Low cost high power factor LED driver
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United States of America Patent
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Jul 2, 2013
Grant Date -
Oct 18, 2012
app pub date -
Apr 18, 2011
filing date -
Apr 18, 2011
priority date (Note) -
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Abstract
A controller for a power supply having a primary side and a secondary side includes a mapping circuit for generating a feedback signal corresponding to an output current of the secondary side, a power switch coupled to the primary side for conducting a connection according to a modulation signal, a constant current block, for generating a first current signal according to the feedback signal; and a control unit, for generating the modulation signal to control the power switch according to the first current signal.
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