Linked by Thom Holwerda on Mon 21st May 2012 21:12 UTC
Hardware, Embedded Systems "Disassembling Apple's diminutive inch-cube iPhone charger reveals a technologically advanced flyback switching power supply that goes beyond the typical charger. It simply takes AC input (anything between 100 and 240 volts) and produce 5 watts of smooth 5 volt power, but the circuit to do this is surprisingly complex and innovative." Quite fascinating, although I'm not sure just how much the mentioned advantages really matter beyond bragging rights.
Thread beginning with comment 518922
To read all comments associated with this story, please click here.
Ripoff piece of common tech
by RawMustard on Tue 22nd May 2012 04:46 UTC
RawMustard
Member since:
2005-10-10

There are millions of these produced everyday. They're in every CFL light globe you buy. They're also in the new LED lights you can buy these days. You can also get the the circuit from a multitude of online suppliers for less than a couple of bucks. So why are they so expensive? Because soon as you put a picture of an apple with a bite taken out of it on it, you can times the cost by fifty!

So what's so "technologically advanced" about it?

Reply Score: 1

RE: Ripoff piece of common tech
by daedalus on Tue 22nd May 2012 07:19 in reply to "Ripoff piece of common tech"
daedalus Member since:
2011-01-14

I dunno, maybe it's in comparison to the basic chargers which used to come with the cheapest phones - they were just a transformer, a couple of diodes and a capacitor. No regulation, no filtering. I don't know if they're still around though...

Reply Parent Score: 1

RE: Ripoff piece of common tech
by Sjon on Tue 22nd May 2012 07:44 in reply to "Ripoff piece of common tech"
Sjon Member since:
2012-04-12

You should really read the previous post on his blog for comparison:

http://www.arcfn.com/2012/03/inside-cheap-phone-charger-and-why-you...

Reply Parent Score: 1

RE: Ripoff piece of common tech
by claudix on Tue 22nd May 2012 09:51 in reply to "Ripoff piece of common tech"
claudix Member since:
2012-05-22

I agree you.
There's no hi-tech feature in this circuit at all... All of these are common electronic components in a common switching power supply design. Delivering 5VDC up to 5W is fairly easy to achieve. Otherwise compare my laptop's power supply that delivers 18V @ 6.5A (117W): it is not much bigger than the iPhone's charger (considering its high power features).

The only innovation I see is the fact of distributing components along the 3 dimensions instead of distributing them in 2 dimensions, as usual.

Reply Parent Score: 1