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TPA3110D2: DC Detect

Shu-Cheng LIN
Guru 11785 points
Part Number: TPA3110D2

Hi Sirs,

We would like to know, the condition of triggering DC Detect is when Vin voltage difference reaches 112 mV / AV (db) = 20.

It's mean LINP (Pin3) and RINP (Pin12) pressure drop to 112mV and more than 420ms will happen.

So if we try bypass C479, only reserve c456.

This conditions can be copied? if not, Is there any way to copy it?

  • 0
    TI__Mastermind 24835 points
    Hi Shu-Cheng,
    The data in the table is base on PVCC=10V. To trigger the DC Fault on the left channel, you could remove the two input capacitors(C477 and C476), then apply the input signal directly on the input pins(LINP and LINN). Enlarge the voltage different between LINN and LINP untill trigger the DC FAULT. The input DC detect threshold depends on PVCC and Gain setting. I believe you could get the about same result as the table shows.
    Best regards,
    Shawn Zheng