Hi,
We are evaluating TPA6133A2 evm module. We are testing ( testing setup fig. 2) the output power of the TPA6133A2 using two different voltage levels (3.3V and 5V). We are unable to find any significant difference in the perceived audio level between the two voltage levels while listening through earphones. In the datasheet pg 5, appended fig.1 (it is mentioned that output power varies with different voltages).
Why there is no increase in loudness while giving 5 V to the TAP6133A2.
Voltages given to evm:
a) 5 V input
b) 3.3 V input
Fig. 1
Fig. 2
Regards,