Disassembly report: joyroom 20W 1a1c fast charging charger

Recently, the charging head network got a 20W dual port fast charging charger from joyroom, which is equipped with the popular 1a1c interface on the market. The overall volume of the product is very small, and the compatibility is also very good. In addition to supporting iPhone 12 20W PD fast charging, it also supports Huawei's SCP fast charging, which can meet the fast charging needs of major brands of mobile phones. Now we will disassemble this product to see how the materials are made.

1、 The front of the packaging box is printed with joyroom brand, charger name, appearance diagram and selling points.

The back is printed with the charger usage scene picture and the description of the selling point.

The charger is fixed and protected with plastic tray inside.

Charger overall body tends to small square, very small, fuselage shell surface matte treatment, the whole body white is very simple.

20W on one side of the waist indicates the power of charging.

The input end adopts fixed international standard pin. Charger parameters are marked on the input housing

Model: l-qp207

Input: 100-240v-50/60hz 0.8A





Manufacturer: Dongguan OPEC Electronic Technology Co., Ltd

Supervisor: Shenzhen NANTUO Energy Technology Co., Ltd

The product has passed 3C certification. The output top surface is equipped with 1a1c interface, which adopts blue rubber core and black rubber core respectively.

The height of charger body measured by vernier caliper is 36.36mm. The width is 30.81mm. The thickness is 30.8mm.

Compared with apple 20W charger, it is much smaller.

The intuitive feeling of holding it in the hand.

The net weight is about 48g.

Usb-a port measured by chargerab power-z kt002 supports apple 2.4a, Samsung 5v2a, DCP protocol, qc2.0/3.0, AFC, FCP, SCP fast charging protocol.

In addition, the usb-c port is measured by kt002, and it also supports pd3.0 fast charging protocol.
iPhone Charger Adapter
In addition, the PDO message shows that port C also has three fixed voltage gears, namely 5v3a, 9v2.22a and 12v1.67a.

2、 Disassembly of mini 20W double mouth quick charging in the mechanical music hall

The input end shell is disassembled, the pin and metal shrapnel are crimped, and then energized through the contact between the metal shrapnel and PCB board.

The input end of charger is glued and equipped with heat conduction pad.

Both high voltage filter electrolytic capacitors are Yongming kcx series, which are special products for fast charging power supply launched by Yongming in 2019. Its operating temperature range is -55 ℃ ~105 ℃, and its service life is 3000 hours. It has the advantages of lightning resistance, low leakage current (low standby power consumption), high ripple current, high frequency and low resistance.
iPhone Adapter
According to the characteristics of small volume, Yongming kcx series electrolytic capacitors are also used by bull 65W Gan charger, Philips 65W Gan fast charging socket, moms 65W 2c1a Gan fast charging charger, grapefruit 30W 1a1c fast charging charger, Jingjian 65W 1a1c Gan fast charging charger, Nubia 65W 2c1a fast charging of gallium nitride, Get the customer's unanimous approval.

The PWM master chip screen printing 710l43 is actually ob2710 of Anbao. This is a highly integrated current mode PWM controller, which is used for high performance, low standby power consumption and high cost-effective flyback switch power supply, which supports perfect protection function. On the other hand, there is a patch y capacitor, which is from Sichuan terixiang Technology Co., Ltd. with small volume and light weight. It is very suitable for the application of Gan fast charging such high-density power supply products.

Terexiang focuses on the R & D, production and sales of passive components, with a registered capital of 100million yuan. There are two types of independent capacitor brands: SMD TRX and dip ty capacitors. TRX will be committed to the research of ceramic materials to expand the application of more categories and provide more solutions for customers.


iPhone Charger Adapter

Close up of secondary synchronous rectifier controller, core Mao micro lp35118v. The core Mao micro lp35118v is packaged with sot23-6l, which is suitable for the application of isolated switch power supply; It supports forward and flyback topology, supports DCM and CCM working mode, and has super fast off speed, which can reduce switching loss in CCM working mode. At the same time, the lp35118v also has VCC power supply technology built in, which ensures that it can work normally under different output without auxiliary power supply.

Summary of dismantling charging head net

The charger is compact and simple in design, and the classic configuration of fixed pin and 1a1c interface supports multiple fast charging protocols such as QC, AFC, FCP, SCP and PD. It can meet the hot demand of iPhone 120 W fast charging, and also can be well adapted to other brands of mobile phones such as Xiaomi and Huawei.

The charging head network is understood through disassembly that PCBA module is designed with port structure, and consists of input and output board and two connecting boards, one of which is used to support usb-a bus base. The charger switch power supply consists of Anbo ob2710, high voltage MOS tube, core micro lp35118v synchronous rectifier controller and valley peak rectifier. The output end uses the silicon semiconductor xpd738 to control the output voltage of two ports. The input and output filters are carried out by Yongming kcx and NPX series small volume capacitors.