Accurate Dead-Time Control for Synchronous Buck Converter With Fast Error Sensing Circuits

Author

Sungwoo Lee ; Seungchul Jung ; Changbyung Park ; Chun-Taek Rim ; Gyu-Hyeong Cho

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea

Volume

60

Issue

11

fYear

2013

fDate

Nov. 2013

Firstpage

3080

Lastpage

3089

Abstract

Dead-time controls for synchronous buck converter are challenging due to the difficulties in accurate sensing and processing the on/off dead-time errors. For the control of dead-times, an integral feedback control using switched capacitors and a fast timing sensing circuit composed of MOSFET differential amplifiers and switched current sources are proposed. Experiments for a 3.3 V input, 1.5 V-0.3 A output converter demonstrated 1.3 ~ 4.6% efficiency improvement over a wide load current range.

Keywords

MOSFET; constant current sources; differential amplifiers; power convertors; switched capacitor networks; MOSFET differential amplifiers; accurate dead-time control; current 0.3 A; fast error sensing circuits; fast timing sensing circuit; integral feedback control; on-off dead-time errors; switched capacitors; switched current sources; synchronous buck converter; voltage 1.5 V; voltage 3.3 V; Dead-time control; integral feedback control; switched capacitors; synchronous buck converter;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2013.2252451

Filename

6492138