September 3, another new ' Xiaomi Wireless Charger ' officially on the shelves, support Xiaomi 7.5W, Apple 7.5W, Samsung 10W, the use of IDT program, the key is the price as long as 69 yuan, which everyone is not calm, millet will undoubtedly provoke price war, to the industry brings no small impact.
In order to find out what the material of this product is, the next thing for everyone is the unpacking of this product.
Through the inquiry WPC official website learned, early this year July 4, Xiaomi this 69 yuan wireless charge (model WPC01ZM) has already obtained QI attestation, this provides the product compatibility and the security to provide the reliable safeguard.
One, Xiaomi Wireless charger (Universal fast-charge version) Open box Xiaomi Wireless Charger (Universal Fast charge version), Power 10W max.
Key features include: Smart compatible, metallic body, wireless fast charging. The back is the main technical parameters, product name: Xiaomi Wireless Charger (Universal fast charge version); Model WPC01ZM, input interface USB-C, input 5v2a, 9v1.6a; Output 5W Max (5V), 10W Max (9V).
Manufacturer: Jiangsu Purple Rice Electronic Technology Co., Ltd. (Millet ecological chain enterprise).
Package Contents: Wireless charger, USB-C cable, manual.
Wireless charger Product Color Black, the front panel with a skin-like coating, feel comfortable, the surface has a millet ' MI ' logo.
Product thickness is about half the diameter of a dollar coin, the volume is not thin.
The bottom has a circle of non-slip rubber pads, the main specifications are also marked. Product body using aluminum alloy body, shell using aluminum alloy molding process, She anode sandblasting, edge a lap high-gloss chamfer treatment, with the Apple notebook is the same process, mirror cover.
The side interface type is USB-C.
The side of the product has a small light indicator that is green under normal operating conditions.
The measured data can be wirelessly charged for iphone x.
For iphone x wireless charging, using the Chargerlab power-z km001c tester to test the input voltage and current and power, the supporting PC-side software can realize the monitoring record of the whole charge, the maximum input power is about 10W.
Using the wireless charging test aging fixture to test, display 5W, 7.5W, 10W pass through, that is, the product supports these power stalls.
Second, Xiaomi Wireless Charger (Universal Fast charge version) disassembly
Remove the bottom skid pad and expose 4 screws.
Remove the screws and separate the aluminum bottom housing.
PCB board area is small, coated with a thick layer of thermal silica gel. The circuit board first coated with silicone grease, and then a thick layer of silica gel, acting as a heat conduction, can be heat conduction in time to the aluminum alloy shell.
The PCB circuit board is fixed on the plastic parts by 4 screws, the plastic parts adopt two-layer structure, combine in the form of snap. Separate the two-layer structure of the plastic parts and remove the front panel and plastic compartment.
The coils and PCB boards are respectively distributed on both sides of the plastic compartment.
Welded coils.
The above translucent plastic Parts act as LEDs on the conductive circuit board to indicate the light.
PCB front, clean the surface of silica gel and silicone grease, found that the main components are distributed above.
The back of the PCB board.
Using IDT wireless charging scheme, master chip model IDT P9237.
The position of the reserved inductor may be a version with built-in inductor fixed frequency voltage regulation.
Reserved 1206 MLCC Position Air weld, do not exclude the subsequent introduction of the use of NPO or x7r capacitor version.
Screen printing N40 4 mos tube, composed of H-bridge drive coil.
8.000MHz SMD Crystal oscillator. A close-up on the back of the PCB board is welded with a CBB capacitor (394j100 0.39μf withstand voltage 100V), a temperature probe, and a USB-C female base.
Here is the CBB capacitor, not the industry's commonly used MLCC chip capacitors, the efficiency will be lower, the capacitor should have some heat, but the impact is small.
USB-C Female Close-up, model La088f24.
Family.
Three, charging head net disassembly summary Xiaomi Wireless Charger (Universal Fast charge version) uses the US IDT P9237 chip solution to provide performance assurance for 10W wireless charging.
