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ON Semi ATX reference design meets 80 PLUS requirements

Posted: 31 Aug 2005 ?? ?Print Version ?Bookmark and Share

Keywords:on semiconductor? atx reference design? 80 plus?

ON Semiconductor unveiled what it touts as the industry's first open ATX reference design certified to meet 80 PLUS performance requirements for computing applications. According to the press release, the 250W reference design addresses all functional blocks of the ATX power supply, including power factor correction, switch-mode power supply control and regulation, post regulation, and output rectification.

"This certified 80 PLUS ATX reference design demonstrates our commitment to delivering leading-edge power-efficient solutions to assist power supply designers in their quest to develop highly efficient power supplies," said Andy Williams, VP of ON Semi's Power Conversion Division. "We have worked closely with industry standards organizations and our customers worldwide to develop this economical 80 PLUS compliant power solution."

ATX reference design

ON Semi prepared a complete documentation package for the ATX reference design, including description, schematic, bill-of-materials, Gerber images and evaluation guidelines. The documentation package is available at the company's website, as well as the verification and testing report, links to relevant industry information (80 PLUS program, IEC1000-3-2 requirements, ATX 12 V form factor) and other supporting information.

The key products included in the reference design are:

? NCP1653!a compact power factor correction (PFC) controller that is designed for continuous conduction mode (CCM) PFC applications;

? NCP1280!an active clamp controller suitable for the switch mode power supply (SMPS) section of the ATX power supply;

? NCP1014!a highly integrated regulator ideal for implementation in the standby/bias converter section of the ATX power supply;

? NCP4330!a synchronous post-regulator that replaces the mag-amp post regulator to provide higher efficiency in the output section of the ATX power supply; and

? NTD110N02R and NTP65N02R!low RDS(on) N-channel MOSFETs that provide the pulse width modulation as part of the NCP4330 post regulator.

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