Recently, the charging head network got a nubia Nubia white 20W double-port gallium nitride charger, compared with dozens of previously dismantled 20W class fast charging products, the biggest difference of this charger is the use of gallium nitride technology, in this proportion is indeed very rare.
The charging head network learned that this charger uses the Maoruixin high-frequency QR power supply scheme, and the gaN power chip with it is innova SECCO's second-generation new PRODUCT INN650DA04. Let's take a detailed disassembly of this charger to see how it is designed internally.
Previously, the charging head network also disassembled the Nubian White 65W dual-port Gallium Nitride Fast Charger, Nubia 30W Gallium Nitride Fast Charge, Nubia 120W 2C1A Three-Port Gallium Nitride Fast Charge, Nubia 20W PD Fast Charge Charger, Nubia 22.5W Sugar Cube Fast Charger and other products, welcome to check it out.
First, Nubian white 20W gallium nitride fast charging appearance
The charger is packaged in a brown carton with the nubia logo in the upper left corner of the front and the words NEOCHARGE and Power Adapter printed on the bottom.
On the sticker on the back, there is the charger model, name, and brand and manufacturer information.
The package contains a charger and instruction manual.
The charger adopts a white shell of PC flame retardant material, with a bright surface treatment at the waist and height, and a frosted top surface.
The front of the fuselage is printed with the words "Great White".
The word "20W" is printed on the back, indicating the maximum output power of the charger.
The charger is equipped with a fixed GB pin.
Charger parameters are printed on the input housing:
Model: PA0218
Input: 100-240V~50/60HZ 0.5A
USB-C/A输出:5V3A、9V2.23A、12V1.67A
USB-C+USB-A：5V3A
Manufacturer: Shenzhen Kunxing Technology Co., Ltd
Producer: Nubia Technology Limited
The product has passed the 3C certification.
The top surface is equipped with a 1A1C dual output interface, with orange and black cores, respectively.
The measured charger body height was 36.88mm.
The width is 33.04mm.
The thickness is 32.94mm.
Compared with Apple's 20W charger, the volume is smaller.
Intuitive feeling of the charger in your hand.
The net weight is approximately 43g.
The USB-C port is measured using the Chargelab POWER-Z KT002 to support Apple 2.4A, Samsung 5V2A, DCP protocol, as well as QC2.0/3.0, AFC, FCP, SCP, PD3.0, PPS fast charging protocol.
PDO messages show that the C port also has three sets of fixed voltage gears of 5V3A, 9V2.23A, 12V1.67A, and two sets of PPS voltage levels of 3.3-5.9V3A and 3.3-11V2A.
In addition, the USB-A port supports QC2.0/3.0, AFC, FCP, and SCP fast charging protocols.
Second, Nubian white 20W gallium nitride fast charging and dismantling
Remove the PCBA module from the housing and crimp the metal shrapnel.
The measured module length was 32.43mm.
The width is 28.01mm.
The thickness is 27.49mm.
The module consists of two small plates, two female seats welded to the vertical platelet, and an insulated isolation plate on the back.
Through observation, it was found that this charger uses a high-frequency QR power supply architecture, and a protocol chip controls the 1A1C dual-port output voltage. Let's start with the inputs to understand the information of each device.
At a glance, the inputs are equipped with safety resistors, high voltage filter electrolytic capacitors, and transformers.
The back of the board features a fairing bridge, gallium nitride power chip, optocoupler, and chip Y capacitor.
Close-up of the safety resistor.
WRABS20MG, high surge soft bridge, from Shenzhen Wald Industrial Co., Ltd., this soft bridge has higher surge characteristics and softer recovery curve, relatively smooth shutdown characteristics, can reduce the diode junction capacitance to achieve very little harmonic oscillation produced effect.
Wald WRABS20MG rectifier bridge data information.
Charging head network disassembly learned that Wold's soft bridge is also used by Momix 100W 2A2C gallium nitride fast charger, Nubia 1A1C 45W deuterium gallium nitride fast charger, bull 65W PD fast charger, Maddodo 2C1A 65W gallium nitride charger, Hongdashun 65W gallium nitride charger, OPPO 50W biscuit gallium nitride fast charge, ROCK 65W gallium nitride charger and other fast charging products, product performance has been unanimously recognized by customers.
Two high voltage filter electrolytic capacitors are from Acon neutrons, both 400V 18μF.
I-beam inductive jacket insulated tube.
Remove the vertical small board, you can see that there is a switching power supply main control chip on the front of another small board.
The switching power supply main control chip adopts The MK2697A, which is a QR PWM controller optimized for PD/fast charging applications. Its wide VCC operating voltage range (9V-90V) allows it to cover the PD/PPS output range from 3.3V-23V without the need for additional windings or linear buck circuitry.
The MK2697 is designed for efficiency requirements and features an adaptive multi-mode due to the fact that PD/Fast Charge has multiple different output voltages. It is adjusted to work at DCM/QR at different loads and outputs. At light loads, it will operate in burst mode to improve efficiency.
