Major Milestones for V1.2 Resonant Specification

WPC’s v1.1 specification, supported by the largest ecosystem comprising over 200 member companies, enables the most efficient and cost-effective wireless power solutions based on inductive power, close-coupled technology. 

WPC’s Resonant Task Force (RTF) will deliver an extension for WPC v1.1 specification for a best-in-class magnetic resonance technology to address applications that require multi-device charging, increased spatial freedom, increased charging at distance (Z-height), and devices that are designed for different power levels. 

The RTF has set high goals for backward compatibility to existing v1.1 specification, efficiency, transmitted power, FOD, thermal design, and other critical parameters. Meeting these goals would result in the most advanced and compelling products addressing a broad set of applications such as smartphones, tablets, PCs, wearables, automotive, and infrastructure.

Members saw significant achievements and progress at WPC’s Leeuwarden meeting in June, last month.  After hundreds of combined engineering hours by 5 of the world’s leading companies, here’s what happens with an open standards organization when the best minds in the industry collaborate:

  • Q1.1 receivers based on inductive v1.1 specification and charging at a Z-height of 7 mm, are now capable being charged at a Z-height of 30 mm
  • New magnetic resonance v1.2 receivers can now be charged at Z-height of 45mm, expecting further Z-Height in final production designs
  • Backward compatibility between Qi v1.1 and Qi 1.2 systems (v1.1 receivers charging on v1.2 transmitters, v1.2 receivers charging on v1.1 transmitters), allowing consumers protection of investment
  • Multi-device V1.2 Receivers charging on a v1.2 transmitter with one inverter, delivering lowest cost designs

Figure 1 - Multiple manufacturers demonstrating Qi1.1 and Qi1.2 resonant systems


Figure 2 - LG v1.2 resonant Tx's delivering power to v1.1 inductive Rx and v1.2 resonant Rx


Figure 3 - LG resonant Tx delivering power to PowerbyProxi resonant Rx


Figure 4 - Philips resonant Tx delivering power to PowerbyProxi resonant RX at distance of 45mm Z height


Figure 5 - Convenient Power Tx delivering power to PowerbyProxi resonant RX at distance of 18mm Z height


The plug-fest was festive indeed!

The WPC is an open standards organization enabling the use the best ideas from any company. That’s why Qi sets the standard for wireless power transfer.


Tony Francesca
Chairman of the Resonance Taskforce



Major Milestones for V1.2 Resonant Specification