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DRV8312: Detection of missing BOOT_Cap

Mark Pearson
Genius 12705 points
Part Number: DRV8312

Motor Gurus - one of my customers is wanting to know if there is a way to detect if one of their Boot-Caps is missing on their design (any one of the caps connected from the SW (OUT_A/OUT_B/OUT_C) node to the boot-pin (BST_A/BST_B/BST_C).

They apparently noticed that their unit had one boost cap missing and seemed to work at light loads... and failed at heavier loads.  Basically, they don't want to ship a defective unit if they can help it.

Thanks

  • 0
    TI__Guru 65450 points
    Mark,

    On a basic level, no, if the BST_UVP is not being triggered, we don't have a great way to detect this. The only thought we have is to intentionally leave the HS FET on for an extended duration and check the discharging of the BST node.

    Regards,

    -Adam