Preface
Belkin has launched a Qi2 folding wireless charger, which is folded for easy daily carrying and storage, and can also be unfolded on a desk, and the phone is fixed by the built-in magnet, which can be used as a phone holder and wireless charging at the same time. This foldable charger supports Qi2 magnetic wireless charging with an output power of 15W.
The wireless charging stand supports 0-70 degree angle adjustment, supports vertical screen chat and horizontal screen drama, and also supports StandBy mode, and the mobile phone is incarnated as an electronic clock. Wireless charging can also be charged when folded, and it can charge earphones that support wireless charging. The following charging head network will disassemble Belkin's folding wireless charger and take a look at the internal design and materials.
Belkin 15W foldable wireless charger unboxing
The box has a simple design of green and white half color, in addition to the magnetic charging icon of the regular charger, the most important thing is that it has the word "Qi2", which supports iPhone 15W wireless charging.
The back of the box has a diagram of the charger closing and unfolding status, as well as featured bullet points and multilingual instructions.
When you open the package, in addition to the Belkin Qi2 Folding Wireless Charging Dock, you also have a charging cable, manual, warranty cardboard, etc.
The package comes with a C-to-C type charging cable with rounded edges and a Belkin brand logo.
At the same time, the cable has an anti-interference shielding magnetic ring design.
The measured cable length is about 150.5cm, which can meet the length requirements when used in desktop connection.
The POWER-Z KM003C tester reads the wire E-marker chip, but the measured E-marker chip does not show any information or does not have the chip.
The Belkin Qi2 folding wireless charger is a folding design of the base + magnetic area panel, which is small in size and can be put into the pocket at will when the lid is closed.
The front of the base is stamped with the Belkin branding.
The rear is equipped with a single USB-C power supply port.
There are sunken areas on both sides, and similar to the design of laptops, the bracket is easier to open under force.
In the unfolded state, the Belkin Qi2 Foldable Wireless Charger looks and feels similar to a regular bracket-type magnetic charger.
In addition, the base part of the charging dock has a special bracket storage slot, and the inside is still made of silicone skin-like material, which feels delicate.
The magnetic area has an off-white magnetic charging coil logo, similar to the MagSafe charging logo.
The bottom of the charging dock is equipped with a large area of non-slip mat and is printed with relevant parameter inscriptions.
Close-up of product parameters
Model: WIA008
输入：9V2.22A（Max）
Wireless Output: 14V/15W(Max)
The products have passed CE, KC, UKCA certification, as well as Qi2 wireless charging certification.
The body length of this wireless charger is measured to be 85.09mm.
The width is 64.99mm.
The thickness in the folded state is 22.24 mm.
The size of the product in the hand is intuitively felt.
In addition, the net weight of the product was measured to be about 195g.
Belkin 15W foldable wireless charger teardown
After reading the unboxing and display of the Belkin folding wireless charger, let's disassemble it and take a look at the internal design and materials.
First of all, remove the non-slip pad of the wireless charging base, and set the screws on the base.
Unscrew the four set screws on the base and remove the back cover, which is secured by glue and screws.
Unscrew the set screws of the shaft and the counterweights on both sides.
Remove the connector board on the base and connect to the wireless charging module through the wire.
The wires are soldered to the interface board.
The USB-C receptacle is secured by via soldering.
The rotating shaft fixing iron is fixed by screws.
Disassemble and remove the hinge and fixing bracket.
A metal hinge on the other side provides damping.
Remove the wireless charger cover and fix the bracket hinge with screws.
The wireless charging module is fixed with double-sided tape.
Remove the set screws and take out the bracket hinge.
The back of the wireless charging module is equipped with a metal shielding shell and double-sided tape.
The wireless charging coil is wound with litz wire.
Using a vernier caliper, the diameter of the wireless charging module is about 56mm.
The thickness of the wireless charging module is about 7.22mm.
