Stability Considerations of Hysteretic Controlled DC-DC Converters

Conference: PRIME 2012 - 8th Conference on Ph.D. Research in Microelectronics & Electronics
06/12/2012 - 06/15/2012 at Aachen, Germany

Proceedings: PRIME 2012

Pages: 4Language: englishTyp: PDF

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Dietrich, Stefan; Wunderlich, Ralf; Heinen, Stefan (Chair of Integrated Analog Circuits & RF Systems, RWTH Aachen University, Aachen, Germany)

Hysteretic control for integrated switching-mode DC-DC converters has recently gained higher importance due to the simplicity of its design and robustness of its large-signal stability. Still, small-signal stability of the converter in steady- state using classical linearization is not reasonable. This paper focuses on the stability considerations of hysteretic controlled DC- DC converters using sliding-mode control in the phase plane. Mathematic criteria are derived, which prove the well-known inherent stability of hysteretic controlled DC-DC converters.