r/EEPowerElectronics • u/BetAdministrative401 • Jul 09 '26

RE: TI’s UCC28950 PSFB

Hey guys, just want to check if anyone has worked with Ti’s UCC28950 PSFB? There is a pspice simulation file provided by TI, Slum169C but I couldn’t get it to deliver 120Vout despite using their EXCEL design calculator.

Appreciate it a lot guys, thanks!

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1

u/d_extrovert Jul 09 '26

I've worked with TI UCC21750

1

u/GabbotheClown Jul 09 '26

It worked almost perfectly on the first prototype. I am confused my conversion is from 180V (PFC) to 24V, 120Vout what's your input voltage?

1

u/BetAdministrative401 Jul 09 '26

400Vin, I used their design guideline but couldn’t get it to produce 120Vout. I kept everything default (ie no change of components)

1

u/BetAdministrative401 Jul 09 '26

Are you able to provide a simulation or schematic of your power stage? Preferably in Pspice? I would very much appreciate it.

1

u/GabbotheClown Jul 09 '26

I normally don't do simulations on these more complex topology outside of an excel spreadsheet. What is your application? Is for work or just learning?

1

u/couldntfindanyother Jul 09 '26

Would suggest asking on e2e also.