• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 541 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPA3110D2: POP noise when the PA power on

Teddy10086
Intellectual 275 points
Part Number: TPA3110D2

Hi,friends,

There is little pop noise  when power up.I have used a NMOS to pull down the /SD.But no use.

And I also pulled down the /SD before the PA power on.But no use.

There is a 18ms pulse in /SD when power on.

This is the waveform of  /SD when power on:

This is the schemic diagram:

What should I do to eliminate the pop noise?

  • 0
    TI__Mastermind 19030 points

    Hi Teddy,

    Do you use Tantalum capacitors on input pins?

    I suggest you use Tantalum capacitors. 

    You can also short the the input pins to ground through 1uF caps, and check if the pop noise gone or reduce. If so, there has noise from audio source.

    Regards,

    Derek