Fast charging technology has been praised since its launch. In the current era of large-screen mobile phones, battery capacity has also increased. The speed of mobile phone charging cannot be as good as in the past, so manufacturers have developed new charging technologies to enhance the consumer experience. Level.
As early as last September, Qualcomm launched the third generation fast charging technology - QuickCharge 3.0 (hereinafter referred to as QC3.0). QC3.0 is an upgrade based on 2.0. It is an improvement on the technical level, which is more efficient than the previous generation. Increased by 38%, charging speed increased by 27%, and heat decreased by 45%. From the above data, QC3.0 has a great improvement in charging temperature control, and this will ensure product safety to a certain extent. .
Quick Charge 3.0 also brings a number of enhancements: Flexibility is enhanced with Quick Charge 2.0, especially in terms of charging options. Quick Charge 2.0 offers four-speed charging voltages of 5V, 9V, 12V and 20V, and Quick Charge 3.0 is available in 200mV increments, offering flexible options from 3.6V to 20V. This will allow the phone to get the right voltage to the desired charge current, minimizing power loss, improving charging efficiency and improving thermal performance.
Backward compatible with 2.0 and can be separated independently
QC3.0 only made some changes on the basis of 2.0, mainly the fine-tuning of the module. In addition, it is backward compatible, compatible with 2.0, and compatible with other traditional, such as USB charging devices, can also support fast charging like the previous iPad or iPhone.
At the same time, QuickCharge is an open standard, so other processor platforms can use this technology in addition to the Opteron processor.
The benefits of a stand-alone chip
Qualcomm's PMIC power management circuit is integrated in Qualcomm's different levels of chips. The upgrade of QC3.0 only needs to be written in the PMIC for upgrade, so there is no increase in redundant components. For independent charging ICs, Qualcomm will also offer, including QC2.0 and 3.0.
Independent charging ICs can be used with different types of chipsets. Even if this chipset does not have a power management circuit, it can be equipped with a complete solution provided by Qualcomm, which is more flexible.
Charging safety active defense
For QC's fast charging technology, Qualcomm has its own set of security measures. One of the technical names is called APSD (AutomaTIcPowerSourceDetecTIon). The chip automatically detects the power supply and identifies the direction from which the power input is coming from, such as PC, power socket, USB, etc., IP marking each power source, and can quickly identify it. .
Subsequent technology called AICL (AutomacTIcImputCurrentLimit), which can actively identify the properties of the power adapter, such as knowing the size of the input current, balancing the current output of the adapter and the current required by the terminal according to the current, which is actually a smart adaptation. Features. If your phone can accept up to 2A of charging current, the chip will automatically set the current to 2A at first, but if it is at this peak for a long time, there will be some danger, so it will be slightly at this current level. Reduce and ensure safety.
In addition, Qualcomm has a technology for the charging line, that is, when the charging line is short-circuited, the chip can be detected, so the charging current will be adapted by the INOV technology to ensure that the current is not too large or unstable. The phone terminal is damaged.
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