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LM4804 - Low Voltage High Power Audio Power Amplifier

General Description

The LM4804 integrates a Boost Converter with an Audio Power Amplifier to drive voice coil speakers in portable applications.

When powered by a 3V supply, it is capable of creating 1.8W power dissipation in an 8Ω bridge-tied-load (BTL) with less than 1% THD+N.

Key Features

  • 1.
  • 23 Pop & Click Circuitry Eliminates Noise During Turn-On and Turn-Off Transitions.
  • Low, 2μA (Max) Shutdown Current.
  • Low, 11mA (Typ) Quiescent Current (VDD = 4.2V, RL = 8Ω).
  • 1.8W Mono BTL Output, RL = 8Ω, VDD = 3V.
  • Short Circuit Protection.
  • Unity-Gain Stable.
  • External Gain Configuration Capability.

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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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LM4804 www.ti.com SNAS268C – MARCH 2005 – REVISED APRIL 2013 LM4804 Boomer™ Audio Power Amplifier SerieLow Voltage High Power Audio Power Amplifier Check for Samples: LM4804 FEATURES 1 •23 Pop & Click Circuitry Eliminates Noise During Turn-On and Turn-Off Transitions • Low, 2μA (Max) Shutdown Current • Low, 11mA (Typ) Quiescent Current (VDD = 4.2V, RL = 8Ω) • 1.8W Mono BTL Output, RL = 8Ω, VDD = 3V • Short Circuit Protection • Unity-Gain Stable • External Gain Configuration Capability APPLICATIONS • Cellphone • PDA KEY SPECIFICATIONS • Quiescent Power Supply Current (VDD = 4.2V, RL = 8Ω), 11mA (Typ) • BTL Output Power (RL = 8Ω, 2% THD+N, VDD = 3V), 1.