Driving a 3v dc motor

[marsten]

Hi,

I'd like to drive a small 3V motor with a mosfet driver ic, but couldn't find a proper one. I'm looking for something like MAX4420, but with lower supply voltage.

 

[jbartos]

Suggestion: Visit

http://www.thomasregister.com

and type Transistors: MOSFET under Product or Service, which will return 21 companies to approach to

 

[ijl]

One possible solution would be to use a discrete MOS-transistor to drive the motor and a separate control electronics to drive the MOS-transistor.

You should (probably) also have a DC-DC converter to increase the voltage of the control electronics. A higher gate voltage allows the MOS to be properly 'on'.

Note also that the 1.5 ohm output impedance of MAX4420 seems to be a bit high to drive a motor.

 

[jbartos]

Suggestion: Visit

http://www.microchip.com/download/appnote/devspec/17cxx/motion/00898a.pdf

http://www.nelnickrobotics.com/motorcontrol.html

etc. for more info