect control loop 5 comprises photoelectrical coupler U2, voltage comparator U1, reference voltage Uref, sampling resistor Rup, Rdo, Rsen, resistance R and capacitor C; The end 1 of photoelectrical coupler U2 also connects with an end of the output of voltage comparator U1, resistance R, and the end 2 of photoelectrical coupler U2, end 3 are connected with ground; One end of the positive pole of the negative input end of voltage comparator U1 and reference voltage Uref, capacitor C also connects, and the end of the positive input terminal of voltage comparator U1 and sampling resistor Rup, Rdo also connects; The other end of resistance R is connected with the other end of capacitor C; The end of the negative pole of reference voltage Uref, sampling resistor Rsen and ground also connect; The other end of sampling resistor Rup is connected with the anode of light-emitting diode (LED) illuminating lamp; The other end of the other end of sampling resistor Rdo, sampling resistor Rsen and the negative terminal of light-emitting diode (LED) illuminating lamp also connect.
In the circuit shown in the accompanying drawing 2, sampling resistor Rup, the voltage at Rdo sampling Light-Emitting Diode lighting two ends, its partial pressure value Ucom=UO * Rdo/ (Rup+Rdo), this partial pressure value and reference voltage Uref carry out comparison operation on voltage comparator U1, obtain an error voltage, voltage comparator U1 converts error current to after this error voltage being amplified again, current conversion is become the variation of Uce by photoelectrical coupler U2, remove to control the pulse width modulation circuit in the current switching circuit in the accompanying drawing 1, thereby output voltage U o is stablized, and the value of this output voltage U o is:
In the following formula: Uref is a reference voltage, and Rup, Rdo are the sampling resistors of output voltage, and by formula (1) as seen, output voltage U o is stable and irrelevant with load current Io.
In the circuit shown in the accompanying drawing 2, if open circuit sampling resistor Rup, short circuit sampling resistor Rdo, this moment, circuit became a constant-current control circuit, and load current is:
I
O＝(U′
O-U
LED)/R
sen (2)
In the following formula: Uo ' is an open circuit voltage, U
LEDBe light-emitting diode (LED) illuminating lamp voltage, Rsen is the load sampling resistor, by formula (2) as seen, as long as (Uo '-ULED)＞and Uref, load current is exactly constant.
Further see the circuit shown in the accompanying drawing 1, quantitative analysis, be on reference voltage Uref, increase by one (Io * Rsen), reference voltage Uref is dynamic, and the relational expression of output voltage U o and load current Io is:
In the following formula, Rup and Rdo are the sampling resistors of output voltage, ratio R up/Rdo determines output voltage, Rsen is the load current sampling resistor, the size of its value decision ballast point, the dynamic benchmark reference voltage source (intensity of the decision of Uref-Io * Rsen) dynatron effect, with the volt-ampere curve of this formula fitting as shown in Figure 7.
The resistance that draws of ohm theorem is on the occasion of, i.e. U/I=R, and the resistance that is calculated by formula (3) is negative value, and it meets U/I=-R; This is that the utility model is a kind of based on the dynatron effect in the led lighting drive unit of dynatron effect.
See also shown in Figure 7ly, this figure is the curve chart that is negative ohm theorem that the match of formula (3) institute is come out, and by this figure as can be seen, dynatron effect can compensate voltage, the electric current of different led lamps, makes its illumination unanimity.
Based on above-mentioned principle, the utility model is according to the different technologies requirement of various light-emitting lamps, and the dynatron effect control loop is designed to simple and easy dynatron effect control loop, low-cost dynatron effect control loop, high accuracy suction-type dynatron effect control loop, the high accuracy formula dynatron effect control loop that spues.
See also shown in the accompanying drawing 3, embodiment one is simple and easy dynatron effect control loop, and this loop comprises photoelectrical coupler U2, and sampling resistor Rup, Rsen also comprise Zener diode U4; The two ends of sampling resistor Rup are connected with the anode of light-emitting diode (LED) illuminating lamp and the end 1 of optical coupler U2 respectively; The end 2 of optical coupler U2 is connected with the negative pole of Zener diode U4; The end 3 of optical coupler U2 is connected with ground; The end of the positive pole of Zener diode U4, sampling resistor Rsen and the negative terminal of light-emitting diode (LED) illuminating lamp also connect; The other end of sampling resistor Rsen is connected with ground.
