6561设计公式AN1059 APPLICATION NOTE DESIGN EQUATIONS OF HIGH-POWER-FACTOR FLYBACK CONVERTERS BASED ON THE L6561by Claudio AdragnaDespite specific for Power Factor Correction circuits using boost topology, the L6561 can be successfully used to control flyback converters. Among the various configurations that an L6561-based flyback converter can assume, the high-PF one is particularly interesting because of both its peculiarity and the advantages it is able to offer. AC-DC adapters for mobile or office equipment, off-line battery chargers and low-power SMPS are the most noticeable examples of application that this configuration can fit. This paper describes the equations governing such a kind of flyback converter with the aim of providing a number of relationships useful to the system designer.INT……
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