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UCC25660: LLC DC-DC with PFC on front end

Gerald Eberahrdt

Prodigy 160 points

Part Number: UCC25660
Other Parts Discussed in Thread: UCC28070

I'm looking at using the UCC25660 in a custom DC-DC application to produce 34V 1300W. In this application a PFC is required, and I have selected the UCC28070 PFC controller.

Are there any reference designs with a PFC on the frontend?

0 Manikanta Pallantla 2 months ago

TI__Genius 13245 points

Hi Gerald,

For LLC, you can refer the UCC25660 EVM which was designed for 180W. So, for 1300 W, the power stage elements, and the passives around the controller would have different values.

For PFC reference designs, my colleague should be able to help you.

Regards

Manikanta P

0 JCHK 2 months ago in reply to Manikanta Pallantla

TI__Mastermind 44220 points

HI Gerald,

Here is a 800W PFC reference design using the UCC28070. Will this help you get started?

Regards,

0 Gerald Eberahrdt 2 months ago in reply to JCHK

Prodigy 160 points

Thanks,

JCHK the 800W PFC will help a lot

0 JCHK 2 months ago in reply to Gerald Eberahrdt

TI__Mastermind 44220 points

Glad to hear it!

0 Gerald Eberahrdt 2 months ago in reply to Manikanta Pallantla

Prodigy 160 points

Manikanta

I will see if it possibles to mod the EVM to allow us to ring out the design approach.

0 Manikanta Pallantla 2 months ago in reply to Gerald Eberahrdt

TI__Genius 13245 points

Sure. Let me know if you have any further questions.

Regards

Manikanta P