一种基于PSIM的脉宽调制芯片SG3525的建模与仿真

SG3525是一种应用非常广泛的脉宽调制芯片，在开关电源设计中得到了非常广泛的应用。本文以其为研究对象，对其功能详细研究，并根据资料手册在PSIM中对其各个模块进行建模。最后，将所搭建的各个模块相结合并利用PSIM现有的模块封装功能将其封装起来，用于控制一个全桥DC—DC变换，并通过仿真来验证其功能。

Modeling and Simulation of a PWM Chip SG3525 Based on PSIM

As a kind of regulating pulse width modulator chip, SG3525 has been widely used in the switching power supply design. In this paper, with the software of PSIM, function models for each modules of SG3525 are studied, constructed and connected accord- ing to the reference manual in PSIM, and then, for the control of a DC-DC full bridge converter, all the function models of SG3525 are packaged in one sub-circuit. A simulation analysis is provided thereafter, showing the applicability of the proposed method.