Simulation and Implementation of a New Single-Inductor Dual-Output Resonant Step Down/Up Converter

K. Sundararaman(1*), M. Gopalakrishnan(2), S. Ezhilarasi(3)

(1) Sri Venkateswara College of Engineering, Chennai, India
(2) Anna University, Chennai, India
(3) Anna University, Chennai, India
(*) Corresponding author


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Abstract


This paper presents a new non-isolated, single-inductor, dual-output resonant step down/up converter. The outputs are fed power from the same supply one after another. The output voltages could be more than or less than the supply voltage and both buck or boost outputs are possible. Soft switching is achieved and losses are reduced. Steady state analysis of the converter is done. The primary output is closely regulated by common-mode frequency control and the auxiliary output is controlled by differential mode PWM control. A comprehensive simulation of the converter with line and load variations is done and the results are in agreement with the analysis. Some typical hardware results are also presented as a validation. The topology is scalable to additional outputs as well.
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Keywords


DC-DC Converter; Multi-Output; Resonant Converter; Single-Inductor; Soft-Switching

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References


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