Preface
The charging head network got a 140W gallium nitride desktop charger launched by Lidenuo, which is equipped with an extension cable and replaceable pins, which supports desktop use and portable use to meet the needs of different scenarios. The charger is equipped with a 3C3A fast charging interface, the maximum output power of the USB-C interface is 100W, any USB-C port supports 100W output, the USB-A port supports 30W fast charging, and supports automatic power distribution.
The charger also comes with a digital display that shows the charging power of each interface in real time. And there is also a power switch, which can control the global output, eliminating the trouble of plugging and unplugging cables. The following charging head network will bring the dismantling of Lidenuo's 140W gallium nitride desktop charger, and take a look at the internal solutions and materials.
Lideno 140W GaN desktop charger unboxing
In addition to the LDNIO brand, product appearance, model and characteristic logo printed on the front of the box, the lower left corner is also printed with the appearance of three kinds of prongs and power cord plugs of national standard, British and European standards, which can be seen that the product can be used in China and Europe and other regions by replacing the pins.
The back is also printed with an illustration of the product replacement pins and the application scenario of charging a laptop, tablet, Switch and three mobile phones at the same time, which can be said to be quite powerful.
The detailed parameter information of this desktop charger is also printed in the lower left corner of the back, and it will be introduced to the physical part of the product below.
The package includes the charger, pins, power cord and data cable.
The included data cable is a USB-C to USB-C braided cable, with a concave and convex texture on the cable head shell for easy plugging and unplugging, and an integrated mesh tail at the end for anti-bending protection.
In addition, the design of the woven outerwear is also very distinctive, which adds a hard plastic string to bind, which effectively avoids the problem of easy fluffing of the outerwear, and at the same time improves the appearance and feel.
The length of the measured data cable is about 99cm.
In addition, the ChargerLAB POWER-Z KM003C cable with E-Marker chip is used, the data transmission capability is USB 2.0, the power transmission capacity is 50V5A, and it supports USB PD3.1 240W fast charging. The charging performance is in place in one step, allowing users to avoid the trouble of purchasing another cable.
The design of the attached power cord is also very clever, and the input terminal is designed with a snap fixing device, which can be used at this end of the power cord by removing the prongs from the charger body, which can effectively reduce the user's take-out cost.
The module is equipped with a sliding trip plate, and is designed with the word PUSH and the corresponding arrow prompt.
There is a groove on the edge of the module at the other end of the power cord to facilitate the separation of the cable from the charger body.
The end-to-end length of the power cord is measured to be approximately 156 cm.
The attached GB, UK, and EU pins are all flat and detachable, and the edges of the modules are also designed with grooves for easy removal. Among them, the European prongs are directly installed on the charger.
The charger is made of PC gang black shell, the body shell is matte, and the corners are rounded.
The front of the fuselage is printed with the LDNIO brand and the words 140W GaN.
The back is printed with the detailed parameter information of the charger.
Close-up of product parameters
输入：100-240V~50/60Hz 2.5A Max
Output:
USB-C1/2/3：5V3A、9V3A、12V3A、15V3A、20V5A 100W MAX
PPS：3.3-21V5A
USB-A1/2/3：4.5V5A、5V4.5A、5V3A、9V3A、12V2.5A、20V1.5A 30W MAX
USB-C1+USB-C2+USB-C3：65W+45W+30W（140W MAX）
Total output: 140W MAX
The products have passed CE and FCC certification.
The input terminal of the fuselage is equipped with European pins.
In addition, it also has the same buckle structure design as the power cord input module, which can effectively avoid the non-artificial separation of the fuselage and the plug pins and ensure the use experience of the charging process.
As a desktop charger, it is not only equipped with 3A3C six USB ports, but also has a digital display screen that can display the output power of each interface in real time.
There is a digital display screen wake-up button in the lower left corner of the output end.
As shown in the figure, press the button to wake up the digital display screen when the charger is powered on, which can display the output power of each interface in real time, and whether each interface is fast charging or not is clear at a glance.
The measured length of the charger body is 111.88mm.
The height is 89.99mm.
The thickness is 33.94mm.
Compared with Apple's 140W GaN charger, Lideno is slightly larger.
The size of the product in the hand is intuitively felt.
In addition, the weight of the charger was measured to be about 270g.
The USB-C1 port is measured by ChargerLAB POWER-Z KM003C, which supports FCP, SCP, AFC, QC3.0/5, SFCP, PD3.0, PPS, DCP, and Apple 2.4A charging protocols.
PDO报文显示C1口还具备5V3A、9V3A、12V3A、15V3A、20V5A五组固定电压档位，以及3.3-21V5A一组PPS电压档位。
It is measured that the USB-C2 port is compatible with the same protocol as the USB-C1 port.
In addition, PDO packets are exactly the same.
The USB-C3 port is also compatible with the same protocol.
The same applies to PDO messages. That is, the single-port output performance of the three interfaces USB-C1, USB-C2 and USB-C3 is the same, and it supports power blind plugging.
The USB-A1 port supports FCP, SCP, AFC, QC3.0, SFCP, DCP, and Apple 2.4A charging protocols.
It is measured that the USB-A2 port is compatible with the same protocol.
The USB-A3 port is also compatible with the protocol, and the three USB-A ports also support single-port blind plugging.
Lideno 140W GaN desktop charger disassembly
After reading the appearance and test of this GaN desktop charger, let's disassemble it and take a look at the internal solutions and materials.
First, disassemble the charger housing along the housing seams.
The replaceable pin module is powered by a shrapnel crimp to the PCB.
The PCBA module is fixed by slotting inside the housing.
Remove the PCBA module from the inside of the housing.
The PCBA module is equipped with a heat sink to dissipate heat for the rectifier bridge and switch tube. Below the heat sink there is a filter capacitor and a transformer.
The output side is equipped with a small plate, and the output socket and digital display screen are welded.
The length of the PCBA module is about 104.5mm measured by vernier calipers.
The width of the PCBA module is 77.2mm.
The thickness of the PCBA module is about 27mm.
Front view of the PCBA module, fuse, rectifier bridge and NTC thermistor soldered on the bottom, high-voltage filter capacitor and transformer soldered under the heat sink. The right side is welded with a synchronous rectifier tube to filter the solid-state capacitor, and the upper side is welded with the step-down inductor and the output filter capacitor.
A glance at the back of the PCBA module, soldering the primary main control chip, synchronous rectifier controller, SMD Y capacitor and feedback optocoupler. The synchronous step-down switch and the output plate are welded above.
Through the observation of the PCBA module, it is found that this 140W GaN charger adopts a flyback switching power supply design, with synchronous rectification and fixed voltage output. The output adopts four independent step-down circuits to realize the six-port fast charging output and automatic power distribution function. Let's start with the input to understand the information of each device.
The input of the PCBA module is welded with a fuse, a rectifier bridge and an NTC thermistor.
The input fuse specification is 5A 250V.
Fix the primary switch tube and rectifier bridge on the heat sink.
The rectifier bridge model is GBU1010, and the specification is 1000V 10A.
NTC thermistors are used to suppress inrush currents when the charger is powered up.
A high-voltage filter capacitor is provided under the heat sink.
The two high-voltage filter capacitors are KSC brand, and the specification is 100μF 400V.
The main control chip of the switching power supply adopts Marui Xin MK2697, which is a QR PWM controller optimized for PD/fast charging applications. The controller's wide VCC operating voltage range (9V-90V) allows it to cover the PD/PPS output range from 3.3V-23V without the need for additional auxiliary windings or linear step-down circuitry.
The MK2697 adopts Maurexin's proprietary drive technology to simultaneously optimize the voltage stress of the primary and secondary power tubes. The operating frequency is up to 200kHz, and it supports the design of PD fast charging source with high frequency and small size.
For energy efficiency requirements, the MK2697 adopts adaptive multi-mode due to the multiple output voltages of PD/fast charging. It adjusts the QR mode to work at different frequencies under different loads and different outputs. At light loads, it will work in burst mode to improve efficiency.
MK2697 provides comprehensive protection functions, including output OVP, OPP, VCC, OVP, BROWN-IN/OUT, secondary SR short circuit protection, PIN OPEN/SHORT protection and other rich protection functions.
According to the dismantling of the charging head network, the Morui fast charging solution is also used in ISA Watt 65W 2A1C gallium nitride fast charging, Baseus QC5 100W gallium nitride charger, REMAX 20W 1A1C fast charging charger, air-J 18W 1A1C fast charging charger, Nokia 20W PD fast charging, Hailutong 20W PD fast charging, Damai 20W PD fast charging and other products.
The filter capacitor that powers the main control chip comes from Deco Electronics.
The specification is 10μF 50V.
The gallium nitride switch is from Nenghua, model CE65H110TOAI, is a depletion cascade device, withstand voltage 650V, conduction resistance 110mΩ, and adopts TO220 package.
Two 250mΩ sampling resistors are used for primary current sensing.
The transformer is made of PQ3220 magnetic core, which is tightly wound and insulated with tape.
SMD Y capacitors from Sichuan Teruixiang Technology Co., Ltd. have the characteristics of small size and light weight, which are very suitable for high-density power products such as gallium nitride fast charging, with a TMY1222M part number.
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.
The charging head network learned that in addition to being used by dozens of high-power chargers such as Maiduoduo 100W gallium nitride, OPPO 65W super flash charging gallium nitride charger, Lenovo 90W gallium nitride fast charging, Nubia 65W gallium nitride charger, Baseus 120W gallium nitride + silicon carbide PD fast charging charger, etc., it can also be applied to 20W mini fast charging of brands such as Hailutong, First Guard, Belkin, etc., and its performance has been unanimously recognized by customers.
A blue Y capacitor comes from Duffs.
Orient OR 357 optocouplers are used for output voltage feedback.
The synchronous rectifier chip is from Murray, model number MK91816, supports flyback topology applications, and is compatible with CCM, DCM and QR working modes. The chip uses self-power supply technology with independent intellectual property rights to supply power to VCC, which can be directly placed on the front end of the application without auxiliary winding.
