Supply Modes and Output Ripple Voltage of Single-Inductor Dual-Output Buck Converter
Xie Feng1, Huang Jinfeng1,2
1. School of Electrical Engineering Shaanxi University of Technology Hanzhong 723001 China; 2. Shaanxi Key Laboratory of Industrial Automation Hanzhong 723001 China
Abstract：The supply mode of the single-inductor dual-output (SIDO) Buck converter becomes complicates due to the presence of post-stage switch. In order to provide correct theoretical guidance for the analysis and design of SIDO Buck converter, this paper deeply analyzes the supply mode of SIDO Buck converter. It is found that there are two supply modes when the converter works in continuous conduction mode (CCM): complete inductor supply mode (CISM) and incomplete inductor supply mode (IISM). Moreover, when the converter works in discontinuous conduction mode (DCM), there are also two supply modes: dual-branch supply mode (DSM) and single-branch supply mode (SSM). The critical inductance of each supply mode is obtained, and the output ripple voltage (ORV) expression of each supply mode is derived. The relations of inductance with supply mode and ORV are summarized. It is pointed that there is a cross-regulation between the ORV of the two branches when the converter works in CCM. The correctness of theoretical is verified by simulation and experimental results.
[1] 肖龙, 伍梁, 李新, 等. 高频LLC变换器平面磁集成矩阵变压器的优化设计[J]. 电工技术学报, 2020, 35(4): 758-766. Xiao Long, Wu Liang, Li Xin, et al.Optimal design of planar magnetic integrated matrix transformer for high frequency LLC converter[J]. Transaction of China Electrotechnical Society, 2020, 35(4): 758-766. [2] Mojtaba Forouzesh, Shen Yanfeng, Keyvan Yari, et al.High-efficiency high step-up DC-DC converter with dual coupled inductors for grid-connected photovoltaic systems[J]. IEEE Transactions on Power Electronics, 2018, 33(7): 5967-5982. [3] 王萍, 陈博, 王议锋, 等. 一种多谐振隔离双向DC-DC变换器[J]. 电工技术学报, 2019, 34(8): 1667-1676. Wang Ping, Chen Bo, Wang Yifeng, et al.A multi resonant bidirectional DC-DC converter[J]. Transaction of China Electrotechnical Society, 2019, 34(8): 1667-1676. [4] Tian Jie, Mao Chengxiong, Wang Dan, et al.A shorttime transition and cost saving redundancy scheme for medium-voltage three-phase cascaded h-bridge electronic power transformer[J]. IEEE Transactions on Power Electronics, 2018, 33(11): 9242-9252. [5] 冉祥, 周国华, 周述晗. 共模-差模电压型控制连续导电模式单电感双输出Boost变换器交叉影响特性分析[J]. 电工技术学报, 2019, 34(12): 2519-2528. Ran Xiang, Zhou Guohua, Zhou Shuhan.Crossregulation characteristic of continuous conduction mode single-inductor dual-output Boost converter with common-mode voltage and differential-mode voltage control[J]. Transaction of China Electrotechnical Society, 2019, 34(12): 2519-2528. [6] 刘雪山, 许建平, 王楠, 等. 断续模式单电感双输出Buck功率因数校正变换器[J]. 电工技术学报, 2015, 30(22): 62-70. Liu Xueshan, Xu Jianping, Wang Nan, et al.Singleinductor dual output Buck power factor correction converter operating in discontinuous conduction mode[J]. Transaction of China Electrotechnical Society, 2015, 30(22): 62-70. [7] Jing Xiaocheng, Philip K T Mok, Ming Chak Lee. A wide-load-range constant-charge-auto-hopping control single-inductor-dual-output Boost regulator with minimized cross-regulation[J]. IEEE Journal of SolidState Circuits, 2011, 46(10): 2350-2362. [8] Zheng Yanqi, Ho Marco, Guo Jianping, et al.A single-inductor multiple-output auto-Buck-Boost DCDC converter with tail-current control[J]. IEEE Transactions on Power Electronics, 2016, 31(11): 7857-7875. [9] Wang Yao, Xu Jianping, Yin Gang.Cross-regulation suppression and stability analysis of capacitor current ripple controlled SIDO CCM Buck converter[J]. IEEE Transactions on Industrial Electronics, 2019, 66(3): 1770-1780. [10] Jaya Deepti Dasika, Behrooz Bahrani, Maryam Saeedifard, et al.Multivariable control of singleinductor dual-output Buck converters[J]. IEEE Transactions on Power Electronics, 2014, 29(4): 2061-2070. [11] 王瑶. 基于状态空间平均模型的电压控制SIDO Buck变换器稳定性分析[J]. 中国电机工程学报, 2018, 38(6): 1810-1817. Wang Yao.Stability analysis for voltage controlled single-inductor dual-output Buck converter based on state space average model[J]. Proceedings of the CSEE, 2018, 38(6): 1810-1817. [12] Chun-Shih Huang, Dan Chen, Ching-Jan Chen, et al.Mix-voltage conversion for single-inductor dualoutput Buck converters[J]. IEEE Transactions on Power Electronics, 2010, 25(8): 2106-2114. [13] 杨玉岗, 祁鳞, 吴建鸿. 三相交错并联磁集成Boost变换器的内部本质安全特性[J]. 电工技术学报, 2014, 29(4): 54-62. Yang Yugang, Qi Lin, Wu Jianhong.Analysis of inner-intrinsic safety for three-phase interleaving magnetic integrated Boost converter[J]. Transaction of China Electrotechnical Society, 2014, 29(4): 54-62. [14] 刘树林, 曹剑, 胡传义, 等. 正-反激组合变换器的能量传输模式及输出纹波电压分析[J]. 电工技术学报, 2019, 34(8): 1647-1656. Liu Shulin, Cao Jian, Hu Chuanyi, et al.Energy transmission modes and output ripple voltage of forward-flyback converter[J]. Transaction of China Electrotechnical Society, 2019, 34(8): 1647-1656. [15] Liu Shulin, Liu Jian, Mao Hong, et al.Analysis of operating modes and output voltage ripple of Boost DC-DC converters and its design considerations[J]. IEEE Transactions on Power Electronics, 2008, 23(4): 1813-1821. [16] 刘树林, 刘健. 开关变换器分析与设计[M]. 北京: 机械工业出版社, 2010. [17] 曾绍桓, 周国华, 周述晗, 等. 电流型控制三态Boost变换器的小信号建模与负载瞬态特性分析[J]. 电工技术学报, 2019, 34(7): 1468-1477. Zeng Shaohuan, Zhou Guohua, Zhou Shuhan, et al.Small-signal modeling and load transient characteristic analysis of current mode controlled Tri-State Boost converter[J]. Transaction of China Electrotechnical Society, 2019, 34(7): 1468-1477.
2020, Vol. 35 
