Flat as a ….. transformer

Payton America Inc., Deerfield Beach, Fla., was at ECCE with its planar transformers and inductors for high frequency converters. These devices differ radically from conventional
magnetics in that they do not use magnet wire. Instead, windings are copper-foil lead frames or flat copper spirals laminated onto thin dielectric substrates. These windings are stacked on flat low-profile ferrite “E” cores that are glued together with fine grain epoxy. Thin mylar, Kapton or high-temperature Nomex films provide the necessary inter-winding insulation.