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Qualcomm Quick Charge 2.0 technology explained

2015年6月30日

Qualcomm products mentioned within this post are offered by Qualcomm Technologies, Inc. and/or its subsidiaries.

Much has been said about the advantages of Qualcomm Quick Charge 2.0, and the rapidly expanding ecosystem of Quick Charge devices and adapters supported by carriers, retailers, and device and accessory manufacturers. We’ve provided FAQs before but there are still many questions for those in the community eager for a deeper explanation of super-fast battery charging technology.

Traditional USB charging is limited to 5 volts and less than 2 amps. In addition, the actual power available for battery charging will be less than 7.5 watts, taking into account losses in the system as well as cables and connectors.

Enter Qualcomm Quick Charge 2.0. Designed to be scalable across different classes of electronics, it is 100% compatible with how charging is done today. Quick Charge 2.0 is connector independent. It requires the D+/D- data lines and can work with USB Type-A, USB micro, USB Type-C and other proprietary connectors. Over 20 OEMs already support this technology and more than 70 accessories are currently available (download PDF list).

Unlike conventional USB charging methods, a Quick Charge 2.0 end-to-end solution takes advantage of higher power levels to quickly and effectively charge devices. Quick Charge 2.0 Class A can provide up to 24 watts over a micro USB connector, 36 watts with a Type-C connector, and Class B can reach 60 watts or more. Future charging advancements are expected to show even further improvement.

With multiple levels of voltage limiting, current limiting and temperature protection, Qualcomm Quick Charge 2.0 is uniquely designed to ensure healthy battery life cycles regardless of connector. All of this is integrated in Quick Charge 2.0 components – no need for external ones.

Implementing Quick Charge 2.0 is often a simple, low-cost charging solution. It’s already implemented into many Qualcomm Technologies PMICs (power management integrated circuits), where it is verified and tested for a mobile device, whereas other solutions require more space on the PCB for extra circuitry.

This patented technology is designed to use noise-free data lines for effective handshaking and communication, while enabling high-efficiency transfer of electricity. Qualcomm Quick Charge 2.0 is fast, effective and follows a comprehensive certification process. And new, exciting technologies for battery management are still to come as Qualcomm Quick Charge delivers improved charging solutions for smartphone users.

Qualcomm Quick Charge and Qualcomm Snapdragon are products of Qualcomm Technologies, Inc.

Geoff Gordon

Staff Manager, Product Marketing, Qualcomm

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