High-Efficiency Hybrid Dual-Path Step-Up DC-DC Converter with Continuous Output-Current Delivery for Low Output Voltage Ripple

Se Un Shin, Sung Wan Hong, Hyung Min Lee, Gyu Hyeong Cho

Research output: Contribution to journalArticle

Abstract

This article proposes a new boost converter topology called dual-path step-up dc-dc converter (DPUC). Unlike the conventional boost converter (CBC), the DPUC has a hybrid structure using one inductor and one flying capacitor to make dual current delivery paths. This allows continuous current delivering to the output, reducing both the dc level of the inductor current and the output voltage ripple. Therefore, the DPUC has higher efficiency and smaller output voltage ripple than those of the CBC. In addition, the feedforward characteristic of the flying capacitor can alleviate the effect of right-half-plane zero that degrades the transient response. Even with the inductor dc resistance of 200 mΩ, the DPUC achieves a high efficiency of 95.2% and a small ripple of up to 15 mV.

Original languageEnglish
Article number8903550
Pages (from-to)6025-6038
Number of pages14
JournalIEEE Transactions on Power Electronics
Volume35
Issue number6
DOIs
Publication statusPublished - 2020 Jun

Keywords

  • Boost converter
  • dc resistance (DCR)
  • dual-path step-up dc-dc converter (DPUC)
  • output delivery current
  • output voltage ripple
  • right-half-plane zero (RHP-zero)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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