一种基于boose-buck拓扑的LED驱动电路  

LED Driver Based on Boose-buck Topology

作　　者：姚帅[1] 余桂英[1] 

机构地区：[1]中国计量学院计量测试工程学院,浙江杭州310018

出　　处：《照明工程学报》2009年第3期24-27,共4页China Illuminating Engineering Journal

基　　金：浙江省科技计划项目:LED汽车前照灯的研制(2008C21158)

摘　　要：采用AT9930芯片,设计了一款车载LED驱动电路,其驱动、拓扑、调光方式分别采用更具优势的开关型变换器、boost-buck(升降压型)拓扑和PWM(脉宽调制)方式。实验证明,该驱动电路具有输入电压范围宽,恒流精度高,可靠性高、EMI(电磁干扰)低等特点。A LED driver used in automobile application was proposed, basted on AT9930. Switching converter, boost- buck topology and pulse width modulation （PWM） dimming, the performance of which was excellent, were chosen. The experiment result shows that the driver has advantages of wide input voltage range, high accuracy constant output current, high reliability and low EMI.

关 键 词：AT9930 升降压拓扑 开关型变换器 脉宽调制 

分 类 号：TN312.8[电子电信—物理电子学]