Mophie launched a67WGallium nitrideCharger, this charger adopts the national standard folding pin, which is convenient for daily carrying and storage.The output end is2C1AInterface configuration, both USB-C interfaces support67WOutput power,USB-A port supports 18W fast charging and automatic power distribution function.
This charger uses Dongke Semiconductor DK8607AD active clamping flyback power chip internally, which is the first ACF in the industryGallium nitrideSealed chip, integrated with ACF controller, isolation driver and twoGallium nitrideSwitch tube, greatly simplifying circuit design and improving conversion efficiency.The following charging head network brings this modelGallium nitrideTake a look at the internal scheme and materials for the disassembly of the charger.
The packaging box is based on black and white color design, with mophie brand, charger appearance, name and67WHigh speed fast chargingGaN technology has two selling points.
Charger parameters, warranty time, certification and other information are printed on the back.
A close-up of the parameters on the packaging box will be introduced in the next part of the product physical display.
The package contains the charger and its operating instructions, and the protective film on the charger body is scratch resistant.
The charger is a classic column shaped design. The body is made of PC anti-skid white shell, with frosted surface and fingerprint resistance. The overall design style is very simple.
The detailed parameter information of the charger is printed on the shell of the body input terminal.
Manufacturer: Zige (Shenzhen) Technology Development Co., Ltd
The charger has passed CCC certification.
The charger is equipped with foldable national standard pins, which can be easily stored and carried.
The output end housing is printed with mophie brand and configured2C1AThree USB interfaces, two of which are printed with USB-C1 and USB-C2 beside the C port, which is convenient for users to use differently.
The measured length of charger body is 55.13 mm.
The width is 44.08mm.
The thickness is 31.16mm.
In addition, the measured net weight of the charger is about 124g.
Using ChargeLAB POWER-Z KM003C, it is measured that the USB-C1 interface supports FCPSCP, AFC, QC3.0/5, PD3.0, PPS, DCP, Apple 2.4A charging protocol.
PDO message shows that USB-C1 port also has five sets of fixed voltage gears, namely 5V3A, 9V3A, 12V3A, 15V3A, 20V3.35A, and 5-21V3.35A, and one set of PPS voltage gears.
The PDO message is the same as that of the USB-C1 interface.
Finally, it is measured that the USB-A interface supports FCPAFC, QC3.0, DCP charging protocol.
Demophie 67W GaN charger disassembly
After seeing the unpacking and testing of Mophie's GaN charger, we will disassemble it and have a look at the internal scheme and materials.
First, disassemble the charger shell along the shell seam. The inner part of the shell adopts the potting process to improve the heat dissipation performance and reliability.
The fold pin is connected to the PCBA module by wire welding.
Extract the PCBA module from the housing and continue disassembly.
The PCBA module is fixed through the slot inside the housing.
The measured weight of PCBA module is about 93.4g.
The switching power supply part of PCBA module is sealed with potting glue.
The back of the PCBA module is provided with a copper heat sink.
The length of PCBA module measured with vernier caliper is about 51.6mm.
The width of PCBA module is about 39mm.
The thickness of PCBA module is about 26mm.
Clean the potting glue on the surface of PCBA module, and set Mylar insulation between the output step-down panel and the transformer.
Weld and fix the brass heat sink on the back of the PCBA module, and stick the heat conduction pad for heat dissipation.
The front of the PCBA module is at a glance. The lower right corner is the input end, and a small board is welded.Weld the transformer in the middle position. The right side is the high-voltage filter capacitor, and the left side is the step-down output board.
The back of the PCBA module is equipped with brass heat sink and insulating Mylar.
The back of PCBA module is welded with rectifier bridge, GaN sealing chip, SMD Y capacitor, SMD optocoupler and synchronous rectifier tube.
The PCBA module is welded and disassembled. The left side is the input EMI board, the middle is the switching power supply board, and the right side is the step-down output board.
