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14W Stereo Audio Amplifier
author: Rajkumar Sharma


This project is a 14W Stereo Audio Amplifier based on LM4730 IC.



Description


14W Stereo audio power amplifier build around LM4730 IC. The LM4730 is stereo audio amplifier capable of delivering typical 14W per channel of continues average output power a 4 Ohms or 8 Ohms load with less than 10% THD+N from  20Hz to 20Khz frequency. Each amplifier has an independent smooth transition fade-in/out mute and a power conserving standby mode which can be controlled by onboard slide switches.

 The LM4730 has short circuit protection and thermal shutdown feature that is activated when the IC temperature exceeds 150 centigrade. The LM4730 also has under voltage lock out feature for click and pop free power off and on. Amplifier required proper heat sink.

Applications

Audio Amplifier for High End Stereo TVs
Audio Amplifier for Component Stereo
Audio Amplifier for Compact Stereo
Audio Amplifier for PC
Audio Amplifier for Self Powered Speakers

Specifications

Outout Power into 4 Ohms or 8 Ohms , 14W
THD+N  10%
THD+N at 1Khz with 2X1W into 8Ohms 0.02%
Mute Attenuation 85dB
Standby Current 3.5mA (+/- 17V)
Dual power supply - 18 VDC
Less then 10% THD+N from 20 Hz - 20 KHz
Onboard slide switch for mute and standby mode
Terminal pins for connecting left and right audio signal inputs
Header connector for connecting Potentiometer (POT) for volume adjustment
Power Battery Terminal (PBT) for easy dual power supply and speakers connection
Power-On LED indicator

 


Schematic



Parts List


 

PCB



 
 

 
120x90 spot

 

 

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