Baseus has recently launched a brand-new 67W gallium nitride fast charger, which features a fixed pin design, making it smaller and more portable. The charger is configured with a 1A1C interface and supports charging for both new and old devices. It also supports a set of 3.3-11V 5A PPS fast charging, and has excellent fast charging compatibility with Android phones and laptops that support high-power fast charging.

The Charging Head Network has already obtained the newly launched gallium nitride charger from Baseus. Now, let's disassemble it to see how the internal design and materials are.

The appearance of Baseus 67W gan charger

The front of the packaging box is printed with the Baseus brand, the appearance picture and name of the charger, as well as the two major selling points of 67W and GaN.

The back is printed with pictures of the charger's usage scenarios, detailed parameters and merchant information.

The package contains a charger, an instruction manual, cartoon stickers, etc.

The charger adopts the currently popular long rectangular column design, with a PC material white shell and a matte surface that is anti-fingerprint.

The Baseus brand is printed on one side of the waist.

The other side is printed with the merchant's name, the CCGAN67UC3 model and the 67W logo, etc.

The charger is equipped with fixed national standard pins.

The parameters of the charger are printed on the input terminal shell

Charging name: GaN3 Lite gan Fast Charging Charger

Model: CCGAN67UC3

Input: 110-240V 50/60Hz 1.5A

USB-C output: 5V3A, 9V3A, 12V3A, 15V3A, 20V3.35A

USB output: 5V3A, 9V3A, 12V3A, 20V2.25A

Usb-c +USB output: 45W+18W

Shenzhen Baseus Technology Co., LTD

The charger has passed the CCC certification.

The output terminal is equipped with two USB interfaces, 1C1A, and the rubber cores are both orange-red.

The height of the charger body was measured to be 60.78mm.

The width is 30.48mm.

The thickness is 34.94mm.

Compared with the 61W charger of Apple, its size advantage is very obvious.

The size when held in hand is intuitively felt.

The net weight is approximately 111g.

It was measured using ChargerLAB POWER-Z KT002 that the USB-C port supports Apple 2.4A, Samsung 5V2A, DCP protocols, as well as QC2.0/3.0, AFC, FCP, SCP, PD3.0, and PPS fast charging protocols.

The PDO message indicates that port C also has five fixed voltage ranges: 5V3A, 9V3A, 12V3A, 15V3A, and 20V3.35A, as well as one PPS voltage range from 3.3 to 11V5A.

It was measured that Port A supports QC2.0/3.0, AFC, FCP and SCP fast charging protocols.

Disassembly of Baseus 67W Gallium nitride Charger

After having a basic understanding of the Baseus 67W gallium nitride charger, let's continue to disassemble it to see how the materials and workmanship are.

Pry open the charger shell along the seam of the shell. The shell is fixed by ultrasonic waves. The pins and the PCBA module are powered by crimping with spring pieces. A heat dissipation pad is attached to the rectifier bridge for heat dissipation.

Remove the PCBA module inside the charger. The outer layer of the module is a brass heat sink, insulated by a Myla sheet, and the bottom is a thermal pad, which dissipates heat through the casing.

A thermal pad is pasted on the back of the PCBA module.

The length of the PCBA module was measured to be approximately 55.51mm using a vernier caliper.

The width of the PCBA module is approximately 29.94mm.

The thickness of the PCBA module is approximately 25.16mm.

Solder off the heat sink on the outer layer of the PCBA module, and stick a thermal pad inside the Mylar sheet for heat dissipation.

Two small plates are welded to the input end of the charger, respectively used for input rectification and switching power supply. The heat-generating components are placed separately to reduce temperature rise and dissipate heat evenly.

The output terminals, USB-C and USB-A female sockets, are both soldered onto the vertical small board. The charger is designed for secondary voltage reduction. Both interfaces support fast charging output. There is a thermal pad between the USB-C small board and the USB-A interface for heat dissipation.

A view of the front of the PCBA module: The bottom small board is welded with a rectifier bridge and input EMI filter components. Above it are the filter capacitor, transformer, secondary step-down inductor and output female socket in sequence.

The back is soldered with surface mount Y capacitors, synchronous rectifier controllers and synchronous rectifier tubes. Gallium nitride encapsulated chips and other chips are soldered onto small plates on the side.

