Where a wide input voltage range and electrical isolation are necessary, the power designer is challenged to increase output power while reducing size. For standard ‘brick’ converters, the maximum output power achievable is directly limited by the maximum power loss that can be extracted at the given ambient with forced air cooling, making the thermal considerations every bit as important as the electrical losses. But a first pass comparison between using eGaN FETs and MOSFETS can be done by simply comparing power loss and efficiency.