TPA6211A1: No audio playing but Speaker sound pressure is over during the EMC Conducted Disturbances Immunity Test

Hi, Eric,

Could you attach the pictures again, please? Unfortunately, I am not able to see the pictures you mentioned.

Could you provide the TPA6211A1 schematic portion in order to have a better approach to this case?

Thank you.

Best regards,
Luis Fernando Rodríguez S.

Hi, Eric,

I just saw you post the pictures. I will take a look at them and provide my feedback as soon as possible.

Best regards,
Luis Fernando Rodríguez S.

Hi, Eric,

I would suggest to try using an LC filter in order to filter the high-frequency noise. I recommend to take a look at the document and tool below for a proper filter configuration based on what you require.

https://www.ti.com/lit/an/slaa701a/slaa701a.pdf

https://www.ti.com/tool/LCFILTER-CALC-TOOL

Please let me know if you have additional questions or comments.

Best regards,
Luis Fernando Rodríguez S.

Hi Sir,

Thank you very much for the information.

We will modify the circuit and test again.

We will also reduce the Amp gain and check if the speaker quality(it may be damaged by over rating operating).

Thanks,

Eric Fu