Introduction

UGREEN has launched a Qi2 magnetic wireless charger that supports 15W wireless fast charging for iPhones. It comes with an integrated USB-C braided cable. Its case is made of aluminum alloy to improve heat dissipation. ChargerLAB also got one. Next, let's take it apart to see its internal components and structure.

Product Appearance

The front of the box is printed with UGREEN, product appearance, Qi2, 15W, and other selling points.

Some specs info are printed on the back, we'll take about later.

The box contains the UGREEN 15W Qi2 wireless charger and some documents.

The UGREEN 15W Qi2 wireless charger comes with an integrated USB-C cable.

The case of the USB-C connector is made of metal, sprayed with silver metallic paint, and has UGREEN printed on the front.

The braided cable is silvery white and has good workmanship.

There is a product information label on the cable. Model is W703. It can support input of 5V3A or 9V2.22A. The maximum output power is 15W.

The back of the label has the Qi2 logo, indicating that it supports the latest Qi2 wireless charging standard and can achieve 15W magnetic wireless charging for iPhone 12-15.

The back of the charging panel is made of aluminum alloy. The center is laser engraved with UGREEN.

The back of the charging panel has a raised design.

The front surface is covered with silicone, which feels good to the touch. The Qi2 logo is printed in the center.

The length of the USB-C cable is about 156 cm (61.42 inches).

The diameter of the wireless charging panel is about 60 mm (2.36 inches).

The thickness is about 11 mm (0.43 inches).

The weight is about 108 g (3.81 oz).

Teardown

Next, let's start to take it apart and take a look at the internal components.

First, pry off the front cover of the wireless charger. There are wireless charging coils and magnets for holding phones inside.

The wireless charging module and the aluminum alloy case are fixed with tape.

The braided cable is fixed in the case by screws.

Remove the fixing screws and separate the wireless charging module and the aluminum alloy case.

The cable is equipped with a copper ring to tighten it to prevent it from loosening.

The wires are connected to the wireless charging module by soldering, and the soldering points are insulated with glue.

Separate the wires and wireless charging module.

There is a shielding net and tin foil inside the cable for shielding.

The interior of the aluminum alloy case adopts a groove design corresponding to the wireless charging module and cable.

There is a metal shielding case on the back of the wireless charging module.

The metal case is fixed by spot welding.

Remove the metal case and find a circular PCBA module inside the case.

The metal case is made by stamping process.

Here is the PCBA module.

A bump on the case fixes the PCBA module.

The wireless charging coil is soldered to the PCBA module.

There is a layer of conductive fabric between the PCBA module and the case.

Remove the PCBA module.

The diameter of the PCBA module is about 43.4 mm (1.71 inches).

The thickness is about 2.6 mm (0.1 inches).

The wireless charging master control chip, secure authenticator, alloy inductor, MOSFETs, and MLCC capacitors are on the front of the PCBA module.

A large area of copper is exposed on the back of the PCBA module to enhance heat dissipation.

The wireless charging master control chip is from NuVolta. It integrates a buck and boost controller, four pairs of half-bridge drivers, a built-in 32-bit MCU core, 64K MTP, and 4K SRAM. It has integrated protection functions and supports Qi2 wireless charging. Model is NU1718.

The crystal oscillator is used for the wireless charging master control chip. 41.039MHz.

The secure authenticator is from FUDAN. It supports multiple security algorithms and has multiple protection capabilities. Model is FM1230.

The Dual Op Amp for signal demodulation is from Gainsil. Model is GS358.

There is an NTC thermistor below the alloy inductor to detect the temperature of the wireless charger. 4.7μH.

The MOSFET used for the synchronous boost is from VGSEMI and adopts PDFN3333 package. Model is VS3622DE. 30V 10mΩ.

Here is the information about VGSEMI VS3622DE.

These are the resistor and the MLCC capacitors.

These two MOSFETs for wireless charging are from VGSEMI. Model is VS3622DE.

The MOSFET used for resonant capacitor switching is from AGM-Semi and adopts PDFN3.3*3.3 package. Model is AGM614MBP. 60V 13mΩ.

These are six NPO resonant capacitors.

NuVolta is printed on the edge of the PCB.

Well, those are all components of the UGREEN 15W Qi2 Wireless Charger.

Summary of ChargerLAB

Here is the component list of the UGREEN 15W Qi2 Wireless Charger for your convenience.

It uses an aluminum alloy case to improve heat dissipation. The charging panel is made of silicone to avoid wear and tear on the phone during use. It comes with an integrated USB-C braided cable, which is about 156 cm (61.42 inches). 

After taking it apart, we found it adopts a wireless charging master control chip from NuVolta. It is also equipped with a thermistor to detect the temperature, improving consumers' charging experience. The interior is compact and equipped with comprehensive safety measures. And the overall workmanship is pretty good.

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