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LM4810: LM4810_ pop noise

user4719845
Intellectual 315 points
Part Number: LM4810

Hi

I has a application use LM4810 but I control PIN5 (shutdown) hi to lo will has  pop noise, how to I design can inhibition issue.

  • 0
    TI__Guru** 100555 points
    Hi,

    This is a single-ended output device, so the outputs are centered at mid-supply voltage; pop is expected on this kind of drivers. You could increase bypass capacitor to make a longer charge/discharge ramp to reduce pop, or you can also try to place additional high value resistors along the signal path to provide a better discharge path for output coupling capacitors.

    What are your system requirements? You could take a look at our TPA613x family of headphone amplifiers that have internal charge-pump so that outputs are GND-centered, reducing/eliminating pop during power cycle.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    Intellectual 315 points

    Cb I put 10uF, but after I turn off the mute, there will still be pop, put 10K in Vout, still not improved.