With the improvement of people's awareness on energy saving,many lamps are not with only one brightness level,they need to be able to adjustable to meet different brightness at different periods.There are many dimming methods,such as front and rear cut dimming,l-10 V dimming,digital dimming,etc.What this article mentioned is the 1-10 V dimming method.In order to raise the threshold of dimmable LED power driver,international giants require products entering the European Union have to pass the control side EMI.This was a challenge for our company at the first,but we easily cross this threshold after carefully studied and knew the principle well.
1-10 V dimmingEMIcommon mode rejectionferrite core impedance-frequency characteristics
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