SLVSGT3 December 2022 DRV8317
PRODUCTION DATA
An adjustable gate-drive current to the MOSFETs allows for driver output slew rate control. The MOSFET VDS slew rate is a critical factor in optimizing radiated emissions, energy and duration of diode recovery spikes and switching voltage transients related to parasitics. This slew rate is predominantly determined by the rate of gate charge to the MOSFETs as shown in Figure 8-9.
The slew rate of each half-bridge can be adjusted by SLEW pin in hardware variant or by SLEW_RATE register in SPI variant. The slew rate is calculated by the rise-time and fall-time of the voltage on OUTx pin as shown in Figure 8-10.