|Title||Input-powered energy harvesting interface circuits with zero standby power|
|Publication Type||Conference Paper|
|Year of Publication||2011|
|Authors||Rao, Y., and D. P. Arnold|
|Conference Name||Applied Power Electronics Conf. & Exposition (APEC 2011)|
|Conference Location||Fort Worth, TX|
This paper presents an input-powered energy-harvesting interface circuit that eliminates standby power consumption by automatically shutting down when the ac input voltage amplitude is too low for successful energy reclamation. The interface comprises an input-powered ac/dc converter and aninput-powered dc/dc boost converter that are fabricated in ON Semi 3M-2P 0.5 μm CMOS process. The interface circuit starts up when the ac input amplitude exceeds 1 V and supplies a regulated dc output up to 3 V. When the inputamplitude drops below 600 mV, the interface automatically enters standbymode and consumes no power. The system achieves a maximum efficiency of 60% with 1.5 V ac input amplitude and 3 V regulated dc output, delivering 3.9 mW of output power. The interface also functions properly in tests with an electrodynamic (magnetic) vibrational energy harvester.