Common External Power Supply
In 2009 several government, consumer and industry initiatives resulted in the specification of a common External Power Supply (EPS) for use with data-enabled mobile phones sold in the European Union. The "external power supply" is the AC power adapter that converts household AC electricity voltages to the much lower DC voltages needed to charge a mobile phone's internal battery. Although compliance is voluntary, a majority of the world's largest mobile phone manufacturers agreed to make their applicable mobile phones compatible with Europe's common External Power Supply.
- 1 Purpose
- 2 History
- 3 Technical specifications
- 4 Reception
- 5 Pending / future European legislation
- 6 Similar regional and global industry initiatives for mobile phone charging
- 7 Other higher power / higher voltage charging standards for mobile devices
- 8 References and notes
- 9 External links
According to the European Commission (EC), a common external power supply / "charger" standard is desirable because,
- "Incompatibility of chargers for mobile phones is a major environmental problem and an inconvenience for users across the European Union. Currently specific chargers are sold together with specific mobile phones. A user who wants to change his/her mobile phone must usually acquire a new charger and dispose the current one, even if this is in perfect condition. This unnecessarily generates important amounts of electronic waste. ...Harmonising mobile phone chargers will bring significant economic and environmental benefits. ...Consumers will not need to buy a new charger together with every mobile phone,..."
In June 2009, many of the world's largest mobile phone manufacturers signed an EC-sponsored Memorandum of Understanding (MoU), agreeing to make most new data-enabled mobile phones marketed in the European Union compatible with a to-be-specified common External Power Supply (EPS). All signatories agreed to develop a common specification for the EPS "to allow for full compatibility and safety of chargers and mobile phones." 14 mobile phone manufacturers and technology providers signed the MoU — the original 10 signatories, Apple, LG, Motorola, NEC, Nokia, Qualcomm, RIM, Samsung, Sony Ericsson, and Texas Instruments as well as Atmel, Emblaze Mobile, Huawei Technologies and TCT Mobile (Alcatel).
In order to develop and formalize the needed technical standards, the European Commission issued a standardisation mandate to CEN, CENELEC and ETSI on a common "Charging Capability for Mobile Telephones." In response, CENELEC created a task force to develop the interoperability specifications of a common external power supply. The resulting technical specifications were published in December 2010 as EN 62684:2010, "Interoperability specifications of common external power supply (EPS) for use with data-enabled mobile telephones."
The Common EPS Memorandum of Understanding expired at the end of 2012. The European Commission reported that all of the MoU signatories, "have met their obligations under the MoU," but that most of the signatories declined an EC request to extend the MoU beyond 2012.
Reference to USB battery charging specification
The common EPS specification relies heavily on existing USB electro-mechanical standards - especially the USB Battery Charging Specification. By the mid-2000s, many mobile phone manufacturers (as well as manufacturers of other small battery-powered devices) had already begun designing their products with the ability to use a USB port's 5 V DC power to recharge batteries. The USB Implementers Forum, recognizing this trend, updated the USB standard in 2007 to better accommodate this popular battery-charging application of USB ports, primarily by defining "charging ports" which can provide more current allowing faster re-charging of batteries. In March 2011, the USB Implementers Forum agreed to allow CENELEC "...to make reference to USB technology in its European Standard EN 62684:2010 and...to grant download access to USB technical specifications free of charge and at any time to manufacturers implementing this European [common EPS] Standard."
Cabling, connectors and adapters
A common EPS must include a cable with a Micro USB-B connector for connecting to a mobile phone. This cable can be either 'captive' (permanently attached to the power supply) or detachable. If detachable, the cable must connect to the power supply via a standard USB-A receptacle / connector.
The MoU which defines the common external power supply as well as the related EC standardisation mandate both allow for the use of the common external power supply also with phones not equipped with a Micro-USB receptacle. "...[MoU] 4.2.1...if a manufacturer makes available an Adaptor from the Micro-USB connector of a Common EPS to a specific non-Micro-USB socket in the Mobile Phone, it shall constitute compliance to this article" and, "...An Adaptor can also be a detachable cable."
The type of AC "plug" provided on a common EPS can vary depending on the intended market of use. "Per regulatory requirements for each market. ... preferred supplied input voltage range should be at least 90–264 V" (100–240 V +/-10%)
The common EPS initiative was generally well received by the public, although at least one European consumer group bemoaned the voluntary nature and narrow scope of the initiative (applies only to "hand-held" "data-enabled" "mobile phones") and the fact that the EU's EPS specification does not set aggressive energy efficiency no-load consumption requirements.
