摘要
提出了基于开关电源集成控制器PSpice的开关电源集成控制器TL494的宏模型。由于它包含有开关电源控制所需的全部功能,广泛应用于单端正激、半桥式、全桥式开关电源,所以研究它的PSpice仿真模型对控制芯片的设计分析有重要的意义。首先给出TL494的内部结构和工作原理。对TL494各个功能模块建立了PSpice宏模型电路,再将各个功能模块封装起来,实现了TL494在PSpice中的模型库。然后设计了基于TL494控制的Buck电路,通过实验对所建模型进行验证,将仿真结果与实验结果进行对比,证明了所建模型的正确性与可行性。
The macro-model of switching power supply integrated controller TL494 is presented in this paper. Because TL494 contains all functions that a switching power controller needed, and it widely used in single-ended forward,half-bridge and full-bridge switching power supply,the study of PSpice macromodel of TL494 has important significance to the design and analysis of the controller chip. Firstly, the internal structure and working principle of TL494 is given. The macro-model of each PSpice function module is established and packaged,which realize the model of TL494 in the PSpice model library. And then a Buck circuit which based on TL494 control is designed, the macro-model of TL494 has been verified thought the experiment and the result of the simulation and experiment is contrasted, which proves the correctness and feasibility of the proposed model
出处
《系统仿真技术》
2013年第3期270-277,共8页
System Simulation Technology
基金
国家自然科学基金资助项目(61102061)
陕西省自然科学基金资助项目(2013JM8001)
陕西省教育厅科研计划资助项目(11JK0926)
关键词
宏模型
TL494
功能模块
BUCK电路
macro-model
switching power supply integrated controller
function module
buck circuit
