UCC28951: can this part supports up to 6kW application

Kelly Bai

Intellectual 1330 points

Part Number: UCC28951

Hi team,

For input voltage 36-72V, output voltage 540V, 6kW isolated solution, which topology is suitable here?

Can our UCC28951 FSFB support this application?

Can you help recommend a solution for me?

Thanks.

over 4 years ago

0 David Huang33 over 4 years ago

TI__Genius 9140 points

Hi Kelly,

an expert will look into this post.

0 Mike O' over 4 years ago in reply to David Huang33

TI__Guru* 85616 points

Hello,

The UCC28951 can be designed for high power applications due to its ability to zero voltage switch.

I have seen UCC28951 used in applications up to 2 kW. In a 6 kW application you could run 3 in parallel.

The following link will bring you to a 2 kW reference design.

Regards,

0 Kelly Bai over 4 years ago in reply to Mike O'

TI__Intellectual 1330 points

Hi Mike,

thanks for your suggestions.

but my concern is whether this PSFB topology can support input 36-72 V ，output 540V such a high boost application?

thanks.

0 Mike O' over 4 years ago in reply to Kelly Bai

TI__Guru* 85616 points

Hello,

You should be able to this by properly selecting the transformer turns ratio, your input range is 2 to 1. So that is O.K.

UVLO for the UCC28951 is 7.2V so that would be O.K.

Most of the designs I have worked on are step down and not step up. If you don't require isolation you could do this with a boost converter. However, you won't have over load protection with a boost.

Regards,

Power management

Power management forum

UCC28951: can this part supports up to 6kW application