LM380 audio amplifier circuit

19,093

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.

Schematic

LM380 audio amplifier
LM380 audio amplifier

Parts List

 

QTY  PART-REFS           VALUE
---  ---------           -----
Resistors
---------
1    R1                  2.2r
Capacitors
----------
2    C1,C2               220uf
Integrated Circuits
-------------------
1    U1                  LM380
Miscellaneous
-------------
1    LS1                 SPEAKER
1    RV1                 10k

Links

 

LM380 Datasheet

LM380 on Amazon UK

LM380 on Amazon US

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