LM386N [Texas Instruments]

LM386N Description

The LM386N is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 tokeep external part count low, but the addition of an externalresistor 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 voltsupply, making the LM386N ideal for battery operation.

LM386N Features

Minimum external parts
Low quiescent current drain of 4mA
Self centring output quiescent voltage
Wide supply voltage range from 4V to 12V
Output power is 325mW at VS=6V and RL=8W
Voltage gain is 26db at VS=6V and f=1KHz
Bandwidth (BW) of 300KHz
Power supply rejection ratio (PSRR) is 50dB
Low distortion of 0.2%
Operating temperature range 0°C to 70°C

LM386N Applications

TV sound systems
Line drivers
Intercoms
Ultrasonic drivers
Small servo drivers
Power converters
AM-FM radio amplifiers
Portable tape player amplifiers