Introduction to USB Type-C, USB PD and QC3.0

USB Type-C is a next-generation universal serial bus connector, port and cable specification that supports bidirectional power and forward and reverse insertion, supports higher charging power and data transfer rates up to 10 Gbps, and is increasingly used in portable applications. device.

USB PD full name USB Power Delivery, which is a USB power transfer protocol, supports data communication and power transmission up to 100 W. It supports 5 V@3A by default when booting, and can be adjusted to 27 W, 45 W, 60 W, 100 W, etc. as needed. And support for additional power and voltage options. USB PD3.0 is the latest protocol released by the USB-IF organization, which is designed to program the programmable power supply (PPS, Programmable Power Supply). The USB PD3.0 output voltage range extends from 5V to 3V to 21V with a step-and-shoot voltage of 20 mV.

QC3.0 is Qualcomm's third-generation fast charging technology that supports the bus voltage (VBUS) range, Class A is 3.6 V to 12 V, and Class B is 3.6 V to 20 V. QC 3.0 is equivalent to QC 2.0 in discrete mode, with VBUS selected by static D+/D- values ​​with 0 V, 0.6 v, 3.3 V three-level logic; in continuous mode, the new QC 3.0 is increased by 200 mV small steps or Reducing VBUS allows portable devices to choose the most suitable voltage for optimum charging efficiency and flexibility. The maximum load current is limited to 3 A and the maximum power is 60 W. Qualcomm's fast charge technology has now evolved to the fourth generation, QC4, with the voltage file subdivided into a 20mV file and supports USB PD.