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LED (light-emitting diode) drive circuit suitable for light dimming

An LED driver and circuit technology, applied in the direction of electric lamp circuit layout, light source, electric light source, etc., can solve the problem of high cost, and achieve the effect of low cost, good performance and simple structure

Inactive Publication Date: 2015-06-10
ZHEJIANG FUTURE LIGHTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The LED drive circuit suitable for dimming is generally divided into a chip solution and a chip-free solution, and the chip price is relatively high, resulting in a generally high cost of the chip solution, and the chip-free solution does not use a chip, but in circuit optimization, Performance improvement and cost control need further research

Method used

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  • LED (light-emitting diode) drive circuit suitable for light dimming

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Embodiment Construction

[0013] The present invention is described in further detail below:

[0014] The present invention is applicable to the dimming LED drive circuit, which includes a rectification and filtering unit 1, a discharge unit 2, an output unit 3, and it also includes a MOS transistor Q1, and a control unit 4 for controlling the on-off of the MOS transistor Q1; The discharge unit 2 includes a resistor R16, a resistor R17, a resistor R18, a resistor R19, a capacitor C2, and a capacitor C3. The resistor R16, the resistor R17, the resistor R18, and the resistor R19 are connected in parallel, and one end of the parallel connection and one end of the capacitor C2 are connected to the rectification filter unit 1 The output end of the parallel connection is connected, the other end of the parallel connection is connected to one end of the capacitor C3, the other end of the capacitor C3 and the other end of the capacitor C2 are connected to the grounding end of the rectifier filter unit 1; the co...

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Abstract

The invention discloses an LED (light-emitting diode) drive circuit suitable for light dimming, which is simple in circuit, good in performance and low in cost. The LED drive circuit comprises a rectifying filter unit (1), a release unit (2) and an output unit (3), further comprises an MOS (metal oxide semiconductor) tube Q1 and a control unit (4) for controlling the on and the off of the MOS tube Q1.

Description

technical field [0001] The invention relates to the technical field of LED driving circuits, in particular to an LED driving circuit suitable for dimming. Background technique [0002] A dimmable LED drive circuit is connected with a thyristor regulator to form a dimmable LED drive circuit. After the regulator is adjusted, it is input to the LED drive circuit suitable for dimming, and the LED drive circuit suitable for dimming is used to drive the LED load. The dimmable LED driving circuit realizes the adjustable brightness of LED lighting and enriches the functions of LED lighting. [0003] The LED drive circuit suitable for dimming is generally divided into a chip solution and a chip-free solution, and the chip price is relatively high, resulting in a generally high cost of the chip solution, and the chip-free solution does not use a chip, but in circuit optimization, Performance improvement and cost control still need further research. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 陈江涛
Owner ZHEJIANG FUTURE LIGHTING CO LTD