Performance Comparison of Miniaturized Isolation Transformer Topologies

Seven different miniaturized low-power isolation transformer topologies are analyzed using FEA simulation. Performance optimizations of fixed-area transformers with different operation frequencies and heights, with and without magnetic cores, are performed. The comparison of optimization results reveals performance potential and trade-offs of the different topologies under different restrictions. More than 1 W of power transfer is possible at more than 85% efficiency in $\mathbf{1}\ \text{mm}^{2}$ of footprint area for several different topologies.