Preface
The charging head network got a 30W gallium nitride charger from JD.com's No. 1 member store, which uses a white body and fixes the national standard pins. The brand logo and power output are printed on the side of the fuselage, which is highly recognizable. The charger supports a wide voltage input of 100-240Vac, with an output power of 30W, with a 20V output range, and two sets of PPS voltage ranges of 5-11V3A and 5-16V2A. Let's bring the dismantling of this gallium nitride charger in the No. 1 member store, and take a look at the internal scheme and workmanship.
One's Menber 30W GaN Charger Unboxing
The front of the box is printed with the One's Menber brand, the appearance and name of the charger, and the Type-C port logo.
On the back is printed information such as product specifications and packaging lists.
Close-up of the parameters on the packaging box, and then introduce it to the physical display of the charger.
The charger and instruction manual are included in the package.
The One's Menber 30W GaN charger has a regular white case design with a cube-like shape that is very small.
机身一侧印有One's Menber品牌。
另一侧印有30W GaN字样。
The input housing is printed with the charger parameters
型号：OM-PD30L01
输入:100-240V~50/60Hz 1A
输出:5v3a、9v3a、15v2a、20v1.5a(30v max)
Manufacturer: Huizhou Hehong Technology Co., Ltd
The charger is CCC certified.
The charger is equipped with fixed GB prongs.
The top is equipped with a single USB-C port, which is arranged on one side.
The measured height of this charger is 32.52mm.
The width is 31.19mm.
The thickness is 31.15mm.
Compared with Apple's 30W charger, One's Menber's 30W mini gallium nitride charger has obvious advantages in size.
Feel the size of the charger in your hand.
In addition, the weight of the charger was measured to be about 46g.
The USB-C port supports QC3.0/4+, PD3.0, PPS, DCP, and Apple 2.4A charging protocols as measured by the ChargerLAB POWER-Z KM003C.
The PDO packet shows that the USB-C port also has four sets of fixed voltage ranges of 5V3A, 9V3A, 15V2A, and 20V1.5A, and two sets of PPS voltage ranges of 5-11V3A and 5-16V2A.
One's Menber 30W GaN Charger Teardown
After reading the unboxing and testing of this 30W gallium nitride charger in the No. 1 member store, let's disassemble it and take a look at the internal scheme and workmanship.
First, the shell is disassembled along the seam of the housing, and the fixed prongs are connected to the PCBA module through the shrapnel for power supply.
Close-up of shrapnel inside the case.
The PCBA module is fixed by slotting in the housing.
The PCBA module is taken out from the inside of the shell and composed of multiple small plates welded.
The length of the PCBA module is about 29.3mm measured by vernier calipers.
The width of the PCBA module is about 26.8mm.
The thickness of the PCBA module is about 25.9mm.
The PCBA module consists of three small boards soldered.
Close-up of the graphene heat dissipation material inside the charger to enhance thermal conductivity and heat dissipation.
Solder chip fuses and rectifier bridges on the input PCB.
The top switching power supply board is welded with a gallium nitride encapsulated chip, and a graphene heat sink is pasted.
The bottom board is soldered with SMD Y capacitors, feedback optocouplers, synchronous rectifier chips, protocol chips and USB-C receptacles.
High-voltage filter capacitors and transformers are welded inside the space enclosed by the PCB.
The output filtered solid-state capacitors are insulated using a white plastic frame.
The PCBA module is soldered into each small board, in which the rectifier bridge, gallium nitride encapsulated chip and synchronous rectifier chip are soldered on the three PCBs respectively, which effectively evenly distributes the heat and reduces the temperature rise.
Through the observation of the PCBA module, it is found that the 30W GaN charger in the No. 1 member store is a QR switching power supply architecture, synchronous rectification, a wide range of voltage output, the output voltage is fed back by the protocol chip through optocouplers, and the GaN fast charging source scheme comes from Dongke Semiconductor. Let's start with the input to understand the information of each device.
The input side PCB front is soldered with fuses and rectifiers.
The other side is welded with an NTC thermistor and a common-mode inductor.
The input fuse specification is 3.15A250V.
The NTC thermistor model 3D-7 is used to suppress the inrush current when the charger is powered up.
Common mode inductors are wound with silicone and enameled wires and are insulated with heat shrink tubing.
The rectifier bridge is from PY Pingwei, the model is TMBFR310, it is a fast rectifier bridge, and the specification is 3A1000V.
The top switching power supply board is welded with high-voltage filter capacitors, differential mode inductors and transformers.
The back side is soldered with a GaN sealed chip.
The high-voltage filter capacitor is from Aihua and has a specification of 400V 22μF.
The other is 400V15μF.
There is also a specification of 400V 10μF, and the total capacity of the filter capacitor is 47μF.
Differential mode inductor jacket heat shrink tube insulation.
