Circuits in apple’s iphone charger are ‘surprisingly complex andinnovative’ – Pipe Inspection Camera Manufacturer

A closer look at the wall charger that Apple ships with its iPhonehas found that the hardware includes better and safer componentsthan typical chargers. An exhaustive analysis of the iPhone charger was conducted by Ken Shirriff ( via Gizmodo ), revealing that Apple utilizes a “surprisingly complex andinnovative” circuit to convert AC input between 100 and 240 voltsto 5 watts of smooth 5 volt power. “”Apple’s power adapter is clearly a high-quality power supplydesigned to produce carefully filtered power,” he wrote. “Apple hasobviously gone to extra effort to reduce EMI interference, probablyto keep the charger from interfering with the touchscreen. Vehicle Black Box Car Camera

“When I opened the charger up, I expected to find a standarddesign, but I’ve compared the charger to the Samsung charger andseveral other high-quality industry designs, and Apple goes beyondthese designs in several ways.” One of Apple’s main concerns with the design of its charger issafety. Shirriff found that Apple employs “super-strong AC prongs,”as well as a “complex over-temperature / over-voltage shutdowncircuit.” In particular, the strong charger prongs were likely prompted by arecall Apple initiated in 2008 for iPhone 3G USB power adapters. The recall began after Applefound that “certain conditions” could cause the prongs to snap offwhen the adapter is pulled from a wall outlet, potentially creatinga shock for those who might touch an exposed connection. Shirriff found that Apple’s new and improve prongs are considerablymore difficult to remove than counterfeit devices and evenSamsung’s chargers. Apple’s prongs refused to budge even when theywere pulled using pliers. Pipe Inspection Camera Manufacturer

“They have large metal flanges embedded in the plastic of the case,so there’s no way a prong can come loose short of the destructionof the charter,” he said, adding: “I’m impressed with the effortApple put into making the charger more safe after the recall.” The teardown also found that Apple’s charging circuits pack animpressive amount of complexity into a size smaller than one inch.In all, the charger crams most of the components into a printedcircuit board that is about the size of a quarter. Even with superior components and greater safety, Shirriffspeculated that Apple’s charger is still sold for “almost allprofit.” Apple’s higher-quality parts probably cost the companyabout a dollar extra, but the charger sells for about $20 more thansimilar competing options. China Hidden Camera Detector

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