Stock Code: 603160

Log In / Sign Up
Audio Amplifier

TFA9894: 10 V Highly Power-Efficient DSP Embedded Class-D Audio Amplifier


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


  • SPK Class-D

    1. 5.6 W into 8 Ω, 6.2 W into 4 Ω (THD<1%; VBAT= 4 V)
    2. Very low noise:<14 μV
  • 10 V 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 600 mW 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)
  • MCU platform digital IO support

    1. 3.3 V Digital IO support

System Block Diagram

Application Block Diagram






  • TFA9894_SDS_Rev.4.0 DS-VAA-00010-EN Rev.4.0 2020-01-21 PDF
  • TFA9894D_SDS_Rev.2.0 DS-VAA-00011-EN Rev.2.0 2020-01-21 PDF

Scan to follow

Open WeChat, click "Discover" at the bottom, and use "Scan" to follow.