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LM4991 - 3W Audio Power Amplifier

Datasheet Summary

Description

The LM4991 is a mono bridged audio power amplifier capable of delivering 3W of continuous average power into a 3Ω load with less than 10% THD when powered by a 5V power supply (Note 1).

Features

  • include thermal shutdown protection, unity-gain stability, and external gain set. Note 1: An LM4991LD that has been properly mounted to a circuit board will deliver 3W into 3Ω (at 10% THD). The other package options for the LM4991 will deliver 1.5W into 8Ω (at 10% THD). See the.

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Datasheet Details

Part number LM4991
Manufacturer National Semiconductor
File Size 543.20 KB
Description 3W Audio Power Amplifier
Datasheet download datasheet LM4991 Datasheet
Additional preview pages of the LM4991 datasheet.

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Full PDF Text Transcription

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LM4991 3W Audio Power Amplifier with Shutdown Mode May 2003 LM4991 3W Audio Power Amplifier with Shutdown Mode General Description The LM4991 is a mono bridged audio power amplifier capable of delivering 3W of continuous average power into a 3Ω load with less than 10% THD when powered by a 5V power supply (Note 1). To conserve power in portable applications, the LM4991’s micropower shutdown mode (ISD = 0.1µA, typ) is activated when VDD is applied to the SHUTDOWN pin. Boomer audio power amplifiers are designed specifically to provide high power, high fidelity audio output. They require few external components and operate on low supply voltages from 2.2V to 5.5V.
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