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What is LM390?

This electronic component, produced by the manufacturer "National Semiconductor", performs the same function as "LM390 1W Battery Operated Audio Power Amplifier".


LM390 Datasheet PDF - National Semiconductor

Part Number LM390
Description LM390 1W Battery Operated Audio Power Amplifier
Manufacturers National Semiconductor 
Logo National Semiconductor Logo 


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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
Features
Y Battery operation
Y 1W output power
Y Minimum external parts
Y Excellent supply rejection
Y Ground referenced input
Y Self-centering output quiescent voltage
Y Variable voltage gain
Y Low distortion
Y Fourteen pin dual-in-line package
Applications
Y AM-FM radio amplifiers
Y Portable tape player amplifiers
Y Intercoms
Y TV sound systems
Y Lamp drivers
Y Line drivers
Y Ultrasonic drivers
Y Small servo drivers
Y Power converters
Equivalent Schematic and Connection Diagrams
Dual-In-Line Package
TL H 7848 – 1
TL H 7848 – 2
Order Number LM390N
See NS Package Number N14A
C1995 National Semiconductor Corporation TL H 7848
RRD-B30M115 Printed in U S A

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LM390 equivalent
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Typical Applications (Continued)
FIGURE 6(a) Amplifier with Bass Boost
TL H 7848 – 10
TL H 7848 – 11
FIGURE 6(b) Frequency Response
with Bass Boost
FIGURE 7 Intercom
TL H 7848 – 12
FIGURE 8 AM Radio Power Amplifier
TL H 7848 – 13
Note 1 Twist supply lead and supply ground very tightly
Note 2 Twist speaker lead and ground very tightly
Note 3 Ferrite bead is Ferroxcube K5-001-001 3B with 3 turns of wire
Note 4 R1C1 band limits input signals
Note 5 All components must be spaced very close to IC
5


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Featured Datasheets

Part NumberDescriptionMFRS
LM390The function is LM390 1W Battery Operated Audio Power Amplifier. National SemiconductorNational Semiconductor
LM390The function is LM390 1W Battery Operated Audio Power Amplifier (Rev. A). Texas InstrumentsTexas Instruments
LM3900The function is LM2900/LM3900/LM3301 Quad Amplifiers. Texas InstrumentsTexas Instruments

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