Topology Analysis and Modeling Comparison of SI-SIMO Boost Converter Used in Multiple Output Applications

Yilin Yan, Honghong Wang, Ping Ma () and Jianquan Liao ()
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Yilin Yan: College of Electrical Engineering, Qingdao University, Qingdao 266071, China
Honghong Wang: College of Electrical Engineering, Qingdao University, Qingdao 266071, China
Ping Ma: College of Electrical Engineering, Qingdao University, Qingdao 266071, China
Jianquan Liao: College of Electrical Engineering, Sichuan University, Chengdu 610065, China

Energies, 2025, vol. 18, issue 13, 1-21

Abstract: This paper presents the analysis and modeling of a single-input, single-inductor, multiple-output (SI-SIMO) boost converter to address limitations of conventional SISO converters in distributed power supply applications. Based on switching-state analysis, a sequential PWM modulation strategy is proposed to achieve independent voltage regulation across multiple outputs using a single inductor. An average circuit model is developed considering steady-state characteristics. Inductor conduction mode boundaries and the critical inductor value are derived. A complete modeling process is introduced, transitioning from nonlinear dynamics to small-signal approximation at the steady-state operating point. PSIM and MATLAB Simulink experiment results validate the proposed control method and confirm the theoretical analysis under various operating conditions.

Keywords: SI-SIMO; boost; PWM; switching-state; modeling; CCM/DCM (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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