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LM5143-Q1: Pi Filter

Zehui Li
Intellectual 440 points
Part Number: LM5143-Q1
Other Parts Discussed in Thread: LM5143

Hi,

  If I use more than one LM5143 and the input is the same VBAT. Should them share one Pi filter or use individual PI filter for each device?

  • +1
    TI__Mastermind 29380 points

    Hello Zehui,

    If the converters you are using are not synchronized by a clock, then I would use separate input filters to avoid beat frequency interactions between the two switching converters.  If all the switchers are clock synchronized, then I would use a single filter.  

    Hope this helps.

    David.