20-MHz 1.8-W DC-DC Converter With Parallel Microinductors and Improved Light-Load Efficiency

被引：15
|
作者：
Feeney, Ciaran [1 ]
Wang, Ningning [2 ]
Mathuna, Sean Ciano O. [2 ]
Duffy, Maeve [1 ]
机构：
[1] NUI Galway, Power Elect Res Ctr, Galway, Ireland
[2] Tyndall Natl Inst, Microsyst Ctr, Cork, Ireland
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2015年 / 30卷 / 02期
关键词：
DC-DC converters; PFM; inductors-on-silicon; light-load efficiency; microfabricated; microinductor; thin-film inductors; MICROFABRICATED INDUCTORS; MICRO-INDUCTORS; POWER; SILICON;
D O I：
10.1109/TPEL.2014.2309393
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：
The purpose of this paper is to show that distributing microinductors in parallel can reduce light-load losses, while also maintaining the same overall footprint area and the same effective inductance as a single microinductor. The performance of parallel microinductors is compared in a number of configurations to demonstrate which configuration provides the best overall performance in terms of circuit size, conversion efficiency, and power handling. Light-load saving techniques are implemented demonstrating the potential of parallel inductors to improve efficiency at light-load. Measured and modeled results of efficiency versus load are presented for the prototype DC-DC converters explored, and a peak efficiency of 74% is predicted for a 1.8 W, 20-MHz DC-DC converter including microinductors.
引用
收藏
页码：771 / 779
页数：9
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