Through observation of PCBA module,The mophie 67W GaN charger adopts the Dongke Semiconductor ACF sealed GaN power supply scheme, which is equipped with synchronous rectification, fixed voltage output, and two independent step-down circuits for output, realizing the functions of three port fast charge output and automatic power distribution.Now let's start from the input to understand the scheme and materials of the whole charger.
List the input terminals of PCBA module, weld a small board, and weld the differential mode inductance and high-voltage filter capacitor on the right side.
The input fuse specification is 3.15A250V.
Common mode inductance is wound with enameled wire and insulated wire.
SMD safety gauge X2 capacitor comes from Sichuan Teruixiang Technology Co., Ltd., which has the characteristics of small size and light weight, and is very suitable for application in high-density power supply products such as GaN fast charging.The part number is TMY1222M.
Teruixiang focuses on the R&D, production and sales of passive components, with a registered capital of 100 million yuan.It has two independent capacitor brands: SMD TRX and DIP TY capacitors,TRX will be committed to the research of ceramic materials to expand the application of more categories and provide customers with more solutions.
The rectifier bridge is from Ping Wei, with model of TBMR810 and specification of 8A1000V.
The high-voltage filter capacitor is from Chengxing, the specification is 27 μ F400V, and the total capacity of the four capacitors is 108 μ F.
Differential mode inductance is insulated by heat shrinkable tube.
The core component of this charger is from Dongke Semiconductor, model DK8607AD, which is an active clamping flyback control AC-DC power switch chip integrated with two GaN power devices,DK8607AD uses leakage inductance energy to realize primary power transistor ZVS and secondary rectifier tube ZCS, reduce the profitability of power transistors, reduce switching losses and improve electromagnetic interference, thus improving the efficiency of power supply system.
DK8607AD greatly simplifies the design and manufacture of flyback AC-DC converter, especially for power supply products requiring high conversion efficiency and high power density.The chip has perfect protection functions, including output overvoltage protection,VCC overvoltage protection,VCC undervoltage protection, overheat protection, open-loop protection, output overcurrent and output short circuit protection.
DK8607AD is equipped with two GaN switches with 400m Ω and 260m Ω resistances, integrated controller and driver inside, and simplified peripheral components.The chip has a built-in high-voltage startup circuit and X capacitor discharge circuit, supports 1MHz switching frequency, standby power consumption is less than 50mW, and is packaged with DFN8 * 8.
DK8607AD data information of Dongke Semiconductor.
Two MLCC capacitors in parallel are used as clamping capacitors.
The transformer shall be tightly wound with tape for insulation, and the secondary shall be wound with multi-layer insulated wires.
The two SMD Y capacitors are from Sichuan Teruixiang Technology Co., Ltd., which are characterized by small size and light weight, and are very suitable for use in high-density power products such as GaN fast charging.The part number is TMY1102M.
OR1009 optocoupler is used for output voltage feedback.
The synchronous rectification chip is from Dongke Semiconductor, model DK5V100R10VL, which is a synchronous rectification chip without periphery.The chip has built-in 100V voltage withstand and 10m Ω resistance synchronous rectifier tube, which can greatly reduce the conduction loss of traditional Schottky diodes, directly replace Schottky diodes, improve the power conversion efficiency and improve EMI.
Dongke Semiconductor DK5V100R10VL supports CCM/DCM/QR working mode, built-in intelligent detection, and no synchronous signal is required.The chip has self power supply technology and no peripheral components are required. It is suitable for USB PD fast charging, power adapter and LED driving power supply, and is packaged with TO-252.
Dongke Semiconductor DK5V100R10VL data information.
The output terminal of the charger is welded with two filter capacitors and the output small board, and the small board is welded with USB-C bus base and USB-A bus base, as well as two filter capacitors.
Mylar insulation is set between the small board and the primary components.
The specification of two filter capacitors is 470 μ F25V.
