Control data determination from primary-side sensing of a secondary-side voltage in a switching power converter
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United States of America Patent
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Apr 12, 2016
Grant Date -
Dec 6, 2012
app pub date -
Jun 1, 2012
filing date -
Jun 3, 2011
priority date (Note) -
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Abstract
A power distribution system includes controller of a switching power converter to control the switching power converter and determine one or more switching power converter control parameters. In at least one embodiment, the controller determines the one or more switching power converter control parameters using a resonant period factor from a reflected secondary-side voltage and an occurrence of an approximate zero voltage crossing of the secondary-side voltage during a resonant period of the secondary-side voltage. In at least one embodiment, the switching power converter control parameters include (i) an estimated time of a minimum value of the secondary-side voltage during the resonant period and (ii) an estimated time at which a current in the secondary-side of the transformer decayed to approximately zero.
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