Introduction to USB type-C PD fast charging

One 、Power Delivery— Development and evolution

Power Delivery History of development ：
2012 year 7 month ,Power Delivery 1.0, By means of VBUS Upper use BFSK Modulation to negotiate power supply ;
2014 year 8 month ,Power Delivery 2.0 , Support Type-C Interface , adopt CC Line configuration power supply , Support rated 5V、9V、12V、20V voltage , Maximum 5A electric current 100W.
2015 year 12 month ,Power Delivery 3.0, Get rid of Power Profiles, Change to PD Power Rules, There is no rated voltage limit .

Two 、Power Delivery— The architecture

3、 ... and 、Power Delivery— Role definition
Power Roles：
Source（Host Belong to Source A kind of ）
Sink（Device Belong to Sink A kind of ）
Dual-Role Power（ It can be used as Source Can be used as Sink）

Data Roles:
DFP（ Downstream Facing Port, Host Belong to DFP A kind of ）
UFP（ Upstream Facing Port, Device Belong to UFP A kind of ）
Dual-Role Data （ OTG）

adopt CC Line can realize dynamic switching between power and data roles .CC See my blog for details of line functions 《USB Type-C And CC Line introduction 》

Four 、Power Delivery—Soure and Sink Connect

5、 ... and 、Power Delivery—Source and DRP Connect

6、 ... and 、Power Delivery—DRP Role switching process

7、 ... and 、Power Delivery—DRP and DRP Connect

8、 ... and 、USB-C Source Suitable for traditional USB Device

Nine 、USB-C Sink Suitable for traditional USB Host