Microchip have a number of PIC chips that could be used as a controller, al=
ong with application notes to match.

IIRC there are a couple of PIC16F1xxx chips which are set up with hardware =
peripherals suitable for this. This application sounds like an ideal place =
to use them. 'All' you need is some power transistors external to the PIC t=
o drive the motor itself.





> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
> Of Andries Tip
> Sent: 12 August 2015 09:32
> To: Microcontroller discussion list - Public.
> Subject: [EE] any suggestions for stepper motor driver IC ?
>=20
> Dear All,
>=20
>=20
> I haven't been designing my own stepper motor drivers since the days of t=
he
> L297+L298 but now I find myself in the need of a stepper motor driver cir=
cuit
> and I'm hoping someone on the PIClist can help point me in the right
> direction.
>=20
>=20
> We have been using many commercial stepper motor controllers with all
> kinds of bells and whistles (micro-stepping, speed ramp-up/down, stall
> detection, selectable currents, ...) so we know what is possible but this=
 time
> we need to build such a driver/controller ourselves:
>=20
>=20
> For one of our new products we plan to use a small stepper motor with a
> lead screw for low speed (<200 RPM) precision positioning. The stepper
> motor controller needs to be integrated into the product and should respo=
nd
> to a forward pushbutton and a reverse pushbutton and to positioning
> commands through a digital interface.
>=20
>=20
> We have a 12 Volt power supply available. The stepper motor is available =
in 3
> Volt, 6 Volt or 12 Volt (with nominal currents of 0.22A, 0.11A or 0.055A
> respectively). We need limit switches on both ends. We have an FPGA that
> can program the driver IC with any settings by SPI or other interface.
>=20
>=20
> We need to have small size, micro-stepping, speed ramp-up/down and digita=
l
> control/position readout. Stall detection is not necessary. Selectable cu=
rrent,
> low idle current and overall low power consumption/heat generation is
> preferred (switched-mode power supply/pwm drive?). Cost is less of an iss=
ue.
>=20
>=20
> Does anyone have any suggestions on what device we could use ? Is an SMD
> optical transmissive sensor the best small size solution for a precision
> home/limit switch ?
>=20
>=20
> All help is much appreciated.
>=20
>=20
> Best regards,
>=20
>=20
> Andries
>=20
>=20
>=20
> --
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> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist

--=20
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