Re: L297/L298 And a "correction"

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ballendo" <ballendo@...> wrote:

>
> >In CCED, "Wayne C. Gramlich" <Wayne@> wrote:
> >This was written about 2 years ago, so it is possible that some new
> ><$10/axis integrated MOSFET solution has been deployed. I certainly
> >am not aware of any, but I haven't beeen looking recently.
>
> Wayne,
>
> The Sanken Chips sold by Allegro are under your price point, and
> perform very nicely. The "problem" is that Sanken has been of
> a "unipolar" mindset for many years.
>
> I only wish Sanken and STS could run into each other (Reeses like)
> saying,"Hey! you got microstepping in MY bipolar?!?
>
> "Yeah?, Well you got bipolar in MY microstepping"
>
> The STS L6208 with Sanken's uStep translator would be a nice chip
> IMO. (or an SLA7078 with bipolar outputs; even better!)
>
> Until then, the choice seems to be two LMD18245's or the Sanken chips
> for 3amp drives...

Ballendo:

The LM18245's are pretty expensive. By breaking out
the DAC's and comparators, it is possible to use
a L298 instead of an LM18245. The L298 can be configured
to tie both internal H-bridges together to form a single
H-bridge rated at 3.5 Amps I saw one person out there that
built such a critter (I can't remember the URL tho'). It
would only be rated for 48V instead of 55V tho'.

-Wayne