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Emergency LED lighting circuit with real-time protection function

A technology for LED lighting and protection functions, applied in the field of electronics, can solve the problems of complex structure, poor judgment of the power supply of the LED drive circuit, etc., to achieve the effect of simple structure, less demand for peripheral components, and powerful functions

Active Publication Date: 2016-12-21
江阴元灵芯旷微电子技术有限公司
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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 emergency LED lighting circuit with real-time protection function that can accurately judge the power supply stop of the power grid and the closure of the wall switch for the problems of poor power supply judgment and complex structure of the traditional LED drive circuit

Method used

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  • Emergency LED lighting circuit with real-time protection function
  • Emergency LED lighting circuit with real-time protection function

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Embodiment Construction

[0030] All the features disclosed in this specification, except mutually exclusive features and / or steps, can be combined in any way.

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] An emergency LED lighting circuit with a real-time protection function, comprising a rectifier bridge connected in sequence, an AC-DC drive circuit, a backup power supply, and an LED light source, characterized in that: the LED light source is connected to the backup power supply through a MOS switch tube;

[0033] It also includes a rectification and step-down circuit, a grid power failure detection circuit, an amplifier circuit connected in sequence, and the output end of the amplifier circuit is connected to the driving end of the MOS switch tube.

[0034] The structure of the voltage stabilizing circuit is: its positive input terminal is connected to the positive pole of the diode D4 through the resistor R3, and the negati...

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PUM

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Abstract

The invention relates to the technical field of electron, especially to an emergency LED lighting circuit with a real-time protection function. The emergency LED lighting circuit comprises a rectifier bridge, an AC-DC driving circuit, a stand-by power supply and an LED light source, which are successively connected. The emergency LED lighting circuit is characterized in that the LED light source passes through an MOS switch tube and the stand-by power supply; the emergency LED lighting circuit also comprises a rectification voltage reducing circuit, a power grid power-failure detection circuit and an amplification circuit, which are successively connected; and the output end of the amplification circuit is connected with a driving end of the MOS switch tube. According to the invention, by adopting the method of inverse power supplying of the stand-by power supply and current detection, a wall switch of an LED lamp is detected; when a power grid fails and the wall switch is closed, the stand-by power supply is used for providing power for the LED lamp; when the power grid is electrified and the wall switch is closed and conducted, the AC power supply and stand-by power supply charging mode is entered, and the AC-DC driving circuit is used for charging the stand-by power supply; and the emergency LED lighting circuit is provided with the stand-by power supply, so stable working during discharging and charging of the stand-by power supply is ensured.

Description

technical field [0001] The invention belongs to the field of electronic technology, in particular to an emergency LED lighting circuit with real-time protection function. Background technique [0002] With the decline of LED manufacturing costs, LED lamps with advantages such as high efficiency, low energy consumption, and long life will be more and more widely used in the lighting field. In practical applications, the stability of circuit design has attracted more and more people's attention, so the protection of the output of the LED drive circuit is particularly important. The traditional real-time protection of emergency LED lighting circuits requires multiple dedicated control chips to power supply The situation is judged, and the judgment accuracy is poor, which may easily cause false triggering. Contents of the invention [0003] The purpose of the present invention is to provide an emergency LED lighting circuit with real-time protection function that can accurate...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00Y02B20/30
Inventor 俞德军刘志刚周乙伟陈远文
Owner 江阴元灵芯旷微电子技术有限公司