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Microsemi Adds DRF1200/CLASS-E Reference Design Kit for 1000W CLASS-E RF Generators

February 19, 2008

IRVINE, Calif., Feb. 19, 2008 (PRIME NEWSWIRE) — Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed signal integrated circuits and high reliability semiconductors, has introduced a new solid state 1KW, Single-Ended, CLASS-E reference design kit based on Microsemi’s DRF1200 Driver/MOSFET hybrid.

The reference design kit enables the design engineer to immediately evaluate an 86% efficient 1000W CLASS-E RF generator. It provides an essential tool for developing high-power, high-voltage RF generators, optimizing efficiency and power densities for plasma generation, switch mode power amplifiers, pulse generators, ultrasound transducer drivers and acoustical optical modulators.

KEY FEATURES

    -- 1000 Watts Output Power  -- 86% Efficient CLASS-E Operation  -- 13.56 MHz Switching Frequency  -- Up to 320V Supply Voltages  -- Internal MOSFET Rated at 1000V BV(DSS)  -- Low Cost System Design  -- Solid State Transition for Tube Amplifiers 

CLASS-E amplifiers offer a degree of efficiency unavailable with linear designs. The trade-off has been the high level of design complexity that engineers have either shied away from or spent months discovering the fundamentals of practical CLASS-E amplifier design. With the DRF1200/CLASS-E reference design kit an engineer can rapidly overcome the pitfalls of high voltage CLASS-E design. It demonstrates fundamental design techniques that can save months of countless design iterations.

Using the DRF1200 Hybrid as the core of the design, the reference amplifier enables performance previously unachievable with solid state CLASS-E amplifiers. The DRF1200 hybrid combines a driver, high voltage MOSFET and internal bypass capacitors making it a highly efficient, cost effective, high voltage solution.

The driver combined with optimally-located bypass capacitors is capable of driving high voltage MOSFETs at over 30MHz. The 1000V MOSFET enables higher voltage applications, greatly simplifying output matching and reducing the complexity of the output combining networks.

The kit includes the designer’s application note, discussing the progression through various output voltages while identifying proper output waveforms necessary for the safe transition to the maximum 1KW, 925V peak output voltage. It also demonstrates efficiencies as high as 95% that can be achieved at lower voltages. The kit’s circuit board comes fully assembled and mounted to a machined heatsink. It demonstrates the supply bypassing and high power inductor construction required for high power CLASS-E designs.

The DRF1200/CLASS-E is extremely versatile. After evaluating the 1KW generator design with the preloaded 1000V, 13A DRF1200 driver, an application can be easily modified for different power requirements using either 1000V, 26A DRF1201 or 500V, 50A DRF1202 hybrids.

The high power reference design features the DRF1200 hybrid in an air cavity-flangeless package for improved reliability over conventional plastic encapsulated packaging. Constructed with materials having closely matched CTEs maximizes system reliability by alleviating the stress between components during power cycling. Typical applications have demonstrated in excess of 1 million cycles with power densities of 700W/square inch. The flangeless package design also reduces cost by eliminating expensive copper-tungsten flanges typically found in high power RF packages.

The DRF1200/CLASS-E Reference Design Kit is available now with a unit price of $1,333.00. Samples of the DRF1200, DRF1201 and DRF1202 are available now. The DRF1200 is available for a unit price of $143.49 in 100 piece quantities. All devices are available through the factory or authorized Microsemi distributors.

About Microsemi Corporation

Microsemi, with corporate headquarters in Irvine, California, 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, optimizing battery performance, reducing size or protecting circuits. The principal markets the company serves include defense, commercial air, satellite, medical, notebook computers, LCD TVs, mobile, and 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.primenewswire.com/newsroom/prs/?pkgid=1233

PLEASE READ THE FOLLOWING FACTORS THAT CAN MATERIALLY AFFECT MICROSEMI’S FUTURE RESULTS.

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995: Any statements set forth in the news release that are not entirely historical and factual in nature are forward-looking statements, including without limitation statements concerning our expectations regarding our business outlook, our performance and competitive position during the coming year, visibility into our customer demand, and any other statements of belief or about our plans or expectations. These forward-looking statements are based on our current expectations and are inherently subject to risks and uncertainties that could cause actual results to differ materially from those expressed in the forward-looking statements. The potential risks and uncertainties include, but are not limited to, such factors as changes in generally accepted accounting principles, the difficulties regarding the making of estimates and projections, the hiring and retention of qualified personnel in a competitive labor market, acquiring, managing and integrating new operations, businesses or assets, uncertainty as to the future profitability of acquired businesses, delays in the realization of any accretion from acquisition transactions, any circumstances that adversely impact the end markets of acquired businesses, difficulties in closing or disposing of operations or assets, difficulties in transferring work from one plant to another, rapidly changing technology and product obsolescence, difficulties predicting the timing and amount of plant closure costs, the potential inability to realize cost savings or productivity gains and to improve capacity utilization, potential cost increases, weakness or competitive pricing environment of the marketplace, uncertain demand for and acceptance of the company’s products, adverse circumstances in any of our end markets, results of in-process or planned development or marketing and promotional campaigns, changes in demand for products, difficulties foreseeing future demand, effects of limited visibility of future sales, potential non-realization of expected orders or non-realization of backlog, product returns, product liability, and other potential unexpected business and economic conditions or adverse changes in current or expected industry conditions, business disruptions, epidemics, health advisories, disasters, national emergencies, wars or potential future effects of the tragic events of September 11, 2001, political instability, currency fluctuations, variations in customer order preferences, fluctuations in market prices of the company’s common stock and potential unavailability of additional capital on favorable terms, difficulties in implementing company strategies, dealing with environmental or other regulatory matters or litigation, or any matters involving litigation, contingent liabilities or other claims, difficulties and costs imposed by law, including under the Sarbanes-Oxley Act of 2002, difficulties in determining the scope of, and procuring and maintaining, adequate insurance coverage, difficulties and costs of protecting patents and other proprietary rights, work stoppages, labor issues, inventory obsolescence and difficulties regarding customer qualification of products, manufacturing facilities and processes, and other difficulties managing consolidation or growth, including in the maintenance of internal controls, the implementation of information systems, and the training of personnel. In addition to these factors and any other factors mentioned elsewhere in this news release, the reader should refer as well to the factors, uncertainties or risks identified in the company’s most recent Form 10-K and all subsequent Form 10-Q reports filed by Microsemi with the SEC. Additional risk factors may be identified from time to time in Microsemi’s future filings. The forward-looking statements included in this release speak only as of the date hereof, and Microsemi does not undertake any obligation to update these forward-looking statements to reflect subsequent events or circumstances.

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

This news release was distributed by PrimeNewswire, www.primenewswire.com

 CONTACT:  Microsemi Corporation           Financial Contact:           David R. Sonksen, Executive Vice President and CFO             (949) 221-7101           Editorial Contact:           Cliff Silver, Manager, Corporate Communications             (949) 221-7112 



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