Design and optimization of a high insulation voltage DC/DC power supply with coreless PCB transformer

In this work the design and optimization of a DC/DC half-bridge converter with a coreless PCB transformer and high insulation voltage is presented. The analysis starts by computing coreless transformer magnetic parameters (i.e. auto and mutual inductance of the coils) through a simple Matlab^® function. The procedure is applicable to both circular and rectangular spiral coils. These results were used to model the half bridge converter, and obtain the output V-I characteristic and the maximum output power. Detailed experimental results on a 4 W laboratory prototype confirmed theoretical predictions.