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A light source abnormal alarm circuit for led lamps

A technology of LED lamps and abnormal alarm, which is applied in the field of electronic circuit design, can solve the problems of alarming when short circuit or open circuit, partial damage of light source, failure to alarm, etc., and achieves the effects of ingenious circuit design, comprehensive coverage, and perfect alarm function

Active Publication Date: 2018-11-27
HANGZHOUSNGOOSE ELECTRICAL
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Problems solved by technology

A few directly adopt the LED constant current power output power supply scheme, which has the phenomenon that when the light source is short-circuited and the power supply of the alarm module is lost at the same time without alarming, or the alarm module only alarms when the light source is completely short-circuited or open-circuited, and cannot alarm when the light source is partially damaged.

Method used

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  • A light source abnormal alarm circuit for led lamps

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Embodiment Construction

[0018] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0019] A light source abnormal alarm circuit for LED lamps, connected to the driving power supply of the LED lamp, the light source abnormal alarm circuit cuts off the light source circuit when the light source is short-circuited or has a low conduction voltage drop, and outputs an indicator light signal and a buzzer Alarm signal; when the light source current is lower than the preset value, output indicator light signal and buzzer alarm signal. The circuit of the invention is directly connected to the output end of the LED drive power supply, and outputs different processing results for different faults of the light source, thus having wide coverage and relatively perfect ala...

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Abstract

The invention discloses a light source abnormal alarm circuit of an LED lamp, which is connected to a driving power supply of the LED lamp. The light source abnormal alarm circuit cuts off the light source circuit and outputs an indicator light signal when the light source is short-circuited or has a low conduction voltage drop. and buzzer alarm signal; when the light source current is lower than the preset value, output indicator light signal and buzzer alarm signal. The circuit of the invention is directly connected to the output end of the LED drive power supply, and outputs different processing results for different faults of the light source, thus having wide coverage and relatively perfect alarm function.

Description

technical field [0001] The invention belongs to the field of electronic circuit design, and in particular relates to an abnormal light source alarm circuit of an LED lamp. Background technique [0002] With the popularization of LED lamps, constant current LED drive power supply with various protection functions such as overvoltage and short circuit protection has become an indispensable part of lamps. In the emergency centralized power supply lamps, the national fire protection standard GB17945-2010 requires that the lamps need to generate sound and light alarm signals when the main light source is abnormal, that is, light signals and sound signals need to be generated at the same time to remind people to replace the lamp or light source. Therefore, the lamp needs to add a light source alarm module, but the general alarm module needs to adopt the technical solution of additional power supply. A few directly adopt the LED constant current power supply output power supply sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/50
Inventor 肖昌渺吴益辉吴一凡金一峰沈翔
Owner HANGZHOUSNGOOSE ELECTRICAL
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