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TPA3220: Pls help review our SCH design.

Part Number: TPA3220
Other Parts Discussed in Thread: LM5121

Dear Sir/Madam,

We have designed the TPA3220 sch according to its datasheet.

The background is as below:

LM5121 provides 26V to them;

1pcs for tweeter, 2x10Wrms, 17.5Wpeak 1% THD @ 16ohm;

1pcs for mid-range speaker, 2x15Wrms, 35Wpeak 1% THD @ 8ohm; 

1pcs for subwoofer, 80Wrms, 120Wpeak 1% THD, 160Wpeak 10% THD @ 2 ohm;

Pls help review our SCH design, thank you!TPA3220.pdf

  • Hi,

    Please see my comments.

    1) suggest use inductor on PVDD power instead of beads.

    2) add 0.1uF caps on PVDD power pins.

    3) The caps of LC filter, C187, C188, C191 and C192 should be 1uF or 1.5uF.

    4) Add zobel(4.7ohm+330nF) on output close to connector for 16ohm speaker.