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LM390N
LM390 1W Battery Operated Audio Power Amplifier
TL/H/7848
LM390
Battery
Operated
Audio
Power
Amplifier
April 1995
LM390 1W Battery Operated Audio Power Amplifier
General Description
The LM390 Power Audio Amplifieris optimizedfor6V, 7.5V, operationintolow impedance loads.The gainis internal-setat20to keepthe external part count low,butthe
additionofan external resistorand capacitor between pinsand6wil increasethe gaintoany valueupto 200.The
inputsare ground referenced whilethe outputis automati-
cally biasedtoonehalfthe supply voltage.
Features Battery operation 1W output power Minimum external parts Excellent supply rejection Ground referenced input Self-centering output quiescent voltage Variable voltage gain Low distortion Fourteenpin dual-in-line package
Applications AM-FM radio amplifiers Portable tape player amplifiers IntercomsTV sound systems Lamp drivers Line drivers Ultrasonic drivers Small servo drivers Power converters
Equivalent Schematic and Connection Diagrams
TL/H/7848–1
Dual-In-Line Package
TL/H/7848–2
Order Number LM390N
SeeNS Package Number N14A
C1995National SemiconductorCorporation RRD-B30M115/PrintedinU.S.A.
