The TPS274C65 includes a temperature sensor on the power FET and also within the controller portion of the device. There are two cases that the device will register a thermal shutdown fault:

• T_J,FET > T_ABS
• (T_J,FET – T_J,controller) > T_REL

The first condition enables the device to register a long-term overtemperature event (caused by ambient temperature or too high DC current flow), while the second condition allows the device to quickly register transient heating that is causes in events like short-circuits.

After the fault is detected, the switch will turn off. If T_J,FET passes T_ABS, the fault is cleared when the switch temperature decreases by the hysteresis value, T_HYS. If instead the T_REL threshold is exceeded, the fault is cleared after T_RETRY passes.

Each channel will shut down independently in case of a thermal event, as each has it's own temperature sensor and fault reporting.