SNIS211D October 2019 – November 2020 TMP63
Use the TMP63 device along with a voltage reference, and a comparator to program the thermal protection. As shown in Figure 9-8, the output of the comparator remains low until the voltage of the thermistor divider, with RBIAS and RTMP63, rises above the threshold voltage set by R1 and R2. When the output goes high, the comparator signals an overtemperature warning signal. The engineer can also program the hysteresis to prevent the output from continuously toggling around the temperature threshold when the output returns low. Either a comparator with built-in hysteresis or feedback resistors may be used.