A SELF-POWERED POWER MANAGEMENT IC FOR PIEZOELECTRIC ENERGY HARVESTING

• Main Authors: Yi-jie Luo, 羅義傑
• Other Authors: Shu-chuan Huang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/13289283431004257302

碩士 === 大同大學 === 電機工程學系(所) === 104 === In this thesis, a self-powered power management IC for piezoelectric energy harvesting is proposed. This design includes rectifier, DC-DC boost converter, logic controller and low-dropout linear regulator (LDO). Due to the alternate current of the piezoelectric material and the ambient vibration, a low dropout CMOS rectifier is designed. A DC-DC boost converter is designed to raise the output voltage for the load, and an LDO regulator provides a stable output. The energy harvesting circuit was simulated using TSMC 0.18μm CMOS process model with the minimum 0.45V piezoelectric voltage. The whole chip is powered by the piezoelectric energy without external power supply. The boost converter uses an external 100μH inductor, and quiescent power dissipation is 25μW. The logic controller is operated, when the voltage is reached to 0.6V. The maximum efficiency of the CMOS rectifier is 79.88%. When the minimum input voltage is 0.35V, the efficiency is 64.85%. The overall layout area is 1080μm×1080μm.