Stock Code: 603160

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Audio Amplifier

TFA9874: 10 V Highly Power-Efficient Class-D Audio Amplifier


The TFA9874 DSP embedded is a highly power-efficient class-D audio amplifier solution associated with speaker protection and boost algorithm.


  • SPK Class-D

    1. 5.6W into 8 Ω, 6.2W into 4 Ω (THD<1%; VBAT= 4V)
    2. Very low noise:<14μV
  • 10V Adaptive DC-DC Boost

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

    1. High system efficiency: 91% peak efficiency for 600mW sine wave
    2. Low battery consumption:<125 mA (Po = 380 mW, average music power)
  • Embedded SpeakerBoost Algorithm

    1. Speaker damage protection for thermal mechanical damage overload and enhanced loudness on speaker
    2. On host or DSP integrated only on TFA9894 (V2.0)

System Block Diagram

Application Block Diagram






  • TFA9874B_SDS_Rev.2.0 DS-VAA-00003-EN Rev.2.0 2020-01-21 PDF
  • TFA9874D_E_SDS_Rev.2.0 DS-VAA-00004-EN Rev.2.0 2020-01-21 PDF

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