Optimal feed-forward compensation for PWM DC/DC converters

An analytical procedure for optimizing the feedforward compensation for any PWM (pulse width modulation) DC-DC converter is described. The aim of achieving zero DC audio-susceptibility was found to be possible for the buck, buck-boost, Cuk, and SEPIC cells; for the boost converter, however, only nonoptimal compensation is feasible. Rules for the design of PWM controllers and procedures for the evaluation of the hardware-introduced errors are given. A PWM controller implementing the optimal feedforward compensation for buck-boost, CUK, and SEPIC cells is described and experimentally characterized.<<ETX>>

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