Qualcomm recently announced a new generation of fast charging technology QuickCharge3.0 at the 3G/LTE summit held in Hong Kong. As the third-generation product of fast charging technology, QuickCharge3.0 can increase the efficiency by 38% compared with the previous generation, increase the charging speed by 27%, and reduce heat generation by 45%, which is conducive to extending battery life. The first charger that supports the QC3.0 standard has been launched, using the optimal voltage intelligent negotiation INOV algorithm to charge a typical mobile phone from zero to 80% in about 35 minutes. After the meeting, Qualcomm held an interview about QC3.0 to reveal more details for us.

　　The first charger that supports QC3.0 is from VerusPeripheral accessory manufacturer, the model is WC20Q3WWBLK. It is compatible with wide-range power grids, the input voltage supports 100-240V, there are multiple AC plugs to choose from, and it can be used worldwide. There are three specifications for output, namely 3.6-6.5V/3A, 6.5-9V/2A, 9-12V/1.5A. It can be seen that after adopting the optimal voltage intelligent negotiation INOV (Intelligent Negotiation for Optimum Voltage) technology, it will be 200mV The increment is one gear, which increases the charging speed while effectively reducing energy and heat loss.

　　Compared with its QC2.0 fixed voltage approach, in the past 2.0 was directly adjusted from 5V to 9V, which would be more blunt. Now 3.0 uses 200mV as a gradual unit. The voltage was not high at the beginning of charging, but gradually increased later. This smart upshift method can better optimize the charging method, because if the voltage is raised very high when it comes up, there will be a loss of electrical energy in the middle, which will be Dissipated in the form of heat energy.

　　Intelligent scheduling adjusts the voltage and current to the most suitable state for charging the device, so that the expected charging current can be reached, the power loss is minimized, and the charging efficiency is improved. The new standard reduces the voltage regulation range to 0.2V, with a minimum of 3.6V and a maximum of 20V. This charger uses the US PowerIntegrations program, which is also the first batch of platforms to obtain Qualcomm QC3.0 certification. At this stage, the chips supporting QC3.0 have been announced as Snapdragon 820, Snapdragon 620, Snapdragon 618, Snapdragon 617 and Snapdragon 430, and related devices are expected to be unveiled next year.

　　is backward compatible with 2.0 and can be separated independently

　　QuickCharge technology has been proposed for some time, but it was not until this year that more devices were supported. On the one hand, because chip manufacturers, mobile phone terminal manufacturers, and charger accessory manufacturers all need time to build this ecosystem after proposing this technology, QC2.0 can be regarded as a period when large-scale commercial use has truly begun. Since this year, more and more mobile terminals supporting QC2.0 fast charging technology have appeared, and the products of peripheral manufacturers have also begun to increase. After the launch of QC3.0, some people may wonder whether 2.0 will not apply? The answer is of course no.

　　QC3.0 is an upgrade on the basis of 2.0, which is an improvement on the technical level. In addition, it is backward compatible, compatible with 2.0, and compatible with other traditional devices such as USB charging. It can also support fast charging like the previous iPad or iPhone.　　 At the same time, QuickCharge is an open standard, so in addition to the Snapdragon processor, other processor platforms can also use this technology. For example, ASUS Zenfone2 is equipped with an Intel processor, but it also integrates the function of our QuickCharge.　　The benefits of a standalone chip

　　Qualcomm integrates the PMIC power management circuit into Qualcomm's different levels of chips. The upgrade of QC3.0 only needs to be written in the PMIC for the upgrade, so there is no additional component increase. For independent charging IC, Qualcomm will also provide, including QC2.0 and 3.0.　　 Independent charging IC can be applied to different types of chipsets. Even if this chipset does not have a power management circuit, it can also be equipped with a complete set of solutions provided by Qualcomm, which is more flexible.

　　Charging safety active defense

　　For QC's fast charging technology, Qualcomm has its own set of safety measures. One of them is called APSD (AutomaticPowerSourceDetection). The chip automatically detects the power source, identifying the direction of the power input, such as PC, power socket, USB, etc., and IP markings each power source, which can be quickly identified .

　　The next technology is called AICL (AutomacticImputCurrentLimit), which can actively identify the properties of the power adapter, such as knowing the size of the input current, and balancing the output current of the adapter and the current required by the terminal according to the size of the current, which is actually an intelligent adaptation Function. If your mobile phone can accept a maximum charging current of 2A, the chip will automatically set the current to 2A at the beginning, but if you stay at this current peak for a long time, it will be dangerous, so it will be slightly at this current height. Lower and ensure safety. In addition, Qualcomm also has a technology for the charging cable, that is, when the charging cable is short-circuited, the chip can detect it, so that the charging current will be adapted through the INOV technology to ensure that the current will not be too large or unstable. And cause damage to the mobile phone terminal.　　 QC3.0 will quickly spread early next year

　　At this stage, more than 50 terminals have used QC's fast charging technology, and more than 100 accessories have also passed certification. The competition in the accessory market is more intense than in the terminal market, including power adapters, power banks, etc., and the price war is more obvious. It is foreseeable that traditional 5V power adapters will gradually be eliminated, and consumers will choose QC-certified power accessories with the same price or lower.

　　In fact, most OEM and ODM manufacturers will be very interested in QC technology, because the battery capacity is getting larger and larger for the battery life of smart phones. If it is the traditional 5V~1A power adapter, the charging speed will be Very slow. It only takes 5 minutes to stop for 2-3 hours of battery life, which is very helpful to increase the user experience. The user experience is better, and the manufacturers are willing to do it.

　　The ecology of QC2.0 took a long time, because new modules need to be added to the mobile phone terminal chip, and the charger also needs to add a new control unit, so this requires time and capital costs. QC3.0 only made some changes on the basis of 2.0, mainly the adjustment and fine-tuning of the module. Therefore, the transition from 2.0 to 3.0 will be accelerated, so the speed of popularization will also be accelerated. It is expected that more changes will be seen from the end of this year to the beginning of next year. Launched multi-device terminals and accessories.