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JINLING Chen

KIM Chen
 
Chi ming Electronics Co., Ltd. was established in Taiwan in 1984. Has nearly 38 years of experience. Manufacturing LED car lights, LED truck lights. Serving the needs of customers is the most important goal.

News & Events>>Research & Develop

Subject: LED overheat protection device
2023-04-22

LED overheat protection device

Chi-ming Electronics Co., Ltd. in Taiwan, a professional car lamp manufacturer, has developed a high-temperature environment that can be used.
When the environment is high temperature, we use it. NTC thermistors are usually used to protect LED lamp beads in lighting applications.

Its function is to monitor The temperature of the LED lamp bead is used to control the output current of the LED lamp bead to avoid damage or shorten the life of the LED lamp bead due to overheating.

When the ambient temperature of the LED lamp bead rises, the resistance of the NTC thermistor will decrease, thereby reducing the voltage signal input by the Dim pin, and then controlling the decrease of the output current of the power supply or the LED driver to prevent the LED lamp bead from overheating.

On the contrary, when the ambient temperature of the LED lamp bead drops, the resistance of the NTC thermistor will increase, thereby increasing the voltage signal input by the Dim pin, and then controlling the current output of the power supply or the LED driver to increase, and increasing the LED lamp bead. brightness.  

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Therefore, the NTC thermistor can realize the protection and control of the LED lamp bead through temperature feedback control, so as to avoid its damage or shorten its life due to overheating.

This control method can effectively improve the service life and reliability of the LED lamp bead, and maintain its stable performance and brightness.