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tpa3125d2 max input signal

Prodigy 70 points

Replies: 4

Views: 439

Hi.

I can't find the max input signal of TPA3125d2. My problem is that with ho input signals the amplifier switch off for a moment and then restart.

4 Replies

  • Hi, Michele

               I am sorry I am not sure what is your problem? Could provide more details?

  • In reply to Peter Cao:

    Hi, Michele
    Common mode voltage of TPA3125D2's LIN and RIN is 1.6V, so the max input signal is 3.2Vpp.
    It seems the device on your board has some fault (Over temperature shutdown or Over current protection shutdown), could you send your schematic to me?

  • In reply to Peter Cao:

    Hi.
    You can find the preamp schematic here : www.jovesdies.it/tpa preamp.pdf
    As you can see it's a simple 2 stage fet preamp with a simple RED LED limiter. At the end of the preamp there are 2 op amps for invert the signal and enter in Left and Right input of TPA3125D2. The amp is configured as BTL for use with a Guitar. My problem is that with high level signal coming from the preamp, the AMP shutoff for a moment (the Peak signal I suppose).
  • In reply to michele fregoni:

    Hi, Michele

             Maybe the input signal has a spike at the start stage, this will cause a high output voltage spike (with small load) of TPA3125D2. However, for TPA3125D2, the Over current protection will  Auto Recovery, so the AMP shutoff only for a moment.

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