TFA9876 Block Diagram
TFA9876 Application Diagram

The TFA9876 is a high efficiency 10.0 V boosted class-D audio amplifier. It can deliver up to 10.0 W peak output power to an 8 Ω speaker and up to 11.8 W peak output power in 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.

TFA9876 Block Diagram
TFA9876 Application Diagram

Key Features

  • High output power: 5.6 W (average) into 8 Ω at 4.0 V supply voltage (THD = 1 %)

  • Supports handset and hands-free speaker configurations

  • Ultra-low noise 7 μV mode in handset call with moderate output power

  • High efficiency, low power dissipation speaker driver

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

  • Adaptive DC-to-DC converter increases the supply voltage smoothly while switching between fixed boost and adaptive boost modes. It thus, prevents the large battery supply spikes and limits quiescent power consumption

  • Wide supply voltage range (fully operational from 2.7 V to 5.5 V)

  • SoundWire v 1.1 MIPI-compliant interface for audio and control

  • Legacy I2C-bus control interface (400 kHz)

  • Legacy TDM audio interface

  • Low latency 64 fs, 128 fs PDM through SoundWire

  • Speaker current and voltage monitoring for acoustic echo cancellation (AEC) at the host

  • 16 kHz / 32 kHz / 44.1 kHz / 48 kHz sample frequencies supported

  • Ultrasonic support with sample frequency of 96 kHz

  • Programmable interrupt control through a dedicated interrupt pin

  • Low RF susceptibility

  • Excess temperature protection

  • 15 kV system-level ESD protection without external components on amplifier output

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Document Type

Name Rights Description Version Date
TFA9876 SDS For Public Rev.1.0 2023-04-20
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