Which type of CCM PFC is best@

[grizedale]

The following app note states (on page 4) that there are two types of CCM Boost PFC.........


https://www.fairchildsemi.com/an/AN/AN-42047.pdf


one Type is Average current mode CCM PFC
the other type is input current waveshpaing.

Supposing that the actual load is highly transient in nature...then which of the two methods is the best?

 

[atripathi]

I think both are same from "PFC" perspective, The input current shaping method does not need to sense input voltage, and same information is indirectly derived. From a transient load perspective, they both may be same.