DUAL INTERLEAVED FLYBACK CONVERTER FOR HIGH INPUT VOLTAGE
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United States of America Patent
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Issued Date -
Mar 18, 2010
app pub date -
Jun 16, 2009
filing date -
Jun 16, 2008
priority date (Note) -
Abandoned
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Abstract
An integrated magnetic flyback converter includes interleaved phases that can be connected in series for an input stage and in parallel for an output stage. An integrated magnetic core has legs with gaps that may weaken a coupling between a primary and secondary of the associated transformer. The primary and secondary of the transformer may be inversely coupled for each phase. The transformer leg gaps permit each phase to be operated with a duty cycle ratio greater than 50%. The interleaved converter has reduced output current ripple, reduced input component voltage stress, reduced magnetizing inductance, reduced magnetic component physical size and reduced common integrated magnetic core current spikes.
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