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

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Abstract

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.

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References

  1. Zinov’ev, G.S., Lopatkin, N.N., and Vais, H., Highvoltage DC-DC converter for new-generation electric locomotives, Russ. Electr. Eng., 2009, vol. 80, no. 12, pp. 685–690.

    Article  Google Scholar 

  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., 2008, vol. 23, no. 2, pp. 771–781.

    Article  Google Scholar 

  3. Zhou, S. and 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, 2006, vol. 53, no. 4, pp. 319–323.

    Google Scholar 

  4. Huang, M.H. and 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, 2009, vol. 44, no. 4, pp. 1099–1111.

    Article  Google Scholar 

  5. Yan, W., Li, W., and Liu, R., A noise-shaped buck DCDC converter with improved light-load efficiency and fast transient response, IEEE Trans. Power Electron., 2011, vol. 26, no. 12, pp. 3908–3924.

    Article  Google Scholar 

  6. Siu, M., Mok, P.K.T., Leung, K.N., Lam, Y.H., and Ki, W.H., A voltage-mode PWM buck regulator with end-point prediction, IEEE Trans. Circuit Syst. II: Exp. Briefs, 2006, vol. 53, no. 4, pp. 294–298.

    Article  Google Scholar 

  7. Chae, C.S., Le, H.P., Lee, K.C., and 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, 2009, vol. 44, no. 2, pp. 509–534.

    Article  Google Scholar 

  8. Seol, K.S., Woo, Y.J., Cho, G.H., and Gho, G.H., Synchronous multi-output step-up/down DC-DC converter with return current control, IEEE Trans. Circuits Syst. II: Expr. Briefs, 2009, vol. 56, no. 3, pp. 210–214.

    Article  Google Scholar 

  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, Guiyang, 2005, vol. 2, pp. 2–554.

    Google Scholar 

  10. Zotov, L.G., Capacitor step-up DCconverter with variable structure for self-contained power systems, Russ. Electr. Eng., 2011, vol. 82, no. 4, pp. 216–220.

    Article  Google Scholar 

  11. Mai, Y.Y. and Mok, P.K.T., A constant frequency output- ripple-voltage-based buck converter without using large ESR capacitor, IEEE Trans. Circuits Syst. II: Expr. Briefs, 2008, vol. 55, no. 8, pp. 748–752.

    Article  Google Scholar 

  12. Wu, P.Y. and Mok, P.K.T., A monolithic buck converter with near-optimum reference tracking response using adaptive-output-feedback, IEEE J. Solid-State Circuits, 2007, vol. 42, no. 11, pp. 2441–2450.

    Article  Google Scholar 

  13. Ferris, T.A. and Agness, J.R., U.S. Patent 8,145,934, 27.03.2012.

  14. Marques, A., U.S. Patent 5,177,408, 5.01.1993.

  15. Bing, Y., Xinquan, L., Qiang, Y., et al., A novel compact soft-start circuit with internal circuitry for DC-DC converters, Proc. 7th IEEE Int. Conf. ASIC. ASICON’07, Guilin, 2007, pp. 450–453.

    Google Scholar 

  16. Cheng, J., Ma, Z., and Zhang, H., A voltage mode buck DC-DC converter with automatic PWM/PSM mode switching by detecting the transient inductor current, Analog Integrated Circuits Signal Processing, 2014, vol. 80, no. 2, pp. 243–253.

    Article  Google Scholar 

  17. Liu, P.J., Hsu, C.Y., and Chang, Y.H., Techniques of dual-path error amplifier and capacitor multiplier for on-chip compensation and soft-start function, IEEE Trans. Power Electron., 2014, vol. 30, no. 3, pp. 1403–1410.

    Article  Google Scholar 

  18. Xu, S., Yao, Y., Kan, M., et al., Transient response optimization for peak current mode buck converter in the application of dynamic voltage scaling, J. Power Electron. IET, 2014, vol. 7, no. 3, pp. 705–712.

    Article  Google Scholar 

  19. Chen, W.C., Ming, D.L., Su, Y.P., et al., A wide load range and high efficiency switched-capacitor DC-DC converter with pseudo-clock controlled load-dependent frequency, IEEE Trans. Circuits Syst. Regular Pap., 2014, vol. 61, no. 3, pp. 911–921.

    Article  Google Scholar 

  20. Le, H.P., Chae, C.S., Lee, K.C., et al., A single-inductor switching DC-DC converter with five outputs and ordered power-distributive control, IEEE J. Solid-State Circuits, 2007, vol. 42, no. 12, pp. 2706–2714.

    Article  Google Scholar 

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Authors and Affiliations

  1. College of Tourism and Environment Science, Shaanxi Normal University, Xi’an, 710119, China

    X. H. Wang

  2. Leisure Management College, Xi’an Eurasia University, Xi’an, 710065, China

    X. H. Wang

  3. School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an, 710121, China

    L. Tian

Authors
  1. X. H. Wang
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  2. L. Tian
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Correspondence to L. Tian.

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Wang, X.H., Tian, L. A digital soft-start circuit for buck DC-DC converter. Russ. Electr. Engin. 88, 91–97 (2017). https://doi.org/10.3103/S1068371217020109

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  • DOI: https://doi.org/10.3103/S1068371217020109

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