What is that component and what is its function

Ian0

Joined Aug 7, 2020
3,760
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.
 

Thread Starter

Martiio

Joined Apr 2, 2020
43
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.
Don't leds need DC instead AC voltage?
 

MisterBill2

Joined Jan 23, 2018
9,823
The LEDs do get a DC voltage because there is a bridge rectifier, full wave, item BR1 , the 4 legged black square towards the top of that PCB. The other two devices are switching controllers. They regulate for a constant current.
 
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