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LM4674A - Filterless 2.5W Stereo Class D Audio Power Amplifier

General Description

The LM4674A is a single supply, high efficiency, 2.5W/channel, filterless switching audio amplifier.

A low noise PWM architecture eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design.

Key Features

  • 1.
  • 2 Output Short Circuit Protection.
  • Stereo Class D Operation.
  • No Output Filter Required.
  • Logic Selectable Gain.
  • Independent Shutdown Control.
  • Minimum External Components.
  • Click and Pop Suppression.
  • Micro-Power Shutdown.
  • Available in Space-Saving 2mm x 2mm x 0.6mm DSBGA Package.

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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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LM4674A www.ti.com SNAS366A – SEPTEMBER 2006 – REVISED MAY 2013 LM4674A Filterless 2.5W Stereo Class D Audio Power Amplifier Check for Samples: LM4674A FEATURES 1 •2 Output Short Circuit Protection • Stereo Class D Operation • No Output Filter Required • Logic Selectable Gain • Independent Shutdown Control • Minimum External Components • Click and Pop Suppression • Micro-Power Shutdown • Available in Space-Saving 2mm x 2mm x 0.6mm DSBGA Package APPLICATIONS • Mobile Phones • PDAs • Laptops KEY SPECIFICATIONS • Efficiency at 3.6V, 100mW into 8Ω 80% (typ) • Efficiency at 3.6V, 500mW into 8Ω 85% (typ) • Efficiency at 5V, 1W into 8Ω 85% (typ) • Quiescent Power Supply Current at 3.6V Supply 4mA • Power Output at VDD = 5V, RL = 4Ω, THD ≤ 10% 2.