LED DRIVER WITH EXTENDED DIMMING RANGE AND METHOD FOR ACHIEVING THE SAME
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United States of America Patent
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Issued Date -
Jul 31, 2014
app pub date -
Jan 31, 2013
filing date -
Apr 14, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A circuit for powering of a Light Emitting Diode (LED) string has a switching power converter. A brightness control circuit is coupled to the switching power converter to allow a duration of a conductive state of the power converter to exceed a duration of a conductive state of the LED string for maintaining a current magnitude in the LED string constant.
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