What is the fast charging technology at the iPhone11 conference? Which models of iPhone can be charged quickly?
The Apple conference has just ended. At this conference, Apple only used about 10 seconds to introduce the 18W PD fast charge on the iPhone 11 Pro and iPhone 11 Pro Max. According to the official website information, the iPhone 11 is still equipped with a 5W charger. In fact, for iPhone users, it is not so difficult to achieve fast charging.
In this section, Inviolabs will focus on the PD protocol and give you some advice on purchasing an iPhone.
Looking back at the iPhone's practice of fast charging, it actually started in the iPhone 8 series, and the iPhone 8 supports PD 18W fast charging. The full name of the PD is USB Power Delivery, which is the USB charging standard and technology released by the USB Developers Forum (USB-IF) in 2012.
In recent years, USB-IF is pushing the PD protocol as the charging standard for all devices. At present, some of Apple's mobile devices, such as iPhone, iPad, and MacBook, have joined the PD protocol, and Android phones are also compatible with the PD protocol. So the PD protocol is expected to be the only standard for mobile devices and desktop devices.
If you want to find a charger for your mobile device that can fully implement fast charging, consider supporting the PD protocol.
After 7 years of development, the PD protocol has reached the PD 3.0 version. In version 3.0, PD supports PPS (Programmable Power Supply, PPS). PPS is compatible with other fast-charge protocols already available in the market. In PD 3.0, the latest QC 4.0 fast charge has been supported. The charging rules for PD 3.0 are shown in the figure below.
At present, there are two types of fast charging schemes: a high voltage and a small current scheme and a low voltage and a large current. For example, we often hear the Qualcomm QC fast charge protocol, which uses a 9V/2A high voltage and low current solution. Qualcomm's use of this solution was limited by the maximum current supported by the charging line at the time, when the maximum current supported by the Micro USB charging line was only 2A.
Therefore, you can only choose high voltage and small current for fast charging. This charging method is very friendly to the user without replacing the existing interface and charging cable. However, since the voltage is increased, the heat generation of the charger is quite serious.
The second option is low voltage and high current. For example, the VOOC flash charging introduced by OPPO was the low voltage and high current solution used. This solution solves the problem of heat well, but the requirements for wire are very high. OPPO has specially customized the relevant wire to realize VOOC flash charging.
The PPS in the PD is compatible with both high voltage and low current and low voltage and high current. This is a unique advantage of the PD protocol.
After learning about the PD protocol, I believe that you have a clear understanding of the future of the PD protocol and would like to try it out. Because the PD's fast-charged charging head can really reduce the number of chargers that can be carried when traveling. So how do you choose the right fast charging device for yourself?
If you only want to charge your iPhone，you need an Apple MFI certified USB-C to Lightening charging cable, and a PD-based charging head, at least 18W, so that you can achieve fast charging.
If you use iPhone and MacBook air, it is recommended to use a USB-C charging head that supports PD. If it is another mobile phone that supports the QC protocol, it is recommended to use the Charger of 60W dual port, A+C version.
If you have too many electronic devices and don't know how to choose the right fast charge product, please leave a comment and I will recommend the right solution for you.
Inviolabs also has done a test for iPhone 11 PD Chagers in order to find out which is better, you can click here to for the details.
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