What is the difference between USB type C PD fast charging and QC3.0, QC2.0 fast charging?

1. The difference between the charging power of the Power Supply
2. The difference between power supply equipment and application equipment
3. The difference between the USB interface
4. The communication identification channel of fast charging is different

One: The difference between USB interface
First of all,

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

Two: The communication recognition channel of fast charging is inconsistent

PD fast charge is not recognized by D+, D- communication protocol. Note: PD fast charge is not recognized by D+, D- communication protocol.

PD fast charging is identified by communication via CC pin.
QC3.0/QC2.0 is synchronous D+, D- to identify the communication protocol. Micro-B

This is also to distinguish between the two fast charging. In the USB type C interface, we know that there are also D+ and D- pins. Yes, yes, USB type C can be used for both PD fast charging and QC fast charging. The product. Micro-B and USB TYPE A can only do QC3.0/QC2.0 protocol.

Three: The difference between the charging power of the power supply
QC3.0/QC2.0 fast charge is the earliest high-voltage fast charge protocol, the charging power is generally the highest at 18W
PD fast charge is currently the most complete fast charge protocol, the maximum supported power can reach 100W, the current common power is 18W, 30W, 45W, 60/65W, etc.

Four: the difference between power supply equipment and application equipment
QC3.0/QC2.0 application equipment such as: mobile phones, power banks, and other lithium battery charging equipment with a USB port with a power of about 18W
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 room for phenomena.

In fact, the difference between PD fast charge and QC3.0 fast charge is really very big, such as: test tools, test methods, no-load performance. . . And so on are all different. For those who are new to contact, these 4 points must be understood.

Best regards,

Mandy Huang.