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LP8866-Q1: Question about "Spread Spectrum Frequency range" and "Spread Spectrum Modulation Frequency"

Yuta Kurimoto
Genius 10655 points
Part Number: LP8866-Q1

Hello Team,

I'm Yuta Kurimoto TIJ FAE.

Q. I would like to know the guideline how to decide the register of SPREAD_RANGE and SPREAD_MOD_FREQ. Can you let me know the meaning of them?

In my understanding, SPREAD_RANGE equals "2Δfc", SPREAD_MOD_FREQ equals "fm" as written in below application note. Is it correct?

https://www.ti.com/lit/an/snva974/snva974.pdf?ts=1593769361622&ref_url=https%253A%252F%252Fwww.google.co.jp%252F

Q. Can you let me know the pros/cons of higher/lower SPREAD_MOD_FREQ.

Thanks,

Yuta Kurimoto

  • 0
    TI__Genius 11836 points

    Hi Yuta,

    Q. I would like to know the guideline how to decide the register of SPREAD_RANGE and SPREAD_MOD_FREQ. Can you let me know the meaning of them?

    In my understanding, SPREAD_RANGE equals "2Δfc",

    No. Please refer to the following table.

    SPREAD_MOD_FREQ equals "fm" as written in below application note. Is it correct?

    Yes.

    Q. Can you let me know the pros/cons of higher/lower SPREAD_MOD_FREQ.

    I think this question is already described in the link you provided.