Wireless power in AA format creates 'forever battery': Page 2 of 2

November 14, 2017 //By Nick Flaherty
Wireless power in AA format creates 'forever battery'
Ossia has created the world's first wirelessly-powered alternative to disposable AA batteries.

Integrating a wireless power receiver with a rechargeable battery that is trickle charged by the transmitter makes more sense for a portabl eapplicatoins requiring more power. To that end the company launched a reference design kit for Cota Chipset last month

"This marks a milestone for Ossia and another step in establishing Cota as a critical enabler of bringing Real Wireless Power to the world," said Obeidat. "Manufacturers can continue to work with Ossia to access this next-generation reference design kit and build market-ready products. It's another major step towards igniting the wireless power era."

The reference design kit includes two new components: Cota Wireless Power Receiver Chip and Cota Wireless Power Transmitter Chip. Si-Ware Systems provides both Cota chips as application-specific integrated circuits (ASICs) on one of the world's mainstream process nodes for scalability and value. OEMs may license receiver and transmitter reference designs from Ossia together or separately.

With a chip size of 5mm x 5mm, the receiver fits in smartphones, wearables, sensors, and other Internet of Things (IoT) devices. It can receive up to 4W of incoming radio frequency (RF) power from as many as four antennas simultaneously. Compared to earlier designs, the new receiver charges faster, stays cooler, and features ultra-low power sleep mode, which ensures the chip is only activated in range of a transmitter.  

The Cota Wireless Power Transmitter Chip delivers wireless power to devices that contain the Cota Wireless Power Receiver Chip. With a monolithic multiple antenna management chip in the size of 4mm x 4mm, the transmitter can be built into many form factors such as ceiling tiles, tables, desks, glass, televisions, and automobile dashboards. Compared to prior generations, the new transmitter chip charges devices faster, delivering roughly twice as much power safely. The transmitter automatically detects Cota-enabled devices and includes a temperature-sensing unit to prevent overheating.  


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