CN201328203Y - Dimmable three-channel large-power LED constant-flow driver module - Google Patents
Dimmable three-channel large-power LED constant-flow driver module Download PDFInfo
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- CN201328203Y CN201328203Y CNU2008201573388U CN200820157338U CN201328203Y CN 201328203 Y CN201328203 Y CN 201328203Y CN U2008201573388 U CNU2008201573388 U CN U2008201573388U CN 200820157338 U CN200820157338 U CN 200820157338U CN 201328203 Y CN201328203 Y CN 201328203Y
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Abstract
The utility model relates to a dimmable three-channel large-power LED constant-flow driver module, which comprises input interfaces, output interfaces, LED constant-flow driver chips, capacitors, resistors, inductors and opto-couplers. Three channels of LED constant-flow driver circuits are connected with an external power supply in parallel through input power interfaces. All the channels of the driver circuits are identical in structure, utilize the LED constant-flow driver chips as cores to form the Buck circuit topology, and can set different output current values by changing resistance valves of current sampling resistors. A PWM dimming pin of each chip is connected with the input power interface via a divider resistance, and then forms an isolated PWM dimming interface via the opto-couplers. The utility model can simultaneously drive three channels of large-power LED with 97% efficiency and high reliability, and damages of single channel of LED string can not influence normal operation of other two channels. Besides, the utility model can perform isolating PWM dimming control.
Description
Technical field
The utility model belongs to power technique fields, is specifically related to a kind of tunable optical 3 road great power LED constant-current driven modules.
Background technology
Semiconductor technology is breeding a new Industrial Revolution again after having caused microelectronic revolution---illumination revolution.The characteristics of light-emitting diode (LED) make it obtain very big application in fields such as demonstration and special lightings.It is the appearance in general lighting market, particularly great power LED that but the theoretic high light efficiency of LED makes its potential huge applications prospect, and making LED be used for general illumination becomes possibility.But LED is because himself special nature needs constant-current driving, and general on the market generally all be stabilized voltage power supply, this just need add the one-level constant-current drive circuit before driving LED.
The main performance index of existing LED constant-current drive circuit has:
(1) circuit efficiency, the i.e. power that dissipated of drive circuit itself.This part power can't be converted into the light that LED sends, and should be reduced as far as possible.
(2) the robustness problem of circuit can not produce serious influence to the operate as normal of other LED of this light fixture when a certain LEDs damages as far as possible.
(3) whether this drive circuit can light modulation.The LED driver module of tunable optical can be according to environment, and the power consumption of dynamic adjustments light fixture is more energy-conservation.
Summary of the invention
The purpose of this utility model is to propose a kind of tunable optical 3 road great power LED constant-current driven modules.
Tunable optical 3 road great power LED constant-current driven modules that the utility model proposes, LED constant-current drive circuit LED1, LED2, LED3 are connected with external power source by input power interface J2 respectively in parallel, and each LED constant-current drive circuit includes constant-current driven chip, inductance, electric capacity, resistance, Schottky diode;
In LED constant-current drive circuit LED1, the pin VIN of constant-current driven chip U1 connects the pin VIN of input power connection J2, the pin VIN of constant-current driven chip U1 connects power supply by capacitor C 7, the pin SW of constant-current driven chip U1 is connected to the positive pole of LED constant-current drive circuit LED1 output interface by inductance L 1, and the positive pole of this LED constant-current drive circuit LED1 output interface links to each other with power supply with sampling resistor R1 by capacitor C 1; Be connected to the negative pole of LED constant-current drive circuit LED1 output interface between capacitor C 1 and the sampling resistor R1, the negative pole of LED constant-current drive circuit LED1 output interface links to each other with the pin CS of LED constant-current driven chip U1, the pin VIN of LED constant-current driven chip U1 connected resistance R 4 with, the pin RON of LED constant-current driven chip U1 links to each other; The pin GND of LED constant-current driven chip U1 links to each other with power supply ground, the pin VCC of LED constant-current driven chip U1 links to each other with power supply ground by capacitor C 10, the pin BOOT of LED constant-current driven chip U1 links to each other with the pin SW of LED constant-current driven chip U1 by capacitor C 4, the negative electrode of Schottky diode D1 meets the pin SW of LED constant-current driven chip U1, and the anode of Schottky diode D1 links to each other with power supply;
