Title :
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
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;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2013.2252451
