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DP83TC811S-Q1: About TRD_P/N circuits

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Replies: 3

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Part Number: DP83TC811S-Q1

Hi team,

A customer asks some questions about our application note of 100/1000base-T1. Can you please answer below?

 

1. Can you provide the detailed descriptions for below each circuit(CM Termination, MDI coupling, ESD shunt)?

2. What is the reason why 2kV rated capacitor is used?

3. The reference shcematic uses TPD1E10B06 that has low clamping voltage below 20V. Should the clamping voltage be low? The customer is just curious because they looked at using 100V clamping device in other vendor’s schematic.

 

 

Thanks,

Sam Lee

  • Hi Sam,

    Please provide the reference to the App Note to help answer the question.

    Normally clamping shall be done to ensure max input voltage spec of the pins is not violated.

    Regards,
    Geet

  • In reply to Geet Modi:

    Hi Sam,

    Please sent the app note as I do not see any reference.

    Like Geet mentioned, the holding voltage should not exceed the MAX input voltage spec.

    However, if you are using protection near the connector on the non-isolated side, you also should ensure that the FB voltage is higher than a battery short.

    Best regards,

    Ross Pimentel

    Ethernet - Applications Engineer

  • In reply to Ross Pimentel:

    Hi,

    I am closing this thread. Incase you need further assistance, please open new thread and provide reference to this thread.

    Regards,

    Geet

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