What are the charging agreements?

What are the charging agreements? 14 charging protocol which is stronger?

As the saying goes: if the battery life is not enough, charge it. With the thinning of mobile phones and the slow progress of battery technology, various mobile phone manufacturers began to formulate various fast charging protocols. Today comes August 18, which of these agreements is stronger?

At present, there are as many as 14 recognized species. Including PD(2 and 3), QC(2, 3, 4), Apple (mobile phone and tablet), Samsung (new and old), Huawei (high voltage and high current), OPPO Vivo 1+ (the old interface has been forcibly changed), MTK (yesterday's yellow flower) and BC 1.2 (the most primitive

Each charging protocol has different voltage and current, and some have multiple gears. The reason is that the protocol is limited by the interface hardware. For example, the Apple protocol is limited by its unreliable data line, the early start of Android phone is limited by the 2A capability of microUSB, and the new USB type-c is extended to 20V5A. However, each one is just a different voltage and current jump logic, the purpose is to find the maximum charging power that your mobile phone line and mobile phone battery can bear. The idea is the same. We decide which protocol to use through the communication between the mobile phone and the charging chip. The advanced protocol uses the terminal voltage data of the mobile phone and the cable resistance to compensate the wires and control the current heating value. Therefore, in fact, there is no practical significance except artificially collecting money from each other and not collecting money. The newer protocol is more powerful, but it can never exceed the limit of 20v5A of USB Type-C. 100w.

We discussed it together last year. What a mess. Let's make an agreement to boost the voltage with as little capacity as possible and take as much compatible current as possible as the threshold, so as to be compatible and avoid waste. So there is the current PD charging protocol, which is compatible with mobile phones, tablets and notebooks. After our discussion, we will gradually stop using new protocols, and all protocols will develop towards PD.