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EETE SEP 2014

An inflexion point for energy harvesting and IoT is nigh By Tony Armstrong The portable power application space is both broad and diverse. Products range from wireless sensor nodes (WSNs) that consume average power measured in microwatts to cartbased medical or data acquisition systems with multi-hundred Watt-hour battery packs. However, despite this variety, a few trends have emerged; namely, designers continue to demand more power in their products to support increased functionality and they want to charge the battery from any available power source. The first trend would imply increasing battery capacities. Unfortunately, users are often impatient and these increased capacities must be charged in a reasonable amount of time, which leads to increased charge currents. The second trend requires tremendous flexibility from the battery charging solution since they need to handle a broad range of input sources and power. Furthermore, the proliferation of wireless sensors supporting the “Internet of Things” (IoT) has increased the demand for small, compact and efficient power converters tailored to untethered lower power devices. Tony Armstrong is Director of Product Marketing at Linear Technology Corporation – www.linear.com www.electronics-eetimes.com Electronic Engineering Times Europe September 2014 25


EETE SEP 2014
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