降压型DC-DC转换器的二次斜坡补偿电路设计  

Design of a Quadratic Slope Compensation Circuit for Buck DC-DC Converter

作　　者：陈远龙[1] 张涛[1] 王影[1] 张国俊[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《微电子学与计算机》2016年第8期82-85,91,共5页Microelectronics & Computer

摘　　要：考虑到传统线性斜坡补偿对开关电源系统带载能力和瞬态响应的影响,利用与频率成正比的充放电电流形成一次斜坡电流,再利用其一次特性与双极性晶体管的输入、输出特性实现了一种工作频率可变的,斜坡峰值电流随占空比变化的二次特性的斜坡补偿,使斜坡补偿所带来的不足有效减小.最后利用HHNEC 0.35μm的BCD工艺,及Hspice仿真软件对电路进行了仿真验证.Considering the influence on load capacity and transient response caused by the traditional linear slope compensation The proportional to the frequency of the charge and discharge current is used to form the first order slope current, then use it together with the input and output of the bipolar transistor characteristics realize quadratic slope compensation circuit which can work in different frequency and slope peak current changed with the duty cycle was proposed. The lack of the slope compensation effectively reduced, its performances have been verified by Hspice simulation using the 0.5 um BCD process.

关 键 词：一次斜坡补偿 二次斜坡补偿 带负载能力 瞬态响应 

分 类 号：TN4[电子电信—微电子学与固体电子学]