Originally Posted by andyew So, i m thinking if it's possible to PARALLEL 2 units of L298 to get a current rating of 4A??? If that's feasible, my cost will be REALLY cut down to double instead of 8-times more! Has any1 tried out this method? Gerry?
BTW, that Bipolar Parallel connection of Vexta PK268 has 2 very steep resonance points as compared to only 1 mild resonance point with Bipolar Series.... Is there anyway to "compensate" this disease using software??
Thanks man!
Andy |
See figure 7 of the L298 datasheet. The chip outputs can be paralleled to get more current. I haven't tried this since I gave up using l298 for driving stepper motors and designed a driver using the LMD18245 about 2 years ago. I could not completely solve stepper motor resonance issues using the L298 driver. To many wasted parts on my mill due to resonance miss steps. Switching over to a microstepping driver has completely solve that problem.
If you really want to design your own stepper driver, I recommend you look at the datasheet for a Allegro SLA7062 3amp microstepping driver chip. I recently received my samples and will be designing a board with them.
The LMD18245 is a expensive chip but there wasn't to many options available when I did the original design for my microstepping driver.
Jim
www.embeddedtronics.com