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  • Author Author: rscasny
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Do You Know Enough About Polymer Capacitors to Use Them on the Job?

Do You Know Enough About Polymer Capacitors to Use Them on the Job?

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  • in reply to dougw

    I've used them in switching supplies and other similar applications where you need very low ESR and high capacitance.

     

    Much nicer than Tantalum (and don't burst into flames) but generally lower ESR and cost.

     

    Used many in // in a 3.3V 20A supply  - much cheaper than adequate values of ceramics.

     

    I keep a stock of various values like this Farnell 2614089 - radial leaded because the SM ones are a pain to solder.

     

    MLCC have lower ESR but so what if you can't get them image

     

    (Although I do wonder if the Polymer suppliers can take the strain of a mass switchover.)

     

    MK

  • in reply to dougw

    Like Douglas,  I'd like to know of any design rules that can catch you out in critical situations, particularly in switching supplies and filters.