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220V power supply LED lamp driver circuit

2016-08-08 09:23  
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220V power supply LED lamp driver circuit
In the circuit,C1,R1,piezoresistor,L1,R2 form the primary power supply filter circuit,it can be able to filter the input instant high voltage,C2,R2 form step-down circuit,C3,C4,L2 and piezoresistor form the filter circuit after rectifying. This circuit uses a dual filter circuit,it can effectively protect the LED not be breakdown and damage by instant high voltage.