Introduction

ChargerLAB has just unboxed and torn down UGREEN's latest 30W USB-C GaN charger kit. The retail bundle includes the ultra-compact 30W charging brick alongside a USB-C to USB-C cable.

Designed with maximum portability in mind, the charger is remarkably small and travel-friendly. When it comes to device compatibility, it hits all the right notes: testing confirms support for a wide array of industry-standard protocols like PD3.0/PPS, QC, FCP, SCP, and AFC. Crucially, UGREEN has also baked in support for the UFCS fusion fast-charging protocol, ensuring rapid power delivery for the vast majority of modern smartphones, tablets, and mobile gadgets.

Eagle-eyed readers might remember ChargerLAB previously analyzed UGREEN’s legacy 30W GaN model, but it’s time to see how the new iteration stacks up.

Let's dive right into the comprehensive teardown to examine the internal components and engineering excellence packed inside.

Product Appearance

Teardown of the UGREEN 30W USB-C GaN Fast Charger-Chargerlab

The packaging box sports a clean white and green aesthetic, featuring the UGREEN logo in the top-left corner. A transparent display window sits prominently in the center, giving users a clear look at the charger inside. The base of the box is clearly labeled with the product name: "30W USB-C GaN Fast Charger Kit."

The back of the box is detailed with the product's compatible device list and spec parameters.

Opening the box, you'll find the 30W fast charger unit, one USB-C to USB-C data cable, and the product warranty/instruction manual.

The included USB-C to USB-C cable features a white exterior and is neatly bundled with a cable tie, appearing highly organized.

The USB-C connectors at both ends of the cable, the "UGREEN" brand logo is recessed and stamped on the housing, showing exquisite workmanship with no burrs on the injection molding.

The length of the integrated cable is approximately 100cm.

ChargerLAB POWER-Z KM003C shows that the cable supports that it doesn't contain an E-Marker chip.

The unit adopts a pure white glossy shell with smoothly rounded edges, featuring the UGREEN brand logo on the side.

With an ultra-minimalist, compact, and premium design, it is perfectly tailored for travel and everyday carry.

It's output panel features a matte frosted finish, equipped with a single USB-C port in the center. The text "USB-C" is printed above the port.

The input end adopts fixed Chinese standard two-prong pins.

The input plug side is imprinted with the following product specs:

Model: X214

Input: 200-240V~50Hz 400mA Max

USB-C Output: 5.0V/3.0A, 9.0V/3.0A, 12.0V/2.5A, 15.0V/2.0A, 20.0V/1.5A

Total Output Power: 30.0W

Country of Origin: Made in China

Manufacturer: Ugreen Group Limited (Shenzhen)

The product features the CCC certification mark and a safety symbol for use at altitudes below 2,000 meters.

The length of the charger is about 43.79mm (1.724 inches).

The width of the charger is about 41.87mm (1.648 inches).

The thickness of the charger is about 25.83mm (1.017 inches).

The weight is about 48.9g (1.72 oz).

Put it with Apple’s 30W dynamic charger, it is noticeably smaller overall.

That's how big it is in the hand.

ChargerLAB POWER-Z KM003C shows that the USB-C port supports UFCS 1.0, QC3.0, FCP, SCP, AFC, PD3.0/PPS, QC4+, DCP and Apple 2.4A.

And it also supports five fixed PDOs of 5V3A, 9V3A, 12V2.5A, 15V2A and 20V1.5A, and features a PPS subset: 5.00-11.00V 2.75A.

Further reading of the UFCS protocol info indicates support for the 5.00-11.00V 2.75A output profile.

With the initial look at the hardware design and protocol compatibility, it’s time to get under the hood. ChargerLAB now brings you the full technical teardown.

Teardown

Pry open casing along the edge of the input plug end and pull out the internal PCBA, the pins make contact with the circuit PCB for power supply via internal metal springs. White thermal potting compound is applied on the PCBA for securing components.

The internal input plug terminal, utilizing two metal springs to connect the prongs to the PCBA.

The front of the PCBA shows that the primary and secondary components are densely arranged. A significant amount of white potting compound is applied around the components to provide mechanical reinforcement and facilitate thermal dissipation, ensuring operational stability.

On the other side, there is a significant amount of white potting compound between components such as the input connection contacts, fuse, caps, and transformer. Meanwhile, a black isolation insulating sheet is placed between the primary and secondary sides.

A black insulating sheet is attached to the back of the PCBA, clearly separating the primary and secondary sides.

The length of the PCBA is about 9.53mm (0.375 inches).

The width of the PCBA is about 38.56mm (1.518 inches).

The thickness of the PCBA is about 19.32mm (0.761 inches).

After clearing the most of the white potting compound on the front of the PCBA, the complete circuit layout becomes clearly visible.

The front of the PCBA is populated with the primary filter cap, the power supply cap for the master control chip, low-voltage filter caps, the transformer, the input EMI filtering circuit, and the USB-C port.

