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ADUM4135 false FAULT signals latches device off

Question asked by Ducnanm on Jun 16, 2017
Latest reply on Nov 16, 2017 by RSchnell

ADuM4135 going into error unexpectedly | EngineerZone 

 

 

  • We are using 4 off ADUM4135 in a power converter full bridge circuit, and are  seeing occasional FAULT signals, even though the DESAT pin is tied to GND2.

     

    We have VDD2 at 20V and VSS2 at -4V to drive SIC MOSFETs.

    Adding more decoupling right at the VDD2 pins didn't help, so we suspect some sort of radiated noise issue.

     

    To minimize some of the effects, we are considering linking the /FAULT and /RESET pins - any comments/ issues with that?

     

    Any support much appreciated.

     

    Thanks

     

    DM

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