Abstract
Abstract
With the development of electronic technology, integrated circuit design becomes
more complicated and chip size is getting smaller and smaller. Circuit simulation turns out
to be a significant part of IC design. Some EDA companies have also introduced a variety
of simulation tools. Due to the complexity of IC design, the extension of simulation time is
still a problem which can not to be ignored in circuit design industry. For example, the
digital-analog mixed signal simulation software PSPICE can achieve high accuracy and
measurement of various circuit parameters at the expense of long simulation time. Model
simulation which Matlab/Simulink software build is quicker, but Matlab/Simulink software
fails in testing the parameters of circuit components. Taking the simulation of LNK364
switching power supply system for example, the thesis studies on Co-Simulation with
Matlab and PSPICE, which is faster and can ensure the accuracy of simulation.
This thesis focuses on the simulation analysis of LNK364 switching power supply
system. Firstly, the circuit is simulated with PSPICE software. Secondly, the LNK364
control chip is modeled with Simulink tools of Matlab software. Then the other parts of
LNK364 switching power supply system are still using PSPICE software to implement the
circuit structure and simulation. Thirdly, the circuit built up by PSPICE and the simulink
model circuit is connected by SPLS, then Co-Simulation is come out. Finally, the
Co-Simulation results are compared with the simulstion results only using PSPICE
software, the output waveforms are basically the same, which proved that Co-Simulation
used far less time than PSPICE. So the Co-Simulation can shorten the simulation time in
the premise of ensuring the accuracy of simulation, which has achieved the expected
results. In addition, when the stimulus is created, the data can come from Matlab. And the
Monte Carlo analysis result achieved by PSICE simulation is led back into Matlab for data
post-processing. In this way the hand shake between the PSPICE and Matlab is realized. In
brief, the Co-Simulation of Matlab and PSPICE simulation software can not only provide
excitation signal and shorten the simulation time but also manage the post-processing of
simulation result, thus improve the efficiency of circuit simulation and reduce the design
cycle to some extent.
Keywords
：Co-Simulation Modeling of Simulink LNK364 Switching power supply
PSPICE simulation
