Preface
Ultra-thin fast charging, excellent form and lightweight portability, has always been a very popular type of product in the current market. Recently, the well-known 3C accessories brand Greenlink has launched a Greenlink 65W ultra-thin gallium nitride charger, which is not only equipped with the mainstream 2C1A interface in the case of ultra-thin body, but also the overall appearance is also very good-looking, full of business style. The following charging head network will disassemble this new product in detail, and let's take a look at how it is done.
Greenlink 65W ultra-thin gallium nitride charger unboxing
The front of the box is printed with the UGREEN brand, product name, appearance and a series of selling points, and the lower right corner is also designed with the words 65W of hot stamping, which is very high-grade as a whole.
The chip circuit diagram is printed at the bottom, which is full of science and technology, and there are also product selling points and business information.
The side is printed with product parameter information, etc.
Close-up of the packaging box parameters, the following will be introduced to the physical display of the product.
The package contains the charger, instruction manual and warranty card.
The charger is made of PC fireproof plastic shell, the main body is gray color matching, and the output shell is black contrast treatment, and the overall texture is full.
机身顶面分别印有UGREEN品牌和65W Nexode Pro。
The bottom shell is printed with charger parameter information.
Close-up of charger parameters
Model: X753
输入：100-240V~50/60Hz 1.8A Max
Output:
USB-C1:5V3A、9V3A、12V3A、15V3A、20V3.25A 65W Max
USB-C2：5V3A、9V3A、12V2.5A 30W Max
USB-A:5V3A、9V2A、12V1.5A、10V2.25A 22.5W Max
输出总功率:65W Max
Manufacturer: Shenzhen Greenlink Technology Co., Ltd
The product has passed CCC certification.
The charger is equipped with foldable GB prongs.
The output end of the fuselage is equipped with 2C1A interface, and the end shell is concave design, which makes the cable connection more stable and pays attention to details.
The measured length of the charger body is 84.73mm.
The width is 48.86mm.
The thickness is 14.7mm.
Compared with Apple's 61W charger, the size advantage is obvious.
Feel the size of the charger in your hand.
In addition, the weight of the charger was measured to be about 118g.
使用ChargerLAB POWER-Z KM003C测得USB-C1口支持UFCS、QC3+/4+、SFCP、PD3.0、PPS、DCP、SAM 2A、Apple 2.4A充电协议。
PDO报文显示USB-C1口还具备5V3A、9V3A、12V3A、15V3A、20V3.25A五组固定电压档位,以及3.3-11V4.5A一组PPS电压档位。
测得UFCS融合快充具备3.4-5.5V3A、5.5-11V3A两组电压档位。
测得USB-C2口支持FCP、SCP、AFC、QC3.0/4+、SFCP、PD3.0、PPS、DCP、SAM 2A、Apple 2.4A充电协议。
PDO报文显示USB-C2口还具备5V3A、9V3A、12V2.5A三组固定电压档位,以及3.3-11V2.75A一组PPS电压档位。
测得USB-A口支持FCP、SCP、AFC、QC3.0、SFCP、DCP、SAM 2A、Apple 2.4A充电协议。
Greenlink 65W ultra-thin gallium nitride charger disassembly
The bottom shell is disassembled, the heat sink is pasted on the shell, and the insulation treatment is made, and the pins are fixed with a transparent small plate.
Take out the PCBA module, and there is also a heat sink in the housing slot to help dissipate heat.
The front and back of the PCBA module are filled with blue thermal conductive adhesive, and the heat dissipation measures of the product are quite good.
The thermal conductive adhesive on the PCB board is cleaned, and the capacitors, transformers and other devices are sunk to the plate, which can effectively reduce the thickness.
The front of the motherboard is equipped with a chip fuse, rectifier bridge, main control chip, synchronous rectifier tube and other devices, and the main control chip is covered with copper foil for thermal conduction.
On the other side, there are devices such as common mode inductors, safety X capacitors, filter capacitors, planar transformers and high-voltage filter electrolytic capacitors.
Close-up of SMD fuse with rated current of 3.15A.
贴片型热敏电阻来自精勤，型号SMD-NTC2R5M4A。
The thermal protector is from Hakway, model HKW9700.
