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LED (Light Emitting Diode) constant-current dimming drive circuit device

A driving circuit and constant current dimming technology, applied in the field of lighting, can solve the problems of high cost, easy damage, complex circuit, etc., and achieve the effects of low cost, simple structure and adjustable brightness

Active Publication Date: 2012-10-31
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The DC / DC chopper switching circuit has the advantages of low power consumption, high efficiency, stability and reliability, small unit power volume, light weight, etc., but its disadvantages are high cost, complex circuit, easy damage, and strong high-frequency interference. user inconvenience

Method used

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  • LED (Light Emitting Diode) constant-current dimming drive circuit device
  • LED (Light Emitting Diode) constant-current dimming drive circuit device

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Embodiment Construction

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the LED dimming driving circuit device of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] like figure 1 , in the logic structure diagram of a specific embodiment of an LED constant current dimming drive circuit device of the present invention, it includes a rectification unit 1, a filter unit 2, a constant current drive unit 3, a dimming control unit 4 and an overheating protection unit 5 ;

[0024] Further, the rectifier unit 1 outputs direct current to the filter unit 2, the constant current drive unit 3, the dimming control unit 4, the overheating protection unit 5 and the LED; the constant current drive unit 3 is connected between the...

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Abstract

The invention provides an LED (Light Emitting Diode) constant-current dimming drive circuit device which comprises a rectifier unit, a filter unit, a constant-current driving unit and a dimming control unit, wherein the output end of the rectifier unit is connected to a first I / O (Input / Output) pin of a singlechip computer IC2 through a divider resistor R2; the first I / O pin of the singlechip computer IC2 is also grounded through a dimming potentiometer W1; a second I / O pin of the singlechip computer IC2 is connected to an enabling end of a control chip IC1 through a current-limiting resistor R3; and when the resistance of the dimming potentiometer W1 is adjusted, the second I / O pin of the singlechip computer IC2 outputs a PWM (Pulse Width Modulation) pulse signal, so that the control chip IC1 is positioned in a disconnection or connection work state. Due to the combination of an integrated control chip with low cost and high efficiency with the singlechip computer, the LED constant-current dimming drive circuit device has the advantages of high efficiency, reliability, low price, simple structure and the like.

Description

technical field [0001] The invention belongs to the technical field of lighting, and in particular relates to an LED constant current dimming driving circuit device. Background technique [0002] With the continuous development of science and technology, new products and new technologies are constantly innovating. As a new type of light source, LED has the characteristics of energy saving, environmental protection and high efficiency. There are various LED drive circuits. At present, DC / DC chopping technology is used to drive LEDs in low-voltage places. [0003] The chopper circuit originally refers to "cutting off" a part of the sine wave due to a certain need in the application of electricity. (For example, when the voltage is 50V, use electronic components to cut off the 50-0V part behind, and the output voltage is 0.) Later, it was borrowed into the DC / DC switching circuit, mainly in the process of voltage regulation of the switching power supply. The power supply is ...

Claims

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Application Information

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IPC IPC(8): H05B37/02H02H5/04
Inventor 周明杰黄柯青
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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