The front of the small pressure reducing plate is welded with the USB-C mother seat,USB-A bus base, synchronous step-down switch tube and two filter capacitors.
Back soldering protocol chip,VBUS switch tube and two magnetic ring inductors.
The USB-C1 port protocol chip adopts the British chipset IP2723T, which has passed the USB IF Association PD3.0 PPS certification,TID:3135,It is a fast charging protocol IC integrated with multiple protocols and used for USB output port.Support a variety of fast charging protocols, including USB TypeC DFPPD2.0/3.0, PPS, HVDCP QC4, QC4+, QC3.0/2.0, FCP, SCP, AFC, MTK PE+2.0/1.1, Apple 2.4A, BC1.2 and Samsung 2.0A.The right side is the TVS protection tube of the USB-C female seat, which is used for electrostatic protection.
It can provide a complete TYPE-C solution for one-way output applications such as adapters and car chargers.In addition, IP2723T has a high degree of integration and rich functions, requiring only a few peripheral devices in application, effectively reducing the size of the overall scheme and reducing BOM costs.
The protocol chip of USB-C2 and USB-A ports is from Yingjixin, with the model of IP2726. It is a protocol chip that is widely used.Yingjixin IP2726 is a fast charging IC integrated with multiple protocols and used for USB output port, supporting Type-C DFPPD2.0/3.0, PPS, QC4+, QC2.0/3.0, FCP, AFC, SCP, MTK PE+, Apple2.4A, BC1.2, Samsung 2A and other protocols.With high integration and rich functions, it only needs a few peripheral devices in application, effectively reducing the size of the overall scheme and reducing BOM cost.
The synchronous rectifier step-down controller for step-down output is from Yingjixin, with the model of IP6550. It is a synchronous step-down controller supporting 36V input, with built-in NMOS tube drive and external two MOS tubes for efficient synchronous rectification and step-down.IP6550 adjusts the output voltage through the feedback pin.The switching frequency is 135KHz, the input terminal withstand voltage is 48V, and the built-in perfect protection function.Yingjixin IP6550 adopts 3 * 3mm QFN16 packaging, which can realize simplified synchronous buck conversion circuit design.
IP6550 can be used for car charger, multi port adapter, smart plug, plug supporting USB-C interface and dash cam applications.Synchronous rectification voltage reduction has high conversion efficiency, high output current can be used for multi port 5V output, and it can achieve wide range voltage regulation with PD protocol chip, meeting the application of USB PD3.1.
A close-up of the magnetic ring step-down inductance, insulated with a heat shrinkable tube and a bakelite board at the bottom.
The output filter capacitor specification is 220 μ F25V.
The VBUS switch tube is silk printed YC15N03, and the three interface VBUS switch tubes have the same model.
Take a look at all of them and have a family photo.
Disassembly summary of charging head network
Mophie's gallium nitride charger adopts a white square shell and is equipped with a national standard folding pin, which is convenient for daily carrying and storage.Charger is2C1AInterface configuration, supporting 67W fast charging output.The two USB-C interfaces also support power blind plugging, PPS fast charging, and are compatible with Apple laptops, Apple phones, and Android phones.
The charging head network learned through disassembly that,Mophie charger adopts the fast charging power supply scheme of Dongke Semiconductor GaN, and uses DK8607AD active clamping sealed GaN chip with DK5V100R10VL synchronous rectification chip,DK8607AD is internally integrated with ACF controller, isolation driver and two GaN switch tubes, with high integration and simple peripheral components.
Dongke Semiconductor DK5V100R10VL is a synchronous rectifier chip with zero periphery, which can directly replace Schottky diodes to improve conversion efficiency.The output adopts two protocol chips, Yingjixin IP2726 and IP2723, and IP6550 synchronous step-down controller for output.The interior of the charger adopts the potting process to improve the heat dissipation performance and weather resistance. The internal materials are solid and the workmanship is reliable.