Recently, Charging Head Network obtained a 100W GaN fast charger with a built-in cable launched by UGREEN. This product comes with a USB-C retractable fast charging cable, supporting 8-level length adjustment. It allows for instant charging upon pulling and retraction upon further pulling. The connector supports magnetic attachment, ensuring elegant storage.
In addition to the built-in cable, the body is equipped with three output ports (2C1A), totaling four interfaces. A single port supports up to 100W output and is compatible with fast charging protocols such as UFCS, QC3.0, PD3.0/PPS, etc.
This product easily meets the simultaneous charging needs of multiple devices, including thin laptops, tablets, and smartphones. Meanwhile, it features intelligent temperature control, effectively ensuring low-temperature high-efficiency operation.
To date, Charging Head Network's charger teardown reports have exceeded 1,500 models, covering nearly 60 Huntkey fast charging products.
Below, Charging Head Network provides a detailed teardown of this UGREEN 100W built-in cable charger to explore its internal craftsmanship and materials.
Product Appearance
The front of the packaging box features the UGREEN brand logo, with the product name "Retractable Cable GaN Fast Charger." Below, the 100W power rating and core selling points are printed.
An overview of the accessories inside the packaging box includes the charger unit, user manual, warranty card, etc.
The UGREEN 100W built-in cable GaN charger features a dark gray matte metal-textured shell. The front panel is configured with the built-in retractable cable and multiple output ports (2C1A).
From top to bottom on the front panel, there is the built-in USB-C retractable cable module, USB-C1, USB-C2, and USB-A interface. Each port is labeled with its corresponding name for easy user identification.
The side edges of the body feature smooth transitions, resulting in a simple yet elegant design. The pull-out end of the retractable cable is visible at the top, showcasing intricate engineering.
The other side of the charger features the UGREEN brand logo.
When stored, the built-in cable connector integrates seamlessly with the body, avoiding any protrusion.
A slightly recessed circular element at the top serves as an aesthetic highlight, adding a touch of dynamism to the product.
The bottom of the charger features a black design with foldable new national standard prongs and detailed product specifications printed.
Product parameters are as follows:
Name: 100W Retractable Cable GaN Fast Charger
Model: X606
P/N:65591
S/N: DF5P0039310102253
Manufacturer: Shenzhen UGREEN Technology Co., Ltd.
Origin: Made in China
Input:
100~240V, 50/60Hz, 1.8A Max
Output:
USB-C Built-in Cable Output: 5V 3A, 9V 3A, 12V 3A, 15V 3A, 20V 5A, 100W Max
USB-C1 Port Output: 5V 3A, 9V 3A, 12V 3A, 15V 3A, 20V 5A, 100W Max
USB-C2 Port Output: 5V 3A, 9V 3A, 12V 2.5A, 15V 2A, 20V 1.5A, 30W Max
USB-A Port Output: 5V 3A, 9V 2A, 12V 1.5A, 10V 2.25A, 22.5W Max
Total Output Power: Maximum 100W
The product has passed CCC certification.
Close-up of the unfolded new national standard foldable prongs, facilitating daily storage while preventing scratches to other items in bags.
The extracted built-in USB-C retractable cable features a flat anti-tangle design. The connector has a metal housing printed with the UGREEN logo.
Product Dimensions and Weight
Measured with a tape measure, the maximum extension length of the built-in retractable cable is approximately 72.5 cm.
Measured with calipers, the charger body length is approximately 57.02 mm.
The measured charger body width is approximately 50.53 mm.
The measured charger body height is approximately 69.08 mm.
Compared with Apple's original 70W charger, it is evident that despite integrating the retractable cable module, UGREEN's product maintains excellent volume control.
Weighed on a digital scale, the charger weighs approximately 303.8 g.
Product Fast Charging Protocol Test
Tested using POWER-Z KM003C, the USB-C retractable cable supports UFCS, QC3+, PD3.0/PPS, DCP, SAMSUNG 5V2A, and Apple 2.4A fast charging protocols.
