A low-profile low-power converter with coreless PCB isolation transformer

Author

Tang, S.C. ; Hui, S.Y. ; Shu-hung Chung, Henry

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China

Volume

16

Issue

3

fYear

2001

fDate

5/1/2001 12:00:00 AM

Firstpage

311

Lastpage

315

Abstract

Very small manually wound transformers for sub-watt DC-DC converters are notorious for their relatively high cost and low reliability. In this paper, an isolated low-profile low-power 8 MHz soft-switching power converter using a coreless printed circuit board (PCB) transformer is described. Coreless PCB transformers eliminate several problems of their core-based counterparts in low-power applications. The diameter of the coreless PCB transformer is merely 0.46 cm. The converter´s power output is about 0.5 W with a typical transformer efficiency of 63%. The high-frequency capability, high reliability and the low-profile structure make coreless PCB transformers a viable and attractive option for reliable mega-hertz switching converters and micro-circuits

Keywords

DC-DC power convertors; power transformers; printed circuits; switching circuits; transformer windings; 0.46 cm; 0.5 W; 63 percent; 8 MHz; coreless PCB isolation transformer; high-frequency capability; low-profile low-power converter; mega-hertz switching converters; micro-circuits; printed circuit board; reliability; soft-switching power converter; sub-watt DC-DC power converters; transformer efficiency; very small manually wound transformers; Circuit faults; Costs; Ferrites; Magnetic cores; Magnetic materials; Packaging; Printed circuits; Switching converters; Transformer cores; Wounds;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.923762

Filename

923762