文档详情

一款应用于LED驱动的过温保护电路.pdf

发布:2017-07-08约1.38万字共4页下载文档
文本预览下载声明
.趱透羹羹塑隧塑!堕堕!型型型 一款应用于LED驱动的过温保护电路术 崔晶晶,曾以成,夏俊雅 (湘潭大学微电子科学与工程系,湖南湘潭411105) 摘要:设计了一款电压随温度自适应变化,从而使驱动电流随温度自适应变化的过温保护电路。应用于LED驱动 电路,具有滞回关断的特点,在恒流输出中增加温度自适应模块,设计简单而且比较稳定。基于0.5¨mCMOS工艺, 使用Cadence 路在0-65oC,恒定输出350 mA,输出变化范围小于0.285%;在65—108oC范围内变化时,电流输出自适应范围为 85mA;在温度达到110℃时,关断信号为高电平,电路关断输出,直到温度下降到60℃时,电路重新开启。 关键词:恒流输出;温度自适应;滞回关断;LED驱动;过温保护 中图分类号:TN432 文献标识码:A 英文引用格式:Cui ofacircuitwith toLED Jingjing,ZengYicheng,XiaJunya.Design overtemperatureprotectionapply driver[J] ofElectronic Application Technique,2017,43(6):41—44. ofacircuitwith toLEDdriver Design overtemperatureprotectionapply Cui Jingjing,ZengYicheng,XiaJunya ofMicroelectronicsScienceand 411 105,China) (Department Engineering,XiangtanUniversity,Xiangtan Abstract:An circuitis whose current withthe of serf— overtemperatureprotection designed driving changes voltagetemperature of and inthecon· hasthecharacteristic thermal—shutdownaddsthe changes.Circuit adaptive hysteresis temperatureserf—adaptive stant-current is andstable on0.5 standardCMOS circuitissimulated output.Circuitsimple relatively.BasedIxm technology,the by Cadence resultshowsthatthereference with drift,and coefficientis Spectre.The voltagehighprecision,lowtemperaturetemperature 1.6x10’5/℃.TheLED 350mAin0-65℃andits isunder0.285%.Thevariation drivercircuitcurrent outputs changeable
显示全部
相似文档