A 2.5-V, 160-μJ-output piezoelectric energy harvester and power management IC for batteryless wireless switch (BWS) applications

A piezoelectric-based energy harvesting and power management IC that can supply a total energy of 160-μJ at 2.5V from a single button-pressing action to realize a batteryless wireless remote switch (BWS) is presented. The IC uses a 6:1 series-parallel switched-capacitor converter and a bias-flipping...

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Bibliographic Details
Main Authors: Yang, Joonseok, Lee, Minbok, Park, Myeong-Jae, Jung, Sung-Youb, Kim, Jaeha
Format: Conference Proceeding
Language:English
Subjects:
Capacitors
Electric potential
Energy harvesting
Energy management
Harvesters
Inductors
Integrated circuits
Power management
Rectifiers
Switches
Switching circuits
Wireless communication
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Summary:A piezoelectric-based energy harvesting and power management IC that can supply a total energy of 160-μJ at 2.5V from a single button-pressing action to realize a batteryless wireless remote switch (BWS) is presented. The IC uses a 6:1 series-parallel switched-capacitor converter and a bias-flipping inductor to match the impedance, down-convert the voltage, and maximize the total energy harvested from a 300-mm 2 PMN-PT disc. Also, a step-down buck regulator employs a variable on-time PFM control to keep the initial charging loss below 12-μJ without degrading load regulation at 2.5V. Using this IC fabricated in a 0.25-μm HV CMOS, a batteryless wireless switch that can successfully transmit a 4-byte-long message over a 10-m distance is demonstrated.
ISSN:2158-5601
2158-5636
DOI:10.1109/VLSIC.2015.7231291