A Single-Inductor Triple-Output Converter with an Automatic Detection of DC or AC Energy Harvesting Source for Supplying 93% Efficiency and 0.05mV/mA Cross Regulation to Wearable Electronics

Abstract

the proposed single-inductor triple-output (SITO) converter can accept both DC battery voltage and AC energy harvesting voltage to provide a triple step up and down outputs. Storing the energy to the H-bridge capacitor first and pumping it later can ensure a continuous inductor current for reducing the output voltage ripple by 67%. Due to the H-bridge, the inductor current value is reduced to 1/5X to achieve high efficiency of 93% under the current loading of 120mA. Moreover, the proposed PWM and the adaptive on-time hybrid controller uses different modulation methods in a single controller to meet the requirements of different multiple outputs.