1 General
The Wireless Power Consortium (WPC) is a worldwide organization that aims to develop and promote global standards for wireless power transfer in various application areas. A first application area comprises flat-surface devices such as mobile phones and chargers in the Baseline Power Profile (up to 5 W) and Extended Power Profile (above 5 W).
1.1 Structure of the Qi Specification
General documents
Introduction
Glossary, Acronyms, and Symbols
System description documents
Mechanical, Thermal, and User Interface
Power Delivery
Communications Physical Layer
Communications Protocol
Foreign Object Detection
NFC Tag Protection
Authentication Protocol
1.2 Scope
The Communications Physical Layer (this document) defines the low-level (physical layer and the data link layer) formats of data bits, data bytes, and data packets. In addition, it provides requirements and guidelines for load modulation and frequency-shift keying.
1.3 Compliance
All provisions in the Qi Specification are mandatory, unless specifically indicated as recommended, optional, note, example, or informative. Verbal expression of provisions in this Specification follow the rules provided in ISO/IEC Directives, Part 2.
1.4 References
For undated references, the most recently published document applies. The most recent WPC publications can be downloaded from http://www.wirelesspowerconsortium.com.
1.5 Conventions
1.6 Power Profiles
A Power Profile determines the level of compatibility between a Power Transmitter and a Power Receiver. Table 3 defines the available Power Profiles.
BPP PTx: A Baseline Power Profile Power Transmitter.
EPP5 PTx: An Extended Power Profile Power Transmitter having a restricted power transfer capability, i.e.
EPP PTx: An Extended Power Profile Power Transmitter.
BPP PRx: A Baseline Power Profile Power Receiver.
EPP PRx: An Extended Power Profile Power Receiver.