The difference between QC, PD and SCP that customers should know

November 24 16:52 2021

Nowadays, there are various fast charging solutions for smart phones in the market. Large-power mobile phone chargers exactly bring faster charging speed for mobile phones.

Meanwhile, different quick charging protocols adopted by different manufacturers also lead to the issue of versatility between different mobile phones models and phone chargers. In order to realize fast charging, it is necessary to use the matching charger and USB charging cable, which not only becomes troublesome to charge, but also causes waste to consumers.

The question of whether the fast charging devices can be universal lies in the quick charging protocol. If is authenticated between the two protocols, the fast charging can be realized by shaking hands. Simply speaking, the phone is integrated with power management IC, and the charger is also integrated with a special identification IC. When the phone and the charger are connected through the USB cable, the two IC chips can identify and authenticate each other and successfully “shake hands” before activating the fast charging function. If authentication between IC chips fails, the charger can only keep the normal output.

Currently, the common fast charging Protocols on the market like Huawei SCP/FCP, Qualcomm QC, (such as some Android mobile phone:mi), PD (representing mobile phone iPhone), VOOC of OPPO, and Vivo Flash Charge.

The full name of Huawei’s SCP Fast Charge Protocol is Super Charge Protocol, while the full name of FCP Fast Charge Protocol is Fast Charge Protocol. In the early stage, Huawei adopted the FCP fast charging protocol, which was characterized by high voltage and low current. For example, the early 9V2A 18W was used in Huawei Mate8 mobile phone. Later, it was upgraded to SCP protocol to realize fast charging in the form of big current.

OPPO is the mobile phone manufacturer to start fast charging mobile phones in China in the earlier time .VOOC1.0 was issued in 2014 with charging power of 20W. In 2020, Oppo came up with 125W flash charging technology. OPPO mobile phones use their own VOOC protocol, adopt low voltage/high current fast charging solution. (Related article about fast charging solutions:

PD3.0 phone charger

Vivo’s Flash Charge is also designed with dual Charge pump and dual battery cells. At present, the maximum charging power has been developed to 20V/6A 120W. The 4,000mAh lithium battery can be charged 50% in 5 minutes and fully charged in 13 minutes. In this aspect of mobile phone charging, OPPO and VIVO’s technology is relatively advanced.

The full name of USB-PD fast charging protocol is USB Power Delivery, which is a fast charging specification developed by USB-IF organization and is one of the mainstream fast charging protocols at present. Apple is one of the originators of the USB PD fast charging standard, so there are now iPhones that support fast charging, and they use the USB-PD fast charging protocol.

The relationship between USB-PD protocol and other fast charging protocols, are like including and be included. At present, USB-PD 3.0 protocol has already included Qualcomm QC 3.0 and QC4.0, Huawei SCP and FCP, MTK PE3.0 and PE2.0, as well as Oppo’s VOOC.Therefore, from the whole point of view, USB-PD fast charging protocol has more unified advantages.

It is because the fast charging protocols of different mobile phone manufacturers are mostly based on their own fast charging protocols, it can not fully bring the convenience of fast charging. Once the agreement reached between fast charging Protocols, all consumers can use only one fast charger for different brands of mobile devices.

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