UCC28070: Input three-phase full-wave rectification.

Hello Kengo,

This can be done using three isolated UCC28970 controllers, one for each phase.  Each phase will require it's own full-wave rectifier.

Regards,

Ray

Hi Kengo,

This is not three isolated rectifiers, so it will not work.  You'd need a bridge between R and S to go to one UCC28070 boost state, a second bridge between S and T to go to a second UCC28070 and a third for T and S.

Ray

Hello Kengo-san,

I believe having the three phases hooked up in the way you showed using the UCC28070 would result in a large DC offset.  Unfortunately, we don't have any reference designs of the UCC28070 being used in a three-phase application.

It is my understanding that products such as the UCC2817 and UCC2854 family of PFC controllers have been used in solutions that rectify the three phase supply (6 diode rectifier) and use the PFC controller on the DC side of the bridge, similar to what you have shown.  This is an uncommon use for our PFC controllers so I don't have any examples to share with you.