PFC Pre-Regulator: Uses, Circuit Diagram & Resources

[kahei]

What is a PFC pre-regulator?
What is the use of it?
What is the circuit diagram in it when using buck converter?
Please post some link about pre-regulator in buck converter.
Thank you.

 

[berkeman]

What is a PFC pre-regulator?
What is the use of it?
What is the circuit diagram in it when using buck converter?
Please post some link about pre-regulator in buck converter.
Thank you.

This application note from ON semiconductor is a very good into to PFC:

http://www.onsemi.com/pub_link/Collateral/HBD853-D.PDF

It should answer your questions for you. If you don't understand something after you have read through it, post your question here.

Welcome to the PF!