【摘 要】
：
设计了一种应用于DC-DC变换器中的斜坡补偿电路.提出了一种新的动态斜坡补偿方法,使斜坡补偿电流的斜率随着占空比的增大而增大,在消除了次谐波振荡的同时,也避免了斜坡补偿
【机 构】
：
河北新华北集成电路有限公司,石家庄 050200;中国电子科技集团公司第十三研究所,石家庄 050051;河北省移动通信用射频集成电路重点实验室,石家庄 050200;河北新华北集成电路有限公司,石家
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设计了一种应用于DC-DC变换器中的斜坡补偿电路.提出了一种新的动态斜坡补偿方法,使斜坡补偿电流的斜率随着占空比的增大而增大,在消除了次谐波振荡的同时,也避免了斜坡补偿对DC-DC变换器带载能力的影响.该斜坡补偿电路结构简单,易于实现,已在基于0.5 μm双极型CMOS DMOS(BCD)工艺设计的电流模降压型DC-DC变换器中得到了验证.测试结果表明,该DC-DC变换器在不同占空比下可稳定工作,可以满足一般的电源应用需求.设计的DC-DC变换器面积为2.2 mm×2.2 mm,其中斜坡补偿电路面积仅为0.2 mm×0.3 mm.
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