TPA3112D1-Q1: Abnormal sound occurs when the product is powered on

ian wu

Part Number: TPA3112D1-Q1

Tool/software:

hi expert，

we use the TPA3112D-Q1，but Abnormal sound occurs when the product is powered on,Attached is the schematic diagram, please help to see where there is a problem, and please give some suggestions

8 months ago

0 Gregg Scott 8 months ago

TI__Mastermind 45085 points

I see that there is an unusual circuit on the SD and Fault pins. Does this allow for the SD pin to fully come out of Standby? Remove R26 and see if it improves the abnormal sound. What debugging have you tried?

Regards,
Gregg Scott

0 ian wu 8 months ago in reply to Gregg Scott

Intellectual 825 points

R26 is not attached in the actual circuit, do you have any other suggestions

0 Gregg Scott 8 months ago in reply to ian wu

TI__Mastermind 45085 points

Ian,

You can remove R37. This will remove the source to see if the noise is coming from the source. If the noise is still present, then the amp is producing it. If the source is producing it, the DAC or the digital audio is the source of the noise.

Regards,
Gregg Scott

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TPA3112D1-Q1: Abnormal sound occurs when the product is powered on