The DRV8376 integrates switching loss optimized gate drivers which minimize the voltage-current (VI) overlap loss during switching by increased slew rate (1.1V/ns typical at 24V). A small dead time enables lower diode conduction losses. The integrated shunt-less current sense eliminates the losses in an external shunt resistor. A smaller dead time and propagation delay enables best utilization of DC bus voltage and achieving the same power delivery for lower motor current, that further reduces motor copper losses.

Figure 4-1 shows the falling edge slew rate of DRV8376 at 48V DC supply and 1A load current (current flows into the phase node from the motor winding). Figure 4-2 shows the rising edge slew rate of DRV8376 at 48V DC supply and 1A load current (current flows in to the phase node into the motor winding). The observed propagation delay is less than 50ns and dead time is approximately 110ns. Very low propagation delay and dead times helps in minimizing the distortion in motor current, enable accurate average motor current sensing and improves the available voltage to the motor.