The difference of QC2.0 and QC3.0 fast charging

With the development of fast charging technology, the competition in the charger market is fierce, and Qualcomm QC fast charging still dominates the market. Now QC fast charge has been developed to the fourth generation, each generation has made great progress.

It is precisely because the frequency of Qualcomm update is too fast, the replacement speed of the product can not keep up, so that the products equipped with QC1.0, QC2.0, QC3.0 technology are also circulating in the market. So how do you make a big difference between QC1.0 and QC4.0? Let’s make a comparison.

In the NOKIA era, a 800mAh battery is not a problem for two or three days, so the charger with 5V0.5A is completely enough, and it can be filled in two or three hours.

After 2010, the large-screen smart phone represented by Android became popular. The battery capacity has been turned over several times. 2000mAh has become the standard (currently the highest has broken 6000mAh). If it is still charged at 5V0.5A, it is estimated that it will not be fully charged in one day. , so the charging power must be increased. So QC1.0 was born.

QC1.0: The voltage and current are increased to 5V2A, and the charging time is shortened by 40%.

Large-screen smart phones became popular, battery life could not keep up, and fast charging became a way for manufacturers to improve user experience, so QC2.0 was born.

QC2.0: QC2.0 has changed the charging voltage. The 5V voltage of many years has been raised to 9V/12V/20V. It achieves 18W high-power power transmission under the same 2A current with QC1.0, and the wire does not need special treatment. Wires are universal.
When the voltage is increased, the power is up, and the efficiency is reduced. Most of this energy is converted into heat, so the 20V voltage file is almost useless, leaving only 5V, 9V, 12V three gears.

QC3.0: Based on QC2.0 9V/12V voltage, further subdivide the voltage file, adopt the unique INOV algorithm, set the voltage with 200mV as the first gear, the lowest is 3.6V, the highest voltage is 20V, and it is compatible with QC2.0. Due to the full use of the Type-C cable interface to replace the original Micro USB interface, the maximum current has also increased to 3A, because the lower voltage, the efficiency is up to 38%, the charging speed is increased by 27%, and the heat is reduced by 45%.

QC4.0: Increase power to 28W again and add USB PD support. The 12V voltage is canceled, the maximum output of 5V is 5.6A, and the maximum output of 9V is 3A.