Hmmm. The TVS wont do anything if the diodes are doing their job. The
diodes in the L6203 look good. Guess it wouldn't hurt to have the
TVS in case you had a limit switch or other switch in series with the
motor. All the best and hope if the smoke comes out you find a way of
putting it back in again!

On 22 Sep 2002 at 18:52, Jake B. wrote:

> Thanks for the replies.  I'm pretty sure the L6203 does have protection
> diodes between the source/drain of the transistors. However, I want to
> be on the safe side and prevent sparks from flying.
>
> I have been looking at this application note from microchip:
> http://www.microchip.com/download/appnote/pic18/00696a.pdf
> which uses what looks like a unidirectional TVS across the
> poles of the motor.  I think this might be a good way to go to
> supplement the L6203's built in diodes.
>
> Up till now, I've used things like the "Geckodrive" as my servo
> amplifier/controller.  This is my first crack at building my own
> simple controller... and I want to get it right. :)
>
> Thanks again.  No sparks.
> Jake

--
Brent Brown, Electronic Design Solutions
16 English Street, Hamilton, New Zealand
Ph/fax: +64 7 849 0069
Mobile/txt: 025 334 069
eMail:  brent.brown@clear.net.nz

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