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Help with an h bridge controller

  1. Dec 20, 2006 #1
    i'm using p type mosfets for an r/c cars h bridge controller (the two n types have been replaced with p types because of thier lower internal resistance) and was wondering if there is a way to do it with out voltage pump circuits that stills alllows a P.W.M. torque controller.
     
  2. jcsd
  3. Dec 20, 2006 #2

    berkeman

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    Staff: Mentor

    So you're using p-type mosfets for the low-side switches as well?

    EDIT -- I would have thought the n-fets would have better performance. What are the devices?
     
  4. Dec 20, 2006 #3
    large 1:4 scale r/c car and use a LOT of current the difference in the internal resistance was becoming a problem in heating, and srry it was n types just i was typeing without thinking
     
    Last edited: Dec 20, 2006
  5. Dec 20, 2006 #4

    berkeman

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    Staff: Mentor

    Okay, so you want to use n-channel power MOSFETs for the high-side switches instead of p-channel. Hmmm, gotta think about that one. Do you have a pointer to the n-channel device datasheets? And maybe one to the p-channel FETs that you are trying to replace.
     
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