TEMPFET™ | Automotive Low-Side Temperature Switch
Speed TEMPFET™ - 過熱保護スイッチ
Speed TEMPFET™には温度センサが搭載されており、ベーシックな保護機能を提供します。センサ出力は外部ピンに接続されていて、高速なスイッチングとともに温度に応じた柔軟な応答を実現します。
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Characteristic for TEMPFET™ devices is the temperature sensor. This sensor is mounted on top of a standard MOSFET. The temperature sensor has the behavior of a thyristor. It fires at overtemperature. In the classic version of the TEMPFET™ the temperature sensor is connected already internally in-between gate and source of the MOSFET. In case of an overtemperature it simply shorts gate and source and hence switches the MOSFET off. The TEMPFET™ family offers a temperature sensor that is externally available. This enables the user of TEMPFET™ on the one hand side to define, how the TEMPFET™ should react at overtemperature, on the other hand it extends the application area for temperature protected FET switches towards fast-switching PWM applications. To ensure short circuit protection for classic TEMPEFT™ devices, the maximum gate to source voltage has to be limited.
Overtemperature, overload and even short-circuit protection can be realized using only one external gate resistor.
The TEMPFET™ family provides a cost-effective solution with a first level of protection thanks to its temperature sensor. The sensor enables a fast switching and flexible temperature response control.
The keys for the success of TEMPFET™ in the automotive market are the operating voltage up to 49V, the switching speed up to 1MHz, the temperature sensor and the overtemperature protection via monitoring the temperature sensor. The TEMPFET™ products provides a reliable solution being in the market since more than 30 years.
The TEMPFET™ family is designed to provide a low-cost protected MOSFET solution for applications that require fast switching times. Depending on the level of protection and diagnosis needed, you can choose the product to satisfy even the most challenging application requirements, especially when reliability, robustness and long life are essential.
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