UCC28950: transformer calculator from app note

Eze Bayer

Part Number: UCC28950

Hello, I'm designing a DCDC circuit with ucc28950. I used as reference an TI app note but I think that the transformer has error in the parameters It says hand made transformer. Could you say me the correct wire parameters of the transformer using the same nucleo?

I attach the TI app note.

Thanks

0763.DC-DC.pdf

over 4 years ago

0 Mike O' over 4 years ago

TI__Guru* 86266 points

Hello,

Could you tell me which application note you are referring too?

Regards,

0 Eze Bayer over 4 years ago in reply to Mike O'

Prodigy 150 points

Sorry, I only found this reference design from TI, not the app note, i was wrong. Could you help me? Thanks

0 Mike O' over 4 years ago in reply to Eze Bayer

TI__Guru* 86266 points

Hello,

I have attached an application note that goes through step by step how to design the UCC28950 in a PSFB.

1440.UCC28950 600-W, Phase-Shifted, Full-Bridge Application Report (Rev. C).pdf

Regards,

0 Eze Bayer over 4 years ago in reply to Mike O'

Prodigy 150 points

Thanks, I already have the design, and simulated with TINA, my problem is the design of the transformer for output 24VCC 25A, because i didn't find a commercial one with ratio 1:12+1:12, I need made it by hand, like the reference design that I attached in the first message, could you help me with any other example for my app to make the transformer?

0 Mike O' over 4 years ago in reply to Eze Bayer

TI__Guru* 86266 points

Hello,

Texas Instruments does not design magnetics. However, Mag-Inc has many application notes that describe core and wire selection for design magnetics. The following link will bring you to the mag-inc web site. https://www.mag-inc.com/

When I do power supply designs I use companies like Renco, Wurth and GCI to design the magnetics for me. You just need to give them the turns ratio and winding RMS currents and they do the rest for you.

Regards,

0 Eze Bayer over 4 years ago in reply to Mike O'

Prodigy 150 points

Hello, I asked in some of those companies but the minimum amount to buy is too great for the step of my project. That is why I was interested in the design that I found in IT, because the transformer was similar to the one I need, but the transformer data looks bad, if you do not know more about that design there is no problem, I will try to ask again in some of these companies of transformers. Thanks for your answers

0 Mike O' over 4 years ago in reply to Eze Bayer

TI__Guru* 86266 points

Hello,

I still think Mag-Inc may be a good option for you. Give the applications note a shot.

Regards,

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UCC28950: transformer calculator from app note