So for this amplifier IC - PAM8403 - which is a 3W + 3W class d, what is the current requirement or in other terms, what will be the load current. I know since this is an audio amplifier, load current is not always fixed. But as a generalization, what will be the value.
I was planning to use a 3.7V 2600mAh cell to power it, through a 5V regulator. I doubt that it is 0.6A per channel. For other ratio of voltage and power, the result is not the same.
- Just want to know how long that cell can power this amp.
In datasheets, different values for power based on different values of voltages are listed. That is understandable but for the same voltage and load, they also put forth that if THD + N is 1%, power will be different and if THD + N is 10%, power output is little more than the former, even though the voltage supplied and the connected load is same.
- Is there a particular way to select/switch an appropriate Total harmonic Distortion + Noise figure, while designing?
EDIT - The speaker driver is rated at 4 ohm.