Some observers, noting Apple's continued use of proprietary, non-micro USB charging ports on their smartphones, suggested Apple was not in compliance with the 2009 Common EPS Memorandum of Understanding. The European Commission however, confirmed that all MoU signatories, "have met their obligations under the MoU." Specifically, "Concerning Apple’s previous and present proprietary connectors and their compatibility with the agreement, the MoU allows for the use of an adaptor without prescribing the conditions for its provision" and "The [Apple] iPhone 5 can be used with an adaptor allowing it to be connected to the common charger."
Pending / future European legislation
In a 2013 amendment to a "Proposal for a Directive of the European Parliament … relating to the making available on the market of radio equipment" the European Committee on the Internal Market and Consumer Protection included a recommendation for "…A renewed effort to develop a common charger …[being] highly desirable and consequently…beneficial in particular for consumers and other end-users." Unlike the 2009 Common EPS MoU, which only applied to mobile phones that are "data-enabled" and "hand-held" (e.g. "smartphones"), the Parliamentary proposal applies to all radio equipment (any "product which intentionally emits or receives radio waves for communication") including mobile phones, tablet computers, car door openers, modems, etc.
Similar regional and global industry initiatives for mobile phone charging
Other mobile phone power supply and charging standards have been implemented in other parts of the world (e.g., Korea and China). A proposal for a global/industry-wide mobile phone charging solution is also being promoted by industry organizations GSMA and OMTP. The GSMA/OMTP proposal is very similar to the European and Chinese charger standards although the GSMA/OMTP proposal is less flexible and has not yet been adopted by as many phone manufacturers as has the EU standard.
Charger and interface standard in South Korea
In March 2001, the Korean Telecommunications Technology Association (TTA) released a "Standard on I/O Connection Interface of Digital Cellular Phone". This standard describes the electromechanical interface specifications for cellular phone charging, wired data communication, analog audio, etc. and was released together with related test and certification specifications. The main feature of the standard is the specification of a 24-pin connector/socket for mobile phones to handle connections for power input (battery charging) and output, data communication (USB and other digital signals), analog audio inputs and outputs (for hands-free microphone, earphone) and other signals. The 2007 revision of the standard specified a smaller 20-pin connector to succeed the 24-pin connector and added analog (composite) video output support, among other changes. Chargers with the new 20-pin connectors started appearing in 2008 and phone manufacturers were urged to include 24-20-pin adapters with new phones sold in Korea to enable the charging of new phones with the older 24-pin chargers.
Charger and interface standard in the People's Republic of China
In December 2006, the Chinese Ministry of Industry and Information Technology (MII) released a new CCSA (China Communications Standards Association) standard, "Technical Requirements and Test Method of Charger and Interface for Mobile Telecommunication Terminal Equipment". This standard describes the electromechanical requirements for a common mobile device battery charger equipped with a USB-A socket providing 5 V DC power. All new mobile phones requesting network access approval in China from June 2007 are required to support charging from the new common chargers. The original 2006 regulation is flexible regarding the interface on the mobile phone itself, allowing for the use of adapter cables if the mobile device is not equipped with a standard USB connector. Among other things, the 2009 update adds references to USB On-The-Go (OTG) support and the use of USB Micro-B, USB Micro-AB, USB Mini-B, Mini-10-pin and cylindrical ("barrel") type connectors on the terminal (phone) for charging.
GSMA / OMTP Universal Charging Solution (UCS) / Common Charging Solution (CCS)
In February 2009, the GSM Association (GSMA), together with six mobile phone manufacturers / technology providers and eleven mobile service providers, announced their commitment to implementing a cross-industry standard for a common/universal charging solution for new mobile phones and chargers. The aim of the GSMA initiative is "...to ensure that the mobile industry adopts a common format for mobile phone charger connections and energy-efficient chargers...". Universal Charging Solution (UCS) chargers are required to use Micro-USB as the common universal charging interface and have a 4-star or higher efficiency rating (standby energy use ≤0.15 W).
