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Audium Semiconductor has launched an audio power amplifier IC that, at normal listening levels, is claimed to be 20 times more efficient than competing devices without compromising audio quality.

The AS1001 operates from a nominal 1.5V power supply and delivers 100W peak power output.

As a result of the efficiency of the amplifier, battery-powered amplified loudspeakers can run for up to 10 months on a set of four ‘C’ batteries, playing for three hours per day, reducing CO2 from power generation and pollution from battery production, according to the company.

The amplifier also enables the development of smaller, cooler, mains-powered audio equipment with fewer heatsinks.

Applications include wireless speakers, home-theatre surround-sound speakers and battery-powered travel speakers.

Future Audium ICs will support MP3 docking stations and USB-powered speakers.

The AS1001 architecture uses patented techniques to minimise both fixed-power losses and output-dependant variable-power losses.

The modulation scheme uses low switching rates to minimise switching losses.

Power rail switching means that the amplifier operates efficiently from a low-voltage rail for much of the time, with a DC/DC boost converter driving higher-voltage transistors on extreme audio peaks.

Audium Semiconductor

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