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Original question:

TPA3110D2: TPA3110D2PWPR

TPA3110D2: TPA3110D2PWPR

Sai Ravali
Prodigy 70 points
Part Number: TPA3110D2
Other Parts Discussed in Thread: TPA3156D2

Tool/software:

we have used the TPA3110D2PWPR amplifier along with PoE from TI in our IP Speaker project. Got reviewed both the schematics and layout.

I am attaching the schematics of the project again for your reference. Our issue is that the on-board TI amplifier (TPA3110D2PWPR) is not producing any sound from the speaker.

We have also provided a provision to connect an external amplifier on the same board.  When we connect the external amplifier, the audio output from the speaker works fine. This confirms that communication among CODEC, MPU, and external amplifier is proper. (Refer to the image below showing the external amplifier connection. Case2) 

However, with the on-board TI amplifier, there is no audio output from the speaker. We have also implemented a gain control mechanism in the circuit. Please review the on-board amplifier circuit (shown below) and help us identify the issue. (case1) 

Please check the complete schematics and support us in resolving this amplifier issue soon. 
If you have any questions or need clarifications, please let us know.
Thanks & Regards,
Sai Ravali
IP_SPEAKER_Schematic_2024-09-25.PDF 

  • 0
    TI__Mastermind 18240 points

    Hello,

    Is the fault pin triggering? When you use an external amp, are you using the TPA3110D2 EVM?

    Regards,
    Sydney Northcutt

  • 0 in reply to Sydney Northcutt
    Prodigy 70 points

    Hi Sydney Northcutt

    We are currently using the TPA3110D2PWPR amplifier on our board, driving a 30 W speaker. The amplifier works, but when the volume is increased, the audio quality degrades significantly. I understand that the TPA3110D2 is specified for 30 W output power at 10% THD+N.

    Can you please suggest an alternative amplifier IC, preferably with the same footprint, that can deliver around 60 W output (or at least 30 W in mono BTL mode) with <1% THD+N?

  • 0 in reply to Sai Ravali
    TI__Mastermind 18240 points

    Hello,

    For a test please increase your PVDD to the max recommended spec of 26 V. I think the issue is that your PVDD is too low to drive at the higher output powers. 

    For another device rec I would look into TPA3156D2.

    Regards,
    Sydney Northcutt