TFA9895

TFA9895 Boosted class-D audio amplifier with speaker boost protection and multiband dynamic range compressor Rev. 1 — 23 October 2013 Product short data sheet 1. General description The TFA9895 is a high efficiency class-D audio amplifier with a sophisticated speaker boost protection algorithm that features multi-band compression. It can deliver 2.65 W (RMS; THD = 1 %) output power into a 4  speaker at a battery voltage of 3.6 V. The internal boost converter raises the supply voltage to 5.3 V, providing ample headroom for major improvements in sound quality. A safe working environment is provided for the speaker under all operating conditions. The TFA9895 maximizes acoustic output while ensuring diaphragm displacement and voice coil temperature do not exceed their rated limits. This function is based on a speaker box model that operates in all loudspeaker environments (e.g. free air, closed box or vented box). Furthermore, advanced signal processing ensures that the quality of the audio signal is never degraded by unwanted clipping or distortion in the amplifier or speaker. Unlike competing solutions, the adaptive sound maximizer algorithm uses feedback to accurately calculate both the temperature and the excursion, allowing the TFA9895 to adapt to changes in the acoustic environment. Internal intelligent DC-to-DC conversion boosts the supply rail to provide additional headroom and power output. The supply voltage is only raised when necessary. This precaution maximizes ...