Dimming and color-regulating LED isolation constant current driving power supply

A constant current drive and power supply technology, which is applied in the field of LED dimming lighting devices, can solve the problems of failing to meet the Energy Star standard and high standby power consumption of the power supply, and achieve the effects of low power consumption, slow light decay and strong compatibility

Pending Publication Date: 2018-11-06
DONGGUAN BONTECK HARDWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Again, there are two PWM control signal modules driven by MOS output switch tubes, which are located in the secondary side of the power supply, resulting in high standby power consumption of the power supply, which cannot meet the Energy Star standard

Method used

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  • Dimming and color-regulating LED isolation constant current driving power supply
  • Dimming and color-regulating LED isolation constant current driving power supply

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, the input end of the optocoupler isolation circuit 7 receives the color temperature PWM control signal. The optocoupler isolation circuit 7 includes an optocoupler, which is denoted as the first optocoupler. The color temperature PWM control signal passes through the current limiting resistor R4, the first optocoupler U1 is isolated and transmitted to the secondary of the dimmable LED isolation drive circuit (connected to R5 and the G pole of the switch tube Q1), the C pole of the first optocoupler is connected to the LED color temperature adjustment circuit 8, and the LED color temperature adjustment circuit 8 includes the first output switch tube Q1, the second output switch tube Q3 and the triode Q2. The C pole of the first optocoupler is connected to the negative pole of the power supply end of the warm white light source through the first output switch tube Q1. The C pole of the first optocoupler After the phase inversion of the triode Q2...

Embodiment 2

[0052] Such as figure 2 As shown, the LED color temperature adjustment circuit includes the third output switch tube Q4 and the fourth output switch tube Q5, the color temperature PWM control signal includes the first color temperature PWM control signal and the second color temperature PWM control signal, and the optocoupler isolation circuit includes two optocoupler , respectively the second optocoupler U2 and the third optocoupler U3, the input end of the second optocoupler receives the first color temperature PWM control signal, the input end of the third optocoupler receives the second color temperature PWM control signal, the second optocoupler’s The C pole is connected to the negative pole of the warm white light source power supply terminal through the third output switch tube, and the C pole of the third optocoupler is connected to the negative pole of the positive white light source power supply terminal through the fourth output switch tube.

[0053] The C pole of ...

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Abstract

The invention discloses a dimming and color-regulating LED isolation constant current driving power supply. The power supply comprises a protection circuit, an EMI filtering circuit, a rectifying circuit, a voltage stabilizing circuit, an optical coupler isolation circuit, a control module, an LED light source, an LED color temperature regulating circuit, and an LED brightness regulating circuit,wherein AC mains supply provides a bus DC high voltage after sequentially passing through the protection circuit, the EMI filtering circuit and the rectifying circuit; the control module sends two independent PWM control signals; one signal directly controls a dimming pin of a dimming LED constant current control chip in a dimming LED isolation driving circuit to carry out load dimming on the LEDlight source; and the other signal is converted into two PWM control signals with completely opposite phases through optical couplers and other simple peripheral elements, and the two PWM control signals control quick starting and closing of output switching MOS tubes to regulate output current proportions of light beads with a pure white color temperature and light beads with a warm white color temperature. The dimming and color-regulating LED isolation constant current driving power supply provided by the invention has the advantages of high load compatibility, slow light attenuation of thelight beads, and low energy consumption.

Description

technical field [0001] The invention relates to the field of LED dimming lighting devices, in particular to an isolated constant current driving power supply for dimming and coloring LEDs. Background technique [0002] In the current era, consumers are no longer satisfied with the simple lighting that turns on the light. At the same time, LED lights based on semiconductor technology bring unlimited development space to intelligent control. On this basis, dimming and color LED lights came into being. [0003] Dimming: The brightness can be adjusted from 3% to 100%. Commonly used scenes such as taking care of children at night use 3% moonlight, 30% warm white light when watching TV, and 100% warm white light for dinner and parties. [0004] Toning: The color temperature can be adjusted between warm white and true white. True white can enhance people's attention and is suitable for reading and learning; warm white makes people feel relaxed and is suitable for leisure and enter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/20H05B45/00H05B45/10Y02B20/30
Inventor 邹海富刘江永费业龙廖恩旺聂行王伟英
Owner DONGGUAN BONTECK HARDWARE
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