Since Apple launched notebooks and chargers that support PD3.1 power supply, many fast charger manufacturers have launched corresponding 140W chargers. Today's disassembly is a 2C1A multi-port gallium nitride charger from Momis, which uses folding pins for easy portability and storage. The USB-C1 port supports 140W output power, which can meet the fast charge needs of Apple laptops.

 

In addition, USB-C2 supports 100W fast charge, USB-A port also supports fast charge, and supports automatic power distribution to meet the needs of multiple devices at the same time. The following charging head network will disassemble this 140W multi-port charger from Momis, and take a look at the internal design and material work.

 

Before the charging head network also disassembled Momis 100W 4C2A 6-port GAN wireless desktop charger, Momis 100W 2A2C GAN fast charger, Momis 40W dual USB-C fast charger, Momis 30W PD fast charger, Momis Mini 20W PD fast charger and other products, welcome to check.

 

 

Momis 140W gallium nitride charger Unbox

 

 

The packaging box is MOMAX's consistent simple blue and white design style, and the front is printed with the MOMAX brand, product name, use scene icon, GaN (Gallium nitride) technology, 140W icon selling point, etc.

 

 

The back of the charger is printed with the usage scenario and specifications information.

 

 

The package includes the charger and the instruction manual.

 

 

The charger is designed as a straight plate, with a white shell made of PC fireproof material, and the surface is frosted and anti-fingerprint.

 

 

The front of the body is printed with the MOMAX brand and GaN words, so that users can intuitively understand that this is a gallium nitride charger.

 

 

On the back is the Qualcomm QC3.0 and PD3.1 fast charge logo, and the general protocol compatibility is good.

 

 

Charger parameters are printed on the side of the body
Model: UM27
Input: 100-240V to 50/60Hz 2A
Total output: 140W MAX
USB-C1 output: 5/9/12/15V3A, 20V5A, 28V5A
USB-C2 output: 5/9/12/15V3A, 20V5A
USB-A output: 4.5V5A, 5V4.5A, 9V3A, 12V2.5A, 20V1.5A
Manufacturer: AMIS Electronics (Shenzhen) Co., LTD
Producer: Momis Technology (Shenzhen) Co., LTD
The product has passed CCC certification.

 

 

The charger is equipped with a foldable national standard pin, which is easy to carry and will not scratch other equipment in the bag.

 

 

The output end is equipped with 2C1A three USB interfaces, and the interface is printed with QC and PD fast charge identification.

 

 

The measured height of the charger body is 73.15mm.

 

 

The width is 73.07mm.

 

 

The thickness is 28.73mm.

 

 

Compared with Apple 140W charger, the volume is smaller.

 

 

The size of the product in your hand is intuitive.

 

 

In addition, the net weight of the charger is about 285g.

 

 

Using the ChargerLAB POWER-Z KM003C test, the USB-C1 port supports FCP, SCP, AFC, QC3.0/5, PD3.1, PPS fast charge protocol.

 

 

It also has six sets of fixed voltage gears of 5V3A, 9V3A, 12V3A, 15V3A, 20V5A and 28V5A, and a set of PPS voltage gears of 3.3-21V5A.

 

 

The measured USB-C2 port supports FCP, SFCP, SCP, AFC, QC3.0/5, PD3.0, PPS fast charge protocol.

 

 

And with 5V3A, 9V3A, 12V3A, 15V3A, 20V5A five sets of fixed voltage gear, and 3.3-21V5A a set of PPS voltage gear.

 

 

The measured USB-A port supports FCP, SFCP, SCP, AFC, QC3.0 fast charge protocols.

 

 

Momis 140W gallium nitride charger disassembled

 

After seeing the unpacking and testing of this 140W gallium nitride charger from Momis, we will disassemble it and learn about the internal design of this charger.

 

 

First, pry open the charger shell along the joint of the shell, and the inside is filled with potting.

 

 

Use a cutting machine to cut the shell and take out the inner PCBA module. The gap between the PCBA module and the heat sink is filled with gray thermal potting glue.

 

 

The length of PCBA module measured by vernier caliper is about 69.51mm.

 

 

The PCBA module width is approximately 68.56mm.

 

 

The PCBA module thickness is approximately 25.06mm.

 

 

The folding pins are connected by wire welding.

 

 

The brass heat sink is soldered to the PCBA module.

 

 

Weld and remove the brass heat sink covered by the PCBA module, clean the potting glue filled with the PCBA module, and continue the disassembly.

 

 

The PCBA module welds several small plates to make full use of space and has a very compact design.

 

 

The output side is welded with solid state filter capacitor and step-down plate.

 

 

PCBA module front view, the lower right corner welding two small plates, respectively welding fuse, EMI filter circuit and rectifier bridge. The high voltage filter capacitor, resonant capacitor and resonant inductor are welded on the upper right side, the transformer is on the upper left, and the output filter capacitor is on the left side of the transformer. Below the transformer is the PFC boost inductor, and to the left of the PFC boost inductor is the output step-down plate.

 

 

A PFC+LLC 2-in-1 controller is welded to the back of the PCBA module, two LLC switch tubes are welded to the upper left, patch Y capacitor is welded to the right, two synchronous rectifier tubes and synchronous rectifier controller and feedback optocoupler. A PFC switch tube, PFC rectifier tube and patch Y capacitor are welded to the bottom.

 

Through the observation of the front and back of the PCBA module, it is found that this 140W gallium nitride charger of Momis adopts PFC+LLC switching power supply architecture design, adopts MPS power supply scheme, PFC boost switching tube and LLC switching tube both use nano gallium nitride power chip, and silicon carbide diode is from Pingwei. The output adopts the two-channel core protocol chip and the South Core technology step-down controller for multi-port fast charge output. Let's start from the input side to understand the design and materials of the entire charger.

 

 

Charger input small plate welded wire is connected to folding pin.

 

 

Small plate front welded delay fuse, common mode inductor and blue Y capacitor.

 

 

There are no welding elements on the back of the small plate.

 

 

The input delay fuse specifications are 5A 250V.

 

 

The common mode inductor is wound with enamelled wire and insulated wire.

 

 

Blue Y capacitor from JEC Zhixu Electronics.

 

The red Safety gauge X2 capacitor from JURCC Gateway Electronics is 0.68μF.

 

 

The second stage common mode inductor is wound with flat copper wire and welded with insulated support at the bottom.

 

 

The rectifier bridge is welded on the vertical small plate. The rectifier bridge is from PY Pingwei, model TBM810, specification 8A 1000V, and is connected by two half Bridges with equal heat distribution.

 

 

Copper and tin are exposed on the back of the small plate to increase the heat dissipation area.

 

 

The two thin film filter capacitors are from JURCC Gateway Electronics and are 1μF 450V.

 

 

The filter inductor adopts magnetic surround system.

 

 

The power control chip adopts MPS HR1211, which is a multi-mode PFC and current mode LLC two-in-one controller. The functions that can be realized by 2-3 chips in the traditional chip scheme are integrated into one chip. The PFC controller supports CCM and DCM working modes.

 

The HR1211 uses digital loop control, and the chip parameters can be flexibly configured. Support high voltage start and intelligent X capacitor discharge, PFC level supports up to 250KHz operating frequency, LLC level built-in 600V half-bridge driver, internal integrated bootstrap diode, operating frequency up to 500KHz, support rich protection functions.

 

 

PFC boost switch tube from Nano, is a gallium nitride power chip, model NV6127, the internal integration of gallium nitride switch tube, gallium nitride driver and logic circuit, simple application. NV6127 adopts QFN6*8mm package, upgraded heat dissipation performance, 125mΩ conductive resistance, and built-in driver supports 10-30V power supply. The maximum switching frequency is 2MHz.

 

 

Nano semiconductor NV6127 data information.

 

It is understood that the products using Nano NV6127 gallium nitride chip also include Lenovo 90W flash charge dual-port gallium nitride charger and Bex 120W gallium nitride + silicon carbide PD fast charger. In addition, Nano GaNFast power chip has been OPPO 50W biscuit GAN fast charge, RAVPOWER 65W 1A1C GAN fast charge, Xiaomi 65W GAN charger, SlimQ 65W GAN fast charge, Anker PowerCore Fusion PD ultra charge, RAVPower 45W GaN PD charger, Bex 65W gallium nitride charger and other products are adopted and highly recognized by the market.

 

 

PFC boost inductors are tightly wrapped and insulated with adhesive tape.

 

 

PFC rectifier from Pingwei, model DCSC0665E, specification 6A 650V, is a silicon carbide diode, DFN5*6 package.

 

 

The screen printing ES5J's fast recovery diode is used to charge the electrolytic capacitor when the charger is powered on, bypassing the PFC circuit.

 

 

Four high-voltage filter capacitors are welded to a small plate inside the charger.

 

 

Capacitors for two large and two small welding.

 

 

Five high-voltage filter capacitors are from JK Junkang, three of which are 25μF450V.

 

 

The other two specifications are 22μF450V, and the total filter capacitance is 119μF.

 

 

Two LLC half-bridge switch tubes use two nano NV6125 gallium nitride power chips, built-in driver, no external driver, 175mΩ resistance, voltage 650V, support 2MHz switching frequency, heat dissipation enhanced QFN6*8mm package, suitable for boost, buck, half-bridge, full-bridge switching power supply and many other applications.

 

 

Nano NV6125 data information.

 

Charging head network learned that the chip is also used in OPPO's new 65W super flash charge gallium nitride charger, Lenovo thinkplus65W Gallium nitride lipstick power Pro, Lenovo 90W flash charge double-port gallium nitride charger, thinkplus65W Gallium nitride fast charge, Hongda Shun 65W Gallium nitride fast charge and many other products.

 

 

The resonant capacitor is from JURCC Gateway Electronics and has a specification of 0.015μF1000V.

 

 

Close-ups of resonant inductors.

 

 

Transformer close-up, using tape tightly wrapped insulation, secondary using multi-layer insulated wire.

 

 

Two 100μF35V electrolytic capacitors are used to power filter the main control chip.

 

 

Chip Y capacitor from Sichuan Terixiang Technology Co., LTD., model TMY1102M, with small size, light weight and other characteristics, very suitable for use in gallium nitride fast charge such as high density power supply products.

 

Terixiang focuses on the research and development, production and sales of passive components, with a registered capital of 100 million yuan. There are two independent capacitor brands: SMD TRX and DIP TY capacitors, TRX will be committed to the research of ceramic materials, in order to expand the application of more categories, to provide customers with more solutions.

 

Charging head network learned that in addition to Belkin, Anker, QCY, sound Li, Maiduo, OPPO, Lenovo, Nubia, Bex, Hailutong, First Wei and other brands of dozens of fast charge products used, In addition, it is also used by Igor 40W LED drive power supply, Changhong 42-inch smart network TV 42P3F built-in power supply, and ZHOfly 45W gallium nitride ultra-fast wall charge, and its performance has been unanimously recognized by customers.

 

 

Another Terixiang patch Y capacitor model is TMY1101K.

 

 

EL1019 optocoupler is used for output voltage feedback.

 

 

The synchronous rectifier controller from MPS, Model MP6924A, is an LLC synchronous rectifier controller with enhanced anti-interference and fast shutdown function, compatible with CCM/DCM mode. The MP6924A has two integrated synchronous rectifier controllers, one for each LLC secondary coil output for LLC converter synchronous rectifier applications. At the same time support 4.2-35V wide range of operating voltage, can be applied to USB PD3.1 fast charge 140W power supply design.

 

 

A depletion MOS tube from Fang Zhouwei, model DMZ0615E, with subthreshold characteristics, is used to stabilize the output voltage and step-down the power supply to the synchronous rectifier controller, extending the service voltage range and reducing power consumption.

 

 

Two synchronous rectifier tubes from Pingwei, silk screen D80N10ES.

 

 

Output side welded filter solid state capacitor, step-down output small plate.

 

 

The output filter capacitors are from PolyCap, one of which is the RA series high voltage solid state capacitor with a specification of 220μF 35V.

 

It is learned that the products of Boricai are widely used in chargers, car charging, wireless charging, mobile power, energy storage power and other fields, and are adopted by OPPO, vivo, Xiaomi, Honor, Samsung, Huawei, Lenovo, purple rice, Nubia, Bull, ANKER and other well-known brands, and the products are highly recognized by the market.

 

 

The other filter capacitor is the RT series ultra-high ripple current product, the specification is 560μF 35V.

 

 

One filter capacitor is from Jianghai, with a specification of 330μF 35V.

 

 

Magnetic loop inductor double wire wound for output filtering.

 

 

There is also a filter capacitor from Bricar, RN series small size solid state capacitor, specification of 68μF 35V, coat heat shrink tube insulation.

 

 

The front of the small board where the USB-C1 base is located is provided with a protocol chip, a synchronous buck controller, a buck MOS tube and a filter solid state capacitor.

 

 

A step-down inductor and an output VBUS switch tube are provided on the back.

 

 

Protocol chip from the chipset, model IP2736, is an internal integrated voltage reference, integrated programmable voltage/current loop control protocol chip, integrated low-end current detection, output support line loss compensation. Support optocoupler feedback of power adapter applications, support to change the output voltage through DC-DC controlled by I2C and FB, support car charger, energy storage power supply, charger, mobile power supply, power tools and other applications.

