Abstract This paper proposes a current-mode control technique of single-inductor dual-output (SIDO) switching converter. Taking SIDO Boost converter in continuous conduction mode (CCM) as an example, its working principle, operation sequence and stability are analyzed, and then the steady-state working condition is obtained. By establishing the time-domain simulation of current-mode controlled CCM SIDO Boost converter, the steady-state performance, transient performance, output cross- regulation and stability are analyzed respectively. It is found that, compared to the traditional common-mode and difference-mode voltage-mode controlled SIDO Boost converter, current-mode controlled SIDO Boost converter has improved transient response and reduced output cross-regulation. The instability can be eliminated by using slope compensation. Finally, the validity of the theoretical analysis is proved by hardware experiment.
[1] Zheng Y Q, Ho M, Guo J P, et al.A single-inductor multiple-output auto-Buck-Boost DC-DC converter with autophase allocation[J]. IEEE Transactions on Power Electronics, 2016, 31(3): 2296-2313. [2] Wai R J, Jheng K H.High efficiency single-input multiple-output DC-DC converter[J]. IEEE Transa- ctions on Power Electronics, 2013, 28(2): 886-898. [3] 陈乾宏, 阮新波, 严仰光. 多路输出电源中耦合电感的模型及分析[J]. 电工技术学报, 2001, 16(5): 40-45. Chen Qianhong, Ruan Xinbo, Yan Yangguang.Model and analysis of the coupled inductor in multi-output converter[J]. Transactions of China Electrotechnical Society, 2001, 16(5): 40-45. [4] 周述晗, 周国华, 陈兴. 升压型单电感双输出变换器输出低电压的理论分析与实验验证[J]. 电工技术学报, 2014, 19(增刊1): 218-225. Zhou Shuhan, Zhou Guohua, Chen Xing.Theoretical analysis and experimental verification of single- inductor dual-output Boost converter with low voltage output[J]. Transactions of China Electrotechnical Society, 2014, 19(S1): 218-225. [5] Liu X S, Xu J P, Chen Z Y, et al.Single-inductor dual-output Buck-Boost power factor correction con- verter[J]. IEEE Transactions on Industrial Electronics, 2015, 62(2): 943-952. [6] 何莹莹. 伪连续导电模式单电感双输出反激变换器[D]. 成都: 西南交通大学, 2014. [7] Le H P, Chea C S, Lee K C, et al.A single-inductor switching with 5 outputs DC-DC converter and ordered power-distributive control[C]//IEEE Inter- national Solid-State Circuits Conference, San Francisco, USA, 2007: 534-535. [8] Patra P, Ghosh J, Patra A.Control scheme for reduced cross-regulation in single-inductor multiple- output DC-DC converters[J]. IEEE Transactions on Industrial Electronics, 2013, 60(11): 5095-5104. [9] Dasika J D, Bahrani B, Saeedifard M, et al.Multivariable control of single-inductor dual-output Buck converters[J]. IEEE Transactions on Power Electronics, 2014, 29(4): 2061-2070. [10] 刘雪山, 许建平, 秦明, 等. 电流型脉冲序列控制单电感双输出Buck变换器[J]. 电工技术学报, 2012, 27(1): 155-161. Liu Xueshan, Xu Jianping, Qin Ming, et al.Single- inductor dual-output Buck converter with current mode pulse-train control[J]. Transactions of China Electrotechnical Society, 2012, 27(1): 155-161. [11] Lin K Y, Huang C S, Chen D, et al.Modeling and design of feedback loops for a voltage-mode single- inductor dual-output Buck converter[C]//IEEE Power Electronics Specialists Conference, Rhodes, Greek, 2008: 3389-3395. [12] Trevisan D, Mattavelli P, Tenti P.Digital control of single-inductor multiple-output step-down DC-DC converters in CCM[J]. IEEE Transactions on Indu- strial Electronics, 2008, 55(9): 3476-3483. [13] Deisch C W.Simple switching control method changes power converter into a current source[C]// IEEE Power Electronics Specialists Conference, New York, USA, 1978: 300-306. [14] 周国华, 许建平. 开关变换器调制与控制综述[J]. 中国电机工程学报, 2014, 34(6): 815-831. Zhou Guohua, Xu Jianping.A review of modulation and control techniques for switching converters[J]. Proceedings of the CSEE, 2014, 34(6): 815-831. [15] Mitchell D M.An analytical investigation of current injected control for constant-frequency switching regulators[J]. IEEE Transactions on Power Elec- tronics, 1986, 1(3): 167-174. [16] Middlebrook R D.Topics in multiple-loop regulators and current-mode programming[J]. IEEE Transa- ctions on Power Electronics, 1987, 2(2): 109-124. [17] Tang W, Lee F C, Ridley R B.Small-signal modeling of average current-mode control[J]. IEEE Transa- ctions on Power Electronics, 1993, 8(2): 112-119. [18] 卢伟国, 栗安鑫, 周雒维, 等. 零扰动补偿控制电流模式Buck变换器[J]. 电工技术学报, 2014, 29(8): 90-96. Lu Weiguo, Li Anxin, Zhou Luowei, et al.Zero- perturbation compensation control of current-mode Buck converter[J]. Transactions of China Electro- technical Society, 2014, 29(8): 90-96.
2018, Vol. 33 
