What is Quick Charge (QC)? QC 4.0 brings the next generation of high-speed charging technology

These two are two of the fastest evolving charging technologies for mobile devices. This blog focuses on Qualcomm’s Quick Charge (QC) technology and explores its evolution. QC is also an innovative technology that dramatically speeds up the charging of mobile devices. And with the advent of QC 4.0, its speed and efficiency have reached new heights. Below are some details about QC technology and its evolution.

A. QC Basics
“What is Quick Charge (QC)?”
QC is a charging technology found in Qualcomm SoCs. It is a technology that allows mobile device batteries to be charged faster than regular USB charging. QC also manages power through the USB port. It then delivers more power than the normal USB rate. This allows the device’s battery to charge quickly.

B. What is QC 3.0?
“How fast is QC 3.0 compared to QC 2.0?”
It is a charging protocol designed by Qualcomm. Thus, it provides graduated multi-voltage charging from 3.7V to 20V. Also, when compared to QC 2.0, QC 3.0 charges with higher efficiency; QC 2.0 uses a fixed multi-voltage and charges in stages. However, QC 3.0 can regulate the exact voltage, resulting in more efficient charging.

C. The Emergence of QC 4.0
“What is new about QC 4.0?”
QC 4.0 is a new evolution of QC technology; QC 4.0 brings a variety of improvements over QC 3.0. One of the new features is Dual Charge. It splits the charging current into two power management ICs to reduce charging time. QC 4.0 also introduces “Intelligent Thermal Balancing”. Thus, overheating is prevented. New safety features have also been added to improve device safety.

D. Advantages of QC 4.0
“How is QC 4.0 superior to QC 3.0?”
QC 4.0 has faster charging speeds and improved efficiency: compared to QC 3.0, QC 4.0 charges up to 20% faster. It also stays cool during charging.QC 4.0 uses a 28W quick charge method. Thus, it also has dual charge technology.

E. How to utilize QC 4.0
“How can I take advantage of the advances in QC 4.0?”
QC 4.0 offers very fast charging speeds. Thus, it promises to be able to charge at temperatures as low as 5°C. In addition, tests with reference devices show that they can be charged at an astonishingly fast rate. Thus, a 5-minute charge provides 5 hours of power. Thus, even for devices with larger capacity batteries, up to 50% of the capacity can be charged in 15 minutes.

F. Difference between QC and USB-C Power Delivery
“How do I distinguish between QC and USB-C Power Delivery?”
Q is a different protocol. QC is also a proprietary technology and is designed primarily for mobile devices. USB Power Delivery, on the other hand, is a standard protocol from the USB-IF standard and is suitable for larger devices. However, QC 4.0 is compatible with USB-PD, allowing for faster charging and understanding of PD language.

G. PD and Quick Charge 4.0 work together
“How do PD and Quick Charge 4.0 work together?”
QC 4.0 is capable of understanding the PD language and provides control to the device’s thermal budget. Thus, QC and USB-PD can coexist in a protocol regarding voltage and current negotiation; QC 4.0 works with USB Type-C to provide fast and safe charging.

Quick Charge (QC) technology dramatically improves the charging experience for mobile devices. And with the advent of QC 4.0, charging will be faster, more efficient, and safer. So, it’s up to the user to understand the difference between QC and USB Power Delivery and take full advantage of QC 4.0. This will significantly reduce the time it takes to charge your device’s battery and improve your everyday mobile experience.

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