DP83822I: Inquiry about EtherCAT ESD Issue

Part Number: DP83822I

Tool/software:

Hello~

I would like to ask about the ESD (Electrostatic Discharge) problem related to EtherCAT.

I have performed ESD tests with Air discharge (15kV) and Contact discharge (8kV).

As a result, i observed RX errors and invalid Frames in the EtherCAT diagnostic (ethercat diag).

I currently suspect that these issues are caused by ESD.

Would it be possible for you to kindly review my circuit design to check if there are any improvements i should consider? I'm sorry for sending it as a sketch.

Thank you very much for your support.

Best Regards,

  • Hi,

    The primary and secondary side of the transformer connection to the DP83822 is not correct. Pin 1 and 5 should be connected to the DP83822. Pin 2 and 4 should be connected to the common mode choke. I would also recommend to add an ESD between the DP83822 and the transformer for additional ESD protection.

    Thanks

    David