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DRV3256-Q1: Smart gate driver failure analysis

MANUELA TESTONI
Prodigy 10 points
Part Number: DRV3256-Q1

Hello,

I am performing an FMEDA for a motor control unit using two TI smart gate drivers (PN DRV3256EPAPRQ1). I am analyzing all the failure modes leading to unintended vehicle acceleration (over torque) and I found this nice document produced by TI. https://www.ti.com/lit/an/slua963b/slua963b.pdf?ts=1687252818028&ref_url=https%253A%252F%252Fwww.google.com%252F

As can be seen from the picture, neither the failure of the smart gate driver nor the failure of the IGBT were considered as possible causes for the over torque system failure. I was wondering why. 

In other articles (for instance https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/44/e3sconf_icmed2020_01062.pdf) the IGBT short failure is considered a possible cause leading to unintended acceleration. 

Thanks in advance for your support,

Kind regards,

M.Testoni

  • 0
    TI__Mastermind 20915 points

    Hi M. Testoni,

    Since DRV3256 is covered under NDA, I am unable to discuss the specifics on public e2e. If you would like to request additional information on this device, you can click on the "Request now" button on the DRV3256-Q1 product page under the "Request more information" section.

    Regards,

    Anthony Lodi