半导体激光器驱动源功率器件的建模与仿真

Modeling and Simulation of High Power Laser Diode Driver Design

模拟电路、数字电路及数模混合电路中小信号电路的仿真技术现已趋于成熟,而大功率电路的仿真技术尚需完善。当大功率器件处于工作状态时,功率器件会发热。小信号电路的仿真技术尚不能模拟大功率电路的工作状态。半导体激光器驱动源功率执行级为大功率电路,建立能描述其功率器件工作状态的PSPICE仿真软件模型是亟待解决的问题之一。依据功率器件的结构、工作原理及其功耗等建立了包含热模型的金属—氧化物—半导体场效应晶体管(MOSFET)模型,使用此模型对半导体激光器驱动源进行了计算机仿真优化研究。通过实际系统验证了该模型的正确性。该模型也适用于其它大功率电路的计算机仿真。

Analog circuits,digital circuits and digital-analog hybrid circuit small-signal circuit computer simulation technology is now mature,but the high power circuit＇s computer simulation technology must consummate. When the high-power device is active,the power device will generate heat. The small sig-nal circuit＇s computer simulation technology still could not simulate the high power electric circuit＇s active status. The power stages of semiconductor laser driver mostly are high power circuit,the establishment of power devices can describe the working state of the PSPICE simulation software model is one of the prob-lems that must be solved. A metal-oxide-semiconductor field-effect transistor （ MOSFET） model,including thermal model,was established according to the structure,operating principle and self-consumption of power device. The computer simulation of semiconductor laser driving source was conducted by using this model. The model was verified by a practicable system. This model is also suited for the computer simulation of other high power circuits.