The TPS23754 device provides a choice between internal fixed and programmable blanking periods. The blanking period is specified as an increase in the minimum GATE on time over the inherent gate driver and comparator delays. The default period (see the Electrical Characteristics) is selected by connecting BLNK to RTN, and the programmable period is set with RBLNK.
The TPS23754 device blanker timing is precise enough that the traditional R-C filters on CS can be eliminated. This avoids current-sense waveform distortion, which tends to get worse at light output loads. There may be some situations or designers that prefer an R-C approach. The TPS23754 device provides a pulldown on CS during the GATE off time to improve sensing when an R-C filter must be used. The CS input signal should be protected from nearby noisy signals like GATE drive and the switching MOSFET drain.