A MOSFET overcurrent event is sensed by monitoring the current flowing through FETs. If the current through a FET exceeds the I_OCP threshold for longer than the t_OCP deglitch time, a OCP event is recognized and action is done according to the OCP_MODE bit. In order to avoid false trigger of OCP during PWM transition due to ringing in phase voltage, there is t_BLANK blanking time applied at each edge of PWM signals in digital. During blanking time, OCP events are ignored.

On hardware device variants, the I_OCP threshold is 5A or 9A (typ) based on MODE pin, the t_{OCP_DEG} is fixed at 1-µs, t_BLANK is fixed at 0.2-µs and the OCP_MODE bit is configured with fast retry with 5-ms automatic retry. On SPI devices, the I_OCP threshold is set through the OCP_LVL, the t_{OCP_DEG} is set through the OCP_DEG, the t_BLANK is set through the OCP_TBLANK and the OCP_MODE bit can operate in four different modes: OCP latched shutdown, OCP automatic retry with fast and slow retry times, OCP report only, and OCP disabled.