Home SchematicsAudio LM380 audio amplifier circuit

LM380 audio amplifier circuit

by iainhendry

The LM380 is a power audio amplifier for consumer application. There are 2 versions an 8 pin DIP package and a 14 pin package where pins 3, 4 , 5 , 10, 11 and 12 are connected to ground and act as a form of  heatsink. The 14 pin package can supply about 2w, the 8 pin version about 0.7w.

In the schematic below you need to change the capacitors to 470uf for the 14 pin variant.


LM380 audio amplifier

LM380 audio amplifier

Parts List


QTY  PART-REFS           VALUE                      
---  ---------           -----                      
1    R1                  2.2r                                              

2    C1,C2               220uf                                             

Integrated Circuits
1    U1                  LM380                                             

1    LS1                 SPEAKER                                           
1    RV1                 10k



LM380 Datasheet

LM380 on Amazon UK

LM380 on Amazon US

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