See also shown in the accompanying drawing 4, embodiment two is low-cost dynatron effect control loops, and this loop comprises photoelectrical coupler U2, sampling resistor Rup, Rdo, and Rsen, resistance R, capacitor C also comprises adjustable three terminal regulator U5 in parallel; The end 1 of photoelectrical coupler U2, end 2 are connected with an end of Vcc and resistance R respectively; The negative electrode of the other end of resistance R and an end of capacitor C, adjustable three terminal regulator U5 in parallel also connects; The end of the anode of adjustable three terminal regulator U5 in parallel, sampling resistor Rsen and ground also connect, and the other end of the end of the control end of adjustable three terminal regulator U5 in parallel, sampling resistor Rup, the end of sampling resistor Rdo, capacitor C also connects; The other end of the other end of sampling resistor Rsen, sampling resistor Rdo and the negative terminal of light-emitting diode (LED) illuminating lamp also connect; The other end of sampling resistor Rup is connected with the anode of light-emitting diode (LED) illuminating lamp.
In embodiment one and embodiment two, general precision dynatron effect control circuit based on Zener diode U4 and adjustable three terminal regulator U5 in parallel, being actually in common voltage stabilizing control loop increases a current sampling resistor Rsen, has realized easy dynatron effect control loop and dynatron effect control loop cheaply respectively.
See also shown in the accompanying drawing 5, embodiment three is high accuracy suction-type dynatron effect control loops, and this loop comprises photoelectrical coupler U2, sampling resistor Rup, Rdo, Rsen, resistance R, R1, R2, R3, R4, capacitor C also comprises adjustable three terminal regulator U5 in parallel, operational amplifier U3; One end and the power supply of the end 1 of photoelectrical coupler U2, the power end of operational amplifier U3, resistance R 3 also connects; The end 2 of photoelectrical coupler U2 is connected with an end of resistance R 4, and the end 3 of photoelectrical coupler U2 is connected with ground; One end of the other end of the output of operational amplifier U3 and resistance R 4, capacitor C also connects, the end of the positive input terminal of operational amplifier U3 and resistance R 1, R2 also connects, the end of the negative input end of operational amplifier U3 and resistance R, sampling resistor Rup, Rdo also connects, and the end of the other end of the earth terminal of operational amplifier U3, resistance R 2, the anode of adjustable three terminal regulator U5 in parallel, sampling resistor Rsen and ground also connect; The other end of resistance R is connected with the other end of capacitor C; The other end of the other end of the control end of the negative electrode of adjustable three terminal regulator U5 in parallel, adjustable three terminal regulator U5 in parallel, resistance R 1, resistance R 3 also connects; The other end of sampling resistor Rup, Rdo is connected with negative terminal with the anode of light-emitting diode (LED) illuminating lamp respectively; The other end of sampling resistor Rsen is connected with the negative terminal of light-emitting diode (LED) illuminating lamp.
See also shown in the accompanying drawing 6, embodiment four is the high accuracy formula dynatron effect control loops that spue, and this loop comprises photoelectrical coupler U2, sampling resistor Rup, Rdo, Rsen, resistance R, R4, R6, capacitor C also comprises adjustable three terminal regulator U5 in parallel, operational amplifier U3; The end 1 of photoelectrical coupler U2 is connected with an end of resistance R 6, and its end 2,3 is connected with ground; One end of the other end of the output of operational amplifier U3 and resistance R 6, capacitor C also connects, the end of the positive input terminal of operational amplifier U3 and sampling resistor Rup, Rdo also connects, the control end of the negative input end of operational amplifier U3 and the negative electrode of an end of resistance R, adjustable three terminal regulator U5 in parallel, adjustable three terminal regulator U5 in parallel, resistance R 4 an end and connect, the other end of the power end of operational amplifier U3, resistance R 4 and power supply also connect, and the anode of the earth terminal of operational amplifier U3, adjustable three terminal regulator U5 in parallel, the end of sampling resistor Rsen and ground also connect; The other end of capacitor C links to each other with the other end of resistance R; The other end of sampling resistor Rup, Rdo is connected with negative terminal with the anode of light-emitting diode (LED) illuminating lamp respectively; The other end of sampling resistor Rsen is connected with the negative terminal of light-emitting diode (LED) illuminating lamp.
Embodiment three and embodiment four are high accuracy dynatron effect diode illumination drive circuit, mainly comprise an operational amplifier U3, adjustable three terminal regulator U5 in parallel and photoelectrical coupler U2, in circuit, added a current sampling resistor Rsen in addition, be equivalent to the constant current control loop is embedded in the voltage control loop, realized the dynatron effect function.Do not add active device in this circuit, control loop does not produce new limit, does not change the phase margin of circuit, and loop is stable.Wherein high accuracy suction-type dynatron effect control loop has stronger control ability, be applicable to high power LED lighting lamp, high accuracy spue formula dynatron effect control loop control ability a little less than, in being applicable to, low power light-emitting diode (LED) illuminating lamp.
