CIRCUIT060082

Thermal switch circuit

CIRCUIT060082

Overview

This thermal switch solution will signal low (to a GPIO pin) when a certain temperature is exceeded thus alerting when conditions are no longer optimal or device-safe. This circuit incorporates an NTC thermistor with a comparator configured in a non-inverting fashion.
Features
  • Temperature switching point: Tsp = 100°C
  • Output:
    • Vo = HIGH: T_a < T_sp
    • Vo = LOW: T_a > T_sp
  • Supply:
    • Vcc = 5 V
    • Vee = 0 V
    • V_pu = 3.3 V
Comparators
TLV1701 Single high voltage, low power comparator TLV7041 Nanopower, small size comparator with open-drain output

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Technical documentation

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Type Title Date
* Application note Thermal switch circuit Aug. 02, 2018

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