2W audio power amplifier circuit of LM380

Published:2011/6/29 0:55:00 Author:chopper | Keyword: 2W, audio power amplifier | From:SeekIC

The picture is a 2W audio power amplifier circuit.This circuit adopts 14 pinned LM380 as the amplifier.Add the input signal to the inverting input end(pin 6) of operational amplifier LM380 through the volume control potentiometer Rp(20kΩ) and 22μF coupling capacitor and its in - phase input end (pin 2) is used to earth,pin 1 is circumscribed with 10μF filter capacitor to eliminate the high frequency ripple interference.The circuit adopts 16V single power supply,and circumscribes a 470μF decoupling capacitor between supply end(pin 14) and ground.Between the output end(pin 8) and ground there are two parallel branches.



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