This document summarizes the analysis, design, and performance evaluation of an edge-resonant switched capacitor cell-assisted soft-switching PWM boost DC-DC converter and its interleaved topology. The converter uses an edge-resonant switched capacitor cell to achieve zero-current turn-on and zero-voltage turn-off of the active switches, minimizing the reverse recovery current in the freewheeling diode. Circuit design guidelines and theoretical analysis of voltage conversion ratio are presented. Laboratory prototypes of the single converter and interleaved topology are evaluated experimentally and their performances are discussed.

1. ANALYSIS, DESIGN, AND PERFORMANCE EVALUATIONS OF AN EDGERESONANT SWITCHED CAPACITOR CELL-ASSISTED SOFT-SWITCHING
PWM BOOST DC–DC CONVERTER AND ITS INTERLEAVED TOPOLOGY
ABSTRACT:
This paper presents a soft-switching pulsewidth modulation (PWM) non isolated boost dc-dc converter
embedding an edge-resonant switched capacitor (ER-SWC) cell and its interleaved circuit topology. The
conceptual boost dc-dc converter treated herein can achieve high-frequency zero-current soft-switching turn-on
and zero-voltage soft-switching turn-off operations in the active switches and minimization of a reverse
recovering current in the freewheeling diode under discontinuous conduction mode partially including critical
conduction mode in the input current. Those advantageous properties enable a wide range of soft-switching
operations together with a high-voltage step-up conversion ratio with a reduced current stress. Circuit design
guideline based on the soft-switching range is introduced; then, a theoretical analysis is carried out for
investigating the step-up voltage conversion ratio. For demonstrating the effectiveness of the ER-SWC softswitching PWM boost dc-dc converter and its newly developed interleaved topology, laboratory prototypes are
evaluated in experiments; then, their performances are discussed from a practical point of view.