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LED lamp overheat protection circuit

A technology of overheat protection circuit and LED lamp, which is applied in the electronic field, can solve problems such as temperature rise and safety accidents, and achieve the effect of improving safety

Active Publication Date: 2015-07-15
OCEANKING DONGGUAN LIGHTING TECH +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

When the LED lamp is used for a long time or the LED drive circuit is short-circuited, its temperature will rise, and excessive temperature will cause various safety accidents

Method used

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  • LED lamp overheat protection circuit

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Embodiment Construction

[0010] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0011] figure 1 It is a schematic circuit diagram of an LED lamp overheating protection circuit in an embodiment of the present invention. As shown in the figure, the LED lamp overheating protection circuit in the embodiment of the present invention may at least include an LED driver module, an LED lamp, a thermistor, a control chip and a relay, wherein:

[0012] One end of the thermistor is connected to the negative pole of the power supply, the other end of the ...

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Abstract

An embodiment of the invention discloses an LED lamp overheat protection circuit comprising an LED driving module, an LED lamp, a thermistor, a control chip, and a relay. One end of the thermistor is connected to the negative electrode of a power supply, and the other end of the thermistor is connected with the threshold end of the control chip. The output end of the control chip is connected with the power input end of the relay, the common end of the relay is connected to the positive electrode of the power supply, the normally closed end of the relay is suspended, and the normally open end of the relay is connected with the power input end of the driving module. The output end of the driving module is connected with the LED lamp. The control chip controls the state of the relay according to the voltage under different resistances of the thermistor, the state of the LED driving module is determined by the state of the relay, and thus, on-off of the LED lamp is determined. By adopting the LED lamp overheat protection circuit of the invention, the LED lamp can be turned off when the temperature of the LED lamp is too high, and the safety of the LED lamp is improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an LED lamp overheat protection circuit. Background technique [0002] With the continuous development of electronic technology, users have higher and higher requirements for lighting equipment. Among them, safety indicators have become an important reference factor for users to choose lighting equipment. When the LED lamp is used for a long time or the LED drive circuit is short-circuited, its temperature will rise, and excessive temperature will cause various safety accidents. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present invention is to provide an LED lamp overheating protection circuit, which can realize the function of turning off the LED lamp when the temperature of the LED lamp is too high, and improve the safety of the LED lamp. [0004] In order to solve the above technical problems, an embodiment of the p...

Claims

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Application Information

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