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A LED driving surge voltage protection circuit and driving circuit

A LED drive and protection circuit technology, applied in emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, lamp circuit layout, etc., can solve problems such as power grid surge protection short boards, and achieve cost reduction Low cost, good protection effect, high integration effect

Active Publication Date: 2015-11-11
SHINEON BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of circuit is a relatively short board for the surge protection of the power grid.

Method used

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  • A LED driving surge voltage protection circuit and driving circuit

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Embodiment 1

[0022] The present invention provides as attached figure 1 A new type of LED driving surge voltage protection circuit is shown, including an RC integrating circuit and an independent capacitor C2; the RC integrating circuit is used to protect the power input terminal of the IC chip; the positive end of the independent capacitor C2 is connected to the control circuit of the LED chip string The switch input end is connected with the low voltage input end of the rectification circuit at the other end.

[0023] The present invention also provides a novel LED drive circuit with such a surge voltage protection circuit, which also includes a rectifier bridge module, an IC drive module and an LED light source, wherein the rectifier bridge module is connected with an AC power source for converting the AC power into The direct current is sent to the IC drive module; the IC drive module is connected with the rectifier bridge module and the LED light source, and is used to supply power to...

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Abstract

The invention provides an LED driving power surge voltage protection circuit which comprises an RC integral circuit and an independent capacitor. The RC integral circuit is used for protecting the power input end of an IC chip. One end of the positive electrode of the independent capacitor is connected to the input end of a control switch of an LED chip string, and the other end of the positive electrode of the independent capacitor is connected with the low-voltage input end of a rectification circuit. The LED driving power surge voltage protection circuit is simple in structure, low in cost, good in protection effect and applicable to high-voltage and instant power surge voltage protection.

Description

technical field [0001] The invention relates to an LED integrated circuit design. Background technique [0002] LED chips are used in the field of new energy-saving light sources for their high efficiency, high integration, and long life. [0003] be widely used. In LED light sources, power drive is a key technology. Due to the high integration and low cost requirements for LED applications, LED drive solutions without energy storage devices such as inductance and capacitors are taking an increasing share in the market. However, since this type of driving scheme is an independent "light engine", it must be directly compatible with an external power supply, so its LED chips and IC chips must be able to withstand complex electromagnetic environments. Among the common electromagnetic interference, the biggest threat to the exposed IC chip is the so-called power surge. This type of interference generally appears in the inductance generated by the power switch to resist the el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H02H9/04
Inventor 冯向光张海兵孙国喜刘国旭范振灿
Owner SHINEON BEIJING TECH
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