750 W High Efficiency and Soft-Switching Off-Line 12 V Converter

Author

Bucheru, Bogdan T. ; Jitaru, Ionel Dan

Author_Institution

Delta Energy Syst. (Arizona), Tucson, AZ

fYear

2009

fDate

15-19 Feb. 2009

Firstpage

1492

Lastpage

1496

Abstract

The paper presents an innovative off-line low profile converter design that delivers 750 W of power at 95%-96% efficiency for nominal input range, using variable frequency topology with high frequency zero voltage switching (ZVS) and zero current switching (ZCS) for primary switchers. Theoretical considerations and practical results are presented for high frequency and high voltage soft-switching. The goal of the design is to maintain a reasonable temperature rise of the multi-layer PCB board while delivering 750 W power in a reduced volume and low cost. The resulting product increases more than twice the power density compared to the standard two stages 400 V to 12 V power converters and outperforms other one stage solutions in a 125times70 mm² footprint with only a 18 mm profile.

Keywords

printed circuits; switching convertors; zero current switching; zero voltage switching; ZCS; ZVS; frequency zero voltage switching; multilayer PCB board; nominal input range; power 750 W; power converters; soft-switching off-line converter; variable frequency topology; voltage 400 V to 12 V; zero current switching; Costs; Frequency conversion; Inductors; Power transformers; Prototypes; Resonance; Switching converters; Topology; Zero current switching; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE

Conference_Location

Washington, DC

ISSN

1048-2334

Print_ISBN

978-1-4244-2811-3

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2009.4802864

Filename

4802864