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LM4890 - 1 Watt Audio Power Amplifier

General Description

The LM4890 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications.

It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

Key Features

  • 1.
  • 2 Available in Space-Saving Packages: DSBGA, VSSOP, SOIC, and WSON.
  • Ultra Low Current Shutdown Mode.
  • BTL Output Can Drive Capacitive Loads.
  • Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions.
  • 2.2 - 5.5V Operation.
  • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required.
  • Thermal Shutdown Protection.
  • Unity-Gain Stable.
  • External Gain Configuration Capabil.

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Full PDF Text Transcription for LM4890 (Reference)

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LM4890 www.ti.com SNAS138L – SEPTEMBER 2001 – REVISED MAY 2013 LM4890 1 Watt Audio Power Amplifier Check for Samples: LM4890 FEATURES 1 •2 Available in Space-Saving Packa...

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heck for Samples: LM4890 FEATURES 1 •2 Available in Space-Saving Packages: DSBGA, VSSOP, SOIC, and WSON • Ultra Low Current Shutdown Mode • BTL Output Can Drive Capacitive Loads • Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions • 2.2 - 5.5V Operation • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required • Thermal Shutdown Protection • Unity-Gain Stable • External Gain Configuration Capability APPLICATIONS • Mobile Phones • PDAs • Portable Electronic Devices KEY SPECIFICATIONS • PSRR at 217Hz, VDD = 5V (Fig. 1): 62dB(typ.) • Power Output at 5.0V & 1% THD: