ZHCS984B June 2012 – May 2019 TPS54678
PRODUCTION DATA.
The device implements an internal thermal shutdown to protect itself if the junction temperature exceeds 170°C. The thermal shutdown forces the device to stop switching when the junction temperature exceeds thermal trip threshold. When the die temperature decreases below 155°C, the device reinitiates the power-up sequence by discharging the SS/TR pin to about 60 mV. The thermal shutdown hysteresis is 15°C.