As early as the summer of 2016, Qingmi under the Xiaomi ecological chain launched a subversive concept of "Qingmi Charging Station" multi-port charger, which has five QC2.0 output ports that can be inserted at will. Compared with the traditional multi-port charger at that time, Qingmi Charging Station has a special function. Two USB ports can output 20V to power the notebook. This special function can be said to have earned enough attention at that time.
In 2018, the output port is configured as four 5V2.4A intelligent output ports and a QC3.0 fast charging output port. In addition, this charger has newly added the hottest USB-C PD interface, which is more people-friendly and practical. Next, Xiaobian will disassemble this millet multi-port charger to see what it looks like.
One: Unpacking articles
Xiaomi USB charger is packed in a simple style carton, and the product pattern is printed on the front.
The product parameters on the back of the packaging box are as follows, Name: Xiaomi USB charger 60W fast charging version (6 ports), product model: CDQ06ZM, interface type: USB-A x 5, USB-C x 1, working temperature: 0 C ~ 40 C, product size: 110 x 80 x 20mm, input parameters: 100-240V ~ 50/60hz1. Output parameters: 4xUSB-A: 5V4.8A (single port 2.4A MAX), 1xUSB-A: 5V3.0V9V2.012v1.5A, 1xUSB-C: 5V3.09V2.012v1.5A, entrusting party: Xiaomi Communication Technology Co., Ltd. and manufacturer: Jiangsu Zimi Electronic Technology Co., Ltd. (Xiaomi Ecological Chain Enterprise).
List of unpacked items, charger body x1, instruction manual x1, 8-character power supply line x1.
A piece of dust-proof adhesive tape is used at the outlet of the charger, and it should be torn off before use.
The charger is smaller than the palm of your hand and has a flat design.
All the outlets are placed on the front side, from left to right are USB-C PD outlet, red USB-A QC fast charging outlet and four 5V2.4A outlets.
The surface of the shell is very smooth, and the logo "Mi" of Xiaomi Company is printed directly above it.
There is a white LED indicator under the "mi" logo, which will always be on when it is powered on.
Looking at the details of the tongue piece of the output seat, there is no magnetic attraction reaction at all, and the mother seat of Xiaomi trademark is not used.
The bottom of the charger has four protruding points, which can avoid mirror wear when placed, and a little padding can make the air circulation not stuffy.
Parameters of nameplate behind charger are as follows, Name: Xiaomi USB charger 60W fast charging version (6 ports), model: CDQ06ZM, input: 100-240V~50/60Hz 1.6A, output: four ports (gray USB-A): 5V4.8A (single port 2.4A MAX), single port (orange USB-A): 5V3.0A/99.
The matching 8-character line adopts water drop modeling design.
POWER-Z FL001 is used to poll the common 5V port, and it is found that the 5V output port supports the apple 2.4A protocol.
Use POWER-Z FL001 to poll the protocol of QC fast charging port. From the screen, we can see that the fast charging port supports apple2.4A, Qualcomm QC 2.09V2V, Qualcomm QC3.0, Huawei FCP and Samsung AFC.
Use POWER-Z FL001 to poll USB-C port for protocol identification. From the screen, we can see that USB-C port supports Qualcomm QC 2.09V2V, Qualcomm QC3.0 and Huawei FCP. Note that apple2.4A is not supported here, but it is supported after re-plugging.
After plugging and unplugging again, it can be seen that it supports the apple 2.4A protocol. With questions, Xiaobian uses the USB-C port of this millet multi-port charger to charge the ipad, and the recorded power is 5.12V 2.33A 11.98W, which is indeed the apple2.4A protocol, but sometimes it needs to be plugged and unplugged to trick correctly.
Using POWER-Z KT001 to query USB-C port for PD message, we can see from the screen that USB-C has three PDOs, namely 5V3A, 9V2A and 12V1.5A.
Second: Disassembly articles
The shell is welded by ultrasonic wave, so the welding firmness is very high, and the crowbar can be pried open slowly from the edge.
Top view of PCB pin parts.
Top view of PCB surface.
The appearance of removing and welding the heat dissipation aluminum plate.
High voltage input part, fuse, X capacitor, filter inductor, and green NTC to suppress power-on shock.
Three yuan Acon 400V39μ F filter capacitor, this transformer is stepped down for four 5V2.4A output ports, and there are two 6.3V1000μ F solid-state filtering, two Y capacitors to avoid floating screen.
This transformer is used to transform voltage to QC fast charging port and USB-C port output. Next to it is a green NTC input current limiting device, which reduces the surge current and prolongs the service life of the charger. Two 16V330μ F solid-state filtering, also using two Y capacitor anti-drift screens.
USB-C and orange fast charging port, screen-printed WT6615F, Type-C output port identification.
Dialog iW1760B, two primary switch tubes with fast charge and output, P1160VD, new product, withstand voltage of 600V, current 11A, and iW1760 primary feedback PWM controller on the right.
AON6226 synchronous rectifier tube, the left SOT23 element is synchronous rectifier controller. Because the fast charging circuit adopts step-down output, a 100V withstand voltage tube is adopted, and the conduction resistance is 8 mOhms.
Here we see two South Core SC8001A synchronous rectifier buck controllers, and two AON7534 plug-ins to form synchronous buck. Like the buck we have seen before, it is a combination of a controller plug-in MOS, but it is a breakthrough from scratch in China. In the past, we basically dismantled foreign brands, and this time we finally saw China Core.
VBus switch of Type-C output port, Wei Zhao VS3508AE.
Star identification IC, Taiwan Province Tianyu Fitipower FP6601Q.
Chengyi TCS2101, an identification IC with built-in current limiting protection, provides over-current protection and automatic identification function of USB output port.
Here is the synchronous rectifier with 5V output, AON6268. Withstand voltage of 60V, low conductance, suitable for high current output.
Primary circuits with 5V output, TK7P65W and iW1760B.
Two rectifier bridges, with capacitors, rectify the input AC into DC.
Summary:
Xiaomi 6-port USB charger 60W fast charging version has added USB-C output in line with the times, and USB-C port can support PD, QC3.0, FCP and apple2.4, which greatly improves the practicability compared with the previous work.
The independent design of 5V high current output and fast charging can effectively reduce the heat accumulation during high power output. The fast charging port adopts synchronous rectification and voltage reduction, the switching power supply with fixed voltage output and synchronous rectification output, and the efficient and flexible combination provides a stable and pure output for this charger. At the same time, it is the first time that we have seen the chip of Nanxin appear in the charger, which represents the rise of domestic autonomy.