Can somebody tell me, what is that component and what is its function(see the attached photo)?
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Don't leds need DC instead AC voltage?That is an AC operated LED luminaire. The IC controls the number of LED in a series string to adjust the string voltage to keep the current constant, and ensure a unity power factor.
The four lead component marked DB1 is a full wave bridge rectifier which takes the AC and converts it to DC.Don't leds need DC instead AC voltage?