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Design of a Digital PWM Controller for a Soft Switching SEPIC Converter  

Nashed, Maged N.F. (Electronics Research Institute)
Publication Information
Journal of Power Electronics / v.4, no.3, 2004 , pp. 152-160 More about this Journal
Abstract
This paper presents analysis, modeling, and design of a low-harmonic, isolated, active-clamped SEPIC for future avionics applications. Simpler converter dynamics, high switching frequency, zero voltage-Transition-PWM switching, and a single-layer transformer construction result. This paper describes complete design of a digital controller for a high-frequency switching power supply. Guidelines for the minimum required resolution of the analog-to-digital converter, the pulse-width modulator, and the fixed-point computational unit is derived. A design example based on a SEPIC converter operating at the high switching frequency is presented. The controller design is based on direct digital design approach and standard root-locus techniques.
Keywords
SEPIC converter; zero voltage-Transition-PWM switching; and a digital controller for a high-frequency switching power;
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