Digitally controlled switching converter with automatic multimode switching

Chien Hung Tsai, Chun Hung Yang, Jiunn Hung Shiau, Bo Ting Yeh

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


This paper presents a multimode digital controller with dead-time self-exploration (DTSE) for synchronous buck converters that simultaneously achieves high efficiency and a fast transient response. The automatic mode switching technique uses the duty-cycle command to determine multimode operation without sensing any current signals. The DTSE algorithm is used to minimize the steady-state duty-cycle command to maximize the converter efficiency. During load transients, a nonlinear control mode is employed to reduce the transient response. The proposed digital controller is fabricated in a CMOS 0.18-μm process. The experimental results for a 1.2-V output voltage show that the measured power efficiency is higher than 85% for a load range of 10-600 mA and that the measured transient response is improved by 28% compared to that of the traditional voltage-mode converter.

Original languageEnglish
Article number6522185
Pages (from-to)1830-1839
Number of pages10
JournalIEEE Transactions on Power Electronics
Issue number4
Publication statusPublished - 2014

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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