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TPA3136D2: TPA3136 pop noise

Frank Peng
Intellectual 440 points
Part Number: TPA3136D2

Hi  ！

     

 TPA3136D have POP noise when  power up and power down ，Pull up and  pull down  the SD pin  have POP noise  too. the SCH is  the same as TPA3136D2EVM,  How can reduce it ？   Many  thanks ！

  • 0
    TI__Mastermind 24835 points
    Hi Frank,
    It's really hard to distinguish the values in the picture, could you please help to post a higher resolution one.
    Is it possible to use differential input instead of single-ended? Please make sure the matching between differential input(INN/INP) is good to avoid the pop noise. One experiment that you could try to do is that, disconnect the input circuit from the front-end and connect pin input pins to GND by 0.22uF caps. See if the issue is still there. If no pop noise any more, we need to improve the matching between differential input.
    Best regards,
    Shawn Zheng