应用于电流控制型DC—DC开关变换器的分流开关技术  

The Branch-switch Technique for Current-Controlled DC—DC Switching Regulators

作　　者：刘其贵[1] 魏同立[1] 

机构地区：[1]东南大学微电子中心,江苏南京210096

出　　处：《电路与系统学报》2004年第4期125-128,共4页Journal of Circuits and Systems

摘　　要：在简要讨论电流控制型DC—DC开关变换器基本原理及优点的基础上,分析了限流采样小电阻难以单片集成的问题,由此提出了解决此问题的分流开关技术,并给出了双极型和MOS型分流开关的详细公式推导,最后通过具体的设计实例,验证了分流开关技术应用于电流控制型DC—DC变换器的可行性。After a brief discussion on the principle and merits of current-controlled DC—DC switching regulators, the integration difficulty of the small current-limiting and sampling resistor is analyzed. Therefore, the branch-switch technique is proposed to solve this problem. Formula for Bipolar and MOS branch-switches is deduced. Finally, the effectiveness of the branch-switch technique for current-controlled DC-DC switching regulators is verified by experiment on a practical example.

关 键 词：电流控制型 DC-DC开关变换器 分流开关 

分 类 号：TN43[电子电信—微电子学与固体电子学]