Violent dismantling of an 18W fast charging charger

After years of development, the popularity of USB PD fast charging has come. Apple has released a total of nine 18 w USB PD fast charging iPhone models in three years, which has completely opened the 18 w PD fast charging charger market. Recently, the charging head network has got an 18W USB PD fast charging charger launched by wiz Weizhi life, which is not only compact and portable, but also compatible with a variety of fast charging protocols. Let's share the internal structure and materials of this product.

1、 Appearance of Weizhi life 18W PD fast charging charger

Weizhi life 18W USB PD fast charging charger is packaged in pure white, with the appearance picture and brand printed on the front.

The information of manufacturer and product parameters is printed on the back of the box in traditional Chinese.

The charger body is flat oval, made of white PC material, painted with bright surface, printed with the word power Qube on the front, and the input end is equipped with fixed GB pins.

On the other side, the logo of wiz is printed in the middle.

Detailed parameter information is printed on the pin side of the charger. Product model: wiz-p1801cn, input: 100-240V ~ 50 / 60Hz, 0.6A max; output: 5V / 3a, 9V / 2a, 12V / 1.5A, total power: 18W. The product has passed CCC and ROHS certification. The manufacturer is Shenzhen Zhongxian Innovation Technology Co., Ltd., supervised by Shenzhen Weizhi Communication Co., Ltd.

A usb-c interface is set in the middle of the output end, with a built-in black rubber core.

Compared with Apple's 18W charger, Weizhi life's charger is more flat and lighter. Weizhisheng 18W USB PD fast charging charger has a net weight of about 54G.

The output protocol of this charger is detected by chargerlab power-z kt001, and the display supports apple 2.4a, USB DCP, qc3.0, FCP, etc.

It can be seen from the PDO message that this charger also supports USB pd3.0 fast charging standard, with three voltage ranges of 5V / 3a, 9V / 2a and 12V / 1.5A.

2、 Dismantling of Weizhi life 18W PD fast charging charger

First, open the shell from the pin side of the charger. It can be seen that the inner wall of the shell is provided with a slot to fix the PCBA module. The pin and the PCBA module are connected through two metal clip holders, and a delay fuse is set in the middle.

When the internal PCBA module is taken out, the number of plug-in components on the front is very simple. There is glue injection treatment between three input filter electrolytic capacitors and I-shaped inductors. The transformer is wrapped with yellow Marla tape, and there is a primary control MOS tube beside it.

From the output point of view, the usb-c interface is vertically installed on the main PCB with a small PCB board. A solid-state capacitor is used to output the filter on the left side, and a welding position of solid-state capacitor is reserved on the right side. The output line of the transformer adopts multi-layer insulation line, and the bottom is coated with silica gel for reinforcement.

The specification of time delay fuse is 3.15a 250V. The product code information is printed on the top of the transformer.

The input end is three electrolytic capacitors parallel filter, the specification is 400V 10 μ F. Across the primary and secondary between a blue y capacitor, brand JEC Zhixu electronics.

Output filter solid-state capacitor from Yangzhou Shengyang electronics, 16V 470 μ F.

The fast charging protocol chip of usb-c interface adopts the Intel ip2712. This is an integrated USB type-C output protocol, USB pd2.0, USB pd3.0 output protocol, qc3.0/2.0 fast charging output protocol, apple Samsung automatic identification, SCP, FCP, MTK PE and other multi protocol, multi-functional power management SOC, which provides multi protocol solutions for adapter, car charging and other type-C output applications, and can be flexibly configured according to the use environment.

Summary of dismantling charging head net

Weizhi life 18W USB PD fast charging charger adopts pure white shell, flat oval appearance and single port usb-c output. It not only supports USB PD fast charging protocol, but also is compatible with apple 2.4a, qc3.0, FCP and other protocols, which can meet the basic fast charging requirements of most mobile phones in the market.

Through the disassembly of the charging head network, we learned that the structure design of the whole PCBA for charging is simple, with built-in IC ip2712 fast charging protocol chip, which has passed the certification of USB if Association and has stable compatibility. The primary PWM main control adopts rt7737gge, which is compact and saves PCB board space. The secondary synchronous rectifier chip has built-in MOS tube, which has the characteristics of high integration.