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UCC24612: negative spike on VD and VG pin of UCC24612-1

Given Ding
Genius 10205 points
Part Number: UCC24612

Hi Team, 

During test, we use short ground line to test the voltage and find there is negative spike on VD and VG pins,  -3V/<10ns.  

Since datasheet only have -0.3V spec, please kindly check if it's OK and if there is transient spec.  

Thanks. 

BRs

Given 

  • 0
    TI__Guru* 86286 points

    Hello,

    The voltage spike seems high to be at 3V.  The FET body diode should clamp this voltage from ever getting to -3V.

    I would suggest retaking this measurement tip an barrel with the scope probe wire rapped around a ferrite toroid to make a common mode filter.

    The maximum rating on the VD pin should be -0.7V minimum and not -0.3V.

    If this failure ends up being real you can prevent with Schottky diodes.  One across the SR's body diode and the other and to VS and cathode to VG.

    Regards,