Parallel current mode control using a direct duty cycle algorithm with low computational requirements to perform power factor correction
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United States of America Patent
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Apr 7, 2009
Grant Date -
May 29, 2008
app pub date -
Dec 5, 2007
filing date -
Jun 4, 2004
priority date (Note) -
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Abstract
A method and apparatus to implement parallel current mode control that is suitable for digital and analog implementation. A duty cycle algorithm is composed of a voltage term and a parallel current term which depends on the inductor current change between the inductor current value at the beginning of a switching cycle and the reference inductor current value at the end of that switching cycle. Parallel current mode control can be applied to all DC-DC converters, including both non-isolated and isolated topologies. It can also be applied to AC-DC converters with power factor correction.
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