The USB-C receptacle at the output end, which is encased in a metal shield and soldered directly to the mainboard, effectively enhancing plug/unplug durability and stability.

There is a clear boundary between the primary and secondary sides on the back of the PCBA, featuring a rectifier bridge, primary and secondary master control chips, and a protocol chip.

The time-delay fuse at the input end, which is from SET.

The NTC thermistor at the input end.

The rectifier bridge on the primary side is from PINGWEI, model ABSR210, in an ABS package.

The I-shaped choke, which is insulated with a heat-shrink tubing.

The primary high-voltage filtering section employs two electrolytic caps from Koshin, both with a spec of 400V 15μF.

The primary master control chip is from JOULWATT, model JW15158B. It is an isolated flyback converter with an integrated GaN MOSFET. The chip supports both PWM and PFM control, enabling high efficiency across varying input and load conditions.

The JW15158B supports high-voltage startup with a wide supply voltage up to 90V. It integrates an internal 650V 1200mΩ GaN switch and operates at a maximum switching frequency of 110kHz.

It supports supply OVP, output OVP/UVP, input UVP, current sense resistor open protection, cycle-by-cycle OCP, OPP, internal OTP. It also features frequency jittering to enhance EMI performance. The JW15158B is available in a thermally enhanced HSOP7 package and supports PD fast charging as well as SMPS applications.

The power supply cap for the master control chip is also from Koshin, spec 100V 4.7μF.

The transformer, with a label on top marked with X214-15158-T1 2510 007.

The blue Y cap bridging the primary and secondary sides, marked CY471K.

The optocoupler, marked CT 1019 V433K, utilized for communication and feedback regulation between the primary and secondary sides.

The synchronous rectifier chip is from JOULWATT, model JW7726AD, housed in an SOP-8 package. It is a 100V-rated synchronous rectifier chip with an integrated 10mΩ low on-resistance MOSFET, specifically designed for secondary-side rectification in isolated topologies.

It comprehensively supports the active clamp flyback architecture and is compatible with various flyback operating modes, including DCM, CrCM, CCM, and QR. Compared to traditional Schottky diode rectification solutions, the JW7726AD can drastically reduce conduction losses and significantly boost the overall conversion efficiency of the power system.

Additionally, it supports direct VCC power supply from the output voltage and features ultra-low quiescent current. It also provides rapid gate-drive capability optimized for CCM operation.

The JW7726AD incorporates high-precision drain-source voltage detection. When the system detects that the MOSFET Vds voltage falls below -140mV, it automatically turns on the internal MOSFET for rectification. Once the Vds voltage rises above -6mV, it rapidly turns off the internal MOSFET, effectively preventing reverse current and ensuring efficient and reliable system operation.

The output solid filtering cap is from BERYL, spec 25V 470μF.

The protocol chip is also from JOULWATT, model JW7701D, housed in an ESOP-8 package.

It is certified by the USB-IF for USB PD3.1 PPS (TID: 10615). Beyond the PD protocol, it offers broad compatibility with mainstream fast-charging protocols, including Qualcomm QC2.0/3.0/3.0+, FCP/HVSCP, MTK PE2.0, AFC, Xiaomi 27W Charge Turbo, as well as USB BC1.2 DCP and Apple 2.4A standards.

The chip integrates an internal 15mΩ low-impedance VBUS path switch MOSFET, a 10mΩ current sensing resistor, a feedback network, and CV/CC loop driver circuits, simplifying peripheral circuit design and reducing BOM.

Furthermore, the JW7701 incorporates multiple comprehensive safety protection mechanisms, including input OVP/UVP, output OCP/short-circuit, OTP, and CC pin OVP. It also supports cable loss compensation up to a maximum of 200mΩ, ensuring a safe and stable charging process.

Well, those are all components of the UGREEN 30W USB-C GaN Fast Charger.

Summary of ChargerLAB

UGREEN’s 30W USB-C GaN charger maintains the brand's signature sleek, minimalist aesthetic, shipped complete with a USB-C to USB-C cable. Broad protocol support—including UFCS, USB PD, and PPS—ensures it easily handles the daily power needs of your devices.

Peeking inside, the charger boasts a highly dense and compact PCB layout. White thermal potting compound fills the areas around primary and secondary components, providing both structural reinforcement and enhanced thermal dissipation, while a distinct safety barrier separates the high- and low-voltage circuits.

Under the hood, UGREEN relies on a unified, highly integrated chipset from JOULWATT. This includes the JW15158B GaN integrated flyback converter, the JW7726AD synchronous rectifier, and the feature-rich JW7701D protocol chip. Ripple suppression is handled by Koshin high-voltage filter caps on the input and a reliable BERYL solid cap on the output.

Ultimately, this travel-friendly kit delivers excellent portability without compromising on universal fast-charging versatility.