Modeling and analysis of computer power systems

Two techniques for time-domain analysis, cycle-by-cycle simulation of switched linear circuits and state-space averaging, are discussed in the context of modeling computer power systems. These techniques are compared by studying the output voltage response of a single DC-to-DC power converter to a transient load. Measured data are used to validate the simulated results. Simulation CPU times are also presented along with a discussion on the pros and cons of each approach. Predicting the response to line and load transients of a much larger system composed of three paralleled DC-to-DC converters is studied using state-space averaged models implemented in SPICE