Control of asymmetric parallel synchronous rectifiers in power converter topologies

摘要

A power converter includes an input power source, a synchronous rectifier and a controller. The synchronous rectifier includes a plurality of actively controlled switches coupled in parallel and configured to rectify current delivered from the input power source to a load. The controller is operable to issue a first control signal for driving a first one of the actively controlled switches and issue a second control signal for driving a second one of the actively controlled switches. The first control signal is a different control signal than the second control signal so that the first actively controlled switch is controllable separately from the second actively controlled switch. The first actively controlled switch has a higher current-carrying capacity than the second actively controlled switch.