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LM25149-Q1: IOUT difference of each phase during single-output two-phase operation

Yuta Kurimoto
Expert 8340 points
Part Number: LM25149-Q1

Hello Team,

I have a question about LM25149-Q1 dual phase operation.

Q. We use 2 units of LM25149-Q1 as single-output two-phase operation. Can I ask how much IOUT difference of each phase?

(for example, if 10A total output, the phase may shift up to 6A+4A, or 7A+3A...)

Thanks,

Yuta Kurimoto  

  • 0
    TI__Mastermind 22299 points

    Hi Yuta,

    The current sharing in dual phase can vary depending on how well the COMP and AGND nodes are coupled together.

    A closely coupled COMP and AGND will give better current sharing. 

    I can share with you preliminary results on our dual phase design when I return to lab Monday.

    Thanks,

    -Orlando

  • +1
    TI__Mastermind 22299 points

    Hi Yuta,

    I measured a dual-phase board, the current matching is around 2% (7.99A & 8.18A). This will be published as a reference design soon.

    In general the current matching should be 10% or less.

    Hope this help,

    -Orlando