There are five internal thermal sensors in the TPS25763-Q1 devices:
- TSD_BB. Two diode OR'ed thermal sensors to monitor
buck-boost power FETs. Disables buck-boost regulator when asserted. USB-PD engine enters
error recovery.
- TSD_PA_VCONN. One thermal sensor located in the PA_VCONN
path. Opens PA_VCONN FET during over-temperature event. USB-PD engine enters error
recovery.
- TSD_PA_VBUS_DISCH. One thermal sensor located in the
PA_VBUS discharge path. Opens PA_VBUS discharge FET during over-temperature. Closes
PA_VBUS discharge FET when temperature decreases below falling hysteresis.
(TSD_HYS) if PA_VBUS is above discharge threshold set by firmware during
decreasing VBUS transition.
- TSD_LDO5V. One thermal sensor located in the LDO_5V
regulator. Operates as master thermal shutdown. Disables device completely during
over-temperature events causing M0 to hard reset. Allows device operation when
temperature decreases below falling hysteresis (TSD_HYS).