re:L298 current spec

Thanks Randy,My $.02:

As the table says, the MAXIMUM DC output is 2A per channel(stepper winding).
And although that spec says 50V power supply, you had better be SURE that your
system will NEVER get above this, and the lower the voltage you can work with,
the better. Good board design WILL let you run these things at 40V. GOOD HEAT
SINKS ARE A MUST!! Fan - cooled too.

I've always used a 24VAC Xfrmr, bridge rectified, 40Kmfd filter cap, for about
34VDC. And my drives auto-idle when the step pulses stop... MANY people HATE these
chips, but they work fine for many others...

DO respect that max Vs though! And don't forget about the "generator effect" of a
stepper "back-driven"!

Hope this helps.

Ballendo

>I see a possible problem here, could some of you that are more
>familiar with the 298 chip set confirm if the current drive of this
>chip is 2 amps not 4 amps.
>>I'm not familiar with the L298 chip, but just printed out the application
>>notes yesterday because the Dan Mauch 2A driver kit I recently built uses
>>it (and I like to have documentation on all my stuff...)
>>The ABSOLUTE MAXIMUM RATINGS table says:
>>Io Peak Output Current (each channel)
>>-Non Repetitive (t=100us) 3A
>>-Repetitive (80%on-20%off; t on=10ms) 2.5A
>>-DC operation 2A
>>Also
>>Vs Power Supply 50V
>>Vss Logic Supply Voltage 7V
>>Best regards,
>>Randy