An emergency light drive control circuit

Abstract

This application relates to an emergency light drive control circuit, the circuit includes: an AC live wire input interface, an AC neutral line input interface, and an emergency light drive control chip; wherein, the emergency light drive control chip includes: an AC detection module, an emergency light detection control module, emergency light drive switch, ESD protection module, and one-way conduction module; the emergency light detection control module is connected with the emergency light drive switch, the AC detection module, the ESD protection module, and the connected to the conduction module; the one-way conduction module is respectively connected to the AC detection module, the ESD protection module, the emergency light drive switch and the emergency light detection control module. Through the emergency light drive control circuit in the present application, the false triggering of the emergency light caused by the reverse connection of the AC input terminal of the emergency drive chip during use is avoided.

Description

technical field [0001] The present application relates to the technical field of emergency lights, in particular to an emergency light drive control circuit. Background technique [0002] The emergency light is mainly suitable for fire emergency lighting, and is the most common lighting tool in fire emergency. It has the functions of long emergency time, high brightness and automatic emergency response when power is off. [0003] figure 1 It is a circuit schematic diagram of an emergency light driving circuit currently on the market. Such as figure 1 As shown, the system circuit includes an equivalent impedance RNL in the AC line network, an AC input source 10 , a single-cell lithium battery 20 , an emergency LED lamp bead 30 , a current limiting resistor R40 and an emergency light driver chip 50 . Wherein, the live wire and the neutral wire of the alternating current are respectively connected with the ACL terminal and the ACN terminal of the emergency light driver chip ...

AI Technical Summary

Problems solved by technology

And, if the number of emergency light drive circuits connected in parallel is more, this phenomenon will be more obvious, and this state is something we don't want to happen in the actual application process

Therefore, at present, the AC live line input terminal ACL and the neutral line input terminal ACN of this emergency driver chip must be connected together correspondingly. This phenomenon often occurs in the product terminal, which increases the failure probability of the emergency light system.

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