With the development of the automotive industry, the requirements for LED car lights are getting higher and higher, especially in terms of safety and energy saving. Because LED car lights are prone to performance degradation in high-temperature environments, such as brightness reduced and increased light attenuation, which seriously affects their service life and reliability, NTC thermistors are required for effective temperature control to reduce the probability of damage to car lights.

In general, NTC thermistors are installed next to the heat sink of LED car lights to quickly and accurately monitor their operating temperature. In this process, the thermistor works together with multiple components to complete temperature monitoring and temperature protection, including controllable switch module, voltage divider circuit, voltage regulator circuit, control module, etc. When the NTC thermistor detects that the working temperature of the LED light is abnormal, the controllable switch module will send instructions to the control module according to the information feeds back from the NTC to limit the current passing through the car light. The voltage regulator circuit provides a stable voltage supply to ensure that the LED car light works in different temperature environments, and the control module can obtain the correct voltage input.

Specifically, when the operating temperature of the LED car light is higher than the preset value, the resistance value of the NTC thermistor will be reduced, and the controllable switch module will turn on according to this situation, and at the same time transmit instructions to the control module to reduce the current through the car light. When the operating temperature of the car light drops to the normal range, the resistance value of the NTC will increase, the controllable switch module will stop the conduction operation, and the LED light will return to normal working state.

Considering the high ambient temperature of LED car lights, in order to ensure the accuracy of NTC temperature measurement, EXSENSE Electronics Technology Co., Ltd. recommends the use of VT series automotive NTC thermistor. This NTC can withstand a temperature up to 150℃, which can be well matched to the junction temperature range of LED car lights to complete temperature monitoring. Moreover, the thermistor has high accuracy, which can maintain an excellent temperature measurement level when the LED car light is working, maintain the normal operation of the car light, and reduce the possibility of damage. In addition, the high stability of automotive NTC thermistor can ensure the smooth operation of LED car lights in a variety of environments, improve their reliability.