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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
About The Author
Will Park
Will hails from The City of Angels - Los Angeles, California. He spends his time playing with his numerous gadgets and looking forward to seeing what future holds for mobile technology. An avid promoter of a fully "digital" life, he promotes the widespread adoption of truly mobile, paper-less living. He dreams of the day when he can go completely digital. No more snail mail, paper receipts, bound books, notepads/spiral notebooks, credit cards, hard currency. He's a digital warrior - fighting for the converged life. He is an idealist and a realist - he has a perfect view of what the world should be but knows that the world is not perfect. Can we ever hope to see Will's dream become reality? We'll see...
