prEN IEC 63758-7:2026

• Status: Not Published
• Publication Date: 23-Feb-2028
• Technical Committee: CLC/TC 100X - Audio, video and multimedia systems and equipment and related sub-systems
• Current Stage: 4020 - Enquiry circulated - Enquiry
• Start Date: 18-Sep-2026
• Completion Date: 18-Sep-2026
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Mandate: M/607 - COMMISSION IMPLEMENTING DECISION of C(2025)1207 on a Standardisation Request M/607 as regards charging interface and charging communication protocol for radio equipment capable of being recharged by means of wireless charging in relation with Article 3(4), sixth subparagraph, of Directive 2014/53/EU of the European Parliament and of the Council.
• Ref Project: oSIST prEN IEC 63758-7:2026 - Qi Specification - Version 2.3 - Part 7: Magnetic covers (Fast Track)

prEN IEC 63758-7:2026 is a draft IEC/CENELEC document in the Qi Specification, Version 2.3, Part 7. It specifies the requirements for magnetic cover profiles used with magnetic cover products in Qi wireless power transfer systems, including how MC-PRx combinations behave with PTx products. The document is aimed at product designers, test labs, and compliance teams working on PRx products and magnetic accessories.

What does prEN IEC 63758-7:2026 specify?

prEN IEC 63758-7:2026 specifies the requirements for magnetic cover profiles for magnetic cover products. In practice, it defines how a magnetic cover changes the compliance properties of a PRx product and how the resulting MC-PRx product combination shall behave with an MPP PTx product.

The document is organized into four main clauses:

Clause	What it covers
1	General: structure of the Qi Specification, scope, compliance, references, and conventions
2	Introduction and terminology
3	System model for magnetic covers, coordinate system, and MC-PRx product combination behavior
4	Requirements for magnetic behavior, LQK, power delivery, communications physical layer, foreign object detection, and communications protocol

Clause 1 also sets the rules for mandatory and non-mandatory wording, number notation, data packet field layout, text strings, and shorthand packet references. That matters because implementers need to read the packet and requirement language exactly as intended.

What are the key requirements of prEN IEC 63758-7:2026?

prEN IEC 63758-7:2026 combines a physical system model with a set of linked requirements from other Qi books. The most important points are the magnetic cover geometry, cover detection, operating mode, and the requirement to follow the referenced MPP books for delivery, communication, and foreign object detection.

Mechanical and magnetic layout

Clause 3.1 states that the magnetic cover thickness is 2 mm from the interface surface of the MC to the interface surface of the PRx product. It also states that the magnet array in the MC is centred on the PRx coil.

That matters because the cover is not just a cosmetic accessory - its geometry is part of the compatibility model. Clause 3.1 also distinguishes two magnetic cover types: MCPE-compliant covers follow the PRx system model, while MCPM-compliant covers follow the PTx system model. Optional orientation magnets may be included.

Alignment and product-combination behavior

Clause 3.2 defines a coordinate system based on a reference point at the PTx surface and a reference point at the outer surface of the magnetic cover. Coordinates are expressed as tuples (r,z), with r derived from x and y position using Euclidean distance.

In practice, this gives the alignment language used for magnetic cover combinations and testing. Clause 3.3 then defines behavior for two cases: an MCPM-compliant MC-PRx product combination uses the magnetic protocol and operates as an MPP PRx product, while an MCPE-compliant combination uses the magnetic protocol only when the magnetic cover is fitted, and otherwise operates as a BPP-compliant or EPP-compliant PRx product depending on capability.

Cover presence check

Clause 4.1.1 requires a BPP- or EPP-compliant PRx product that is part of an MCPE-compliant combination to verify that a magnetic cover is present before using the magnetic protocol with an MPP-compliant PTx product.

This is a practical interoperability rule. A product must detect the cover before switching protocols, so the system does not assume magnetic-operation behavior when the cover is absent.

Linked MPP requirements

Clause 4.2 requires compliance with the MPP Magnetics Design book, including RMBX200 and RMBX300. Clause 4.3 requires compliance with the relevant MPP Power Delivery requirements for operating frequency, object detection, digital ping, coupling factor estimation, and power control.

Clause 4.4 requires compliance with the MPP Communications Physical Layer book for FSK and ASK behavior. Clause 4.5 requires compliance with the MPP Foreign Object Detection book for power loss accounting, accessory loss, mated Q-deflection, and DPLOSS. Clause 4.6 requires compliance with all PRx requirements in the MPP Communications Protocol book.

For users, this means the magnetic cover document does not stand alone. It defines the cover-specific layer and then points to the matching PRx requirements that must still be met.

Compliance language and data conventions

Clause 1.3 makes the provisions mandatory unless they are clearly marked as recommended, optional, note, example, or informative. Clause 1.5 then defines how numbers, tolerances, data packets, text strings, and shorthand packet names are interpreted.

That matters for implementation, testing, and documentation. For example, numeric values are exact unless stated otherwise, packet fields use big-endian storage, and text strings use printable ASCII with NUL padding where needed.

