DC Motor Controller

[Kieran Benton]

Hi,
Was just wondering what ICs anyone would recommend for driving a 12v motor
1-2amps? Im quite inexperienced at DC motor control and need to set speed
from a PIC. Any suggestions?

Thanks, Kieran

 

In message <UOJvb.54$ld7.6@news-binary.blueyonder.co.uk>, Kieran Benton
<kieranbenton@hotmail.com> writes

Hi,
Was just wondering what ICs anyone would recommend for driving a 12v motor
1-2amps? Im quite inexperienced at DC motor control and need to set speed
from a PIC. Any suggestions?

I'd use pulse width modulation from the PIC to drive a logic-level FET
(assuming the PIC is running on 5V) and put a flywheel diode across the
motor. Choose a FET with a low RDSon at Vgs < 5V for example IRL3103 and
you won't need a heatsink on it. The diode needs to be able to handle in
excess of 2A.
--
Graham