Fast charging is one of the key technologies that have made the fastest progress on mobile phones in the last year or two. Various 40, 50, and even 65W fast charging schemes can be described as blooming. Before that, Xiaomi OPPO, iQOO and realme also released 100 watt level fast charging schemes, further reducing the charging time to less than 20 minutes. However, the increasing charging power and speed also brought a major problem - private protocol fast charging developed by various companies is difficult to use.

Two or three years ago, many domestic Android phone manufacturers used Qualcomm's 18W QC3.0 public solution. However, since then, Qualcomm's QC4 and QC4+have limited improvement in charging speed, which has been difficult to meet the growing requirements of manufacturers. Just when the QC scheme has not attracted much attention, Qualcomm suddenly released the new QC5 (Quick Charge 5) fast charging scheme last night (July 27).

Qualcomm officials said that compared with the QC4 scheme, the charging efficiency of QC5 is improved by 70%, supporting 100W+charging power. For a 4500mAh battery, the QC5 scheme can be charged from 0 to 50% in 5 minutes, and fully charged in 15 minutes. The charging speed is increased by 4 times, and the charging temperature is reduced by 10 ℃.

It is reported that QC5 is developed based on the PD-PPS protocol. The charging head uses the USB-C port for output, allowing a maximum input voltage of 20V. The fast charging of 100W is achieved by connecting two cells in series inside the mobile phone, and the charging power of a single cell is limited to 45W; It supports adaptive input voltage, the fourth generation optimal voltage intelligent negotiation (INOV4) algorithm, Qualcomm Battery Saver battery health management, and the new Qualcomm adapter power intelligent identification technology.

In terms of safety, QC5 supports 12 gear voltage, current and temperature protection, such as 25V USB input overvoltage protection and external charging power control above 30V.

In terms of compatibility, QC5 will be compatible with QC2.0, QC3.0, QC4, QC4+, USB-PD and PPS protocols.

Qualcomm also launched a new generation of PMICs (power management integrated circuits), SMB1396 and SMB1398, to achieve the best performance of QC5.

Officially, the devices that support QC5 will be launched in the third quarter of this year. At present, only the flagship platform of Snapdragon 865 or Snapdragon 865 Plus can support it.

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