What terms does prEN IEC 63758-7:2026 define?

prEN IEC 63758-7:2026 defines several terms specific to magnetic covers and their behavior in the Qi system.

• MagneticCover (MC) - A PRx product accessory containing a magnet array that changes the PRx product's compliance properties.
• MagneticCoverProfile (MCP) - The power profile that determines the compliance properties exposed at the interface surface of a PRx product fitted with a magnetic cover.
• MCPM - A magnetic cover profile intended for use with MPP PRx products.
• MCPE - A magnetic cover profile intended for use with BPP or EPP products.
• MagneticAttachmentField - A permanent magnetic field that creates mating force between a PRx or MC and a PTx.
• FeedthroughMagnets - Magnets in an MC that carry the magnetic attachment field through the PRx.
• TerminationMagnets - Magnets in an MC that block propagation of the magnetic attachment field to the PRx.

These terms matter because they distinguish the cover’s role from the base PRx product and show how the magnetic field is shaped.

Who uses prEN IEC 63758-7:2026?

prEN IEC 63758-7:2026 is used by teams designing wireless power receiver products, magnetic accessories, and Qi-compatible charging systems. It is also relevant to test laboratories, certification bodies, and quality or compliance managers who need to verify that an MC-PRx product combination follows the required magnetic, power, and protocol behavior.

The document is especially relevant for flat-surface devices such as mobile phones and chargers, which the Qi Specification introduction identifies as an important application area. It is also useful for suppliers working on BPP, EPP, and MPP product variants where magnetic attachment and cover presence affect operation.

Which standards are used with prEN IEC 63758-7:2026?

prEN IEC 63758-7:2026 relies on several named companion books and one general wording standard:

• ISO/IEC Directives, Part 2 - defines the drafting rules for requirement wording used in the document.
• Glossary - provides general Qi terminology not repeated in this part.
• MPP Magnetics Design - supplies magnetic system models and the RMBX200 and RMBX300 requirements.
• MPP Power Delivery - supplies the PRx operating frequency, object detection, digital ping, coupling factor estimation, and power control requirements.
• MPP Communications Physical Layer - supplies the PRx FSK and ASK requirements.
• MPP Foreign Object Detection - supplies the power loss accounting, accessory loss, mated Q-deflection, and DPLOSS requirements.
• MPP Communications Protocol - supplies the PRx communications protocol requirements.
• Qi Specification, Communications Protocol - defines the packet mnemonics used by the shorthand notation.

Together, these books provide the protocol and electrical context that the magnetic cover part builds on.

What does the prEN IEC 63758-7:2026 document contain?

prEN IEC 63758-7:2026 contains a mixture of explanatory material, models, and requirement references. It includes Table 1 on verbal forms, Table 2 and Figure 1 on data packet field layout, and Figure 4 on the coordinate system.

The document also includes Figures 2 and 3 showing magnetic cover combinations for MCPE and MCPM cases, plus text examples for field storage. Its main technical value is in the system model for MC construction and alignment, and in the requirement links that tell implementers which MPP rules must still be met for power delivery, communications, and foreign object detection.

SLOVENSKI STANDARD
01-november-2026
Specifikacija Qi - Različica 2.3 - 7. del: Magnetni pokrovi (hitri postopek)
Qi Specification - Version 2.3 - Part 7: Magnetic covers (Fast Track)
Ta slovenski standard je istoveten z: prEN IEC 63758-7:2026
ICS:
29.240.99 Druga oprema v zvezi z Other equipment related to
omrežji za prenos in power transmission and
distribucijo električne energije distribution networks
33.160.99 Druga avdio, video in Other audio, video and
avdiovizuelna oprema audiovisual equipment
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

100/4550/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63758-7 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-09-18 2026-12-11
SUPERSEDES DOCUMENTS:
IEC TC 100 : AUDIO, VIDEO AND MULTIMEDIA SYSTEMS AND EQUIPMENT
SECRETARIAT: SECRETARY:
Japan Ms Mahiru Uehara
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 106,TC 108
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Qi Specification - Version 2.3 - Part 7: Magnetic covers (Fast Track)

PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
As this is a fast-track process offered by WPC, the Word file is not provided.

electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

QiSpecification
MagneticCovers
Version2.3
PublishDate:08December2025
DISCLAIMER
Theinformationcontainedhereinisbelievedtobeaccurateasofthedateofpublication,butisprovided“asis”andmay
containerrors.TheWirelessPowerConsortiummakesnowarranty,expressorimplied,withrespecttothisdocument
anditscontents,includinganywarrantyoftitle,ownership,merchantability,orfitnessforaparticularuseorpurpose.
NeithertheWirelessPowerConsortium,noranymemberoftheWirelessPowerConsortiumwillbeliableforerrorsin
thisdocumentorforanydamages,includingindirectorconsequential,fromuseoforrelianceontheaccuracyofthis
document.Foranyfurtherexplanationofthecontentsofthisdocument,orincaseofanyperceivedinconsistencyor
ambiguityofinterpretation,contact:[e-mail].

Contents
1. General 4
1.1 StructureoftheQi Specification 4
1.2 Scope 5
1.3 Compliance 5
1.4 References 5
1.5 Conventions 6
1.5.1 Notationofnumbers 6
1.5.2 Tolerances 6
1.5.3 Fieldsinadatapacket 6
1.5.4 Notationoftextstrings 7
1.5.5 Short-handnotationfordatapackets 7
2. Introduction 8
2.1 Terminology 9
3. SystemModel 10
3.1 MagneticCoverConstruction 10
3.2 CoordinateSystem 12
3.3 MC-PRxProductCombinationProtocolBehaviour 13
3.3.1 MCPM-compliantMagneticCover 13
3.3.2 MCPE-compliantMagneticCover 13
4. Requirements 14
4.1 MagneticRequirements 14
4.1.1 CMAG001-MagneticCoverPresenceCheck 14
4.2 LQK Requirements 15
4.3 PowerDeliveryRequirements 16
4.3.1 OperatingFrequency 16
4.3.2 ObjectDetection 16
4.3.3 DigitalPing 16
4.3.4 CouplingFactorEstimation 16
4.3.5 PowerControl 16
4.4 CommunicationsPhysicalLayerRequirements 17
4.4.1 FSK 17
4.4.2 ASK 17
4.5 ForeignObjectDetectionRequirements 18
4.5.1 PowerLossAccounting 18
4.5.2 AccessoryLoss 18
4.5.3 MatedQ-DeflectionTest 18
4.5.4 DPLOSS 18
4.6 MPP CommunicationsProtocolRequirements 19

1. General
TheWirelessPowerConsortium(WPC)isaworldwideorganizationthataimstodevelopandpromoteglobalstandards
forwirelesspowertransferinvariousapplicationareas.Animportantapplicationareacomprisesflat-surfacedevices
suchasmobilephonesandchargersoperatingatpowerlevelsupto25W.
1.1 StructureoftheQi Specification
Generaldocuments
l
Introduction
l
Glossary,Acronyms,andSymbols
l
TechnicalSystemOverview
l
PowerProfiles
Systemdescriptiondocuments
l
Mechanical,Thermal,andUserInterface
l
PowerDelivery
l
CommunicationsPhysicalLayer
l
CommunicationsProtocol
l
ForeignObjectDetection
l
NFCTagProtection
l
AuthenticationProtocol
l
MPPCommunicationsProtocol
l
MPPMagneticsDesign
l
MPP PowerDelivery
l
MPP CommunicationsPhysicalLayer
l
MPP ForeignObjectDetection
l
MPP DesignGuidelines(Informative)
l
MagneticCovers
l
ActiveAlignmentSystem
l
ThermalManagementProtocol
1.2 Scope
TheQiSpecification,MagneticCovers(this document)definestherequirementsofthemagneticcoverprofilesfor
magneticcoverproducts.
1.3 Compliance
AllprovisionsintheQiSpecificationaremandatory,unlessspecificallyindicatedasrecommended,optional,note,
example,orinformative.VerbalexpressionofprovisionsinthisSpecificationfollowtherulesprovidedinISO/IEC
Directives,Part2.
Table1-Verbalformsforexpressionsofprovisions
Provision Verbalform
requirement “shall”or“shallnot”
recommendation “should”or“shouldnot”
permission “may”or“maynot”
capability “can”or“cannot”
1.4 References
Forundatedreferences,themostrecentlypublisheddocumentapplies.ThemostrecentWPCpublicationscanbe
downloadedfromhttp://www.wirelesspowerconsortium.com.

1.5 Conventions
1.5.1 Notationofnumbers
l
Realnumbersusethedigits0to9,adecimalpoint,andoptionallyanexponentialpart.
l
Integernumbersindecimalnotationusethedigits0to9.
l
Integernumbersinhexadecimalnotationusethehexadecimaldigits0to9andAtoF,andareprefixedby"0x"
unlessexplicitlyindicatedotherwise.
l
SinglebitvaluesusethewordsZEROandONE.
1.5.2 Tolerances
Unlessindicatedotherwise,allnumericvaluesintheQiSpecificationareexactlyasspecifiedanddonothaveany
impliedtolerance.
1.5.3 Fieldsinadatapacket
Anumericvaluestoredinafieldofadatapacketusesabig-endianformat.Bitsthataremoresignificantarestoredata
lowerbyteoffsetthanbitsthatarelesssignificant.Table2andFigure1provideexamplesoftheinterpretationofsuch
fields.
Table2-Exampleoffieldsinadatapacket(table)
b b b b b b b b
7 6 5 4 3 2 1 0
B (msb)
B 16-bitNumericDataField (lsb)
B OtherField
(msb)
B 16-bitNumericDataField (lsb)
Field
Figure1-Examplesoffieldsinadatapacket

1.5.4 Notationoftextstrings
TextstringsconsistofasequenceofprintableASCIIcharacters(i.e.intherangeof0x20to0x7E)enclosedindouble
quotes(").Textstringsarestoredinfieldsofdatastructureswiththefirstcharacterofthestringatthelowestbyte
o
...