Disassembly report: Lenovo 27W USB PD fast charging charger

In the first half of this year, after Lenovo released the new Z6 pro, it attracted a lot of discussion on the Internet. The reason is that Lenovo Z6 Pro mobile phone itself supports 18W fast charging, but the standard configuration is a 27W fast charging charger, which makes many consumers mistakenly think that the mobile phone also supports 27W fast charging.

Recently, the charging head network got Lenovo's 27W USB PD fast charging charger, which is very similar to the motorcycle 27W USB PD fast charging charger disassembled before. Now let's share the detailed disassembly of this product, and let's see how the materials are used.

In addition, Lenovo's 45W power adapter ls-45wtcpd, 45W power adlx45ulcu2a, 65W power adapter adlx65ycc2a, 65W power adapter ls-65wtcqcpd, Lenovo's 65W USB PD fast charging charger adlx65ycc3a and other notebook computer chargers have also been disassembled. You can click blue to learn more.

1、 Appearance of Lenovo 27W qc4 + fast charging charger

Lenovo's 27W USB PD charger is made of pure black shell, PC flame retardant and matte finish. The charger is standard with fixed pin of national standard, and Lenovo brand logo is printed on the front.

The usb-c interface of the output end of the charger is set in the center, and the blue rubber core is adopted, the end face is free of copper, and the interface opening has chamfering treatment.

The detailed parameters of the product are printed on the pin side, the model is sc-38, and the input is 100-240V 50/60hz 0.8A; The output is 5v/3a and 9v/3a. The products have passed CCC certification and can pass the VI energy efficiency certification in the United States. The manufacturer is Xiamen Taihe Electronics Co., Ltd.

The thickness of the charger is the same as the diameter of a coin of 1 yuan.

The net weight is about 62g.

Compared with apple 18W USB PD charger, the volume is relatively thin and slightly longer.

Using chargerlab power-z kt001, the PDO gear of charger is detected, and the fixed voltage output gears 5v/3a and 9v/3a are supported, and 3-5.9v/3a and 3-11v/3a PPS voltage gears are displayed.

Meanwhile, other protocols of charger are detected, and the protocols such as apple 2.4a, DCP, qc3.0 and qc2.0 are supported.
iPhone Charger Cable
2、 Lenovo 27W qc4+ fast charging charger disassembly

Disassemble the cover plate on the side of the pin. The charger is ultrasonic welding, which is easy to disassemble, and can be directly pryed open. Two elastic pieces are used at the end of the AC pin of the charger to contact with the PCB board for conducting electricity.

After removing the AC pin cover, the internal PCB module can be seen, and the input components are fixed with silica gel.
iPhone Charger Cable
After removing the internal PCB module, a metal radiator can be seen on the inside of the charger shell and insulated with a plastic plate.

PCB front view. Three electrolytic capacitors are used in the input filter, and two solid-state capacitors are used for output filtering. The white silica gel is used to fill the gap between the primary capacitance and the transformer, which plays the role of fixing components and heat dissipation.

PCB input, common mode inductance, NTC surge suppression resistance and fuse are wrapped with black sleeve and fixed with glue injection.

Two of the three input filter electrolytic capacitors are 18 μ F 400V, between the two capacitors is a I-inductor, and a Y capacitance is set on the edge side.

The other electrolytic capacitor is 10 μ F 400V。
iPhone 12 charger cable
The specification of PWM chip power supply capacitance is 10 μ F 50V。

USB PD protocol chip is from weltrand Weixun, model wt6633p. Weixun wt6633p USB PD control chip is a few PD controllers with high pass qc4 and qc4+ test certification. USB PD physical layer is built in, type-C cable detection, built-in voltage regulator, voltage and current monitoring function and load switch control are built in; Right R005 output sampling resistance.

The charging head network has learned that there are many products including Anker 30W Gan Gan Gan charger, zMi Zimi 65W 2c1a desktop PD fast charging charger, Lenovo 65W usb-c power adapter disassembly, Xiaomi 9 Pro original 45W fast charging charger, Feihong 18W USB PD charger and other products.
iPhone 12 charger cable

The charger is completely disassembled.

Summary of dismantling charging head net

As a standard charger for mobile phones, Lenovo 27W USB PD fast charging charger is compact and simple in appearance. It is matte treated on the surface, and it is not easy to be scratched. In terms of protocol, USB pd3.0 PPS protocol can be supported, and it is compatible with apple 2.4a, qc3.0, qc2.0 and other protocols, which is practical.

The disassembly of charging head network has learned that the product adopts the latest inn3266c controller, internal integrated switch tube, controller and synchronous rectifier controller. The few peripheral devices are conducive to saving PCB position and improving power density. The secondary side adopts the high pass qc4+ certification chip wt6633p provided by Weiquan as the protocol control, and the material and workmanship of the products are quite solid, and the product performance is guaranteed.