Richtek is committed to the development of wireless charging solutions after the completion of the merger with MediaTek. Since 2016, Richtek has taken full ownership of all MediaTek's wireless power solution business including product development and strategic planning. In this issue, Richtek is proud to announce that both the RT3181A based MPA5 wireless power transmitter solution and the RT3180W based wireless power receiver solution are fully qualified as WPC Qi EPP (Extended Power Profile) Certified Products.

The WPC Qi standard has become a mature and widely adopted specification. Today’s power hungry mobile phones require higher charging power, so the EPP products with output power up to 15W have gradually gained in popularity in the growing wireless charging power market. In order to shorten time to market, Richtek WPC Qi EPP certified wireless modules can be directly placed into customer prototype designs. Unlike general testing evaluation boards with larger size optimized layouts, Richtek wireless modules are laid out in a tiny configuration which match small prototype dimensions, allowing quick prototype design without massive layout changes. The below pictures show examples of the actual applications.

Since both BPP (Baseline Power Profile <5W) and EPP (Extended Power Profile 5W-15W) qualifications share the same logo, the only way to identify whether a WPC product is qualified as BPP or EPP is by checking the official WPC website. All Richtek WPC Qi EPP solutions are certified products so they are listed on the official WPC website. It is crucial to avoid any compatibility problems or confusion on products marked as ‘fast charging’ or ‘fast wireless charging’ which may only be BPP certified. Please search the WPC website and check the ‘power profile’ for EPP certification. 

In terms of wireless power system efficiency, the RT3181A in MPA5 base performs better than other manufacturers in the range of 10W receiver output power. (Please see the diagram on the right side)

This talk covers the wireless power standard and market information. Two major wireless power standards, WPC and Airfuel Alliance are introduced. Some applications and RT3181 wireless power solutions are demonstrated as well.

This talk covers the circuit design considerations and solutions for magnetic resonant and magnetic inductive wireless power transfer. Richtek RT3180 multi-mode RX solution and design examples are also discussed.

Richtek will host a talk to share our insights on wireless power solutions during the Qi developer conference (Aug 31st, 2017). We will also showcase a broad range of wireless power solutions including standard WPC transmitter/Receiver and medium power WPC modules in the wireless power tradeshow (Sep 1st, 2017). Please see this link for further information.

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