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Simple Amplifier Using LA 4440 IC

admin May 3, 2010 5 Comments

Circuit Description

Circuit diagram of 19 Watt amplifier using LA 4440 has been published here. This amplifier circuit is based on the IC LA 4440 developed by Sanyo. In this circuit, amplifier IC LA 4440 acts as bridge amplifier. This IC has an extra feature that is protection against thermal, over voltage and short circuits. Adequate heat sinks should be provided for this IC in PCB.

12 V DC power supply is used for powering this circuit. The power supply used should be able to deliver a current of 3A at least. This IC can with stand up to 25 V but it is safe to use up to 16V. A 4 ohm speaker is used here as load. This speaker load can be 8 ohm but in that case output power will become half of that with 4 ohm speaker.

Circuit Diagram

Amplifier using LA 4440 ic

Amplifier using LA 4440 ic

LA 4440 Specifications

la 4440 specifications

la 4440 specifications

Notes

  • Use a good quality PCB to assemble components for this circuit. Carefully understand the specifications of LA 4440 given above.
  • This amplifier can deliver a 19 W Rms on a 4 Ohm speaker.
  • The IC LA 4440 also incorporates an audio muting function but it is not required in this circuit.
Comments
  • August 16, 2010

    Simple Amplifier Using LA 4440 IC…

    This amplifier circuit is based on the IC LA 4440 developed by Sanyo. In this circuit, amplifier IC LA 4440 acts as bridge amplifier……..

  • nene
    November 14, 2010

    good work

  • I really like what you’re saying about security here. it makes total sense Thanks so much for giving it the attention it deserves

  • AR.Mathavan
    July 16, 2011

    i want some java related projects

  • AR.Mathavan
    July 16, 2011

    hh

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