数据和电源通用串行总线接口.通用组件.第1-2部分:USB电源传输规范

[中文适用范围]： 本规范旨在作为现有 [USB 2.0]@ [USB 3.1]@ [USB Type-C 1.2] 和 [USBBC 1.2] 规范的扩展。它仅涉及实现 USB 供电所需的元素。它针对的是电源供应商@ [USB 2.0]@ [USB 3.1]@ [USB Type-C 1.2] 和 [USBBC 1.2] 平台@ 设备和电缆组件制造商@ 提供规范性信息以允许为此设计的组件实现互操作性规格。信息性信息@如果提供的话@可以说明可能的设计实现 [外文原描述]： IEC 62680-1-2:2017(E) defines a power delivery system covering all elements of a USB system including: Hosts, Devices, Hubs, Chargers and cable assemblies. This specification describes the architecture, protocols, power supply behavior, connectors and cabling necessary for managing power delivery over USB at up to 100 W. This specification is intended to be fully compatible and extend the existing USB infrastructure. It is intended that this specification will allow system OEMs, power supply and peripheral developers adequate flexibility for product versatility and market differentiation without losing backwards compatibility. USB Power Delivery is designed to operate independently of the existing USB bus defined mechanisms used to negotiate power which are: - [USB 2.0], [USB 3.1]in band requests for high power interfaces. - [USBBC 1.2]mechanisms for supplying higher power (not mandated by this specification). - [USB Type-C 1.2]mechanisms for supplying higher power