victor 885 parts

[Richard Wallace]

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

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.