A low-profile power converter using printed-circuit board (PCB) power transformer with ferrite polymer composite

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

73 Scopus Citations
View graph of relations


Related Research Unit(s)


Original languageEnglish
Pages (from-to)493-498
Journal / PublicationIEEE Transactions on Power Electronics
Issue number4
Publication statusPublished - Jul 2001


A new design of low-cost and low-profile power transformer is presented in this paper. The manufacturing cost of a power transformer can be reduced using the proposed printed-circuit board (PCB) transformer. The transformer windings are etched on the opposite sides of a double-sided PCB. Self-adhesive ferrite polymer composite (FPC) sheets are stuck on the two PCB surfaces to shield the magnetic flux induced from the transformer windings. The PCB transformer does not require manual winding and bobbin. A power converter prototype employing the PCB transformer has been implemented. The technique of choosing the optimum switching frequency of the power converter using PCB transformer is addressed in this paper. The maximum power delivered from the prototype is 94 W. The maximum efficiency of the power converter is 83.5%.

Research Area(s)

  • Coreless printed-circuit-board transformers, Low-profile converter