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An overvoltage protection circuit and a lamp

A technology of overvoltage protection circuit and stabilizing capacitor, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve problems such as drive circuit damage and voltage fluctuations

Active Publication Date: 2017-12-15
OCEANKING DONGGUAN LIGHTING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an overvoltage protection circuit, which aims to solve the problem of damage to the drive circuit caused by rectified voltage fluctuations

Method used

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  • An overvoltage protection circuit and a lamp
  • An overvoltage protection circuit and a lamp

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Embodiment Construction

[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with 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.

[0014] figure 1 The structure of the overvoltage protection circuit provided by the first embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows.

[0015] An overvoltage protection circuit, the input and output ends of the overvoltage protection circuit are respectively connected to the AC power supply and the drive circuit, and the overvoltage protection circuit includes:

[0016] Bridge rectifier circuit 300, voltage stabilizing capacitor C1, voltage stabilizing ...

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Abstract

The invention is applicable to the field of lamps, and in particular relates to an overvoltage protection circuit and a lamp. In the embodiment of the present invention, the overvoltage protection circuit is composed of independent components. By detecting the voltage change of the output terminal of the overvoltage protection circuit, if the detected voltage value exceeds the protection voltage threshold, the switch tube is controlled to conduct Then, the overvoltage protection circuit is controlled to be turned on through the relay, so as to stabilize the output voltage of the overvoltage protection circuit and realize the protection of the subsequent driving circuit.

Description

technical field [0001] The invention belongs to the field of overvoltage protection circuits, in particular to an overvoltage protection circuit and a lamp. Background technique [0002] With the continuous development of science and technology, new products and new technologies continue to innovate, various lamps have penetrated into daily life and work, and various drive circuits have also appeared, and the drive circuits are sensitive to voltage fluctuations. Very sensitive; if the external input voltage fluctuates greatly, the rectified voltage will also fluctuate greatly, which will easily damage the driving circuit or driving chip of the subsequent stage, causing the lamp to lose its lighting function. Contents of the invention [0003] The purpose of the present invention is to provide an overvoltage protection circuit, aiming to solve the problem of damage to the drive circuit caused by rectified voltage fluctuations. [0004] The present invention is achieved in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04H05B37/02
Inventor 周明杰杨俊昌
Owner OCEANKING DONGGUAN LIGHTING TECH