Details:

The blanking window is typically used to mask any PWM trip events during transitions which would be false trips to the system. If an ePWM trip event remains active for less than three ePWM clocks after the end of the blanking window cycles, there can be an undesired glitch at the ePWM output.

The following picture illustrates the time period which could result in an undesired ePWM output.

The following picture illustrates the two potential ePWM outputs possible if the trip event ends within 1 cycle before or 3 cycles after the blanking window closes.

Workaround(s):

Avoid configuration of blanking window such that the trip input would fall in this range (1 cycle before and 3 cycles after the blanking window closure).