TFA9887

TFA9887 Audio system with adaptive sound maximizer and speaker protection Rev. 1 — 11 July 2012 Product short data sheet 1. General description The TFA9887 is an audio system consisting of a high efficiency class-D audio amplifier, and embedded DSP with a sophisticated speaker-boost and protection algorithm and an intelligent DC-to-DC converter. It can safely deliver 2.65 W (RMS; THD = 1 %) output power into a 4  speaker that is nominally only rated for 0.5 W. The integrated intelligent DC-to-DC converter allows the system to deliver this power from a battery voltage of 3.6 V. The audio input interface is I2S and the control settings are communicated via an I2C-bus interface. The TFA9887 guarantees safe speaker operation under all operating conditions. It maximizes acoustic output while ensuring diaphragm displacement and voice coil temperature do not exceed rated limits. The processing is capable of providing a significant improvement in sound volume and quality, while also ensuring reliable operation. This function is based on and adaptive model that operates in all loudspeaker environments (e.g. free air, closed box or vented box). Furthermore, advanced signal processing ensures the quality of the audio signal is always optimized. Adaptive DC-to-DC conversion boosts the supply voltage only when necessary (when the output signal level is high). This maximizes the output power of the class-D audio amplifier while limiting quiescent power consumption. The TFA9887 also adapt...