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SM72295: Recommended Pin Configuration when not using Current Sense Amplifiers

Michael Richter91
Prodigy 10 points
Part Number: SM72295

Dear TI Community,

I would like to use the SM72295 Full Bridge Driver in my new magnetic bearing amplifier design. Current measurement is done by a discrete device thus I don't need the two current sense amplifiers.

What is the recommended pin termination in this case. Do I leave all related pins (SIA SIA IIN BIN SOB SIB IOUT BOUT) floating or do I tie them to GND except for BOUT and BIN?

Thanks very much for your Help!

Kind regards, Michael

  • 0
    TI__Genius 13445 points
    Hi Michael,

    Pins SIB, SOB, SIA, SOA, IIN, IOUT should all be tied to AGND since you're not using the current sensing features of this device.

    Happy Holidays!

    Regards,

    -Mamadou
    Applications Engineer, HPD
  • 0
    TI__Genius 12990 points

    Hi Michael,

    I am an apps enginner for HPD also working with Mamadou and SM72295, I am curious exactly how you are using SM72295 in your magnetic bearing design?

    Could you possibly tell me some of you design constraints? or show me a snippet of where the SM72295 is being used in the schematic?

    Thanks