I. Introduction
Just a year ago, QC3.0 fast charge and USB PD fast charge with the same flood of water, what exactly happened this year? Previously, USB-IF released an important update of USB PD 3.0, USB PD3.0 under PPS successfully completed the QC4, SCP, VOOC and other major fast charge agreement incorporated.
Why do these mainstream fast charge protocol USB PD3.0 move closer?
First of all, USB PD unified Type-C physical interface, compared to the MicroUSB interface can transmit more power, up to 100W; smaller than the USB-A interface smaller, in line with the electronic devices to smaller and thinner trend ; Support positive and negative plug is also Type-C interface advantages.
Second, the USB PD supports voltage ranges from 5V to 20V and power from 5W to 100W. For mobile phones, handhelds, tablets, notebooks, monitors, etc., using the USB PD charger can power the above devices and bring no Compared to the convenience.
At present, USB8 / 8Plus / X, Huawei Mate10 / Mate9, millet 6, SWITCH game consoles, iPad Pro, Macbook, Dell notebooks, Acer monitors and so on to support the USB PD power supply.
Taking into account the currently available USB PD charger on the market to the majority of notebooks, power more than 45W, 60W above, and to the new Macbook, mobile phones, tablet PD charger to use the best 30W, small size, power foot , easy to carry.
Just this type of charger on the market and more rare, charging head network special collection of 4 30W power USB PD charger, respectively, Apple 29W, Dell 30W, SIMPTUNE 30W, Lightning Wolf 30W.
Apple 29W charger is Apple MacBook standard charger, Apple Store can buy the cheapest USB PD charger since the iPhone8 was exposed to support USB PD fast charge, this charger will be concerned about.
Dell 30W Charger DELL's four USB PD Chargers in the smallest one, designed for XPS12, XPS13 and other low-power notebook use.
SIMPTUNE USB PD adapter introduced, the appearance looks like ordinary mobile fast chargers, the power can reach 30W, astonishing.
Lightning Wolf 30W is a USB PD charger for foreign users, the use of European regulations pins, spent a lot of effort to get it.
Second, disassemble to see the inner beauty
1, Apple 29W
Printed on the white carton packaging product style, the upper right corner you can see the words USB-C 29W.
Plain back of the box with multi-language written This USB-C power adapter supports 29W power output, the lower right corner is HK $ 388 pricing tag.
Apple USA California design, Made in China. Model A1540, SN Serial Number C4H716402KXG2VCBH.
Open the transparent easy-to-tear seal can pull out the product.
Out of the box at a glance, manual, user guide, power adapter body, positioning tray.
Plug removable design, easy to carry storage, power adapter + plug a total weight of 132g.
The appearance of the product is similar to that of the previous apple power adapter products, both of which are designed with a circular arc side, and the width * length is 56mm * 56mm.
Thickness of 28 mm.
Plug removed, you can replace the plug with a different pin, but also easy to travel admission.After removing the plug you can see inside is our common single-tooth two-legged 8 word line socket, the outside is to act as a ground T-type fixed seat, With 8-word line can also be used to insert, but not grounded This feature is not recommended.
The bottom of the 8-word socket is printed with the SN code: C4H71640KXG2VCBH, which matches the SN code on the packaging box.
Test articles
We use the Power-Z KM001 USB PD Tester with PD trick to PD detection of this power adapter, you can see on the Power-Z screen, this power adapter supports a total of two outputs, namely, 5V2.4A And 14.8V2.0A, and the product side of the nameplate information 5V2.4A and 14.8V2.0A consistent.
Then we use the Power-Z FL001 USB PD tester to do the maximum load test on this power adapter. The maximum output of the 5V file is 4.91V2.8A and the power is 13.8W. At this time, the input power is 16.3W.
14.8V voltage file maximum output 14.76V2.3A, power 34W, this time the input power of 36W.
Apple 29W USB-C PD power adapter shell is very solid, with good toughness of the gum with no way to open the shell, pry the T-mount can be seen behind the ground wire.
After removing the shell, product disassembly structure list
Product Disassembly Structure List
In the transformer above a piece of thermal copper, copper has a small piece of black is a flexible thermal pad, the entire piece of copper wrapped with high temperature insulation tape.
Inside the parts can be seen as 3 parts, ground pin panel, 8 word line socket, the main PCB.
8 word line socket wrapped with a thick tape of high temperature insulation, the positive and negative lines after winding Epoxy will not loose shape.
Remove the outer high temperature insulating tape.
back.
All pins are shrink-wrapped to avoid shorting pins to each other. Silkscreen S10 K300K1 is a varistor that protects the input overvoltage.
8 word line socket from solteam Song Teng, maximum support 250V2.5A.
250V2A fuse, use white glue to fix it.
Silk Screen 19387-R 13A1713E is a common mode inductor.
All through-hole connection cable processing more solid.
PCB Details, STMicroelectronics STM32 Microcontroller, Silkscreen 644BV 7B003 BRD, Silkscreen BQY, Silkscreen VE, Silkscreen 258 4670 1646, Silkscreen T1IS.
ON Semiconductor ON Semi NCP4304A + Infineon Infineon BSC077N12NS synchronous rectification.
Two optocouplers, feedback and protection.
Infineon's primary ic FLUT12A2010.
USB-C uses a bare tongue seat.
PCB up and down through the pin connection, MOS tube package on the copper foil and then screwed in the heat sink, nichicon 33uF 35V electrolytic capacitor.
Separate the upper and lower PCBs, with a white, isolated housing between them.
USB-C output port 20V plug-in, small piece of PCB, two 20V390uf solid capacitors, ground similar to wifi antenna socket design.
Continue separating the isolated shell.
Japan Chemical KXJ 400V56uf high-voltage side electrolytic capacitors.
Large capacitors occupy half the PCB position.
Two Y capacitors use a special case ingeniously erected between the upper and lower PCBs.
Transformer from Sumida.
Silkscreening LT 7B06A KBP208GL Rectifier Bridge.
Silkscreen 19447-R A17120.
Tear off the surface of the copper foil, Infineon spa11N80C3.
USB-C pin, laser code L073N0JD.
The small tabs near the USB output port are wrapped with heat-resistant insulating tape.
Remove the insulation tape, silkscreen Y704 715 33.
On the other hand, ON semi ON Semiconductor FDS6681Z, PMOS. It is the output switch of C mouth, PCB area is limited, has adopted the plan of erecting PCB.
