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LM386
LM386 Low Voltage Audio Power Amplifier
Literature Number: SNAS545A
LM386
Low Voltage Audio Power Amplifier
General Description
The LM386 is a power amplifier designed for use in lowvoltage
consumer applications. The gain is internally set to 20 to
keep external part count low, but the addition of an external
resistor and capacitor between pins 1 and 8 will increase the
gain toany value from 20 to 200.
The inputs are ground referenced while the output automatically
biases to one-half the supply voltage. The quiescent
power drain is only 24 milliwatts when operating from a6 volt
supply, making the LM386 ideal for battery operation.
Features
n Battery operation
n Minimum external parts
n Wide supply voltage range: 4V–12V or 5V–18V
n Low quiescent current drain:4mA
n Voltage gains from 20 to 200
n Ground referenced input
n Self-centering output quiescent voltage
n Low distortion: 0.2% (AV = 20, VS = 6V, RL = 8W, PO =
125mW, f = 1kHz)
n Available in 8pin MSOP package
Applications
n AM-FM radio amplifiers
n Portable tape player amplifiers
n Intercoms
n TV sound systems
n Line drivers
n Ultrasonic drivers
n Small servo drivers
n Powerconverters
Equivalent Schematic and Connection Diagrams
DS006976-1
Small Outline,
Molded Mini Small Outline,
and Dual-In-Line Packages
DS006976-2
Top View
Order Number LM386M-1,
LM386MM-1, LM386N-1,LM386N-3 or LM386N-4
See NS Package Number
M08A, MUA08A or N08E
August 2000
LM386 Low Voltage Audio Power Amplifier
© 2000 National Semiconductor Corporation DS006976 www.national.com
AbsoluteMaximum Ratings (Note 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
SupplyVoltage
(LM386N-1, -3, LM386M-1) 15V
Supply Voltage (LM386N-4) 22V
Package Dissipation (Note 3)
(LM386N) 1.25W
(LM386M) 0.73W
(LM386MM-1) 0.595W
Input Voltage ±0.4V
Storage Temperature −65°C to...