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UCC21710-Q1: Does a negative power supply voltage must have to be applied between COM and VEE?

user6133225
Prodigy 40 points
Part Number: UCC21710-Q1

1
If there is no negative voltage, will the chip report fault signal?
2 if there is no negative voltage,Internal on-chip Active Miller Clamp will not be able to use this function, right?
VEE and CLMPI pins need to be suspended

  • 0
    TI__Expert 4875 points

    Hi,

    Thanks for your questions.

    1. There does not have to be a negative voltage applied to VEE. If you do not wish to use a negative voltage rail, then COM and VEE must be tied together. All functionality of the driver is still available in this case (including fault reporting).

    2. The Active Miller Clamp can still be used when VEE is tied to COM (and there is no negative voltage). The Miller Clamp internal will still provide a low-impedance pathway for the current to flow in case of a high dv/dt event while the device is turned off. If you are not using the internal Miller Clamp, then it is best to tie CLMPI to COM.

    Please hit the green button if I have answered your questions!

    Regards,

    Audrey