UCC28951: CC/CV MODE FULL LOAD ISSUE

Carson Hsu

Part Number: UCC28951
Other Parts Discussed in Thread: UCC28950,

Dear Sirs

I cannot achieve my expected output voltage and current with the Tina model, could you help suggest how to adjust circuit parameter?

Vin:500V

Vout:14.4V

Iout:278A

The Tina model is shown below

UCC28950 and UCC28951 TINA-TI Steady State Reference Design Current doubler.TSC

over 3 years ago

0 Mike O' over 3 years ago

TI__Guru* 85616 points

Hello,

There is a Webench design tool that you can use to verify your design. You can find on the following web page just search for Webench.

https://www.ti.com/product/UCC28951

The following link will bring you to an application note that shows how to design with the UCC28950. This application note is good for the UCC28950 it also may help you in troubleshooting your design.

https://www.ti.com/lit/an/slua560c/slua560c.pdf

Getting a hold of the UCC28950 EVM and evaluating it's performance can help you with understanding how the PSFB works. You can find information on this EVM and how to get it to work with the UCC28951 at the following two links. Please note you just need to swap out the UCC28950 in the EVM with the UCC28951.

https://www.ti.com/lit/pdf/sluub02

https://www.ti.com/lit/ug/sluubj5/sluubj5.pdf

The following link explains the differences between the UCC28950 and UCC28951.

https://www.ti.com/lit/pdf/slua853

Regards,

Power management

Power management forum

UCC28951: CC/CV MODE FULL LOAD ISSUE