5.5W – 2 Channel Audio Amplifier

Rajkumar Sharma      http://www.rajkumarsharma.com  

394 

5.5W_2_Channel_Audio_Amplifier

This project is a 5.5W – 2 Channel Audio Amplifier based on LA4445 IC.

Description

The small 2 Channel amplifier constructed around Sanyo’s LA4445 IC delivers 5.5Watts +5.5 Watts at 4 ohm load, supply in 12V DC 2Amp, Input impedance 30K.

Specifications

  • Dual Channels output : 5.5W
  • Minimum External Parts
  • Very small pop noise at the time of power supply ON/OFF
  • Good ripple rejections
  • Small residual noise
  • Built-in protectors 1. Thermal Protector 2. Overvoltage Surge Protector
  • Standard Audio signal
  • Supply 12V DC
  • Load : 4 Ohms Speaker on Each Channel
  • Voltage Gain : 50DB
  • Output 5.5W on each Channel (THD 10%)
  • Total harmonic distortion 1% Max @ Po=1W
  • Input impedance 30 K-ohms

Schematic

5.5W_2_Channel_Audio_Amplifier_Schematic

Parts List

5.5W_2_Channel_Audio_Amplifier_BOM

 

PCB

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