AN12974A

Delivers spacious 3D sound for a stereo system with
   such as cellular phones' speakers in close proximity.
The AGC circuitry can activate to minimize distortion,
   raising the average volume level and it can prevent
   speaker from breaking when an input level is too high.
High output BTL poweramplifier, whenAGC is on, speaker output: 
   700mW (V = 4.2 V, RL = 8 , when AGC is on, the rate of the 
   output wave pattern's distortion would be approximately 1%) CC-SP ?

Operating supply voltage: V = 2.55 V to 3.5 V, V = 2.55 V to 4.5 V CC CC-SP