The charging head network purchased a 105W four-port charging station launched by the Geekera brand, this charging station has a 3C1A output interface, USB-C1 interface supports 100W fast charging output, and is marked on the shell, and the remaining two USB-C ports support 20W fast charging output, USB-A port supports 18W fast charging output.
When the three ports are used at the same time, the output power of the charger is distributed according to 65+20+20W, which is also the origin of 105W power. This charging station comes with 1The 5-meter power cord is an American standard prong, which is non-detachable and non-replaceable. Let's take a look at the dismantling of Geekera's gallium nitride desktop charging station, and take a look at the materials and design inside.
The main color of the packaging box is white, with blue accents on the edges, and the front is printed with the English name, appearance, model and selling point logos such as GaN.
The back is printed with product-related parameter information.
Close-up of the parameters on the packaging box, and then introduce it to the physical link of the product.
The package contains the Geekera GaN desktop charging station PD6, a data cable, and an instruction manual.
The attached data cable is a USB-C to USB-C cable, with a regular white color scheme, rounded design on both sides of the cable head shell, high-gloss surface treatment, and a mesh tail at the end for anti-bending protection.
The length of the measured data cable is about 102cm.
Using the ChargerLab Power-Z KM003C, the cable with an E-marker chip is measured, with a power transmission capacity of 20V5A and a data transmission capacity of USB 20。
The Geekera 105W GaN desktop charging station is completely white, but it can be seen from the appearance of the box that the product is also available in black. The product comes with a power cord and is integrated with the fuselage. The fuselage is designed to lie flat, so users will not flip over for daily use.
The plug of the built-in power cord is two-pronged, no grounding treatment, and the plug is designed to be easy to plug and unplug.
The plug and pin are American spec.
The connection between the cable and the fuselage has been protected.
The Geekera 105W GaN desktop charging station body is made of PC fireproof material white shell, and the overall design style is very simple.
The bottom shell of the fuselage is printed with detailed product parameter information.
Close-up of Geekera 105W GaN desktop charging station parameters.
Model: PD6
Input: 100-240V 50 60Hz 22a max
Output: USB-C1: 5V3A, 9V3A, 12V3A, 15V3A, 20V5A (100W Max).
usb-c2/c3：5v3a、9v2.22a、12v1.67a、15v1.33a（20w max）
usb-a：4.5v5a、5v4.5a、5v3a、9v2a、12v2a（24w max）
usb-c1+usb-c2/c3：65w+20w
usb-c1+usb-a：65w+24w
usb-c2+usb-c3：20w+20w
usb-c2+usb-a：20w+24w
usb-c3+usb-a：20w
usb-c1+usb-c2+usb-c3：65w+20w+20w
usb-c1+usb-c2+usb-a：65w+20w+18w
usb-c1+（usb-c3+usb-a）：65w+20w
usb-c1+usb-c2+（usb-c3+usb-a）：65w+20w+20w
Total output: 106W Max
The products have passed the FCC certification, as well as the VI energy efficiency certification.
The bottom four ends are also equipped with raised anti-slip pads, which are anti-slip and avoid wear and tear of bottom parameter information.
The output of the fuselage is equipped with indicator lights and three 3C1A four USB interfaces, and the corresponding power parameters are printed next to the interface, which is convenient for users to use.
The measured length of the power cord is about 15 meters.
The Geekera 105W GaN desktop charging station has a body length of 8433mm。
The width is 6588mm。
The height is 329mm。
Compared with Apple's 96W charger, this body is even smaller.
The size of the product body in the hand is intuitively felt.
In addition, the total weight of the product was measured to be about 318g.
When powered on, the indicator lights up blue.
The USB-C1 port supports FCP, SCP, AFC, and QC3 as measured by using the ChargerLab Power-Z KM003C0/5、sfcp、pd3.0、pps、dcp、sam 2a、apple 2.4A charging protocol.
In addition, it also has five sets of fixed voltage ranges of 5V3A, 9V3A, 12V3A, 15V3A, and 20V5A, as well as 33-21V5A set of PPS voltage ranges.
