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LM4890 - 1 Watt Audio Power Amplifier

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.

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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Datasheet preview – LM4890

Datasheet Details

Part number LM4890
Manufacturer Texas Instruments
File Size 2.12 MB
Description 1 Watt Audio Power Amplifier
Datasheet download datasheet LM4890 Datasheet
Additional preview pages of the LM4890 datasheet.

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Full PDF Text Transcription

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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 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: 1W(typ.) • Power Output at 3.3V & 1% THD: 400mW(typ.
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