LM390 1W Battery Operated Audio Power Amplifier
April 1995
LM390 1W Battery Operated Audio Power Amplifier
General Description
The LM390 Power Audio Amplifier is optimized for 6V 7 5V
9V operation into low impedance loads The gain is internal-
ly set at 20 to keep the external part count low but the
addition of an external resistor and capacitor between pins
2 and 6 wil increase the gain to any value up to 200 The
inputs are ground referenced while the output is automati-
cally biased to one half the supply voltage
Y
Y
Y
Y
Self-centering output quiescent voltage
Variable voltage gain
Low distortion
Fourteen pin dual-in-line package
Applications
Y
Y
Y
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Battery operation
1W output power
Minimum external parts
Excellent supply rejection
Ground referenced input
AM-FM radio amplifiers
Portable tape player amplifiers
Intercoms
TV sound systems
Lamp drivers
Line drivers
Ultrasonic drivers
Small servo drivers
Power converters
Equivalent Schematic and Connection Diagrams
Dual-In-Line Package
TL H 7848 鈥?2
Order Number LM390N
See NS Package Number N14A
TL H 7848 鈥?1
C
1995 National Semiconductor Corporation
TL H 7848
RRD-B30M115 Printed in U S A
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