The core component of the charger is from Dongke Semiconductor, model DK036G, which is a quasi-resonant flyback control AC-DC power switch chip with a highly integrated 650V/400mΩ GaN HEMT. The DK036G senses the voltage between the drain and source of the power tube and turns on the power tube when the VDS reaches its lowest value, reducing switching losses and improving electromagnetic interference (EMI).
The DK036G greatly simplifies the design and manufacture of flyback switching power supplies, especially for products that require high conversion efficiency and high power density. DK036G has complete protection functions, including output over-voltage protection, VCC over-under-voltage protection, over-temperature protection, open-loop protection, output over-current protection, etc.
The DK036G GaN encapsulated chip supports 250KHz switching frequency, standby power consumption is less than 50mW, built-in high and low voltage input power compensation circuit, built-in high voltage start, and adopts PDFN5*6 package, which is suitable for GaN fast charging, power adapter and auxiliary power supply applications.
Dongke Semiconductor DK036G data information.
According to the dismantling of the charging head network, Dongke GaN encapsulated chips have also been used in Lenovo Xiaoxin 65W GaN charger, Jiayu 45W dual C-port GaN charger, Jiayu 35W dual-C-port GaN charger, Huakesheng 65W 2C1A GaN charger and other products, and the quality has been unanimously recognized by customers.
The transformer core is tightly wound with tape insulation.
The bottom plate is soldered with SMD Y capacitors, feedback optocouplers, synchronous rectifier chips and protocol chips.
The other side is welded with a filtered solid state capacitor and a USB-C receptacle.
The two SMD Y capacitors are from Sichuan Teruixiang Technology Co., Ltd., the part number is TBY2222MF, which belongs to the SMD-Y2 series, and uses two in series. With the characteristics of small size and light weight, the chip Y capacitors of Teruixiang are very suitable for high-density power products such as gallium nitride fast charging.
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.
Through the dismantling of the charging head network, it was learned that in addition to being used by Belkin, Anker, QCY, Shengli, Maiduoduo, OPPO, Lenovo, Nubia, Baseus, Hailutong, First Guard and other brands of dozens of fast charging products, in addition, it was also used by Igor 40W LED driver power supply, Changhong 42-inch smart network TV 42P3F built-in power supply, Zhuo Feihang 45W gallium nitride ultra-fast wall charge and other products, and the performance was unanimously recognized by customers.
Everlight EL1019 optocoupler is used for output voltage feedback regulation.
The synchronous rectifier chip comes from Dongke Semiconductor, silkscreen 100R15S, the actual model is DK5V100R15S, it is a synchronous rectifier chip without peripherals, built-in 100V withstand voltage, 15mΩ conductive resistance synchronous rectifier tube, with self-power supply technology, can directly replace Schottky diode, has very low forward voltage drop and extremely low temperature rise, improves the conversion efficiency of power supply, and improves EMI.
Dongke Semiconductor's DK5V100R15S supports CCM/DCM/QR working mode, built-in intelligent detection, no need for synchronization signal, and no external components, suitable for USB PD fast charging, power adapter and LED driver, etc., in SM-7 package.
Dongke Semiconductor DK5V100R15S Profile Information.
The output filter capacitor comes from Yangzhou Shengyang Electronics, with a specification of 330μF25V, and two in parallel.
The USB-C protocol chip from Hynetek, model HUSB380, has the advantages of high integration, high performance, small size, supports USB PD3.1, has 5 FPDOs and 2 APDOs, and can be configured with additional 7 power levels through PS0 and PS1 pins. The chip integrates low conductance NMOS, integrated over-voltage protection, under-voltage protection, under-voltage lockout, over-current protection, fast over-current protection and over-thermal shutdown protection, and adopts QFN4*4-32L package, which is suitable for chargers and car charger applications.
The USB-C receptacle is fixed by sinking plate welding, and the orange tongue is clamped with steel sheets.
A list of all dismantling and a family photo.
Summary of the dismantling of the charging head network
The 30W GaN charger at Member 1 has a white body with fixed GB pins. The charger is a single USB-C port and supports 30W output power. The measured charger supports 20V output voltage range, and also has two sets of PPS voltage ranges of 5-11V3A and 5-16V2A. It can meet the charging needs of Apple mobile phones and laptops, and also supports fast charging of Android phones such as Huawei and Samsung, and the overall compatibility is good.
Through the dismantling of the charging head network, it was learned that this gallium nitride charger has a built-in Dongke gallium nitride fast charging source scheme, using Dongke DK036G gallium nitride encapsulated chip with DK5V100R15S synchronous rectifier chip. The output adopts Hynetek HUSB380 protocol chip, and the fast charging protocol supports comprehensively. The PCBA module is composed of three small plates welded, with isolation plate insulation between the components, and glued and reinforced, with compact internal structure and reliable workmanship.