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Fast Charge QC1.0-QC4.0 Development, QC2.0 Charge Difference With QC3.0
Mar 31, 2018

Rapid charging technology is changing with each passing day. Today, the charger market is contending, Qualcomm QC fast charging still dominates the market. QC fast charge has now developed into the fourth generation, and each generation has revolutionary progress. Shortening the time from QC1.0 to QC4.0 will inevitably make the masses complain.

It is also because the old driver of Qualcomm stepped on the gas pedal to ride the dust, and the product's iteration speed could not keep up, so that products carrying QC1.0, QC2.0, and QC3.0 technologies were circulated on the market at the same time. Just like the new version of the renminbi issuance, the old version of the renminbi is still in circulation, but there are still people who can't justify it with the Kangxi-Tongbao. So what's the big change from QC1.0 to QC4.0? Here's a comparison.

NOKIA era, a 800mAh battery is not a problem for two or three days, so with 5V0.5A charger is fully enough, two or three hours will be able to fill, if it is Nokia rule planet, there is no QC fast charge what Things.

After 2010, large-screen smart machines represented by Andrews became popular, and the battery capacity was turned several times. 2000mAh has become standard (the current maximum has broken 6000mAh). If it is still 5V0.5A charging, it is “recharge for two hours, call 5 minutes, so the charging power must be increased. How much increase? First 5V1A it. But still not enough, ah, USB-IF stood out and said: "Try 5V1.5A." Or small, this time Qualcomm said: "We have to 5V2A." So QC1.0 came out.

QC1.0: Voltage and Current Boost to 5V2A, 40% Reduction in Charging Time

As the era continues to advance, large-screen smart phones have begun to burst, battery life is not keeping up, and fast charging has become one of the magic tools for manufacturers to improve user experience. So QC 2.0 was born.

QC2.0: Compared to the old standard, QC2.0 has changed the charging voltage epoch-makingly, and has increased from the conventional 5V that has been maintained for many years to 9V/12V/20V, keeping the same value as QC1.0 and achieving 18W at 2A. Power power transmission, and the wire can be used without special treatment of old wire.

Increasing the voltage, the power is up, but the efficiency is reduced. Every time the voltage is increased by one step, the efficiency is reduced by about 10%. Most of these energy are converted into heat, so the 20V voltage line is almost no one used, only retaining the three files of 5V, 9V, and 12V. Even if it is still not hot, Qualcomm also feels that the 5V to 9V step is too big to pull the egg a bit, so you can adjust it continuously in 0.2V units until you find the most suitable voltage. How much is the most suitable voltage? Qualcomm has its own uniqueness. The voltage intelligence negotiation (INOV) algorithm, which is QC3.0.

QC3.0: Based on the QC2.0 9V/12V voltage, further subdividing the voltage file, adopting the unique INOV algorithm, setting the voltage to 200mV as the first gear, and testing the lowest voltage to the highest 3.6V voltage of 20V, and Backward compatible with QC2.0. Thanks to the full use of the Type-c interface instead of the original MicroUSB interface, the maximum current is also increased to 3A, because the voltage is lower and the efficiency is increased by up to 38%, the charging speed is increased by 27%, and the heating is reduced by 45%.

QC3.0 is good, but Google does not agree, ah, Qualcomm alone to engage in a set of how to do, with my system must give me the USB PD protocol, arm twisted thigh, Qualcomm wear soft, and launched QC4.0.

QC4.0: Increase power to 28W again and add USB PD support. Cancellation of the 12V voltage range, 5V maximum output 5.6A, 9V maximum output 3A, and voltage files continue to subdivide 20mV as a file