However, after the launch of iPhone 8 and iPhone X, iPhone users can actually achieve fast charging (but Apple still uses the ancestral 5V/1A charger). The secret lies in a fast charging protocol called PD . So what is the sacred PD fast charge?
What is the PD fast charge protocol
The full name of PD should be called USB Power Delivery Specification, which is a fast charging standard launched by the USB standardization organization.
This fast charging standard has been in operation for several years, and USB PD has now reached version 3.0. For example, iPhone 8 and iPhone X support PD3.0 protocol.
So what is this agreement for? We know that there are two implementation modes for fast charging of mobile phones. One is a high-voltage solution. For example, Qualcomm's QC 3.0 uses a 9V/2A charging solution.
The USB PD protocol was launched under this situation. He "naturalized" many fast charging protocols on the market. Since mobile phone charging is done through the USB interface, the USB standard stipulates that the voltage and voltage must be adjusted through the USB PD protocol. Current.
At the same time, Google also stated that fast charging can only be used through the USB PD protocol, which made everyone accept the "Overlord Clause" of USB PD in disguise.
Advantages of PD
But supporting the USB PD protocol is definitely a great thing. Through such a unified protocol, all mobile phone users can better enjoy the fast charging technology, which is convenient for everyone.
Especially after the PD protocol is also supported like the iPhone, you can also enjoy the fast charging function. According to the test data provided by the charging head network, iPhone 8 can achieve a peak 19W fast charge under PD fast charge.
The PD 3.0 protocol can achieve a charging power of up to 100W, which can not only charge mobile phones, but also computers, tablets, game consoles, etc. can actually be used to achieve fast charging.
However, the USB PD 3.0 protocol theoretically requires a USB 3.0 interface, which means that the type-C interface on the mobile phone can only be supported, such as the previous Micro-USB interface mobile phone cannot be used. For example, the new MacBook uses the typy-C interface as the charging interface, which will also have a better performance in charging efficiency and versatility.
The development of mobile phone charging in the future
Nowadays, under the condition that battery technology will not advance by leaps and bounds, fast charging has become an effective solution for mobile phones to solve the problem of battery life.
