开关电源倍流同步整流器的研究  

Research on Current-Double-Synchronous-Rectifier in Switch Mode Power Supply

作　　者：周辉杰[1] 何志伟[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《现代电子技术》2006年第8期6-9,共4页Modern Electronics Technique

摘　　要：在开关电源的实际应用中,MOSFET的寄生电容、栅极电感、漏源极电感,变压器漏感以及电路布线产生的寄生参数,对电路工作状态有很大的影响。对此介绍了倍流同步整流器的工作原理和过程。并对倍流同步整流器的基本结构控制方式进行了分析比较。通过对倍流同步整流器在3种不同的信号驱动下的波形观测比较和对电路中寄生参数对电路的影响进行了仔细的研究和分析,从而得出了较好的驱动方式。The parasitic parameter which is caused by MOSFET parasitic capacitance,gate inductor, drain and source inductor,transformer leakage inductor and circuit wiring greatly affect the circuit operational state in the switch mode power supply application. The article presents the principle and work processes about current - double - synchronous - rectifier, and analyzes its basic frame and control methods. It gets better driving modes, which is based on observing and comparing the current - double - synchronous - rectifier＇s waveforms which are driven by different signals, careful research and analysis about the parasitic parameters which affect the current - double - synchronous - rectifier.

关 键 词：倍流同步整流器 低压大电流 半周期驱动 开关电源 

分 类 号：TN86[电子电信—信息与通信工程]