采用准谐振和同步整流技术的隔离功率开关电源研究  

Disquisition of Switch Power-Supply with Quasi-Resonance Techniques and Synchronous Rectifying Techniques

作　　者：桑泉 李坤 

机构地区：[1]中国兵器工业第214研究所,安徽蚌埠233042

出　　处：《通信电源技术》2009年第3期19-22,共4页Telecom Power Technology

摘　　要：介绍一种由常规PWM控制器改进设计为FM控制器,从而实现固定关断时间的变频准谐振模式的开关电源,输出级采用同步整流技术,大大降低了开关损耗和开关瞬时漏感引起的高频噪声,从而较好地解决了功率隔离开关电源的高频噪声电平高、功率损耗大的问题。One design of normal PWM controller improve to FM controller is discussed, accordingly, frequency changing resonance techniques with changeless off-time is designed, circuit output end with synchronous rectifying, so the high frequency noise and on-off-time power waste are reduced, then, the key problem of isolated switch power-supply is resolved.

关 键 词：FM控制器 隔离 准谐振 同步整流 

分 类 号：TM464[电气工程—电器]