I'm using this particular motor driver IC to supply bi-directional current to a magnetic torque rod. I intend to control the Input A & B pins with my arduino uno, by using the PWM pins and varying the duty cycle. I also powered the IC with my arduino board and obviously got laughed at by my friends, I didn't know that arduino uno boards could only supply a maximum of around 200mA of current. So I'd like to ask:
I am planning to power the IC with a DC power supply this time, I plan to give it a Vcc of 5V, how much source current should I supply to this IC?
On the datasheet, I am not sure what the Sa and Sb (pins 1 and 4) pins are, the datasheet says they are driver output returns, but I have no idea what that means.