宽转换范围的峰值电流模式BUCK电源环路设计  

Design of Peak Current Mode BUCK Power Supply Loop with Wide Conversion Range

作　　者：陈波 CHEN Bo(Shanghai BCD Microelectronics Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]上海新进芯微电子有限公司,上海200240

出　　处：《自动化应用》2024年第23期54-58,共5页Automation Application

摘　　要：宽转换范围的BUCK电源芯片使用峰值电流控制模式设计需要考虑全工作范围内的稳定性。首先分析了峰值电流型BUCK变换器的小信号模型,归纳了其稳态工作时的传输函数。然后描述了控制环路的设计过程,尤其是Type Ⅱ和Type Ⅲ型跨导运放的补偿网络的选择和设计方法。最后通过Mathcad及Simplis电路仿真对宽转换范围的BUCK电源芯片环路设计结果进行了验证和总结。The design of peak current control mode for BUCK power supply chip with a wide conversion range needs to consider stability throughout the entire operating range.Firstly,the paper analyzes the small signal model of peak current mode BUCK converter,and summarizes the transfer function during steady-state operation.Then,the design process of control loop was described,especially the selection and design method of the compensation network for TypeⅡand TypeⅢtransconductance operational amplifiers.Finally,the loop design results of the BUCK power supply chip with a wide conversion range were verified and summarized through Mathcad and Simplis circuit simulation.

关 键 词：峰值电流型 宽范围BUCK变换器 控制环路设计 电源稳定性 

分 类 号：TN86[电子电信—信息与通信工程]