The World's First Qi-Certified Medium Power Transmitter Reference Design --Cutting-edge Reference Design will Allow ROHM to Expand into the Wireless Charging Segment

Cutting-edge reference design will allow ROHM to expand into the wireless charging segment ROHM has received certification from WPC (Wireless Power Consortium) for its reference design using the BD57020MWV wireless power transmitter IC. This is the first device in the world 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 3x faster than the existing low power standard (5W). In addition, 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.

In addition to pioneering the development of a wireless power transmitter IC (BD57020MWV) compliant with the Qi medium power specification, 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:

Going forward, ROHM will continue to provide safe, easy-to-use, end-to-end wireless power solutions, and is currently scheduled to receive Qi certification under the medium power standard for a reference design using the BD57015GWL wireless power receiver IC.

Wireless power technology is garnering increased interest in the mobile device market due to the capability of charging a variety of devices using a single charging pad while also contributing to improved device safety and reliability by enabling device connectors to be made more water-resistant and dust-proof.

In addition, standards organizations aimed at popularizing wireless power such as WPC are being established in order to formulate international standards for not only devices such as smartphones, but also infrastructure, including hotels, airport lounges, and vehicles, in the US and Europe.

As a regular member of WPC, ROHM actively participates in working groups from the initial stages of specification development of the increasingly popular Qi wireless power standards and has been quick to develop compliant products that meet market needs. ROHM is also the first supplier in the world to offer a reference design for medium power that has passed interoperability tests with more than 200 Qi-certified devices, and to have successfully acquired Qi certification under the medium power specification.

BD57020MWV Wireless Power Transmitter IC

Description: Wireless Power Transmitter compliant with WPC's Qi Medium Power Specification

Start of Mass Production (Planned) Dec. 2015 (Samples currently available)

Production Capacity (Planned): 100 kpcs/month


WPC (Wireless Power Consortium)

A standards organization established for the purpose of formulating and promoting the Qi international standard for wireless power. WPC is currently the world's largest international standards organization for wireless power.

Qi Certification

Only devices that have passed compliance and interoperability tests at WPC-certified test labs can obtain certification.

Qi Medium Power Standard (Qi Version 1.2 Extended Power Profile)

The latest version of the WPC Qi standard that expands the power range from 5W (low power) to 15W (medium power) in response to the growing need for fast wireless charging in the portable mobile market.

Reference Design

Asample circuit design that has been tested and can be used by customers as a reference in their own designs.

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