| The growth in battery-operated media-enabled
consumer devices has exploded in the last few years. For these
consumer products, high quality sound capabilities, coupled with
very low power consumption is critical. Class D audio amplifiers,
such as ST’s new TS4962M, offer the highest efficiency with
the lowest number of components – making them attractive
solutions for all mobile applications.
Class D amplifiers offer some serious advantages as compared
to class AB audio amplifiers:
- Very high efficiency, rating of up to 90%. This translates
simply into a much more powerful audio signal for the same power
consumption used for an equivalent class AB circuit. Or conversely,
much lower power consumption for any given audio volume.
- Class D topology also offers a simplified, filter-free circuit
design, leading to a lower total component count for any given
application.
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