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设计基于L6561的高功率因数回扫转换器的综合考虑
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2009-05-31
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Three different configurations that an L6561-based
flyback converter can assume have been identified.
They are illustrated in fig. 1.
Configurations a) and b) are basically conventional
flyback converters. The former works in TM (Transition
Mode, i.e. on the boundarybetween continuous
and discontinuous inductor current mode), therefore
at a frequency depending on both input voltage and
output current. The latter works at a fixed frequency,
imposed by the synchronisation signal, and is therefore
completely equivalent to a flyback converter
based on a standardPWM controller.
flyback converter can assume have been identified.
They are illustrated in fig. 1.
Configurations a) and b) are basically conventional
flyback converters. The former works in TM (Transition
Mode, i.e. on the boundarybetween continuous
and discontinuous inductor current mode), therefore
at a frequency depending on both input voltage and
output current. The latter works at a fixed frequency,
imposed by the synchronisation signal, and is therefore
completely equivalent to a flyback converter
based on a standardPWM controller.
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