Delete comment from: Ken Shirriff's blog
I am the OB2263 Anonymous.
I've designed a 60W flyback converters using this controller and it worked perfectly, even with synchronous rectification (using FAN6204). The 30W "limit" is only a ball park recommendation - people mostly design on flyback topology at this power levels. All you need to use OB2263 up to a 100W flyback is a properly designed flyback coupled inductor ("transformer") with proper snubber and a good MOSFET.
So I believe the PSU could easily spit out the advertised 45W. I would say that if a bit of more thought would have been given to the design, it would be in fact better than the original overly complicated (and not very reliable) Apple PSU.
Cheers!
Tomas
Mar 24, 2016, 7:55:05 PM
Posted to Counterfeit Macbook charger teardown: convincing outside but dangerous inside