In LED constant-current drive circuit LED2, the pin VIN of constant-current driven chip U2 connects the pin VIN of input power connection J2, the pin VIN of constant-current driven chip U2 connects power supply by capacitor C 8, the pin SW of constant-current driven chip U2 is connected to the positive pole of LED constant-current drive circuit LED2 output interface by inductance L 2, and the positive pole of this LED constant-current drive circuit LED2 output interface links to each other with power supply with sampling resistor R2 by capacitor C 2; Be connected to the negative pole of LED constant-current drive circuit LED2 output interface between capacitor C 2 and the sampling resistor R2, the negative pole of LED constant-current drive circuit LED2 output interface links to each other with the pin CS of LED constant-current driven chip U2, and the pin VIN of LED constant-current driven chip U2 links to each other with the pin RON of LED constant-current driven chip U2 by resistance R 5; The pin GND of LED constant-current driven chip U2 links to each other with power supply ground, the pin VCC of LED constant-current driven chip U2 links to each other with power supply ground by capacitor C 11, the pin BOOT of LED constant-current driven chip U2 links to each other with the pin SW of LED constant-current driven chip U2 by capacitor C 5, the negative electrode of Schottky diode D2 meets the pin SW of LED constant-current driven chip U2, and the anode of Schottky diode D2 links to each other with power supply;
In LED constant-current drive circuit LED3, the pin VIN of constant-current driven chip U3 connects the pin VIN of input power connection J2, the pin VIN of constant-current driven chip U3 connects power supply by capacitor C 9, the pin SW of constant-current driven chip U3 is connected to the positive pole of LED constant-current drive circuit LED3 output interface by inductance L 3, and the positive pole of this LED constant-current drive circuit LED3 output interface links to each other with power supply with sampling resistor R3 by capacitor C 3; Be connected to the negative pole of LED constant-current drive circuit LED3 output interface between capacitor C 3 and the sampling resistor R3, the negative pole of LED constant-current drive circuit LED3 output interface links to each other with the pin CS of LED constant-current driven chip U3, and the pin VIN of LED constant-current driven chip U3 links to each other with the pin RON of LED constant-current driven chip U3 by resistance R 6; The pin GND of LED constant-current driven chip U3 links to each other with power supply ground, the pin VCC of LED constant-current driven chip U3 links to each other with power supply ground by capacitor C 12, the pin BOOT of LED constant-current driven chip U3 links to each other with the pin SW of LED constant-current driven chip U3 by capacitor C 6, the negative electrode of Schottky diode D3 meets the pin SW of LED constant-current driven chip U3, and the anode of Schottky diode D3 links to each other with power supply;
The pin DIM of constant-current driven chip U1, U2 and U3 links to each other with input power interface J2 with resistance R 9 by divider resistance R8 respectively, and resistance R 9 other ends connect the pin 4 of optocoupler U4.The negative electrode of voltage stabilizing didoe D4 is connected between resistance R 8 and the resistance R 9, and the anode of voltage stabilizing didoe D4 links to each other with power supply; The pin 3 of optocoupler U4 be connected power supply, the pin one of optocoupler U4 connects the positive pole of input power interface J2 by resistance R 7L, the pin two of optocoupler U4 connects the negative pole of input power interface J2.
Wherein said LED constant-current driven chip is LM3404HV; The driver module total power is normally moved when the light modulation input is input as high level or does not have input signal.Voltage-stabiliser tube can guarantee that the voltage on the constant-current driven chip DIM pin can not surpass its maximum withstand voltage.
Have 3 tunnel LED constant-current driven chips independently, from the power taking of input power supply, realize constant current output 3 road great power LEDs with the form of parallel connection.In addition, circuit is reserved a dim signal input interface, makes external PWM dimmer voltage signal can control the duty ratio of constant current chip through optocoupler, thereby realizes dynamic light adjustment.
