Delete comment from: Ken Shirriff's blog
Excellent post! From what you described, I believe there is a legitimate safety concern to use Apple iPhone charger in countries with 220Vac mains electricity. The Y1 capacitor is only rated at 250Vac, that's less than 14 percent of voltage redundancy. In reality the power grid may be poorly regulated such as in some remote regions and the mains voltage can go as high as 250Vac, leaving zero safety redundancy on the sole Y1 capacitor.
Is Apple iPhone charge certified for transient immunity standards, such as IEC61000-4-x? and does it has protection features like OVP, OLP, SCP?
Aug 2, 2013, 1:08:49 AM
Posted to Apple iPhone charger teardown: quality in a tiny expensive package