Saturday, March 29, 2014

1W Amplifier With TDA 7052

Good evening everyone. This post is about another small audio amplifier that provides around 1.2W of output power and it requires no external component which makes this circuit very easy to make. This circuit can be used with battery operated devices.


1. No external component needed,
2. Good overall stability,
3. Low power consumption,
4. No on/off click sound,
5. No heat-sink needed.
6. Low Total Harmonic Distortion(THD)
7. Large input voltage range of 3V-18V. 
8. Very low no load current.
9. Frequency Response 20Hz-20KHz.

Pin Configuration :

Very easy pin configuration. From the configuration you can see it works as a bridge amplifier.

Now lets see the diagram!

Circuit Diagram :

This diagram is very easy to understand. The pin 2 is used for the input of audio signal, 4.7Kohm variable resistor is used for controlling volume. A speaker is directly connected with the output. This circuit can be built on a small but good quality PCB. The capacitors with the voltage input section are for filtering. For battery operation these are not mandatory. The gain of this IC is internally fixed at 40dB.

As this circuit is designed to work with low voltage input it uses Bridge Tied Load Principle (BTL) provide around 1 or 2 Watt output power. 

Uses :

1. Small portable devices which is battery fed.

Notes :

To view the datasheet click here.

To read my other posts, click here.

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