Teardown of a Philips 2W LED GU10 lamp. скачать в хорошем качестве

Teardown of a Philips 2W LED GU10 lamp.

I bought this Philips lamp expecting it to have a switching converter inside to drive the LEDs, but it actually uses a fairly chunky capacitive dropper to limit the current through four large LEDs that I think contain four chips each. The most unusual things about this design are the use of two parallel current limiting capacitors to make up an odd value to suit the load, the four chip LEDs and the use of a small inductor for transient suppression. I'll apologise for inadvertently saying the 56 ohm resistors were in series when they're in parallel to make an equivalent resistance of 28 ohms. I also managed to give the inductors rating in Farads at one point. DOH!