LM386 Audio Power Amplifier

Low Voltage Audio Power Amplifier learn more.

Part number : LM386

Functions : Audio Power Amplifier

Package information : DIP 8 Pin, SOIC 8 Pin

Manufacturer : TI, National Semicondcutor

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LM386 Audio Power Amplifier



LM386 is an integrated circuit (IC) widely used as a low-power audio amplifier.

LM386 operates from a single power supply and performs the function of amplifying the input signal and passing it to the output. This allows you to amplify sound from small audio devices or speakers.

The device internally has components such as a voltage amplifier, a current amplifier, and an output pin that can be connected to an output speaker. This amplifies the input signal and transmits it to the output speaker.

It is used in a variety of applications including portable audio devices, radios, and amplifier modules. Additionally, it has an internal gain control pin, allowing the user to adjust the degree of amplification desired.

The LM386 is a power amplifier designed for use in low voltage 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 up to 200.

The inputs are ground referenced while the output is automatically biased 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



1. Battery operation

2. Minimum external parts

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

4. Low quiescent current drain: 4 mA

5. Voltage gains from 20 to 200

6. Ground referenced input

7. Self-centering output quiescent voltage

8. Low distortion



1. AM-FM radio amplifiers

2. Portable tape player amplifiers

3. Intercoms

4. TV sound systems

5. Line drivers

6. Ultrasonic drivers

7. Small servo drivers

8. Power converters

Useful External Link

1.  LM386 – Wikipedia


LM386 PDF Datasheet


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