National Semiconductor has released their Boomer single-chip audio amplifier for driving high-powered ceramic speaker drivers in mobile phones, laptops, and other mobile applications. Ceramic speakers have an advantage over traditional voice coil speaker drivers because, even though they require more voltage (but less current, which is the more important factor), they take up a lot less space – 4mm thickness for traditional speaker drivers compared to 0.7mm thickness for ceramic speaker drivers.
With a ceramic speaker load equivalent to 1 uF + 20-Ohms, the LM48555 provides a voltage drive of 15.7V peak-to-peak with less than 1 percent total harmonic distortion plus noise (THD+N). In addition, the LM48555’s tiny 12-bump micro SMD package has a footprint of 1.5 mm by 2.0 mm, making it possible for manufacturers to create ultra-thin, feature-rich handsets.
We can’t wait for the, high-powered speakers fitted to our ultra thin phones of the future!
via: cellularnews