Reduced flicker driver circuit for LED systems
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United States of America Patent
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Feb 28, 2017
Grant Date -
Nov 3, 2016
app pub date -
Apr 30, 2015
filing date -
Apr 30, 2015
priority date (Note) -
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Abstract
LED systems and circuits for generating a driver output for powering one or more LED devices are provided. A dimmable driver circuit can include a controller configured to reduce output ripple current to reduce flicker over the dimming range of the LED system. The dimmable driver circuit can receive a dimming control signal (e.g. a 0V to 10V dimming control signal) over an isolated dimming interface to reduce leakage current at the dimming interface. In addition, a dual-switch flyback converter circuit can be employed to increase efficiency of the driver circuit as well as to reduce electromagnetic interference (EMI) with the LED devices, such as EMI resulting from differential mode noise.
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