TPA4411 Operation Principle that the Pop Noise Occurs

Sadanori Kato

Other Parts Discussed in Thread: TPA6132A2, TPA6130A2, TPA6133A2, TPA4411

Hi,

Could you please give me the operation principle that the pop noise occurs when I return to normal mode from shut-down mode using pins of SDR and SDL?

Best Regards,
Kato

over 11 years ago

0 Don Dapkus over 11 years ago

TI__Guru**** 189401 points

Hi, Kato-san,

Our newer parts like TPA6132A2, TPA6130A2, and TPA6133A2 don't have the pop.

The pop is due to offset errors which results in a transient being applied to the head phones when the part is powering up. The only way to fix it is to add an external circuit to the output which would control this transient. Unfortunately, we do not have a recommended circuit for this - instead, your customer should switch to one of the newer parts above.

-d2

0 Sadanori Kato over 11 years ago in reply to Don Dapkus

Guru 36540 points

Hi Don-san,

Thank you for your reply.
Could you please describe it using block diagram in detail?
I believe that the transition time of the charge pump is the cause.

Best Regards,
Kato

0 Don Dapkus over 11 years ago in reply to Sadanori Kato

TI__Guru**** 189401 points

Hi, Kato-san,

We have spent a lot of time trying to find a solution to the pop in the TPA4411, and we never found one. Please use one of our newer devices.

-d2

0 Sadanori Kato over 11 years ago in reply to Don Dapkus

Guru 36540 points

Hi Don-san,

Thank you for your information.
I will suggest new device like TPA6130A2, TPA6132A2 and TPA6133A2.

Best Regards,
Kato

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TPA4411 Operation Principle that the Pop Noise Occurs