Extended Power Dynamic Range and Enhanced Power Conversion Efficiency of a Switched-Capacitor DC-DC Converter: A Tutorial
Document Type
Article
Publication Date
3-1-2024
Abstract
This tutorial brief presents a concise overview of integrated switched-capacitor (SC) DC-DC converter topologies for miniaturized energy harvesting (EH) IoT systems aiming for extended power dynamic range (PDR) and enhanced power conversion efficiency (PCE). This tutorial initiates by delving into the intricate SC conversion methodologies tailored for energy harvesting (EH) applications, including i) fine-grained conversion ratio (CR) tuning, ii) multiphase soft charging, and iii) clock frequency and amplitude scaling. Next, mathematical analysis is conducted along with an established model to correlate the prevailing dominant loss and its impact on the PCE and the PDR, aiming to provide designers with a guideline for different design parameter choices for the triode/subthreshold domain.
Keywords
DC-DC converter, energy harvesting, extended power dynamic range, reconfigurable, switched capacitor, CMOS
Divisions
sch_ecs
Funders
International Funding
Publication Title
IEEE Transactions on Circuits and Systems II-Express Briefs
Volume
71
Issue
3
Publisher
IEEE-Inst Electrical Electronics Engineers Inc
Publisher Location
445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA