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UCC28951-Q1: PSFB controllers UCC28951-Q1 vs UCC2895-EP PWM controller vs secondary side controller

Connor Connaughton
Expert 4470 points
Part Number: UCC28951-Q1
Other Parts Discussed in Thread: UCC2895-EP, UCC2895

Hello,

I would like to find out about differences and advantages of two distinct TI controllers . One is Primary side UCC2895 with opto, and the another is the UCC2895-EP secondary Side controller for PSFB topology. Any insight is appreciated!

Thanks,

Connor

  • 0
    TI__Guru 72245 points

    Hello,

    Opto is required for primary side operation and galvanic isolation.  If you don't need Galvanic isolation then it is ideal not use opto feedback.

    Opto isolators always present a reliability issue and some customer prefer not to use them and control the FSFB on the secondary side of the controller.

    Regards,