功率因数校正手册(安森美)

《功率因数校正手册(安森美)》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、功率因数校正（PFC）手册选择正确的功率因数控制器解决方案HBD853/D版本2，2004年8月©SCILLC,2004“保留所有权利”若需要关于功率因数校正的其他信息，请致电800-282-9855或访问网站www.onsemi.com/tech-support与技术信息中心联系。序言针对全球高能效标准的电源设计电源设计一直是一个极富挑战性的工作。随着许多传统的难题得以解决，一些有关电源效率的规范和要求的标准将再次展现新的挑战。规范标准的第一个阶段其实已经开始，针对降低待机能耗（低负载状态）方面。下一个阶段的任务将更艰巨，就是提高工作状态下电源的效率。在美国国家环保局“能

2、源之星”(EnergyStar)计划以及中国中标认证中心(CECP)的推动下，世界各地正在公布有关电源工作效率的新能效标准。这些更有挑战性的标准将需要电源厂商及其供应商（包括半导体供应商）共同努力，提供能符合这些新要求的解决方案。在这些趋势中，IEC1000-3-2对功率因数校正（PFC）或降低谐波电流的强制标准要求，是近年来电源结构方面最大的变化。随着所有设备的功率不断增大，及降低谐波电流的标准也不断普及，越来越多的电源设计已经采用PFC。设计人员因此面临这样一个难题，既要在产品中采用合适的PFC电路，也要满足降低待机能耗、提高工作效率和EMI限制等高效指标。安森美半导体

3、（ONSemiconductor）一直致力于按特定的电源要求提供最理想的解决方案，包括为客户提供拓扑结构和元件选择方面的设计参考。本手册尝试着在满足系统总指标的前提下对各种PFC方案进行全面的比较。随着新技术和新元件的推出，人们可能会放弃一种方案去选择另外一种方案，但是本手册介绍的方法仍将是适用的，不会过时，可协助电源设计人员针对其特定的应用产品获得最佳的PFC电路选择。安森美半导体衷心地希望这本手册能帮助您设计出高效、经济的PFC电路。如需查看这方面的最新资料，敬请访问我们的网站：www.onsemi.com.cn。目录前言························

4、······················································································································································4第一章功率因数校正方法概述·····························································································································5

5、引言······························································································································································································5定义·······························································································

6、·······························································································5功率因数转换器的类型······························································································································································6无源控制器····················

7、······························································································································································7临界导电模式控制器····························································································