geekEE
Electrical
- Feb 14, 2005
- 412
Does anyone have any tips or links to info on designing a PWM interface for a DC motor in order to reduce EMI? I've got a tiny fan (less than 50mA current draw). I plan on driving it with a PWM output using a PNP transistor on the high-side. I figured that I would put a backwards diode across the motor. Anything else that I should consider? A capacitor? An RC snubber? Ferrite beads? Are these things bad sources of EMI or am I being overly cautious?
Thanks in advance.
Glenn
Thanks in advance.
Glenn