The module weighs about 43g.
The shell is disassembled, and inside the shell is a round PCBA module.
Soldering disconnects the coil from the PCBA module and the PCBA module, and the PCBA module and the housing are fixed by conductive cloth pasting.
The front of the round PCBA module is at a glance, the left side is the input wire pad, the wireless charging master control is welded in the middle position, the encryption chip, the alloy inductor is welded above, the boost MOS tube, the wireless charging MOS tube and the resonant capacitor.
A large area of exposed copper is grounded on the back of the PCBA module to enhance heat dissipation performance.
The wireless charging master is from Volta Semiconductor, model NU1718, which is a high-efficiency and highly integrated wireless charging transmitter controller, with a step-up/buck controller inside the chip, a four-to-half bridge driver integrated inside the chip, a built-in 32-bit MCU core, and integrated 64K MTP and 4K SRAM.
Volta Semiconductor NU1718 supports QC and PD fast charging and power taking functions, built-in 5V/3.3V1.8V LDO, integrated high-precision current detection, built-in 13-channel 14-bit ADC, integrated comprehensive protection functions on the chip, and has I2C master-slave interface and UART interface, supporting Qi2 wireless charging applications.
The 41.039MHz passive crystal oscillator is used to provide a clock for the wireless charging master control chip.
The built-in security chip of the wireless charging module comes from Shanghai Fudan Microelectronics, model FM1230, supports DES/TDES, AES, SM4 symmetric algorithms, RSA, ECC, SM2 asymmetric algorithms and SHA1, SHA224, SHA256, SM3 hash algorithms and other security algorithms, with a variety of protection capabilities, supports symmetric and asymmetric encryption and decryption operations, secure storage, identity authentication and other functions, and can be used for contact ESAM/ PSAM module, SE security module and other application fields.
同步升压MOS管来自芯控源，型号AGM311MAP，双NMOS，耐压30V，导阻10.5mΩ，采用PDFN3.3*3.3封装。
Close-up of 4.7μH alloy boost inductor.
Close-up of wireless charging power tube and resonant capacitor.
两颗无线充电功率管采用芯控源AGM311MAP。
The MOS transistor used for resonant capacitor switching adopts a core-controlled source AGM614MBP, dual NMOS, withstand voltage of 60V, conduction resistance of 13mΩ, and adopts PDFN3.3*3.3 package.
One op amp is from Gainsil Polyxun, model GS2261, which is a single op amp in a SOT23-5 package.
一颗丝印3C2C的芯片特写。
Single Voltage Comparator Silk Screen V331.
The dual op amps are from 3PEAK, model LMV358B, rail-to-rail I/O/O, with a high output current capability of 100mA, and are available in an MSOP-8 package.
A single op release silk screen printing 321LV.
NTC thermistors are used to detect the temperature of the wireless charging module.
The bracket hinge housing is fixed by a hinge.
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 Belkin 15W wireless charger is attached for your convenience.
The Belkin 15W foldable wireless charger supports Qi2 wireless charging, and the built-in magnet is used to attach the fixed phone for precise alignment. Magnetic attachment can also be used as a phone holder, which supports horizontal and vertical placement of the phone, and supports StandBy mode. The wireless charger supports 15W wireless charging for Apple phones, and can also charge the TWS earphone charging case that supports wireless charging. The wireless charger is powered by the USB-C interface and comes with a 1.5-meter charging cable to meet the needs of desktop use.
Through the dismantling of the charging head network, it was learned that the Belkin 15W wireless charger is equipped with a PCB board inside the base, soldering the USB-C female connector, and the wire is soldered to the wireless charging module. The wireless charging chip uses Volta Semiconductor NU1718, with Fudan Micro FM1230 encryption chip, and the MOS comes from the core control source. The wireless charging module is equipped with a thermistor to detect the internal temperature of the module, and the temperature is controlled by the main control chip to improve the wireless charging experience.