Teardown of UGREEN 65W 3-in-1 Nexode RG GaN Charger (CD361)
Introduction
ChargerLAB has introduced the UGREEN Nexode RG charger series, which has a striking and unique robot design. It is also equipped with a display that can help you check the charging mode directly. Today, we got a 65W version from this exact series. Let's take it apart to see its internal components.
Product Appearance
The front of the box has a translucent design with UGREEN and 65W printed on it, and the charger can be seen through the box.
There are four selling points printed on one side: GaN, temperature control, compatible with laptops, tablets, phones, and other devices, and can charge MacBook Air 13-inch to 70% in 60 minutes.
All specs info are printed on the back, we'll look at the info later.
The charger and some documents are in the box.
There is a protective film on the display on the front.
As a member of the UGREEN Nexode RG charger series, it looks like a cool and adorable robot.
The UGREEN logo is printed under the display.
There is a black "headset" on the top, giving it a trendy look.
The two sides have a concave design to fit your fingers.
There are one purple USB-A and two black USB-C ports on the top.
The devices it is compatible with are printed next to the ports.
The 65W is engraved on the back.
The detachable "shoe covers" make the charger more stable when not in use.
The "shoe covers" can also protect the AC plugs. It has internal magnet for better fixing.
All specs info are also printed here, the same as what is printed on the box.
Model is CD361. It can support input of 100-240V~50/60Hz 1.8A. When used individually, the highest output for USB-C1 to USB-A is 65W, 30W, 22.5W, respectively. And the total output power can reach 65W.
The length is about 67 mm (2.64 inches).
The length is about 50 mm (1.97 inches) after removing the "shoe covers."
The width is about 47 mm (1.85 inches).
And the thickness is about 43 mm (1.69 inches).
It is obviously smaller than the Apple 61W charger.
This is what it looks like in the hand.
The weight is about 139 g (4.9 oz).
The weight is about 131 g (4.62 oz) after removing the "shoe covers."
The display has three distinct smiling face modes. It will display a relaxed expression when without load.
It will display a cheerful whistling face while charging.
And a jubilant face will be displayed when the device is fully charged.
ChargerLAB POWER-Z KM003C shows that USB-C1 can support FCP, SCP, AFC, QC3.0/5, SFCP, PE2.0, PD3.0, PPS, DCP, SAM 2A, and Apple 2.4A charging protocols.
And it has five fixed PDOs of 5V 3A,9V 3A,12V 3A,15V 3A,20V 3.25A and a set of PPS, 3.3-21V 3A.
The USB-C2 supports FCP, SCP, AFC, QC3.0/4+, SFCP, PE2.0, PD3.0, PPS, DCP, SAM 2A, and Apple 2.4A charging protocols.
And it has five fixed PDOs of 5V 3A,9V 3A,12V 2.5A,15V 2A,20V 1.5A, and a set of PPS, 3.3-11V2.75A.
The USB-A supports charging protocols such as FCP, SCP, AFC, QC3.0, SFCP, PE2.0, DCP, SAM 2A, and Apple 2.4A.
Teardown
Next, let's start to take it apart.
First, pry along the gap and remove the bottom cover. The PCBA module is filled with pink potting compound for better heat dissipation.
Use a cutting machine to remove the remaining cover and take out the PCBA module.
The PCBA module is composed of multiple small PCBs.
There is a black plastic cover above the display and a thermal pad for heat dissipation.
The height of the PCBA module is about 37 mm (1.46 inches).
The width is about 35 mm (1.38 inches).
And the length is 44 mm (1.73 inches).
There is a black plastic bracket between the components for isolation.
It is used to insulate the transformer and output PCB.
These seven LED indicator lights are under the black plastic cover.
Separate the PCBA module into three small PCBs. The PCB of the switching power supply is on the left, the PCB of input and synchronous rectification is in the middle, and the buck PCB is on the right.
ChargerLAB found it adopts a flyback topology, with synchronous rectification and fixed voltage output. And it has two synchronous buck circuits to achieve three-port fast charging and automatic power distribution.
Next, take a look at each component, starting from the input end.
The input fuse and capacitors are on the PCB of input and synchronous rectification.
