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LM49251 - Stereo Audio Subsystem

General Description

The LM49251 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones.

Part of TI’s PowerWise family of products, the LM49251 utilizes a high efficiency class G headphone amplifier topology as well as a high efficiency class D loudspeaker.

Key Features

  • 1.
  • 2 Class G Ground Referenced Headphone Outputs.
  • E2S Class D Amplifier.
  • No Clip Function.
  • Power Limiter Speaker Protection.
  • I2C Volume and Mode Control.
  • Advanced Click-and-Pop Suppression.
  • Micro-Power Shutdown.

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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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LM49251 www.ti.com SNAS498A – FEBRUARY 2011 – REVISED APRIL 2013 LM49251 Stereo Audio Subsystem with Class G Headphone Amplifier and Class D Speaker Amplifier with Speaker Protection Check for Samples: LM49251 FEATURES 1 •2 Class G Ground Referenced Headphone Outputs • E2S Class D Amplifier • No Clip Function • Power Limiter Speaker Protection • I2C Volume and Mode Control • Advanced Click-and-Pop Suppression • Micro-Power Shutdown APPLICATIONS • Feature Phones • Smart Phones KEY SPECIFICATIONS • Class G Headphone Amplifier, HPVDD = 1.8V, RL = 32Ω – IDDQHP: 1.15 mA (Typ) – Output Power, THD+N ≤ 1%: 20 mW (Typ) • Stereo Class D Speaker Amplifier RL = 8Ω – Output Power, THD+N ≤ 1%, LSVDD = 5.0V: 1.37 W (Typ) – Output Power, THD+N ≤ 1%, LSVDD = 3.