Teardown report: UGREEN 65W 2C1A gallium nitride charger CD244
Preface
Lulian has launched a 65W gallium nitride fast charging charger. This charger adopts a long body design and is equipped with folding prongs, making it compact and portable. The charger has a 2C1A interface, both USB-C1 and USB-C2 interfaces support 65W PD fast charging, and the USB-A interface supports 22.5W high-current fast charging, meeting the fast charging needs of mainstream Android phones.
This charger supports automatic power distribution and can charge three devices at the same time, which is very practical. It is also equipped with intelligent temperature control technology, making it more secure to use. Below, Charging Head Network will take a look at the disassembly of this gallium nitride charger from Lulian and take a look at the internal solutions and materials.
Greenlink 65W GaN charger unboxing
The UGREEN brand, charger name, appearance and selling points are printed on the front of the box . It uses gallium nitride technology and intelligent temperature control technology, which can quickly charge mobile phones, tablets, laptops and other devices. It can charge a MacBook Air in 60 minutes. 13 Charge 70%.
Product parameter information is printed on the side. The charger supports 100-240V global wide voltage input and can be used in most countries and regions around the world with a suitable converter. The two configured USB-C ports support 65W output power under the PD3.0 fast charging standard, and have a set of 3A PPS fast charging. The performance is exactly the same and can be used for blind plugging. The USB-A port supports Huawei’s classic 22.5W SCP fast charging and 18W QC fast charging. The product has also passed CCC certification and its quality is guaranteed.
The packaging box has a top-to-bottom cover design, with product selling point descriptions and business information printed on the bottom.
The package includes a charger and user manual.
Although the body of this 65W gallium nitride charger from Lulian has a classic columnar shape, from the style point of view, it looks more like the waist is stretched to both sides, which is very unique. In terms of appearance design, the front and back shells are spray-painted with silver-gray paint and decorated with high-gloss glossy frames. The overall look is very business-like.
The UGREEN brand is printed on the front of the fuselage.
The words 65W are printed on the lower right corner of the back.
The charger is equipped with foldable national standard prongs, and the input end shell is carefully designed with a straight section, which can fit well into the socket and make it more stable when plugged into the wall plug.
The output end is equipped with three interfaces, 2C1A. Not only are the names printed next to the interfaces, there are also laptop and mobile phone logos printed above the USB-C1 port, indicating that the charger can fast charge the corresponding devices.
The actual measured length of this charger is 67.37mm.
Width is 30.98mm.
Thickness is 40.34mm.
Compared with Apple’s 61W charger, the size advantage is obvious.
The size of the charger in your hand is intuitive and the design is very compact and exquisite.
In addition, the net weight of the charger was measured to be approximately 123g.
Using ChargerLAB POWER-Z KM003C, it was measured that the USB-C1 port supports FCP, SCP, AFC, QC3.0/5, SFCP, PD3.0, PPS, DCP, SAM 2A, and Apple 2.4A charging protocols.
It also has five fixed voltage levels of 5V3A, 9V3A, 12V3A, 15V3A, and 20V3.25A, as well as a set of PPS voltage levels of 3.3-21V3A.
It is measured that the output protocol of USB-C2 port is exactly the same as that of C1 port.
The same goes for PDO messages. The output performance of the two USB-C ports is exactly the same. They support blind power insertion and are easy to use.
Finally, it was measured that the USB-A port supports FCP, SCP, AFC, QC3.0, SFCP, DCP, SAM 2A, and Apple 2.4A charging protocols.
Greenlink 65W GaN charger disassembly
After watching the unboxing and testing of Lulian’s 65W gallium nitride charger, let’s disassemble it and take a look at the internal solutions and materials.
First, pry open the side cover of the charger along the seam of the case.
The internal PCBA module is filled with glue.
The folding pins are connected via wire soldering.
Take out the internal PCBA module, and connect the folding pins and the PCBA module through wire welding.
Close-up of the welding place between wires and PCBA module.
The PCBA module is filled with glue to improve the weather resistance, mechanical strength and heat dissipation performance of the charger.
The length of the PCBA module measured using a vernier caliper is approximately 60.8mm.
PCBA module width is approximately 35mm.
PCBA module height is approximately 25mm.
Clean off the potting glue of the PCBA module and start observing the circuit layout. On the right side of the PCBA module is the AC input terminal, where the fuse and rectifier filter board are welded, and the high-voltage filter capacitor is welded on the bottom. On the left is the output buck board, with the buck inductor and USB-C and USB-A female sockets welded, and the transformer in the middle.