Be not limited to above-mentioned four kinds of embodiment in a kind of led lighting drive unit of the utility model, as long as meet dynatron effect formula (3) and dynatron effect curve shown in Figure 7 all can constitute the dynatron effect diode driving based on dynatron effect.The utlity model has versatility widely, can be used for adopting in the isolated led lighting drive unit of isolated led lighting drive unit, solar energy and storage battery of electric main.
A kind of led lighting drive unit based on dynatron effect of the utility model is applied in the 3W E27 type LED shot-light, has adopted low-cost dynatron effect control loop described in the utility model in this LED spot light.
The utility model is a kind of also to can be applicable to based on the led lighting drive unit of dynatron effect in the car, marine LED fluorescent lamp of 20W, has adopted high accuracy suction-type dynatron effect control loop described in the utility model in this luminous diode lamp fluorescent lamp.
In sum, a kind of diode illumination drive unit based on dynatron effect of the utility model guarantees the voltage stabilizing and the constant current of circuit according to the automatic compensating load electric current of the discreteness of led lighting PN junction forward voltage, and illumination is kept consistency; The utility model is simple in structure, and used components and parts reduce, and cost is low, has eliminated at least one limit, and the stability of circuit increases, and is easy to large-scale production and popularization and application.
Claims (5)
1. the led lighting drive unit based on dynatron effect comprises high-voltage rectifier (1), current switching circuit (2), lower pressure rectifier filter circuit (3) and light-emitting diode (LED) lighting (4); It is characterized in that: also comprise dynatron effect control loop (5);
The input of described high-voltage rectifier (1) connects AC power, and the output of high-voltage rectifier (1) connects the input of current switching circuit (2);
The output of described current switching circuit (2) is connected with the input of lower pressure rectifier filter circuit (3);
Described lower pressure rectifier filter circuit (3) is connected with light-emitting diode (LED) illuminating lamp (4) and dynatron effect control loop (5) respectively;
The output of described dynatron effect control loop (5) is connected with the control end of current switching circuit (2).
Described dynatron effect control loop (5) comprises photoelectrical coupler U2, voltage comparator U1, reference voltage Uref, sampling resistor Rup, Rdo, Rsen, resistance R and capacitor C;
The end 1 of described photoelectrical coupler U2 also connects with an end of the output of voltage comparator U1, resistance R, and the end 2 of photoelectrical coupler U2, end 3 are connected with ground;
One end of the positive pole of the negative input end of described voltage comparator U1 and reference voltage Uref, capacitor C also connects, and the end of the positive input terminal of voltage comparator U1 and sampling resistor Rup, Rdo also connects;
The other end of described resistance R is connected with the other end of capacitor C;
The end of the negative pole of described reference voltage Uref, sampling resistor Rsen and ground also connect;
The other end of described sampling resistor Rup is connected with the anode of light-emitting diode (LED) illuminating lamp;
The other end of the other end of described sampling resistor Rdo, sampling resistor Rsen and the negative terminal of light-emitting diode (LED) illuminating lamp also connect.
2. a kind of led lighting drive unit according to claim 1 based on dynatron effect, it is characterized in that: described dynatron effect control loop (5) comprises photoelectrical coupler U2, sampling resistor Rup, Rsen also comprise Zener diode U4;
The two ends of described sampling resistor Rup are connected with the anode of light-emitting diode (LED) illuminating lamp and the end 1 of optical coupler U2 respectively;
The end 2 of described optical coupler U2 is connected with the negative pole of Zener diode U4; The end 3 of optical coupler U2 is connected with ground;
The end of the positive pole of described Zener diode U4, sampling resistor Rsen and the negative terminal of light-emitting diode (LED) illuminating lamp also connect;
The other end of described sampling resistor Rsen is connected with ground.
3. a kind of led lighting drive unit according to claim 1 based on dynatron effect, it is characterized in that: described dynatron effect control loop (5) comprises photoelectrical coupler U2, sampling resistor Rup, Rdo, Rsen, resistance R, capacitor C also comprises adjustable three terminal regulator U5 in parallel;
The end 1 of described photoelectrical coupler U2, end 2 are connected with an end of Vcc and resistance R respectively;
The negative electrode of the other end of described resistance R and an end of capacitor C, adjustable three terminal regulator U5 in parallel also connects;
The end of the anode of described adjustable three terminal regulator U5 in parallel, sampling resistor Rsen and ground also connect, and the other end of the end of the control end of adjustable three terminal regulator U5 in parallel, sampling resistor Rup, the end of sampling resistor Rdo, capacitor C also connects;
The other end of the other end of described sampling resistor Rsen, sampling resistor Rdo and the negative terminal of light-emitting diode (LED) illuminating lamp also connect;
The other end of described sampling resistor Rup is connected with the anode of light-emitting diode (LED) illuminating lamp.
