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The wireless charging market has become irremediable since the explosion of the iPhone X, but today we are talking about another big brand that promotes wireless charging: Samsung.

The iPhone only supports wireless charging this year and 2017, but also fast charging in 2017. Samsung has already made wireless charging layout for mobile phones during NOTE2 five years ago. Users can enjoy wireless charging by replacing the rear case with wireless accessories. Later, note5, S6, Note7 and S7 series can be used for wireless charging. Mobile phone manufacturers such as S8, note8 all have wireless charging functions. Samsung is the first large mobile terminal enterprise to promote its development in the wireless charging market.

As a wireless charger for mobile phone wireless charging equipment, Samsung is also committed to promoting the development of wireless chargers. Compared with the current 5W charging on the iPhone, Samsung has long used fast charging technology in wireless charging. After connecting with Samsung's own 9V fast charging charger, the wireless charger can reach a maximum 15W input power.

Samsung's wireless charger has now developed to the fourth generation. Today, we bring you the EP-PG950 demolition test of Samsung foldable wireless fast charger.

On the left is a brand of wireless charger board with a thickness of 7.4mm. Most of the wireless chargers on the market are light and thin. On the right is the main character of this article, Samsung wireless fast charging charger. Samsung is a three-layer cheeseburger with a thickness of 29.5mm. Why does Samsung become thicker and thicker when everyone is pursuing lightness?

That is because the wireless charger is very hot, light and thin can not control the calorific value can only do low power, and Samsung choose such a large volume of heat dissipation is not a problem, so Samsung can achieve high-power wireless fast charging.

Conversely, we can see that he used the USB-C input interface. Samsung kindly presented a microUSB-to-USB-C adapter to users without worrying about its use. In the product can be seen around a circle of open-hole heat dissipation grille, to ensure that high-power wireless fast charging rapid convective heat dissipation cooling.

The whole plane of the base is a rubber anti-skid pad to avoid any shaking when the product is placed. The parameters of the middle nameplate are as follows: EP-PG950, input voltage: 5.0V2.0A/9.0V1.67A, manufacturer: Samsung Electronics Co., Ltd. and Vietnam. The right side also has "Qi" wireless charging protocol LOGO.

Disassembly:

What exactly does a wireless charger look like? Xiaobian can't wait to start. After tearing off the bottom anti-skid rubber pad, you can see eight cross screws.

After removing the cross screw, the chassis is still clamped tightly, and the chassis is separated slowly along the edge.

Chassis details, EP-PG950 PC material.

The translucent white is the LED indicator light guide glue.

After removing the bottom shell, you can see the PCB structure, and a row of wires leads out the indicator lamp.

PCB overlook.

IDT IDTP9236 Wireless Charging Transmitter IC.

The output MOS transistors of group 3 + 1 correspond to three coils at different positions, one of which cooperates with the other three groups to act as H-bridge driver.

909017, suspected Hall element, determines the position of the upper cover by detecting its magnetism and switching different coils for maximum power charging.

Multicolor LED soft wire is connected with pcb. Insulating adhesive paper is attached to the wire to avoid loosening.

The coil launching component is also connected to the main PCB through a flexible arrangement of wires.

Prying up two lines for further disassembly, the wireless charging coil connector is very fine, the kind used on mobile phones, multiple contacts in parallel to reduce resistance.

After separating the wiring interface, the main PCB is removed.

ABOV 8216 MCU is responsible for other functions which are not supported by charging master control such as lamp control.

Ultra-thin integrated alloy inductor.

It looks like a switching buck plus linear voltage regulation.

Fully shielded USB-C base with wide fixed ears on both sides of the package makes plug-and-pull very resistant to torsion and maneuverability.

The USB-C base comes from JNTC, Korea. It can be seen from the shell that many spot welding and internal welding are very strong.

Then turn to the panel part and separate the cortical support cover.

The bottom of the cortical cover is provided with a thin sponge, which makes the panel feel flexible and elastic, and plays a supporting role in allowing air to circulate in a position to avoid panel heating.

Finally, it's the turn of the coil part. The coil is wrapped by an inner shell. There are many ventilation holes in the middle of the transparent rubber plate. The cold air flows through the coil to cool down after being inhaled by these ventilation holes.

Unscrew 4 screws to remove coil cover.

Finally exposed three coils, the super-large range can be placed horizontally, vertically and horizontally, summed up as a sentence, how to put can be charged.

Further disassembly, need to take out the coil module, you can see the bottom of the active cooling fan.

Sliding and folding structural parts are composed of steel hinge and slide rail.

Hoop details.

The coil module is connected with the main PCB through wiring arrangement.

Top view of bottom of coil module.

A 5005 centrifugal fan is used with a power of 5V/0.14A/0.7W.

The outlet of the centrifugal fan has made a number of air guide grooves, so that hot air can be discharged out of the shell without accumulation.

Coil solder joints are very full and glossy with high wettability.

The separating fan can see the air inlet at the bottom of the coil. The cold air enters through the transparent hole on the cover plate, and then flows between the coils to take away the heat. Finally, the heat is discharged from the shell through the centrifugal fan.

All disassembled at a glance.

Samsung mobile phones can activate wireless fast charging, and the input power of the transmitter at 15W can really help, but not Samsung mobile phones, other brands such as ping.