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PCM2912A: Run a loud speaker through PCM2912A Codec

Subir Biswas
Prodigy 30 points
Part Number: PCM2912A

Hi Team,

I'm using PCM2912A in one of my design, where from AM335X usb port is only available for codec.

Need to run a 2watt/8ohm loud speaker with MIC support also.

Please check the codec and amplifier portion for any kind of modification.

Here the link of my schematic.

/cfs-file/__key/communityserver-discussions-components-files/6/3480.8168.USB_5F00_AUD_5F00_CODEC.pdf

Thanks..

  • 0
    TI__Guru 57800 points

    Hi, Subir,

    Welcome to E2E, Thanks for your interest in our products!.

    I have reviewed your schematic. please refer to the comments below:

    • The PCM2912A part of the schematic seems correct.  
    • The amplifier input is connected in pseudo-differential way, so it is required to connect the audio source for the amplifier to the positive input with a 1µF input capacitor, while the negative input should be connected to ground with a second 1µF capacitor only.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer

  • 0 in reply to Diego Melendez
    Prodigy 30 points

    Hi Diego,

    Thanks for guide.

    As you suggested changed the schematic. In schematic R17 / R18, given both the option. Finally we will use only one signal.

    0486.USB_AUD_CODEC.pdf

  • 0 in reply to Subir Biswas
    TI__Guru 57800 points

    Hi, Subir,

    Thanks for the feedback. The schematic of the amplifier looks good now.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer