A digital soft-start circuit for buck DC-DC converter

被引：5
作者：
Wang X.H. [1 ,2 ]
Tian L. [3 ]
机构：
[1] College of Tourism and Environment Science, Shaanxi Normal University, Xi’an
[2] Leisure Management College, Xi’an Eurasia University, Xi’an
[3] School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an
来源：
Russian Electrical Engineering | 2017年 / 88卷 / 2期
关键词：
DC-DC converter; overshoot voltage; rush current; soft-start;
D O I：
10.3103/S1068371217020109
中图分类号：
学科分类号：
摘要：
In this paper, a soft-start circuit is present to prevent the large surge current and overshoot voltage to improve the reliability of the DC-DC converter. The proposed structure generates the step-shaped soft-start voltage through 7 bits DAC. Combining with the PWM comparator, the soft-start circuit controls the system duty cycle directly. The mechanism of the soft-start acts as the high clamp function, which eliminates the need of the clamp circuit. A DC-DC buck converter with the proposed soft-start circuit is based on a 0.4 μm BCD process for verification Hspice simulation shows that under the condition with 3.6 V input voltage, 1.8 V output voltage and 600 mA load current, the soft-start is achieved. After 1.2 ms of the soft-start time, the operation turns to stable. © 2017, Allerton Press, Inc.
引用
收藏
页码：91 / 97
页数：6
相关论文
共 20 条
  • [1] Zinov'ev G.S., Lopatkin N.N., Vais H., Highvoltage DC-DC converter for new-generation electric locomotives, Russ. Electr. Eng., 80, 12, pp. 685-690, (2009)
  • [2] Tao H., Kotsopoulos A., Duarte J.L., Et al., Transformer- coupled multiport ZVS bidirectional DC-DC converter with wide input range, IEEE Trans. Power Electron., 23, 2, pp. 771-781, (2008)
  • [3] Zhou S., Rincon-Mora G.A., A high efficiency, soft switching dc-dc converter with adaptive currentripple control for portable applications, IEEE Trans. Circuit Syst. II, Exp. Briefs, 53, 4, pp. 319-323, (2006)
  • [4] Huang M.H., Chen K.H., Single-inductor multioutput (SIMO) DC-DC converters with high lightload efficiency and minimized cross-regulation for portable devices, IEEE J. Solid-State Circuits, 44, 4, pp. 1099-1111, (2009)
  • [5] Yan W., Li W., Liu R., A noise-shaped buck DCDC converter with improved light-load efficiency and fast transient response, IEEE Trans. Power Electron., 26, 12, pp. 3908-3924, (2011)
  • [6] Siu M., Mok P.K.T., Leung K.N., Lam Y.H., Ki W.H., A voltage-mode PWM buck regulator with end-point prediction, IEEE Trans. Circuit Syst. II: Exp. Briefs, 53, 4, pp. 294-298, (2006)
  • [7] Chae C.S., Le H.P., Lee K.C., Cho G.H., A single-inductor step-up DC-DC switching converter with bipolar outputs for active matrix OLED mobile display panels, IEEE J. Solid-State Circuits, 44, 2, pp. 509-534, (2009)
  • [8] Seol K.S., Woo Y.J., Cho G.H., Gho G.H., Synchronous multi-output step-up/down DC-DC converter with return current control, IEEE Trans. Circuits Syst. II: Expr. Briefs, 56, 3, pp. 210-214, (2009)
  • [9] Xinquan L., Jianping G., Weixue Y., Et al., A novel digital soft-start circuit for DC-DC switching regulator, Proc. 6th IEEE Int. Conf. ASIC. ASICON 2005, 2, pp. 2-554, (2005)
  • [10] Zotov L.G., Capacitor step-up DCconverter with variable structure for self-contained power systems, Russ. Electr. Eng., 82, 4, pp. 216-220, (2011)
12