Title :
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
fDate :
5/1/2001 12:00:00 AM
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;
Journal_Title :
Power Electronics, IEEE Transactions on
