Previously, the charging head network dismantled a SATECHI 100W 2C1A gallium nitride fast charge, the product positioning is a high-power desktop charge, suitable for home, office and other fixed places to use. Recently, we got a 100W gallium nitride fast charger of the brand, but the style, interface configuration and performance have changed a lot compared to the previous one.
This charger is equipped with 3 USB-C ports, compatible with a number of mainstream fast charging protocols on the market, C1 and C2 ports support up to 100W fast charging, C3 ports support 60W fast charging, and the total output power of the three ports is 108W, and the overall performance is very good. In addition, it is very convenient to carry with folding feet and is suitable for a wider range of groups. Let's take a look at how the materials for this charger work.
First, SATECHI 108W gallium nitride fast charging appearance
The front of the box is printed with the SITCHI brand, charger exterior and name.
The package contains a charger and user manual.
The charger shell is composed of two parts, gray shell matte, black shell edge highlight bright design, the overall look is full of business atmosphere.
The front of the fuselage is printed with the SITCHI brand logo.
The charger is equipped with folding AMERICAN plugs, which is portable and will not scratch other devices while being placed in the bag.
Charger parameters are printed on the input housing.
Model: ST-3C108WCM
Input: 100-240V~50/60Hz
Output: 5V3A, 9V3A, 12V3A, 15V3A, 20V5A (100W Max)
The charger is TUV, PSE, FCC, CE and RoHS certified.
The other end is equipped with 3 USB-C ports and a hidden indicator, and the 108W GaN logo is printed on the bottom, indicating that this is a Gallium Nitride charger with a total output of 108W.
The measured body length is 90.87mm.
The height is 48.14mm.
The thickness is 32.99mm.
Compared with apple 96W charger.
Intuitive feeling in the hand.
The weight is about 196g.
When the power is plugged in, the LEDs are white.
The USB-C1 port measured using the ChargeLAB POWER-Z KT002 supports Apple 2.4A, Samsung 5V2A, DCP protocol, as well as QC2.0/3.0, AFC, FCP, PE2.0, PD3.0, PPS fast charging protocol.
At the same time, the C1 port has five fixed voltage gears of 5V3A, 9V3A, 12V3A, 15V3A and 20V5A, and a set of PPS voltage gears of 3.3-21V3A.
The compatibility protocol of C2 port and C1 port are measured to be exactly the same.
The PDO message is the same, the maximum output power is also 100W, that is, C1 and C2 ports support power blind plug.
Finally, the C3 port also supports QC2.0/3.0, AFC, FCP, PE2.0, PD3.0, ppS fast charging protocol.
And with 5V3A, 9V3A, 12V3A, 15V3A, 20V3A five sets of fixed voltage gears, as well as 3.3-21V3A a set of PPS voltage gears, the maximum output power of 60W.
Second, SATECHI 108W gallium nitride fast charging and disassembly
Detach the output housing.
The PCBA module is very securely fixed and can only be removed by cutting the gray housing.
The input end is filled with white glue reinforcement and insulation.
The right side of the module is covered with a thermal pad and a metal heat sink plate wrapped in insulating tape. An insulated isolation plate is provided at the rear end of the output board, which is isolated from devices such as the primary side common mode inductor.
The back of the motherboard is attached with a thermal pad, an insulated isolation plate, and a brass heatsink that is soldered and secured.
The measured module length was 84.72mm.
The width is 41.64mm.
The thickness is 27.47mm.
At a glance at the front of the PCB board, there is obvious isolation between the primary and secondary stages, and the input inductance and the output board are glued and reinforced.
The back of the PCB board is listed, and the right side is equipped with llC switching power supply primary controller and MOS tube and other devices.
Through observation, it was found that this charger adopts high-frequency QR switching power supply architecture, three DC-DC synchronous rectified step-down three-port outputs, and intelligent power distribution. Let's start from the input to understand the information of each component.
There is a small board at the input, and there are five high-voltage filter electrolytic capacitors on this side.
Remove the small board and provide a delay fuse, safety X capacitor, common mode inductor, and rectifier bridge.
The delay fuse specification is 5A 250V.
Anzhi X capacitor comes from Chengxi Electronics, has a capacity of 0.47μF, and the solder foot sleeve has an insulated tube.
Common mode inductor two-wire winding.
A close-up of another common-mode inductor, two-stage designed to filter out EMI interference.
Close-up of two UD8KB810 rectifier bridges.
Two high voltage filter electrolytic capacitors from KNSCHA Knoxen are 400V 33μF. Charging head network disassembly learned that Konexa capacitors have also been used by Sicgecs, HYPER JUICE, Anshu Intelligent, Jinxiang, Shang patrol, Philips, ROxANNE and many other brands of products, and the quality has been unanimously recognized by customers.
Two of them are available in the Yu Optoelectronics y.u.g series with a specification of 400V and 47μF.
There is also a large capacitor with a specification of 400V 82μF.