HKW9700 temperature switch, the design application here is to use the characteristics of the device, when the power supply is a cold machine, the NTC thermistor can effectively suppress the inrush current when the power supply is turned on, when the power supply is working normally, the temperature switch detects the NTC thermistor heating, and shorts the switch and close, thus optimizing the series loss of the NTC thermistor.
This design is quite ingenious, making full use of the combination of components, which not only suppresses the inrush current during the chiller, but also improves the conversion efficiency of the power supply, and can also reduce the temperature rise of the power supply.
Common-mode inductors are double-wirewound for EMI filtering.
Close-up of safety X capacitor, 0.1μF capacitance.
The rectifier bridge is from NH New Airlines, the model is RSBL8010, it is a fast recovery rectifier bridge, the specification is 8A 1000V, and it is in SBL package.
The high-voltage filter electrolytic capacitor is from Accon and is specified at 400V 47μF.
Another capacitor is wound with insulating tape.
Tear off the tape, the capacitor is also from Acon, and the specification is also 400V 47μF.
Close-up of 680 filter inductor.
The power supply capacitor of the main control chip is from Dongjia, and the specification is 35V22μF.
The main control chip is covered with copper foil for thermal conductivity and insulated.
The main control chip adopts Xinpeng PN8783, which is a QR-Lock primary controller dedicated to high-performance fast-charging switching power supply, with built-in high-performance 700V GaN FET and up to 500kHz operating frequency, which can effectively reduce the volume of transformer and output capacitor. At the same time, it has a built-in 800V high-voltage starting tube, with a standby power consumption of less than 55mW and a typical conversion efficiency of more than 93%, which can significantly improve the power density of the charger.
PN8783 integrates the internal current mode controller, adopts the unique multi-mode modulation technology and special device low-power structure technology, and adaptively switches OR-Lock Mode, PFM and Burst Mode according to the input voltage, output voltage and load, which realizes high efficiency and low standby power consumption in the full load range, avoids the switching converter from entering CCM mode operation, and reduces the voltage stress of the secondary rectifier tube.
PN8783 adopts QFN6X8 packaging process, with a highly stable loop and a higher degree of adaptability for import replacement, which is suitable for mobile phone chargers, charging adapters and other fields.
Close-up of planar transformer.
EL 1019 optocoupler for output voltage feedback.
SMD Y capacitors come from Sichuan Teruixiang Technology Co., Ltd., which have the characteristics of small size and light weight, which are very suitable for high-density power products such as gallium nitride fast charging. The part number is TMY1471K.
Teruixiang focuses on the research and development, production and sales of passive components, with a registered capital of 100 million yuan. It has two categories of independent capacitor brands: SMD TRX and DIP TY capacitors, TRX will be committed to the research of ceramic materials, in order to expand more categories of applications, to provide customers with more solutions.
The charging head network learned that in addition to being used by dozens of high-power chargers such as Baseus Qualcomm QC5 certified 100W gallium nitride fast charging, Maiduoduo 100W gallium nitride, OPPO 65W super flash charging gallium nitride charger, Lenovo 90W gallium nitride fast charging, Nubia 65W gallium nitride charger, Baseus 120W gallium nitride + silicon carbide PD fast charging charger, etc., can also be applied to 20W mini fast charging of brands such as Hailutong, First Guard, Belkin, etc., and the performance has been unanimously recognized by customers.
Silkscreen GMLGJA synchronous rectifier controller close-up.
The synchronous rectifier is from Weizhao Semiconductor, model VS1605APM, NMOS, withstand voltage 100V, conduction resistance 6.3mΩ, and adopts PDFN5*6 package.
Weizhao Semiconductor VS1605APM Profile Information.
Two output filter capacitors are from Emerald, one is 25V 470μF.
The other is 25V 330μF.
The USB-C1 interface of the charger uses a smart SW3566H buck controller, which is a highly integrated multi-fast charging protocol dual-port charging SOC chip, which supports USB-C and USB-A interface charging, and supports dual-port independent current limiting. The chip integrates a high-efficiency synchronous step-down converter, supports 20V7A and 28V5A output, supports PD3.1/QC/SCP/UFCS and other fast charging protocols, supports fast charging protocol customization, and supports a maximum output power of 140W.
