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TPA3110D2: Problem with Tpa3110 Power Limit

Sreenath Chatterjee
Prodigy 120 points
Part Number: TPA3110D2

Hello
This is Sreenath, and I am currently facing a problem where I build my own amplifier based on Tpa3110 - Power Limiter, (as on Datasheet). But somehow after all soldering when I connect the amp to VCC -14V, there is no sound and the speakers does not provide any Output.

Please give me a solution what is wrong with it.

Thank You
Sreenath C.

**Schematic Diagram and Pcb Layout Attached.**

  • 0
    TI__Mastermind 19080 points

    Hi,

    Please check below points,

    • GVDD voltage,
    • Voltage on LINP pin,
    • Is there PWM waveform on OUTx pins?

    Thanks!

    Regards,

    Sam

  • 0 in reply to Sam(MPAA) Zhang
    Prodigy 120 points

    Hello

    Thanks for the reponse!

    I have checked the points as you mentioned, & the voltages I got were -

    GVDD - 5.8V

    LINP - 2.4V

    OUTx - I don't have a Oscilloscope, so couldn't measure the waveform, but I got the voltage rating of 5.4V at each Output pin (OUTPL, OUTNL, OUTPR, OUTNR).

    I have measured by placing one of my multimeter probe to GND & checking each Pin and Pad with the other Probe.

  • 0 in reply to Sam(MPAA) Zhang
    Prodigy 120 points

    Hello Sam,

    Thanks for the detailed suggestion.

    Actually it was my fault that the input pins were not soldered properly, maybe that was the problem.
    But now after soldering, everything is back to normal and can play sound.

    So the new problem that I am facing, is that while its playing music the chips gets very hot maybe around 60~80°C, Can you tell me why is that so? And the other problem is that the music is very damped and distorted, doesn't sound like 15w, but like 5W. I think that might be due to the 100uH Inductor.

    Thank You
    Sreenath C.

  • 0 in reply to Sreenath Chatterjee
    TI__Mastermind 19080 points

    Hi,

    For the output filter, please use the typical combination like 10uH+1uF. I'm suspecting the 100uH you are using has limited saturation current spec to support the 15W output.

    Please change the output filter and try again. Thanks!

    Regards,

    Sam