Datasheet

Power:
The amplifier can be powered by
2.7 to 5.5v DC. Good power
sources are:
5v 2A power
supply (http://adafru.it/276)
3xAA (4.5v) battery
holder (http://adafru.it/771)
Connect the negative wire to
GND and the positive wire to
VDD.
© Adafruit Industries https://learn.adafruit.com/stereo-3-7w-class-d-audio-amplifier Page 11 of 18