The difference between Qualcomm Quick Charge Protocol QC1.0, 2.0, 3.0, 4.0 and 4.0+
Nowadays, the fast-charging market for mobile phones is contending, and Qualcomm is still the leader. From 2013 to now, Qualcomm's QC fast charge protocol has developed from 1.0 to 4.0+. Let's take a look at the difference between QC1.0, 2.0, 3.0, 4.0 and 4.0+ of Qualcomm's fast charge protocol.
QC1.0: Released in 2013, the interface is Micro USB, the voltage and current are increased to 5V2A, the charging time is shortened by 40%, the era continues to advance, the large-screen smart phone begins to explode, the battery life can not keep up, and fast charging has become a manufacturer upgrade One of the magic weapons of user experience, so QC2.0 was born.
QC2.0: Released in 2014, the interface is Micro USB/USB-A. Compared with the old standard, QC2.0 has epoch-makingly changed the charging voltage, from the conventional 5V that has been maintained for many years to 9V/12V/20V , It achieves 18W high-power power transmission at the same 2A current as QC1.0, and the wires can be used universally without special treatment. Increase the voltage, the power will go up, but the efficiency will drop. Every time the voltage is increased by one level, the efficiency drops by about 10%. Most of this energy is converted into heat. Therefore, almost no one uses the 20V voltage level, leaving only the 5V, 9V, and 12V levels. Even so, it’s still too hot. Qualcomm feels that the 5V to 9V step is too big and it’s a bit of a drag, so it can be adjusted in units of 0.2V until the most suitable voltage is found. What is the most suitable voltage? Qualcomm has its own unique. The voltage intelligent negotiation (INOV) algorithm, which is QC3.0.
QC3.0: Released in 2015, the interface is USB-A/USB-C, based on the QC2.0 9V/12V two-level voltage, the voltage level is further subdivided, and the unique INOV algorithm is adopted, with 0.2V as the first level. Set the voltage, the lowest can drop to 3.6V, the highest voltage is 20V, and it is backward compatible with QC2.0. Due to the full use of the type-c interface to replace the original MicroUSB interface, the maximum current has also been increased to 3A. Because the voltage is lower, the efficiency is increased by up to 38%, the charging speed is increased by 27%, and the heat generation is reduced by 45%.
QC4.0: Released in 2016, the interface is USB C, the power is increased to 28W again, and USB PD support is added. The 12V voltage file is cancelled, 5V can output up to 5.6A, 9V can output up to 3A, and the voltage file continues to be subdivided to 0.2V.
QC4.0+: Released in 2017, the interface is USB C. On the basis of USB PD3.0 and PPS, the compatibility support of QC3.0 and QC2.0 has been added.