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TAS2770EVM: Not able to drive a speaker to its rated power (3W)

Part Number: TAS2770EVM
Other Parts Discussed in Thread: TAS2770

I have question related to an issue I am facing while driving a speaker rated 3W from the EVM TAS2770.  The speaker is rated for 3W and its impedance is 8ohm. I am powering the EVM with  a 10V supply.  The The volume control on the PPC3 console was set to 0 dB and the amplifier level to 21dBV. The actual issue is when I monitor the speaker current, I can tell the speaker power is only about 1.5W instead of 3W. I am wondering it there is some setting in the PPC 3 or the EVM which is limiting the speaker output to drive at its rated power.  Can you provide support on this?

  • Hi, Anuradha,

    Our team will take a look at this and will answer as soon as possible.

    Best regards,
    Luis Fernando Rodríguez S.

  • Hi Anuradha,

    Can you share your device configuration? Either PPC3 or cfg should be fine.

    If you can also share captures of your measurements and hardware setup it would be helpful.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators

  • I have tried to attach the PPC 3 file. But not sure if it getting inserted correctly. 

    STIPA testing.ppc3.txt
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  • Anuradha,

    I'm not able to open the file.

    You can send ppc3 and captures of your setup if possible directly to my email: ivan.salazar@ti.com

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators

  • I have just emailed you the file and the setup. 

  • Anuradha,

    I'm following up on your email thread.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators