NTC chip serves as core temperature monitoring components of automotive LiDAR, bearing the critical task of real-time temperature measurement. NTC detects the junction temperature of the laser chip and the surrounding environmental temperature changes inside the automotive LiDAR, providing accurate temperature feedback signals for the TEC, ensuring that the laser operates stably within a wide temperature range of -40℃ to 85℃. As NTC chip can quickly capture temperature fluctuations, it prevents wavelength shifts and power attenuation caused by abnormal temperature, thus effectively improving the ranging accuracy and anti-interference capability of the automotive LiDAR.

In automotive LiDAR, NTC chip is typically deployed on the surface of the laser heat sink or the cold end of the TEC, allowing for better contact with the heat sources to obtain accurate temperature data. The temperature monitoring of the NTC is based on the characteristic that its resistance decreases exponentially as temperature increases. When the temperature exceeds the set threshold, the NTC chip immediately sends a signal to the MCU to trigger TEC cooling or adjust the laser drive current for closed-loop temperature control. With the continuous breakthroughs in intelligent driving technology, the automotive LiDAR has also put forward higher requirements for the performance of NTC chip. To support the technological upgrades of major manufacturers, EXSENSE Electronics has develop and mass-produce the DT-G series gold termination NTC chip, which offers:

1. High accuracy temperature measurement ensures stable laser output

EXSENSE gold termination NTC has high accuracy (reach to ±0.5%). When the laser experiences abnormal temperature conditions, the NTC can accurately capture real-time temperature data, assisting the automotive LiDAR in timely adjusting junction temperature and reducing the drift rate of the laser output wavelength within the laser of automotive LiDAR.

2. Great stability supports long-term reliable operation of laser

Due to the complexity of automotive working conditions, harsh temperature environments can easily affect the operational status of LiDAR. The great stability of EXSENSE gold termination NTC chip prevents temperature measurement deviations, ensuring that the automotive LiDAR operates normally in various driving environments.

3. Small dimension meets the compact integration requirement of laser

As LiDAR move towards miniaturization, the small dimension of EXSENSE gold electrode chip (0.25mm × 0.25mm) aligns with this trend. The small dimension NTC not only fits the strict space limitations for component installation in laser but also improves the temperature response speed, optimizing the temperature monitoring process and avoiding temperature measurement delay and error.

The sensitivity of automotive LiDAR to temperature determines the importance of gold termination NTC chip within it. With the help of NTC, the LiDAR reduces the occurrence of wavelength drift, better maintaining its ranging accuracy. Furthermore, the unique temperature sensing capability and reliable electrical characteristics of EXSENSE gold termination NTC chip also meets the strict requirements of automotive LiDAR for high-quality temperature monitoring of NTC.