A COT Controlled Buck Converter with Adaptive Slope Compensation

LUO Pan; ZHEN Shaowei; YI Zihao; FANG Zhou; YANG Mingyu; LUO Ping; ZHANG Bo

doi:10.13911/j.cnki.1004-3365.210066

[1] DEISCH C W. Simple switching control method changes power converter into a current source ［C］ // IEEE Power Elec Spec Conf. Syracuse, NY, USA. 1978: 300-306.

[2] REDL R, SOKAL N O. Current-mode control, five different types, used with the three basic classes of power converters: small-signal AC and large-signal DC characterization, stability requirements, and implementation of practical circuits ［C］ // IEEE Power Elec Specialists Conf. Toulouse, France. 1985: 771-785.

[3] LI J, LEE F C. New modeling approach and equivalent circuit representation for current-mode control ［J］. IEEE Trans Power Elec, 2010, 25(5):1218-1230.

[4] DANCY A P, AMIRTHARAJAH R, CHANDRAKASAN A P. High-efficiency multiple-output DC-DC conversion for low-voltage systems ［J］. IEEE Trans VLSI Syst, 2000, 8(3): 252-263.

[5] KWON D, RINCONMORA G A. Single inductor multiple output switching DC-DC converters ［J］. IEEE Trans Circ & Syst II: Expr Bri, 2009, 56(8): 614-618.

[6] SAHU B. Analysis and design of a fully-integrated current sharing scheme for multi-phase adaptive on -time modulated switching regulators ［C］ // IEEE Power Elec Spec Conf. Rhodes, Greece. 2008: 3829-3835.

[7] TIAN S, LEE F C, JIAN L, et al. A three-terminal switch model of constant on-time current mode with external ramp compensation ［J］. IEEE Trans Power Elec, 2016, 31(10): 7311-7319.

[8] YANG C C, WANG C Y, KUO T H. Current-mode converters with adjustable-slope compensating ramp ［C］ // IEEE Asia Pac Conf Circ & Syst. Singapore. 2006: 654-657.

[9] QIU Y, SUN J, XU M, et al. Bandwidth improvements for peak-current controlled voltage regulators ［J］. IEEE Trans Power Elec, 2007, 22(4): 1253-1260.

[10] BARI S, LI Q, LEE F C, et al. Variable slope external ramp to improve the transient performance in constant on-time current mode control ［C］ // IEEE Energy Conv Congr & Expo. Long Beach, CA, USA. 2016. 3259- 3265.

[11] CHENG K, LEE F C, MATTAVELLI P. Adaptive ripple-based constant on-time control with internal ramp compensations for buck converter ［C］ // IEEE Appl Power Elec Conf & Expo. Fort Worth, TX, USA. 2014: 440-446.

[12] SHIBATA K, PHAM C K. A compact adaptive slope compensation circuit for current-mode DC-DC converter ［C］ // IEEE Int Symp Circ & Syst. Paris, France. 2010: 1651-1654.

[13] YANG L, PARK J, HUANG A Q. An adaptive external ramp control of the peak current controlled buck converters for high control bandwidth and wide operation range ［C］ // 25th IEEE APEC. Palm Springs, CA, USA. 2010: 2181-2188.