Apple Switchmode PSU Really That Special ? - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: May 24, 2012, 04:12:25 pm
content: gizmodo sing the praises of apples switch mode power supply is really that special ?its just a switch mode power supply isn't it ?http://www.arcfn.com/2012/05/apple-iphone-charger-teardown-quality.html

author: zaoka
author_rank: Frequent Contributor
timestamp: May 24, 2012, 04:38:58 pm
content: I used to fix Apple power supplies for a guy that does Apple warranty. These always had problems with capacitors. Often it uses small capacitors with large capacity so installing a substitute was real challenge.

author: codeboy2k
author_rank: Super Contributor
timestamp: May 24, 2012, 06:30:25 pm
content: Quote from: Sionyn on May 24, 2012, 04:12:25 pmI read the article. Yes, it's a standard switch mode fly-back converter design; that's nothing special. The author is praising the efforts made to increase safety, improve EMI, and that no corners were cut, as is often the case in so many wall wart type switchmode chargers/power supplies. The number of filters, snubbers, and amount of shielding is non-standard for a wall wart.And that they did all that in 1 cubic inch.

author: FenderBender
author_rank: Super Contributor
timestamp: May 24, 2012, 11:03:09 pm
content: I mean it is pretty cool how small it is. Like others have said, it's not anything special as far as the circuit goes, but they did it right in a small package. Now I'm pretty sure it's like $30 but that's just part of buying something with a tree fruit on it.

author: HackedFridgeMagnet
author_rank: Super Contributor
timestamp: May 24, 2012, 11:22:01 pm
content: What's with the Y1 capacitor, doesn't that just negate all the isolation?Anyone know its breakdown voltage of Y1?I don't think he actually told us the efficiency, except at no load.Or if it ran hot like my Dell Laptop power supply does.

author: Bored@Work
author_rank: Super Contributor
timestamp: May 24, 2012, 11:34:37 pm
content: Quote from: HackedFridgeMagnet on May 24, 2012, 11:22:01 pmThe Y indicates it should be a Y class cap - self healing, flame retardant, falling open when failing.Of course, cheap wall warts come with fake Y caps. Another reason not to trust that 50ct cheapy.

author: T4P
author_rank: Super Contributor
timestamp: May 24, 2012, 11:45:45 pm
content: Not when they cost so much more, well, it's not like only apple does it.Other manufacturers come to mind ... every tech website these days have bias towards to apple and samsung so don't be too surprised

author: chavotronic
author_rank: Contributor
timestamp: May 25, 2012, 12:30:19 am
content: Why are people commenting in the net that this is sooooo innovative??I'ts a pretty normal circuit to me.Nothing extremely innovative in my eyes..

author: EEVblog
author_rank: Unknown
timestamp: May 25, 2012, 01:23:01 am
content: Yeah, nothing special at all.Itiswell designed and made, but plenty of other companies do the same.When you compare a well design and built one with a OneHungLow special, it's like chalk and cheese.Dave.

author: Monkeh
author_rank: Super Contributor
timestamp: May 25, 2012, 01:37:58 am
content: I've got equally compact and well designed supplies from Nokia, Samsung, Amazon..Just a fixed, low-current SMPSU. Nothing to see here, move along Apple fanboys.

author: T4P
author_rank: Super Contributor
timestamp: May 25, 2012, 07:12:21 am
content: Quote from: Monkeh on May 25, 2012, 01:37:58 amQuote from: EEVblog on May 25, 2012, 01:23:01 amMy hereos ... my hatred for apple is undocumented ...

author: BravoV
author_rank: Super Contributor
timestamp: May 25, 2012, 10:21:23 am
content: Huh ... Samxon cap ? Definitely not the 1st tier type.