Browse > Article
http://dx.doi.org/10.4313/TEEM.2010.11.1.024

High Performance Current Sensing Circuit for Current-Mode DC-DC Buck Converter  

Jin, Hai-Feng (Department of Semiconductor Engineering, Chungbuk National University)
Piao, Hua-Lan (Department of Semiconductor Engineering, Chungbuk National University)
Cui, Zhi-Yuan (Department of Semiconductor Engineering, Chungbuk National University)
Kim, Nam-Soo (Department of Semiconductor Engineering, Chungbuk National University)
Publication Information
Transactions on Electrical and Electronic Materials / v.11, no.1, 2010 , pp. 24-28 More about this Journal
Abstract
A simulation study of a current-mode direct current (DC)-DC buck converter is presented in this paper. The converter, with a fully integrated power module, is implemented by using sense method metal-oxide-semiconductor field-effect transistor (MOSFET) and bipolar complementary metal-oxide-semiconductor (BiCMOS) technology. When the MOSFET is used in a current sensor, the sensed inductor current with an internal ramp signal can be used for feedback control. In addition, the BiCMOS technology is applied in the converter for an accurate current sensing and a low power consumption. The DC-DC converter is designed using the standard $0.35\;{\mu}m$ CMOS process. An off-chip LC filter is designed with an inductance of 1 mH and a capacitance of 12.5 nF. The simulation results show that the error between the sensing signal and the inductor current can be controlled to be within 3%. The characteristics of the error amplification and output ripple are much improved, as compared to converters using conventional CMOS circuits.
Keywords
Current-mode DC-DC buck converter; Sense metal-oxide-semiconductor filed-effect transistor; Bipolar complementary metal-oxide-semiconductor; Output ripple;
Citations & Related Records
연도 인용수 순위
  • Reference
1 L. Cheung Fai and P. K. T. Mok, IEEE J. Solid-State Circuits 39, 3(2004) [DOI: 10.1109/JSSC.2003.820870].   DOI   ScienceOn
2 B. J. Patella, A. Prodic, A. Zirger, and D. Maksimovic, IEEE Trans.Power Electron. 18, 438 (2003) [DOI: 10.1109/TPEL.2002.807121].   DOI   ScienceOn
3 M. Corsi, Proceedings of the 1995 Bipolar/BiCMOS Circuits and Technology Meeting (Dallas, TX, USA 1995 Oct. 2-3, IEEE Electron Devices Society) p. 55.
4 W. H. Ki, Current sensing technique using MOS transistors scaling with matched bipolar current sources. U.S. patent no. 5757174, 1998 May 26.
5 R. G. Meyer and W. D. Mack, IEEE J. Solid-State Circuits 29, 350(1994) [DOI: 10.1109/4.278360].   DOI   ScienceOn
6 A. S. Sedra and K. C. Smith, Microelectronic Circuits, 5th ed. (Oxford University Press, New York, 2004).
7 P. Midya, P. T. Krein, and M. F. Greuel, IEEE Trans. PowerElectron. 16, 522 (2001) [DOI: 10.1109/63.931070].   DOI   ScienceOn
8 W. Schultz, Lossless Current Sensing with SENSEFETs Enhances the Motor Drive (Motorola Technical Report, 1988).
9 S. Yuvarajan, Conference Record of the IEEE Industry Applications Society Annual Meeting (Seattle, WA, USA 1990 Oct. 7-12, IEEE Industry Applications Society) p. 1589.