Type C application technology and future trends March 2015，Apple ’s MacBook，Google ’s Chromebook，July 2015 ASUS Tablet ZenPad，September 2015 Nexus 5X，6P & Pixel C released and used Type C technology The Nokia Z1，LeTV and OnePlus 2 phones also have Type C functions. The discussion of Type C is getting hotter， which makes us look at the future of Type C again.
Let's take NOKIA N1，Type C of LeTV mobile phones on the market，and find that TYPE-C mobile phone， although it is TYPE-C connector，does not meet the specifications of TYPE-C. The original factory is a charger with TYPE-A，TYPE- A to TYPE-C's cable，so the mobile phone is still an interface concept for speculation. Looking at the real "Type C" in the mobile phone industry requires a transition period. But for NB，Apple ’s MacBook and Google ’s Chromebook use USB-C Multi-Function (USB 3.1 Gen1， DP)，Type-C charging / PD charging，which can be said to be the more authentic Type C. This also shows that Type C trends in different industries are different.
Before talking about Type C technology and market，we can know Type C. First，correct the saying that "type C is USB3.1"，USB3.1 is the protocol，and Type C is the interface definition，which is a completely different concept.
Type A， Type B， Type C are as follows:
Type C female definition:
Type C male definition:
What are the advantages of Type C? 1. Support the "positive and negative insertion" function that can be inserted from both sides; 2. The maximum data transmission speed reaches 10Gbit / s; 3. It can withstand 10，000 times of repeated insertion and removal; 4. Slim design; 5.USB The size of Type C interface socket is about 8.3mm × 2.5mm; 6. The standard specification cable equipped with USB Type-C connector can pass 3A current， while also supporting the “USB PD” that exceeds the existing USB power supply capacity，which can provide 100W of electricity.
To sum up，Type C does have many advantages. This trend is well-founded. Then let's take a look at the market and see how the market will accept Type C. According to my rough summary of different industries: the first and fastest login should be
a. Mobile phone
b. Notebook NB
c. Power bank
d. Charger (travel charger，car charger)
e. Handheld，miniaturized (POS，drone，etc.)
The reasons for choosing them are as follows:
1. There is a demand for fast information transmission
2. There is a demand for miniaturization
3. A demand for charging speed
4. Large market volume is conducive to the development of Type C economic chain.
Now that the market has begun to infiltrate，online experts predict that 2016 will be a starting and popular period.
If you have a Type C standard interface，do not pursue USB3.1 first，so the design is simple and low cost. For example，if the mobile phone is changed to USB Type-C USB2.0 interface，only the cable needs to be redone， no chip，the cost is very small .
If Type C develops smoothly，the following markets will also be popular:
a. High-end lighting DC to DC
b. Projector
c. Security
d. Netcom
e. Industry
f. Medical
g. Set-top box
The reason for choosing them is that 1.Type C supports a maximum output of 100W， and the power of some interfaces is sufficient to support applications. 2. These industries need standardization to save costs. 3. The demand transfer rate is fast and the reliability requirement is strong.
In terms of Type C design， various chip companies have provided a lot of solutions， but many of them are left to customers to choose in terms of protection. In this regard， I can focus on talking about the protection. Overvoltage protection， there are a lot of Type C signal lines， which need to be protected against static electricity. USB Type-C uses two sets in order to ensure that both positive and negative can be plugged in. The speed has reached 10Gb. If the protocol is upgraded later， if both groups pass it， it will be the same as DisplayPort 20Gb. Therefore， the future trend ESD capacitance value is lower (<0.1pF) Summary of signal line transmission rate and AEM recommended capacitance value:
Over-current protection， power switch is generally added to the front end of Type C， so some USB2.0 do not add fuse. However， due to the large current of Type C and the large power of the load， the impact energy brought by the abnormality is destructive. Therefore， power switch cannot completely cover the problem of interface security， which requires over-current protection.
There are 4 Type C power supplies and 4 grounds each，so it can support up to 100W. P.S. Go to your car's car charging port and find that it can support 180W， so it is promising to do type C NB charging application after car charging. As shown below. USB Type-C supports 20V / 5A，it is necessary to add another chip that supports USB PD，so USB Type-C interface does not necessarily have 20V / 5A function.