MK91816's 10nS shutdown delay and up to 4A pull-down current help the system operate reliably in CCM mode. Its proprietary turn-on and turn-off mechanism maximizes the on-time of the external MOSFET to achieve the highest possible efficiency. In addition, the DCM ringing is detected independently to prevent false start-up.
Morion MK91816 Profile Information.
The side of the PCBA module is provided with a heat sink of the synchronous rectifier tube.
The synchronous rectifier tube is fixed to the heat sink using screws.
The synchronous rectifier tube is from Lingtai Semiconductor, silkscreen S0111, and is in TO220 package.
The two output filter capacitors are from Hunan Shengtong, E2 series solid-state capacitors, with a specification of 1000μF25V.
The two electrolytic capacitors are from Deco Electronics, and the specification is 100μF35V.
On the output side, there is a power display screen and a USB interface, and the digital display corresponds to each interface.
The power switch is welded through the hole.
There is a cable on the output board for connecting the power display screen.
The other end of the cable is connected to the power display screen.
Remove the power display screen.
The power display screen is fixed on a plastic stand.
The plastic bracket is equipped with a snap to secure the PCB.
Take out the display screen PCB, and the display grille is fixed by hot melting.
The output board is soldered to the PCBA module.
Solder and remove the output board, and solder an MCU, USB-C receptacle and USB-A receptacle, and a VBUS switch on the front of the board.
Four buck protocol chips and a VBUS switch are welded on the back of the board.
The step-down protocol IC of the three USB-C interfaces adopts the Zhirong SW3516P, which is a highly integrated multi-fast charging protocol dual-port charging chip, which supports the fast charging output of any port of the A+C port, and supports the independent current limit of the dual ports, and the parameters and specifications are the same as those of the Zhirong SW3516H.
SW3516P integrates a 5A high-efficiency synchronous step-down converter. It supports multiple fast charging protocols such as PPS/PD/QC/AFC/FCP/SCP/PE/SFCP, with a maximum output PD of 100W, CC/CV mode, and dual-port management logic. Only a small number of peripheral components are needed to form a complete high-performance multi-fast charging protocol dual-port charging solution.
Zhirong SW3516P details.
According to the dismantling of the charging head network, Zhirong SW3516P has also been used in products such as Shanji 100W 3C1A GaN charger, Bull 67W 3C1A Mountain Peak Safety Fast Charging Socket, Meizu PANDAER 67W 2C1A GaN Gearbox Tide Charge, and Greenlink MFM Certified 100W 2-in-1 GaN Charging Station, and the performance and quality of the chip have been unanimously recognized by customers.
The buck protocol chip used for the USB-A port also adopts the Zhirong SW3516P.
Close-up of six synchronous buck switches for three USB-C ports.
The synchronous step-down switch comes from the core control source, model AGM303A, NMOS, withstand voltage 30V, conduction resistance 2.7mΩ, and adopts DFN5*6 package.
The synchronous step-down switch for the USB-A port is from Quanli, model AP90N03Q, NMOS, withstand voltage 30V, conduction resistance 4.2mΩ, and adopts PPAK3*3 package.
The four buck inductors correspond to four buck outputs.
The output filter capacitor comes from Shengtong, E2 series solid-state capacitor, the specification is 330μF25V, and four corresponding to four output filters.
VBUS switch tube silk screen 3810, which is a double NMOS tube.
The other VBUS switch is of the same type.
The USB-C receptacle is fixed by via soldering, and the blue rubber core does not expose copper.
Close-up of three USB-A female connectors, using orange rubber cores, and widening the positive and negative poles to support high-current fast charging.
The MCU for screen display and automatic power control is from Chipsea Technology, with a CSU38M20 model and a built-in high-performance 8-bit MCU with a built-in 12-bit ADC, built-in 8K× 16-bit program memory MTP, 1K byte data memory (SRAM), 256-byte E2PROM, only 43 single-word instructions, and 8-level PUSH and POP memory stacks. I2C, SPI and UART interfaces.
Chipsea Technology CSU38M20 Profile.
A list of all dismantling and a family photo.
Summary of the dismantling of the charging head network
The 140 GaN charger comes with an extension cable and replaceable pins for use as a desktop charger and daily portability. The charger is equipped with an LED screen that can display the real-time output power of the current interface, which is convenient to know the charging status of the device. The charger's three USB-C ports all support 100W power output, and the USB-A port supports 30W fast charging, which can meet the needs of mobile phones and computers for fast charging at the same time.
Through the dismantling of the charging head network, it was learned that the 140W GaN charger of Lideno adopts the Maoruixin switching power supply scheme, uses the MK2697 primary main control chip + MK91816 synchronous rectifier controller, and uses the Neng Hua CE65H110TOAI GaN switch tube to form a flyback switching power supply with fixed voltage output.
The output uses four intelligent financial SW3516P for step-down output, three of which are used for three USB-C ports and one USB-A port, and one for two USB-A ports. The charger uses Shengtong solid-state capacitors for output filtering, and Xinhai Technology CSU38M20 for reading output power and display driver. The internal switch tube of the charger is equipped with a large-area heat sink, and the transformer and other components are glued and reinforced, leaving a gap between the components to improve the heat dissipation performance.