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ISO1050: 2900Vdc test on ISO1050DUB interface

Zoe Yang
Intellectual 2210 points
Part Number: ISO1050
Other Parts Discussed in Thread: STRIKE,

Tool/software:

Hi team,

At present, when customer machine's strong power applies 2900V withstand voltage to the communication interface (the machine is completely unpowered), it is found that the communication chip has a certain probability of being damaged.

Rising time of 0-2900V is 5s, continue time is 5s, failing time is 5s.

Do you have any suggestions on If the chip is damaged, customer will directly replace it with a new one. If the chip is not damaged, will it have any impact on its service life? Can it continue to be used?

  • 0
    TI__Mastermind 21255 points

    Hello Zoe, 

    I am assuming that you are referring to UL 1577 withstand voltage. The ISO1050DUB package version has a smaller withstand voltage than the other package option. Viso (withstand isolation voltage) is 2500Vrms or less. A voltage of 2900Vrms is higher than the rated limit. 

    A single strike is unlikely to damage the device however the lifetime of the isolation barrier may be affected. 

    Best,
    Andrew

  • 0 in reply to Andrew Jackiw
    TI__Intellectual 1860 points

    Hi Andrew,

    Below is the condition from customer feedback. Whether this is a surge test? Not a primary-secondary isolation voltage test? And customer feedback the voltage is input from the communication port.

    Any wrong please feel free to let me know. Thanks.

    BRs,

    Francis

  • 0 in reply to Francis Jiang
    TI__Genius 10855 points

    Hi Francis,

    The table that the customer provided has a maximum voltage of 1700 Vdc which ISO1050 should be able to handle easily without any damage. I'm not sure why previously 2900 V voltage as reported. Please clarify with the customer.

    Thanks,

    Saleem Marwat