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TPA3128D2: Tpa3128d2 releases a "poof" sound when it is muted, resulting in a "poof" sound when the power amplifier is powered on, And it lasts a little longer, a little like the echo of karaoke, Although mute is added in advance to blo

2018
Expert 2630 points
Part Number: TPA3128D2

TPA3128d2 releases a "poof" sound when it is muted, resulting in a "poof" sound when the power amplifier is powered on,           

And it lasts a little longer, a little like the echo of karaoke,           

Although mute is added in advance to block the "poof" sound when the power amplifier is turned on, as soon as mute is released to make the power amplifier work normally, the "poof" sound will appear immediately.

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    TI__Mastermind 19650 points

    Hi,

    The power on sequence is : Mute Amplifier first, Then SDZ High, Delay >40ms then Unmute Amplifier

    If the pop noise still can not match your requirement, you can try to connect input to GND through 1uF caps.  And check if the pop noise is lower or not.

    Regards,

    Derek