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Originally Posted by Cirrussport
Sorry guys that i havent got the pictures up yet.Ive been having major problems with my camera. But out of curiousity. I noticed researching h-bridges that they usually use both p and n channel mosfets. but the victors only use n channel.
Does anyone know the advantages/disadvantages of this?
Also can anyone give me a link or explain how to build all n-channel mosfets into a circuit?
Thanks Again
Craig
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P-channel devices generally cost more and operate less efficiently than N-channel devices.
To control an all N-channel bridge, the gates of the high-side devices must be driven with respect to the motor output terminals, because that's where their sources are connected. So the gate drive circuit must include a power supply that "floats" on the motor terminal. This is often implemented using a special purpose driver IC such as
IR2104.
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