OnQ Blog

How can Quick Charge 4+ turbocharge your mobile device? [video]

The “one charging solution for all” boosts speed, efficiency, and safety with powerful new features

Feb 23, 2018

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

Know that refreshed feeling you get after a quick power nap? With Qualcomm Quick Charge 4+ technology, your smartphone can experience a similar “restorative” effect.

Learn more about Quick Charge

Qualcomm Technologies continues to be a leader in power management, and we’re excited to extend this with Quick Charge 4+, designed to deliver the ultimate fast-charging performance for mobile devices. Quick Charge 4+ is our fourth-generation fast charging solution that features all the benefits of Quick Charge 4 and more, such as Dual Charge and Battery Saver, created to add speed and safety, while reducing charging thermals.

What Quick Charge 4+ really offers is the speed of convenience. Even though Qualcomm Snapdragon-powered devices are very energy efficient and just sip your power, once in a while, your battery does get depleted. With Quick Charge 4+ technology, an enabled device can get up to a 50 percent charge in only 15 minutes1.

One charging solution for all

Is your Snapdragon-powered device one of many that features Quick Charge? If not, never fear – we have you covered. Quick Charge 4+ chargers enable devices to be charged without Quick Charge technology or Snapdragon architecture inside them. This is possible because Quick Charge 4+ supports USB Power Delivery (USB PD) as its primary signaling method, which is a communication protocol used by many of today’s smartphones. This enables Quick Charge 4+ to offer a “one charging solution for all” experience. So, if your device doesn’t have Quick Charge technology inside it, but it does employ USB PD, you can still use a Quick Charge-enabled charger and improve your charging experience.

There are a wide variety of charger accessories available from smartphone and third-party manufacturers. This opens the door for you to select Quick Charge 4+ as your charger technology of choice. How do we stack up? Ventev, a global manufacturer of charging accessories, compared the charging performance of their Quick Charge 4+ wall charger, available soon, against chargers included in the box or sold by device manufacturers that use other fast charging methods. Their test results revealed that their Quick Charge 4+ adapter charged the devices at the same rate, or faster.

Dual Charge keeps your device cool

Dual Charge technology, exclusive to Quick Charge, is enabled by including a second power management IC in the device (i.e. a smartphone). Charging a device via Dual Charge divides the power, allowing for lower power and thermal dissipation, and reduced charge time, without performance tradeoffs.

With traditional charging, as your phone charges, the power flows through a single power path, which can cause your phone to receive less power to avoid excess heat, thereby lengthening your charging time. To address this thermal management issue, Dual Charge prescribes two paths, autonomously splitting between two lines, spreading the charge to create cool paths for power delivery. Through intelligent thermal balancing, Quick Charge 4+ can further reduce the overall heat dynamically, as it ensures power and thermal balance between the power paths.

For example, let’s say your phone is able to charge at up to 16 watts. Instead of sending that 16 watts through a single path, Quick Charge 4+ with Dual Charge technology splits it up between the two paths, so each path only needs to service a portion of the total output. Intelligent thermal balancing dictates how much power to put through each line, dynamically adjusting the flow to deliver the optimal amount of power to the battery. This allows the phone to charge up to 3 degrees centigrade cooler at a consistent pace, resulting in a faster charge (than the previous generation). Intelligent thermal balancing allows higher power levels to be utilized from a power source, significantly reducing charging time, especially during high power system use cases.

Battery Saver stretches your battery’s life

Quick Charge 4+ includes Battery Saver technology to regulate battery performance over time. Essentially, it protects and extends the useful life of your battery while also helping to ensure the overall safety of your device. Protection is implemented at multiple levels simultaneously and throughout the entire charging process to help measure voltage, current, and temperature accurately while protecting the battery, system, cables, and connectors, extending the battery cycle life.

Safety begins with communication. Your device and charger acknowledge each other when connected. As your device indicates the exact amount of power it needs, the charger delivers it. During the charging process, there’s back and forth communication to monitor the amount of power that’s flowing into your device. Your charger will autonomously decide how much power to deliver as your battery approaches full charge. This layer of intelligent charging helps prevent over charging and regulates current throughout every charge cycle.

Quick Charge 4+’s power delivery is very precise, having evolved finer and finer delineation for delivering voltage to the portable device. Quick Charge 2.0 delivered either 5, 9, or 12 volts into a mobile device. With Quick Charge 3.0, power is delivered in 200mV increments. With Quick Charge 4, this is reduced to 20mV. What does this mean for you? It helps improve charge efficiency and lessens the wasted power.

Building the Quick Charge ecosystem

Quick Charge’s continued success stems largely from collaborating with companies like Ventev, Ever Win, and Portway, each of which will offer Quick Charge 4+ accessories. We’re also excited to be working with top-tier suppliers like Cypress, NXP, and Weltrend, each having certified Quick Charge 4+ power controllers.

Quick Charge 3.0 or 2.0 are designed into over 150 devices. OEMs supporting Quick Charge include Samsung, LG, HTC, Xiaomi, Sony, and ZTE. And with more than 600 accessories of various types available, including wall and car chargers, battery banks, and USB hubs, Quick Charge remains the number one method for fast charging2.

Want to charge really fast? Pairing a certified Quick Charge 4+ charger with a Quick Charge-enabled device is the surest way to attain the fast speeds enabled by the manufacturers that support Quick Charge in their devices. The Nubia Z17 and Razer Phone are the first devices to integrate Quick Charge 4+. Be sure to look for Quick Charge 4+ in your next mobile device.

1. Based on internal tests charging a 2750mAh fast charge battery and using the maximum power for a thermal limit of 40C for all charging implementations. Charge time based on 0% to 50% utilizing 2017 charging Implementations (September 2016). Certain Snapdragon mobile platforms are designed to allow devices to support 50% battery life with 15 minutes charging. Actual results may vary depending on device design.
2. QTI Research based on review of available Quick Charge devices and accessories against other fast charging technologies.
Qualcomm Snapdragon and Qualcomm Quick Charge are products of Qualcomm Technologies, Inc. and/or its subsidiaries.

Opinions expressed in the content posted here are the personal opinions of the original authors, and do not necessarily reflect those of Qualcomm Incorporated or its subsidiaries ("Qualcomm"). Qualcomm products mentioned within this post are offered by Qualcomm Technologies, Inc. and/or its subsidiaries. The content is provided for informational purposes only and is not meant to be an endorsement or representation by Qualcomm or any other party. This site may also provide links or references to non-Qualcomm sites and resources. Qualcomm makes no representations, warranties, or other commitments whatsoever about any non-Qualcomm sites or third-party resources that may be referenced, accessible from, or linked to this site.

Geoff Gordon

Staff Manager, Product Marketing, Qualcomm Technologies, Inc.