ASDA 12W (100W) LED filament lamp teardown. (with schematic)

I got a couple of these from ASDA (UK Walmart) because I was interested to see how they managed to fit a fairly high power supply into the small base.
I'm travelling with work at the moment, so this video is slight less thorough than normal and will sound and look different.
The lamp uses six long filaments wired as three parallel pairs in series. The light output is very impressive, although the heat generated by the LED filaments is uncomfortably high. I prefer to use a cluster of smaller lamps for higher intensity, but this lamp is clearly aimed at replacing a classic 100W lamp.
The circuitry is based around a mysterious buck converter chip that may have the name of the inventor on it.

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