Universal Power Adapter for Mobile Devices

Last updated
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 IEEE 1823-2015 (before approval P1823), is an IEEE standard for power supply design 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. [1]


The standard defines an AC 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 minimum life of adapter was hoped to reduce electronic waste. [4] [5]

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. [6] This can help mobile devices, laptops, many consumer electronic devices, office devices like Ethernet switches/hubs, and wireless 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.


There seem to be no known examples of commercial deployments of UPAMD in end-user devices. When asked about deployment in 2019, the chair for IEEE 1823 working group wrote the following:

Currently the IT market which 1823 standard was originally intended had been swayed by USB SIG to use type C connector as alternatives. However, EU standard body had made inquiry to see if 1823 should be considered as the preferred connector for the next generation of mobile devices. Also, there are new interests from some automotive industry players that are looking at distributing DC bus inside a car (obvious that 1823 with CAN Bus as control method is preferred than USB type C which was not designed for harsh environment).

As for commercial deployment, unfortunately I don’t have a definite answer for you. Several power supply vendor in Asia had made prototypes about 2 years ago but I did not get any further updates after that.

Leonard Tsai, "Status for Universal Power Adapter for Mobile Devices (2019)".


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. [7] The project was sponsored by the Microprocessor Standards Committee of the IEEE Computer Society.

On 15 May 2015 the standard was published as IEEE Std 1823-2015. [8]

See also

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  1. 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.
  2. "UPAMD™ / P1823™, Universal Power Adapter for Mobile Devices". IEEE Standards Association. 2010-06-19. Retrieved 2013-03-17.
  3. "UPAMD/P1823 General Goals" (PDF). 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. IEEE plans to end the power adapter plague
  7. "Project Authorization Request for a New IEEE Standard" (PDF). June 17, 2010. Retrieved August 23, 2011.
  8. IEEE Standard for Universal Power Adapter for Mobile Devices. doi:10.1109/IEEESTD.2015.7106444. ISBN   978-0-7381-9608-4.