DocID024597 Rev 3 581/1693
RM0351 Comparator (COMP)
588
Figure 140. Comparator hysteresis
19.3.7 Comparator output blanking function
The purpose of the blanking function is to prevent the current regulation to trip upon short
current spikes at the beginning of the PWM period (typically the recovery current in power
switches anti parallel diodes).It consists of a selection of a blanking window which is a timer
output compare signal. The selection is done by software (refer to the comparator register
description for possible blanking signals). Then, the complementary of the blanking signal is
ANDed with the comparator output to provide the wanted comparator output. See the
example provided in the figure below.
Figure 141. Comparator output blanking
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