The course of work of the present utility model is as follows:
Interface J1 is connect 3 paths of LEDs lamp strings respectively, and the VIN of interface J2 connects the positive pole of input DC power, and GND connects the negative pole of input power supply, and PWM connects the positive pole of light modulation line, and PGND connects the negative pole of light modulation line.Open the input power supply, module is started working, and the current stabilization that will export 3 paths of LEDs lamp strings is at particular value.When light adjusting controller is exported the PWM waveform of different duty by the light modulation line, LED lamp string output different capacity.
Advantage of the present utility model is:
1 adopts single interface power supply input and 3 tunnel independence constant currents output, and the current difference that guarantees each road has guaranteed the consistency of LED operating state in 5%.
2 adopt the LED constant-current driven chip with low comparative voltage and COT constant current control strategy, reduce the loss on peripheral components to greatest extent, have improved the efficient of system.
3 adopt light-coupled isolation PWM dim signal, can realize at a distance the dynamic light adjustment of driver module being controlled, and, when not adding dim signal, still can realize driven to LED.
Description of drawings
Fig. 1 is the structural diagrams of tunable optical 3 road great power LED constant-current driven modules.
Number in the figure: U1, U2, U3 are respectively constant-current driven chip; U4 is an optocoupler; L1, L2, L3 are respectively inductance; C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12 are respectively electric capacity; R1 is a sampling resistor; R2, R3, R4, R5, R6, R7, R8, R9 are respectively resistance; D1, D2, D3 are respectively Schottky diode; D4 is a voltage stabilizing didoe; J1 is a joint; J2 is the input power interface; LED1, LED2, LED3 are respectively the LED constant-current drive circuit.
Embodiment
Further specify the utility model below by embodiment.
Embodiment 1:3 LED constant-current drive circuits is connected with external power source by the input power interface in parallel.Wherein said LED constant-current driven chip is LM3404HV.
In the No. 1 drive circuit, LED constant-current driven chip U1 pin VIN is directly connected to input interface, and links to each other with power supply ground by capacitor C 7.The pin SW of U1 is connected to the positive pole of this paths of LEDs output interface by an inductance L 1, and this positive pole links to each other with power supply ground with sampling resistor R1 by capacitor C 1.Be connected to the negative pole of LED output interface between capacitor C 1 and the sampling resistor R1, and link to each other with the pin CS of U1, pin VIN connects the positive pole of input power supply, and links to each other with pin RON by a resistance R 4.The pin GND of U1 directly links to each other with power supply ground, and pin VCC links to each other with power supply ground by capacitor C 10, and pin BOOT links to each other with pin SW by capacitor C 4, and the negative electrode of Schottky diode D1 meets U1 pin SW, and anode links to each other with power supply ground.
In the No. 2 drive circuit, LED constant-current driven chip U1 pin VIN is directly connected to input interface, and links to each other with power supply ground by capacitor C 8.The pin SW of U1 is connected to the positive pole of this paths of LEDs output interface by an inductance L 2, and this positive pole links to each other with power supply ground with sampling resistor R2 by capacitor C 2.Be connected to the negative pole of LED output interface between capacitor C 2 and the sampling resistor R2, and link to each other with the pin CS of U2, pin VIN connects the positive pole of input power supply, and links to each other with pin RON by a resistance R 5.The pin GND of U1 directly links to each other with power supply ground, and pin VCC links to each other with power supply ground by capacitor C 11, and pin BOOT links to each other with pin SW by capacitor C 5, and the negative electrode of Schottky diode D2 meets U2 pin SW, and anode links to each other with power supply ground.
In the No. 3 drive circuit, LED constant-current driven chip U3 pin VIN is directly connected to input interface, and links to each other with power supply ground by capacitor C 9.The pin SW of U3 is connected to the positive pole of this paths of LEDs output interface by an inductance L 3, and this positive pole links to each other with power supply ground with sampling resistor R3 by capacitor C 3.Be connected to the negative pole of LED output interface between capacitor C 3 and the sampling resistor R3, and link to each other with the pin CS of U3, pin VIN connects the positive pole of input power supply, and links to each other with pin RON by a resistance R 6.The pin GND of U3 directly links to each other with power supply ground, and pin VCC links to each other with power supply ground by capacitor C 12, and pin BOOT links to each other with pin SW by capacitor C 6, and the negative electrode of Schottky diode D3 meets U3 pin SW, and anode links to each other with power supply ground.