The MK2697A provides comprehensive protection functions with output OVP, OPP, VCC OVP, BROWN-IN/OUT, secondary side SR short circuit protection, PIN pin OPEN/SHORT protection, etc.
The dismantling of the charging head network learned that the use of Maoruixin AC-DC fast charging scheme is also UOCO. 65W 2C1A Gallium Nitride Fast Charge, Gushi Technology 30W 1A1C Dual-Port Fast Charge, Beth 65W GaN3 Pro Gallium Nitride Charger, Huakesheng Mini 33W Fast Charge, Beth 20W 1A1C Fast Charge Charger, Aisha Watt 65W 2A1C Gallium Nitride Fast Charge, Air-J 18W 1A1C Fast Charge Charger and other products are adopted.
Gallium nitride power chip using Innoseco INN650DA04, withstand voltage 650V, conductivity 480mΩ (max), with high frequency and high efficiency, very low loss, fast active heat dissipation and other characteristics, while using DFN5 * 6 package, to achieve small size, high efficiency charger design.
Infonotic INN650DA04.
INN650DA04 is the second generation of innoGaN series of new products, has been Gushi Technology mini 30W gallium nitride fast charge, Kexun mini 33W fast charge gallium nitride, REMAX 30W gallium nitride fast charge, Nubia 30W gallium nitride sugar cube fast charge, Ruiyuan Industrial 33W 1A1C gallium nitride fast charge and dozens of other 30W fast charging products, chip quality has been recognized by the market.
Transformer close-up.
EL 1019 optocoupler for primary secondary communication, feedback regulation of the output voltage.
The CHIP Y capacitor comes from Sichuan Terry Xiang Technology Co., Ltd., which has the characteristics of small size and light weight, which is very suitable for high-density power products such as gallium nitride fast charging.
Terry Xiang focuses on the research and development, production and sales of passive components, with a registered capital of 100 million yuan. There are two types of independent capacitor brands: SMD TRX and DIP TY capacitors, TRX will be committed to the research of ceramic materials, in order to expand the application of more categories, to provide customers with more solutions.
The charging head network learned that in addition to being used by dozens of fast charging products of Brands such as Belkin, Anker, QCY, Shengli, Maddo, OPPO, Lenovo, Nubia, Beth, Hailutong, First Guard, etc., in addition to being used by Igor 40W LED drive power supply, Changhong 42-inch intelligent network TV 42P3F built-in power supply, Zhuo Feihang 45W Gallium nitride ultra-fast wall charging and other products, the performance has been unanimously recognized by customers.
The front of the vertical small board is equipped with two solid capacitors, synchronous rectifier chips, protocol chips and output VBUS switch tubes.
There is also a C-port output VBUS switch on the back of the board.
Close-up of synchronous rectifier chip, silk screen printing MK91738.
Two output filtered solid capacitors are from Emerald and are both 25V 220μF.
The protocol chip adopts Ingen core IP2726 for output voltage control of 1A1C interface. IP2726 is a fast charging IC that integrates multiple protocols for USB output ports, supporting Type-C DFP, PD2.0/3.0, PPS, QC4+, QC2.0/3.0, FCP, AFC, SCP, MTK PE+, Apple 2.4A, BC1.2 and Samsung 2A. With high integration and rich functions, it requires very few peripheral devices in the application, effectively reducing the size of the overall solution and reducing the BOM cost.
The charging head network learned that the Inji core IP2726 has passed the Qualcomm QC4+ certification and obtained the first QC4+ certification certificate Chinese mainland.
Charging head network learned that Yingjixin IP2726 has previously been adopted by AUKEY 65W 1A1C Gallium Nitride Fast Charge Charger, RAVPOWER 90W Dual USB-C Port PD Fast Charge Charger, Stec 100W Dual USB-C Port Gallium Nitride Charger, Maddor 30W 1A1C USB PD Fast Charge Charger, Kunxing 18W USB PD3.0 PPS Fast Charge Charger and other products. In addition, other series of fast charging chips of Yingjixin have also been highly recognized by customers such as Xiaomi, Huawei, and Samsung.
The A-port output VBUS switch is available in AGMMsemi AGM405AP1, withstand voltage 40V, conductivity 5.7mΩ, DFN3.3*3.3 package.
The C-port output VBUS switch is also using the AGM405AP1.
USB-A mother seat close-up.
USB-C female close-up.
All disassembled, let's take a family portrait.
Charging head net disassembly summary
Nubia this 20W charger using gallium nitride technology, in the same power level products or quite rare, the positioning of the natural charger is a mini charge, and equipped with 1A1C dual output interface, compatible with QC, AFC, FCP, SCP, PD3.0, PPS fast charging protocol, to meet the needs of Apple, Samsung, Millet and other brands of mobile phone fast charging.
Through disassembly, the charger module adopts two small board designs, adopts The MK2697A+MK91738 high-frequency QR switching power supply scheme, with innoseco INN650DA04 gallium nitride power device, and the Inji core IP2726 protocol chip controls the dual output voltage. The intermediate element and emerald capacitors are filtered for input and output, and the overall material workmanship is solid and reliable.