ETSI TR 102 874-7 V1.1.1 (2025-06)

TECHNICAL REPORT
Access, Terminals, Transmission and Multiplexing (ATTM);
External Common Power Supply for Customer Premises
Network and Access Equipment;
Part 7: Adaptive and multiple output power supplies based on
USB Type C connector and USB PD support

2 ETSI TR 102 874-7 V1.1.1 (2025-06)

Reference
DTR/ATTMSDMC-105181
Keywords
customer premises networks, power supply
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3 ETSI TR 102 874-7 V1.1.1 (2025-06)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Executive summary . 4
Introduction . 4
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 6
3.1 Terms . 6
3.2 Symbols . 7
3.3 Abbreviations . 7
4 EU Regulation, and defining standards and specifications . 7
4.1 European Directive 2022/2380 . 7
4.2 Type-C characterisation . 7
5 Challenges and precautions . 8
5.1 Challenges and precautions when using Type-C sources and sinks . 8
5.2 Precautions when using the Type-C specifications: . 8
5.3 The behaviour of multisource . 8
Annex A: How to select a Type-C source (charger) . 9
Annex B: Usage of USB-C and USB-A . 10
Annex C: USB-C with USB PD (re-)negotiation mechanism issues . 11
Annex D: USB-C with USB PD power technical requirements . 13
Annex E: Current and power management . 14
Annex F: Bibliography . 15
Annex G: Change history . 16
History . 17

ETSI
4 ETSI TR 102 874-7 V1.1.1 (2025-06)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This Technical Report (TR) has been produced by ETSI Technical Committee Access, Terminals, Transmission and
Multiplexing (ATTM).
Modal verbs terminology
In the present document "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be
interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Executive summary
The present document provides background information about USB Type C connector and USB PD 3.0 support
referenced in Directive (EU) 2022/2380 [i.1], the successive version PD 3.1, and assist users to understand the specific
characteristics of USB-C with PD support, and select suitable sources and chargers, for their equipment.
Introduction
Directive (EU) 2022/2380 [i.1] will apply for the European market from 28 December 2024 for portable devices with a ®
USB-C charging port. The Directive will apply for laptops from 28 April 2026.
With the introduction of the USB-C interface with USB Power Delivery (PD) function, USB-C becomes the standard
for smartphone, tablet charging and connection.
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5 ETSI TR 102 874-7 V1.1.1 (2025-06)
The USB Power Delivery (PD) options are wide ranging, and the requirements to achieve full compatibility and to
ensure safety for chargers and smartphones and tablets can be challenging with the maximum voltage, current and
power.
The potential issue for using USB-A existing and older chargers, sources, with adapters or cables to Type-C sinks, is
that a Type-C sink expects up to 3 A at 5 V (15 W), while USB-A existing and older chargers may provide for example
only 1, or 21 A (5 or 10,5 W) or even less. 240 W will require suitable cables as USB-C to prevent overheating and/or
failure of at least the charger. The complexity and high-power ability require technical advice and precautions to avoid
overload, overheating, damage and burns.
® ®
NOTE: USB-C and USB Type-C are registered trademarks of the USB-IF.

ETSI
6 ETSI TR 102 874-7 V1.1.1 (2025-06)
1 Scope
The present document provides background information on the USB-C interface and associated USB Power Delivery
functions, with a focus on technical aspects.
The present document intends to help users to understand the implications of USB PD on USB-C, to understand their
behaviour, and to help to procure and deploy USB PD supporting systems, and prevent safety issues.
2 References
2.1 Normative references
Normative references are not applicable in the present document.
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
[i.1] Directive (EU) 2022/2380 of the European Parliament and of the Council of 23 November 2022
amending Directive 2014/53/EU on the harmonisation of the laws of the Member States relating to
the making available on the market of radio equipment (Text with EEA relevance).
[i.2] EN IEC 62680-1-3:2021: "Universal serial bus interfaces for data and power - Part 1-3: Common ®
components - USB Type-C Cable and Connector Specification". ®
[i.3] USB-IF specification USB Type-C with USB PD 3.0 support. ®
[i.4] USB-IF specification USB Type-C with USB PD 3.1 support.
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following term
...