一种用于白光LED驱动芯片的软启动电路设计  

Design of a Soft-Start Circuit for White LED Driver

作　　者：张蕾[1] 王志功[1] 

机构地区：[1]东南大学射频与光电集成电路研究所,江苏南京210096

出　　处：《电气电子教学学报》2009年第5期57-60,共4页Journal of Electrical and Electronic Education

摘　　要：本文提出了一种用于白光LED驱动芯片的软启动电路,限制启动时流入芯片的电流和输出端的电压过冲。该电路具有强的控制启动能力、结构简单、启动电流小。后仿真结果表明,基于0.35μm CMOS工艺模型参数,在3.3V电源电压下,该软启动电路软启动的时间典型值为2ms左右,输出电压将稳定为200mV。In this paper a softstarting circuit for white LED driver is presented.It eliminates the overshoot of the current or the output voltage during start-up time.This softstarting circuit controls the start-up effectively with a simple structure and a tiny start-up current.It is designed in 0.35μm CMOS process with 3.3V power supply.The post-simulation shows that a start-up time is 2ms and the output voltage is 200mV.

关 键 词：光源 LED驱动芯片 启动电路 

分 类 号：TN432[电子电信—微电子学与固体电子学]