Bluetooth Switch Reference Design from ON Semiconductor Uses Only Harvested Energy

Phoenix, Arizona-based firm ON Semiconductor, introduced its Bluetooth Low Energy Switch reference design that operates entirely from harvested energy. The platform demonstrates how the RSL10 System-in-Package (SIP) can enable Bluetooth 5 devices that are battery-less and entirely self-powered. Potential applications include lighting control, building automation, and asset tracking.

ON Semiconductor introduced a low energy Bluetooth Switch reference design with energy harvesting from a button press.

ON Semiconductor introduced a low energy Bluetooth Switch reference design with energy harvesting from a button press.

The Energy Harvesting Bluetooth Low Energy Switch couples the very low-power RSL10 SIP with the unique energy-harvesting technology from ZF Friedrichshafen AG. ZF designed the switch to capture the kinetic energy transferred when a user presses a button and converts it to electromagnetic energy. Then, it stores that tiny amount of energy for use by the RSL10 SIP.

With each press of the button, the fully integrated energy harvesting solution generates 300 μJ, enough to meet the meager power requirements of the RSL10 SIP, which consumes just 62.5nW in a deep sleep and only 10 mW when transceiving.

The design features a fully-integrated antenna, RSL10 radio, and all passive components. Also, the Switch reference design comes with a complete bill of materials, schematics, PCB layout, and Gerber files, as well as free use of the switch-side firmware.

The included source code offers a platform from which to develop application code, and the documentation features detailed explanations of how to customize the firmware and connect the reference design to a Bluetooth Low Energy scanner application on a smartphone or tablet.

Notably, the new energy harvesting switch design does not employ a buck/boost converter. It comes with a smart dimming function.

Wiren Perera, who heads IoT at ON Semiconductor commented, “Along with the reference hardware design, ON Semiconductor provides a firmware suite, which can be customized using the RSL10 Software Development Kit (SDK).”

ON Semiconductor indicated that the switch is compatible with its IoT Development Kit and Bluetooth Low Energy IoT Development Kit, which both include a comprehensive portfolio of sensors, connectivity, and actuator devices.