The charging head network got a 65W gallium nitride charger from CMF, a sub-brand of Nothing, which is a circular plug with a printed gauge, a straight plate shape, and a black body. The charger supports 200-240VAC input, has 65W output power, and has a 2C1A fast charging interface, which supports automatic power distribution to meet the needs of laptop and mobile phone fast charging at the same time.
One of the major characteristics of the Indian market is that the voltage is unstable, this charger has been specially designed for the Indian market, not only using a high-voltage electrolytic capacitor with a withstand voltage of 550V internally, but also a built-in gallium nitride switch tube, which has also been upgraded from the conventional 650V to a withstand voltage of 900V, effectively coping with the special high voltage of the Indian market. The following brings a teardown of the Nothing CMF 65W gallium nitride charger, and let's take a look at the internal design and materials.
The Nothing CMF 65W GaN charger has a straight plate shape with a black non-slip material shell, and the main body and top surface are matte and shiny contrasting designs, respectively.
The front of the fuselage is equipped with a brand logo composed of rings, dots and circles.
The side design has 65W GaN dot matrix lettering.
The input shell is printed with the detailed parameter information of the charger, and the product has passed the Indian BIS safety certification.
Close-up of product parameters.
Model: C332
Input: 200-240v 50 60hz 12a
Output: USB-C1 C2: 5V3A, 9V3A, 12V3A, 15V3A, 20V325a（65w max）
pps：3.3-11v5a（16.5w-55w-20v3.25a（16.25w-65w）
usb-a：5v3a、9v3a、12v3a
usb-c1+usb-c2：45w+20w
usb-c1+usb-a：45w+18w
usb-c2+usb-a：5v3a
usb-c1+usb-c2+usb-a：45w+15w
The charger is equipped with stamp gauge pins.
The output terminal is equipped with three mainstream interfaces of 2C1A, which can meet the charging of up to three devices at the same time.
The measured length of the charger body is 5662mm。
The width is 5502mm。
The thickness is 2984mm。
Compared with Apple's 61W charger, the Nothing CMF 65W GaN charger has a significant advantage in size.
Feel the size of the charger in your hand.
In addition, the net weight of the charger is measured to be about 148g.
The USB-C1 port supports FCP, SCP, AFC, and QC3 as measured by using the ChargerLab Power-Z KM003C0/5、pd3.0、pps、dcp、apple 2.4A charging protocol.
PDO packets show that the USB-C1 port also has 5V3A, 9V3A, 12V3A, 15V3A, and 20V325A five sets of fixed voltage ranges, and 33-11v5a、3.3-20v3.25A two sets of PPS voltage ranges.
It is measured that the USB-C2 port supports FCP, SCP, AFC, QC30/5、sfcp、pd3.0、pps、dcp、apple 2.4A charging protocol.
PDO packets also have 5V3A, 9V3A, 12V3A, 15V3A, and 20V325A five sets of fixed voltage ranges, and 33-11v5a、3.3-20v3.25A two sets of PPS voltage ranges.
Finally, it was measured that the USB-A port supports FCP, SCP, AFC, QC30、sfcp、dcp、apple 2.4A charging protocol.
After reading the appearance and test of the Nothing CMF 65W gallium nitride charger, let's tear it down and take a look at the internal materials and workmanship.
First, disassemble the charger shell along the housing seam on the pin side, and fix the prongs through wire welding.
The PCBA module inside the charger is potted and filled to improve heat dissipation performance and weather resistance.
The PCBA module is fixed by a slot inside the housing.
Cut open the charger housing and take out the internal PCBA module.
The PCBA module is filled with thermally conductive adhesive potting as a whole.
The back is also filled with thermally conductive adhesive.
The length of the PCBA module measured by vernier calipers is about 529mm。
The width of the PCBA module is about 499mm。
The thickness of the PCBA module is about 254mm。
The front of the PCBA module is at a glance, with a welded fuse in the upper left corner, an NTC thermistor, a safety X2 capacitor, a rectifier bridge welded on the top, and a high-voltage filter capacitor welded on the bottom. The high-voltage filter capacitor is welded in the lower left corner, the transformer is welded below, the step-down plate, the step-down inductor and the filter solid-state capacitor are welded on the right side, and the black isolation plate is used to insulate the primary stage components.
The back of the PCBA module is soldered with a primary main control chip, feedback optocoupler, SMD Y capacitor, corresponding synchronous step-down controller and step-down MOS tube.
Through the observation of the PCBA module, it is found that the Nothing CMF 65W gallium nitride charger adopts a QR flyback architecture with a fixed voltage output to power the step-down board. Through two independent synchronous step-down circuits, the fast charging output of two USB-C ports and USB-A ports is realized. Let's start with the input to understand the information of each device.
Side view of PCBA module, solder fuse, NTC thermistor and high-voltage filter capacitor.
The input fuse is from Better Electronics, the discharge number is 932, and the specification is 315a 250v。
NTC thermistor jacket heat shrink tube insulation.
The green NTC thermistor is from Jiuyin, model 8S2R5M, and is used to suppress inrush current when the charger is powered up.
The side of the PCBA module is welded with safety X2 capacitors, rectifier bridges and step-down output boards.
The safety x2 capacitor is from Matsuda Electronics, and the specification is 022μf。
The common mode inductor is made of magnetic surrounding, insulated by heat shrinkable tubing on the outside, and welded with an insulating bracket at the bottom.
The rectifier bridge is from Yangjie Electronics, model D8UB100, specification is 8A1000V.
The side of the PCBA module is welded with high-voltage filter capacitors, transformers and output filter capacitors.
The high-voltage filter capacitor is from Dongjia and is specified at 550V22 F.
There is also a 550 V10 F specification with a total filter capacitor capacity of 52 F.
The differential mode inductor is wound with an I-shaped core, and the jacket is insulated by a heat shrinkable tube.
The primary main control chip comes from Huayuan Zhixin, model HY1658L, which is an intelligent digital multi-mode flyback controller, the chip integrates high-voltage start, supports a variety of working modes, and can automatically switch between QR and CCM modes to balance switching loss and conduction loss. Built-in jitter improves EMI performance, and an adaptive gate driver balances switching losses and EMI to drive an output voltage clamp of 12V.
HY1658L has perfect protection functions, supporting output over-voltage protection, power supply over-voltage protection, transformer magnetic saturation protection, under-voltage over-voltage protection, overload protection, chip over-temperature protection and current sampling resistance open-circuit protection. Suitable for USB PD chargers, TV monitor standby power and notebook power supply applications, in an SOP7L package.
Huayuan Zhixin HY1658L data information.
The filter capacitor that supplies power to the main control chip is also from Dongjia, with a specification of 50V10 F.
The gallium nitride switch is from Runxin Micro, model RX90T150PS2A, which is a CACODE cascade structure of gallium nitride switch, the device withstand voltage is 900V, the conduction resistance is 150M, and the TO220 package is used. The RX90T150PS2A supports 20V gate voltage, which is compatible with traditional controllers, simplifying the drive circuit, and has sufficient headroom for gate withstand voltage to cope with adverse factors such as voltage overshoot during the switching process, avoiding potential damage and failure of the device.
Runxin Micro RX90T150PS2A Profile Information.
The transformer is tightly wound and insulated with adhesive tape.
The two SMD Y capacitors are from Sichuan Teruixiang Technology Co., Ltd., with the material number TBY2102ME, which belongs to the SMD-Y2 series and uses two in series. The SMD Y capacitors of Truxiang have the characteristics of small size and light weight, which 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 dismantling, the charging head network 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 to Igor's 40W LED driver power, Changhong 42-inch smart network TV 42P3F built-in power supply, Zhuo Feihang 45W gallium nitride ultra-fast wall charge and other products, the performance has been unanimously recognized by customers.
Two identical SMD Y capacitors are soldered on the back.
Everlight EL1019 optocoupler is used for output voltage feedback.
Synchronous rectifier controller silkscreen printing IBHJN, the actual model is MP6908A, from MPS Xinyuan Semiconductor, the maximum working frequency is 600kHz. It supports DCM, CCM, QR, ACF multiple working modes, supports high-side and low-side applications, and has ringing detection to prevent false opening.
The synchronous rectifier tube is from AOS, model AONS62922, which is a NMOS with a withstand voltage of 120V and a conduction resistance of 58M, in DFN5*6 package.
The output side of the PCBA module is welded with a filter capacitor and an output board.
The output filter capacitor is from PolyCap, which is a 125 heat-resistant solid state capacitor of the RQ series with a specification of 820 F 25V.
According to the dismantling of the charging head network, the products of Berry are widely used in chargers, car chargers, wireless charging, mobile power supplies, energy storage power supplies and other fields, and have been used in a variety of products of well-known brands such as Huawei, OPPO, vivo, Xiaomi, Honor, Samsung, Lenovo, Transsion, Zimi, Nubia, Bull, ANKER, etc., and the products have been highly recognized by the market.
The front of the output board is soldered with USB-C receptacle and USB-A receptacle.
Two protocol chips are soldered on the back of the board, and three VBUS switches correspond to two USB-C and one USB-A female connector.
The USB-C1 port protocol chip adopts Yingjixin IP2723T, which has passed the USB IF Association PD30 PPS certification, TID: 3135, is a multi-protocol integrated fast charging protocol IC for USB output port. It supports a variety of fast charging protocols, including USB TypeC DFP and PD20/3.0、pps 、hvdcp qc4、qc4+、qc3.0/2.0、fcp、scp、afc、mtk pe+ 2.0/1.1、apple 2.4a、bc1.2 as well as Samsung 20a。On the right is the TVS protection tube of the USB-C receptacle, which is used for the electrostatic protection function.
It can provide a complete Type-C solution for unidirectional output applications such as adapters and car chargers. In addition, IP2723T has a high level of integration and rich functions, and only requires very few peripheral components for application, effectively reducing the size of the overall solution and reducing the BOM cost.
Yingjixin IP2723T data information.
