• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 15 subscribers
  • Views 695 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

ISOW7841: can't pass EMI test

ISOW7841: can't pass EMI test

Alex Chen9
Expert 1075 points
Part Number: ISOW7841

HI SIR

I known the ISOW series have the EMI issue, need the special layout for it.

If i add more isow parts in one board,does the issue will hard to solve?

thanks

  • 0
    TI__Mastermind 49475 points
    Hi Alex,

    Thank you for your interest in ISOW.
    Since ISOW implements spread spectrum modulation onto the switching frequency of the DC/DC converter integrated in ISOW, the frequency is spread to a band of frequency and is not at a single frequency. Due to this reason, frequencies from different devices do not generally be at the same frequencies and hence they don't add-up directly.

    The overall emissions due to multiple devices can be slightly higher than a single device but it wouldn't directly multiply by the number of devices.

    I hope this gives clarification that you were seeking. Thanks.


    Regards,
    Koteshwar Rao