The difference between PD fast charging and QC fast charging

1.Which one is better, PD fast charging or QC fast charging?
What is the PD fast charging protocol? The full name of PD should be called USB Power Delivery Specification, which is a fast charging standard introduced by the USB standard organization. This fast charging standard has been running for several years. USB PD has now reached version 3.0. The PD fast charging we are talking about now usually refers to PD 3.0. Like iPhone 8 and iPhone X, it supports PD3.0 protocol.

QC fast charging is a fast charging technology dominated by Qualcomm. The working principle of QC fast charging technology is to increase the output voltage under the condition of the charging current limit, and further increase the maximum charging power, which greatly shortens the charging time.

2.The difference between PD fast charging and QC fast charging

(1).The difference between the USB interface

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

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

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

QC3.0/QC2.0 is synchronous D+, D- to identify the communication protocol. Micro-B

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

(3). The difference between the charging power of the power supply

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

PD fast charging is currently the most complete fast charging protocol, the maximum supporting power can reach 100W, and the current common power is 18W, 30W, 45W, 60/65W, etc.

(4). The difference between power supply equipment and application equipment

QC3.0/QC2.0 application equipment such as: mobile phone, power bank, lithium battery charging equipment with USB port with power of about 18W

PD fast charging has DFP (power supply mode), DRP (power supply/device bidirectional mode), and has the uniformity of USB interface functions, high power and other characteristics. The scope of application equipment is very large, and there are many phenomenal spaces.