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

页码：771 / 779

页数：9

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