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  1. #1
    Full Member level 4
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    Film capacitor

    What is the advantage of film capacitor??

    Why people use it in charge pump circuit??

    Thanks for your help.

    •   Alt26th July 2004, 06:01

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  2. #2
    Junior Member level 2
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    Re: Film capacitor

    Why people use it in charge pump circuit??
    Good response to current transients (during rapid charge/discharge
    cycles when PLL is locking). Compare PLL settling times if a
    X7R capacitor is used in a loop filter : slower settling than with
    film..

    Capacitance vs. Temperature change is small like C0G.

    Piezo-electric effect is low : lower spurious due to vibration than
    when using a ceramic capacitor.

    Downside is that the film-capacitors are not quite as robust as
    ceramic ones : melt easily if touched with a soldering iron !



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