Qualcomm says manufacturers can decide the voltage levels used on Quick Charge

Qualcomm is at the center of a small controversy involving the Type-C USB port and its Quick Charge 3.1 technology. Apparently there have been some questions about whether Quick Charge 3.1 is running outside the voltage specifications required for the Type-C port. By increasing the voltage to 9 volts or 12 volts, Quick Charge 3.1 allows the internal battery on handsets like the HTC 10 and LG G5 to charge much faster than normal.

According to the specifications of the USB Type-C 3.1 port, the Vbus line should be held in a range between 4.45 volts and 5.25 volts. Thus, Qualcomm's Quick Charge 3.1 would appear to be running too much voltage through the line. And when too much voltage runs through a wire designed for a lower capacity, the results can be shocking.

Qualcomm has addressed the issue with a statement released today. In the statement, the chip maker says that when a manufacturer decides to use Quick Charge, it can set the voltage of the feature so that it can be compatible with the USB port installed on the device. LG and HTC can determine the voltage to use with Quick Charge 3.1 in order to safely run this amount of voltage through the USB Type-C port.


The manufacturers set up the Quick Charge technology to provide quick charges while at the same time they can maintain a safe flow of voltage through the USB port. So far, as Qualcomm has noted, there have been no reports of any problems or injuries.
source: AndroidCentral