On 07/12/2010 01:52, M.L. wrote: > On Mon, Dec 6, 2010 at 7:45 PM, Tamas Rudnai wro= te: >> I thought that graph was *not* from an iPhone, but some Android one? Wha= t >> also Olin said is that solarwind would need to measure his iPhone and dr= aw >> that graphs to go any further from this point. >> > > And Russell said that the iPhone 3 has a linear regulator charge controll= er. > It's hard to believe the iPhone 4 would be drastically different, > considering the convenient 5v supply for charging the 4.2v lithium > battery. Is this an iPhone4? I was sure I'd seen a teardown of it somewhere online recently, thought=20 maybe that would be an idea to get info on the charging circuit if the=20 wish is to avoid testing with a bench supply (popular product, sure=20 there has to be someone that pulled it apart. (I found out below someone has and it doesn't help much anyway...) I have access to an iPhone 1 here I would be willing to test, but they=20 may have changed things since then. I believe they have from what I discovered - I think the iPhone 1 uses=20 an LTC 4066 IC - info here: http://tzywen.com/modules.php?name=3DNews&file=3Darticle&sid=3D696=20 This page might be of interest from Lady Ada: http://www.ladyada.net/make/mintyboost/icharge.html Seems the Apple stuff can get very picky about the datalines (similar to=20 my Omnia - had to hack a charger for that, would not simply charge from=20 any USB source) needing voltage dividers etc. I also found the iPhone4 uses this power management IC: Dialog D1815A 338S0867 Info from this page: http://www.isuppli.com/Teardowns-Manufacturing-and-Pricing/News/Pages/iPhon= e-4-Carries-Bill-of-Materials-of-187-51-According-to-iSuppli.aspx And this page: http://www.tgdaily.com/hardware-features/50344-the-real-iphone-4-teardown Could not find a datasheet for it though, so no idea about how it works... Looks like the bench supply test may be the only way to find out the=20 desired information... --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .