Current programmed control nonresonant coupled parallel resonant convertor

In the nonresonant coupled parallel resonant convertor operated below unity gain, the inductor current at the switching points has a maximum value which is determined by the convertor gain and the output load. By switching transistors at predetermined inductor current levels, it is possible to regulate the output voltage due to output current and input voltage variations. The peak inductor current, which can be limited to desirable values, is regulated by the control circuit. By using nonresonant coupling in the output circuit, the maximum capacitor voltage is clamped to the output voltage level; thus, the convertor has low voltage stresses. In the paper, the authors introduce the analysis and design of this convertor. The performance characteristics of the convertor are also presented. Computer simulation results are used to verify the authors´ theoretical work