It is measured that the USB-C2 port supports FCP, SCP, AFC, QC30/4+、sfcp、pd3.0、pps、dcp、sam 2a、apple 2.4A charging protocol.
And it has 5v3a, 9v222a、12v1.67a、15v1.33A four sets of fixed voltage ranges, and 33-5.9v3a、3.3-11V2A two sets of PPS voltage ranges.
The compatible protocol of the USB-C3 port is the same as that of the USB-C2 port.
In addition, PDO packets are the same, with the same output performance of USB-C2 and USB-C3 ports, and support power blind mating.
Finally, it was measured that the USB-A port supports FCP, SCP, AFC, QC30、sfcp、dcp、sam 2a、apple 2.4A charging protocol.
After reading the appearance display and protocol test of Geekera's charger, let's disassemble it and take a look at the internal materials and design.
First, disassemble the charger housing along the housing seams.
The power supply wires are connected to the PCBA module by soldering.
The PCBA module is fixed by a slot inside the housing.
Remove the PCBA module from the inside of the housing.
The front of the PCBA module is soldered and fixed with a brass heat sink.
The back is likewise covered with a brass heatsink.
The length of the PCBA module measured by vernier calipers is about 794mm。
The width of the PCBA module is about 601mm。
The thickness of the PCBA module is about 277mm。
Solder to remove the heat sink on the surface of the PCBA module.
The PCBA module is equipped with a small plate on the side, a welded rectifier bridge, and a common mode inductance.
The step-down plate at the output end is insulated with Mylar sheets, and the corresponding transformer position is coated with thermal conductive adhesive for heat dissipation.
Solder and remove the heat sink on the back of the PCBA module, and hollow out the position of the thermal pad corresponding to the Y capacitor of the patch to reduce the thickness.
The front view of the PCBA module, the upper left corner is welded with NTC thermistor, fuse, and common mode inductor. The upper plate is welded with common mode inductors and rectifier bridges, and the lower part is welded with high-voltage filter capacitors and transformers. The right side is welded to output the filter capacitor, and the upper side outputs the step-down plate.
The back of the PCBA module is welded with the GaN main control chip, the GaN power chip, the feedback optocoupler, the SMD Y capacitor, and two synchronous rectifier tubes are welded in the upper right corner.
Through the observation of the PCBA module, it is found that the Geekera charger adopts a flyback switching power supply architecture, using onsemi NCP1342 main control chip and Navitas NV6127 gallium nitride power chip, synchronous rectification, and fixed voltage output. The output is through three independent synchronous step-down circuits to realize the four-port fast charging output and automatic power distribution function. Let's start with the input to understand the design and materials of this charger.
The input of the PCBA module is welded with NTC thermistors, fuses, common mode inductors, and high-voltage filter capacitors.
The input fuse is 4A 250V.
NTC thermistors are used to suppress inrush currents at power-up.
Common mode inductors are wound with enameled wire and insulated wire.
The side of the PCBA module is welded with the output step-down board and the rectifier bridge board, and the output step-down board and the high-voltage filter capacitor are insulated by Mylar sheets.
The front of the small board is welded with safety x2 capacitors and common mode inductors.
Two rectifier bridges are welded on the back.
The safety x2 capacitor comes from Dongguan Chengxi, with a capacity of 022μf。
Common mode inductors are wound with flat copper wire.
The two rectifier bridges are from Pingwei, model TBM810, the specification is 8A 1000V, and the half-bridge connection is evenly distributed and heated.
The side of the PCBA module is welded with high-voltage filter capacitors, transformers, and output filter capacitors.
Close-up of high-voltage filter capacitors, six of which are 33 F400V.
The other is 22 F400V. The total capacity of the filter capacitor is 220 F.
The main control chip adopts onsemi NCP1342, which is a high-frequency flyback quasi-resonant primary PWM controller, with built-in active X2 capacitor discharge, support for a wide range of VCC power supply, support for external thermistor for overheating protection and multiple perfect protection functions.
Navitas NV6127 is used for the switch tube, which integrates a GaN switch tube, GaN driver, and logic circuitry for easy application. The NV6127 is available in QFN6*8mm package, with upgraded thermal performance, 125M conduction resistance, and a built-in driver that supports 10-30V power supply. It supports up to 2MHz switching frequency.
