SLUA963B June 2020 – October 2022 UCC21710-Q1 , UCC21732-Q1 , UCC5870-Q1
While VCC2 is unpowered, the gate of the external power switch his held off with a passive and active pulldown circuit. The passive pulldown continuous bleeds charge off the gate of the power transistor through a resistor. If the OUTL suddenly rises due to ramping VCC2 during power up, the active pull-down function pulls the IGBT/MOSFET gate to the low state.