Nowadays electronic products pay more and more attention to the user experience. The mobile processors that produce a new generation of smart phones and tablet computers have faster and powerful computing speeds, more and more cores, in other words battery squeeze faster. it makes fast charging is important. Also we live in a quick rhythm world, it makes time safe economy nowadays. Therefore, higher requirements are put forward for the power management of mobile terminals. As a result, major mobile processor platform manufacturers (Qualcomm and MediaTek, etc.) have introduced corresponding fast charging solutions, which require the configuration of fast charging chips on portable electronic devices to achieve high-voltage and high-current fast charging.

Qualcomm Quick Charge:
Qualcomm QuickCharge1.0,
Qualcomm QC1.0: The output specification is 5V/2A, which is basically the Snapdragon 600 platform.
Qualcomm Quick Charge 2.0,
Qualcomm Quick Charge 2.0 technology is an upgraded version of Quick Charge 1.0 and adopts a new specification. Increase the charging speed by simultaneously increasing the current and voltage.

Advantages of Quick Charge 2.0:
Its technical compatibility and inheritance are relatively good. The external interface adopts the general USB standard, and there is no need to purchase a special cable. The mobile phone without fast charging function can still use the QuickCharge2.0 charger. Charge in the normal way.

Disadvantages of Quick Charge 2.0:
There is relatively large heat on the side of the mobile phone, and the charging speed is slightly slower.

Qualcomm Quick Charge 3.0:

Qualcomm claiming that QC 3.0 compared with Quick Charge 2.0, test result shows that the fast charging speed can be increased by up to 27% and the power loss can be reduced by up to 45%. According to the official introduction of Qualcomm, in terms of charging options, Quick Charge 2.0 provides four fixed charging voltages of 5V, 9V, 12V and 20V.
After Quick Charge 3.0 adopts the INOV optimal voltage smart negotiation algorithm, it uses 200mV increments as the first gear, providing a flexible choice of voltage from 3.6V to 20V.
This will allow mobile terminals such as mobile phones to obtain the right voltage to achieve the expected charging current, thereby minimizing power loss, increasing charging efficiency and improving thermal performance. Now the combination of fast charging technology and USB Type-C pushes usability and practicality to a new level.
Qualcomm Quick Charge 3.0 has been officially launched and will be available as an option in some Qualcomm Snapdragon processors, including Snapdragon 820, 652, 650, 625, 617, 435 and 430 processors. Currently, Xiaomi, LeTV, HP, and LG have also launched new mobile phones that support Quick Charge 3.0 fast charging technology.


Qualcomm Quick Charge 3.0+ New QC Charging is Coming in 2020 New Phones!

Qualcomm Snapdragon 765 & Snapdragon 765G will support Quick Charge 3+, followed by coming new Snapdragon(865 5G might support it too) platforms across tiers in 2020.
Quick Charge 3+ bringing lots of advantages for fast charging and also give user at a lower price point:
Fast Charging and better efficiency: 0%-50% in 15 minutes, 35% faster and 9 degrees Celsius cooler.
Quick Charge 3+ will support industry standard USB type A-to-type C cables and accessories that support scalable voltage with 20mV steps from Quick Charge 4, which are more affordable for OEMs & consumers
Quick Charge 3+ is backward compatible with previous-generation Quick Charge devices and newer devices can work with Quick Charge 3+ accessories.
Other key features: Integrated cable power capability/identification, various safety mechanisms

MediaTek PumpExpress/PumpExpress Plus
MediaTek launched its own fast charging technology-PumpExpress. PumpExpress features: allow the charger to determine the initial charging voltage according to the current, and the PMIC output pulse current command is transmitted to the charger through the USB Vbus. The charger follows this command to adjust the output voltage, and the voltage is gradually increased to 5V to reach the maximum charging current .
Pump Express:
The output power provided by the fast DC charger is less than 10W (5V), controlled output voltage: 5V/4.8V/4.6V/4.4V/4.2V/4.0V/3.8V/3.6V, mainstream output power: 5V/1A & 5V/1.5A
Pump Express Plus:
The output power provided by the charger is greater than 15W, and the difference is that the controlled output voltage has three levels of 12V, 9V and 7V, which are 12V / 9V / 7V, 5V / 4.8V / 4.6V / 4.4V, 4.2V / 4.0 V / 3.8V / 3.6V.
Pump Express 3.0:
Charge your Phone from 0~70% in 20 minute!
The user only needs to charge for five minutes, and the phone can talk for up to four hours. MediaTek said that this speed is almost twice that of the current competing solutions on the market, and it is five times faster than traditional charging technology. In addition, Pump Express 3.0 is the world’s first fast charging solution that uses a USB Type-C interface for direct charging. Direct charging can bypass the charging circuit inside the phone, and the current of the power adapter flows directly to the battery, thus effectively preventing the phone from getting hot when charging.
The main feature enhancements of Pump Express 3.0 include: faster charging speed, higher charging efficiency, and lower phone temperature during charging. Through direct charging, the power consumption of Pump Express 3.0 is reduced by up to 50% compared to Pump Express 2.0. It is currently mainly used in high-end platforms such as MTK MT6757 and MT6797.
Pump Express 4.0:
Usually there are mobile phones that support fast charging and wireless charging are using separated charging protocols. For wired charging protocol supports QC, USB PD etc…and wireless charging is based on “Qi” Mainly. Finally MediaTek combine these two technologies together and calls it Pump Express 4.0.
MediaTek Pump Express 4.0 cuts cell phone battery energize times by finished half,(up to 75 percent charge in around 30 minutes.) contrasted with a standard USB charger. It underpins the most recent USB-C link standard, with up to 5A of current.
Pump Express 4.0 is also workable with USB PD 3.0 charging programmable Power Supply.
USB Power Delivery Specification, USB Type-C / USB PD
“USB Power Delivery Specification (USB PD)” is a standard that use a USB interface to achieve a maximum power supply of 100W. At present, the USB PD standard is divided into five “specifications” of 10W, 18W, 36W, 60W and 100W. The voltage uses 5V, 12V and 20V, and the current is 1.5A, 2A, 3A and 5A. Such a flexible configuration allows various electronic devices to be It can meet the power supply needs through a USB cable, not only can power mobile devices, but also directly power notebooks and monitors, and it can achieve two-way charging, which means that two computers can be connected to each other with USB cables.

The USB PD standard can support devices with different voltages within 100W. 5V、9V、12V、20V and integrates power and signals into the same line, so in addition to charging mobile phones and tablets, it can also be used for laptops that could not pass before USB power supply is used for fast charging of drive devices.
Apple’s new MacBook is implemented using “USB Type-C” + “USB PD”. With the support of the two giants of Google and Apple, the “USB Type-C” + “USB PD” standard is very promising to become a unified standard in the future. All digital devices such as smart phones, tablets, and notebooks can be universal.