TFA9896 Boosted audio system with adaptive sound maximizer and speaker protection Rev. 1 22 December 2016 Product short data sheet COMPANY PUBLIC 1 General description The TFA9896 is a high efficiency class-D audio amplifier with a sophisticated SpeakerBoost protection algorithm. It can deliver 2.1 W (RMS THD = 1 %) output power into an 8 speaker at a battery voltage of 3.6 V. Internal adaptive 6.1 V DC-to-DC conversion boosts the supply rail to provide additional headroom and power output. The supply voltage is only raised when necessary. This arrangement maximizes the output power and power efficiency during audio playback. A safe working environment is provided for the speaker under all operating conditions. The TFA9896 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. The adaptive sound maximizer algorithm uses feedback to accurately calculate both the temperature and the excursion, allowing the TFA9896 to adapt to changes in the acoustic environment. 2 The audio input interface is TDM and can be I S configured. Control settings are 2 communicated via an I C-bus interface. The TFA9896 is available in a 30-bump WLCSP (Wafer Level Chip-Size Package) with a 400 m pitch. 2 Features and benefits Sophisticated speaker-boost and protection algorithm that maximizes speaker performance while protecting the speaker: Fully embedded software, no additional license fee or porting required Total integrated solution that includes DSP, amplifier, DC-to-DC, sensing and more Adaptive excursion control guarantees that the speaker membrane excursion never exceeds its rated limit Real-time temperature protection - direct measurement ensures that voice coil temperature never exceeds its rated limit Environmentally aware - automatically adapts speaker parameters to acoustic and thermal changes including compensation for speaker-box leakage Output power: 2.1 W (RMS) into 8 at 3.6 V supply voltage (R = 8 , THD = 1 %) L Low noise (18 V, A-weighted) use case supported for handset call (Receiver mode) Attenuation setting: 0 dB to -15 dB in 1 dB steps Clip avoidance - DSP algorithm prevents clipping even with sagging supply voltage Bandwidth extension option to improve low frequency responseNXP Semiconductors TFA9896 Boosted audio system with adaptive sound maximizer and speaker protection Intelligent DC-to-DC converter maximizes audio headroom from any supply level and limits current consumption at low battery voltages Compatible with standard Acoustic Echo Cancellers (AECs) High efficiency and low power dissipation Wide supply voltage range (fully operational from 2.8 V to 5.5 V) 2 TDM audio interface configurable from 2 slots (I S) up to 16 slots 2 I C-bus control interface (400 kHz) Dedicated speech mode with speech activity detector Speaker current and voltage monitoring (via the TDM-bus) for Acoustic Echo Cancellation (AEC) at the host Fully short-circuit proof across the load and to the supply lines Sample frequencies from 8 kHz up to 48 kHz supported Option to route TDM input direct to TDM output to allow a second TDM input slave device to be used in combination with the TFA9896 Volume control Low RF susceptibility Input clock jitter insensitive interface Thermally protected Low pop noise at all mode transitions 3 Applications Mobile phones Tablets Portable gaming devices Portable Navigation Devices (PND) Notebooks/Netbooks MP3 players and portable media players TFA9896 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2016. All rights reserved. Product short data sheet Rev. 1 22 December 2016 COMPANY PUBLIC 2 / 22