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TAS2110: FAIL to get 6.1W output power

Victory Loh
Prodigy 60 points
Part Number: TAS2110

Hi TI experts,

I have came across a problem when using TAS2110 AMP IC for my design, which i am not able to obtain the output power (6.1W) as mentioned in the datasheet.

I only manage to get around 2.25W (3Vrms)

My measurement condition is as below:-

TAS2110 Input signal : -6dBFS (by APx525 machine)

Speaker impedance : 4Ohm

Internal booster : Yes

Boost mode : multilevel boost

Internal boosted voltage : 12V

Amplifier gain : 16dBV

Volume gain : 0dB

Please teach me how to get the output power (1%)  - 6.1W by using above setting.

Thank you.

  • 0
    TI__Genius 16850 points

    Hi,

    I think that the datasheet format in this case caused the confusion.

    the 6.1W value was not for a -6 dBFS input. based on my calculations you should achieve 6.1W with a ~-2.15 dBFS input

    -2.15dBFS + 16 dBV = 13.85 dBV = 4.92 Vrms -> 6.1 W into 4 ohm

    The specification "Output Voltage for Full-scale digital input" is measured at -6dBFS because of clipping and distortion that will occur at 0dBFS. The 6.32 Vrms figure is the theoretical undistorted amplitude for a 0dBFS input

    Regards,
    Arthur