Phase control for hysteretic controller
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United States of America Patent
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Jun 18, 2013
Grant Date -
Jun 25, 2009
app pub date -
Dec 18, 2008
filing date -
Dec 21, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A driver circuit, and light emitting system and method are provided. The driver circuit includes possibly a controller and a phase detector coupled to produce an intermittent output proportional to a value of an input relative to upper and lower threshold values, and a difference between the input signal, which is the intermittent output signal, and a reference value. The light emitting system can include a switch and at least one light emitting device coupled to the switch. The driver circuit can be coupled to forward the intermittent output signal to the switch that is active in proportion to current level through the light emitting device, rising and falling between the modifiable upper and lower threshold values.
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