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Original question:

DRV8353RS-EVM: Gate Drive Fault (GDF)

DRV8353RS-EVM: Driver fault; device and 3.3V regulator hot

Jed Hewitt
Prodigy 55 points
Part Number: DRV8353RS-EVM
Other Parts Discussed in Thread: DRV8323

Hi,

I am also having fault issues with the DRV8353-EVM.  We ran the motor ID process successfully a few times with a maxon motor with hall sensing.  At some point, the fault was tripped permanently in the driver chip and we can't run the motor.  The driver chip and the 3.3V regulator now heat up immediately upon power-up (bus current = 200mA idle), so it looks like I would have to replace the driver to get the EVM running again.

My main question is if the DRV8353 will be robust enough for our application, seeing as it failed at or below 24V and never drove the small Maxon motor more that 1.5A per phase (usually 500mA or less).  Secondarily, I came to the forums to get a better idea of what parts to order now as I troubleshoot, since we are on a schedule.

We are evaluating the driver and FETs so we can run the bus voltage at 60V max comfortably, because the DRV8323 we are using now has thermal runaway issues when operating above 24-30V.  We were running this DRV8353-EVM mostly at 12V with the exception of a couple times at 24V.

Thanks,

Jed

  • 0
    TI__Guru 65460 points

    Jed,

    Thanks for reposting the question!

    The motor ID process is sensorless, it does not have a sensored option.

    What changes were made to the EVM in order to run it as sensored?

    Regards,

    -Adam

  • 0 in reply to Adam Sidelsky
    Prodigy 55 points

    Hi Adam, No changes were made to the EVM other than removing R19 and populating R18 for single-ended supply.  We plugged the motor's hall sensors into hall connector, J3, and saw activity on the corresponding indicators when running the module.

  • 0 in reply to Jed Hewitt
    TI__Guru 65460 points

    Jed,

    I am not sure the implications of running the sensored code with the sensors attached, I would recommend using the EVM as sensorless with your own sensorless code or using it without hall sensors and the included sensorless FOC from Instaspin.

    Once you replace the IC, please use this version of the GUI and make sure to select the minimum IDRIVE: https://dev.ti.com/gallery/view/5063756/DRV8353Rx/ver/1.0.0/

    Some motors can have issues with the 1.0.1 GUI because it locks the IDRIVE at the 150/300mA setting which might be too much for the EVM's on board FETs and can damage the DRV.

    Regards,

    -Adam