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LM3478: LM3478 on LM3481-FLYBACKEVM

Genius 14050 points
Part Number: LM3478
Other Parts Discussed in Thread: LM3481-FLYBACKEVM, LM3481, LM5155, LM5156

Hello,

My customer wants to evaluate LM3478 for flyback topology.
But we don't have any flyback EVM with LM3478.
Then they think using LM3481-FLYBACKEVM would be good idea. They understand LM3478 and LM3481 are not pin-to-pin compatible and they need some modification to replace LM3481 by LM3478 on the EVM.
Is there any concern to do it?
If you have any other good idea to evaluate LM3478 for flyabck, please let me know.

Regards,
Oba

  • Hi Oba,

    It seems difficult to replace LM3481 with LM3478 as they have different packages.

    I am wondering why the customer prefer LM3478? Why would they not use LM3481, or newer LM5155, LM5156 while we have flyback EVM.

    Best Regards,

    Feng Ji

     

  • Hello Feng,

    They have some specifc reasons for this selection. 

    I understand that it is difficult to just replace LM3481 with LM3478 on the board.
    But they will try to modify it. My intention of this question is that is there any functional problem except for repalcing implementation?

    Regards,
    Oba

  • Hi Oba,

    I think it would be difficult to determine whether there will be a problem. I would suggest to use Webench simulation to for your reference.

    Best Regards,

    Feng Ji