Help with an h bridge controller

[rockstar]

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 their lower internal resistance) and was wondering if there is a way to do it without voltage pump circuits that stills alllows a P.W.M. torque controller.

 

[berkeman]

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?

 

[rockstar]

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?

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

 

[berkeman]

Okay, so you want to use n-channel power MOSFETs for the high-side switches instead of p-channel. Hmmm, got to 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.