The device has three integrated phase comparators, each of which monitors the voltage at the SHx pin against the voltage on the VDRAIN pin. The phase comparators can be used to monitor the voltage of the SHx pin for motor commutation control, measurement of the time from input to output, or for diagnostics of the drivers, external MOSFETs, and external load.

The phase comparator thresholds are created with a resistor divider between the VDRAIN and GND pins. The threshold voltage is sent to the phase comparator and compared against the SHx voltage with respect to GND.

The device can be configured to enable three push-pull digital outputs on INLA, INLB and INLC pins. The outputs indicate the status of each phase comparator output. When INLx are used for phase comparator outputs, SPI register bit PWM_MODE must be configured to 010b (3xPWM mode with SPIN enable control) to control low-side gate drivers.

The device integrates a logic to compare the digital inputs INHx and the phase comparator outputs. If a mis-compare is detected, the fault is reported on SPI register bits PHCx_FLT.