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Time：Jun 22, 2022 Views：860
An NTC thermistor is a very simple temperature sensor that is very common in consumer electronics.
NTC, also known as negative temperature coefficient thermistor, is a type of sensor resistor whose resistance value decreases with increasing temperature.
The negative temperature coefficient thermistor corresponds to the positive temperature coefficient thermistor, which is called PTC, that is, the resistance value will increase with the increase of temperature.
PTC is generally used in series in the circuit to limit the circuit current and is an overcurrent protection device.
After the current passes through the element, the temperature rises, the resistance of the PTC will increase, and the resistance will increase to limit the increase of the current. Repeatedly, the PTC acts as a switch.
Polymer PTC thermistors are generally called resettable fuses.
Negative temperature coefficient (NTC) thermistors are made of ceramic fired from oxides of components such as manganese (Mn), nickel (Ni), and cobalt (Co), which form the electrodes. Its appearance shape generally has lead type, sheet type and so on.
At the previous Xiaomi digital flagship launch conference, we saw that the Xiaomi Mi 10 series is equipped with 5 temperature sensors, which are placed in the CPU, camera, communication, battery, charging port, etc., to accurately control the temperature.
NTC thermistors should be used in these places, because NTC is cheap, the circuit is simple, and it takes up less PCB area. We all know that the PCB space inside the current flagship mobile phone is expensive.