A Piecewise Linear Slope Compensation Circuit for DC-DC Converters  

一种DC-DC全区间分段线性斜坡补偿电路设计(英文)

作　　者：叶强[1] 来新泉[1] 李演明[1] 袁冰[1] 陈富吉[1] 

机构地区：[1]西安电子科技大学电路CAD所,西安710071

出　　处：《Journal of Semiconductors》2008年第2期281-287,共7页半导体学报（英文版）

基　　金：西安应用材料创新基金资助项目(批准号:XA-AM-200504)~~

摘　　要：To prevent sub-harmonic oscillation and improve the stability and load capacity of the system,a piecewise linear slope compensation circuit is designed. Compared with the traditional design, this circuit provides a compensation signal whose slope varies from different duty cycles at - 40-85℃ ,and reduces the negative effect of slope compensation on the system＇s load capacity and transient response. A current mode PWM Boost DC-DC converter employing this slope compensation circuit is implemented in a UMC 0.6μm-BCD process. The results indicate that the circuit works well and effectively,and the load capacity is increased by 20%. The chip area of the piecewise linear slope compensation circuit is 0.01mm^2 ,which consumes only 8μA quiescent current,and the efficiency ranges up to 93%.为了防止亚谐波振荡以及提高系统的稳定性和带载能力,设计了一种全区间分段线性斜坡补偿电路.与传统的设计方法相比,该电路在-40 ～85℃下提供的补偿信号在不同的占空比区间内具有不同的斜率,对三个占空比区间进行分段线性斜坡补偿,有效减小了斜坡补偿对系统带载能力、瞬态响应的负面影响,极大地改善了系统的稳定性和带载能力.采用此电路的一款电流模PWM升压型DC-DC已在UMC 0.6μm-BCD工艺线投片,测试结果证明分段线性斜坡补偿电路性能良好,带载能力提高了20 %.分段线性斜坡补偿电路芯片面积为0.01 mm2,静态电流消耗仅为8μA,芯片效率高达93 %.

关 键 词：DC-DC converter slope compensation piecewise linear duty cycle 

分 类 号：TM46[电气工程—电器]