资 源 简 介
Three different configurations that an L6561-basedflyback converter can assume have been identified.They are illustrated in fig. 1.Configurations a) and b) are basically conventionalflyback converters. The former works in TM (TransitionMode, i.e. on the boundarybetween continuousand discontinuous inductor current mode), thereforeat a frequency depending on both input voltage andoutput current. The latter works at a fixed frequency,imposed by the synchronisation signal, and is thereforecompletely equivalent to a flyback converterbased on a standardPWM controller.
