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Feasibility of time-delay based frequency-control of a sliding-mode buck converter.
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| Author(s) |
Benoît LABBE, Bruno ALLARD, David CHESNEAU |
| Abstract |
The step-down switch-mode DC/DC power supply is commonly used in power management of integratedcircuits such as high performances processors and high speed memories. Sliding-mode-controlappears to be one of the best way to control step-down switch-mode converter due to stringent transientperformances required by next generation processor cores used in Smart-phones or Tablets. Howeversliding-mode’s free-running frequency has to be controlled due to electromagnetic compatibility issues.This paper presents a time-delay based frequency control analysis of a sliding-mode controlled buckconverter. Lower and upper bounds of the synchronization domain are discussed and a frequency loopstability analysis is presented. The original contribution is the circuit implementing a synchronizationsolution. Transistor level simulations corroborate theoretical results. An integrated test-chip is underfabrication using CMOS 130nm process by ST. |
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| Filename: | 0196-epe2011-full-14062152.pdf |
| Filesize: | 499.1 KB |
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| Type |
Members Only |
| Date |
Last modified 2012-01-26 by System |
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