Disassembly report: Queenno Qingke Mini 45W fast charger gd45c1

Recently, the charging head network got a mini 45W fast charging charger from Queenno Qingke. The charger looks very compact and compact. The power density of the charger can be calculated as 0.77w/cm through 3D ³, It can basically compare with the conventional Gan charger and reach the leading level in the industry.

In addition, the charger is equipped with a button at the input end, and the folding pin can be ejected for use with a slight press. The design is very novel, and the user can use it conveniently and simply. Next, the charging head network is disassembled in detail to see how the charger is designed.

1、 Appearance of Qingke 45W Mini charger


The charger appearance is printed on the front of the box.


The back is printed with business information, in addition to the production date sticker. The side is printed with product parameter information.

The package contains charger and instruction manual.

This charger adopts long column shape design, the overall style is very simple. In addition to the input shell matte, the rest of the surface are bright design. The transition between the sides of the waist is mellow, and the use does not hurt the hand. Overall, the design is very small, very novel, very textural, people can't put it down.

The Queenno brand logo is printed on one side.

The input shell of the charger is printed with parameter information, and a round button is set in the center.

Model: gd45c1

Input: 100-240V ~ 50 / 60Hz 1.5A

Output: 5v3a, 9v3a, 12v3a, 15v3a, 20v2.25a, 45W Max

Products have passed CE, KC, UL, CCC, PSE certification.

Manufacturer: Shenzhen lianxunfa Technology Co., Ltd

Supervised by: Shenzhen Qingke Technology Co., Ltd

The product has passed 3C certification and VI level energy efficiency certification. There is no warning sign on the charger product name plate for use in non tropical areas, which proves that the charger can be used in tropical areas, and the working environment temperature can reach 40 ℃.


The folding pin of GB can be ejected by pressing the button, which is a very novel design.

The usb-c port on the top of the output is designed by the side, and the rubber core and button are all in cyan color matching, which echoes with the brand.

The measured length of charger body is 60.66mm by vernier caliper.

The width is 30.9mm.


The thickness is 30.97mm.


Compared with apple 30W charger and 61W charger, the volume advantage is obvious.

The intuitive feeling of holding it in the hand. The net weight of the charger is about 77g.

Using chargerlab power-z kt002 to detect the usb-c port output protocol, the display supports apple 2.4a, Samsung 5v2a and DCP protocols, as well as qc2.0 / 3.0, AFC, FCP, SCP and pd3.0 fast charging protocols.


In addition, the PDO message shows that the C port also has five groups of fixed voltage gears: 5v3a, 9v3a, 12v3a, 15v3a and 20v2.25a.


2、 Disassembly of Qingke 45W Mini charger


The input end shell is disassembled, and the PCB board is provided with two protruding pins, which are used to contact and power on the metal spring piece at the pin end.


The charger is equipped with U-shaped brass fin to help heat dissipation, and the fin is fixed by soldering with the motherboard.


The PCBA module is wrapped with insulating tape for isolation from the brass heat sink. The magnetic core of the planar transformer is coated with glue to conduct heat in contact with the brass heat sink.


At the front of PCB board, there is a small plane transformer board on the left side, a large capacitor in the middle of the right side, and a small board at the input end.


The rectifier bridge, optocoupler and protocol chip are welded on the back of the main board, and the corresponding transformer on the right side of the board is hollowed out to reduce the thickness of the body and increase the space utilization. At the input end, there are no components on the back of the small board.

The front of the small board is equipped with fuse, common mode inductor, X capacitor and filter inductor.

Close up of time delay fuse, specification 2A 250V.

The common mode inductor is wound in two wires to Filter EMI interference.

At the side of the main board, the high-voltage filter electrolytic capacitor is transversely placed, with an insulating tube to isolate from the output solid-state capacitor, and there is a gap between the main board and the high-voltage filter electrolytic capacitor, which is fixed with glue.

After removing the components, you can see that the front of the motherboard is also equipped with the charger master chip and the output VBUS switch tube.

According to the charging head network, the products using wt6636f include Meizu 65W 2c1a Gan charger, lvlian 65W Gan USB PD fast charger, Xiaomi 65W USB PD fast charger, ravpower 30W Gan charger, Zimi 65W USB PD Mini charger, ThinkPlus USB PD charger and zMi Zimi 65W 2c1a desktop PD fast charger. At the same time, there are dozens of fast charging products using Weiquan chips.

Summary of dismantling charging head net

Qingke Mini 45W charger adopts long column shape design, and is equipped with foldable pins. The overall volume is small, and it is very convenient to carry out. In addition, the pin adopts the button pop-up design, which is more convenient to use. In terms of performance, the charger supports multiple fast charging protocols of QC, AFC, FCP, SCP and PD, with a maximum output of 45W, which can meet the fast charging requirements of devices such as pen, tablet and mobile phone.

 iPhone Charger Adapter

Through the disassembly of the charging head network, we know that the input end of the charger is equipped with a small board, and the input filter components are welded to increase the space utilization. In addition, the use of planar transformer, greatly saving the charger internal space.

 iPhone Charger Cable

The product adopts Infineon's latest xdps21071 multi-mode digital ZVS zero voltage flyback scheme, which is used to reduce the resonance voltage of the main circuit, reduce the switching loss and optimize the system volume, so that the charger volume can be comparable to that of Gan charger.


In addition to the main control IC, the main switch, synchronous rectifier and output VBUS switch are all from Infineon; Protocol chip adopts Weiquan wt6636f, has passed USB pd3.0 certification, Fengbin electrolytic capacitor filter, the overall materials and workmanship are very exquisite.