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TPA3116/TPA3118/TPA3130 Gain Setting in Master and Slave

John Guy1
Prodigy 100 points

Hi

Attempting to set 20dB gain on a TPA3118, and I believe there is an inconsistency in the datasheet.

  • In the EC table, it says for GAIN(BTL) mode, for 20dB, connect R2 of 20k to ground, R1 open.
  • In table 1, it says for GAIN(MSTR) mode for 20dB, connect R2 of 5.6k to grounb, R1 open.

I believe there is a typo in EC table, it is master, not BTL mode (always BTL mode, that is)

For a gain of 20dB, what is the correct value for R2?

Thanks

John

  • 0
    TI__Guru**** 189401 points

    Hi, John,

    Nice catch, I thought we fixed that... It doesn't really matter the value of R2 in this case. The most important thing is if you use a divider, you don't draw too much current out of GVDD...  Since in this case, no current is drawn from GVDD, you just want something to pull the pin to ground.

    And, yes, it should be MSTR, not BTL...

    I will get the d/s updated the next go-around.

    -d2