Universal Power Adapter for Mobile Devices
|Designer||IEEE UPAMD Working Group|
|Signal||charging power 10–240 W|
The Universal Power Adapter for Mobile Devices (UPAMD), codename P1823, is an IEEE group working on global power supply standards intended to cater to the power range of 10–130 W (optionally 240 W) for mobile devices like laptop computers. The power supply was required to have an output capacitive energy of less than 15.1 µJ and an inductive energy at disconnect of less than 5.3 µJ.
The standard defines a power adapter to power devices requiring from 10 W to 130 W (~20 V × 6.5 A) or (extended voltage option) up to 240 W (60 V × 4 A). A new connector (that does not mate with any previously existing connector) is proposed for a lifetime of about ten years with multiple brands and models. This minimum life of adapter was hoped to reduce electronic waste.
A common Direct Current power plug is intended to make life easier by eliminating the confusion regarding what voltage and current transformer one needs to buy and carry. This can help mobile devices, laptops, many consumer electronic devices, corporate devices like Ethernet switches/hubs, and Wi-Fi routers to use the same power adapter around the world.
This specification defines a communication channel between device and adapter, to negotiate the requirements and supply.
The Standards Association of the Institute of Electrical and Electronics Engineers (IEEE) approved the Universal Power Adapter for Mobile Devices working group on June 17, 2010. Sponsored by the Microprocessor Standards Committee of the IEEE Computer Society, it was given the project number 1823. This means proposed standards will be known as "P1823", with the "P" removed and replaced with a dash and year when and if the proposal is ratified.
As of September 2014, the standard had been submitted to the IEEE Standards Review Committee, for December 2014 review and possible approval by the IEEE Standards Association Standards Board.
On 15 May 2015 the standard was published as IEEE Std 1823-2015. 
- USB Power Delivery specification
- IEC Technical Specification 62700: DC Power supply for notebook computer
- Common External Power Supply
- Bob Davis (March 17, 2011). "UPAMD Low Energy Connect and Disconnect" (PDF). IEEE. Retrieved August 31, 2013.
The UPAMD power source, and cable, plus 2 connectors, must have a stored capacitive energy of less than 15.1uJ and a voltage of less than 17V. The stored inductive energy at the time of disconnect should be less than 5.3uJ.
- "UPAMD™ / P1823™, Universal Power Adapter for Mobile Devices". IEEE Standards Association. 2010-06-19. Retrieved 2013-03-17.
- "UPAMD/P1823 General Goals" (PDF). IEEE UPAMD/P1823 working group. April 26, 2011. Retrieved August 23, 2011.
- "Green Plug Lauds Industry Effort to Drive Standards For Smart Power Adapters". News release. Green Plug. October 12, 2010. Retrieved August 23, 2011.
- Yen-Shyang Hwang, Taipei; Willie Teng (July 5, 2010). "Taiwan notebook companies support PSU standardization". Digi Times. Retrieved August 31, 2013.
- "Project Authorization Request for a New IEEE Standard" (PDF). June 17, 2010. Retrieved August 23, 2011.