The pin DIM of constant-current driven chip U1, U2 and U3 links to each other with the input power interface with R9 by two divider resistance R8, and is connected to 4 pin of optocoupler U4.The negative electrode of voltage-stabiliser tube D4 is connected between resistance R 8 and the R9, and anode links to each other with power supply ground.3 pin of optocoupler directly link to each other with power supply ground, and its 1 pin links to each other with the positive pole of dimming interface by resistance, and 2 pin of U4 are connected to the negative pole of dimming interface.Wherein said LED constant-current driven chip is LM3404HV; Optocoupler U4 adopts TLP521-1, and the driver module total power is normally moved when the light modulation input is input as high level or does not have input signal.Voltage-stabiliser tube can guarantee that the voltage on the constant-current driven chip DIM pin can not surpass its maximum withstand voltage.
Claims (1)
1, a kind of tunable optical 3 road great power LED constant-current driven modules, it is characterized in that: LED constant-current drive circuit LED1, LED2, LED3 are connected with external power source by input power interface J2 respectively in parallel, and each LED constant-current drive circuit includes constant-current driven chip, inductance, electric capacity, resistance, Schottky diode;
In LED constant-current drive circuit LED1, the pin VIN of constant-current driven chip U1 connects the pin VIN of input power connection J2, the pin VIN of constant-current driven chip U1 connects power supply by capacitor C 7, the pin SW of constant-current driven chip U1 is connected to the positive pole of LED constant-current drive circuit LED1 output interface by inductance L 1, and the positive pole of this LED constant-current drive circuit LED1 output interface links to each other with power supply with sampling resistor R1 by capacitor C 1; Be connected to the negative pole of LED constant-current drive circuit LED1 output interface between capacitor C 1 and the sampling resistor R1, the negative pole of LED constant-current drive circuit LED1 output interface links to each other with the pin CS of LED constant-current driven chip U1, the pin VIN of LED constant-current driven chip U1 connected resistance R 4 with, the pin RON of LED constant-current driven chip U1 links to each other; The pin GND of LED constant-current driven chip U1 links to each other with power supply ground, the pin VCC of LED constant-current driven chip U1 links to each other with power supply ground by capacitor C 10, the pin BOOT of LED constant-current driven chip U1 links to each other with the pin SW of LED constant-current driven chip U1 by capacitor C 4, the negative electrode of Schottky diode D1 meets the pin SW of LED constant-current driven chip U1, and the anode of Schottky diode D1 links to each other with power supply;
In LED constant-current drive circuit LED2, the pin VIN of constant-current driven chip U2 connects the pin VIN of input power connection J2, the pin VIN of constant-current driven chip U2 connects power supply by capacitor C 8, the pin SW of constant-current driven chip U2 is connected to the positive pole of LED constant-current drive circuit LED2 output interface by inductance L 2, and the positive pole of this LED constant-current drive circuit LED2 output interface links to each other with power supply with sampling resistor R2 by capacitor C 2; Be connected to the negative pole of LED constant-current drive circuit LED2 output interface between capacitor C 2 and the sampling resistor R2, the negative pole of LED constant-current drive circuit LED2 output interface links to each other with the pin CS of LED constant-current driven chip U2, and the pin VIN of LED constant-current driven chip U2 links to each other with the pin RON of LED constant-current driven chip U2 by resistance R 5; The pin GND of LED constant-current driven chip U2 links to each other with power supply ground, the pin VCC of LED constant-current driven chip U2 links to each other with power supply ground by capacitor C 11, the pin BOOT of LED constant-current driven chip U2 links to each other with the pin SW of LED constant-current driven chip U2 by capacitor C 5, the negative electrode of Schottky diode D2 meets the pin SW of LED constant-current driven chip U2, and the anode of Schottky diode D2 links to each other with power supply;
