Yes, Apple's official website about the iPad charger page, also explained.
< br >
iPad charger parameters are 2.1A\/12W, iPhone charger parameters are 1A\/5W. When using the iPad charger to charge the iPhone, if the Phone can only receive 1A current, the iPad charger will only provide 1A current output.
< br >
However, starting from the models after the iPhone 6, the charging profile of the iPhone is the same as that of the iPad, which means that the later devices can also use 2.1A current charging, and the maximum support is not more than 12W power, and the iPad charger can shorten the charging time of the iPhone to a certain extent.
< br >
The iPad has a much larger battery capacity than the iPhone, so it is designed to charge at a current of 2.1A for the best charging time.
< br >
If the iPhone charger is used to charge the iPad, since the maximum current output of the iPhone charger can only be 1A, the entire charging time will be about 2.1 times that of the original. Due to the design of Apple on the USB interface, the iPad will recognize the iPhone charger at this time. Charging current of more than 1A is not required, and it will not overload the iPhone charger and cause damage.
< br >
Extended data
< br >
iphone30W USB? C Power Adapter Overview
< br >
Whether at home, in the office or on the road, Apple 30W USB? C power adapters allow you to charge quickly and efficiently.
< br >
Is this power adapter compatible with any USB support? C's device, but for ideal charging performance, Apple recommends pairing it with a 12-inch MacBook.
< br >
You can also pair it with the iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, or select iPad Pro models to take advantage of the fast charging feature.
< br >
Apple official website: 30W USB? C Power adapter
cannot
You can't charge your iphone with your ipad charger
First of all, the answer is no, that is, the ipad charger cannot charge the iphone. Why is that? Let's first take a look at the charging process of the charger.
That is, one end of the charger plug is plugged into a 220v AC socket, and the other end is connected to our digital products with Apple's special data cable.
First, it can be charged, but it will damage the charger or the phone, and it is not recommended to mix.
Second, although the charging voltage of both is 5V, the charging current of the iPhone is 1A, while the iPad is 2.1A, the power of the iPhone charger is 5W, and the iPad air is 10.2W. The effect of this is to damage both iPhone and iPad chargers (too much current can cause critical capacitor breakdown). Do not mix iPhone and iPad chargers.