TY - GEN
T1 - An ultra-low quiescent current power management ASIC with MPPT for vibrational energy harvesting
AU - Fan, Shiquan
AU - Zhao, Liuming
AU - Wei, Ran
AU - Geng, Li
AU - Feng, Philip X.L.
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/9/25
Y1 - 2017/9/25
N2 - We present an ultra-low quiescent current power management integrated circuit (IC) for interfacing with a piezoelectric (PZE) energy harvester in a self-powering wireless sensor node. The PZE harvester first transforms mechanical energy from vibration into electricity. The AC output from the PZE is then converted into DC power using a full bridge rectifier, and charges a small filter capacitor. The energy is further transferred into a supercapacitor by a Buck-Boost converter with high efficiency, using an impedance matching load to achieve maximum power point tracking (MPPT). A low-dropout (LDO) regulator powers the on-chip CMOS sensor and an external RF transmitter with the energy stored in the super capacitor, providing clean power supply, forming a complete wireless temperature sensor node, which can enable Internet-of-Things (IoT) sensor networks. The circuit is taped out using a 0.5 μm standard CMOS process. Measurements confirm all key features of this design: (i) up to 96% voltage converting efficiency of the rectifier; (ii) a minimum of 102 s charging time to charge a 1 mF supercapacitor from 0 V to 3.3 V of the Buck-Boost converter with impedance matching method; (iii) a 0 nA to 100 μA load current range and at least 85° phase margin (PM) LDO regulator with an ultra-low quiescent current as low as 750 pA.
AB - We present an ultra-low quiescent current power management integrated circuit (IC) for interfacing with a piezoelectric (PZE) energy harvester in a self-powering wireless sensor node. The PZE harvester first transforms mechanical energy from vibration into electricity. The AC output from the PZE is then converted into DC power using a full bridge rectifier, and charges a small filter capacitor. The energy is further transferred into a supercapacitor by a Buck-Boost converter with high efficiency, using an impedance matching load to achieve maximum power point tracking (MPPT). A low-dropout (LDO) regulator powers the on-chip CMOS sensor and an external RF transmitter with the energy stored in the super capacitor, providing clean power supply, forming a complete wireless temperature sensor node, which can enable Internet-of-Things (IoT) sensor networks. The circuit is taped out using a 0.5 μm standard CMOS process. Measurements confirm all key features of this design: (i) up to 96% voltage converting efficiency of the rectifier; (ii) a minimum of 102 s charging time to charge a 1 mF supercapacitor from 0 V to 3.3 V of the Buck-Boost converter with impedance matching method; (iii) a 0 nA to 100 μA load current range and at least 85° phase margin (PM) LDO regulator with an ultra-low quiescent current as low as 750 pA.
KW - Buck-Boost converter
KW - LDO regulator
KW - impedance matching
KW - maximum power point tracking (MPPT)
KW - piezoelectric energy harvester
KW - power management system
UR - https://www.scopus.com/pages/publications/85032683965
U2 - 10.1109/ISCAS.2017.8050865
DO - 10.1109/ISCAS.2017.8050865
M3 - 会议稿件
AN - SCOPUS:85032683965
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
BT - IEEE International Symposium on Circuits and Systems
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 50th IEEE International Symposium on Circuits and Systems, ISCAS 2017
Y2 - 28 May 2017 through 31 May 2017
ER -