Title :
A 2.5-V, 160-μJ-output piezoelectric energy harvester and power management IC for batteryless wireless switch (BWS) applications
Author :
Joonseok Yang ; Minbok Lee ; Myeong-Jae Park ; Sung-Youb Jung ; Jaeha Kim
Author_Institution :
Dept. Electr. & Comput. Eng. & Inter-Univ. Semicond. Res. Center, Seoul Nat. Univ., Seoul, South Korea
Abstract :
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-mm2 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.
Keywords :
CMOS integrated circuits; energy harvesting; inductive power transmission; inductors; integrated circuit design; piezoelectric transducers; pulse frequency modulation; switches; switching convertors; BWS; HV CMOS; PMN-PT disc; batteryless wireless remote switch; bias-flipping inductor; distance 10 m; energy 160 muJ; initial charging loss; memory size 4 Byte; piezoelectric-based energy harvesting; power management IC; series-parallel switched-capacitor converter; single button-pressing action; size 0.25 mum; step-down buck regulator; variable on-time PFM control; voltage 2.5 V; Capacitors; Inductors; Integrated circuits; Rectifiers; Switches; Switching circuits; Wireless communication;
Conference_Titel :
VLSI Circuits (VLSI Circuits), 2015 Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-4-86348-502-0
DOI :
10.1109/VLSIC.2015.7231291
