TDA2822 Bridge Power Amplifier

This TDA2822 power amplifier circuit with bridge output works extremely well with radios, and this is the one I usually use with most of my radio projects. This extremely powerful amplifier can operate on low voltages (6 V) and efficiently drive a loudspeaker. An advantage of this IC is that it can amplify "raw" AF signals from a radio with ease, whilst other ICs tend to struggle.

With just a handful of components, it is possible to build it on a strip-board. A useful tip is to keep the number of connections to a minimum, and avoid the use of long jumper wires.

Circuit Layout and Build

It is such a simple circuit that it could be built in any number of ways. The build shown in the photographs was on perforated board; however, here is a nice neat layout for stripboard. Make the links nice and straight, and it will work a treat.

Parts List

Loudspeaker

For the loudspeaker, an 8 Ω (1-watt) spec works very well. Get a good quality one capable of producing sufficient bass and treble.

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