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Fast charging technology with each passing day, fast charging market debate today, Qualcomm QC fast charge still dominate the market. Today, the rapid development of QC has been developed to the fourth generation, each generation has a revolutionary progress.
From QC1.0 to QC4.0 replacement time is short, can not help but let the masses complain. "What? I QC3.0 are useless, QC4.0 out? Qualcomm dad mighty."
It is because of high old driver accelerator Yiqijuechen, iterative speed products can not keep up, which equipped with QC1.0, QC2.0, QC3.0 technology and products in the market circulation. As a new Renminbi issue, the old version of the RMB is still in circulation can be understood, there are people with the Kangxi reign justified it! So QC1.0 to QC4.0 in the end how big changes, the following comparison.
The era of NOKIA, a 800mAh battery for two or three days is also not a problem, so the collocation 5V0.5A charger is fully used, two or three hours to full, if there is no NOKIA ruling planet, QC fast charge what happened.
After 2010, large screen smartphone with Android as the representative of the popular, battery capacity multiplied, 2000mAh has become the standard (currently has the highest 6000mAh, 5V0.5A or broken) if it is charging, charging two hours, 5 minutes ", so we must improve the charging power. How much? Let's start with a 5V1A. But still not enough ah, USB-IF stand up and say: "try 5V1.5A." Or small, then Qualcomm spoke: we want to 5V2A." So QC1.0 came out.
QC1.0: voltage and current up to 5V2A, charging time reduced by 40%
Time continues to move forward, the big screen smart phones began to erupt, battery life can not keep up, quickly became one of the magic weapon manufacturers to enhance the user experience, so QC2.0 was born.
QC2.0: compared with the old standard, QC2.0 epoch-making change from the charging voltage, keep for conventional 5V upgrade to 9V/12V/20V, keeping the same 2A current implementation of 18W power transmission and QC1.0, and the wire does not need special treatment to general old wire.
To increase the voltage, power is up, the efficiency has declined. Voltage to improve each file, the efficiency of about 10%, most of these energy into heat, so almost no one 20V voltage files used, only to retain the 5V, 9V, 12V file three. Even so it is not hot, Qualcomm also think 5V to 9V step too big, a little pull to the egg, so you can continue to adjust to the 0.2V unit until the most appropriate voltage, the voltage is the most appropriate? Qualcomm has its own unique voltage intelligent negotiation (INOV) algorithm, which is QC3.0.
QC3.0: the QC2.0 9V/12V two voltage on the basis of further subdivision of the voltage profile, using the INOV algorithm with 200mV as a unique, set the minimum voltage, maximum voltage dropping to 3.6V 20V, and 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 raised to 3A, because the voltage is lower so the efficiency of up to 38%, charging speed increased by 27%, heating down by up to 45%.
QC3.0 is good, but do not agree with Google ah, you engage in a separate high do, I must give my system using USB PD protocol, the arm is no thigh, Qualcomm furuan, launched QC4.0.
QC4.0: power up to 28W again, and add USB PD support. Cancel the 12V voltage file, 5V maximum output 5.6A, 9V maximum output of 3A, and voltage files continue to subdivide to 20mV file.