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USB Type-C PD快充简介
2022-07-28 17:01:00 【迎客松88】
一、Power Delivery—发展和进化
Power Delivery的发展史:
2012年7月,Power Delivery 1.0,通过在VBUS上使用BFSK调制来协商供电;
2014年8月,Power Delivery 2.0 ,支持Type-C接口,通过CC线配置电源,支持额定的5V、9V、12V、20V电压,最大5A电流100W。
2015年12月,Power Delivery 3.0,去掉Power Profiles,更改为PD Power Rules,没有额定电压限制。
二、Power Delivery—构架
三、Power Delivery—角色定义
Power Roles:
Source(Host属于Source的一种)
Sink(Device属于Sink的一种)
Dual-Role Power(既可以作为Source又可以作为Sink)
Data Roles:
DFP( Downstream Facing Port, Host属于DFP的一种)
UFP( Upstream Facing Port, Device属于UFP的一种)
Dual-Role Data ( OTG)
通过CC线可以实现电源和数据角色的动态切换。CC线功能详解具体参阅本人博客《USB Type-C 之CC线简介》
四、Power Delivery—Soure和Sink连接
五、Power Delivery—Source和DRP连接
六、Power Delivery—DRP角色的切换过程
七、Power Delivery—DRP和DRP连接
八、USB-C Source适配传统的USB Device
九、USB-C Sink适配传统的USB Host
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