TFA9894 Block Diagram
TFA9894 Application Diagram

The TFA9894 is a highly power-efficient DSP embedded Class-D audio amplifier solution associated with speaker protection and boost algorithm which features audio enhancement and speaker protection algorithm embedded on DSP on chip.

TFA9894 Block Diagram
TFA9894 Application Diagram

Key Features

  • SPK Class-D

    • 5.6 W into 8 Ω, 6.2 W into 4 Ω (THD < 1%; Vbat = 4 V)

    • Very low noise: < 14 μV

  • 10 V Adaptive DC-DC Boost

    • Maximizes the output power of the Class-D audio amplifier while preventing large battery supply spikes and limiting quiescent power consumption

  • Power consumption

    • High system efficiency: 91% peak efficiency for 600 mW sine wave

    • Low battery consumption: < 125 mA (Po = 380 mW, average music power)

  • Embedded SpeakerBoost algorithm

    • Speaker damage protection for thermal mechanical damage overload and enhanced loudness on speaker

    • On host or DSP integrated only on TFA9894 (V2.0)

  • MCU platform digital IO support

    • 3.3 V digital IO support

Read More


Document Type

Name Rights Description Version Date
TFA9894D SDS For Public Rev.2.2 2020-12-10
TFA9894 SDS For Public Rev.4.1 2020-12-10
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