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  Date: 22/12/2016

Wireless charging reference designs widen application-net

Wireless charging and fast charging are two important features on latest smart phones. Although some of the smart phones facing battery issues, fast charging is already a sought-after feature in latest Smart phones. Wireless charging too a fast-growing trend among smartphone users. Year 2015 has seen significant growth in usage of wireless charging for smart phones. And the trend is continued in the year 2016 and expected to see Wireless charging in lot more mid-range phones in year 2017 and further.

One of the semiconductor vendor who is progressing well in this area is Integrated Device Technology, Inc. (IDT), which had successfully launched below 5 Watts reference designs for wireless charging has now added 15W wireless power reference design kit meeting the latest Wireless Power Consortium Qi 1.2.2 specs. Operating at efficiency of 87%, the new reference design is suitable for charging high power portables such as tablet computers, industrial portable scanners, Bluetooth speakers and mobile accessories such as charging pads, smartphone sleeves and cases. So its not only smart phones having cordless charging, the overall application of wireless charging is widened to cover lot more devices with the power range increasing.

Chris Stephens, general manager of IDT’s Wireless Power Division said “Our wireless power chips are in products from many of the world’s most respected brands, and now, with our full complement of kits, companies of all sizes have an easy path to offer their customers the benefits inherent in wireless power.”

The new kit is using IDT P9242-R transmitter and P9221-R receiver semiconductor chips, The kit is designed to achieve optimized thermal design and easy integration with the drop-in reference layout provided.

The kit’s layout module enables direct instantiation on to a system board and is also provided with optimized and fully tested Bill of material of components (BOM) to ease the component selection. The other design reference material made available with this kit includes user manuals, layout guides, layout instantiation modules, circuit diagram schematics, bill-of-materials (BOM), Gerber files, and more.

The new wireless power kit containing the transmitter, receiver and additional coils is available now at a suggested retail price $325 (for transmitter and receiver). More info is available at http://www.idt.com/go/wpkits.

Another company called iOssia exclusively focusing on wireless charging electronics, has released the reference design kit for its wireless charging devices named Cota receivers. Wireless power system engineers can use the reference design kit to incorporate Cota into their products.

The kit contains the Cota receiver chip, sample hardware, software components, testing instructions. Cota reference design kit is fully documented and reusable in OEM designs so that time is saved in in launching new products.

Recently Ossia was allowed a ninth U.S. patent for a core technology used in the remote wireless charging. The newly allowed patent covers pulsed power per need at the receiver(s).

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