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Audio - Speaker Drive Power for +3.3 V bat

SelvaKumaran R
Expert 3025 points
Other Parts Discussed in Thread: TPS65950

Champs,

In TPS65950 datasheet the Audio output power has been specified as 0.4W when the supply Vbat is greater than 3.6V.

Please let me know the audio output power of TPS65950 when the supply is 3.3V for the load impedance of 8 ohm. How much it will be less than 0.4W? If we have characteristic curve for various Vbat, it would be helpful.

  • 0
    TI__Prodigy 80 points

    The maximum output power depends on the gain setting of the full downlink path. Below is the relation between VBAT level and max output power @ 1% distortion, with a load resistance = 8 ohm.

                 3.3V   è         390mW (0dB gain setting 0dBFs à 1.76Vrms)

                 3.6V   è         490mW (+1dB gain setting)

                 4.0V   è         620mW (+2dB gain setting)

                 4.6V   è         772mW (+3dB gain setting)