LED emergency light triggering, starting and under-voltage protection circuit

Abstract

The invention discloses an LED emergency light triggering, starting and under-voltage protection circuit. The circuit comprises an AC / DC constant-current power source, a mains supply detection module, an LED module set 1, an LED module set 2, a charging circuit and a DC / DC constant-current power source; the DC-DC switching power source structure system design is directly adopted; a triggering and starting circuit and an under-voltage protection circuit are integrated, so that one relay circuit structure can be shared; and therefore, the LED emergency light triggering, starting and under-voltage protection circuit has the advantages of high work conversion efficiency and small size, and can satisfy design requirements of small-size LED emergency lights. The triggering and starting circuit can fast respond to power outage; and the under-voltage protection circuit can make an LED driver stop working when the voltage of a battery is reduced to a certain voltage, and therefore, the deep discharge of the battery can be avoided.

Description

technical field [0001] The invention belongs to the technical field of electronic information, and in particular relates to a trigger start and undervoltage protection circuit for an LED emergency light. Background technique [0002] Emergency lighting refers to lighting facilities that are used only under abnormal conditions, including: standby lighting, evacuation lighting, and safety lighting. Emergency lighting and evacuation lighting are particularly important when disasters occur in civil buildings. When the external power supply is interrupted, the people in the building can quickly and safely evacuate the disaster area, and the emergency lighting system in the building plays a major role. It is very important to design emergency lighting that is safe, reliable, technologically advanced, and economically reasonable. [0003] There are two deficiencies in the existing LED emergency lighting design: first, the trigger start circuit and undervoltage protection circuit ...

AI Technical Summary

Problems solved by technology

[0003] There are two deficiencies in the existing LED emergency lighting design: first, the trigger start circuit and undervoltage protection circuit of the traditional LED emergency light work independently; second, the existing LED emergency light battery packs usually use DC- The AC inverter structure makes it work with low conversion efficiency, and the volume is very large, and even the undervoltage protection circuit has no defects such as

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