ON Semiconductor Announces Post Regulation, Dual N-Channel MOSFET Driver That Delivers Improved Efficiency for ATX and SMPS Power Supplies

The New NCP4330 Provides a More Efficient Way to Convert a 3.3 V Output from a 5 V Power Train Than Commonly Utilized Magnetic Amplifier Control Circuits

SHANGHAI, China—(BUSINESS WIRE)—March 16, 2005— A leading global supplier of power conversion solutions, ON Semiconductor (Nasdaq: ONNN) today announced the NCP4330 -- a post regulation, dual N-Channel MOSFET driver that delivers improved efficiency when implemented in forward converters most commonly found in ATX and high-power switch mode power supplies (SMPS).

The NCP4330 features drive outputs for series FETs and free-wheeling synchronous FETs, to deliver higher efficiency than silicon rectifiers generally used for this purpose. When compared to traditional magnetic amplifier control circuit solutions, this device offers more compact and cost-effective implementation. The device offers an efficient means of deriving 3.3 volt (V) or other outputs from the 5 V power train, while not requiring additional windings or terminals on the power supply's power transformer. The secondary alternating current (AC) signal directly feeds the NCP4330 to minimize power dissipation, while reducing the power circuit's overall part count.

The overlap management technique offered in the NCP4330 allows soft switching -- which results in efficient higher frequency operation. As such, this device is ideal for power supplies operating at frequencies up to 400 kilohertz (kHz). This would include the new generation of ATX as well as Telecom DC-DC converters. Finally, this device integrates under voltage lockout and thermal shutdown for rugged designs.

"The NCP4330 is yet another device from ON Semiconductor that provides designers with an effective tool to help them meet increasingly more stringent efficiency requirements in ATX power supplies," said Andy Williams, ON Semiconductor vice president of Power Conversion Products. "To develop this device we drew from our industry experience and technical expertise in achieving 80plus power efficiency."

Conference Paper

ON Semiconductor plans to present an application paper on the NCP4330 titled, "An Efficient Subregulator for Outputs of Forward Converters," written by Charles E. Mullet at the PCIM China 2005 conference to be held in Shanghai, China from March 15-17.

Package and Pricing

NCP4330 is offered in the SOIC-8 package, and is priced at $0.90 per unit in 1,000-unit quantities. Production is planned for the second quarter. For additional information visit www.onsemi.com/tech or contact Marc Barboni at marc.barboni@onsemi.com.

About ON Semiconductor

With its global logistics network and strong portfolio of power semiconductor devices, ON Semiconductor is a preferred supplier of power solutions to engineers, purchasing professionals, distributors and contract manufacturers in the computer, cell phone, portable devices, automotive and industrial markets. For more information, please visit ON Semiconductor's Web site at http://www.onsemi.com.

ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its Web site in this news release, such information on the Web site is not to be incorporated herein.

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