Construction of the UC2845 Simulation Model Based on Matlab/Sumlink

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhang, Jie^1 ; Zhao, Xiaokang^1 ; Jin, Zhuofan^2 ; Zhou, Wandong^1

Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan

430068, China^1

Hubei Electric Power Equipment Co. LTD, Wuhan

430068, China^2

关键词: Chip simulations;    Current samplings;    Internal structure;    MATLAB /simulink;    Peak current control;    Simulation circuits;    Simulation model;    Switching power supplies;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/3/032120/pdf
DOI  :  10.1088/1755-1315/252/3/032120

来源: IOP

【 摘 要 】

MATLAB/Simulink has some gaps in the simulation of the internal structure of the integrated chip. The article analyzes the internal structure of the UC2845 peak current control integrated chip and divides its internal parts into four parts: startup section, oscillation section, feedback section and current sampling section. The working principle and working process of each part of the chip are analyzed. The simulation model of each part is built based on MATLAB/Simulink platform, and the UC2845 chip simulation model is completed. Based on the chip model, a simulation circuit of DC24V/15V switching power supply was built. Based on UC2845 chip, an experimental circuit of DC24V/15V switching power supply was built. The simulation waveform and experimental waveform were compared, and the accuracy and practicability of the chip simulation model were verified. The chip simulation model has reference and guidance value for the simulation of UC18, UC28, UC38 series integrated chips in MATLAB/Simulink.