Build Audio Amplifier With LM380

Wednesday, April 21st, 2021 - Audio

The LM380 is a power audio amplifier for consumer applications. In order to hold system cost to a minimum, gain is internally fixed at 34 dB. A unique input stage allows ground referenced input signals. The output automatically selfcenters to one-half the supply voltage. The output is short circuit proof with internal thermal limiting. The package outline is standard dual-in-line. The LM380N uses a copper lead frame. The center three pins on either side comprise a heat sink. This makes the device easy to use in standard PC layouts.

Circuit Of Audio Amplifier With LM380

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Aplication Of Audio Amplifier With LM380

Uses include simple phonograph amplifiers, intercoms, line drivers, teaching machine outputs, alarms, ultrasonic drivers, TV sound systems, AM-FM radio, small servo drivers, power converters, etc.

Features Of Audio Amplifier With LM380

  • Wide supply voltage range: 10V-22V
  • Low quiescent power drain: 0.13W (VS= 18V)
  • Voltage gain fixed at 50
  • High peak current capability: 1.3A
  • Input referenced to GND
  • High input impedance: 150kΩ
  • Low distortion
  • Quiescent output voltage is at one-half of the supply voltage
  • Standard dual-in-line package

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