Will high-power production electric chargers damage my phone?

A question raised by a netizen impressed me deeply. 87W, isn't this a laptop charger? Won't such a large amount of power damage the phone? 1202. Worried that the charger will damage the phone? So, can high-power chargers damage your phone?

Before answering this question, we need to understand the type of output interface of the charger and its working mode. At present, the charger output interface on the market can be roughly divided into two types: USB-A and USB-C.

The most common is the USB-A interface. This interface has been in use for over 20 years. We can see it in many electronic digital products, and USB-A interface products are constantly appearing in the market. To describe it with an idiom, the old wall is more appropriate.

High power charger

The shape of the interface is rectangular, which is how most people should stand behind a computer case for the first time, at least those born in the 1990s and before. In addition to the shape, its most obvious feature is the four metal domes (contacts), two of which are responsible for power transmission (positive VCC, ground GND), and the other two are responsible for data transmission (data positive D+ and data D-).

In addition to using D+ and D- codes to judge the protocol, there are some fast charging protocols that use the current pulse signal to judge the code, such as MediaTek's PE fast charging. As for the USB-C interface, its shape is similar to a flat ellipse, and its volume is smaller than that of USB-A, but the internal contacts are as high as 24Pin, which is 6 times the interface of ordinary USB-A. It's also true that more connections means more functionality. Whether it is power transfer or data transfer, USB-C is much stronger than USB-A. At present, more and more devices use the USB-C interface, which is the future development trend. In the USB-C charger (PD fast charge), the signal is transmitted through the CC line, and the charger communicates with the mobile phone to exchange information. The charger will first tell the mobile phone its own power information, and the mobile phone will apply for an acceptable voltage and current. If there is no suitable voltage range, 5V charging or no charging is selected by default. as follows.

Will high-power chargers damage my phone? The answer is no. Because the charger will do a series of communications and exchanges when charging the mobile phone, the voltage and current can be adjusted at any time. For the charger that uses the USB-A interface to charge the mobile phone, the two will report the joint code. After matching, the phone will be charged. If it doesn't match, the phone will refuse to charge; it will be more frequent and accurate, and constant communication will ensure a good charging schedule.