Charging Head Network Disassembly Report Article 708: What
can be connected with Apple is basically profitable, such as the USB-A to Lightning cable that has been certified for a long time, such as the USB-C to Lightning cable that has been certified but has not yet been officially mass-produced, and Apple's newly released 18W USB PD charger, etc. The high-quality imitation products of these products have long been spread throughout the market.
The Apple 18W USB PD charger has been developed less than two months after it was launched. In addition to its similar appearance, it also supports Apple serial number query, which has caused great trouble for ordinary users when purchasing products.
high-imitation charger can achieve both appearance and connotation? Through the product disassembly of the charging head network, you can find the answer.
1. Charger appearance
This charger volume and appearance is made of 1:1 according to the original 18W charger of Apple. The overall body is gray and white. The product is equipped with American pins. The model in the hand is still just a factory product, and there is no parameter information on the shell.
output panel is gray, and the single USB-Ch output interface is available.
If you look carefully at the panel on the output side, you can still find some flaws. The assembly tolerance of the charger is very large, and there is a wide gap between the end cover and the main part of the body shell.
Then look at the output interface. Two metal wraps are used on both sides of the tongue inside the USB-C port, which should be used to strengthen structural strength.
Let's look at the USB-C interface of Apple's original 18W charger. The internal tongue is very neat and fine, and there is no metal wrapping on both sides.
In terms of weight, this high-quality imitation charger weighs about 43.4g, while Apple's original charger provides about 60.1g. Although the difference is about 18g, for ordinary consumers, it is difficult to distinguish the authenticity based on their weight if they do not get two chargers at the same time.
Use ChargerLAB POWER-Z KT001 to detect the PD voltage gear of the charger. It displays that it supports two sets of voltage gears: 5V/3A and 9V/2A. The maximum output power is 18W. The USB PD protocol version is PD2.0.
In addition to the USB PD fast charging protocol, this charger also supports the USB DCP charging protocol.
At the same time, the editor used ChargerLAB POWER-Z MF001 to detect and found that this charger has the unique serial number information of Apple's original charger, and the serial number displayed is: C3D8423C73YH1P9AR. High imitation chargers that support Apple's serial number detection are currently rare on the market.
2. Charger disassembly
Compared with Apple's original charger, the shell of this high-quality imitation charger is easier to open. The charger does not use a conventional USB-C interface, but is optimized for Apple's original products and adopts a structure similar to Apple's original products. At a glance of components of
PCBA module, you can see that the circuit board is very simple, and the input end omits many anti-interference components.
input end uses two metal sheets to cooperate with AC pins to get power. For cost saving purposes, there is only one fuse at the input, and there are no other protective components other than that, and the design is very simple. The electrolytic capacitor at the input end of
is brand KSJ, which is heat resistant to 105℃.
electrolytic capacitor specification is 400V 15uF.
has a solid-state capacitor next to the USB-C interface for output filtering, with a specification of 16V 820μF.
There is a Y capacitor between the primary and secondary, which eliminates the output interference signal.
We can see the structure of the USB-C interface more clearly by changing the angle. I clearly remember that the USB-C interface of Apple's original 18W charger uses a fully metal-wrapped base, while this high-quality imitation version only uses a vertical PCB board , which is much worse than the original product in terms of structural strength alone. There is a wire drawn from the transformer on both sides of the PCB board, namely the positive electrode and the negative electrode. A large section of wire is directly exposed at the welding of the positive electrode wire and the PCB board, without strengthening insulation treatment.The welding method between the
USB-C base and the PCB board is very simple, and it falls off directly under a little force, which is very poor in reliability.
At the same time, this PCB board is also relatively fragile and is easier to break.
primary switch tube, silk screen printing "CM4N60F".
comes from Dongke Semiconductor secondary synchronous rectifier chip DK5V100R25C. This is a simple and efficient synchronous rectifier chip, with only two pins A and K, corresponding to Schottky diode PN pins respectively. The chip integrates a 100V power NMOS tube, which can greatly reduce diode conduction loss, improve the efficiency of the whole machine, and replace or replace the Schottky rectifier diode currently on the market.
DK5V100R25C detailed information.
PCB board back patch components list.
input terminal rectifier bridge, silk screen printing "ABS210".
Primary master control PWM chip, from MPS, model HFC0500.
MPS HFC0500 detailed specifications.
There is an EL optical end coupler between the primary and secondary, which is used to feedback and adjust the output voltage.
There is a protocol chip and an output MOS switch tube on the back of the PCB board where the USB-C interface is soldered. USB PD protocol chip is used for Fintek F75192.
F75192 is a USB Type-C controller that complies with the latest USB Type-C and PD standards, which provides connection and polarity detection for configuration channels (CC). With the integrated circuit setup, the F75192 provides a platform that can easily support any Type-C port type. It also integrates the physical layer of the USB BMC power transmission protocol, which can provide output voltages of 5V to 20V, and can achieve power up to 100W. Provides the best choice for adapter adapters, car chargers, mobile power supplies and other applications.
Fintek F75192 detailed information. All the chargers of
have been disassembled.
charging head network disassembly summary
appearance, this high-quality imitation Apple 18W USB PD charger is highly similar to Apple's original products, and the voltage output gear is also consistent with Apple's original 18W. More importantly, this charger also supports Apple serial number detection. Therefore, for ordinary users, it is difficult to distinguish the authenticity.
through the charging head network solution found that the manufacturer extremely compressed the BOM cost, making the product workmanship very rough, the PCBA design is very simple, and many components are omitted on the primary side, which poses certain safety hazards. However, the secondary side protocol chip uses F75192 from Fintek Jingtuo Technology, and the support for Apple's serial number query is also implemented by this chip.
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