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Home › Magazines › 2009 › June › Power in the pocket, part 1

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Power in the pocket, part 1

a simple PWM amplifier

Published in issue 390, June 2009

Power in the pocket, part 1
There are plenty of designs for simple audio power amplifiers. These generally have a class-AB or class-B topology. Here we present a very compact class-D design that can be powered from four AA batteries and because of its relatively high efficiency can elicit quite a few decibels from a loudspeaker.

Extra info, Updates

Components

Technical specifications
- 1 W into 8 O, 1.7 W into 4 
- Class-D
- Power supply 6 to 9 V (4x AA cell)
- Very compact
- Simple construction without SMDs

Click below to download a PDF copy of this article from Elektor magazine.

 

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Magazine June 2009
UK390 (USD 6.70)
 

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Control board, bare
080277-1
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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