Through the observation of the PCBA module of the charger, it was found that the Baseus 67W 1A1C dual-port gallium nitride charger adopts a flyback switching power supply combined with synchronous rectification, with a fixed voltage output. The output uses two independent synchronous step-down circuits controlled by a protocol chip to achieve dual-port wide voltage output and multi-port automatic power distribution functions. Now let's start from the input end to understand the design and materials of the entire charger.

Two rectifier Bridges are welded to the back of the input terminal small board for rectification. Remove the small board to observe the components on the back.

The front of the small board is welded with a fuse, a green NTC surge suppression resistor, a yellow safety standard X2 capacitor and a common mode inductor.

The specification of the input delay fuse is 3.15A 250V.

The NTC thermistor is silk-screened with 1.5D-7, with a diameter of 7mm and a cold-state resistance of 1.5Ω, used to suppress the inrush current when the charger is plugged in.

The safety standard X2 capacitor is from KWOKTRAN Dongguan Guocan Electronics, with a specification of 0.1μF.

Common mode inductors are made of enameled wire and insulated wire wound around green magnetic rings.

Two WRMSB40M rectifier Bridges are welded to the front of the small plate. The two rectifier Bridges are half-bridge connected to evenly distribute heat and reduce temperature rise. The WRMSB40M is from Shenzhen Wald Industrial Co., LTD. This soft bridge, through a relatively soft recovery curve and a relatively smooth turn-off characteristic, can reduce the junction capacitance of diodes and achieve a very small harmonic oscillation effect.

Detailed information about the Wald WRMSB40M.

Charging Head Network learned that the Wolde soft bridge has also been adopted by multiple products such as OPPO's 50W cookies gallium nitride fast charger, Hongdashun's 65W gallium nitride charger, Feifen's 65W USB PD gallium nitride charger, ROCK's 65W gallium nitride charger, Maiduoduo's 65W gallium nitride charger, and Maiduoduo's 30W 1A1C fast charging charger. The performance has been unanimously recognized by the customers.

The high-voltage filter capacitor is from Emerald, with a specification of 400V 33μF.

Differential mode inductors are made by winding enameled wire on magnetic rings and insulating them with heat shrink tubes.

The three high-voltage filter capacitors are from KINLS Sapphire, all with specifications of 27μF at 400V, and the total capacity of the filter capacitors is 114μF.

The rectified and filtered DC power is sent to the small board of the switching power supply. The left side of the small board is the USB-A step-down output circuit, the right side is the encapsulated gallium nitride chip, and the bottom of the small board is the voltage feedback optocoupler, which is used for output voltage feedback.

The primary chip of the charger adopts the Nanxin integrated gallium nitride chip SC3057, integrating the high-performance multi-mode flyback controller, gallium nitride driver, gallium nitride switch tube, power supply and protection circuits within a single heat-enhanced QFN6*8 package. Simplify the number of external components through sealing and eliminate the influence of parasitic parameters of traditional drive traces on high-frequency switches.

The Nanxin SC3057 adopts a design that separates power traces from control traces, reducing the impact of high-frequency switches on the control circuit. Moreover, through an optimized pad design, it optimizes the charger trace design and electrical performance, simplifying the design and development process. The Nanxin SC3057 is equipped with a 165mΩ gallium nitride switch tube, supporting a switching frequency of 175KHz and X capacitor discharge.

The filter capacitor for powering the Nanxin SC3057 has a specification of 50V 10μF.

The transformer is insulated by wrapping it with tape.

The surface mount Y capacitors are from Sichuan Terui Xiang Technology Co., LTD. They feature small size and light weight, making them highly suitable for application in high-density power supply products such as gallium nitride fast charging. The material number is TMY1152M.

Trelight is dedicated to the research and development, production and sales of passive components, with a registered capital of 100 million yuan. It has two self-owned 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 more solutions for customers.

Charging Head Network has learned that In addition to being certified by Baseus Qualcomm QC5 for 100W gallium nitride fast charging, Maiduo 100W gallium nitride, OPPO 65W Super Flash Charging gallium nitride charger, Lenovo 90W gallium nitride fast charging, Nubia 65W gallium nitride charger, and Baseus In addition to being used in dozens of high-power chargers such as the 120W gallium nitride + silicon carbide PD fast charger, it can also be applied to 20W mini fast chargers of brands like Hailutong, First Guard, and Belkin, and its performance has been unanimously recognized by customers.

The OR1009 optocoupler is used for output voltage feedback.

