ON Semiconductor’s open ATX reference design meets the ENERGY STAR performance requirements for ATX power supplies used in desktop PCs scheduled to take effect this July. The reference design delivers efficiency that exceeds the ENERGY STAR requirements under all specified load conditions. Additionally, the ATX reference design meets IEC61000-3-2 power factor requirements.
ON Semiconductor’s reference design achieves full-load efficiency of 86.5% at high-line and 82.5% efficiency at 20% of load and low-line. This reduces power losses by approximately 50% compared to currently used supplies that achieve only 70% efficiency. ON Semiconductor has a complete documentation package for the ATX reference design, including description, schematics, bill-of-materials, Gerber files and evaluation guidelines. The documentation package is available at www.onsemi.com/ATX.