Design-Oriented Analysis and Performance Evaluation of Buck PFC Front End

被引:142
作者
Huber, Laszlo [1 ]
Gang, Liu [2 ]
Jovanovic, Milan M. [1 ]
机构
[1] Delta Prod Corp, Power Elect Lab, Res Triangle Pk, NC 27709 USA
[2] Delta Elect Shanghai Co Ltd, Shanghai Design Ctr, Shanghai 201209, Peoples R China
关键词
Boost converter; buck converter; clamped-current control; power factor correction (PFC); single-phase rectifier;
D O I
10.1109/TPEL.2009.2024667
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In universal-line ac/dc converters that require power factor correction (PFC), maintaining a high efficiency across the entire line and load ranges poses a major challenge. Typically, a boost PFC front end exhibits 1%-3% lower efficiency at 100-V line compared to that at 230-V line. It is shown in this paper that a buck PFC front end with an output voltage in the 80-V range can maintain a high efficiency across the entire line and load ranges. A thorough analysis of the buck PFC converter operation and performance along with design optimization guidelines are presented. Experimental results obtained on a 90-W notebook adapter are provided. A loss analysis based on SIMPLIS and PSPICE simulations is also included. Major factors that contribute to the improved efficiency of the buck PFC versus the boost PFC are briefly explained.
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页码:85 / 94
页数:10
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