Voltage coupling using powerMOS transistors

Telecommunication systems are becoming more and more compact and reliable. These requirements also apply to power converters. Reliability and compactness require an improvement in conversion efficiency and sometimes voltage distribution redundancy. This redundancy is typically performed by an “OR-ing diodes”, at considerable energy loss. To correct this problem, coupling diodes can be replaced by a low Rdson powerMOS that are saturated and associated with control electronics that blocks them if there is a fault. The authors first examine the circuitry associated with these techniques. Then, they discuss the choice of components and their capacities, and finally they consider their advantages and disadvantages