Book excerpt: The dual active bridge isolated dc-dc converter is the most widely chosen converter for high-power density bidirectional power flow applications with its inherent galvanic isolation and ease of realizing soft-switching capabilities[1]. Modern power electronics often have to sustain higher ranges of loads and especially for applications like Point of Load (POL) regulators and data-centre specific applications where the conversion ratio is very high and also the converter lives in light load conditions for a significant part of its lifetime. In such converters the light load efficiency improvements without effecting the full-load conditions, thereby improving the overall efficiency of the converter is critical. One key learning for a converter design is that it is crucial when learning about more advanced converter topologies to understand the science behind how it works and especially understanding the design trade-offs. The proposed converter architecture proposed in this thesis illustrates a 48-1.8V single conversion with an input-series-output-parallel (ISOP) architecture. The attractive features of the converter are (a) light load efficiency improvements without impacting the full-load efficiency, (b) single-switch resonant gating design for a full-bridge inverter (c) data driven design strategy for the converter topology