Ebay pe design 10 full#

The Y-capacitor filter works with the Y capacitors to filter out noise. The secondary side includes some special features for power quality. The circuit board inside a genuine iPad charger showing the components. Finally, the blue snubber capacitor absorbs current spikes when the transistor is switched off. This winding also powers the IC the IC power capacitor smooths out this power. A feedback winding on the transformer provides voltage feedback to the control IC. Finally, the output voltage is available at the USB connector to power your iPad. The output diode produces DC, and the output capacitor smooths it out.

The transformer converts this to the desired high-current 5 volts. This chopped DC is fed into the primary winding of the flyback transformer. The 4-pin control IC monitors the charger and uses the switching transistor to turn the high-voltage DC on and off 41,000 times per second. The input capacitor smooths out this power. Below this, the bridge rectifier contains four diodes which convert the AC into DC (at about 170 to 340 volts ). It passes through a fusible resistor, which acts as a safety fuse. The AC power enters through the white wires in the upper left.

Since the counterfeit charger is much simpler, it is easier to understand how it works and I'll explain it first in reference to the picture below. In addition, the high frequencies allow the charger to use a small transformer, unlike the bulky transformers used for 60 Hz AC. The principle of a switching power supply is the power is switched on and off tens of thousands of times a second, allowing it to provide the exact amount of power required with very little power wasted as heat. The switching power supply is the innovation that allows these chargers to be so compact, unlike the heavy 'wall warts' powering older consumer electronics. The circuit board of a real iPad charger (left) and a counterfeit charger (right).Д«oth the real and counterfeit chargers use similar flyback switching power supply circuits. Note the reddish insulating tape in the lower center of the Apple board, another safety feature of the genuine charger. The counterfeit board has a lot of empty space, with just a few components. The Apple board is crammed with tiny surface-mounted components in every available spot. While this doesn't affect the circuit electrically, it indicates a lack of care in construction.ДЇlipping the boards over reveals that the circuitry of the genuine Apple charger is much more complex than the counterfeit. In the counterfeit charger, some components are visibly crooked or askew. The build quality of the Apple charger is much higher. The counterfeit charger only has minimal insulation. Some components are encased in shrink tubing, there are plastic insulators between some components, and some wires have extra insulation. The upper (high-voltage) half is wrapped in yellow insulating tape. One safety difference is obvious: the Apple charger has much more insulation.

The components inside a real iPad charger (left) and a counterfeit charger (right). The Apple charger uses larger, higher-quality components (in particular the capacitors and the transformer) below you will see that these have a big effect on power quality and safety. The counterfeit charger on the right is much simpler with fewer components and much more empty space.

Ebay pe design 10 full#

The genuine charger on the left is crammed full of components, fitting as much as possible into the case. Opening up the chargers reveals big differences between them. As you will see below, there is no way it could pass safety testing. (But strangely, the counterfeit still says 'TM and В© 2010 Apple Inc.') The counterfeit charger displays a bunch of certifications (such as UL) that it doesn't actually have. Assembled in China' and the manufacturer 'Foxlink', probably for legal reasons. If you look very closely, you can spot are a few differences in the text: The counterfeit removed 'Designed by Apple in California. From the outside, the real charger (left) and counterfeit charger (right) are almost identical.

Ebay pe-design 10