Understand the evolution path of high pass qc1.0 ~ 4.0

Release date：2016-12-27   Views：2509

Understand the evolution path of high pass qc1.0 ~ 4.0

Original charging head network on December 12, 2016

With the rapid development of fast charging technology and the contention of a hundred schools of thought in the fast charging market, the high pass QC fast charging still dominates the market. Now QC fast charging has developed to the fourth generation, each generation has revolutionary progress. From qc1.0 to qc4.0, the short replacement time inevitably makes the masses complain.

"What? I didn't use qc3.0, but did qc4.0 come out? High pass dad is powerful. "

It is also because of the fact that the old drivers of high-tech can not keep up with the iteration speed of products, the products carrying qc1.0, qc2.0 and qc3.0 technologies are in circulation in the market at the same time. For example, if the new version of RMB is issued, the old version is still in circulation. It is understandable that some people use Kangxi Tongbao! How to compare qc4.0 to qc1.0.

In the era of Nokia, it is not a problem to use an 800MAH battery for two or three days. Therefore, the charger with 5v0.5a is enough, and it can be fully charged in two or three hours. If Nokia really dominates the planet, there will be no QC charging.

After 2010, large screen smart phones represented by Android have become popular. The battery capacity has increased several times. 2000mAh has become the standard configuration (the highest has exceeded 6000mAh). If 5v0.5a is still charged, it will be "charging for two hours and calling for 5 minutes". Therefore, the charging power must be improved. How much more? Let's start with a 5v1a. But still not enough, usb-if stood up and said, "try 5v1.5a." Or small, at this time the high pass said: "we are going to 5v2a." So qc1.0 came out.

Qc1.0: voltage and current increased to 5v2a, charging time reduced by 40%

As the era continues to advance, large screen smart phones start to break out, and the battery life cannot keep up with it. Fast charging has become one of the magic weapons for manufacturers to improve the user experience, so qc2.0 was born.

Compared with the old qc2.5v, the current of the wire rod has been improved from 20V to 20V, which can maintain the same power as the conventional qc2.0v.

Increase the voltage, the power is up, but the efficiency is reduced. When the voltage is increased by one gear, the efficiency decreases by about 10%. Most of this energy is converted into heat. Therefore, almost no one uses the 20V voltage level. Only 5V, 9V and 12V are reserved. Even so, it's still too hot. The company thinks that the 5v-9v step is too big, which is a little bit of an egg. So it can adjust it continuously in the unit of 0.2V until it finds the most suitable voltage. What is the most appropriate voltage? High pass has its own unique intelligent voltage negotiation (inov) algorithm, which is qc3.0.

Qc3.0: on the basis of qc2.0 9V / 12V voltage, the voltage level is further subdivided. The unique inov algorithm is used to set the voltage with 200mV as the first gear. The lowest voltage can be detected to 3.6V, and the maximum voltage is 20V. It is compatible with qc2.0 downward. Due to the full use of the type-C interface to replace the original microusb interface, the maximum current is also increased to 3a. Because of the lower voltage, the efficiency can be increased by 38%, the charging speed is increased by 27%, and the heating is reduced by 45%.

Qc3.0 is good or good, but Google doesn't agree. How can you make a separate set of qc3.0? If you use my system, you must use USB PD protocol for me. If you can't twist your arm, you can't get rid of your thigh, and then you can get qc4.0.

Qc4.0: increase power to 28w again, and add USB PD support. The maximum output of 5V is 5.6A, and the maximum output of 9V is 3a.

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