A High Step-Down Dual Output Nonisolated DC/DC Converter with Decoupled Control

Ayan Mallik, Alireza Khaligh

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


This paper presents a dc/dc buck-boost converter topology with high-voltage gain and dual outputs. Unlike many of the high step-down/step-up dc/dc converters, this topology uses a relatively ower number of LC components and three active semiconductor devices switched in a nonoverlapping way. Due to the duty cycle limitation, high gain (typically more than 4) is very difficult to achieve in a single-stage regular buck-boost dc/dc converter. In the proposed converter, the overall gains at both the output ports are nonlinear functions of duty-cycles of the power devices, which help achieve an overall step-down/step-up gain of 10-15. An experimental prototype converting 48 V dc to ±5 V dc at 100 W with closed loop control is developed in order to verify the operation and effectiveness of the proposed converter structure. An output voltage ripple of ±1% and a conversion efficiency of 94% are achieved according to the experimental results.

Original languageEnglish (US)
Article number8052166
Pages (from-to)722-731
Number of pages10
JournalIEEE Transactions on Industry Applications
Issue number1
StatePublished - Jan 1 2018
Externally publishedYes


  • Control systems
  • DC-DC power conversion
  • control engineering
  • power MOSFETS
  • power electronics

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


Dive into the research topics of 'A High Step-Down Dual Output Nonisolated DC/DC Converter with Decoupled Control'. Together they form a unique fingerprint.

Cite this