LM386

Low Voltage Audio Power Amplifier

General Description

The LM386 is a power amplifier designed for use in low volt-

age 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 to any value from 20 to 200.

The inputs are ground referenced while the output automati-

cally biases to one-half the supply voltage. The quiescent

power drain is only 24 milliwatts when operating from a 6 volt

supply, making the LM386 ideal for battery operation.

Features

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Battery operation

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Minimum external parts

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Wide supply voltage range: 4V–12V or 5V–18V

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Low quiescent current drain: 4mA

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Voltage gains from 20 to 200

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Ground referenced input

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Self-centering output quiescent voltage

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Low distortion: 0.2% (A

125mW, f = 1kHz)

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Available in 8 pin MSOP package

Applications

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AM-FM radio amplifiers

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Portable tape player amplifiers

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Intercoms

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TV sound systems

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Line drivers

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Ultrasonic drivers

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Small servo drivers

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Power converters

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

© 2000 National Semiconductor Corporation

DS006976

www.national.com