TFA9874 Block Diagram
TFA9874 Application Diagram

The TFA9874, embedded with DSP is a highly power-efficient class-D audio amplifier solution associated with speaker protection and boost algorithm. It can deliver up to 10.0 W peak output power into an 8 Ω speaker and up to 11.8 W peak output power into a 6 Ω speaker, at a supply voltage of 4.0 V. The internal adaptive DC-to-DC converter raises the supply voltage up to 10.0 V, providing ample headroom for major improvements in sound quality.

TFA9874 Block Diagram
TFA9874 Application Diagram

Key Features

  • SPK Class-D

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

    • 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)

Read More


Document Type

Name Rights Description Version Date
TFA9874D E SDS Public Rev.2.1 2020-12-10
TFA9874B SDS Public Rev.2.1 2020-12-10
Your Voice Matters
Contact Sales

Scan to follow

Open WeChat, use "Scan" to follow.