Component identification (led driver)

[vinicius.jlantunes]

Hope someone here can help me identify this component.

It is in a LED driver circuit from a small 5W light fixture. The code in the package is 26453 (and 9420 at the top which I suspect is a the fab date?).

The schematic is very simple, also attached. When fed with 127VAC it's output is ~170 VDC. I believe it is a constant current LED driver or a regulator wired as a constant currrent source. What caught my eye though is the fact that it can take a high input voltage (basically rectified and filtered mains, no transformer).

I have salvaged 6 of these from a dumpster and the LED's are fried in 5 of them, but I want to reuse the fixture and put new LED's on it. So I would like to reverse engineer the driver circuit and adjust accordingly.

The driver circuits seem to be all working, so I just wanted to see if I can adjust its current by changing the feedback resistor R1 so it matches whatever new LED's I put in it (most likely a small string of SMD LEDs that I have laying around, in series).

[amyk]

Winsemi WS9420.

Your schematic shows the diode backwards.

[vinicius.jlantunes]

Thanks!

And about the diode too, doh!