LM4861MX Datasheet, PDF (1/20 Pages) Texas Instruments – LM4861 1.1W Audio Power Amplifier with Shutdown Mode

LM4861
www.ti.com
SNAS095C – MAY 1997 – REVISED MAY 2013
LM4861
1.1W Audio Power Amplifier with Shutdown Mode
Check for Samples: LM4861
FEATURES
1
•2 No output coupling capacitors, bootstrap
capacitors, or snubber circuits are necessary
• Small Outline (SOIC) packaging
• Compatible with PC power supplies
• Thermal shutdown protection circuitry
• Unity-gain stable
• External gain configuration capability
APPLICATIONS
• Personal computers
• Portable consumer products
• Self-powered speakers
• Toys and games
KEY SPECIFICATIONS
• THD+N for 1kHz at 1W continuous average
output power into 8Ω 1.0% (max)
• Output power at 10% THD+N at 1kHz into 8Ω
1.5 W (typ)
• Shutdown Current 0.6µA (typ)
DESCRIPTION
The LM4861 is a bridge-connected audio power
amplifier capable of delivering 1.1W of continuous
average power to an 8Ω load with 1% THD+N using
a 5V power supply.
Boomer audio power amplifiers were designed
specifically to provide high quality output power with a
minimal amount of external components using
surface mount packaging. Since the LM4861 does
not require output coupling capacitors, bootstrap
capacitors, or snubber networks, it is optimally suited
for low-power portable systems.
The LM4861 features an externally controlled, low-
power consumption shutdown mode, as well as an
internal thermal shutdown protection mechanism.
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
components. Higher gains may be achieved with
suitable compensation.
Connection Diagram
Figure 1. 8-Lead SOIC - Top View
See D Package
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1997–2013, Texas Instruments Incorporated