The TFA9891 is a high efficiency class-D audio amplifier with a sophisticated speaker
boost and protection algorithm. It can deliver 7.2 W peak output power into an 8Ohm
speaker at a supply voltage of 3.6 V. The internal boost converter raises the supply
voltage to 9.5 V, providing ample headroom for major improvements in sound quality.
Unlike competing solutions, the adaptive sound maximizer algorithm uses feedback to
accurately calculate both the temperature and the excursion, allowing the TFA9891 to
adapt to changes in the acoustic environment.