Small-Signal Modeling and Loop Analysis of Ultrafast Series Capacitor Trans-Inductor Voltage Regulator With Constant On-Time Control

被引：2

作者：

Li, Chenxi ^{[1
,2
]}

Wang, Liang ^{[1
,2
]}

Zheng, Guangce ^{[1
,2
]}

Fu, Minfan ^{[1
,2
]}

Wang, Haoyu ^{[1
,2
]}

机构：

[1] ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China

[2] Shanghai Engn Res Ctr Energy Efficient & Custom AI, Shanghai 201210, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2025年 / 40卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Capacitors; Inductors; Analytical models; Load modeling; Switches; Voltage control; Steady-state; Couplings; Computational modeling; Buck converters; Constant on-time (COT); describing function (DF); series capacitor (SC); small-signal model; trans-inductor voltage regulator; STABILITY ANALYSIS; GENERAL-APPROACH; BUCK CONVERTER; DESIGN; RAMP;

D O I：

10.1109/TPEL.2024.3488734

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this article, a comprehensive small-signal model is developed for multiphase series capacitor trans-inductor voltage regulator (SCTLVR) with current mode constant-on time (CMCOT) control. The transfer function of the power stage is thoroughly derived by decoupling the SC structure and the trans-inductor. The modeling of the CMCOT modulator is conducted using the describing function (DF) method, known for its high accuracy, particularly in the high-frequency domain. This method ensures precise prediction and analysis of the dynamic response. To address the demands of ultra-high current applications, the model is extended to accommodate multiple modules, allowing for a detailed closed-loop analysis. Validation through SIMPLIS simulations and experimental results demonstrates the model's accuracy and reliability. The established model provides qualitative guidance on optimally designing the SCTLVR controller under various operating conditions.

引用

页码：3262 / 3274

页数：13