面向大功率LED电源驱动的PT4115控制系统  

Large power LED driven PT4115 control system

作　　者：张小红[1] 欧浩源[1] 

机构地区：[1]广东职业技术学院,广东佛山528041

出　　处：《贵州师范大学学报（自然科学版）》2014年第4期62-65,共4页Journal of Guizhou Normal University：Natural Sciences

摘　　要：从LED的特性和驱动方式出发,论述了LED的各种驱动方式,以流过LED的电流恒定为基本目的,提出一种基于芯片PT4115的线性恒流驱动解决方案,设计了一个简单的LED驱动电路,并阐述了该驱动电路的基本原理,给出了理论依据。该驱动电路简单、高效、成本低,在电源电压或环境温度变化时可为大功率LED提供恒定的驱动电流,适合当今LED产品的市场化发展。This paper starting from the characteristics of LED and driving method,discusses the various LED drive mode,and the constant current flows through LED as the basic objective,this paper puts forward a linear chip based on PT4115 constant current drive solutions,a simple LED drive circuit design,and elaborates the basic principle of the drive circuit,gives the theoretical basis.The driving circuit is simple,high efficiency,low cost,in the power supply voltage and temperature of environment may provide the driving current constant for high power LED,suitable for market development of todays LED products.

关 键 词：大功率LED 驱动电路 恒流驱动 PT4115 

分 类 号：TN108.7[电子电信—物理电子学] O231.1[理学—运筹学与控制论]