Coreless printed circuit board (PCB) transformers with high power density and high efficiency

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)943-944
Journal / PublicationElectronics Letters
Issue number11
Publication statusPublished - 25 May 2000


The authors report the use of a coreless printed circuit board transformer for power conversion with very high power density and efficiency. A coreless PCB transformer with an outermost radius of ∼1 cm and 19 turns for both the primary and secondary windings can transfer 19W at an efficiency of 90%, resulting in a record power density of 24W/cm2. The power density and energy efficiency of a coreless PCB transformer are higher than those of core-based microtransformers. Coreless transformers are simpler in structure, easier to implement in silicon wafer and cheaper than core-based planar transformers.

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