Universal Power Adapter for Mobile Devices

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Universal Power Adapter for Mobile Devices
Type Power Adapter
Designer IEEE UPAMD Working Group
Hot pluggable Yes
Daisy chain Yes
Signal charging power 10–240 W

The Universal Power Adapter for Mobile Devices (UPAMD), codename P1823, is an IEEE group working on power supply standards that caters to the power range of 10–130 W (optionally 240 W) for mobile devices like laptop computers. The standardization process seems to have stalled, with the working group having held no meetings since September 2012.


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.[1] 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.[1]

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).[2] 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.[3] This helps mobile devices, laptops, many consumer electronic devices, corporate devices like Ethernet switches/Hubs, and Wi-Fi routers to use the same power adapter. This specification defined a minimum life of adapter which was hoped to reduce electronic waste.[4][5] This specification defines a communication channel between device and adapter to negotiate the requirements and supply.

From 2010 to September 2012, at least one meeting was held every month.[6] As of June 2014, the last meeting of the group was in September 2012.[7] A draft report was expected in December 2013. [8]

Connect/disconnect requirements[edit]

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.[9]

See also[edit]


  1. ^ a b "Project Authorization Request for a New IEEE Standard". June 17, 2010. Retrieved August 23, 2011. 
  2. ^ "UPAMD™ / P1823™, Universal Power Adapter for Mobile Devices". IEEE Standards Association. 2010-06-19. Retrieved 2013-03-17. 
  3. ^ "UPAMD/P1823 General Goals". IEEE UPAMD/P1823 working group. April 26, 2011. Retrieved August 23, 2011. 
  4. ^ "Green Plug Lauds Industry Effort to Drive Standards For Smart Power Adapters". News release (Green Plug). October 12, 2010. Retrieved August 23, 2011. 
  5. ^ Yen-Shyang Hwang, Taipei; Willie Teng (July 5, 2010). "Taiwan notebook companies support PSU standardization". Digi Times. Retrieved August 31, 2013. 
  6. ^ http://grouper.ieee.org/groups/msc/upamd/meetings/Minutes/
  7. ^ http://grouper.ieee.org/groups/msc/upamd/meetings/Minutes/
  8. ^ P1823 progress
  9. ^ Bob Davis (March 17, 2011). "UPAMD Low Energy Connect and Disconnect". 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. 

External links[edit]