电流模式PWM升压DC-DC变换器斜升波发生器的设计  

Design of Ramp-Wave Generator in Peak Current Controlled PWM DC-DC Converter

作　　者：王瑾[1] 李攀[1] 王进军[1] 刘宁[1] 张强[1] 

机构地区：[1]西北大学信息科学与技术学院,陕西西安710127

出　　处：《现代电子技术》2007年第17期167-169,176,共4页Modern Electronics Technique

基　　金：西安-美国应用材料创新基金资助项目(ZX05097-XA-AM-200514)

摘　　要：简要分析了峰值电流控制模式升压变换器的不稳定性及其原因,阐述了斜坡补偿的基本原理和设计问题。对基本的多谐振荡器电路进行了改进和优化设计,设计了适用于峰值电流模式PWM升压型DC-DC变换器斜坡补偿电路中的CMOS斜升波发生器电路。该电路基于UMC BiCMOS工艺设计,经HSpice仿真验证达到了设计目标,性能有很大改善,满足了芯片的需要。Instability and reasons of peak current controlled BOOST converter are simply analyzed, basic principles of slope compensation and design problems are also expatiated. A CMOS ramp - wave generator based on a conventional multivibrator is designed and optimized to offer the ramp - wave for slope compensation in a peak current controlled PWM BOOST DC - DC converter. This circuit is designed on the basis of UMC BiCMOS process,and its performances have been verified by HSpice simulation, the performances of circuit are improved greatly, satisfies the need of chip.

关 键 词：峰值电流控制 PWM 斜坡补偿 斜升波 

分 类 号：TN432[电子电信—微电子学与固体电子学]