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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)311-316
Journal / PublicationIEEE Transactions on Power Electronics
Issue number3
Publication statusPublished - May 2001


Very small manually wound transformers for subwatt 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 counter-parts in low-power applications. The diameter of the coreless PCB transformer is merely 0.46 cm. The converter's power output is about 0.5W 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.

Research Area(s)

  • Coreless PCB transformers, Low-power converters, Low-profile converters, Megahertz switching, Packaging, Passive components