A Novel Adaptive Quasi-Constant On-Time Current-Mode Buck Converter

作者：Nien Chin Fu^*; Chen Dan; Hsiao Sheng Fu; Kong Le; Chen Ching Jan; Chan Wei Hao; Lin Yen Liang

来源：IEEE Transactions on Power Electronics, 2017, 32(10): 8124-8133.

DOI：10.1109/TPEL.2016.2633760

• Buck converter
• constant on-time current-mode (COTCM)
• describing DF)
• voltage regulators (VRs)

There have been a variety of constant on-time (COT) controllers for dc power converter applications reported in recent years [1]-[5]. In this paper, a novel adaptive quasi-constant on-time current-mode control scheme is proposed and implemented in buck converters. While preserving the advantages of the conventional COT current-mode converters, this scheme allows fast transient response to step-load that is a critical requirement of a computer load with smart management. Asmall-signal model of the proposed circuit is also developed. Experimental results are also provided. This scheme is well suited for the next-generation dc converters for power management central-processor-unit devices.

• 出版日期2017-10