LED lamp innards

LED lamp innards

This topic has 1 reply, 1 voice, and was last updated 18 October 2020 at 15:32 by Roger Hart.

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18 October 2020 at 15:32 #502023
Roger Hart
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@rogerhart88496
Had trouble with 20W led bench lamp flickering, been that way a long time, finally swapped lamp and chopped open the offending item. Cut away the grey goop potting stuff and…

Inside is a typical power supply based around a BD3216 chip. A close look shows the mains fuse ended in a dry joint with a black burn mark. Also L3 the buck inductor is missing, it came away with the potting – it too seemed a bit cooked. The mucky soldering on the led assembly is original.

From a quick trace of the circuit the transformer is part of the Vcc power supply and feedback loop.

Now to think of a use for it…
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18 October 2020 at 15:32 #32146
Roger Hart
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