Improving the efficiency and dynamics of 3D integrated POL

Author

Dongbin Hou ; Yipeng Su ; Qiang Li ; Lee, Fred C.

Author_Institution

ECE Dept., Virginia Polytech. & State Univ., Blacksburg, VA, USA

fYear

2015

fDate

15-19 March 2015

Firstpage

140

Lastpage

145

Abstract

The 3-Dimensional (3D) integrated non-uniform flux inductor has shown good performance in achieving high power density and high efficiency in Point of Load (POL) module design. In this work, both single-phase and two-phase coupled non-uniform flux inductors are designed to build an 18A POL module with a QFN package. The non-uniform flux inductor´s unique property of varying core loss at different load conditions is analyzed, and the two-phase coupled inductor design that considers both efficiency and dynamics is demonstrated. The module evaluation shows improvement in efficiency and power density in comparison to conventional design.

Keywords

inductors; integrated circuit packaging; three-dimensional integrated circuits; 3D integrated POL; 3D integrated nonuniform flux inductor; QFN package; point of load module design; power density; single-phase coupled nonuniform flux inductors; two-phase coupled nonuniform flux inductors; Core loss; Inductance; Inductors; Loss measurement; Magnetic cores; Permeability; Three-dimensional displays;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE

Conference_Location

Charlotte, NC

Type

conf

DOI

10.1109/APEC.2015.7104344

Filename

7104344