III. DESIGN AND EXPERIMENTAL RESULTS To verify the analytic deduction, a 19V/6A, 250kHz prototype is designed and built. Since the operation frequency is promoted, the resonant inductor can be integrated into the leakage inductor of the transformer. The hardware configurations are described as below. Operation parameters of converter Input voltage V Vi 390 = ; Output voltage V Vo 19 = ; Output load current () AI o 6 .5,0= ; Switching frequency kHz f 257 = . Parameters of electronic components Input capacitor 180 /450 FV μ ; Output capacitor 2700 /25 FV μ ; Power MOSFET SPP11N60C3 2 × ; Schottky diode rectifier STPS20H100CT; Resonant capacitor 10 /630 nF V ; Transformer Primary 60T, Secondary 6T; Magnetizing inductance 500 m LH μ = ; Leakage inductance 40 leakage r LLH μ == . As a result, the ZVS characteristic is achieved with various loads. Finally, a comparison data between experimental and analytic is listed in TABLE I. TABLE I COMPARISON DATA BETWEEN EXPERIMENTAL AND ANALYTIC