Dear support member,
My customer used UCC28063A.
I have a question.
When AC interruption occurs from the state of normal operation and the PFC voltage falls below the PWMCNTL threshold,
I would like to switch the PWMCNTL terminal from GND potential to open.
Is there any problem in usage?
When AC interruption occurs, VINAC is fixed to GND.
I am concerned if the operation switching from the PFC control state will not affect the operation of the PWMCNTL pin.
(According to datasheet)
GND potential at or above the PWMCNTL threshold of the HVSENSE pin that is dividing voltage.
Open at or below the PWMCNTL threshold of the HVSENSE pin that is dividing voltage.
If you look at the block diagram, it seems that operation is switched from PFC control state.