The synchronous rectifier controller is from South Chip, model SC3503. It is an adaptive turn-on detection and rapid turn-off synchronous rectifier controller that does not require auxiliary coil power supply. The output voltage can be as low as 0V. The patented adaptive turn-on detection circuit prevents the synchronous rectifier tube from being wrongly turned on. It is compatible with multiple MOS, has an ultra-low quiescent current, and supports multiple working modes. Supports high-side and low-side synchronous rectification, with very streamlined peripheral components.

The Nanxin SC3503 is a mature synchronous rectifier controller that has been applied in numerous products such as the 30W PD fast charging gallium nitride charger from UGREEN, the 65W 2C1A gallium nitride charger from Zhengtuo, the 65W gallium nitride socket from Baseus, and the 65W dual-port gallium nitride fast charger from Nubia Minion.

The synchronous rectifier tube is from Gufeng, with the model number GT045N10D5. It is a 100V withstand NMOS with a resistance of 4mΩ and is packaged in DFN5*6.

The output filter solid-state capacitor is from Ruilong, with a specification of 680μF and 25V.

Two independent step-down circuits are soldered to the output end of the charger for step-down output. Both dual-port outputs support fast charging.

The output terminal adopts a design of two identical secondary step-down circuits, and the step-down protocol ics are both from Nanxin Semiconductor SC9711. It supports an input withstand voltage of 40V and an output current of 6A. The device is simple and a single chip can achieve 1C1A fast charging.

The Nanxin SC9711 supports a power output of 100W, PD3.0 and PPS fast charging protocols, Huawei FCP/SCP, Samsung AFC fast charging, and Apple 2.4A charging. It supports communication between two chips simultaneously without the need for MCU control, achieving maximum power output on a single port and automatic power distribution when both ports output simultaneously.

The Nanxin SC9711 only requires an external switch tube and a VBUS path tube. The peripheral components are simplified. The switching frequency can be configured from 80 to 600KHz. It supports external NTC for overheat protection. The chip provides multiple protection functions such as pin overvoltage and short circuit protection, as well as output overvoltage, overcurrent, short circuit and overheat protection, to ensure the safety of the chip and the product.

Two step-down switch tubes are from Hena, with the model number CWR03N041AP.

The other step-down switch tube is of the same model.

The VBUS switch tube is also of the same model.

The magnetic ring step-down inductor for the USB-A port is directly insulated with barley paper from the USB-A female socket and has been removed during disassembly.

The output filter capacitor is from Emerald, BC series solid-state capacitors, with a specification of 220μF and 25V.

The USB-A female socket adopts an orange rubber core, with widened positive and negative poles, and supports high current fast charging.

The front of the USB-C port small board is soldered with a USB-C female socket, a step-down inductor and an output filter capacitor.

The back of the small board is soldered with the Nanxin SC9711 synchronous step-down controller and three MOSFETs.

Two Hena CWR03N041aps form a synchronous rectification and voltage reduction system.

The voltage reduction inductor is insulated by heat shrink tubing.

The output filter capacitor is from Emerald, BC series solid-state capacitors, with a specification of 220μF and 25V.

The output VBUS switch tube also adopts the Hena CWR03N041AP.

The USB-C female socket adopts an orange rubber core and is fixed by via welding.

Take a complete disassembly and a family photo.

Charging Head Network Disassembly summary

This gallium nitride fast charger launched by Baseus features a long white body and is equipped with a 1C1A dual output interface. The USB-C port supports a maximum output power of 67W and also supports 3.3-11V5A PPS fast charging. The USB-A port supports Huawei SCP and QC fast charging, with comprehensive protocol support, fully meeting the daily charging needs.

Charging Head Network has learned through disassembly that this Baseus gallium nitride charger adopts the integrated gallium nitride solution from Foundries. It uses the Foundries SC3057 integrated gallium nitride chip in combination with the SC3503 synchronous rectifier controller to form a fixed-voltage output switching power supply. The output is controlled by two SC9711 protocol chips with built-in step-down function. The core components inside the charger all come from the South core.

The interior of the charger is composed of three PCBS welded together to evenly distribute heat and reduce temperature rise. The internal step-down converter and protocol chip are soldered onto a vertical small board, making full use of the internal space. The PCBA module is covered with a large area of thermal pads and brass heat sinks for uniform heat dissipation. The materials and workmanship are both very solid.

Source of the article: Charging Head Network