Efficient electrically-isolated power circuits with application to light sources
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United States of America Patent
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Jan 1, 2013
Grant Date -
Sep 20, 2012
app pub date -
May 28, 2012
filing date -
Oct 26, 2009
priority date (Note) -
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Abstract
Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency.
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