IEC 63563-2:2025

Qi Specification version 2.0 - Part 2: Glossary

IEC 63563-2:2025 provides glossary of definitions, acronyms, and symbols for the the Qi Specification, which applies to flat surface devices such as mobile phones and tablets that use up to 15 W of power

Spécification Qi version 2.0 - Partie 2 : Glossaire

IEC 63563-2:2025 est un glossaire des définitions, acronymes et symboles utilisés dans la série 63563.

General Information

• Status: Published
• Publication Date: 09-Feb-2025
• ICS: 29.240.99 - Other equipment related to power transmission and distribution networks
• ICS: 35.240.99 - IT applications in other fields
• Technical Committee: TA 15 - Wireless Power Transfer
• Drafting Committee: WG 1 - TC 100/TA 15/WG 1
• Current Stage: PPUB - Publication issued
• Start Date: 10-Feb-2025
• Completion Date: 07-Mar-2025

Overview

IEC 63563-2:2025 - Qi Specification version 2.0, Part 2: Glossary is the IEC international standard that compiles the authoritative definitions, acronyms and symbols used throughout the Qi v2.0 wireless power specification. Targeted at flat-surface wireless power systems (for example, mobile phones and tablets) operating up to 15 W, this glossary ensures consistent terminology for manufacturers, test labs, implementers and conformity assessors.

Key topics and what the standard covers

• Standardized terminology for wireless power system components and concepts:
  • Power Transmitter / Power Receiver, Primary Coil / Secondary Coil, Primary Cell, Active Area, Interface Surface, Air Gap
  • Power Signal, Transmitted Power, Received Power, Load Power, Supply Power
• Operational concepts and control terms:
  • Operating Point, Operating Volume, Power Transfer Contract, Control Point, Communications and Control Unit (CCU)
• Profiles and protocols:
  • Baseline Power Profile (BPP), Extended Power Profile (EPP), Baseline Protocol, Extended Protocol
• Safety, detection and performance:
  • Foreign Object, Foreign Object Detection (FOD), Friendly Metal, Shielding, Reference Quality Factor
• Security and cryptography-related terms:
  • Authentication, Nonce, Certificate, Certificate Authority (CA), Certificate Chain, Root/Intermediate/Leaf Certificates, Revocation, Revocation List, Product Unit Certificate, Manufacturer CA Certificate
• Identifiers and test concepts:
  • WPID (48-bit Qi device identifier), Test Power Transmitter / Test Power Receiver, Reserved bits/values

Practical applications - who uses this standard

• Device manufacturers (smartphones, tablets, accessories) use the glossary to align product specifications and firmware with Qi v2.0 terminology.
• Firmware and hardware engineers rely on consistent definitions for implementing communication, authentication and power control features.
• Test laboratories and certification bodies reference the glossary during conformance testing and certificate issuance to avoid ambiguous interpretation.
• Standards writers, product managers and documentation teams use it to create compliant user guides, regulatory filings and interoperability documentation.
• Security engineers use the authentication and certificate definitions to design and validate secure device identity and update processes.

Related standards and references

• This glossary is part of the Qi Specification v2.0 suite developed by the Wireless Power Consortium and published as an IEC standard. Implementers should consult other parts of the Qi Specification (protocol, power profiles, test procedures) and IEC publication resources (Electropedia) for complete technical requirements.

Keywords: IEC 63563-2:2025, Qi Specification version 2.0, glossary, wireless charging, wireless power, 15 W, definitions, acronyms, symbols, Power Transmitter, Power Receiver, FOD, authentication, certificate chain, WPID.

Standards Content (Sample)

IEC 63563-2 ®
Edition 1.0 2025-02
INTERNATIONAL
STANDARD
Qi Specification version 2.0 –
Part 2: Glossary
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IEC 63563-2 ®
Edition 1.0 2025-02
INTERNATIONAL
STANDARD
Qi Specification version 2.0 –

Part 2: Glossary
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.99; 35.240.99 ISBN 978-2-8327-0185-0

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
QI SPECIFICATION VERSION 2.0 –
Part 2: Glossary
FOREWORD
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not be held responsible for identifying any or all such patent rights.
IEC 635-2 has been prepared by technical area 15: Wireless Power Transfer, of IEC
technical committee 100: Audio, video and multimedia systems and equipment. It is an
International Standard.
It is based on Qi Specification version 2.0, Glossary and was submitted as a Fast-Track
document.
The text of this International Standard is based on the following documents:
Draft Report on voting
//FDIS //RVD
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Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
The structure and editorial rules used in this publication reflect the practice of the organization
which submitted it.
This document was developed in accordance with ISO/IEC Directives, Part 1 and ISO/IEC
Directives, IEC Supplement available at www.iec.ch/members_experts/refdocs. The main
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The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
x reconfirmed,
x withdrawn, or
x revised.
 ,(&‹,(&
WIRELESS POWER
CONSORTIUM
Qi Specification
Glossary
Definitions, Acronyms, and Symbols
Version 2.0
April 2023
,(&‹,(& 
DISCLAIMER
Theinformationcontainedhereinisbelievedtobeaccurateasofthedateofpublication,
butisprovided“asis”andmaycontainerrors.TheWirelessPowerConsortiummakesno
warranty,expressorimplied,withrespecttothisdocumentanditscontents,includingany
warrantyoftitle,ownership,merchantability,orfitnessforaparticularuseorpurpose.
NeithertheWirelessPowerConsortium,noranymemberoftheWirelessPower
Consortiumwillbeliableforerrorsinthisdocumentorforanydamages,includingindirect
orconsequential,fromuseoforrelianceontheaccuracyofthisdocument.For any further
explanation of the contents of this document, or in case of any perceived inconsistency or ambiguity
of interpretation, contact: [e-mail].
RELEASE HISTORY
Specification Version Release Date Description
2.0 April 2023 Initial release of the v2.0 Qi Specification.

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Table of Contents
1  Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2  Acronyms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3  Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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1 Definitions
ActiveArea: The part of the Interface Surface of a Power Transmitter Product or
Power Receiver Product through which a sufficiently high magnetic flux
penetrates when the Power Transmitter Product is providing power to
the Power Receiver Product.
AirGap: The distance between the top surface of a Power Transmitter Product
and the bottom surface of a Power Receiver Product.
NOTE: The Air Gap also comprises any additional spacing between a Power
Transmitter Product and a Power Receiver Product introduced by accessories
added by a user to either product.
AnalogPing: A short-duration Power Signal applied by a Power Transmitter with the
purpose of detecting the presence of an object, without waking up a
Power Receiver.
Authentication: A tamper-resistant process of a Power Receiver verifying the identity of a
Power Transmitter.
BaselinePowerProfile:A supported Power Profile.
BaselineProtocol: The communications protocol introduced in version 1.0 of the
QiSpecification.
Certificate: A digital form of identification that provides information about a
Certificate Authority, a manufacturer, or a Power Transmitter Product
Unit, and certifies ownership of a public key.
CertificateAuthority: An organization that issues Certificates.
CertificateChain: A series of two or more Certificates where each Certificate is signed by
the owner of the preceding Certificate in the chain.
CommunicationsandControlUnit:
The functional part of a Power Transmitter or Power Receiver that
controls the power transfer.
ControlPoint: The combination of voltage and current provided at the output of the
Power Receiver, and other parameters that are specific to a particular
Power Receiver implementation.
DataStreamInitiator: A Power Transmitter or Power Receiver that can open a data transport
stream.
DataStreamResponder:
A Power Transmitter or Power Receiver that can accept a data transport
stream.
DetectionUnit: The functional part of a Power Transmitter that detects the presence of a
Power Receiver on the Interface Surface.
DigitalPing: A Power Signal applied by a Power Transmitter with the purpose to
wake up a Power Receiver.
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EvaluationAssuranceLevel:
A numerical rating describing the depth and rigor of a security
evaluation.
ExtendedProtocol: The communications protocol introduced in version 1.2 and enhanced in
later versions of the QiSpecification.
ExtendedPowerProfile:A supported Power Profile.
ForeignObject: An object that is neither part of a Power Transmitter Product nor of a
Power Receiver Product and that can generate heat when exposed to a
Power Signal.
ForeignObjectDetection:
A process used by a Power Transmitter and Power Receiver to determine
whether a Foreign Object is present in the Operating Volume and can
generate heat beyond safe limits.
FriendlyMetal: An integral part of a Power Receiver Product or a Power Transmitter
Product that can unintentionally generate heat when exposed to a Power
Signal.
GuaranteedLoadPower:
A Load Power level agreed between the Power Receiver and the Power
Transmitter.
InterfaceSurface: The flat part of the surface of a Power Transmitter Product that is closest
to the Primary Coil(s).
IntermediateCertificate:
A Certificate that is positioned in a Certificate Chain between the Root
Certificate and the Leaf Certificate.
Issuer: A Certificate-providing entity such as the WPC CA or a Manufacturer CA.
LeafCertificate: The last Certificate in a Certificate Chain.
Load: A subsystem that can draw power from a Power Receiver.
LoadPower: The power dissipated in the Load.
ManufacturerCACertificate:
A Certificate that describes a manufacturer. It is signed by the Certificate
Authority and is used as an Intermediate Certificate.
ManufacturerCode: A 16-bit number that identifies the manufacturer of the Power
Transmitter or Power Receiver. This number is also referred to as the
Power Transmitter Manufacturer Code (PTMC) or the Power Receiver
Manufacturer Code (PRMC).
Nonce: A number used only once in any given context of the Authentication
proto
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