Preface
IPhone found that it has been upgraded to the 15th generation today, and the charging interface started from the IPhone15 series, and the USB-C interface was changed from the Lighting interface to the USB-C interface, however, Android's fast charging is still not supported on the iPhonehone, for the charging head, I have explained it in detail in the previous article, so, what about the charging cable, I will give you a detailed explanation today.
In addition to the official configuration of the charging cable, the market sells a wide variety of wires, including shoddy, mixed with inferior charging cables, then, how can we avoid stepping on the pit, buy a qualified charging cable?
To choose the charging cable correctly, we must first popularize the knowledge of the charging cable, from the interface of the charging cable, the length of the charging cable, the charging capacity (including the maximum voltage, the maximum current, the maximum output power), and the data transmission capacity.
1. Interface
At present, the charging cable used for mobile phones, the interface is divided into USB-C, USB-Micro B, Lighting three kinds, of which the USB-Micro B interface (commonly known as the flat port) has been eliminated, and the IPhone-specific Lighting interface should become history, so there is no waste of time here.
- USB-C: supports maximum voltage, current, and power;
- Lighting: Maximum current 3A, DCP, Apple 5V 2.4A fast charging protocol;
- USB-Micro B: Maximum support current 2A, support DCP, Apple 5V 2.4A, QC, FCP, Samsung AFC and other protocols.
Second, the length of the charging cable
According to different needs, the charging cable usually has more than a fixed length, the longest even reached two meters, here, some friends will think that the length of the wire will directly affect the charging speed and the heating of the charging line, according to the theory, the longer the wire, the greater the resistance, the greater the heat, the smaller the current, in fact, the current has been able to make the resistance of the wire very small, the impact on the current is negligible, so, the length of the charging cable is selected according to its own needs, do not worry about the charging efficiency.
3. Charging capacity
The charging capacity is divided into three aspects: the maximum voltage, the maximum current, and the output power.
1. Maximum voltage
- USB-A to USB-C charging cable, you should note that this type of charging cable on the market basically does not support PD protocol, the maximum supported voltage is 20V, and it is not excluded that some manufacturers will make magic changes to it in order to improve the return rate, so that the charging cable supports PD protocol, such as Xiaomi's standard charging cable, although it supports PD protocol, but only supports PD3.0, and the maximum voltage of PD3.0 protocol is also 20V, so, USB-A to The USB-C charging cable supports a maximum voltage of 20V.
- USB-C to USB-C charging cable, this is the common charging cable on the market, both ends are C ports, and no matter what, according to industry standards, this kind of charging cable is the default support of PD protocol, do not rule out some inferior charging cables do not support, PD protocol is divided into 3.0 and 3.1, PD3.0 supports a maximum voltage of 20V, PD3.1 supports a maximum voltage of 48V, charging specifications of 28V5A and 48V5A,
Therefore, the fast charging cable and the charging cable with an output power of more than 60W are basically marked with support for the PD3.1 protocol.
2. Maximum current
- USB-A to USB-C charging cable, generally speaking, the maximum voltage supported by this type of charging cable is 3A, and this kind of charging cable is the most mixed, in addition to some mobile phone brand manufacturers have their own private agreements, other manufacturers specializing in charging cables will also make magic changes to the charging cable, for example, Xiaomi (Mipps), OPPO (super VOOC), VIVO (VFCP), Huawei / Honor (SCP) and other domestic head manufacturers, have made magic changes to their own standard fast charging cables, so that the maximum current of the charging cable is higher than 3A, but the condition is to match their own charging head, and it is to charge their own mobile phones to stimulate the private protocol, if you use it to charge other brands, sorry, not supported, the maximum current is back to 3A, I have to say, the pattern of domestic brands is really big.
- USB-C to USB-C charging cable, because this kind of charging cable supports PD protocol by default, the maximum supported current is increased to 5A, the same reason, domestic manufacturers have further improved their own charging cables, Xiaomi has 6A/10.5A, OPPO/OnePlus/Realme has 6.5A/8A/10A/12A/15A, Huawei/Honor has 6A/ 10A, in the same way, use them to charge other brands of mobile phones, and the current goes back to a maximum of 5A, because the respective private fast charging protocol cannot be activated.
3. Maximum output power
The formula for calculating power, W=UI, that is, voltage * current, this is easy to understand, the maximum output power of the charging cable can be calculated according to its annotated parameters, for example, Xiaomi's 20V6A charging cable, its output power is 20*6=120W, Apple's 15 series standard charging cable is advertised as 20V3A, so the maximum output power is 20V*3A=60W, because Apple does not have a private protocol, when you use it to charge other devices, as long as the charging head is matched, the maximum charging power can be reached.
Fourth, the data transmission rate
The transmission rate of the charging cable is a standard function, but there is a difference in the transmission rate, the current charging cable, including the manufacturer's standard, the transmission protocol is USB2.0, the mobile phone charging port of some domestic manufacturers is equipped with USB3.0, but the accompanying charging cable does only support USB2.0, the transmission speed is 480Mbps, a bit funny, if you want to enjoy the USB3.0 transfer rate, then buy a charging cable that supports USB3.0.
To sum up, I personally think that the knowledge of charging cables has been popularized, and the next thing is up to friends to choose. I'll just say a few things to keep in mind when choosing a charging cable for the iPhone 15 series.
- The charging interface of IPhone15/IPhone15plus is USB2.0, and the charging interface of IPhone15pro/Promax is USB3.0;
- The charging port of the IPhone15 series is not encrypted, and any charging cable without an exclusive protocol can be used, and there is no transfer rate limit;
- The IPhone15 series charging interface has an input power limit, the maximum input peak power is 27W, and the charging cable with the largest output power is the same;
- Most USB-A to USB-C charging cables do not support the PD protocol, charging the IPhone series, the maximum input power is 7.5W, which is why I don't recommend friends to buy A to C charging cables;
- The IPhone15 series supports reverse charging, but the output power supports up to 4.5W, which is not limited by the device.
【Conclusion】Friends who hold IPhone15Pro/Promax, when buying a charging cable, it is best to buy USB3.0, don't ask me why, wait until you use it and then tell me.
If there are any errors in this article, please correct them, thank you!