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. I suppose the chip has these markings since it is being created for Flextronics. The "EB936" marking to the chip might be Flextronics' own aspect quantity, or perhaps a day code. [eight] I assumed Flextronics was just an electronics assembler and I used to be stunned to know that Flextronics does loads of impressive progress and it has practically thousands of patents.
The board they use is way from The most cost effective possible - its a glass epoxy double sided board, as compared to laminated paper solitary sided, additive process (set copper where by needed, as an alternative to etch absent in which not) board that you would possibly locate inside a superior quantity toy, or your TV's remote control.
When earth ground is disconnected from your switching electric power provide, the Y cap connected to Are living brings the situation from the PC to line potential.
Nameless: superior catch about the IRFP250 MOSFETs around the schematic. That's just an mistake since I picked the incorrect schematic symbol. They are really 1HNK60 600V MOSFETs.
Is there another benifits whit Apples charger than the filter for touch screen Review towards the Samsung power supply you dismantled?
Superb put up! From what you explained, I feel there is a genuine protection problem to make use of Apple apple iphone charger in nations with 220Vac mains electrical energy. The Y1 capacitor is only rated at 250Vac, that is under fourteen % of voltage redundancy.
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Good report. Pretty insightful . I am not technically intellect nevertheless I found this a good study. I"ve choose away with me some new awareness. I is going to be a far better educated shopper Any more.
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About the secondary board, the lower voltage AC with the transformer is rectified because of the large-pace Schottky diode, filtered by the inductor and capacitors, and connected to the USB output. The tantalum filter capacitors offer higher capacitance in a small package.
lithium-ion and lithium-polymer batteries need a very demanding charging two/3 step technique which is usually cared for by a focused charging chip. I could have missed it within your teardown nonetheless it appears like Apple doesn't use these kinds of chip of their wall chargers.
Outstanding product review, Ken. Who would have believed this compact power supply bundled a controller IC that has a comments circuit for changing the output voltage? Which is wonderful in this type variable - a idea of my sombrero to Apple, but One more for you Ken for awesome analysis.
One more spot I often question about is the necessity for wall warts vs. setting up while in the adapter in to the device itself. The Apple Tv set, Mac Mini etc., haven't got wall wart electric power materials however, you plug them into 110/220v offer immediately. Nonetheless most other similar gadgets (Intel NUC, for instance) have wall wart supplies. Why Is that this?
Jerome: generally the cell phone is made up of a chip that handles the charging. In keeping with Chipworks' teardown, the iPad takes advantage of a Qualcomm PM8028 ability administration chip, which handles battery administration charging, voltage regulation, and various power features. So Don't fret - they don't seem to be just feeding the 5 volts from USB into your batteries!