PDO messages indicate that the USB-C retractable cable offers five fixed voltage profiles: 5V3A, 9V3A, 12V3A, 15V3A, and 20V5A, along with one PPS profile of 5-21V 5A.
Test results show that the USB-C1 port supports QC3.0, FCP, SCP, AFC, SFCP, PD3.0/PPS, DCP, SAMSUNG 5V2A, and Apple 2.4A fast charging protocols.
The PDO message for the USB-C1 port is consistent with that of the USB-C retractable cable.
Test results show that the USB-C2 port supports QC3.0, FCP, SCP, AFC, SFCP, PD3.0/PPS, DCP, SAMSUNG 5V2A, and Apple 2.4A fast charging protocols.
The PDO message for the USB-C2 port indicates five fixed voltage profiles: 5V3A, 9V3A, 12V2.5A, 15V2A, and 20V1.5A, along with one PPS profile of 5-11V 2.75A.
Test results show that the USB-A port supports QC3.0, FCP, SCP, AFC, DCP, SAMSUNG 5V2A, and Apple 2.4A fast charging protocols.
Product PCBA Overview Analysis
After opening the bottom cover along the prong module, the connection between the PCBA module and the foldable prong module via black and white wires is visible. The interior is filled with a large amount of white thermal potting compound to enhance overall heat dissipation performance.
All internal components were removed, including the prong bottom cover, retractable cable module, PCBA main board module, and outer casing.
The retractable cable module uses a semi-transparent white plastic shell encapsulation, featuring a central clockwork mechanism and multiple wires leading out for power supply connection to the main board.
Overview of the disassembled module.
Measured with calipers, the overall length of the PCBA module is approximately 43.71 mm.
The measured overall width of the PCBA module is approximately 44.52 mm.
The measured overall height of the PCBA module is approximately 52.89 mm.
After cleaning off the thermal potting compound, the AC input side of the PCBA module reveals two high-voltage filter electrolytic capacitors and a transformer.
On the other side of the PCBA module, safety X-capacitors, common-mode chokes, red film capacitors, and other components are visible. The internal component layout is very compact.
Turning to another side of the PCBA module, two rectifier bridges are visible.
The primary controller chip is located on the opposite side.
Overview of the output side shows three USB female sockets, buck inductors, and filter capacitors. Overall, the product adopts a PFC+QR+SR switching power supply architecture.
Further disassembly of the PCBA module reveals a stacked structure composed of multiple PCBs, effectively utilizing internal vertical space and significantly reducing product volume.
Front view of the input filter sub-board, featuring fuses, safety capacitors, common-mode chokes, filter inductors, and filter capacitors.
The back of the input sub-board houses two rectifier bridges.
One side of the PFC sub-board features the PFC controller chip, PFC filter diode,贴片 Y-caps, optocoupler, synchronous rectification controller, and synchronous rectification MOSFETs.
The other side of the PFC sub-board contains output filter capacitors and the PFC inductor.
One side of the primary controller sub-board features the primary controller chip.
The other side of the primary controller sub-board contains the primary controller chip's power supply capacitor, high-voltage filter capacitor, and transformer.
One side of the buck output sub-board features the 2C1A three interface sockets, buck inductors, and output filter capacitors.
The other side of the buck output sub-board contains protocol chips, buck switching MOSFETs, VBUS switches, and other components.
Primary Side Circuit Analysis
Close-up of the input delay fuse from LB Lanbao, rated 3.15A 250V, used for overcurrent protection.
Close-up of a thermal protector, which automatically triggers protection when the temperature reaches 65°C.
Close-up of the NTC thermistor, used to suppress inrush current during power-on.
Close-up of the safety X2 capacitor from DGCX Chengxi, with a capacity of 0.22μF.
Close-up of the common-mode choke, used to filter EMI interference.
Two input-side rectifier bridges from Huixin, model RHBS810, rated 1000V 8A, in HBS package.
Close-up of the red film capacitor, also from DGCX Chengxi.
The second red film capacitor has the same model number.
Close-up of two filter inductors, insulated with heat shrink tubing.
