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TLV320AIC3204: Headphone Pop sound issue when power apply

Jimmy Chen61
Intellectual 420 points
Part Number: TLV320AIC3204

Hi

The pop sound issue can reproduce on CC85XX Headset EVK when we apply input voltage to LDOIN(LDO_SEL connect with VDD) and VDD at same time.

Does there have any notice with power on/off sequece for AIC3204?

Regards

  • 0
    TI__Guru 57800 points

    Hi, Jimmy,

    LDOIN and VDD are tied, so I would expect them to be powered together , it is actually strange that you can hear the pop noise during power-up as the headphone outputs should be off by default. In general, it is recommended to keep the device in Reset state until all the power supplies are stable to make sure al the blocks of the device return to the default state.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer

  • 0 in reply to Diego Melendez
    Intellectual 420 points
    Hi,
    Thanks for your command. We try to keep reset state until all power stable but still with pop sound.
    The pop sound seems caused by AVDD apply even keep 3204 in default state.
  • 0 in reply to Jimmy Chen61
    TI__Guru 57800 points

    Hi, Jimmy,

    This is unexpected as the headphone drivers are turned Off by default. Are you applying an external voltage to AVDD pin?, the CC85XX Headset EVK provides a connection to LDOIN, which actually is set to enable the internal LDO of the part when LDO_SEL is connected to VDD.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer