Dual switcher flyback structure for LED driver
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United States of America Patent
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Apr 26, 2016
Grant Date -
Aug 13, 2015
app pub date -
Nov 22, 2014
filing date -
Feb 12, 2014
priority date (Note) -
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Abstract
Driver circuits to reduce or remove flicker of SSL devices are presented. A controller for a power converter which converts electrical power at an input voltage into electrical power at an output voltage is described. The controller is configured to determine whether the input voltage is greater or smaller than a pre-determined voltage threshold; to operate a first switcher stage to transfer electrical power from the input of the power converter to the output of the power converter, during a first time period when the input voltage is greater than the pre-determined voltage threshold; and to operate a second switcher stage to transfer electrical power from the reservoir capacitor to the output of the power converter, during a second time period when the input voltage is smaller than the pre-determined voltage threshold.
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