Re: [CAD_CAM_EDM_DRO] L297/L298

This is a really old thread, but I am just catching up on my email and
wanted to add my 2c, for the record:

The one advantage of L297/L298 solution is that you can chain several L298
chips in parallel. You can't do that with an LMD18245. Yes, the PCB routing
gets hairy pretty quickly, but it can be done, and it works. I am currently
using boards utilizing that very method - 3 L298 chips in parallel per axis
driving stepper motors with 5A per axis (
http://www.krupin.net/serendipity/index.php?/archives/56-PCB-making-the-automation-part.html
).

Of course, one could argue that if higher currents are needed, one should
just go with discreet FETs anyway, and I wholeheartedly agree, but that's a
different topic. The point is that, in a pinch, you could get some extra
power out of a L297/L298-based solution, and it is a remarkably simple
circuit.

Vlad

On 8/4/06, Alan Marconett <KM6VV@...> wrote:
>
> HI Phil,
>
> It's an old part! Check out the Semiconductor LMD18245 and the EAS
> website
> I posted.
>
> Alan KM6VV
>
> > I've been experimenting with various designs for bipolar stepper motor
> > drivers and I'm curious if anyone has had a similar experience. Is it
> just
> > my perception or is the L297/L298 combo a piece of junk? It seems no
> > matter
> > how I configure it the thing just runs way hot if it carries anything
> near
> > its rated current.
> > --
> > Phil Mattison
> > http://www.ohmikron.com/
> >
>
>
>
>
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--
Vlad's shop
http://www.krupin.net/serendipity/index.php?/categories/2-metalworking


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