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  • TI Thinks Resolved

ISOW7841: can't pass EMI test

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

  • 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

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