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DP83822 EVM can't pass ESD test

Tan Sun
Intellectual 1810 points


My customer use DP83822 EVM for evaluation. They were found EVM can't pass ESD test.

IEC LEVLE 2(Contact 4kv) and IEC LEVEL 4(Contact 8kv) . LED will blink, that means IC been reset. Customer's request is can't be reset during test.

Test photo as below:

Any suggestion can be provided?

  • 0
    TI__Mastermind 23675 points

    Hi Tan,

    Have you ensured that the chassis is grounded (I.e. The standoff near the rj45 is grounded)? Also ensure that the system ground (i.e. Other 3 standoffs) are not directly tied to the same plane as the rj45. What supply are you using and link partner? I would not recommend a usb supply because a usb supply might not be able to handle the event. Have you tried connecting two 822 evms together to make sure it isn't the link partner?

    Also, please clarify, a link drop (ie Led blink) is different from a phy reset. Please let me know if it is a link drop or reset.

    Kind regards,

    Ross

  • 0 in reply to Ross Pimentel
    TI__Intellectual 1810 points

    Hi Ross,

    Thanks for your comment.

    I will check them with customer.

    But just get a clarify from you, if this EVM also can pass ESD LEC LEVEL 4 testing?

    I think if testing is a popular item when customer evaluating, a test guide line will make customer's process easier.

    Thanks!

  • 0 in reply to Tan Sun
    TI__Mastermind 23675 points
    Hi Tan,

    We have done our own testing on this EVM up to 8kV (IEC61000-4-2). It appears to be a setup issue they are having because it does not mimic how we performed ours.

    Kind regards,
    Ross