Dismantling Report: China Mobile Ultra-Thin Fast Wireless Charger

In August this year, China Mobile independent research and development, independent brand 5G mobile phone “pioneer X1” officially released. The rear three-camera, using an optical under-screen fingerprint sensor, supports QC3.0 18W fast charging and 10W wireless charging. To this end, China Mobile has launched three supporting wireless chargers to cope with different use scenarios, including: China Mobile Ultra-Thin Fast Wireless Charger, China Mobile Vertical Fast Wireless Charger, China Mobile Wireless Charging Smart Car Stand.

Next to bring you is, where the horizontal model corresponds to China Mobile ultra-thin fast wireless charger out of the box disassembly.

First, China Mobile ultra-thin fast wireless charger out of the box

拆解报告:中国移动超薄快速无线充电器

The product uses a white carton, the front is printed with the outline of the product, very simple.

拆解报告:中国移动超薄快速无线充电器

The front is printed with the product name: China Mobile ultra-thin fast wireless charger. And the product is compatible with 10W / 7.5W / 5W.

拆解报告:中国移动超薄快速无线充电器

The back of the package is a detailed specification.

Entered: 5V2A, 9V1.67A

Output: 10W (MAX)

Recharge: QC2.0 / QC3.0 adapter

Charging conversion rate: s72%

Material: ABS

Color: black/white

Size: 101 x 101 x 6.3mm

拆解报告:中国移动超薄快速无线充电器

Side for product characteristics: perfect compatibility, overcurrent protection, overpressure protection, foreign object detection, overtemperature protection.

拆解报告:中国移动超薄快速无线充电器

Open the package.

拆解报告:中国移动超薄快速无线充电器

Packing content: wireless charger, data cable, instruction manual.

拆解报告:中国移动超薄快速无线充电器

The cable interface type is Micro USB.

拆解报告:中国移动超薄快速无线充电器

The wireless charger body is designed in a minimalist design with a striking center featured China Mobile China Mobile’s signature Logo.

拆解报告:中国移动超薄快速无线充电器

There is a Micro USB input on the side.

拆解报告:中国移动超薄快速无线充电器

There is a non-slip foot in each of the bottom four corners.

拆解报告:中国移动超薄快速无线充电器

The main specification parameters are printed in the middle of the product.

拆解报告:中国移动超薄快速无线充电器

The body is slim, only 7mm thick, and small and portable.

拆解报告:中国移动超薄快速无线充电器

There is a ring of soft breathing lights around to indicate the working state.

拆解报告:中国移动超薄快速无线充电器

When the QC charger is powered on as a power adapter, the phone can be charged wirelessly. Officially, the product supports the regular 5W, Apple 7.5W (iOS 13 below) and Android 10W wireless charging mode.

Second, China Mobile ultra-thin fast wireless charger dismantling

拆解报告:中国移动超薄快速无线充电器

Unscrew the screw from the bottom footpad and turn on the wireless charge.

拆解报告:中国移动超薄快速无线充电器

The back of the cover is a double-sided adhesive that is attached to the coil.

拆解报告:中国移动超薄快速无线充电器

The circuit board is ring, the inside is the wireless charging coil, the center of the coil is the thermistor, detecting the temperature rise during the wireless charging process.

拆解报告:中国移动超薄快速无线充电器

Remove the circuit board and coil, the magnetic sheet is firmly fixed to the aluminum alloy housing, easy to dissipate heat.

拆解报告:中国移动超薄快速无线充电器

On the front of the board, only the main chip and drive tube have resonant capacitors.

拆解报告:中国移动超薄快速无线充电器

There are no components on the back of the board, and the location of the resonant capacitor is hollowed out to place the capacitor and reduce the thickness.

拆解报告:中国移动超薄快速无线充电器

Enter the Micro-USB master seat sink board weld, with two current sampling resistors at the input.

拆解报告:中国移动超薄快速无线充电器

Wireless charging resonant CBB capacitor, reserved for 1206 package NPO capacitor position.

拆解报告:中国移动超薄快速无线充电器

The 7533 regulator tube reduces the input voltage to 3.3V to supply power to the main control IC.

拆解报告:中国移动超薄快速无线充电器

The Core IP6808 is a wireless charging transmitter SoC control chip, compatible with the latest WPC Qi v1.2.4 standard, supports A11 coil, support s5W, Apple 7.5W, Samsung 10W charging. Ip6808 detects the wireless receiver through analog pings and establishes communication with the receiving end to start power transmission. THE IP6808 DECODES THE COMMUNICATION PACKETS SENT FROM THE RECEIVER AND THEN USES THE PID ALGORITHM TO CHANGE THE OSCILLATION FREQUENCY TO ADJUST THE OUTPUT POWER ON THE COIL. The IP6808 terminates the power transfer once the battery on the receiver is fully charged.

In addition, the in-chip integrated full-bridge drive circuit and voltage and current two ASK communication demodulation module, high integration, reduce the size of the scheme and BOM costs. Applicationproducts include: back clips, wireless charging base, on-board wireless charging equipment.

拆解报告:中国移动超薄快速无线充电器

IP6808 Details.

拆解报告:中国移动超薄快速无线充电器

Silkscreen H21 LM321 single-shipment.

拆解报告:中国移动超薄快速无线充电器

The wireless charging power tube comes from the Crystal Electronics SSC8428 NMOS, SOT23 package.

拆解报告:中国移动超薄快速无线充电器

Crystal Electronics SSC8428 Details.

拆解报告:中国移动超薄快速无线充电器

Close-up of thether.

拆解报告:中国移动超薄快速无线充电器

All disassembled at a glance.

Third, charging head net dismantling summary

China Mobile ultra-thin fast wireless charger cleverly designed, With the market has been popular QC3.0 charger, can support the mobile phone wireless fast charging, its built-in British core IP6808 wireless charging transmitter SOC chip, greatly reducing the number of components, the past single-chip machine plus transport and drive IC, now only need a chip to complete all functions, save materials and production costs, make the product more competitive, Become the best solution.

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