Tear down of Xiaomi 140W 8-in-1 GaN Desktop Charging Station

Xiaomi’s new 140W 8-in-1 GaN desktop charger integrates new standard AC sockets and high-speed GaN charging modules beyond basic power strip functions. It supports 120W Xiaomi Hyper Charge, 140W PD3.1 for laptops and 100W PD output, plus a low-current port for small wearables. Follow our full teardown to check its internal design and components.

Unboxing: Xiaomi 140W 8-in-1 GaN Desktop Charging Station

Xiaomi logo, product title and unit rendering are printed on the front panel of the package.

Product selling points, detailed specs and supplier info are displayed on the rear side of the package.

Close-up of box specs, full details on the real product will follow.

The package contains the main unit, a charging cable, and an official user manual.

The included cable is USB-C to USB-C. Marked with "6A" on the strain relief, it supports 6A high current to realize HyperCharge for Xiaomi devices.

Cable length: ~101cm

We tested the cable with the ChargerLAB POWER-Z KM003C tester. It comes with an E-Marker chip, supporting 50V 5A power delivery and USB 2.0 data transfer.

This Xiaomi 140W desktop charging station comes with a three-prong power cord, featuring a minimalist and elegant overall design.

The power cord is fitted with a slim compact plug built with recessed grooves for easy insertion and removal, and its pins comply with new national standards.

Relevant brand and specification markings are printed inside the plug. Rated 10A 250V~, it has obtained CCC certification.

The charging station features a flame-retardant PC plastic casing. Its top panel adopts AG matte coating and optical film treatment, resisting smudges and fingerprints while delivering an exquisite smooth texture.

A rubber strain relief sleeve reinforces the joint between the power cord and main unit. Two dual-pin AC outlets are arranged on the rear of the charging station.

An overload protection button is installed between the sockets.

Two sets of 3+2 new national standard combo sockets are equipped on the top, with "MAX 2500W" printed on the edge to indicate the total load power, easily meeting various charging demands.

Four USB ports (2 Type-C + 2 Type-A) are arranged on the front, with serial numbers and output specs printed beside each port for clear identification.

Indicator lights sit above the ports, and the text "Low Current Power Supply" is printed below USB-A2.

“140W GaN” is printed on one side of the unit, indicating its built-in fast charging module adopts gallium nitride technology.

Four raised anti-slip pads are fitted at the four corners of the base, and full product specifications are printed on the casing.

Close-up of Product Specifications:
Product Name: Extension Socket (with Power Adapter) Model: XMCDZ-03QM Technical Ratings: MAX 2500W, MAX 10A, 250V~ Total USB Output Power: MAX 140W USB Module Input: 200-240V~, 50Hz, MAX 2.5A

Single Port Output: USB-C1: 5V3A, 9V3A, 11V6.1A, 12V3A, 15V3A, 20V6A, 28V5A, MAX 140W USB-C2: 5V3A, 9V3A, 11V6.1A, 12V3A, 15V3A, 20V6A, 28V5A, MAX 140W USB-A1: 5V3A, 9V3A, 10V2.25A, 11V6.1A, 12V3A, 15V3A, 20V6A, MAX 120W USB-A2: 5V1A, MAX 5W.

Manufacturer: Qingmi (Beijing) Technology Co., Ltd. This product has obtained CCC certification.

The actual measured length of the power cord is approximately 95 cm.

The length of the charging station main body is 70.99 mm.

Width: 94.85 mm

Thickness: 53.1 mm

A hands-on feel of the charging station's size.

The intuitive feel of the charging station unit's size when held in hand.

The USB-C1 port is measured to support QC3+/5, FCP, SCP, AFC, PD3.1, PPS, DCP, and Apple 2.4A charging protocols.

PDO analysis reveals that the USB-C1 port delivers six fixed voltage levels: 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/5A, and 28V/5A, plus two PPS ranges: 5-11V/6.1A and 5-20V/6A.

The USB-C1 port also supports Xiaomi 120W HyperCharge.

The USB-C2 port supports the same protocols as USB-C1.

In addition, the PDO messages were found to be identical.

The USB-C2 port also supports Xiaomi 120W HyperCharge.

The USB-A1 port supports QC3+, FCP, SCP, AFC, PD3.0, DCP, and Apple 2.4A.

The USB-A2 port, on the other hand, supports only the DCP charging protocol.

Xiaomi 140W Desktop Charging Station Teardown

The front panel is fixed with double-sided tape. Inside, four anti-tamper screws are positioned at the corners.

After removing the screws and opening the inner cover plate, it is also secured with snap-fit clips.

Then, pull out the internal module.

The module measures 65.66 mm in length.

The width is 90.11 mm.

The thickness is 49.14 mm.

The bottom and front of the module are covered with metal heat sinks.

Under the front metal plate, copper foil is attached, and thermal pads are placed inside.

Copper foil is also applied to the side metal plate.

The bottom features a large heat sink, held in place by screws at the corners.

The USB fast charging module draws power from the AC socket module through red and black wires.

The module is then taken apart to allow for a more detailed look.

