On Semi 255W ATX电源参考设计方案

On Semi(安森美)公司的 255W ATX电源参考设计方案具有80 PLUS认证的开放式设计,在50%负载和230V与240Vac时效率高达90%,而在50%负载和100V与115Vac时效率大于88%.本文介绍了该参考设计的详细性能,包括ATX电源参考设计简化方框图和详细电路图以及各个部分的材料清单,包括主板(PFC级, 同步整流输出级)材料清单, DC-DC 转换器级和监视级材料清单, HB 谐振LLC级材料清单等.

High-Efficiency 255 W ATX Power Supply Reference Design
ON Semiconductor was the first semiconductor company to provide an 80 PLUS-certified open reference design for an ATX power supply in 2005. A second generation 80 PLUS-certified open reference design with improved efficiency was then introduced in 2007. ON Semiconductor is now introducing its third generation 80 PLUS-certified open reference design with a drastic efficiency improvement. This is a 255 W multi-output power supply for the ATX form factor. Achieving a maximum efficiency of 90% at 50% load, and at 230 and 240 Vac, this third generation reference design achieves >88% efficiency at 50% load, and 100 and 115 Vac. All efficiency measurements were obtained at the end of a 41 cm (16 in.) cable, ensuring the design can be used ‘as is’ in all standard desktop PC configurations...

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