I have two questions about PFC control problem.
1.) For PFC application, the current loop bandwidth needs to be high.But I don't understand why voltage loop bandwidth needs to be slow.What's the impact of voltage loop bandwidth is very high.
2.) PFC output voltage includes double line frequency, if we do the feedback control the system will grab the double line voltage, in this situation how to avoid this happening.Because all I want to know is a constant voltage.