欢迎来到天天文库
浏览记录
ID:55688101
大小:816.53 KB
页数:11页
时间:2020-05-24
《IC的热特性-热阻.pdf》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、ApplicationReportZHCA592–January2014IC的热特性-热阻刘先锋SeasatLiu,秦小虎XiaohuQin肖昕JerryXiaoNorthChinaOEMTeam摘要IC封装的热特性对IC应用和可靠性是非常重要的参数。本文详细描述了标准封装的热特性主要参数:热阻(ΘJA、ΘJC、ΘCA)等参数。本文就热阻相关标准的发展、物理意义及测量方式等相关问题作详细介绍,并提出了在实际系统中热计算和热管理的一些经验方法。希望使电子器件及系统设计工程师能明了热阻值的相关原理及应用,以解决器件及系统过热问题。目录1引言................
2、................................................................................................................................22热特性基础.....................................................................................................................................23热阻...............
3、.................................................................................................................................24常用热阻值.....................................................................................................................................55有效散热的经验法则.......
4、................................................................................................................65.1选择合适的封装......................................................................................................................65.2尽可能大面积的PCB覆铜..............................
5、.........................................................................65.3增加铜厚度.............................................................................................................................85.4用散热焊盘和过孔将多层PCB连接............................................................
6、.............................85.5合理的散热结构,不影响散热路径,便于热能的扩散..............................................................85.6散热片的合理使用...................................................................................................................95.7选取合适的截面导热材料...........................
7、.............................................................................95.8机箱散热.................................................................................................................................95.9不要在散热走线上覆阻焊层................................................
此文档下载收益归作者所有