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LM4880
Dual 200 mW Audio Power Amplifier with Shutdown Mode
TL/H/12343
LM4880
Dual
Audio
Power
Amplifier
with
Shutdown
Mode
November 1995
LM4880
Dual 250 mW Audio Power Amplifier with Shutdown Mode
General Description
The LM4880isa dual audio power amplifier capableofde-
livering typically250mWper channel ofcontinuous average
powertoan8X load with 0.1% (THD) usinga5V power
supply.
Boomer audio power amplifiers were designed specifically provide high quality output powerwitha minimal amount external components using surface mount packaging.
Sincethe LM4880 doesnot require bootstrap capacitorsor
snubber networks,itis optimally suitedfor low-power porta-
ble systems.
The LM4880 featuresan externally controlled, low-power
consumption shutdown mode,aswellasan internal thermal
shutdown protection mechanism.
The unity-gain stable LM4880canbe configured byexternal
gain-setting resistors.
Key Specifications THDat1 kHzat200 mW continuous average
output powerinto8X 0.1% (max) THDat1 kHzat85mW continuous average
output powerinto 32X 0.1% (typ) Output powerat 10% THDa Nat1kHz
into8X 325mW (typ) Shutdown Current 0.7mA (typ)
FeaturesNo bootstrap capacitorsor snubber circuitsare
necessary Small Outline (SO)andDIP packaging Unity-gain stable External gain configuration capability
Applications Headphone Amplifier Personal Computers CD-ROM Players
Typical Application Connection Diagram
TL/H/12343–1
FIGURE1. Typical Audio Amplifier Application Circuit
Small Outlineand
DIP Packages
TL/H/12343–2
Top View
Order NumberLM4880Mor
LM4880N
SeeNSPackage
Number M08AforSONS Package
Number N08E forDIP
BoomerÉ Audio Power Amplifier Series
*Refertothe Application Information sectionfor information concerning proper selectionoftheinput andoutput coupling capacitors.
BoomerÉisaregistered trademarkof National SemiconductorCorporation.
C1995National SemiconductorCorporation RRD-B30M125/PrintedinU.S.A.