A glance at the back of the PCBA module shows the welded gallium nitride main control chip, gallium nitride encapsulated chip, SMD Y capacitor, feedback optocoupler, synchronous rectification controller and synchronous rectifier tube. The primary and secondary boundaries are clear.
Through observation of the PCBA module, it was found that Lulian’s 65W 2C1A gallium nitride charger uses a high-frequency QR switching power supply, synchronous rectification, and constant voltage output. The output uses two independent synchronous buck circuits to achieve three-port fast charging output and intelligent distribution of output power. Let’s start with the input end to understand the design and materials of the entire charger.
Overview of the input terminals of the PCBA module, soldering fuses and rectifier and filter boards.
The input fuse is from Better Electronics, the part number is 936, and the specification is 3.15A 250V.
The two-stage common mode inductor and safety X2 capacitor are soldered to the front of the input board.
The rectifier bridge is welded on the back of the small board.
Common mode inductors are wound with enameled wire and insulated wire.
The safety X2 capacitor comes from Weiqing Electronics, with a specification of 0.33μF.
The other common mode inductor is wound with flat copper tape.
The rectifier bridge is from Shenzhen Wold Industrial Co., Ltd., model WRLSB80M. This soft bridge can reduce the diode junction capacitance to achieve very little harmonic oscillation through a soft recovery curve and smooth turn-off characteristics. The selected LSB package has good heat dissipation characteristics, helping to improve the reliability of medium and large wattage adapters, and a single unit can produce 60W+.
Weld high-voltage filter capacitors and NTC surge suppression resistors on the side of the PCBA module.
The high-voltage filter capacitors are from Fengbin, three of which are 22μF400V.
The specification of the other filter capacitor is 33μF400V, and the total capacity of the filter capacitor is 99μF.
The NTC thermistor is MF72 series, model 3D-7M.
The primary main control chip is from Xinpeng Micro, model PN8213. It is a high-frequency quasi-resonant switching power supply controller. The chip integrates high-voltage startup and supports multi-mode control, achieving high efficiency and low standby power consumption across the full load range. The chip has built-in frequency modulation technology and Soft-Driver technology to improve the EMI performance of the system. It also has a built-in line voltage compensation module to improve the consistency of the load capacity across the entire input voltage range.
PN8213 also has built-in comprehensive protection functions, including cycle-by-cycle overcurrent protection, input voltage protection, output overvoltage protection, dual overheating protection, secondary rectifier short circuit protection, and overload protection. The chip is packaged in SSOP10 and supports PD fast charging and adapter use.
Xipeng Micro PN8213 data information.
The gallium nitride power switch tube adopts Nanomicro NV6125, which has a built-in driver and does not require an external driver. It has a resistance of 175mΩ and a voltage resistance of 650V. It supports a switching frequency of 2MHz and uses a QFN6*8mm package with enhanced heat dissipation. It is suitable for boosting and bucking. Half-bridge, full-bridge switching power supply and many other applications.
NanoVis NV6125 data information.
Charging Head Network learned that OPPO’s new 65W super flash charging gallium nitride charger , Lenovo thinkplus 65W gallium nitride lipstick power supply Pro , Lenovo 90W flash charging dual-port gallium nitride charger, and thinkplus 65W gallium nitride are using this chip. Fast charging , Hongdashun 65W 2C1A gallium nitride fast charging and other products.
Three 620mΩ sampling resistors are connected in parallel to detect the primary switch current.
Solder the transformer on the side of the PCBA module.
The transformer core is tightly wrapped with tape insulation.
SMD Y capacitors are from Sichuan Teruixiang Technology Co., Ltd. They are small in size and light in weight. They are very suitable for use in high-density power products such as gallium nitride fast charging. The material numbers are TMY1102M and TMY1471K respectively.
Teruixiang focuses on the R&D, production and sales of passive components, with a registered capital of 100 million yuan. It has two types of independent capacitor brands: SMD TRX and DIP TY capacitors. TRX will be committed to the research of ceramic materials to expand more categories of applications and provide customers with more solutions.
Charging Head Network learned that Teruixiang SMD Y capacitors are used by Maiduoduo 100W gallium nitride , OPPO 65W super flash gallium nitride charger , Lenovo 90W gallium nitride fast charge , and Nubia 65W gallium nitride charger. , Baseus 120W gallium nitride + silicon carbide PD fast charging charger and other dozens of high-power chargers, it can also be used in 20W mini fast charging from brands such as Hailutong , First Guardian , Belkin , etc., and its performance has been unanimously recognized by customers . recognized .
