As the cell phone market becomes almost saturated, the competition between major mobile phone brand competition is more refined as well, the applications of micro-innovative technologies add new vitality to the smartphone market, and quick charge technology is one of the many micro-innovation items. Furthermore, in an era that people can’t live without smartphones, the smartphone power consumption is extremely fast, the mobile power supply almost become essentials when people goes out. Therefore, it’s necessary to improve the smartphone’s battery life. Right now, there several ways to improve the battery life of smartphones: First, provide larger capacity of battery. But there are less smartphones battery capacity can reach up to 4000mAh at present; Second, improve the efficiency of the smart phone charge on the basis of quick charge technology; Third, combine the large capacity battery with fast charg technology; Fourth, flexible cell (From the long-term perspective).
Certainly, from the moment only, it is undoubtedly the best choice to combine large capacity battery with quick charge technology. There is no doubted, the birth of quick charge technology is becoming the rigid demand of the current and future smartphone market. Although in 2015, quick charge technology is accepted by a part of the smartphones market and used in some areas, and many smartphones can support the quick charge solution, which is one of the best-selling points. In a view of the whole mobile phone market, few mobile phones can support quick charge technology, and it just be used in a narrow market. Then, if possible the quick charge technology can break out in 2016?
Recently, EEVIA holds "2016 China media BBS and ICT industry and technology outlook seminar" in Shenzhen. At the meeting, the global leader in Power conversion IC Power Integrations senior application engineer, lab manager Jason Yan, the development trend of quick charge in 2016 put forward his opinion. In addition, he also introduces the Power Integrations of the latest generation of constant Power, high efficiency InnoSwitch - CP series constant voltage/constant displacement line flyback switch IC products.
According to Jason Yan, electricity derived from the linear step-down development up to now, do smaller and smaller in volume, quick charging has become a pioneer of the current. He said: "quick charge developing very rapidly, mainly reflected in three aspects, one is the charger and the connected load to communicate, to adjust the charger output to achieve the purpose of the battery fast charge, when the power supply must be able to respond to the dynamic change of output voltage/current limit, secondly the rise of the charger output voltage allowed by cable output more power, but also not increase the power loss on the cable, in addition, the charging speed will be faster, loss will be reduced."
According to understand, for quick charge, the current there three ways to achieve this purpose, it is well known that power is equal to the voltage multiplied by the current, therefore, the first way is to increase the voltage in the case of constant current, first by the charger voltage to 5 V to 220 V, because the output voltage is 5 V USB charger, and then down to 4.2 V or other gear, at a time when, if continue to increase the voltage leads to the charger and smart phone fever, at the same time, the greater power consumption will also cause damage to the battery. The second way is to improve current, constant voltage and then through the parallel circuit, at this time of every circuit voltage will be reduced. The third way is increase the voltage and current at the same time, at this time because of the increase in voltage will produce more power, energy consumed in the process will also increase, of course, the improvement of voltage and current is not unlimited, USB charger, cable and power must match each other to realise quick charge.
It is worthy mention of Verus Peripheral WC20Q3 WWBLK charger, which supports Qualcomm’s latest quick charge agreement QC3.0. The output voltage range of Verus Peripheral WC20Q3 WWBLK charger is between 3.6 V ~ 6.5 V with a current of 3A for a gear, the other two gears are 6.5 V ~ 9 V / 2 A, 9 V ~ 12 V / 1.5 A. This quick charger is adopted Power Integrations. And QC 3.0 quick charge agreement allows the charger 200mv step voltage increment, rather than a QC 2.0 5/9/12 V step, more importantly, QC 3.0 can optimize internal DC/CD efficiency inner the mobile phones, not only eliminates the inherent in QC2.0 when phone fever caused by voltage switch, but also simplify the wireless charger architecture by removing the smartphone’s DC/CD transformers, which means a lot for designing and developing of quick charger.
This is the first part one of quick charge technology which talks about the basic principle of quick technology, for more information, please read part two: how quick charge technology works, the challenge and solution for quick charge technology development. And if you have any ideas on this topic, please leave your comment below.