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TAS3251: TAS3251 Questions.

Ian Wang
Mastermind 29940 points
Part Number: TAS3251


Hi Sir,

My customer using TAS3251 for 100W, (VDD=26V @ RL=2ohms),  here are 2 questions need your help, thanks.

1. What is min. o/p inductor? 4.7uH or 2.2uH or...

2. TAS3251 will default active w/o initial setting?

Thanks, Ian.

  • 0
    TI__Genius 9995 points

    Hi Ian,

    Usually, the smaller inductor is, the larger ripple current is. Can you share the background of customer's requirement for the minimum inductor?

    As tot the initial settings for TAS3251, it is suggested to grant you and customer the access to TAS3251 in PPC3 GUI and then customer can generate the settings from PPC3 software.

    Please let me know your thinking, thanks！

    BR

    Alix Wan.

  • 0 in reply to Alix Wan
    TI__Mastermind 29940 points

    Hi Wan,

    1. can it using 4.7uH or 2.2uH? (small inductor reduce space)

    2. Can it active w/o setting? (default active)

    Thanks, Ian.

  • 0 in reply to Ian Wang
    TI__Mastermind 19080 points

    Hi Ian,

    1. As you know, the LC filter in a class-d circuit is used to filter out the switching frequency components. 4.7uH can be used, but that may lead to insufficient attenuation on the switching frequency components and degrading the audio performance.

    2. Yes, by default it should be active.

    Thanks!

    Regards,

    Sam

  • 0 in reply to Ian Wang
    TI__Mastermind 19080 points

    Hi Ian,

    Furthermore, small inductance may lead to high inductor current ripple, degrading the audio performance and also easier to trigger the OC fault when outputting high power.

    Thanks!

    Regards,

    Sam