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TPA3118D2: TPA3118: DC Voltage at output terminal

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Replies: 2

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Part Number: TPA3118D2

Dear Friends,


I have build an audio amplifier with the TPA3118 Class D amplifier. the issue is that  at the output i have a DC voltage, half of the power supply voltage. I added two 1000uf each in series with the positive and negative terminal of the speaker respectively for DC filter but the DC voltage is still there.

Any ideas?

I used the schematic in this pdf file www.ti.com/.../slou342a.pdf

Thank you,

Alexis.

  • Hi Alexis

    That is normal and correct phenomenon on OUT_P/N.

    OUT_P or N has DC offset(PVDD/2).

    Regards,

    Derek

  • In reply to Yanming Gong:

    Hi Derek,

    Thank you for your answer.

    That PVDD/2 voltage will not damage the speaker?

    Anyway, I will connect my loudspeakers to test it.

    Thanks again

    Alexis

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