一种适用于Boost电路的自适应斜坡补偿电路  

An Adaptive Slope Compensation Circuit for Boost Converter

作　　者：张昱 叶益迭[1] 潘春彪 ZHANG Yu;YE Yidie;PAN Chunbiao(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo,Zhejiang315211,P.R.China)

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《微电子学》2022年第5期772-776,共5页Microelectronics

基　　金：浙江省自然科学基金资助项目(LY20F010003);宁波市自然科学基金资助项目(2019A610113);国家自然科学基金资助重点项目(62131010);宁波大学王宽诚幸福基金。

摘　　要：设计了一种适用于峰值电流模式Boost电路的自适应斜坡补偿电路。电路通过动态检测Boost电路的输入输出电压,产生随Boost电路开关控制信号占空比变化的斜坡电压,实现补偿斜坡斜率的最优化。由于本设计采用了高精度减法器,斜坡补偿精度得到提高,在消除次谐波振荡、提升Boost电路稳定性的同时,将补偿对Boost电路的负面影响最小化,保证了Boost电路的带载能力和动态响应速度。采用SMIC 0.18μm CMOS工艺完成电路设计和版图绘制,并进行了后仿验证,结果显示,工作电压为3.3 V时,在不同工作条件下,随着开关占空比的变化,补偿斜率可以实现自适应调整,与理论最佳补偿斜率的误差范围仅为1.39%~2.33%。An adaptive slope compensation circuit for boost converter was designed. By dynamically detecting the input and output voltages of the boost converter, the circuit generated a ramp voltage following the duty cycle, and optimized the compensation slope. Due to the high-precision subtractor, the slope compensation accuracy was improved to minimize the adverse impact of compensation to the boost converter while eliminating the sub-harmonic oscillations and improving the stability of the boost converter, with little impact on the load capacity and dynamic response speed. The circuit was designed in SMIC 0.18 μm process. The post simulation results show that, under different working conditions, the compensation slope can be adaptively adjusted with the duty cycle at an operating voltage of 3.3 V, and the error to the theoretical compensation slope is 1.39%~2.33%.

关 键 词：BOOST电路 自适应斜坡补偿 减法器 

分 类 号：TN86[电子电信—信息与通信工程] TN432