3. Diode bridge test schematic for Case 1. The inductors provide dc isolation, with a coupling coefficient of 1. Diodes D1, D2, D3, and D4 are identical, modeled with a zero-bias junction ...

One solution to cutting the diode power loss is to use the LT4320 (Fig. 2) that controls a bridge of four N-channel MOSFETs. The LT4320 operates with inputs of 9 V to 72 VDC or 12 V/ 24 AC.