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TPD1E05U06: IEC61000-4-x

Michiaki Tanii
Expert 4340 points
Part Number: TPD1E05U06

Hi

Some IEC61000-4 is defined by voltage (xx kV etc) but in the datasheet, it is defined by current with resister as following.
Why does the such measurement method applied to ?

And how is it measured for surge ?

Thank you and best regards,
Michiaki

  • 0
    TI__Genius 12410 points

    Hello,

    For both IEC61000-4-2 (ESD) and IEC61000-4-5 (Surge) there is a source voltage and an associated series resistance. For IEC61000-4-2 it is 330 ohm and the industry typically just refers to the source voltage level. For IEC 61000-4-5 the source impedance can be 2 ohm (defined in the standard for power lines), 12Ohms (transmission lines), or 42 ohms (coupling onto signal lines). Therefore going by the current is best option for surge because a 1kV surge pulse can be several difference currents going through the device depending on your source impedance.

    For more information about the standards see

  • 0 in reply to Cameron Phillips
    TI__Expert 4340 points

    Hi Cameron,

     

    I understood IEC61000-4-2 and IEC61000-4-5 but could you kindly advise on IEC61000-4-4 ?

    In the datasheet, for IEC61000-4-4 EFT protection, it is specified by the current that is up to 80A and the condition is 4kV with 50 ohm impedance.

     

    Why is it put 50 ohm for IEC61000-4-4 test ?

     

    Thank you and best regards,

    Michiaki

  • 0 in reply to Michiaki Tanii
    TI__Genius 12410 points

    Hello,

    You will have to read the standard to understand that as I am not sure why they defined it as 50ohm source impedance. However it is not much more energy than ESD because the pulse is so quick that almost all of our ESD devices have protection up to 80A for EFT.