UCC28070 300W Interleaved PFC

In higher power applications to utilize the full line power and reduce line current
harmonics PFC Pre-regulators are generally required. In these high power applications
interleaving PFC stages can reduce inductor volume and reduce input and output
capacitor ripple current. This results in smaller overall magnetic volume and filter
capacitor volume increasing the converters overall power density. This is made
possible through distributing the power over two interleaved boost converters and the
inductor ripple current cancellation that occurs with interleaving, reference [5]. This
application note will review the design of a 300W two-phase interleaved power factor
corrected (PFC) pre-regulator. This power converter achieves PFC with the use of the
UCC28070 interleaved PFC controller, reference