4. a kind of led lighting drive unit according to claim 1 based on dynatron effect, it is characterized in that: described dynatron effect control loop (5) comprises photoelectrical coupler U2, sampling resistor Rup, Rdo, Rsen, resistance R, R1, R2, R3, R4, capacitor C, also comprise adjustable three terminal regulator U5 in parallel, operational amplifier U3;
One end and the power supply of the end 1 of described photoelectrical coupler U2, the power end of operational amplifier U3, resistance R 3 also connects;
The end 2 of described photoelectrical coupler U2 is connected with an end of resistance R 4, and the end 3 of photoelectrical coupler U2 is connected with ground;
One end of the other end of the output of described operational amplifier U3 and resistance R 4, capacitor C also connects, the end of the positive input terminal of operational amplifier U3 and resistance R 1, R2 also connects, the end of the negative input end of operational amplifier U3 and resistance R, sampling resistor Rup, Rdo also connects, and the end of the other end of the earth terminal of operational amplifier U3, resistance R 2, the anode of adjustable three terminal regulator U5 in parallel, sampling resistor Rsen and ground also connect;
The other end of described resistance R is connected with the other end of capacitor C;
The other end of the other end of the control end of the negative electrode of described adjustable three terminal regulator U5 in parallel, adjustable three terminal regulator U5 in parallel, resistance R 1, resistance R 3 also connects;
The other end of described sampling resistor Rup, Rdo is connected with negative terminal with the anode of light-emitting diode (LED) illuminating lamp respectively;
The other end of described sampling resistor Rsen is connected with the negative terminal of light-emitting diode (LED) illuminating lamp.
5. a kind of led lighting drive unit according to claim 1 based on dynatron effect, it is characterized in that: described dynatron effect control loop (5) comprises photoelectrical coupler U2, sampling resistor Rup, Rdo, Rsen, resistance R, R4, R6, capacitor C, also comprise adjustable three terminal regulator U5 in parallel, operational amplifier U3;
The end 1 of described photoelectrical coupler U2 is connected with an end of resistance R 6, and its end 2,3 is connected with ground;
The other end of the output of described operational amplifier U3 and resistance R 6, one end of capacitor C also connects, the positive input terminal of operational amplifier U3 and sampling resistor Rup, the end of Rdo also connects, one end of the negative input end of operational amplifier U3 and resistance R, the negative electrode of adjustable three terminal regulator U5 in parallel, the control end of adjustable three terminal regulator U5 in parallel, resistance R 4 an end and connect, the power end of operational amplifier U3, the other end of resistance R 4 and power supply also connect, the earth terminal of operational amplifier U3, the anode of adjustable three terminal regulator U5 in parallel, the end of sampling resistor Rsen and ground also connect;
The other end of described capacitor C links to each other with the other end of resistance R;
The other end of described sampling resistor Rup, Rdo is connected with negative terminal with the anode of light-emitting diode (LED) illuminating lamp respectively;
The other end of described sampling resistor Rsen is connected with the negative terminal of light-emitting diode (LED) illuminating lamp.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200734902U CN201467511U (en) | 2009-06-05 | 2009-06-05 | Dynatron effect-based light emitting diode illumination driving device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200734902U CN201467511U (en) | 2009-06-05 | 2009-06-05 | Dynatron effect-based light emitting diode illumination driving device |
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| CN201467511U true CN201467511U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200734902U Expired - Lifetime CN201467511U (en) | 2009-06-05 | 2009-06-05 | Dynatron effect-based light emitting diode illumination driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201467511U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102883499A (en) * | 2011-08-02 | 2013-01-16 | 深圳桑达国际电子器件有限公司 | LED (light-emitting diode) silicon-controlled power supply and constant current control circuit |
| CN104039051A (en) * | 2012-04-13 | 2014-09-10 | 江苏理工学院 | Light emitting diode (LED) illuminating power supply without transformer |
-
2009
- 2009-06-05 CN CN2009200734902U patent/CN201467511U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102883499A (en) * | 2011-08-02 | 2013-01-16 | 深圳桑达国际电子器件有限公司 | LED (light-emitting diode) silicon-controlled power supply and constant current control circuit |
| CN104039051A (en) * | 2012-04-13 | 2014-09-10 | 江苏理工学院 | Light emitting diode (LED) illuminating power supply without transformer |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20100512 |