13.20.4.3 Programmable Blanking Time

A configuration message is provided to configure the driver current limit blanking time. The blanking time allows the driver to ignore any current spikes that may occur when switching the driver outputs. The allowable blanking times are 500 ns, 1 µs, 2 µs and 4 µs (default). The blanking time will start after the dead-time circuitry has timed out. The DRVBL[1:0] bits of the CFG2 register are used to set the blanking time value.

The blanking time also affects the driver undervoltage lockout. The driver undervoltage lockout latches the external MOSFET undervoltage lockout Fault if the undervoltage condition lasts longer than the time specified by the t_DUVLO parameter. The t_DUVLO parameter takes into account the blanking time if blanking is in progress.