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A LED lamp test circuit with over-temperature protection indication

A technology of LED car lights and test circuits, which is applied in the field of auto parts, and can solve problems such as open circuits, failure to protect the lights of the equipment under test, and high-temperature damage to components.

Active Publication Date: 2019-05-07
长春马瑞利汽车照明系统有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the automobile industry, the technology of car lights is also changing with each passing day. PWM technology is more and more widely used in the field of car lights and car light testing. Traditionally, when testing car lights, real-time monitoring of circuit boards When the temperature exceeds the set temperature threshold, the components will be damaged by high temperature, short circuit, open circuit, etc., which will not be able to protect the lamp of the equipment under test, so it is particularly important to solve this type of problem

Method used

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  • A LED lamp test circuit with over-temperature protection indication
  • A LED lamp test circuit with over-temperature protection indication
  • A LED lamp test circuit with over-temperature protection indication

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Embodiment Construction

[0010] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with examples, which are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0011] Such as figure 1 , 2 , 3, the present embodiment provides a LED lamp test circuit with an over-temperature protection indication, which is characterized in that it includes an input anti-reverse connection and voltage conversion circuit, an over-temperature protection circuit, a PWM waveform generation circuit, and Orange over-temperature indicator light LD1, the input anti-reverse connection and voltage conversion circuit is composed of input anti-reverse connection diode D1, voltage conversion chip IC1 and input and output filter capacitors, the orange over-temperature indicator LD1 is connected to the PWM waveform On the generation circuit, the four pins of the output end of th...

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Abstract

The invention provides an LED lamp test circuit with an over-temperature protection indicator, which includes an input anti-reverse connection and voltage conversion circuit, an over-temperature protection circuit, a PWM waveform generation circuit, an orange over-temperature indicator light, and the circuit can output two circuits PWM waveform and four-way DC voltage. When the circuit is applied in a closed box, it can detect the ambient temperature of the circuit board in real time. When the ambient temperature of the closed box exceeds the set value, the over-temperature protection circuit is activated and the PWM waveform generator is turned off. Lights up the orange over-temperature indicator light.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to an LED lamp test circuit with an over-temperature protection indication. Background technique [0002] With the rapid development of the automobile industry, the technology of car lights is also changing with each passing day. PWM technology is more and more widely used in the field of car lights and car light testing. Traditionally, when testing car lights, real-time monitoring of circuit boards When the temperature exceeds the set temperature threshold, the components will be damaged by high temperature, short circuit, open circuit, etc., and the lamp of the equipment under test cannot be protected. Therefore, it is particularly important to solve this type of problem. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention provides an LED lamp test circuit with an over-temperature protection indication, which has the characteristics o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/44G01K1/02
Inventor 张信何英超
Owner 长春马瑞利汽车照明系统有限公司
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