The input fuse is from WalterFuse. 3.15A 250V.
The safety X2 capacitor is from DGCX. 0.1μF.
The common mode choke is wound with magnet and insulated wires, and it's also insulated with bakelite.
The bridge rectifier is from World Industrial and adopts LSB package. It has good heat dissipation. Model is WRLSB80M.
Here is all the information about World Industrial WRLSB80M.
The NTC resistor, differential mode chock, and capacitors are on the PCB of the switching power supply.
The NTC resistor marked with 1.5D-7 is used to suppress surges.
The differential mode chock is wound with an I-shaped magnetic core and is insulated by heat-shrinkable tubing.
These two electrolytic capacitors for input filtering are from Acon. 47μF 400V for each.
The GaN IC is on the back.
The GaN IC is from SouthChip and adopts QFN6 x 8 package. It integrates the multi-mode flyback controller, GaN driver, 165mΩ GaN FET, and power supply and protection circuits. Model is SC3057.
It supports a switching frequency of up to 175KHz.
The magnetic core of the transformer core is insulated by tape.
These two SMD Y capacitors are from TRX. The small size and light weight are suitable for high-density power products such as GaN fast chargers.
Here are some information about TRX products.
The optocoupler is from CTMICRO and is used for output voltage feedback. Model is CT1018.
The synchronous rectifier controller is from SouthChip and supports adaptive turn-on detection and fast shutdown. It also supports multiple modes, high-side and low-side synchronous rectification. It is compatible with various MOSFETs and the output voltage can be as low as 0V with ultra-low quiescent current. It does not require an auxiliary coil. Model is SC3503.
Here is information about SouthChip SC3503.
The synchronous rectifier MOSFET is from WAYON and adopts PDFN5060-8L package. 100V 6.3mΩ. Model WMB080N10LG2.
These two solid capacitors for output filtering are from APAQ. 220μF 25V, 560μF 25V respectively.
The inductor, filter capacitors, and sockets are on the buck PCB.
The buck inductor, buck master control chip, and MOSFET are on the back.
The buck master control chip of USB-C1 is from iSmartWare. It supports charging of any USB-C and USB-A ports and dual-port independent current limiting. Model SW3516P.
It integrates a 5A high-efficiency synchronous buck converter. It supports PPS, PD, QC, AFC, FCP, SCP, PE, SFCP, and other fast-charging protocols. It can output up to PD 100W. It also supports CC/CV modes.
Here is all the information about the iSmartWare SW3516P.
The buck MOSFET is from iSmartWare. Model is SWT40N45.
The inductor is wound with magnet wires.
These two solid capacitors are used for input filtering. 150μF 25V for each.
The other two solid capacitors are used for output filtering. 220μF 25V for each.
The VBUS MOSFET used for USB-C1 is marked with B3006.
The dual-port buck master control chip of USB-C2 and USB-A is from iSmartWare. It integrates the 5A high-efficiency synchronous buck converter and buck MOSFET. It supports PPS, PD, QC, AFC, FCP, SCP, PE, SFCP, and other fast-charging protocols. It also supports CC/CV modes. Model is SW3537.
Here is all the information about the iSmartWare SW3537.
The buck inductor is insulated by heat-shrinkable tubing.
The dual VBUS MOSFET used for USB-C2 and USB-A is from NCE and adopts PDFN3.3 x 3.3-8L package. 30V 11mΩ. Model is NCE30ND35Q.
The MCU is used for output distribution and lighting control.
The USB-C sockets have black plastic sheets.
The purple USB-A socket has widened pins for high current fast-changing.
Well, those are all components of this charger.
Summary of ChargerLAB
The UGREEN 65W 3-in-1 Nexode RG GaN Charger can let you check the output modes through three expressions. And the detachable "shoe covers" make the charger more stable when not in use, they can also protect the AC plugs.
After taking it apart, we found its PCBA module is composed of three small PCBs. It adopts one GaN IC, one synchronous rectifier controller from SouthChip, and two buck master control chips from iSmartWare. Its internal components are arranged compactly to save space. It stands out with its exceptional charm and it also has a charging power of 65W in such a small size. If you are attracted by its appearance and performance, then you might as well give it a try.
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