Diagnose LEDs by Monitoring the Switch-Mode Duty Cycle
关键词: high-brightness LEDs, HBLEDs, forward voltage, differential measurments, LED drivers, comparators
Abstract: A change in the forward voltage (VF) for a string of series-connected, high-brightness LEDs (HB LEDs) can indicate deterioration or complete failure of one or more of the LEDs. Accordingly, this circuit assesses the LED's health by monitoring VF.
Diagnose LEDs by Monitoring the Switch-Mode Duty Cycle.pdf
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