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TAS5720A-Q1: TAS5720A-q1 EMC issue

Elec Cheng
Expert 7055 points
Part Number: TAS5720A-Q1

Hi Expert,

our customer use TAS5720A-q1 and has some EMC issue. it performs bad at 97.9MHz under RE test. they have few things to confirm:

1. Does TAS5720A-q1 have spread frequency function and slewrate setting?

2.As for DC filter, can adjusting register 0x02 lower internal energy and improve EMC performance?

Thanks a lot!

BR,

Elec Cheng

  • +1
    TI__Mastermind 37710 points

    Elec,

    Elec Cheng said:

    1. Does TAS5720A-q1 have spread frequency function and slewrate setting?

    TAS5720 not support spread spectrum function.

    Elec Cheng said:

    2.As for DC filter, can adjusting register 0x02 lower internal energy and improve EMC performance?

    This filter is for DC blocking use, and cut off frequency is <20Hz, so is not useful for EMC improvement.

    For the EMC improvement at 97MHz, customer need to optimize from system level, including:

    1. minimize switching node area from layout.

    2. check if there is coupling path from switching node to output or cable

    Dylan

  • 0 in reply to Shadow He
    TI__Expert 7055 points

    Hi Dylan,

    How about the slew rate? Can we adjust?

    Thanks and Best Rearrds

    Elec Cheng