ESD April 2025

ENERGY HARVESTING

"outlive the IoT devices they power." This sentiment reflects growing concern among governments, manufacturers, and consumers alike about the environmental footprint of IoT deployment. From a commercial perspective, the maintenance burden of replacing thousands, or even millions, of batteries in large-scale smart building systems is becoming unsustainable. Facility managers and OEMs are actively seeking alternatives that offer long-term cost savings and compliance with emerging regulations. Dual-source and ultra-efficient energy management To meet these demands, e-peas has developed both single- and dual-source energy harvesting ICs capable of extracting power from more than one ambient source. A standout example is the AEM13920, a dual-source PMIC designed to handle two energy inputs simultaneously, such as combining solar with vibration-based harvesting, to improve reliability and energy availability in low-power applications. Other PMICs in the portfolio, like the AEM00920 and AEM10920, are optimised for photovoltaic energy harvesting and integrate high-efficiency boost and buck converters along with direct charging of

energy storage elements. This makes them ideal for compact applications such as door sensors, motion detectors, and air quality monitors, devices that are typically installed in hard-to-reach locations where battery replacement is costly and inconvenient. Real-world applications in smart environments The versatility of e-peas' energy harvesting ICs allows for integration across a broad spectrum of smart building applications. Presence detectors powered by ambient light, CO₂ sensors that never need a battery swap, and door-open sensors fuelled

43 ELECTRONICSPECIFIER.COM

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