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The SPICE PLUS simulation program offers circuit designers full capability for simulating magnetic cores used in power supplies and in other power design circuits. This paper is an overview of the model, its capabilities, and application. The magnetic model defines both major and minor hysteresis loops, which are derived from the dynamic relationship between magnetic flux density and magnetic field...
A computer model of a buck switching regulator has been developed without any approximation that would limit its use to small signal perturbations and small load changes. The model can show the regulator's responses to a wide variety of disturbances. The regulator's transient and steady state responses to these disturbances can then be optimized by varying the voltage and current gains and/or including...
A general small-signal model for current-programmed switching power stages is used for design-oriented analysis of a 150W buck regulator. The model, into which the current-programming minor feedback loop is absorbed, exposes the desired tendency towards "constant" output current. The regulator voltage loop remains the only explicit feedback loop, allowing the regulator closed-loop properties...
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