The device features an integrated remote temperature sensing, protection and dedicated fault output. In TPS1211x-Q1, remote temperature measurement is done by using transistor in diode configuration. Connect the DIODE pin of TPS1211x-Q1 to the collector and base of a MMBT3904 BJT. The temperature is calculated internally based on difference of measured diode voltages at two test currents.

In TPS12110-Q1 and TPS12112-Q1, after the sensed temperature reaches approximately 150ºC, the device pulls PD low to SRC, turning off the external FET and also asserts FLT_T low. After the temperature reduces to 130ºC, an internally fixed auto-retry cycle of 512 ms commences. FLT_T de-asserts and the external FET turns ON after the retry duration of 512 ms is lapsed.

In TPS12111-Q1, after the sensed temperature crosses 150°C, PD and G get pulled low to SRC. After the TSD hysteresis, PU and G stays latched OFF. The latch gets reset by toggling EN/UVLO below V_(ENF) or by power cycling VS below V_{(VS_PORF)}.

Figure 8-15 shows simplified block diagram of TPS1211x-Q1 DIODE based remote temperature sensing.

Figure 8-15 DIODE based Remote Temperature Sensing Block Diagram