Dimming control method and apparatus for led light source

摘要: A light emitting diode (LED) source, LED driver circuitry and methods for controlling the brightness of an source are presented. In some embodiments, control circuit receives a dimming command signal to dim modulates continuous direct current (DC) level determines that predetermined threshold has been reached. At this time, process includes initiating fixed pulse width generator (PWG) having duty cycle, automatically adjusting amplitude its nominal level, decreasing while PWG is active achieve commanded lower source.