Browse > Article
http://dx.doi.org/10.7840/kics.2015.40.9.1693

Design of PFM Boost Converter with Dual Pulse Width Control  

Choi, Ji-San (Inha University Department of Electronic Engineering)
Jo, Yong-Min (Inha University Department of Electronic Engineering)
Lee, Tae-Heon (Inha University Department of Electronic Engineering)
Yoon, Kwang-Sub (Inha University Department of Electronic Engineering)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.40, no.9, 2015 , pp. 1693-1698 More about this Journal
Abstract
This paper proposed a PFM(pulse-frequency modulator) boost converter which has dual pulse-width. The PFM boost converter is composed of BGR(band gap voltage reference generating circuit), voltage reference generating circuit, soft-start circuit, error amplifier, high-speed comparator, inductor current sensing circuit and pulse-width generator. Converter has different inductor peak current so it has wider load current range and smaller output voltage ripple. Proposed PFM boost converter generates 18V output voltage with input voltage of 3.7V and it has load current range of 0.1~300mA. Simulation results show 0.43% output voltage ripple at ligh load mode and 0.79% output voltage ripple at heavy load mode. Converter has efficiency 85% at light lode mode and it has maximum 86.4% at 20mA load current.
Keywords
PFM; Boost Converter; Pulse-width; DC-DC Converter;
Citations & Related Records
연도 인용수 순위
  • Reference
1 E. Sanchez-Sinencio and A. G. Andreou, "Low-voltage/ low-power integrated circuits and systems," IEEE PRESS, 1998.
2 U. Sengupta, "PWM and PFM operation of DC/DC converters for portable applications," TI Power Supply Design Seminar, vol. 1700, 2007.
3 X. Liu, S. Guo, S. Wang, F. Xu, G. Du, and Y. Chang, "Analysis and design of a high efficiency boost DC-DC converter based on pulse-frequency modulation," Int. Symp. Integrated Circuits, pp. 398-401, Singapore, 2007.
4 M. Al-Shyoukh and H. Lee, "A compact fully-integrated extremum-selector-based softstart circuit for voltage regulators in bulk CMOS technologies," IEEE Trans. Circuits Syst. II: Express Briefs, vol. 57, no. 10, pp. 818-822, 2010.   DOI
5 K. Lee, "Design of high dimming ratio power-LED driver with preloading inductor current method," M.S. Thesis, Inha Univerity Graduate school, pp. 45-46, 2013.
6 Y.-S. Kim, B.-M. No, J.-S. Min, S. Al-Sarawi, and D. Abbott, "On-chip current sensing circuit for current-limited minimum off-time PFM boost converter," SoC Design Conf. (ISOCC), pp. 544-547, Busan, Korea, Nov. 2009.
7 R. C.-H. Chang, H.-M. Chen, C.-H. Chia, and P.-S. Lei, "An exact current-mode PFM boost converter with dynamic stored energy technique," IEEE Trans. Power Electron., vol. 24, no. 4, pp. 1129-1134, Feb. 2009.   DOI   ScienceOn
8 H.-H. Wu, C.-L. Wei, Y.-C. Hsu, and R. B. Darling, "Adaptive peak inductor current controlled PFM boost converter with a near-threshold startup voltage and high efficiency" IEEE Trans. Power Electron., vol. 30, no. 4, pp. 1956-1965, May 2014.   DOI