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LM4861-LM4861M/NOPB-LM4861MX/NOPB
1/2-W 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
Checkfor Samples: LM4861
1FEATURES DESCRIPTIONThe LM4861 isa bridge-connected audio power
No output coupling capacitors, bootstrap amplifier capable of delivering 1.1Wof continuous
capacitors,or snubber circuits are necessary average powerto an 8Ω 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 specificallyto provide high quality output power witha
minimal amount of external components using
• Unity-gain stablesurface mount packaging. Since the LM4861 does
• External gain configuration capability not require output coupling capacitors, bootstrap
capacitors,or snubber networks,itis 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 gainsofto 10 without the useof external compensation
KEY SPECIFICATIONScomponents. Higher gains may be achieved with
• THD+N for 1kHzat 1W continuous average suitable compensation.
output power into 8Ω 1.0% (max) Output powerat 10% THD+Nat 1kHz into 8Ω
1.5W (typ) Shutdown Current 0.6µA (typ)
Connection Diagram
Figure1. 8-Lead SOIC- Top View
SeeD Package
