A novel phase shedding scheme for improved light load efficiency of Interleaved DC/DC converters

Author

Su, Jen-Ta ; Hung, Chung-Wen ; Chang, Tsun-Hsi ; Liu, Chih-Wen

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2011

fDate

6-11 March 2011

Firstpage

1482

Lastpage

1487

Abstract

In this paper, a novel phase shedding scheme for Interleaved DC/DC converters is proposed to improve the light load efficiency. The proposed phase shedding architecture is based upon gain scheduling method to automatically tune the parameters of Power MOSFETs such as the on resistance (R_{ds_on}) for optimization in light load efficiency with power saving. The proposed scheme is verified on 12 V input with 1.2 V output, 40 A 2-phases interleaved DC/DC synchronous buck converter and the experimental results are presented to demonstrate the theoretical analysis. The experimental results show that using the proposed scheme significant improvement in light load efficiency.

Keywords

DC-DC power convertors; power MOSFET; scheduling; 2-phase interleaved DC-DC synchronous buck converter; current 40 A; gain scheduling method; light load efficiency; phase shedding scheme; power MOSFET; voltage 1.2 V; voltage 12 V; DC-DC power converters; Junctions; Logic gates; MOSFETs; Temperature; Temperature measurement; dc/dc converters; gain scheduling; light load efficiency; phase shedding;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE

Conference_Location

Fort Worth, TX

ISSN

1048-2334

Print_ISBN

978-1-4244-8084-5

Type

conf

DOI

10.1109/APEC.2011.5744788

Filename

5744788