LED正向电压建模及SPICE仿真实践

Forward voltage modeling of LED and simulation practice of SPICE

LED新品层出不穷,人们常用计算机仿真的办法来模拟LED及其系统的热特性、电特性、光特性,并且模拟它们之间的动态相互影响。最简单的仿真是用EXCEL得出能够拟合LED特性曲线的公式,用SPICE软件通过建模实现仿真。为仿真而进行的LED建模工作有多种,该正向电压建模的思路可以推广到其它的LED建模中去。由于任何SPICE用户都可以直接使用由SPICE子电路实现LED模型,而不必对电路模拟软件的源代码进行修改,因此该模型具有广泛的应用价值。

New LED products emerge in an endless stream. The method of computer simulation and simulation of LED system are often used to simulate the thermal properties, electrical properties, optical properties and the dynamic interaction between them. The simplest simulation is obtaining the equation that can fit the LED curve by EXCEL, and modeling and simulation by SPICE software. There is a variety of LED modeling for simulation. The modeling method of forward voltage can be extended to other LED modeling. Any SPICE user can directly use the SPICE circuit to realize the LED modeling without modifying the source code of circuit simulation software, so the model has extensive reference value.