Introduction
Recently, Xiaomi launched the Xiaomi 17 series, along with a range of accessories, including a 2-in-1 magnetic wireless charger, a car wireless charger, an ultra-thin magnetic power bank, magnetic protective cases, and retro-style cases. In this article, we will focus on the teardown of Xiaomi's new car magnetic wireless charger.
This product offers 30W wireless charging for the Xiaomi 17 series and other compatible devices, and up to 7.5W for Apple devices. It integrates 15 high-performance neodymium magnets and 1 positioning magnet. The charger features a new universal ball joint for 360° adjustable viewing angles. Let’s take a closer look at its design and components.
Product Appearance
The front of the packaging features the Xiaomi logo, the product name, and an image of the product.
The back of the packaging displays the specifications.
The package includes the car magnetic wireless charger, a cable, and some documentation.
The included cable is a 3A USB-C to USB-C cable with a braided design.
The length of the cable is about 102 cm (40.16 inches).
The casing is made of flame-retardant PC material.
The front of the magnetic charging panel is covered with silicone.
The wireless charging area features a circular, with the Xiaomi logo at the center.
The entire surface is coated with a silver-gray metallic paint, enhancing the premium feel.
The back of the panel displays the specifications.
Model: MDY-20-ED
Input: 5-20V 3.25A Max
Output: 30W Max
The product is CQC certified.
This is the USB-C input port.
The ball head is made of metal.
It supports both adhesive and clamp mounting options. The base's adhesive sticker features important instructions.
Close-up of the base and the clamp.
The length of the panel is about 84.64 mm (3.33 inches).
The width is about 61.09 mm (2.41 inches).
The thickness is about 18.86 mm (0.74 inches).
That's how big it is in the hand.
The weight is about 127 g (4.48 oz).
It can securely hold the Xiaomi 17 Pro Max.
Once powered on, the phone successfully activates 30W wireless fast charging.
When the wireless charging power stabilizes, the output power of the charger is about 35.61W.
Teardown
Next, let's start to take it apart and take a look at the internal components.
Remove the front cover of the magnetic charging panel. On the inside of the cover, there is a strip-shaped magnet.
The magnet ring is fixed with adhesive, and the PCB is secured with screws.
The wireless charging coil is soldered to the PCB, with well-formed solder joints.
Beneath the wireless charging coil, there is a metal heat dissipation plate, which is secured with screws.
Remove all the internal components from the charging panel.
The USB-C socket is connected to the back of the PCB via a ribbon cable.
The socket is reinforced and protected with a steel casing, which is spot-welded in place.
A close-up of the ribbon cable soldered to the PCB.
The front of the PCB features a shielded cover over the wireless charging circuitry.
Remove the shield, revealing the wireless charging chip, NPO resonant capacitors, and other components.
The wireless charging chip is from CPS, model CPS8610. It is a highly integrated wireless charging transmitter chip with an embedded fast charging protocol. It supports fast charging power delivery, controls the external boost converter to supply power to the wireless charging stage, and allows for the connection of an external safety chip. The chip integrates a wireless charging power transistor, simplifies surrounding components, and uses an FCQFN package.
Close-up of the 20mΩ current sensing resistor.
A diode used for reverse polarity protection, marked with S56F.
Close-up of the NPO resonant capacitors.
The wireless charging coil is wound using Litz wire.
Close-up of the magnet ring and the metal plate.
Well, those are all components of the Xiaomi 30W Car Magnetic Wireless Charger.
Summary of ChargerLAB
Here is the component list of the Xiaomi 30W Car Magnetic Wireless Charger for your convenience.
It supports both adhesive and clamp mounting options. The ball head allows for 360° angle adjustment, accommodating different driving postures. The skin-friendly silicone magnetic surface is resistant to dust, and the deep space gray color is understated and versatile. It supports up to 30W wireless charging, fully unleashing the performance of the Xiaomi 17 series. With built-in eight-layer safety protection technology, it ensures comprehensive safety for in-car charging, providing a more secure charging experience during driving.
After taking it apart, we found that the internal design is quite simple, using the CPS8610 wireless charging SoC solution from CPS. With its ultra-high integration, a single chip is sufficient to achieve core functionality, significantly reducing design complexity, system costs, and enabling a compact design. The wireless charging circuit is covered by a shielding cover, the socket is protected by a steel casing, and the magnet ring is reinforced with adhesive. The workmanship and attention to detail are impressive.
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