UCC28951: Design help for 2.8kW power solution

ArTzy

Part Number: UCC28951
Other Parts Discussed in Thread: UCC39002, UCC29002

Hi Experts,

Seeking your assistance on this query from Cx:

We are in designing of a 48VDC to 12V dc converter, the power output is 2.8KW. We are planning to use PSFB topology & selected UCC28951 Phase-Shifted Full-Bridge Controller.

One of our major requirements is current sharing/load sharing. So, for that purpose, we are planning to select UCC39002. But now my doubt is that, shall we able to use UCC39002 with UCC28951?

Thank you.

Regards,
Archie A.

over 1 year ago

0 Mike O' over 1 year ago

TI__Guru 66135 points

Hello,

I am reviewing your inquiry and will get back to you shorty.

Regards,

0 Mike O' over 1 year ago in reply to Mike O'

TI__Guru 66135 points

Hello,

Are you try trying to just make parallel supplies share current or are you doing a modular design?

Regards,

0 Mike O' over 1 year ago in reply to Mike O'

TI__Guru 66135 points

Hello,

You resubmitted this inquiry without answering my question. Could yo please answer it so I can provide the correct support.

Regards and Thanks,

0 ArTzy over 1 year ago in reply to Mike O'

TI__Genius 13999 points

Hi Mike,

Responded:
We are designing a power supply unit that is capable of paralleling with similar units. That is the power supply should have an inbuild load sharing/ current sharing feature.

Regards,
Archie A.

+1 Mike O' over 1 year ago in reply to ArTzy

TI__Guru 66135 points

Hello,

Thanks for letting me know. Because if you were not doing a modular design there was a technique that does not require the UCC29002.

When it comes to designing the UCC28951 power stage the following link will bring you to an application note that goes through the step design process of designing a phase shifted full bridge. The application note also discusses in detail how to setup the UCC28951 controller including. Within this application note is a link to an excel design tool that uses the same calculations in the application note.

https://www.ti.com/lit/pdf/slua560

If you want more of hands off approach there is a Webench tool where you enter your input and output power requirements and the tool will generate a schematic and bill of material (BOM) for you. You can find this tool at the following link. However, the Webench tool is at the bottom of the page.

https://www.ti.com/product/UCC28951?keyMatch=UCC28951&tisearch=search-everything&usecase=GPN#tech-docs

In regards to the UCC29002 load share controller. This device was designed to adjust the feedback loop in modular designs. There is an excel design tool that you can find in the following link. If you have issues with the UCC29002 please post in a separate link so the appropriate applications engineer can help you in your design process.

https://www.ti.com/lit/zip/sluc684

If this resolved your issue please select resolved at the end of the thread.

Regards and Thanks,

+1 Mike O' over 1 year ago in reply to Mike O'

TI__Guru 66135 points

Hello,

Just checking in. Did this resolve your issue? If it did could you please check resolved at the end of the thread?

Regards and Thanks,

0 ArTzy over 1 year ago in reply to Mike O'

TI__Genius 13999 points

Yes, Mike.

Thank you very much for your expertise!

73,
Archie A.

0 Mike O' over 1 year ago in reply to ArTzy

TI__Guru 66135 points

Hello,

I was glad that I could help.

Mike

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UCC28951: Design help for 2.8kW power solution