What is Qualcomm Quick Charge?

September 2019 (Updated 2020)

Qualcomm are known for their widely adopted Snapdragon processors. Boasting the most-supported fast-charging standard, their Quick Charge (QC) standard can be found in hundreds of devices.

 

But what is Quick Charge? How does it work? What versions are there?

Requirements

  • Device that supports Qualcomm Quick Charge
  • Charger that supports Qualcomm Quick Charge

Note: Although Qualcomm Quick Charge versions are backward compatible, if a later QC version charger or device is used with an older QC version charger or device, the device will charge at the slower rate.

How does it work?

When you connect a QC charger to a device that supports the QC charging standard, the charger initially supplies the device with the standard 5 Volts, traditionally found in USB devices.

It speaks with the device

After being plugged in, the charger communicates with the QC device, asking for the device’s maximum supported charging voltage. The QC device responds by communicating this information to the QC charger.

It dynamically adjusts to suit the device

Having received the charging specifications from the device, the charger begins to dynamically adjust its voltage output, supplying the best charging voltage for the device to charge to 50% power as fast as possible. Qualcomm Quick Charge (Version 3.0 onward) can support all voltages between 3.6-20V.

What are the different versions of Qualcomm Quick Charge?

There are currently six versions of the Quick Charge, each are backwards compatible (see table). The later versions also support USB Power Delivery (USB-PD: Another fast-charging standard). Unfortunately there aren't any clear guidelines published on Qualcomm's website, so the table below should be taken with a pinch of salt, as the information was gathered from multiple sources.

Version (Year) Voltage Support Max Current Max Power Claimed Charging Rate Features Device Examples
Qualcomm Quick Charge 1.0 (2013) 6.3V 2A 10W Charge a smartphone up to 50% in 60 minutes

Auto Input Current Limit

Auto Power Source Detection

Not listed by Qualcomm
Qualcomm Quick Charge 2.0 (2014)

Class A: 5V/9V/12V

Class B: 5V/9V/12V/20V

3A 36W Up to 75% faster than standard charging

High Voltage Dedicated Charging Port (HVDCP)

Dual Charge (Optional)

Samsung Galaxy S6-S10[+] Range

HTC One M8/M9

Sony Xperia Z2-Z5 Range

Qualcomm Quick Charge 3.0 (2016)

3.6V - 22V

(200mV increments)

2.6A or 4.6A 36W Charge a smartphone up to 80% in 35 minutes

HVDCP+

Dual Charge+ (Optional)

Intelligent Negotiation for Optimum Voltage 1.0 & 2.0 (INOV)

Sony Xperia XZ Range

HTC U11 range

Xiaomi Mi Max-Max 3

Qualcomm Quick Charge 4.0 (2017)

Quick Charge

3.6V - 20V (20mV increments)

Quick Charge

2.6 or 4.6A

Quick Charge

100W

Charge smartphone up to 50% in 15 minutes

HVDCP++

Dual Charge++ (Optional)

INOV 3.0

Battery Saver Technologies 2

USB-PD Compatible

 

Samsung Galaxy A70/A80

Xiamo Mi Mix 3/Mix 3 5G

Asus Zenfone 6

Razer Phone/Phone 2

USB-PD

5V/9V

USB-PD

3A

USB-PD

27W

Qualcomm Quick Charge 4.0+ (2017)

Quick Charge

3.6V -20V

(20mV increments in QC)

Quick Charge

2.6 or 4.6A

Quick Charge

100W

Dual Charge++ (Not Optional)

Intelligent Thermal Balancing

Advanced Safety Features

 

USB-PD

5V/9V

USB-PD

3A

USB-PD

27W

USB-PD Devices Only
Qualcomm Quick Charge 5 (2020) Pending Pending 100W+ Charge a 4,500mAh battery to 50% in 5 minutes Pending Pending

Conclusion

If your device is compatible with Qualcomm Quick Charge, be sure to check the version of the device and any other devices you may own. Purchase chargers supporting the later versions of Quick Charge where possible, as this will allow you to take advantage of the fastest charging rate supported by your current devices, and any future QC devices you may own.