功率自适应LD开关电源的设计  

Design of LD switching power supply with power adaption

作　　者：陈瑞霞[1] 孟展[1] 白金柯[1] 毛海涛[1,2] 张锦龙[1] 

机构地区：[1]河南大学物理与电子学院,河南开封475004 [2]河南大学民生学院,河南开封475004

出　　处：《激光与红外》2010年第9期961-964,共4页Laser & Infrared

摘　　要：设计了一种基于开关电源的具有功率自适应功能的半导体激光器(LD)驱动电源,以单片机作为控制核心,结合外围硬件系统,利用PID算法,通过改变开关电源绝缘门极晶闸管(IGBT)的占空比实现了LD的恒流驱动和功率自适应调节。经实验证明,该驱动电路纹波系数低、效率高,光功率输出稳定度优于0.5%,可满足LD实际工作的需要。The design of a laser diode（LD） driver based on switching power supply with power adaption is introduced.The design uses the monolithic microcontroller as the control unit,together with external hardware circuits and PID algorithm.It can realize the constant current drive and power adaptive adjustment of the LD by adjusting the insulated gate bipolar transistor′s（IGBT） duty cycle.The experiment results show that the developed driver has low ripple factor,high efficiency,and high stability.The laser power output is of a stability better than 0.5%,which meets the practical needs of the LD.

关 键 词：半导体激光器 开关电源 功率自适应 PID算法 

分 类 号：TN248.4[电子电信—物理电子学]