Title :
High efficiency power management system for solar energy harvesting applications
Author :
Chang, Ming-Hung ; Wu, Jung-Yi ; Hsieh, Wei-Chih ; Lin, Shang-Yuan ; Liang, You-Wei ; Hwang Wei
Author_Institution :
Dept. of Electron. Eng. & Inst. of Electron., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A high efficiency power management system for solar energy harvesting applications is proposed. The power management system receives power from photovoltaic (PV) cell and generate different voltage levels, they are 1V~0.3V for analog circuitry and low power digital circuitry, -1.2V for super-cutoff technique in memory circuitry, and 10V for FLASH memory or I/O components. The great voltage varieties are suitable for green integrated regulator SoC electronics. The power management system also contains a rechargeable battery which is charged by multi-phase maximum power tracking (MPT) circuitry with the PV cell module. With the MPT circuitry, the power of PV cell can be regulated in the maximum power region. The average power efficiency of the MPT circuitry is up to 80%~73%. All results are simulated in UMC 90nm bulk CMOS technology model.
Keywords :
CMOS integrated circuits; energy harvesting; maximum power point trackers; secondary cells; solar cells; system-on-chip; CMOS technology model; MPT circuitry; analog circuitry; flash memory; green integrated regulator SoC electronics; high efficiency power management system; low power digital circuitry; memory circuitry; multiphase maximum power tracking circuitry; photovoltaic cell; rechargeable battery; size 90 nm; solar energy harvesting applications; voltage -1.2 V; voltage 1 V to 0.3 V; voltage 10 V; Batteries; Capacitors; Charge pumps; Computer architecture; Microprocessors; Regulators; Voltage control;
Conference_Titel :
Circuits and Systems (APCCAS), 2010 IEEE Asia Pacific Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4244-7454-7
DOI :
10.1109/APCCAS.2010.5774960
