Applying Novel Soft Switching to Synchronously Rectified Buck Converters

作者：Hwu K I^*

来源：International Review of Electrical Engineering, 2008, 3(5): 837-843.

• SR Buck Converter
• Soft Switching
• Duty Cycle Loss

In this paper, a novel approach for designing soft switching for synchronously rectified (SR) buck converters is presented, which contains one resonant MOSFET switch, one resonant inductor, one resonant capacitor, one diode. In such a circuit, the resonant MOSFET switch can he driven by one half-bridge driver, without the problem in float driving. Besides, the resonant inductor is not connected in series with the output input, and hence there is no problem in duty cycle loss. Also, the resonant capacitor is connected in parallel with the parasitic capacitance of the MOSFET switch and hence there is a slight effect of such parasitic capacitance on the resonant behavior. Eventually, the detailed illustration of the basic operation of the proposed resonant circuit, together with some simulated and experimental results, is provided to demonstrate its effectiveness.

• 出版日期2008-10
• 单位中国科学院电工研究所