2002•Unpublished venueRequires access

Analysis and design of class E isolated DC/DC converter using class E low dv/dt PWM synchronous rectifier

Itsda Boonyaroonate, Seiji Mori

Abstract

A class E isolated DC/DC converter for regulating the output voltage at a fixed switching frequency is presented, analyzed and experimentally verified. It consists of class E series-resonant inverter, high-frequency transformer and class E low dv/dt PWM synchronous rectifier. By controlling the conduction time of controlled switch in rectifier, high-frequency AC current is rectified and the output voltage can be controlled at the same time. The ZVS condition of all switches can be maintained from full-loaded to open-loaded. The theoretical predictions were in good agreement with the experimental measurements and the maximum efficiency measured at switching frequency 1 MHz was 91.2%.

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Key concepts: Pulse-width modulation, Transformer, Voltage, Rectifier (neural networks), Inverter, Forward converter, Switching frequency, Control theory (sociology)