Microsemi Extends Line of Filter-Less Class-D Audio Amplifiers Into Stereo for Portable Speakers, Multi-Media Players and Notebook PC Applications


IRVINE, Calif., Nov. 8, 2006 (PRIMEZONE) -- Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed signal integrated circuits, has announced the addition of two new stereo amplifiers to its line of Class-D audio amplifiers targeted for low system cost and maximum battery life in notebook PCs and other handheld or portable audio applications.



      --  Can drive up to 2 watts stereo output power
      --  Highly integrated design in single compact package
      --  Optimized for low system cost, long battery life
      --  Minimum external components

Designated the LX1702(tm) and LX1704(tm), the two new amplifiers employ CMOS designs optimized for low voltage, low power operation, low EMI, and minimum system costs. As few as five external components are needed in a typical stereo system.

The LX1702 provides 1 watt stereo output power into 8-ohm speakers with a total harmonic distortion (THD) of less than 1% over a full 20Hz to 20kHz high fidelity audio reproduction. The LX1704 increases output power to 2 watts into 4-ohm speakers.

"Like our award-winning LX1701(tm) mono amplifier -- the first in our family of CMOS designs -- these two new stereo devices require no output filters," said Paul Bibeau, Senior Vice President and General Manager of Microsemi's Integrated Products Group. "We believe these devices offer the easiest, most space-conserving and lowest-cost approach for adding quality stereo sound to handheld applications," he added.

A very low quiescent current of 1.2 milli-amps per channel in standby mode and less than 1uA in shut-down mode results from a proprietary output modulation design, further lowering battery consumption demands.

Their wide 2.5 to 5.5 supply voltage range allows both amplifiers to be used at almost all power supply or battery conditions. Slew-rate-controlled PWM outputs make quieter switching and the low EMI performance allows circuit board placement close to interference-sensitive circuits such as audio and video receivers.

Both the LX1702 and LX1704 are delivered in low profile, surface-mountable 16-pin MLPQ packages measuring only 4 mm square and 1 mm high that are RoHS compliant and Pb free. Both amplifiers are available for immediate sampling and delivery, with 10K quantity pricing at $0.78 for the LX1702 and $0.85 for the LX1704. Complete technical information is available on the Microsemi Web site, www.Microsemi.com. Samples and evaluation boards can be requested through this site, from Microsemi sales representatives or through Microsemi's distribution sales channel.

About Microsemi Corporation

Microsemi is a leading designer, manufacturer and marketer of high performance analog and mixed signal integrated circuits and high reliability semiconductors. The company's semiconductors manage and control or regulate power, protect against transient voltage spikes and transmit, receive and amplify signals.

Microsemi's products include individual components as well as integrated circuit solutions that enhance customer designs by improving performance and reliability, battery optimization, reducing size or protecting circuits. The principal markets the company serves included implanted medical, defense/aerospace and satellite, notebook computers, monitors and LCD TVs, automotive and mobile connectivity applications. More information may be obtained by contacting the company directly or by visiting its web site at http://www.microsemi.com.

The Microsemi Corporation logo is available at http://www.primezone.com/newsroom/prs/?pkgid=1233

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Investor Inquiries: David R. Sonksen, Microsemi Corporation, Irvine, CA (949) 221-7101.



            

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