Monday, November 24, 2008

2×22 W stereo amplifier

2×22 W stereo amplifier

About the Circuit

This is the circuit diagram of a powerful and good quality stereo amplifier using IC TDA 1554.Even though the circuit has only very few external components.The circuit delivers a 2×22 W out put on 4 Ohm speakers.The most great factor is that it operates from a 12 V power supply, which makes it ideal for car stereos.

My experience with the circuit

The circuit was designed as per the data sheet and so there was no room for error, and I found it working great.But it didn’t last long because I raised the power supply to 40V and the IC blowed up. Lesson : Don’t give more than 18V power supply to TDA1554!

Circuit Diagram & Parts


There is a lot of heat generated during the operation of IC , so it must be connected to a suitable heat sink. A small cabinet fan can also be used in addition for better cooling(not necessary)..The circuit draws about 6A current at 12 V at full out put power.So the power supply must be some thing that shoul be able to deliver more than 6A at 12 V.The maximum rated supply voltage for TDA 1554 is 18V.Do not give more than that.I recommend 12 V.


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