The other end contains the main control chip power supply capacitor, transformer, Y capacitor, and two output filter solid capacitors.
The main control chip power supply capacitor is also from Konexay.
The specification is 50V 10μF.
The switching power supply main control chip is ON ON ON SEMINUM NCP1342, which is a high-frequency flyback quasi-resonant primary PWM controller, which has built-in active X2 capacitor discharge, supports wide range of Vcc power supply, and supports external thermistors for overtemperature protection and multiple perfect protection functions.
Gallium nitride power chip adopts nano-micro NV6127, QFN6*8mm package, thermal performance upgrade, 125mΩ conductivity, built-in driver support 10-30V power supply. Supports switching frequencies up to 2MHz.
Nano-NV6127 data information.
Charging head network disassembly learned that the use of nano-micro NV6127 gallium nitride chip products also include ASUS 300W charger, Lenovo 90W flash-charging dual-port gallium nitride charger, Beth 120W gallium nitride + silicon carbide PD fast charger and so on. In addition, nano-micro GaNFast power chips have previously been adopted by OPPO 50W cookie gallium nitride fast charge, RAVPOWER 65W 1A1C gallium nitride fast charge, Xiaomi 65W gallium nitride charger, SlimQ 65W gallium nitride fast charge, Anker PowerCore Fusion PD ultracharge, RAVPower 45W GaN PD charger, Beth 65W gallium nitride charger and other products, which have been highly recognized by the market.
Transformer close-up.
EL 1018 optocoupler for primary secondary communication, feedback output voltage.
Y capacitance close-up.
Silk screen IBHJM synchronous rectifier controller, MPS MP6908A, maximum operating frequency 600KHz, support DCM/CCM/QR quasi-resonant working mode, built-in ring detection to prevent DCM and QR operation under false opening, support logic voltage and standard voltage synchronous rectifier.
Synchronous rectified MOS tube adopts AOS Bandai AONS62922, NMOS, withstand voltage 120V.
Two output filtered solid capacitors are close-ups, both 25V 1000μF.
MCU close-up for intelligent distribution of three output powers.
At the output end, three USB female seats are welded to the small board, and there is an LED light small board on the far left.
The LED lights are affixed with a foam ring to prevent leakage of light.
The three output boards are exactly the same, and the three DC-DC circuits all adopt the Zhirong SW3516H scheme. The front of the board is equipped with a buck inductor and a filtered solid capacitor.
There is a buck protocol IC and three MOS tubes on the back.
The main control chip of the three-way buck circuit adopts Zhirong SW3516H for step-down control and protocol identification. Zhirong SW3516H is a highly integrated multi-fast charging protocol dual-port charging chip, which supports A+C port arbitrary port fast charging output, and supports dual-port independent current limiting.
The SW3516H integrates a 5A high efficiency synchronous buck converter. Support PPS/PD/QC/AFC/FCP/SCP/PE/SFCP and other fast charging protocols, maximum output PD 100W, CC/CV mode, and dual-port management logic. Only a small number of peripheral devices are required to form a complete dual-port charging solution with high-performance multi-fast charging protocol.
Through disassembly, the charging head network found that SW3516H was also used by Asus 65W 2C1A Gallium Nitride Charger, Nubia 65W Deuterium Feng Three-Port Gallium Nitride Fast Charger, Leibai 65W GaN Fast Charge, Greenlink 65W 4C GaN Fast Charge Charger, Lenovo 90W Flash Charge Dual-Port Gallium Nitride Charger, Hongdashun 120W Four-Port 2C2A Fast Charge and other products, in addition, Zhirong's fast charge chip can also be used for USB PD fast charge mobile power, fast charge car charging and other fields.
The three MOS tubes are identical, all 2WA401 are screen printed, two of which are used for synchronous rectifier buck for the interface output and one for the interface output VBUS switch.
Step-down inductive jacket insulated tube.
Close-up of a solid capacitor with a specification of 25V 220μF.
USB-C female close-up, via welding.
All disassembled, let's take a family portrait.
Charging head net disassembly summary
Folding pins, high power, multi-interface and compatible with a number of mainstream fast charging protocols on the market is the highlight of this charger, the total output power of 108W, can meet the vast majority of brands on the market laptop, tablet and mobile phone fast charging needs at the same time, for digital enthusiasts and often need to travel groups are very friendly, to make up for the previously disassembled SETCHI 100W Gallium Nitride fast charging of individual shortcomings.
Through disassembly, the charger adopts a high-frequency QR switching power supply architecture, and the scheme is the current mainstream ON Semiconductor NCP1342+MPS MP6908A, which is equipped with nano-NV6127 gallium nitride chip and AOS synchronous rectifier tube. The three DC-DC buck schemes all use Zhirong SW3516H, and the circuit design is exactly the same. The components on the PCB board are compactly arranged, isolated between the primary stages, and the module is also covered with thermal pads and heat sinks to help dissipate heat.