National Chiao-Tung University

Department of Electronics Engineering & Institute of Electronics

An Efficient Power Management System for Solar Energy Harvesting Applications

Student : Tung-Hau Tsai

Advisor : Dr. Wei Hwang


The goal of the thesis is to design and implement an efficient power management system for solar energy harvesting applications. This includes the design of voltage regulator, reference voltage generator and charge pump.

The result of this study has developed following results:

  1. New voltage regulator with high current efficiency and fast load regulation is proposed.
  2. A novel connect scheme is proposed for improving power efficiency of charge pump which generates ultra high voltage. The proposed charge pump circuit can be implemented in standard CMOS process without using special mask to prevent the breakdown of CMOS.
  3. An efficient power management system for solar energy harvesting applications is proposed. The power management system works with a rechargeable battery and efficiently uses the energy of battery.
  4. The power management system accepts energy from photovoltaic cell and outputs 500mV, -500mV and 1V for computation circuitry and memory circuitry.