OMTP (the Open Mobile Terminal Platform industry forum) specified the requirements of the GSMA's Universal Charging Solution and published these requirements under the title "Common Charging and Local Data Connectivity" in 2009. This document specifies the three components of a Common Charging Solution (CCS): a Charging and Local Data Connector (CLD) on the "terminal" (e.g., a mobile phone) consisting of a USB Micro-B or USB Micro-AB socket; a Common Power Supply (CPS) with a USB-A socket; and a detachable USB-A to USB Micro-B cable to connect the power supply with the mobile phone. As of early 2011, an additional 10 service providers and one additional mobile phone manufacturer have joined the agreement.
ITU Universal power adapter and charger solution
The ITU (International Telecommunication Union = the United Nations specialized agency in the field of telecommunications, information and communication technologies) announced in October 2009 that it had also embraced the Universal Charging Solution standard—based on input from the GSMA—as its "energy-efficient one-charger-fits-all new mobile phone solution." The ITU published Recommendation ITU-T L.1000, specifying a charger similar in most respects to that of the GSMA/OMTP proposal and of the Chinese charger and the EU's common EPS. The ITU specifies that the OMTP's more aggressive "preferred" no load consumption requirement be mandatory after a 3 year "transition period" but is more flexible in allowing the use of captive cables and micro USB-B adapters in its "target solution" - similar to the European common EPS standard. The ITU recommendation was expanded and updated in June, 2011.
Other higher power / higher voltage charging standards for mobile devices
USB Power Delivery specification
In 2012, the USB Power Delivery (PD) specification was released. The USB PD specification provides the ability for 5 V devices to draw more than (the USB Battery Charging specification limit of) 7.5 W of power from USB "PD-aware" ports when using PD-aware USB cables. The specification also allows USB PD ports to provide even greater power at higher voltages over PD-aware cables - up to 36 W at 12 V and 60 W at 20 V (for micro-USB connectors) and up to 60 W at 12 V and 100 W at 20 V (for standard USB A/B connectors).
IEEE P1823 UPAMD
IEEE P1823 is a proposed global standard for a Universal Power Adapter for Mobile Devices (UPAMD) that require between 10 W and 240 W. e.g. Laptop PCs, larger tablets and other mobile devices that can require much more power than the current USB battery charging specification limit of 7.5 W at 5 V.
References and notes
- "EUROPA - Press Releases - Harmonisation of a charging capability of common charger for mobile phones". Europa.eu. 2009-06-29. Retrieved 2010-08-26.
- "Cellphone charger harmonization". ec.europa.eu. Retrieved 2011-01-21.
- "New standard for common mobile chargers". cenelec.eu. 2011-01-11. Retrieved 2011-01-21.
- "One size-fits-all mobile phone charger: IEC publishes first globally relevant standard". International Electrotechnical Commission. 2011-02-01. Retrieved 2012-02-20.
- "Tajani: Common charger for small electronic devices". EC Enterprise & Industry Magazine. 2013-04-25. Retrieved 2013-09-28.
- USB Battery Charging specification released in March, 2007 (version 1.0) with updates in 2009 (version 1.1) and 2010 (version 1.2) permits appropriately designed USB devices to, "...draw current in excess of the USB 2.0 specification for charging and/or powering up..."
- "USB-IF Enhances Battery Charging Capabilities with New Spec." (PDF). 2007-04-17. Retrieved 2011-02-21.
- "Agreement reached on the Micro-USB connector and the standard for the common mobile charger..." (PDF). 2011-03-01. Retrieved 2011-03-06.
- "Annex II, Technical Annex to MoU regarding the Harmonisation of a Charging Capability for Mobile Phones" (PDF). 2010-01-12. Retrieved 2011-02-26.
- "MoU regarding Harmonisation of a Charging Capability for Mobile Phones" (PDF). 2009-06-05. Retrieved 2011-01-06.
- "Standardisation mandate to CEN, CENELEC and ETSI on a common Charging Capability for Mobile Telephones" (PDF). 2009-10-01. Retrieved 2011-01-21.
- "The universal charger: not quite universal yet" (PDF). 2010-12-29. Retrieved 2011-02-26.
- "Memorandum of Understanding on common mobile charger delivers three years on" (in English). digitaleurope. 2012-10-29. Retrieved 2013-09-29.
- "Tajani: Common charger for small electronic devices". EC Enterprise & Industry Magazine. 2013-04-25. Retrieved 2013-09-28.
