Alternate 3 pin dual motor drive?
October 12, 2010
I know enough to be dangerous to components.
I had thought about using 2 4427 MOSFET drivers and tying one input from each driver together to a single uC pin. I could then control fwd/rev with two digital pins and put a pwm signal on the shared pin. The 4427 data sheet says the input current is 10uA per pin and PIC pins are supposed to be able to source 25mA max. Is there a flaw in my thinking?
As far as a schematic, I imagine many of you have seen what David Cook has posted on his RobotRoom site.
As an aside, Mouser doesn't carry much in the way of 4427s, but, they are getting ready to carry a similar product w/ a 4A max current load vs the 1.5A of the 442x line. It is the IXDx604 series of MOSFET drivers.