Hi All,
Designing PFC/LLC power supply. PFC stage controller is powered from RVCC output of LLC controller. During startup when RVCC turns on voltage on BLK pin is below BLKstop threshold (PFC is just starting).
Is BLKstop ignored at this point? As PFC starts up, the voltage will rise above BLKstart and the LLC will start switching. Is this when BLKstop becomes active?
-Stuart