Buck级联推挽数字化控制的环路分析设计  

Loop Analyze for the Digital Control of Buck Cascade Push Pull

作　　者：孟慧英[1] 张常玉[1] 

机构地区：[1]上海贝尔股份有限公司,南京江苏210037

出　　处：《电源世界》2016年第1期25-28,共4页The World of Power Supply

摘　　要：在宽输入范围、低压大功率的场合,由于两级/级联拓扑变压器设计简单,原副边开关管耐压低,效率高等原因越来越受到设计者的青睐。由于数字化控制的灵活性、功能多等原因,数字化控制越来越广泛的应用到各种各样的产品中。本文以buck级联推挽为例简述了两级架构的工作原理,小信号分析,分析了基于ADP1051数字化芯片控制数字化环路的设置原理,对环路控制进行了计算分析,对环路调试提出了新的思路,并且进行了试验验证。For wide input range,low voltage and high power applications,as in the design two-stage topology the transformer is simple,the spike of the MOSFET is low,and the efficiency is high.So two-stage topology is more and more favored by the designers.Due to the flexibility of the digital control,multiple functions and other reasons,digital control is more and more wide used in variety of products.This paper introduce the working principle of two-level architecture of buck cascade push pull,and do the small signal analysis,the analysis is based on ADP1051 digital control chip,the control loop were calculation and analysis,and the test was carried out to verify.

关 键 词：buck级联推挽电路 环路控制 数字化控制 

分 类 号：TN86[电子电信—信息与通信工程]