ON Semiconductor Introduces Integrated Power Factor Controller with Resonant Controller


Device includes all the features needed to implement a highly efficient, small form factor adapter

APPLIED POWER ELECTRONICS CONFERENCE (APEC) – Washington, D.C. – Feb. 16, 2009 – ON Semiconductor (Nasdaq: ONNN) today introduced the NCP1901, an integrated circuit that combines both a power factor correction (PFC) controller and a resonant half-bridge controller in a single package. The high level of integration of the NCP1901 permits off-line adapters to be designed with minimal form factor while meeting worldwide efficiency standards, such as ENERGY STAR® v2.0 for external power supplies, California Energy Commission (CEC), European Code of Conduct and China Standard Certification Center (CSC).

The advantage of the NCP1901 is the unique combination of a PFC controller operating in a critical conduction mode (CRM) and a resonant half-bridge controller. Overall voltage regulation is maintained by adjusting the PFC output voltage. This allows a fixed frequency resonant controller to be utilized, reducing the transformer size and maximizing efficiency.

With ON Semiconductor’s proprietary high voltage technology, the NCP1901 reduces the number of external discrete components, minimizing board footprint. The resonant controller has an integrated half-bridge driver rated at 600 volts (V), eliminating the need for an external driver or gate drive transformer. A 600 V startup circuit allows direct connection to the bulk capacitor, improving efficiency at light loads through the omission of startup resistors.

Combining both controllers in a single package ensures correct sequencing and operation between the PFC and half-bridge stages. This allows robust power supplies with key protection features, including open feedback loop, and PFC overvoltage and undervoltage protection, to be designed quickly while still maintaining design flexibility.

“The NCP1901 provides a best in class solution for off-line adapters,” said Bill Schromm, senior vice president and general manager of ON Semiconductor’s Computing and Consumer Group. “The integration level achieved translates directly into a smaller form factor. When combined with the higher efficiency of the resonant controller, in either full load or no-load conditions, additional size and cost can be saved through reduction of components and heatsinks.”

Packaging and Pricing
The NCP1901 is priced at $1.95 per unit in 2,500-unit quantities, in Pb-free and RoHS compliant SOIC-16 or SOIC-20 packages.
For additional technical information visit https://www.onsemi.com or contact Chance Dunlap at Chance.Dunlap@onsemi.com.

About ON Semiconductor
With its global logistics network and strong product portfolio, ON Semiconductor (NASDAQ: ONNN) is a preferred supplier of high performance, energy efficient, silicon solutions to customers in the power supply, automotive, communication, computer, consumer, medical, industrial, mobile phone, and military/aerospace markets. The company’s broad portfolio includes power, analog, DSP, mixed-signal, advance logic, clock management, non-volatile memory and standard component devices. Global corporate headquarters are located in Phoenix, Arizona. The company operates a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions. For more information, visit https://www.onsemi.com.

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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.

About onsemi

onsemi (Nasdaq: ON) is driving disruptive innovations to help build a better future. With a focus on automotive and industrial end-markets, the company is accelerating change in megatrends such as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. With a highly differentiated and innovative product portfolio, onsemi creates intelligent power and sensing technologies that solve the world’s most complex challenges and leads the way in creating a safer, cleaner, and smarter world.


onsemi and the onsemi logo are 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 website in this news release, information on the website is not to be incorporated herein.

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