LM4861

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SNAS095C – MAY 1997 – REVISED MAY 2013

LM4861

1.1W Audio Power Amplifier with Shutdown Mode

Check for Samples: LM4861

1

FEATURES

DESCRIPTION

The LM4861 is a bridge-connected audio power

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•

No output coupling capacitors, bootstrap

amplifier capable of delivering 1.1W of continuous

capacitors, or snubber circuits are necessary

average power to an 8

Ω load with 1% THD+N using

•

Small Outline (SOIC) packaging

a 5V power supply.

•

Compatible with PC power supplies

Boomer

audio

power

amplifiers

were

designed

•

Thermal shutdown protection circuitry

specifically to provide high quality output power with a

minimal

amount

of

external

components

using

•

Unity-gain stable

surface mount packaging. Since the LM4861 does

•

External gain configuration capability

not require output coupling capacitors, bootstrap

capacitors, or snubber networks, it is optimally suited

APPLICATIONS

for low-power portable systems.

•

Personal computers

The LM4861 features an externally controlled, low-

•

Portable consumer products

power consumption shutdown mode, as well as an

internal thermal shutdown protection mechanism.

•

Self-powered speakers

•

Toys and games

The unity-gain stable LM4861 can be configured by

external gain-setting resistors for differential gains of

up to 10 without the use of external compensation

KEY SPECIFICATIONS

components. Higher gains may be achieved with

•

THD+N for 1kHz at 1W continuous

average

suitable compensation.

output power into 8

Ω 1.0% (max)

•

Output power at 10% THD+N at 1kHz into 8

Ω

1.5 W (typ)

•

Shutdown Current 0.6µA (typ)

Connection Diagram

Figure 1. 8-Lead SOIC - Top View

See D Package

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PRODUCTION DATA information is current as of publication date.

Copyright © 1997–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.