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http://dx.doi.org/10.7471/ikeee.2014.18.2.220

Design of Single-Inductor Dual-Output Boost-Boost DC-DC Converter with Dual Feedback Loop Based on Relative Sawtooth Generator  

Yun, Dam (College of Information and Communication Engineering, Sungkyunkwan University)
Kim, Dong-Young (College of Information and Communication Engineering, Sungkyunkwan University)
Lee, Kang-Yoon (College of Information and Communication Engineering, Sungkyunkwan University)
Publication Information
Journal of IKEEE / v.18, no.2, 2014 , pp. 220-227 More about this Journal
Abstract
This paper presents a control method of Single-Inductor Dual-Output DC-DC Converter using Common mode feedback and differential feedback loops. To generate duty used for differential mode feedback loop, this paper propose relative sawtooth circuit using current divider circuit which makes ramp signal with variable dead-time. Two outputs of the Single-Inductor Dual-Output DC-DC Converter are specified for 2.8 V and 4.2 V with input voltage 2.5 V. The maximum conversion efficiency of designed SIDO DC-DC Converter is 95% at total output power of 539mW. Cross regulations of Boost1 and Boost2 are 3.57% and 4% each, when increasing twice times output current.
Keywords
DC-DC Converter; Control; Single-Inductor Dual-Output; PWM; Cross Regulation;
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  • Reference
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