If you’ve been paying attention to Android news, there has been this issue going around that Qualcomm’s proprietary Quick Charge standard is actually “not allowed” on the proper USB Type-C specifications. Qualcomm has come out and clarified its part of the issue, and hopefully it will give you some reassurance in using Quick Charge over a USB Type-C connection, like if you’re using an LG G5.
We’ve talked about Benson Leung before, he has been a USB Type-C evangelist of sorts, making sure that companies put out the correct spec of USB Type-C cables. He’s at it again, pointing out that Quick Charge, Qualcomm’s proprietary charging feature, is actually not allowed in the USB Type-C spec. See the image below, and it says on the last line that manufacturers can have proprietary charging features over USB Type-C, as long as these features “do not redefine Vbus voltage” beyond what is acceptable in USB 2.0 and USB 3.1 specs. Apparently, Qualcomm violates that last line in Quick Charge.
Here is Qualcomm’s reply:
Qualcomm Quick Charge is designed to be connector-independent. It can be implemented in a device that supports a variety of connectors, including USB Type-A, USB micro, USB Type-C, and others. When an OEM chooses to implement Quick Charge into their device, they can configure the voltage to fit within the specifications of the USB Type-C standard. We have received no reports of user experience or device malfunction issues with or without USB Type-C connectors. At Qualcomm Technologies, we are continuously working to provide the best solutions for our customers and consumers. Qualcomm Quick Charge is a leading edge fast charging solution with more than 70 devices and 200 accessories supporting one of the two most recent versions of Quick Charge, with even more currently in development.
The reply doesn’t necessarily answer Leung’s allegations of violations, but Qualcomm does say that manufacturers who use the Quick Charge feature are required to engineer and configure their chargers within USB Type-C specifications. Also, we have the UL and CE seals on the standard chargers, so we know they are safe. Unless you are using non-standard chargers not vetted by the manufacturer.