Samsung's 15W European standard charger is disassembled, and only Samsung can set the fast charging protocol

Recently, the charging head network got a 15W European standard charger from Samsung. After getting started, it found that this charger still uses the classic model ep-ta200, and the overall appearance design is not much different from the previously disassembled 15W charger of Samsung Guoxing. However, the usb-a port is designed on one side of the body, which is very against the popular design. The charger supports Samsung AFC fast charging protocol and can charge Samsung S10 for 15W. Next, the charging head network will be disassembled in detail to see how the internal design works.

1、 Samsung 15W charger appearance

The charger is made of pure black body, with smooth edges and corners. The front of the fuselage is printed with lightning logo and "adaptive fast charging", which is what we often call AFC adaptive fast charging protocol.

There is a Samsung logo on the top.

Charger parameter information is printed on the back

Model: ep-ta200

Input: 100-240V ~ 50 / 60Hz 0.5A

Output: 9v1.67a, 5v2a

The products have passed EAC, CE and VI energy efficiency certification.

The input is equipped with European standard pins.

The usb-a output interface is set on one side of the fuselage with black rubber core.

iPhone 12 charger


The measured length of charger body is 57.66mm by vernier caliper.

The width is 35.8mm.

The thickness is 22.49mm.

The intuitive feeling of holding it in the hand.

The net weight of the charger is about 38g.

The output protocol of usb-a port is detected by using chargerlab power-z kt002, which shows that it supports Samsung 5v2a, DCP and AFC protocols.

2、 Disassembly of Samsung 15W charger

Apple Charger Cable


The top shell of the fuselage is disassembled, and the edge is sealed by snap and ultrasonic welding.

PCB board front view, capacitors and transformers and other devices glued reinforcement, usb-a mother coat plastic shell dust, but also play a role in isolating the primary level.

At the back of PCB, the boundary between primary stages is obvious.

Through the observation and analysis of the charger circuit, it is found that Samsung 15W charger adopts the typical architecture of switching power supply wide range output and protocol chip controlling output voltage. Now we start from the input to understand the components one by one.

At the back of PCB, the boundary between primary stages is obvious.

Through the observation and analysis of the charger circuit, it is found that Samsung 15W charger adopts the typical architecture of switching power supply wide range output and protocol chip controlling output voltage. Now we start from the input to understand the components one by one.

At the input end, there are safety resistor, color ring inductor and two high voltage filter electrolytic capacitors.

iPhone 12 charger


Fuse resistor close-up, jacket heat shrinkable tube protection, 2W 2.8 Ω。 Dialog iw1790 is used as the primary control chip of PWM. This scheme does not need optocoupler or other feedback components. It is used together with its own protocol chip to communicate through transformer, so as to reduce the number of peripheral components and simplify the system design. The primary switch MOS comes from semihow semiconductor, hct70r1k6750v super junction NMOS, with a conductance of 1.6 Ω。 Semihow semiconductor is the main supplier of mass-produced Samsung chargers. In 2017, it began to cooperate with Samsung Semiconductor to develop a high-voltage superjunction process platform. At present, it basically covers common models of 600V ~ 900v high-voltage superjunction MOS, and can ensure a production capacity of 50000 pieces / month.

Semihow semiconductor superjunction MOS adopts multilayer epitaxy process, especially in fast charging and PD applications; Built in ESD diode, good antistatic ability. At the same time, it has the global excellent wafer production quality control system support, and is manufactured in the same wafer factory with apple and Qualcomm's high-end IC.

Summary of dismantling charging head net

Apple Charger Cable


Samsung's European standard charger is black with frosted surface, and its input terminal adopts typical European standard long pin design, so it is very stable to use. However, in terms of performance, the compatibility with qc2.0 has also been cancelled. It only supports its own AFC fast charging, with a maximum charging power of 15W. On the whole, the function is somewhat single. However, the users who get this charger are also Samsung mobile phone users, so it's no surprise.

It is found that this charger adopts dialog iw1790 + iw660 scheme, with high chip integration, no optocoupler and simplified PCB design. In addition, the primary switch MOS adopts semihow semiconductor hct70r1k6. The company has long cooperated with Samsung, and the chip quality has been highly recognized by Samsung. The overall workmanship and materials of the charger follow the style of Samsung's previous chargers, with reliable performance.