 

Thanks to the support of various feedback forms, IP2736 can be used with switching power supplies of QR, ACF, LLC and other circuit architectures for PD fast charging, and can also be used with rising and falling voltage circuits for high-power fast charging car charging and mobile power supply applications.

 

 

Detailed information of INchip IP2736.

 

 

The buck controller is from South Core Technology, the model is SC8002, South Core Technology SC8002 supports 36V input voltage, supports high-precision output current limiting, and supports dual-channel independent current limiting. Support programmable peak current limit and output power limit, switching frequency 80-600kHz can be set, chip integrated undervoltage, overvoltage, overcurrent and overheat protection, can be used for car charging, multi-port charger, USB HUB and other applications.

 

 

South core SC8002 details.

 

It is understood that the South core SC8002 is also used by vivo X Fold original 80W double C port gallium nitride flash charge, Acassis 300W portable energy storage power supply, Kexun 65W 1A1C gallium nitride fast charge, Aukey 100W gallium nitride fast charge, Momis 65W 2C1A Gallium nitride fast charge and other products.

 

 

Step-down switch tube from Ruijun Semiconductor, model RUH4040M2, is a 40V NMOS, conductive resistance 5.5mΩ, using PDFN3333 package.

 

 

The buck inductor is made of magnetic surround and insulated with heat shrink tube.

 

 

The output filter solid state capacitor from Cloud Star is 270μF 35V and is insulated with heat shrink tube.

 

 

The output VBUS switch tube is sourced from Astatine De Man, model AD30N80D3, in a 30V, 3.8mΩ, PPAK 3X3 package.

 

 

Close-up of USB-C1 base, designed for rolling edge, through hole welding, black rubber core without exposing copper.

 

 

USB-C2 step-down small board front welding protocol chip, step-down MOS tube and step-down inductor, filter solid state capacitor coat heat shrink tube insulation.

 

 

The back of the small plate is welded to the synchronous step-down controller and two VBUS switch tubes.

 

 

The other protocol chip comes from Inchip, the model is IP2726, which is a very widely used protocol chip. IP2726 is an integrated multi-protocol fast charge IC for USB output ports. Support Type-C DFP, PD2.0/3.0, PPS, QC4+, QC2.0/3.0, FCP, AFC, SCP, MTK PE+, Apple2.4A, BC1.2 and Samsung 2A protocols. With high integration and rich functions, only a few peripheral devices are needed in the application, effectively reducing the size of the overall scheme and reducing the BOM cost.

 

 

Charging head network learned that, The IP2726 has been sold by AUKEY 65W 1A1C Gallium nitride fast charger, RAVPOWER 90W double USB-C port PD fast charger, Stecker 100W double USB-C port Gallium nitride charger, McDuo 30W 1A1C USB PD Fast charger, Kunxing 18W USB PD3.0 PPS fast charger and other products are used. In addition, other series of fast charge chips from INchip have also been highly recognized by customers such as Xiaomi, Huawei, and Samsung.

 

 

The buck controller is from South Core Technology, model SC8002, for USB-C2 and USB-A port buck output.

 

 

The two step-down switch tubes are from Ruijun, model RUH4040M2.

 

 

The step-down magnetic ring inductor is insulated by heat-shrink tube.

 

 

The output filter capacitor is from Jianghai and the specification is 220μF 25V.

 

 

Two astatine German AD30N80D3 MOS tubes for output power distribution on USB-C2 and USB-A ports.

 

 

USB-C2 interface close-up, curling design, black rubber core does not expose copper.

 

 

The USB-A base is welded to a separate small board.

 

 

USB-A base positive and negative pole widening design, support high current fast charge.

 

 

Take it all apart. Get a family photo.

 

Charging head network disassembly summary

 

This gallium nitride charger from Momis has a white housing, folded pins and a cut face design. The charger is equipped with 140W fast charging port, and the maximum output power of the other two interfaces also has 100W and 30W, which is strong in overall performance, meeting the application needs of Apple multi-device party extreme fast charging, portable, multi-device fast charging at the same time.

 

It is found that the charging head network is disassembled, and the internal gluing process of the charger is processed. MPS HR1211 two-in-one high integrated main control is used with nano gallium nitride power chip, in which NV6127 is used for PFC and NV6125 is used for fixed voltage output, and the output is step-down output through two step-down circuits.

 

The output protocol chip uses INchip IP2736 and IP2726 for three-port output, and the corresponding use of South Chip Technology SC8002 synchronous buck controller for buck output. The charger uses Junkang electrolytic capacitors, Jianghai, and Parikai solid state capacitors for input and output filtering, and the overall working materials are solid and reliable.