ZHCSLZ9C August 2020 – January 2024 UCC21732
PRODUCTION DATA
The FLT pin of the UCC21732 is open drain and can report a fault signal to the DSP/MCU when the overcurrent and short circuit fault is detected through OC pin. The FLT pin is pulled down to GND, and is held in low state unless a reset signal is received from RST/EN. The device has a fault mute time tFLTMUTE, within which the device ignores any reset signal.
The RST/EN is pulled down internally. The device is disabled by default if the RST/EN pin is floating. The pin has two purposes: