oSIST prEN IEC 63652-1:2026

• Abstract:

  This document specifies a method and procedures for Wireless Power Transfer between two NFC wireless devices. The provided technical foundations use NFC technology for the initiation, control and execution of 13.56 MHz power transfer.

• Status: Not Published
• Public Enquiry End Date: 29-Sep-2026
• ICS: 33.160.60 - Multimedia systems and teleconferencing equipment
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 04-Aug-2026
• Due Date: 22-Dec-2026
• Directive: Harmonized Standard2014/53/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/536 - [C(2015)536] Standardisation request as regards radio equipment in support of Directive 2014/53/EU
• 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: prEN IEC 63652-1:2026 - NFC Forum Specifications - Part 1: NFC Wireless Charging

Overview

oSIST prEN IEC 63652-1:2026 - NFC Forum Specifications - Part 1: NFC Wireless Charging is a draft European Standard developed by CLC and IEC technical committee 100. This standard specifies the methods and procedures for wireless power transfer (WPT) between two devices using NFC (Near Field Communication) technology. At its core, the specification addresses how NFC-enabled devices communicate to initiate, control, and execute power transfer on the 13.56 MHz frequency band. It sets the technical foundation for reliable, interoperable wireless charging and data exchange within audio, video, and multimedia systems.

Key Topics

• Wireless Power Transfer (WPT) Fundamentals
  Establishes how two NFC devices negotiate, initiate, and maintain power transfer, with detailed processes for sequencing and control.
• NFC Wireless Charging Protocols
  Defines protocol messages, device capabilities, and user experience flow, ensuring interoperability between devices by following standardized procedures.
• System Overview and Reference Equipment
  Outlines the sequence of operations, reference circuit boards (poller and listener), calibration, and essential parameters for system conformance.
• Radio Frequency (RF) Interface
  Covers requirements for analog interfaces compatible with 13.56 MHz NFC standards to support robust power transfer and communication.
• Foreign Object Detection (FOD)
  Specifies mechanisms for detecting unintentional objects in the charging field, adding a layer of safety and efficiency to wireless charging.
• Procedure Flowcharts and Protocol Messaging
  Provides visual flowcharts for process clarity and details on protocol control messages, capability records, and negotiation sequences.

Applications

NFC Wireless Charging, as described in oSIST prEN IEC 63652-1:2026, has numerous practical applications across consumer electronics, multimedia systems, and teleconference equipment. Key use cases include:

• Smartphones and Accessories
  Enables interoperable, cable-free charging between smartphones, wearables, or other NFC-enabled devices.
• Multimedia and Audio Devices
  Facilitates seamless charging in multimedia systems, such as wireless speakers, headphones, and conference room technology.
• Automotive and Public Spaces
  Supports integration into car dashboards and public locations, allowing users to charge compatible devices using a universal standard.
• Secure Short-Range Use
  Since NFC wireless charging operates at close range, it is well suited for secure environments where device proximity is essential.
• Unified Ecosystem Development
  Enables device manufacturers to develop compatible hardware, ensuring a consistent and predictable user charging experience.

Organizations adopting this standard benefit from increased device compatibility, reduced development complexity, and enhanced consumer satisfaction through reliable wireless charging.

Related Standards

Developers, manufacturers, and standards bodies referencing oSIST prEN IEC 63652-1:2026 should also consider key related standards:

• IEC 60950, IEC 62368 – General safety requirements for ICT equipment, relevant for wireless charging device safety and reliability.
• NFC Forum Wireless Charging Technical Specification – The basis for current NFC wireless charging methods and protocol specifics.
• ISO/IEC 14443, ISO/IEC 15693 – Cover the foundational NFC communication protocols and frequency specifications.
• EN 55032 (CISPR 32) – Electromagnetic compatibility standards critical for multimedia system applications.
• Other Parts of IEC 63652 Series – For extended NFC application fields or device classes.

This standard is essential for anyone involved in designing, manufacturing, or testing NFC wireless charging solutions for the European and wider international markets. Adopting oSIST prEN IEC 63652-1:2026 ensures devices meet current expectations for interoperability, user safety, and technical performance in modern wireless charging ecosystems.

SLOVENSKI STANDARD
01-september-2026
Specifikacije NFC Foruma - 1. del: Brezžično polnjenje NFC
NFC Forum Specifications - Part 1: NFC Wireless Charging
NFC Forum Festlegungen – Teil 1: NFC Drahtloses Laden
Ta slovenski standard je istoveten z: prEN IEC 63652-1:2026
ICS:
33.160.60 Večpredstavni (multimedijski) Multimedia systems and
sistemi in oprema za teleconferencing equipment
telekonference
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
prEN IEC 63652-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2026
ICS 33.160.60 -
English Version
NFC Forum Specifications - Part 1: NFC Wireless Charging
(IEC 63652-1:2026)
To be completed NFC Forum Festlegungen - Teil 1: NFC Drahtloses Laden
(IEC 63652-1:2026) (IEC 63652-1:2026)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2026-10-23.

The text of this draft consists of the text of IEC 63652-1:2026.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 83779 Ref. No. prEN IEC 63652-1:2026 E

European foreword
This document (prEN IEC 63652-1:2026) consists of the text of document IEC 63652-1:2026, prepared
by IEC/TC 100 "Audio, video and multimedia systems and equipment".
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this document (doa) dav + 6 months
has to be announced at national level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) dav + 36 months
conflicting with this document have to be withdrawn (to be confirmed or
modified when voting)
This document has been prepared under a standardisation request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.

IEC 63652-1 ®
Edition 1.0 2026-02
INTERNATIONAL
STANDARD
NFC Forum Specifications -
Part 1: NFC Wireless Charging
ICS 33.160.60  ISBN 978-2-8327-0981-8

IEC 63652-1:2026-02(en)
IEC 63652-1:2026 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NFC Forum Specifications -
Part 1: NFC Wireless Charging
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national
electrotechnical committees (IEC National Committees). The object of IEC is to promote international co -operation on all
questions concerning standardization in the electrical and electronic fields. To this end and i n addition to other activities, IEC
publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS)
and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any
IEC National Committee interested in the subject dealt with may participate in this preparatory work. International,
governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC
National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any
end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC
Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried
out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its
technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature
whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use
of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s). IEC
takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect thereof. As of the
date of publication of this document, IEC had not received notice of (a) patent(s), which may be required to implement this
document. However, implementers are cautioned that this may not represent the latest information, which may be obtained
from the patent database available at https://patents.iec.ch. IEC shall not be held responsible for identifying any or all such
patent rights.
IEC 63652-1 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 Wireless Charging Technical Specification Version 2.0 and was submitted as a Fast-
Track document.
The text of this International Standard is based on the following documents:
Draft Report on voting
100/4399/FDIS 100/4434/RVD
IEC 63652-1:2026 © IEC 2026
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
document types developed by IEC are described in greater detail at www.iec.ch/publications.
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
• reconfirmed,
• withdrawn, or
• revised.
NOTE In accordance with ISO/IEC Directives, Part 1, IEC PASs are automatically withdrawn after 4 years.

