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LM4946 Datasheet Output Capacitor-Less Audio Subsystem

Manufacturer: Texas Instruments

Overview: LM4946 www.ti.com SNAS335E – JANUARY 2006 – REVISED AUGUST 2007 LM4946 Output Capacitor-Less Audio Subsystem with Programmable TI 3D Check for Samples:.

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General 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 with identical specifications as the SE configuration, from a 3.3V power supply.

The LM4946 has three input channels: one pair for a two-channel stereo signal and the third for a differential single-channel mono input.

The LM4946

Key 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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