Temperature Sensors - PTC Thermistors

Temperature Sensors - PTC Thermistors (temperature-sensitive resistors) are widely used devices in various applications ranging from consumer electronics to various light-duty industrial applications. They are used to sense temperature changes in a circuit or system. In this article, we focus on the TFPT0805L1001DV, a high-quality PTC thermistor from TE Connectivity. We will define its application field and working principle.

Application Field

The TFPT0805L1001DV can be used as a temperature-sensing component for a variety of applications. It is most commonly used to measure and monitor temperature changes in charger and adapter circuits, consumer electronic products, light intensity systems, inrush current limiters, and other types of temperature detection and control systems.

Working Principle

The TFPT0805L1001DV features a positive temperature coefficient (PTC), which is also known as a “self-heating” property. This means that the device is able to heat itself and its associated components when the surrounding temperature rises. Therefore, when the device is heated, its resistance increases rapidly, which allows the temperature-sensing circuit to measure the increased temperature and take actions accordingly.

Additionally, the PTC thermistor also has a "self-resetting" property, which allows the device to reset itself to its original temperature when the surrounding temperature cools down. In other words, it will reset its resistance back to its original value once it has cooled down.

Conclusion

In conclusion, the TFPT0805L1001DV is a high-quality PTC thermistor used to sense temperature changes in various applications. It has a positive temperature coefficient and a “self-resetting” property, which makes it extremely useful for temperature measurement and control in various systems and circuits.