In LED constant-current drive circuit LED3, the pin VIN of constant-current driven chip U3 connects the pin VIN of input power connection J2, the pin VIN of constant-current driven chip U3 connects power supply by capacitor C 9, the pin SW of constant-current driven chip U3 is connected to the positive pole of LED constant-current drive circuit LED3 output interface by inductance L 3, and the positive pole of this LED constant-current drive circuit LED3 output interface links to each other with power supply with sampling resistor R3 by capacitor C 3; Be connected to the negative pole of LED constant-current drive circuit LED3 output interface between capacitor C 3 and the sampling resistor R3, the negative pole of LED constant-current drive circuit LED3 output interface links to each other with the pin CS of LED constant-current driven chip U3, and the pin VIN of LED constant-current driven chip U3 links to each other with the pin RON of LED constant-current driven chip U3 by resistance R 6; The pin GND of LED constant-current driven chip U3 links to each other with power supply ground, the pin VCC of LED constant-current driven chip U3 links to each other with power supply ground by capacitor C 12, the pin BOOT of LED constant-current driven chip U3 links to each other with the pin SW of LED constant-current driven chip U3 by capacitor C 6, the negative electrode of Schottky diode D3 meets the pin SW of LED constant-current driven chip U3, and the anode of Schottky diode D3 links to each other with power supply;
The pin DIM of constant-current driven chip U1, U2 and U3 links to each other with input power interface J2 with resistance R 9 by divider resistance R8 respectively, and resistance R 9 other ends connect the pin 4 of optocoupler U4.The negative electrode of voltage stabilizing didoe D4 is connected between resistance R 8 and the resistance R 9, and the anode of voltage stabilizing didoe D4 links to each other with power supply; The pin 3 of optocoupler U4 be connected power supply, the pin one of optocoupler U4 connects the positive pole of input power interface J2 by resistance R 7L, the pin two of optocoupler U4 connects the negative pole of input power interface J2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201573388U CN201328203Y (en) | 2008-12-18 | 2008-12-18 | Dimmable three-channel large-power LED constant-flow driver module |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201573388U CN201328203Y (en) | 2008-12-18 | 2008-12-18 | Dimmable three-channel large-power LED constant-flow driver module |
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| CN201328203Y true CN201328203Y (en) | 2009-10-14 |
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| CNU2008201573388U Expired - Fee Related CN201328203Y (en) | 2008-12-18 | 2008-12-18 | Dimmable three-channel large-power LED constant-flow driver module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848570A (en) * | 2009-03-26 | 2010-09-29 | 江苏日月照明电器有限公司 | Large power LED constant-current drive technology |
| CN104080226A (en) * | 2013-03-26 | 2014-10-01 | 无锡华润华晶微电子有限公司 | Circuit controlling on-off of triode according to sampling current |
| CN108811246A (en) * | 2018-06-20 | 2018-11-13 | 苏州欧普照明有限公司 | A kind of light adjusting circuit and light-dimming method for realizing a variety of dimming modes |
| CN108811246B (en) * | 2018-06-20 | 2024-04-26 | 苏州欧普照明有限公司 | Dimming circuit and dimming method for realizing multiple dimming modes |
-
2008
- 2008-12-18 CN CNU2008201573388U patent/CN201328203Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848570A (en) * | 2009-03-26 | 2010-09-29 | 江苏日月照明电器有限公司 | Large power LED constant-current drive technology |
| CN104080226A (en) * | 2013-03-26 | 2014-10-01 | 无锡华润华晶微电子有限公司 | Circuit controlling on-off of triode according to sampling current |
| CN104080226B (en) * | 2013-03-26 | 2016-04-27 | 无锡华润华晶微电子有限公司 | A kind of circuit controlling triode switch according to sample rate current |
| CN108811246A (en) * | 2018-06-20 | 2018-11-13 | 苏州欧普照明有限公司 | A kind of light adjusting circuit and light-dimming method for realizing a variety of dimming modes |
| CN108811246B (en) * | 2018-06-20 | 2024-04-26 | 苏州欧普照明有限公司 | Dimming circuit and dimming method for realizing multiple dimming modes |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20111218 |