preface
Recently, the charging head network got the third product of the new Qi2 series wireless charger of the well-known 3C accessories brand Greenlink - the three-in-one wireless charger W705. This 3-in-1 wireless charger combines wireless charging for iPhone, Apple Watch, and AirPods, so you can charge all three devices at the same time.
At the same time, the product package comes with a 30W fast charging charger set, which can not only power the wireless charger, but also plug in the cable to quickly charge the iPhone for 20W or 27W fast charging. At the same time, the product has also passed Apple's MFW and WPC's latest Qi2 certification, and its performance and quality are quite reliable, which can bring a good charging experience to Apple users. The following charging head network will disassemble this new product to see the actual workmanship materials.
Greenlink 25W 3-in-1 wireless charger unboxing
The front of the box is printed with the UGREEN brand, product appearance drawing, name, MFW, Qi2 double certification logo and two major selling points.
The back is printed with product parameters, a list of compatible devices, and business information.
Close-up of product parameters, let's introduce it to the physical display link.
The package contains a 3-in-1 wireless charger, a charger set, a white adhesive sticker, an instruction manual and a warranty card.
The attached white adhesive sticker is used to attach it to the place where the watch is placed, which plays a role in stabilizing and protecting the watch, and the details are taken into account.
The included charger is a classic straight plate shape, the body is made of PC fireproof material white shell, the waist is glossy and glossy, and the front is printed with the UGREEN brand.
Close-up of charger parameters
Model: CD127
输入：100-240V~50/60Hz 0.8A Max
输出:5V3A、9V3A、12V2.5A、15V2A、20V1.5A
输出总功率:30W Max
Manufacturer: Shenzhen Greenlink Technology Co., Ltd
The charger is CCC certified.
测得充电器支持FCP、SCP、AFC、QC3.0/4+、SFCP、PD3.0、PPS、DCP、SAM 2A、Apple 2.4A充电协议。
PDO报文显示USB-C口还具备5V3A、9V3A、12V2.5A、15V2A、20V1.5A五组固定电压档位,以及3.3-11V3A一组PPS电压档位。
The USB-C cable is about 102cm long, and the length of 1 meter is 1 meter, which can be used on the desktop in places such as home office.
The new 3-in-1 wireless charger of Greenlink continues the design language of the previously disassembled Greenlink MFM certified 3-in-1 multi-functional wireless charger, with a white shell and a metal frame and metal rod, which makes the whole look very classy.
The rear of the base is equipped with a USB-C charging port and a trip button for the wireless charging module of the watch.
The USB-C interface is in line with the current mainstream and can be adapted to more power supplies on the market without picking a charger.
Close-up of the trip button.
Press the trip button to take out the wireless charging module of the watch, and the retractable design can be folded to protect when idle, and it also looks neater.
底座一侧边框上镭雕有DESIGNED BY UGREEN字样。
There is an LED charging indicator in the middle of the front end.
Under normal power-on use, the indicator light will light green.
The top area of the base is also printed with the UGREEN brand.
The front center of the mobile phone wireless charging module is printed with the Qi2 logo.
The mobile phone wireless charging module can be rotated, which is convenient for users to adjust the angle, and the use experience is better while charging.
There are non-slip mats at the bottom four corners, and the product nameplate is printed in the center area.
Close-up of product parameters
Model: W705
输入:5V3A、9V3A、12V2.5A
输出总功率：25W Max（iPhone：15W，Apple Watch/AirPods：5W）
Manufacturer: Shenzhen Greenlink Technology Co., Ltd
The product is Qi2 certified.
The measured length of the base is about 171.51mm.
The width is 89.35mm.
The thickness is 16.41mm.
The size of the product in the hand is intuitively felt.
In addition, the measured product weighs about 472g.
Among them, the Apple iPhone is charged separately, and the successful pop-up window charging animation shows that the charger input power is about 20.78W.
Charging the iPhone and AirPods at the same time, the measured charger output power is about 22.72W.
同时给iPhone、Apple Watch、AirPods充电，测得充电器输出功率约为25.5W。
A list of actual usage scenarios of Apple's family bucket.
Greenlink 25W 3-in-1 wireless charger dismantling
There are hidden screws at the bottom four ends of the anti-slip pad.
The bottom shell of the base is opened by removing the screws, and the metal frame is actually exposed as a one-piece metal plate inside.
The internal PCB board is fixed with screws for the wireless charging function of the earphones, and at the same time connects the watch to the wireless charging module of the mobile phone for power supply.
The wireless charging coil of the earphone and the power supply wire of the wireless charging module of the mobile phone are glued for protection, and the inductor, capacitor and other devices are glued for black glue.
The wireless charging path of the watch is welded with an independent small plate, glued and covered with a shield, and a sponge is pasted at the same time.
Separate the PCB board and take it out.
The front of the small board is equipped with a headset wireless charging main control chip, a two-way step-down circuit step-down controller and a watch wireless charging circuit board, and the inductor, capacitor and other devices are glued and reinforced.