SW3566H integrates CC/CV mode, dual-port management logic and bus voltage detection, and can achieve dual-port step-down output with corresponding step-down switch and VBUS switch. The built-in buck converter on the chip operates at a frequency of 180KHz and supports PWM and PFM modes. The output current, line loss compensation and other protection thresholds can be set through the I2C interface, and the built-in ADC can realize data sampling of 9 channels such as input and output voltage, output current, chip temperature, etc., and support external MCU for parameter display.
SW3566H supports 36V input voltage, up to 7A output current, built-in soft start, input over/under voltage protection, output over/under voltage protection, output overcurrent/short circuit protection, DP/DM/CC overvoltage protection, chip overtemperature protection and external NTC thermistor protection, and power limit protection. The chip is packaged in QFN4*4-32.
According to the dismantling of the charging head network, Zhirong SW3566H has also been used by Anker 65W 2C1A gallium nitride charger, Bull 240W 3C1A gallium nitride desktop charger, Greenlink 300W 4C1A five-port PD gallium nitride fast charging charger, Jinxiang 140W 3C1A gallium nitride fast charging charger, Gushi 188W multi-port desktop charger, TOMAX 140W 3C1A gallium nitride charger and other products, and the chip performance quality has been unanimously recognized by customers.
The step-down chip for USB-C2 and USB-A ports adopts Zhirong Technology SW3537, which integrates a 5A high-efficiency synchronous rectification step-down converter inside the chip, supports PPS, PD, QC, AFC, FCP, SCP, PE, SFCP, low-voltage direct charging and other charging protocols, supports CC/CV mode, and only requires a small number of external components to form a complete high-performance multi-fast charging protocol dual-port charging solution.
Thanks to the high integration of the chip, SW3537 integrates the protocol chip, synchronous buck controller and buck MOS transistor in the traditional step-down scheme into one package, which greatly simplifies the circuit design of multi-port fast charging, and the chip supports A+C dual-port fast charging applications with perfect protection functions.
Zhirong Technology SW3537 information.
Two MOS transistors are used for synchronous step-down, Ruijun Semiconductor RUH4040, NMOS, withstand voltage 40V, conduction resistance 8mΩ, in PDFN3333 package.
Close-up of two 4R7 alloy inductors used for two bucks.
The step-down output filtered solid-state capacitor is also from Emerald and is specified at 25V 150μF.
The other circuit uses solid-state capacitors of the same specification.
USB-C1口输出VBUS开关管采用锐骏RU3040，NMOS，耐压30V。
The VBUS switch for USB-C2 and USB-A interfaces is from Weizhao Semiconductor, model VS3622DE, dual NMOS, withstand voltage 30V, conduction resistance 10mΩ, support 5V logic voltage drive, and come in a PDFN3333 package.
Weizhao Semiconductor VS3622DE Details.
Close-up of USB-C receptacle.
Close-up of USB-A receptacle, soldering of sinking plate vias.
A list of all dismantling and a family photo.
Summary of the dismantling of the charging head network
Finally, a list of core components of Greenlink's new three-port gallium nitride ultra-thin fast charger is attached for your convenience.
Greenlink's new three-port gallium nitride ultra-thin fast charger continues the same design language of the brand's fast charging series, with a delicate business appearance and biscuit shape, which is not only small and portable, but also very durable. The charger is equipped with a 2C1A interface, which is not only compatible with multiple mainstream fast charging protocols such as UFCS, FCP, SCP, AFC, QC3.0/4+, SFCP, PD3.0, PPS, etc., but also supports 65W PD fast charging and Huawei 22.5W super fast charging, meeting the fast charging needs of users of big brands such as Apple and Huawei.
Through the dismantling of the charging head network, it was learned that the charger adopts the Xinpeng micro PN8783 encapsulated gallium nitride power supply scheme, and the output uses Zhirong SW3566H and SW3537 to control the output voltage of three ports, and the power device is also from the well-known manufacturer Weizhao Semiconductor in the industry. The emerald capacitor is used for filtering output, and the PCBA module is filled with thermal conductive glue, and equipped with a heat sink for thermal conduction, and the heat dissipation measures are in place, which can ensure the long-term high-power fast charging needs of the equipment.