IEC 63652-1:2026 © IEC 2026
Wireless Charging
Technical Specification
Version 2.0
2021-08-19
[WLC]
TM
NFC Forum
IEC 63652-1:2026 © IEC 2026
Contents
Contents
1 Introduction. 9
1.1 Objectives . 9
1.2 Applicable Documents or References . 9
1.3 Administration . 10
1.4 Trademark and Logo Usage . 10
1.5 Intellectual Property . 10
1.6 Special Word Usage . 10
1.7 Requirement Numbering . 10
1.8 Notational Conventions . 11
Notations . 11
Values of Parameters . 12
1.9 Abbreviations . 13
1.10 Glossary. 14
2 Wireless Charging User Experience . 18
2.1 User Experience Model Overview . 18
3 WLC System Overview . 19
3.1 Sequence Overview . 21
3.2 Functions Properly . 21
3.3 Wireless Charging Operating Volume . 22
3.4 Generic Wireless Charging Support Specifications . 22
4 Radio Frequency (RF) Interface . 24
4.1 Analog Interface . 24
4.2 WLC-L Specification Context . 26
4.3 WLC-P Specification Context Load Modulation Listener to Poller using class 7 WLC-
L . 26
5 Static WPT Power Definition . 28
6 Negotiated WPT Power Definition . 29
6.1 Power of a WLC-P . 29
Specification Purpose . 29
Specification Context . 29
6.2 WLC-L Sustainability . 30
Specification Purpose . 31
Specification Context . 31
7 Reference Equipment . 34
7.1 The Purpose of the NFC Forum Reference Equipment. 34
7.2 Reference Wireless Charging Poller . 35
Specification Purpose . 35
Specification Context . 35
7.3 Reference Wireless Charging Listener . 37
Specification Purpose . 37
Specification Context . 37
8 Foreign Object Detection . 39
8.1 Introduction . 39
8.2 Types of Foreign Objects . 39
8.3 Foreign Object Detection Mechanisms . 39
Wireless Charging Page
IEC 63652-1:2026 © IEC 2026
Contents
8.4 Foreign Object Detection Requirements . 40
8.5 WLC-P Impedance Change Detection . 40
Specification Purpose . 42
Specification Context . 42
Impedance Change Definition . 43
9 WLC-L WPT Stop Request and WLC-P WPT Stop Detection . 44
9.1 WPT Stop Request . 44
10 NFC Link Establishment . 47
10.1 WLC-P . 47
10.2 WLC-L . 48
11 WLC Control Protocol Messages . 49
11.1 Protocol Overview . 49
Control Protocol Messages . 49
WLC-L System Level Integration Overview . 50
Power Adjustment Generic Timing Requirements . 52
11.2 WLC Capability Message (WLC_CAP) . 54
Message Overview . 54
WLC Capability Record . 55
JiFOD Method Record . 71
11.3 WLC Poll Information (WLCP_INFO) . 74
Message Overview . 74
WLC Poll Information Record . 74
11.4 WLC Listen Control (WLCL_CTL) . 80
Message Overview . 80
WLC Listen Control Record . 81
11.5 WLC Protocol Error . 90
12 WLC Procedure Flowcharts . 91
12.1 WLC Procedure Flowchart for the WLC-P . 91
12.2 WLC Procedure Flowchart for the WLC-L . 100
A. Exhibit A . 106
B. Parameter Values . 107
B.1 WLC OV Parameters . 107
B.2 Specification Parameters . 107
B.3 Calibration Procedure for the Reference WLC-P . 110
B.4 Calibration Procedure for the Reference WLC-L . 112
B.5 Orientation and Alignment of NFC Forum Reference Equipment . 114
C. Design Information for NFC Forum Reference Equipment . 115
C.1 Reference WLC-P . 115
C.1.1 PCB Design of the Reference WLC-Ps. 115
C.1.2 Reference WLC-P - Bill Of Materials . 117
C.1.3 Mechanical Dimensions . 119
C.1.4 Reference WLC-P Printed Circuit Board (PCB) Construction . 121
C.2 Reference WLC-L . 121
C.2.1 PCB Design of the Reference WLC-L6 and Reference WLC-L7 . 121
C.2.2 Reference WLC-L - Bill Of Materials . 123
C.2.3 Mechanical Dimensions . 125
C.2.4 Reference WLC-L Printed Circuit Board (PCB) Construction . 127
Wireless Charging Page i
IEC 63652-1:2026 © IEC 2026
Contents
C.2.5 Relay Settings of the Reference WLC-Ls . 127
C.2.6 Power Class Settings of the Reference WLC-Ls . 128
D. FOD Design Guideline (Informative) . 129
D.1 FOD Scenarios . 129
D.2 JiFOD-A Implementation Guideline (Informative) . 130
D.2.1 Record definition for JiFOD-A Method . 131
D.2.2 WLC-L JiFOD-A Method Record in the WLC_CAP Message . 131
D.2.3 WLC-P JiFOD-A Method Record in the WLCP_INFO Message . 131
D.2.4 WLC-L JiFOD-A Method Record in the WLCL_CTL Message . 133
D.2.5 WLC-P Definitions . 134
D.2.6 JiFOD-A Operations . 134
E. Revision History . 138

Wireless Charging Page ii
IEC 63652-1:2026 © IEC 2026
Figures
Figures
Figure 1: NFC Wireless Charging Device User Scenario . 18
Figure 2: NFC Wireless Charging System Flowchart . 20
Figure 3: Example of WLCS Timing Diagram – Negotiated Mode . 21
Figure 4: Wireless Charging Operating Volume (WLC OV) . 22
Figure 5: Reference WLC-P6 PCB . 35
Figure 6: Reference WLC-P7 PCB . 36
Figure 7: Simplified Reference WLC-Ls Circuit . 37
Figure 8: Reference WLC-L6 PCB . 38
Figure 9: Reference WLC-L7 PCB . 38
Figure 10: Impedance Change Example with Increased Impedance . 41
Figure 11: Impedance Change Example with Decreased Impedance . 41
Figure 12: Example of a Short Time Impedance Change with a Duration of t . 42
S,PULSE
Figure 13: Positive and Negative Impedance Change Cases of the WPT Stop Request . 45
Figure 14: WPT Stop Request Section with Detailed Timing Definitions . 46
Figure 15: Protocol Architecture. 49
Figure 16: Message Exchanges for Different WLC-L Implementation Options . 52
Figure 17: Operation Field Adjustment Timing Definition . 53
Figure 18: WLC_CAP Format . 54
Figure 19: WLCP_INFO Format . 74
Figure 20: WLCL_CTL Format . 80
Figure 21: WLC Procedure – WLC-P Flowchart . 92
Figure 22: WLC Procedure – WLC-L Flowchart . 100
Figure 23: Calibration Plane of SMA Plug and Socket . 110
Figure 24: Example of VNA Display while Tuning a Reference WLC-P6. 111
Figure 25: Example of VNA Display while Tuning a Reference WLC-P7. 112
Figure 26: Example of VNA Display while Tuning a Reference WLC-L6 . 113
Figure 27: Example of VNA Display while Tuning a Reference WLC-L7 . 114
Figure 28: Circuit for the Reference WLC-P6 and Reference WLC-P7 . 115
Figure 29: PCB Layout for the Reference WLC-P6 . 115
Figure 30: PCB Layout for the Reference WLC-P7 . 116
Figure 31: Reference WLC-P6 Top Layer . 119
Figure 32: Reference WLC-P6 Bottom Layer . 119
Figure 33: Reference WLC-P7 Top Layer . 120
Wireless Charging Page iii
IEC 63652-1:2026 © IEC 2026
Figures
Figure 34: Reference WLC-P7 Bottom Layer . 120
Figure 35: Circuit for the Reference WLC-L6 and Reference WLC-L7 . 121
Figure 36: PCB Layout for the Reference WLC-L6 . 122
Figure 37: PCB Layout for the Reference WLC-L7 . 122
Figure 38: Reference WLC-L6 Top Layer . 125
Figure 39: Reference WLC-L6 Bottom Layer . 125
Figure 40: Reference WLC-L7 Top Layer . 126
Figure 41: Reference WLC-L7 Bottom Layer . 126
Figure 42: FOD Scenarios . 129
Figure 43: Initial FOD Timing Diagram . 131
Figure 44: JiFOD Timing Definition . 134
Figure 45: FOD Method using Impedance Change Monitoring . 135
Figure 46: FOD Interval Scheme . 135
Figure 47: Initial FOD Sequence – No FO Detection . 136
Figure 48: Initial FOD Sequence – FO Detection . 137

Wireless Charging Page iv
IEC 63652-1:2026 © IEC 2026
Tables
Tables
Table 1: Sample Requirement . 10
Table 2: Notational Conventions . 11
Table 3: Abbreviations . 13
Table 4: Wireless Charging Control Messages . 49
Table 5: WLC Capability Record Payload . 55
Table 6: WLC_PROTOCOL_VER Format . 55
Table 7: WLC_CONFIG Format . 57
Table 8: CAP_WT_INT Format . 58
Table 9: NDEF_RD_WT Values . 60
Table 10: NDEF_WR_TO_INT Values . 62
Table 11: NDEF_WR_WT_INT Values . 63
Table 12 WLC Status and Info Record Payload . 65
Table 13: CONTROL_BYTE_1 Format . 66
Table 14: RECEIVE_POWER Field Values . 67
Table 15: RECEIVE_VOLTAGE Field Values . 68
Table 16: RECEIVE_CURRENT Field Values . 68
Table 17: TEMPERATURE_BATTERY Field Values . 69
Table 18: CONTROL_BYTE_2 Format . 70
Table 19: BATTERY_VOLTAGE Field Values . 70
Table 20: BATTERY_CURRENT Field Values . 71
Table 21: JiFOD Method Record Payload. 72
Table 22: WLC Poll Information Record Payload . 75
Table 23: P_TX Values . 75
Table 24: WLC_P Capability Definition . 76
Table 25: WLC-P_POWER_CLASS Definition . 77
Table 26: TOT_POWER_STEPS . 77
Table 27: CUR_POWER_STEP . 78
Table 28: Minimum Step for Power Increase - NEXT_MIN_STEP_INC . 78
Table 29: Minimum Step for Power Decrease - NEXT_MIN_STEP_DEC . 79
Table 30: WLC Listen Control Record Payload . 81
Table 31: STATUS_INFO. 82
Table 32: WPT_CONFIG . 83
Table 33: POWER_ADJ_REQ Values . 85
Wireless Charging Page v
IEC 63652-1:2026 © IEC 2026
Tables
Table 34: BATTERY_LEVEL Values . 86
Table 35: DVR_INFO . 87
Table 36: HOLD_OFF_WT_INT Values . 88
Table 37: ERROR_INFO . 89
Table 38: Parameters for WLC OV. 107
Table 39: Parameters for WLC . 107
Table 40: Parameters for Reference Equipment Set Up . 109
Table 41: Calibration values for Reference WLC-P6 and Reference WLC-P7 . 110
Table 42: Calibration Values for Reference WLC-L6 and Reference WLC-L7 . 113
Table 43: Reference WLC-P6 - Bill Of Materials . 117
Table 44: Reference WLC-P7 - Bill Of Materials . 118
Table 45: Antenna Relay Settings of the Reference WLC-L. 127
Table 46: Short Plug Settings of the Reference WLC-L6 and Reference WLC-L7 . 128
Table 47: FOD Scenarios . 129
Table 48: Format of the JiFOD Method Record . 132
Table 49: JiFOD_REQ Format . 132
Table 50: JiFOD_DURATION_P Values . 132
Table 51: Format of the JiFOD Method Record . 133
Table 52: JiFOD_DURATION Values . 133
Table 53: Revision History . 138

Wireless Charging Page vi
IEC 63652-1:2026 © IEC 2026
Requirements
Requirements
Requirements 1: Reference Equipment Support . 23
Requirements 2: Analog Interface . 24
Requirements 3: Power level of Static Wireless Power Transfer . 28
Requirements 4: WLC-P Power of Negotiated WPT . 30
Requirements 5: WLC-L Sustainability . 32
Requirements 6: Reference WLC-P . 36
Requirements 7: Reference WLC-L . 38
Requirements 8: Generic FOD. 39
Requirements 9: Generic Background FOD . 40
Requirements 10: NFC Polling FOD . 40
Requirements 11: WLC-P Impedance Change Detection . 43
Requirements 12: WPT Stop . 44
Requirements 13: NFC LE – WLC-P. 47
Requirements 14: NFC LE – WLC-L . 48
Requirements 15: WLC Control Protocol – Generic messages . 50
Requirements 16: Power Adjustment – Generic timing . 53
Requirements 17: WLC_CAP . 54
Requirements 18: WLC Capability Record . 55
Requirements 19: WLC_PROTOCOL_VER . 56
Requirements 20: WLC_CONFIG . 57
Requirements 21: CAP_WT_INT . 59
Requirements 22: NDEF_RD_WT . 60
Requirements 23: NDEF_WR_TO_INT . 62
Requirements 24: NDEF_WR_WT_INT . 63
Requirements 25: WLC Status and Info Record . 65
Requirements 26: Control Byte 1 . 66
Requirements 27: RECEIVE_POWER . 67
Requirements 28: RECEIVE_VOLTAGE . 68
Requirements 29: RECEIVE_CURRENT . 68
Requirements 30: TEMPERATURE_BATTERY . 69
Requirements 31: TEMPERATURE_WLCL . 69
Requirements 32: Control Byte 2 . 70
Requirements 33: BATTERY_VOLTAGE . 70
Wireless Charging Page vii
IEC 63652-1:2026 © IEC 2026
Requirements
Requirements 34: BATTERY_CURRENT . 71
Requirements 35: JiFOD Method Record . 72
Requirements 36: COMPANY_ID . 72
Requirements 37: METHOD_ID . 73
Requirements 38: WLCP_INFO . 74
Requirements 39: WLC Poll Information Record. 75
Requirements 40: P_TX . 76
Requirements 41: WLC_P_CAP . 76
Requirements 42: WLC-P_POWER_CLASS . 77
Requirements 43: TOT_POWER_STEPS . 77
Requirements 44: CUR_POWER_STEP . 78
Requirements 45: Minimum Step for Power Increase - NEXT_MIN_STEP_INC . 79
Requirements 46: Minimum Step for Power Decrease - NEXT_MIN_STEP_DEC . 79
Requirements 47: WLCL_CTL . 80
Requirements 48: WLC Listen Control Record . 81
Requirements 49: STATUS_INFO . 82
Requirements 50: WPT_CONFIG . 84
Requirements 51: POWER_ADJ_REQ . 85
Requirements 52: BATTERY_LEVEL . 86
Requirements 53: DVR_INFO . 87
Requirements 54: HOLD_OFF_WT_INT . 88
Requirements 55: ERROR_INFO . 89
Requirements 56: BATTERY_LEVEL field handling . 89
Requirements 57: WLC Protocol Error . 90
Requirements 58: WLC Procedure – WLC-P . 93
Requirements 59: WLC Procedure – WLC-L . 101
Wireless Charging Page viii
IEC 63652-1:2026 © IEC 2026
Introduction
1 Introduction
NFC technology allows power to be transferred to a Tag in order to enable communication. This
is achieved by providing a constant carrier signal.
This specification expands this scope by using the NFC communication link to control the power
transferred. Thus the pure communication purpose of NFC is extended to wireless charging.
The transferred power can charge small NFC enabled devices such as smartwatches, activity
trackers, headsets and many other consumer electronics products.
The benefits of NFC technology for wireless charging include:
• Use of the existing NFC specification for controlling the received power to provide
charging
• Sharing the same antenna for both communication and power transfer.
1.1 Objectives
This document specifies a method and procedures for Wireless Power Transfer between two NFC
wireless devices. The provided technical foundations use NFC technology for the initiation,
control and execution of 13.56 MHz power transfer.
1.2 Applicable Documents or References
The following documents contain provisions that are referenced in this specification. The latest
version (including all published amendments) applies unless a publication date is explicitly
stated.
[ACTIVITY] Activity Technical Specification,
NFC Forum
[ANALOG] Analog Technical Specification,
NFC Forum
[DIGITAL] Digital Protocol Technical Specification
NFC Forum
[MANU] Register of IC manufacturers, ISO/IEC JTC1/SC17,
Standing Document 5
[NDEF] NFC Data Exchange Format (NDEF) Technical Specification,
NFC Forum
[RFC2119] Key words for use in RFCs to Indicate Requirement Levels, RFC 2119,
S. Bradner,
March 1997,
Internet Engineering Task Force
[RTD] NFC Record Type Definition Specification
NFC Forum
[RTD-DI] Device Information RTD Technical Specification,
NFC Forum
[T2T] Type 2 Tag Technical Specification,
NFC Forum
Wireless Charging Page 9
IEC 63652-1:2026 © IEC 2026
Introduction
[T3T] Type 3 Tag Technical Specification,
NFC Forum
[T4T] Type 4 Tag Technical Specification,
NFC Forum
[T5T] Type 5 Tag Technical Specification,
NFC Forum
[WLC_TC] Test Specification/Cases for Wireless Charging Technical Specification,
NFC Forum
1.3 Administration
The NFC Forum Wireless Charging Specification is an open specification supported by the Near
Field Communication Forum, Inc., located at:
401 Edgewater Place, Suite 600
Wakefield, MA, 01880
Tel.: [phone]
Fax: [phone]
http://www.nfc-forum.org/
The NFC Forum, Inc. maintains
...