This paper introduced the different solutions of 48Vin/12Vout DCDC converters at different power levels. The efficiency, bom, size and manufacture ability are discussed. According to this comparison, each solution can be a choice to meet different requirements. While the LLC implementation and switching capacitor approach shows better efficiency. LLC approach seems to have a best power density. Comparing to the implementation cost, multiphase buck converter has lowest implementation cost and can be embedded in the mother board. Its efficiency can be optimized with more GaN devices per phase leg and reduces the implementation area compared to its counterpart Si MOSFET.