Thermal pads are placed on the inner side of the metal heat sinks to facilitate heat transfer and improve heat dissipation.

Overview of the AC socket module, featuring a one-piece copper strip inside.

The PCBA module consists of two boards soldered perpendicularly to each other. On the front side of the main board, blue thermal adhesive fills the area around capacitors, transformers, and other components. Thermal pads are placed on the PFC boost inductor and transformer, and the solid-state filter capacitors on the side are fitted with insulating sleeves.

Next, the two boards are separated, and the thermal adhesive and thermal pads are cleaned away.

The back side is populated with components including a bridge rectifier, PFC boost controller, PFC MOSFET, PFC rectifier diode, AHB controller, AHB MOSFET, synchronous rectification controller, synchronous rectifier MOSFET, optocoupler, and SMD Y-capacitors.

The common-mode choke is wound with bifilar wire to filter out EMI interference.

The X2 safety capacitor is supplied by Dongguan Chengxi Electronics and is rated at 0.47μF.

The WRLSB60M bridge rectifier, supplied by Shenzhen World Industrial Co., Ltd., is a soft recovery bridge that features a soft recovery curve and smooth turn-off characteristics. This design reduces the diode junction capacitance and minimizes harmonic oscillations. The LSB package provides excellent thermal performance, enhancing the reliability of medium to high-wattage adapters.

A PFC switching MOSFET from Infineon is used here, marked 60S180P7, with the full part number IPD60R180P7S. This CoolMOS P7 series device is rated at 650V with an on-resistance of 180mΩ and comes in a TO252-3 package.

A PFC rectifier diode with marking MUR560 is used here, packaged in TO277. A bypass diode marked ES5J is also present.

Four high-voltage electrolytic filter capacitors are employed on the primary side.

All four high-voltage electrolytic capacitors are supplied by Junkang, each rated at 420V 33μF.

The primary power controller is a Richtek RT7795M. This PWM controller is designed for asymmetric half-bridge (AHB) converters, incorporating a 625V high-voltage startup circuit. It supports output power up to 300W and a wide 5-48V output range. The IC also includes X-capacitor discharge and operates in continuous resonant mode, which helps reduce losses in the secondary-side synchronous rectifier.

The RT7795M integrates a driver that directly drives GaN or MOSFETs, making the design more compact. VCC supports a wide range from 11V to 63.2V. It also provides PFC switching control, which improves design flexibility and efficiency for different power conversion needs. The controller comes in a WQFN-24L package.

The VCC capacitor for the primary controller IC is also supplied by Junkang, rated at 50V 22μF.

An Innoscience INN700TK240B is used as the AHB switching MOSFET. This enhancement-mode GaN switch is rated at 700V (800V transient) with 240mΩ on-resistance. It meets JEDEC industrial standards, includes ESD protection, and comes in a TO252 package.

The Innoscience INN700TK240B is widely used in energy storage systems, home appliances, LiDAR, smartphones and laptops, fast chargers, and adapters, with cumulative shipments exceeding 2 billion units.

The resonant capacitor is supplied by Chengxi Electronics, rated at 0.68μF 250V.

The synchronous rectifier MOSFET is supplied by JJWD JieJie Microelectronics, model JMSL1006PG. It is an N-channel MOSFET rated at 100V with an on-resistance of 4.3mΩ, and is housed in a PDFN5×6-8L package.

Two output filter solid-state capacitors are used, each rated at 35V 820μF.

Filter Inductor Close-up

The front of the output sub-board is equipped with indicator lights, step-down inductors, solid-state filter capacitors for secondary step-down output and other components.

Another HONOR AER4051AP synchronous buck switch resides on the reverse of the sub-board.

Southchip SC8002 serves as the synchronous buck controller for USBC Port 2.

It is paired with two HONOR AER4051AP synchronous buck switches.

It is paired with two HONOR AER4051AP synchronous buck switches.

Inductors for the three buck circuits are insulated with heat-shrink tubing.

Secondary step-down output solid-state filter capacitors adopt insulating plastic sleeves, 35 V 220 μF.

USB-C Female Connector Close-up

USBA1 Female Connector Close-up

USB-A2 Female Connector Close-up

Full disassembly completed.

ChargerLAB Teardown Summary

Finally, the list of core components of the Xiaomi 140W Desktop Charging Station is attached for reference.

The Xiaomi 140W 8-in-1 GaN Desktop Charging Station accurately addresses modern users’ core demands for desktop power supply: integration, high performance and attractive appearance. It successfully integrates an AC outlet with a maximum load capacity of 2500W and a multi-port GaN fast charging module with a total output power of 140W, delivering full-scenario power supply for appliances and small electronic devices.

As revealed by the teardown, the secondary step-down circuit inside the device adopts Southchip SC8002 controllers paired with HONOR MOSFETs to implement multiple independent high-efficiency step-down channels. Protocol identification is handled by Injoinic IP2738U / IP2736U. The entire PCBA module is covered with a large-area metal heat sink and thermal pads to guarantee stable operation under high power density.

Overall, the Xiaomi 140W Desktop Charging Station is a well-designed integrated productwith solid component selection.