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LM4946 - Output Capacitor-Less Audio Subsystem

Description

The LM4946 is an audio power amplifier capable of delivering 540mW of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N, 35mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration wit

Features

  • 1.
  • 2 I2C/SPI Control Interface.
  • I2C/SPI Programmable TI 3D Audio.
  • I2C/SPI Controlled 32 Step Digital Volume Control (-54dB to +18dB).
  • Three Independent Volume Channels (Left, Right, Mono).
  • Eight Distinct Output Modes.
  • WQFN and DSBGA Surface Mount Packaging.
  • “Click and Pop” Suppression Circuitry.
  • Thermal Shutdown Protection.
  • Low Shutdown Current (0.02uA, typ).
  • RF Immunity Topology.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM4946 www.ti.com SNAS335E – JANUARY 2006 – REVISED AUGUST 2007 LM4946 Output Capacitor-Less Audio Subsystem with Programmable TI 3D Check for Samples: LM4946 FEATURES 1 •2 I2C/SPI Control Interface • I2C/SPI Programmable TI 3D Audio • I2C/SPI Controlled 32 Step Digital Volume Control (-54dB to +18dB) • Three Independent Volume Channels (Left, Right, Mono) • Eight Distinct Output Modes • WQFN and DSBGA Surface Mount Packaging • “Click and Pop” Suppression Circuitry • Thermal Shutdown Protection • Low Shutdown Current (0.02uA, typ) • RF Immunity Topology APPLICATIONS • Mobile Phones • PDAs KEY SPECIFICATIONS • THD+N at 1kHz, 540mW into 8Ω BTL (3.3V) 1.0% (typ) • THD+N at 1kHz, 35mW into 32Ω SE (3.3V) 1.0% (typ) • Single Supply Operation (VDD) 2.7 to 5.
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