The filter capacitor that supplies power to the main control chip is 10 F50V.
The transformer core is tightly wound and insulated with adhesive 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. The part number is TMY1102M.
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 Baseus Qualcomm QC5 certified 100 gallium nitride fast charging, Maiduoduo 100W gallium nitride, OPPO 65W super flash charge 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., can also be applied to 20W mini fast charging of brands such as Hailutong, First Guard, Belkin and other brands, and the performance has been unanimously recognized by customers.
The blue plug-in Y capacitor is from JNC Jiane.
Everlight EL1018 optocoupler is used for output voltage feedback.
Two synchronous rectifier tubes are from Wei'an, model WMB072N12LG2, NMOS withstand voltage 120V, conduction resistance 54M in a PDFN5060-8L package.
The two output filter capacitors are rated at 820 F25V.
At the output, a step-down board and an MCU for automatic power control are welded along with an LED indicator.
Close-up of the front and back of the buck board for USB-C1 and C2 interfaces, one side of which is welded with buck inductors and filter capacitors, and the other side is welded with buck controller, buck switch and VBUS switch.
The step-down protocol IC adopts Zhirong SW3516P, which is a highly integrated multi-fast charging protocol dual-port charging chip, which supports fast charging output of any port of A+C port, supports independent current limiting of dual ports, and the parameters and specifications are the same as those of Zhirong SW3516H.
The 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, etc., with a maximum output of PD 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.
Smart Fusion SW3516P details.
According to the dismantling of the charging head network, the Zhirong SW3516P has also been used in products such as the Shanji 100W 3C1A GaN charger, the Bull 67W 3C1A Mountain Peak Safety Fast Charging Socket, the Meizu Pandaer 67W 2C1A GaN Gearbox Tide Charger, and the 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 MOS transistor of the synchronous step-down circuit comes from Zhirong Technology, silk-screen SWT40N45.
Step-down inductor jacket heat shrink tube insulation.
The filter capacitor specification is 100 F25V.
The VBUS switch tube adopts Xinjieneng NCEP3065QU, NMOS, withstand voltage 30V, and conduction resistance 19m with DFN33*3.3 packages.
The USB-C receptacle is fixed by via soldering, and the orange rubber core does not expose copper.
The other small board is used for the buck output of USB-C3 and USB-A ports, and two filter capacitors and buck inductors are welded on the front.
On the other side, the buck controller, buck switch and VBUS switch are welded.
The step-down chip adopts Zhirong Technology SW3516P.
The MOS transistor of the synchronous step-down circuit comes from Zhirong Technology, silk-screen SWT40N45.
The step-down inductor is made of magnetic surrounding, and the jacket is insulated by heat shrinkable tubes.
Both filter capacitors are rated at 150 F25V.
The new CICE NCEP3065QU is used for USB-C port VBUS control.
The other one is used for USB-A port VBUS control.
USB-C receptacle is soldered and fixed via hole.
The USB-A receptacle is fixed by via soldering.
Resistor and capacitive components are welded on the back of the small board.
The positive and negative poles of the USB-A female connector are widened to support high-current fast charging.
An unstandard MCU is used for automatic power distribution control.
White LEDs are used for power indication.
A list of all dismantling and a family photo.
Geekera's 105W four-port charging station comes with 1The 5-meter-long power cord is equipped with American standard pins, compatible with national standard pins, and can be used normally in China. This charging station is equipped with a 3C1A output interface, of which the USB-C1 interface supports 100W output, and the USB-C2 and USB-C3 ports support 20W output, which can be used to charge mobile phones and laptops at the same time.
Through the dismantling of the charging head network, it was learned that the PCBA module inside the charging station is covered with brass heat sink as a whole, the transformer is coated with thermal conductive glue, and the heating element is dissipated through the thermal pad. The switching power supply uses onsemi NCP1342 with Navitas NV6127 gallium nitride power chip, fixed voltage output, and uses three intelligent fusion SW3516P corresponding to four outputs. The internal components are glued and reinforced, and are insulated with Mylar sheets, and the workmanship and materials are solid.