An analog macromodel of the SG1525A PWM for use with SPICE 2G.6 simulators

An analog macromodel for the SG1525A PWM (pulse width modulator) has been developed that is compatible with SPICE2G.6 and PSPICE version 5.1 analog simulators. The SG1525A PWM integrated circuit is a sophisticated design which provides accurate performance while lowering the external parts count when used to implement all types of switching power supplies. The analog macromodel exhibits no convergence problems, simulates realistic line and load responses, frequency response, and output voltage levels, and has time domain capability. Model development and a comparison of macromodel performance with actual measurements are discussed.<
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