Technical Support and Design Advice...

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Shawn

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corbin.sl over 13 years ago

need an h bridge solution for my robot, thought i had it made with the drv8829evm but it doesnt seem to be able to provide adequate starting current. need about 10-15 amp rating preferably in a dip package and made by TI. Any suggestions are welcome.
Shane Corbin
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corbin.sl over 13 years ago

need an h bridge solution for my robot, thought i had it made with the drv8829evm but it doesnt seem to be able to provide adequate starting current. need about 10-15 amp rating preferably in a dip package and made by TI. Any suggestions are welcome.
Shane Corbin
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vsluiter over 13 years ago in reply to corbin.sl

Hi Shane,

DRV8432 looks like the most beefy driver chip, with 14A rating (drivers in parallel).
If you have the DRV8829 you could try to do something which voids all warranties but might help you through the startup current, and that is to place a small capacitor over the current measurement resistor. This way small high-current peaks are not measured. Do remember that they DO run through your driver IC!
I once had a problem with a non-TI part that tripped over a <100us current peak. Unfortunately no external current measurement, so I had to look for another driver....
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ssilberhorn over 13 years ago in reply to corbin.sl

Hi Shane and Victor, yes you are correct the DRV8432 DRV8432 is the best option but we don't have any in DIP packages.
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