Power-tracking embedded buck-boost converter with fast dynamic voltage scaling for the SoC system

Yu Huei Lee*, Shao Chang Huang, Shih Wei Wang, Wei Chan Wu, Ping Ching Huang, Hsin Hsin Ho, Yuan Tai Lai, Ke-Horng Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

A power-tracking embedded buck-boost converter with a fast dynamic voltage scaling (F-DVS) function is proposed to power the system-on-a-chip (SoC) system. To meet the power request of the SoC for different operation functions, fast up/down-tracking is implemented to achieve the F-DVS function. Recycling energy is also derived to minimize power dissipation during the down-tracking period. In addition, the peak current control and valley current control methods are utilized in the buck and boost operations, respectively, to minimize the effect of switching noise in high switching operation for compact solution. Moreover, the self-tuning pulse skipping mechanism extends the effective duty cycle to achieve voltage regulation and improves efficiency when the input voltage is close to that of the output. Through F-DVS, the tracking speed from 3 to 2 V and vice versa are 15 and 20 s, respectively, with a high switching frequency of 5 MHz.

Original languageEnglish
Article number5672606
Pages (from-to)1271-1282
Number of pages12
JournalIEEE Transactions on Power Electronics
Volume27
Issue number3
DOIs
StatePublished - 20 Feb 2012

Keywords

  • Buck-boost (BB) converter
  • dc-dc converter
  • dynamic voltage scaling (DVS)
  • peak current control (PCC)
  • power tracking
  • pulse skipping
  • system-on-a-chip (SoC)
  • valley current control (VCC)

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