Hi,
UCC28070 is being considered as a circuit for the three-phase Full-wave rectification PFC.
I understand that UCC28070 does not support DC input because
the IC needs to set the correct multiplier level using the VINAC input.
I have the following question.
1. What level is the correct multiplier level set to when the IC starts?
2. Can we set the correct multiplier level by dropping the VINAC input below 0.7V from the outside?
For example, can we set the value multiplier level by pinning Vsense low
when the IC starts and dropping the VINAC input below 0.7V at that time?
3. How long do the IC needs to drop below 0.7V to set the multiplier level?
4. Is there a need for to set the multiplier level by dropping the VINAC input below 0.7V in every cycle?
Thank you.
