Help with an h bridge controller

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The discussion focuses on using p-type MOSFETs for an R/C car's H-bridge controller, specifically questioning the feasibility of avoiding voltage pump circuits while still enabling PWM torque control. The user has replaced n-type MOSFETs with p-types due to lower internal resistance, which is crucial for handling high current in a large 1:4 scale R/C car. There is a debate about the performance of n-channel versus p-channel MOSFETs, with some participants suggesting that n-channel devices may offer better performance. The conversation includes requests for datasheets of the specific MOSFETs being used to assess their suitability. Overall, the thread emphasizes the challenges of optimizing MOSFET selection for efficient control in high-current applications.
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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.
 
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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?
 
berkeman said:
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
 
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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.
 

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