SLUSBL5A February 2015 – June 2019 UCC28730
The DRV pin connects to the MOSFET gate pin, usually through a series resistor. The gate driver provides a gate-drive signal limited to 14 V. The turn-on characteristic of the driver is a 29-mA current source which limits the turn-on dv/dt of the MOSFET drain and reduces the leading-edge current spike, while still providing a gate-drive current to overcome the Miller plateau. The gate-drive turn-off current is determined by the RDS(on) of the low-side driver and any external gate drive resistance. Adding external gate resistance reduces the MOSFET drain turn-off dv/dt, if necessary. Such resistance value is generally higher than the typical 10 Ω commonly used to damp resonance. However, calculation of the external resistance value to achieve a specific dv/dt involves MOSFET parameters beyond the scope of this datasheet.