The PFC co-packaged chip is from SOUTHCHIP, model SC3252. It is a PFC controller integrating a 650V GaN switch. The chip supports multi-mode control strategies, operating in Critical Conduction Mode (CrCM) under heavy and full loads, and Discontinuous Conduction Mode (DCM) under light loads. High efficiency is achieved through valley switching and reduced switching frequency. The chip supports boost follow mode without requiring an auxiliary winding.
SC3252 supports burst mode operation, achieving high conversion efficiency across the entire load range. It features supply undervoltage protection, cycle-by-cycle overcurrent protection, output overvoltage protection, inductor continuous conduction mode protection, and over-temperature protection. It supports a supply voltage range of 9-30V and uses an ESOP-10W package.
A PFC diode from NiuHang, model SF8JQ, rated 600V 8A, in TO-277 package.
Close-up of the PFC boost inductor.
High-voltage filter electrolytic capacitor from Koshin Dongjia, rated 420V 47μF.
Close-up of the second Dongjia high-voltage electrolytic capacitor, rated 420V 27μF.
The electrolytic capacitor powering the controller chip is from CapXon Fengbin, rated 10μF 50V.
The built-in primary controller chip is from Southchip, model SC3057B. This is a high-frequency quasi-resonant flyback PWM converter integrating a 700V GaN device, achieving high efficiency and reliability.
The chip features built-in X-capacitor discharge functionality and a high-voltage startup circuit via the HV pin. Consequently, extremely low standby power consumption and ultra-fast startup time can be achieved through the HV pin.
SC3057B provides adaptive switching frequency foldback to achieve higher efficiency across the entire load range. It operates with valley switching in QR and DCM modes to improve efficiency. Under no-load conditions, the IC operates in pulse mode to reduce power consumption.
SC3057B features low startup current, fast startup, and low standby power consumption. The extremely low operating current (350uA) in pulse mode significantly reduces standby power to comply with efficiency regulations. SC3057B offers comprehensive protection functions to prevent circuit damage under abnormal conditions.
Additionally, frequency jittering and smart drive functions minimize noise and improve EMI performance. SC3057B uses a QFN6x8 package.
Close-up of the transformer, marked 170-00810-A20.
Close-up of the EL1018 optocoupler used for feedback regulation of the output voltage.
The surface-mount Y-capacitors are from Sichuan Terui Xiang Technology Co., Ltd., characterized by small size and light weight, making them ideal for high-density power products like GaN fast chargers. Part number: TMY1471K.
Data information for Terui Xiang surface-mount Y-capacitors.
The second surface-mount Y-capacitor is also from Terui Xiang, part number TMY1471K.
Synchronous Rectification Circuit Analysis
The synchronous rectification controller is from Southchip, model SC3503. It is an adaptive turn-on detection and fast turn-off synchronous rectification controller that does not require auxiliary coil power supply, allowing the output voltage to drop as low as 0V.
The chip's patented adaptive turn-on detection circuit prevents false turn-on of the synchronous rectification MOSFET, is compatible with various MOSFETs, features ultra-low quiescent current, supports multiple operating modes, supports both high-side and low-side synchronous rectification, and requires minimal external components.
Data information for Southchip SC3503 is shown above.
Two synchronous rectification MOSFETs are from Wayon, model WMB080N10LG4. These are NMOS transistors with a breakdown voltage of 100V and RDS(on) of 7.8mΩ, in PDFN5060 package.
Buck Output Circuit Analysis
Close-up of two filter solid-state capacitors, both rated 25V 820μF, used for output filtering.
A buck protocol chip from iSmartWare, model SW3537U. The chip internally integrates a 5A high-efficiency synchronous rectification buck converter.
The chip supports charging protocols such as PPS, PD, QC, AFC, FCP, SCP, PE, SFCP, and low-voltage direct charging. It supports CC/CV modes. With only a few external components, it forms a complete high-performance multi-protocol dual-port charging solution, widely applied in car chargers, adapters, and power strips.
Thanks to the chip's high integration level, SW3537U integrates the protocol chip, synchronous buck controller, and buck MOSFETs of traditional buck solutions into a single package, greatly simplifying the circuit design for multi-port fast charging. The chip supports A+C dual-port fast charging applications, features comprehensive protection functions, and uses a QFN-37 package.
