Qi-Certified, medium power transmitter, wireless charging reference design

November 18, 2015 // By Graham Prophet
Rohm has received certification from WPC (Wireless Power Consortium) for its reference design using the BD57020MWV wireless power transmitter IC. This, Rohm believes, is the first device certified to be compliant with the new Qi medium power specification.

WPC’s Qi standard for medium power has attracted attention as a next-generation standard for inductive power transmission that will enable wireless charging of tablet PCs while allowing smartphones and other mobile devices to be charged up to three-times faster than the existing low power standard (5W). A Foreign Object Detection (FOD) function is included to provide greater safety by detecting foreign metallic objects before power transfer to protect against possible damage due to overheating.

Rohm has developed a reference design that is expected to not only facilitate the introduction of wireless charging in new applications requiring higher power, but also accelerate adoption in applications that can benefit from wireless charging. A datasheet containing application circuit examples of the reference design can be found at:


Next, Rohm anticipates receiving Qi certification under the medium power standard for a reference design using the BD57015GWL wireless power receiver IC.

Rohm Semiconductor; www.rohm.com/eu