Special Attention Mike10681 / ucc28070 related

Ashutosh Sharma

Other Parts Discussed in Thread: UCC28220, UCC28070, UCC28950

I wish to use UCC28070 in a dc-dc boost converter for 1600W instead of an ac -dc pre-regulator. I made a test-zig with the details in the pdf attachment. Can you throw some light as to where I might be missing using the multiplier. Else, could you forward this attachment to technical help centre at TI.    Thanking you and with kind Regards, Ashutosh sharma.

ashutosh.shr@gmail.com

ucc28070 multipler problem.pdf

over 13 years ago

0 Mike O' over 13 years ago

TI__Guru* 85896 points

The UCC28070's multiplier does not correctly with a DC voltage at VINAC. You might try using the UCC28220/1 devices instead. These devices were made for peak current mode control interleaving and would be a better fit for an interleaved boost for a DC to DC application.

0 CWilson over 13 years ago in reply to Mike O'

Expert 1920 points

Also try the UCC28950..?

0 Mike O' over 13 years ago in reply to CWilson

TI__Guru* 85896 points

The UCC28950 is phase shifted full bridge controller. I think the UCC28070 would be a better choice for this application.

0 Mike O' over 13 years ago in reply to Mike O'

TI__Guru* 85896 points

Sorry,

I made a mistake I meant to say the UCC28220/1 would be a better choice than the UCC28950.

Regards

0 CWilson over 13 years ago in reply to Mike O'

Expert 1920 points

:-) Ok.

Yes you're right. If isolation is not required, the UCC28220 would be the best choice.

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Special Attention Mike10681 / ucc28070 related