What is the difference between PD fast charging and general fast charging?

Difference: 1. PD fast charging is a charging protocol for USB TYPE C interface and can only be used for USB typeC interface, while general fast charging can be used for multiple interfaces (Micro-B, typeA, typeC ). 2. PD fast charging is identified through CC pin communication, while general fast charging (QC3.0/QC2.0) is identified through D and D- communication protocols. 3. The maximum supported power of PD fast charging can reach 100W, while the maximum supported power of general fast charging is 18W. 4. There is a difference between power supply equipment and application equipment.

#The operating environment of this tutorial: MIUI 13 system, Xiaomi 12 mobile phone.

As mobile phone fast charging develops better and better, fast charging includes PD fast charging and general fast charging. So what are the differences between PD fast charging and general fast charging in terms of speed and stability? How is your experience? Today we will compare and evaluate these two fast charging methods. If you are interested, come and take a look!

The difference between pd fast charging and general fast charging

1. The difference between USB interface

First of all, PD fast charging is a charging protocol belonging to the USB TYPE C interface. It can only be used for the USB type C interface. The QC3.0/QC2.0 protocol can be our common Android Micro-B interface, and USB type A interface, or USB type C interface.

2. The communication identification channels of fast charging are inconsistent.

PD fast charging is not identified through D and D- communication protocol. Note: PD fast charging is not The communication protocol is identified by D, D-. PD fast charging is communicated and identified through the CC pin.

QC3.0/QC2.0 is identified by D, D- communication protocol. Micro-B is also used to distinguish the two fast charges. In the USB type C interface, we know that there are also D and D- pins. USB type C can be used as a dual-compatible product for PD fast charging and QC fast charging. Micro-B and USB TYPE A can only support QC3.0/QC2.0 protocol.

3. Difference in charging power of power supply

QC3.0/QC2.0 fast charging is the earliest high-voltage fast charging protocol, and the charging power is generally 18W.

PD fast charging is currently the most complete fast charging protocol. The maximum supported power can reach 100W. Currently, common powers are 18W, 30W, 45W, 60/65W, etc.

4. Differences between power supply equipment and application equipment

QC3.0/QC2.0 application equipment such as: mobile phones, power banks, and other belts with a power of about 18W USB port lithium battery charging equipment

PD fast charging has DFP (power supply mode), DRP (power supply/device bidirectional mode), and has the unity of USB interface functions, high power and other characteristics. The scope of application equipment is very large and there is a lot of phenomenon space.

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