The other side of the board is at a glance, corresponding to the capacitance and the small board area of the watch's wireless charging path, the core heating device is through the hole and exposed copper and tin to help heat dissipation, and the area is covered with tape insulation protection. The USB-C receptacle is plastered with conductive cloth.
Close-up of the USB-C input receptacle.
Input filter inductor, silk screen 301.
Close-up of solid-state filter capacitors, specifying 220μF 16V.
The wireless charging main control comes from Jinxin Micro, the model is CV90331, which is a highly integrated wireless charging SOC transmitter chip. Support fast charging and power taking function, support PD2.0, PD3.0 and QC2.0, QC3.0 and private fast charging and power taking, support three-coil wireless charging applications. CV90331 supports WPC Qi 1.2.4 standard and supports 5-15W wireless charging transmitter.
CV90331 built-in power full-bridge driver, built-in current sampling amplification, digital decoding module and foreign object detection, built-in multi-channel ADC, provide reliable overvoltage, overtemperature and output overcurrent protection, and streamlined peripheral components.
CV90331 wireless charging main control is equipped with a 12.000MHz passive crystal oscillator to provide the clock.
The wireless charging switch uses Astatine Semiconductor AD30K15D3 dual NMOS transistors to form a full bridge, and the internal MOS transistor conduction resistance is 11.5mΩ and 9mΩ respectively, and the DFN3030 package is used.
Close-up of headphone wireless charging NPO resonant capacitor.
Close-up of the wireless charging coil of the earphone, tightly wound.
The step-down IC for wireless charging of mobile phones, IAIC Wise Analogy IA24835, is a fully integrated, high-efficiency 3.5A synchronous rectification buck converter in an ESOP8 package.
Close-up of the buck inductor paired with the IA24835.
Remove the wireless charging module module of the mobile phone.
Backside shield shell spot welded package.
The metal shielding enclosure is disassembled to reveal the PCBA module inside.
Through observation, it is found that the module is a mass-produced Qi2 certified wireless charging module based on Volta Semiconductor's NU1718 solution, which can help customers quickly design products and put them into production, which is very convenient. Previously, the charging head network has introduced the module in detail when dismantling the 25W Qi2 2-in-1 magnetic wireless charger of Greenlink.
Close-up of the wireless charging coil on the front of the module.
The buck chip used for wireless charging of watches is also IA24835 using sensible analogies.
The same inductance is used for it.
The small black board is soldered on one side with custom chips, power chokes, and filter capacitors.
The MCU and half-bridge driver are soldered on the other side.
A silk-screened 338S00810-A0 custom chip for wireless charging power stage voltage regulation.
Close-up of the chip inductor used together.
The buck controller STM32L433RC from STMicroelectronics is an ultra-low-power microcontroller with an 80MHz ARM M4 processor, 256KB of memory, USB connectivity, and LCD screen drivers.
On both sides of the MCU are TI Texas Instruments' half-bridge drivers, model number TPS51604, supporting 28V supply voltage, using a 2*2mm, 8-pin WSON thermal package.
Close-up of another Texas Instruments TPS51604.
Turn on the wireless charging module of the watch, and only the wireless charging coil is designed inside.
A list of all dismantling and a family photo.
Summary of the dismantling of the charging head network
Finally, a list of core components of the Greenlink 3-in-1 wireless charger is attached for your convenience.
Greenlink three-in-one wireless charger W705 is another Qi2 certified wireless charging product launched after the magnetic wireless charger W703 and two-in-one magnetic wireless charger W702, which fills a major important plate of Greenlink Qi certified wireless charging products in one charge and multiple directions, and its configuration of iPhone, Apple Watch, AirPods wireless charging function can meet the simultaneous wireless charging of Apple's whole family bucket, and the dual certification blessing ensures the charging power, with a total power of up to 25W. The product design is concise and neat, and the overall design is very classy.
Through the dismantling of the charging head network, it was learned that the green three-in-one wireless charger is equipped with a PCBA module inside the base, which is equipped with a wireless charging path for the earphone and a wireless charging circuit for the step-down output to supply power to the wireless charging module of the mobile phone and the wireless charging circuit of the earphone, in addition to the wireless charging path of the watch.
Among them, the wireless charging of the earphones adopts the main control of the Jinxin Micro CV90331, and the wireless charging path of the watch adopts the same scheme as the original Apple watch wireless charger, and the devices come from Texas Instruments, STMicroelectronics and other major manufacturers. The mobile phone wireless charging module adopts the Qi2 certified wireless charging module designed and mass-produced based on the NU1718 wireless charging chip of Volta Semiconductor, with Fudan Micro FM1230 encryption chip and the wireless charging power tube using Weizhao VS3622DP, and is equipped with a thermistor to detect the internal temperature and control the temperature to improve the charging experience of consumers. The product is quite good from the appearance design to the performance and the internal workmanship.