- "Answer given by Mr Tajani on behalf of the Commission". European Parliament. 2013-08-21. Retrieved 2013-09-28.
- "Answer given by Mr Tajani on behalf of the Commission". European Parliament. 2013-03-13. Retrieved 2013-09-29.
- "Radio equipment: harmonisation of the laws of the Member States relating to the making available on the market". European Parliament / Legislative Observatory. Retrieved 2013-09-30.
- "Opinion of the European Economic and Social Committee on the ‘Proposal for a directive of the European Parliament and of the Council on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment'…". Eur-Lex.europa.eu. 2013-05-09. Retrieved 2013-09-29.
- "Standard on I/O Connection Interface of Digital Cellular Phone" TTAS.KO-06.0028 released in March 2001. Later updated in 2002 (/R2), and in 2007 (/R4)
- Related test and certification standards published (TTAS.KO-06.0029 and TTAS.KO-06.0030).
- Standard on Integrated I/O Connection Interface for Mobile Phone, Korean Telecommunications Technology Association (TTA), 2001-11-08
- (2007 revision = TTAS.KO-06.0028/R3)
- TTA certifies first 20-pin battery charger for mobiles, Telecompaper.com, 2008-07-25
- "Technical Requirements and Test Method of Charger and Interface for Mobile Telecommunication Terminal Equipment" (CCSA YD/T 1591-2006, later updated to YD/T 1591-2009)
- "How to conform to China's new mobile phone interface standards". EETimes.com. 2007-10-22. Retrieved 2011-02-21.
- "YD 1591-2009 移动通信终端电源适配器及充电/数据接口技术要求和测试方法 ((introduction to) Mobile Communication Terminal Adapter and Charging / Data interface Technical Requirements and Test Methods)". China Communications Standards Association (CCSA.org.cn). 2010-08-04. Retrieved 2011-04-05.
- "MOBILE INDUSTRY UNITES TO DRIVE UNIVERSAL CHARGING SOLUTION FOR MOBILE PHONES".
- OMTP: Common Charging and Local Data Connectivity V1.0, 2009-02-11 (Final revision V1.1 published in 2010)
- "Partners". 2011. Retrieved 2011-04-10.
- "Press Release: CTIA–The Wireless Association® Announces One Universal Charger Solution to Celebrate Earth Day". ctia.org. 2009-04-22. Retrieved 2011-01-21.
- "Press Release: Universal phone charger standard approved — One-size-fits-all solution will dramatically cut waste and GHG emissions". Itu.int. 2009-10-22. Retrieved 2009-11-04.
- "Universal power adapter and charger solution for mobile terminals and other hand-held ICT devices". International Telecommunications Union. 2011-06-13. Retrieved 2013-03-23.
- "USB Power Delivery". usb.org. 2012. Retrieved 2013-02-25.
- "IEEE Project P1823 - Standard for a Universal Power Adapter for Mobile Devices". ieee.org. Retrieved 2013-02-25.
USB battery charging:
- Battery Charging v1.2 Spec. and Adopters Agreement USB Implementers Forum, 2010-12-07.
EU common External Power Supply:
- One Charger For All.eu, European Commission Enterprise and Industry Directorate - General
- MoU regarding Harmonisation of a Charging Capability for Mobile Phones, 2009 June 5
- M/455 EN - Standardisation mandate to CEN, CENELEC and ETSI on a common Charging Capability for Mobile Telephones, 2009 October 1
- EN 62684:2010 "Interoperability specifications of common external power supply (EPS) for use with data-enabled mobile telephones"
- EN 301489-34 V1.1.1 (Final draft 2010-05) "ElectroMagnetic Compatibility (EMC) standard for radio equipment and services - Part 34: Specific conditions for External Power Supply (EPS) for mobile phones"
Other (non-EU) initiatives:
- Universal Charging Solution, GSMA, 2012-01-25
- OMTP DOCUMENTS.1.1 – OMTP COMMON CHARGING AND LOCAL DATA CONNECTIVITY V1.1, 2012-05-12.
- Recommendation ITU-T L.1000: "Universal power adapter and charger solution for mobile terminals and other hand-held ICT devices" Edition 2.0, 2011-06-13
- CCSA YD/T 1591-2006, "Technical Requirement and Test Method of Charger and Interface for Mobile Telecommunication Terminal Equipment", Published by the Ministry of Information and Industry (MII) of the People's Republic of China. 2006-12