Between the two chip Y capacitors is a feedback optocoupler, from Everlight, model EL1018.
The synchronous rectification controller is silk-printed IBHJN, the actual model is MP6908A, from MPS Core Source Semiconductor, the maximum operating frequency is 600KHz. Supports multiple working modes of DCM, CCM, QR, and ACF, supports high-side and low-side applications, and has ringing detection to prevent accidental activation.
The synchronous rectifier is from Weir, model WNM4014, NMOS, withstand voltage 100V, conductance resistance 7mΩ, and adopts PDFN5*6-8L package.
The filter capacitor is from Emerald, a CA series solid capacitor with a specification of 220μF 25V and is insulated by a heat shrink tube.
Weld the filter capacitor, buck board and filter inductor on the output side.
The other output filter capacitor is also from Emerald. It is a BC series solid capacitor with a specification of 560μF 25V.
The filter inductor jacket is insulated with heat shrink tubing.
The internal coil is wound with enameled wire.
Two USB-C female sockets and one USB-A female socket are welded on the front of the small voltage-reducing board. A voltage-reducing chip, a voltage-reducing switch tube, and an MCU for automatic power control are also welded.
Weld two step-down inductors and two filter capacitors on the back of the small board. The step-down inductors and filter capacitors are insulated by heat shrink tubes.
The main control chips of the two voltage-reducing circuits both use Zhirong SW3516H, which is used for voltage-reducing control and protocol identification. Zhirong SW3516H is a highly integrated multi-fast charging protocol dual-port charging chip that supports fast charging output from any port of A+C port and supports independent current limiting for dual ports.
SW3516H integrates a 5A high-efficiency synchronous buck converter. Supports multiple fast charging protocols such as PPS/PD/QC/AFC/FCP/SCP/PE/SFCP, maximum output PD 100W, CC/CV mode, and dual-port management logic. Only a small number of peripheral components are needed to form a complete high-performance multi-fast charging protocol dual-port charging solution.
Through disassembly, the charging head network found that SW3516H has also been used by ASUS 65W 2C1A gallium nitride charger , Nubia 65W Deuterium Front three-port gallium nitride fast charger , Rapoo 65W GaN fast charger , and Greenlink 65W 4C port gallium nitride fast charger. It is used in many products such as charger , Lenovo 90W flash charging dual-port gallium nitride charger , Hongdashun 120W four-port 2C2A fast charging, etc. In addition, Zhirong’s fast charging chip can also be used in USB PD fast charging mobile power supply, fast charging Car charging and other fields .
A close-up of another Zhirong SW3516H chip.
Two Hener CWR03N041AP are used for synchronous rectification and buck, NMOS, withstand voltage 30V, conduction resistance 4.1mΩ, and are packaged in PDFN3030.
Close-up of two buck inductors, which are insulated with plastic skin from the PCB.
The output filter capacitor is from Emerald, with a specification of 220μF 25V, and is insulated by a heat shrink tube.
The other filter capacitor has the same specifications.
Ruijun Semiconductor RU30D20M3 is used for USB-C and USB-A port output control. It has dual NMOS, withstand voltage of 30V, conductance resistance of 8.5mΩ, and is packaged in DFN3030.
Two 5mΩ sampling resistors are used to detect the output current of the USB-C and USB-A interfaces.
The USB-C female socket is fixed by through-hole welding, and the black rubber core does not expose copper.
The USB-A female socket uses a purple rubber core and has an auxiliary contact on the front end.
The MCU used for automatic output power distribution comes from Huimang Micro, silk screen D3HKOKE.
The voltage regulator chip that powers the MCU comes from Weimeng and is screen-printed LEWF.
ake a look at all the disassembly and take a family photo.
Summary of disassembly of charging head network
Lulian’s 65W gallium nitride charger adopts a long columnar design and is equipped with folding prongs, making it compact and portable. The charger is equipped with two USB-C interfaces and one USB-A interface. Two of the USB-C ports support 65W fast charging, which is suitable for charging laptops and mobile phones. The USB-A port supports 22.5W fast charging and supports automatic power distribution, which is very practical.
Charging Head Network learned from the disassembly that this charger of Lulian uses a potting process, which is reliable and durable. Built-in Xinpeng Micro PN8213 main control chip, the chip supports high-voltage startup and has comprehensive functions, realizing the domestic replacement of core components. The output voltage reduction uses two Zhirong SW3516H chips to realize the voltage reduction output of three interfaces. The high-voltage capacitor inside the charger comes from Fengbin, and the solid capacitor comes from emerald. The overall materials are reliable and the workmanship is solid.
