NXP Semiconductors TFA9894 High-Efficiency Class-D Audio Amplifiers
NXP Semiconductors TFA9894 High-Efficiency Class-D Audio Amplifiers offer a sophisticated SpeakerBoost and Protection algorithm. The TFA9894 amplifiers feature up to 5.6W (AVG) output power into an 8Ω speaker and up to 6.2W (AVG) output power into a 4Ω speaker, at a battery supply voltage of 4.0V. The internal adaptive DC-to-DC converters provide ample headroom for major improvements in sound quality with a raised power supply voltage up to 10V.
Features
Sophisticated SpeakerBoost and Protection algorithm that maximizes speaker performance while protecting the speaker:Fully embedded software, no additional license fee or porting requiredFully integrated solution, including DSP, amplifier, DC-to-DC, and thermal sensingAdaptive excursion control - guarantees that the speaker membrane excursion never exceeds its rated limitReal-time temperature protection - direct measurement ensures that voice coil temperature never exceeds its rated limitEnvironmentally aware - automatically adapts speaker parameters to acoustic and thermal changes including compensation for speaker-box leakageClip avoidance - DSP algorithm prevents clipping even with sagging supply voltageAutomatic bandwidth extension to increase the low-frequency responseTFA9894 high output power: 5.6W (AVG) into 8Ω at 4.0V supply voltage (THD=1%, VBST=10V), 6.2W (AVG) into 4Ω at 4.0V supply voltage (THD=1%, VBST=9V)Supports handset and hands-free (4Ω to 32Ω) speaker configurations
Applications
Mobile phones & TabletsPortable Gaming Devices
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