The charging head network dismantled and learned that Yingjixin IP2723T has been used by many brands such as Flashmo, Momis, REMAX, Maiduoduo, Hua Kelong and other brands of 20W chargers, and has also been used by Momax 65W 2C1A GaN fast charging charger, Nubia 65W USB PD GaN charger, Nubia 1A1C 45W Deuterium Front GaN fast charger and other GaN chargers, in addition, Yingjixin fast charging chips can also be used in various charging fields such as car charging, mobile power supply, adapters, etc., and are used by XiaomiMore than 100 products from well-known brands such as Huawei, Samsung, and Tesla are used.
USB-C2 and USB-A port protocol chips are from Yingjixin, model IP2726, which is a very widely used protocol chip. Yingjixin IP2726 is a fast charging IC that integrates multiple protocols and is used for USB output ports, supporting Type-C DFP and PD20/3.0、pps、qc4+、qc2.0/3.0、fcp、afc、scp、mtk pe+、apple2.4a、bc1.2 as well as protocols such as Samsung 2A. With high integration and rich functions, only a few peripheral components are required in the application, which effectively reduces the size of the overall solution and reduces the BOM cost.
The charging head network learned that Yingjixin IP2726 has previously been Aukey 65W 1A1C GaN fast charging charger, R**Power 90W dual USB-C port PD fast charging charger, Stark 100W dual USB-C port gallium nitride charger, Maiduoduo 30W 1A1C USB PD fast charging charger, Kunxing 18W USB PD30 pps fast charging charger and other products.
The controller for the USB-C interface buck output is from Nanxin Technology, model SC8002, which is a synchronous buck controller that can be configured as dual output or single output. The SC8002 regulates the output voltage to a 5V or other voltage by setting a voltage divider resistor. High-accuracy output current limiting is also provided. When either of the two output channels reaches the set current limit, the SC8002 enters constant current (CC) mode. The total output power can be set by the resistor, which is convenient for constant power control.
The SC8002 can be set to the frequency and select either PWM or PFM operation. With the smallest BOM, the maximum functionality can be achieved for the user's different applications. The SC8002 also supports full-featured protection, including under-voltage protection, over-voltage protection, short-circuit protection, auto-restart, and over-temperature protection. SC8002 is mainly used in car chargers, multi-group interface adapters, hubs, industrial voltage conversion, etc.
Through the dismantling of the charging head network, it was learned that Nanxin Technology SC8002 was also used by vivo X Fold original 80W dual C-port gallium nitride flash charging, Akasics 300W portable energy storage power supply, Kexun 65W 1A1C gallium nitride fast charging, AuKey 100W gallium nitride fast charging, Momis 65W 2C1A gallium nitride fast charging and other products.
The switch tube is from Weizhao Semiconductor, model VS3618BE, NMOS, withstand voltage 30V, and conduction resistance is 52M in a PDFN3333 package.
Weizhao VS3618BE details.
Through the dismantling of the charging head network, the products using Weizhao VS3618BE also include Nubia 20W PD fast charging charger, Xiaomi 11 original 55W gallium nitride charger, Huntkey 55W USB PD fast charging charger, Xiaomi 33W PD fast charging, Xiaomi mobile phone original 30W fast charging, etc., and the product performance of Weizhao MOS has also been recognized by many well-known brands.
The other step-down circuit also uses Nanxin Technology's SC8002 synchronous step-down controller.
The step-down switch adopts Weizhao Semiconductor VS3618BE.
The step-down inductor jacket is insulated with heat shrink tubing and a bakelite board at the bottom.
The two filter capacitors are from Dongjia, KS series solid-state capacitors for fast charging, with a specification of 25V330 F.
The VBUS switch for the USB-C1 interface adopts Weizhao VS3618BE.
USB-C2 and USB-A interface VBUS switch tubes use VPontek VS3618BE.
The USB-C receptacle is fixed by via soldering, and the black rubber core does not expose copper.
The USB-A receptacle is also made of black rubber core.
A list of all dismantling and a family photo.
Nothing CMF's GaN charger features a stamp-gauge fixed prongs and a black straight body design. The charger has an output power of 65W, supports 200-240V input, and has a 2C1A output interface. Among them, the two USB-C ports support 65W fast charging, support power blind plugging, and support power blind plugging when the two interfaces are used at the same time, and the measured charger also supports PPS fast charging, which has good fast charging compatibility.
Through the dismantling of the charging head network, it was learned that the 65W gallium nitride charger of Nothing CMF uses Huayuan Zhixin HY1658L main control chip with Runxin Micro RX90T150PS2A gallium nitride switch tube, and uses Yingjixin IP2723 and IP2726 two protocol chips, with the output of Nanxin Technology SC8002 synchronous step-down controller.
Runxin RX90T150PS2A gallium nitride switch has a withstand voltage of 900V and a transient withstand voltage of 1000V, which can meet the special high voltage requirements of the Indian market. Dongjia 550V electrolytic capacitors and solid-state capacitors are used inside the charger, the PCBA module adopts potting process to improve weather resistance and heat dissipation performance, and the interface is equipped with TVS diodes for electrostatic protection, and the workmanship and materials are very solid.