The second buck protocol chip is the iSmartWare SW3561H, a buck SoC chip supporting dual USB-C port output. The chip internally integrates a high-efficiency synchronous buck controller, supports 20V 5A power output, and supports USB PD3.1 SPR.
The chip internally integrates an ARM Cortex-M0 core, Type-C logic, and supports fast charging protocols such as PD3.1/QC/SCP/UFCS converged fast charging, with support for custom fast charging protocols.
iSmartWare SW3561H supports dual USB-C port path control and cable loss compensation. Combined with two synchronous buck switching MOSFETs and corresponding VBUS switches for each interface, it achieves dual-port buck output.
The built-in buck converter operates at a default frequency of 180KHz, supports customizable operating frequencies, and supports 100W power output, meeting small-size design requirements. The chip integrates over-temperature protection, input/output overvoltage/undervoltage protection, output overcurrent protection, and data pin overvoltage protection, among other comprehensive protection mechanisms. It uses a QFN-32 package.
Another buck protocol chip is also from iSmartWare, model SW3536. This is a highly integrated multi-protocol dual-port charging chip supporting USB-A + USB-C dual-port fast charging output, with independent current limiting for both ports.
The chip internally integrates a 7A high-efficiency synchronous buck converter, supporting various fast charging protocols such as PPS/PD/QC/AFC/FCP/SCP/PE/SFCP/TFCP, with a maximum output power of 140W.
SW3536 integrates CC/CV modes, dual-port management logic, and dynamic power allocation between dual chips. With simplified external components, it constitutes a complete high-performance multi-protocol dual-port charging solution. SW3536 supports 36V input voltage, suitable for12-24V input car charger applications, and applicable to fast charging adapters, power strips, and car chargers.
Two synchronous buck switching MOSFETs are from iSmartWare, marked SWT40N45.
Two additional synchronous buck switching MOSFETs are also from iSmartWare, marked SWT40N45.
A VBUS switch marked B3006.
The second VBUS switch marked B3006.
The third VBUS switch marked B3006.
The fourth VBUS switch marked B3006, corresponding to the four output interfaces respectively.
A 25V 100μF solid-state filter capacitor.
Two HEC Dongyangguan 25V 150μF solid-state filter capacitors.
A 25V 100μF solid-state filter capacitor.
A 25V 100μF solid-state filter capacitor.
Another HEC Dongyangguan 25V 150μF solid-state filter capacitor.
The product also includes an NTC thermistor to prevent overheating.
Complete teardown finished; here is a family photo of all parts.
Charging Head Network Summary
Finally, the product's Bill of Materials (BOM) is attached for reference.
In terms of appearance, the UGREEN 100W built-in cable GaN charger adopts the family-style deep space gray color scheme with rounded body lines. Regarding interface configuration, the combination of a built-in USB-C cable plus 2C1A four ports is compatible with mainstream fast charging protocols, easily handling the charging needs of multiple devices.
The teardown reveals a compact internal design. The PCBA module surface is covered with a large amount of thermal potting compound, effectively enhancing heat dissipation and drop resistance performance. Coupled with intelligent temperature control, it prevents overheating, providing peace of mind during daily use.
In component selection, the primary side utilizes Southchip SC3252 PFC co-packaged chip and SC3057B co-packaged GaN chip, offering high integration and saving board area. The synchronous rectification section selects Southchip SC3503 paired with Wayon synchronous rectification MOSFETs.
The buck output employs three buck protocol chips from iSmartWare: SW3537, SW3561H, and SW3536. Paired with iSmartWare's own buck MOSFETs and B3006 marked VBUS switches, it achieves multi-interface buck output and intelligent dynamic power distribution.
Furthermore, the internal capacitors are sourced from brands such as Dongjia, Terui Xiang, and Dongyangguan. Working in conjunction with the aforementioned components, they ultimately enable a total output of up to 100W.
Overall, this UGREEN product is a 100W fast charger that balances convenience with quality craftsmanship and materials, making it highly suitable for users with multiple devices.