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An Integrated Sliding-Mode Buck Converter With Switching Frequency Control for Battery-Powered Applications

Abstract : Mobile applications necessitate nowadays huge digital resources. Power management of a digital systems-on-chip is based on dynamic voltage scaling. DC/DC converters used to supply the digital system-on-a-chips are facing stringent constraints with respect to load transients, line transients, and reference tracking. Hysteretic control is known as the most convenient control scheme with a fair tradeoff between transient performances, analog implementation and power consumption. Fixed-switching frequency hysteretic control has been experimented as well as full sliding-mode control. Transient performances are reduced due to latencies introduced in the switching frequency control. A new analog implementation of the sliding-mode control is presented here with switching frequency control using a particular analog phase-locked loop but preserve transient performances. The dc/dc converter is implemented in CMOS 130 nm. The switching frequency range has been voluntarily limited and excludes the possible integration of passive components. A hybrid demonstrator is presented with peak efficiency of 89% at 2-W output power.
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https://hal.archives-ouvertes.fr/hal-00811916
Contributor : Publications Ampère <>
Submitted on : Thursday, April 11, 2013 - 12:27:16 PM
Last modification on : Tuesday, April 7, 2020 - 1:59:22 AM

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Benoît Labbe, Bruno Allard, Xuefang Lin-Shi, David Chesneau. An Integrated Sliding-Mode Buck Converter With Switching Frequency Control for Battery-Powered Applications. IEEE Transactions on Power Electronics, Institute of Electrical and Electronics Engineers, 2013, 28 (9), pp.4318 - 4326. ⟨10.1109/TPEL.2012.2226754⟩. ⟨hal-00811916⟩

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