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TPA3112D1-Q1: Schematic review

Ivy Jin
Expert 3645 points
Part Number: TPA3112D1-Q1

Tool/software:

Hi team,

Could you please help review the schematic and give some comments? Thanks in advance!

Regards,

Ivy

  • +1
    TI__Genius 10190 points

    Ivy,

    Here is the feedback.

    1. the C35 GND connection position should be nearby DAC, and the trace should be matched with INP trace.

    2. take care of L1 and L2 inductor's saturation current.  it should be larger than 2A

    3. C29 and C34 should be larger, typically 1uF or 2.2uF should be used.  see datasheet section '8.2.2.5 When to Use an Output Filter for EMI Suppression'

    Dylan

  • 0 in reply to Dylan Yao
    TI__Expert 3645 points

    Hi Dylan,

    May I ask if the SD and fault can be pulled up to external 5V? or they must need to be pulled up by PVDD or ACDD.

    Regards,

    Ivy

  • +1 in reply to Ivy Jin
    TI__Mastermind 40690 points

    Hi Ivy

      SD pin internally is TTL structure powered by AVCC. If externally give a different power, will keep having leakage current, not recommend to do that.