反激同步整流模块的研究

随着电力电子技术的发展,数字处理电路的工作电压不断降低,保持电路的高效受到了很大的技术挑战。这是由于在低压电源中,二极管的正向压降引起的损耗占了电路总损耗的50%以上。由于MOSFET同步整流管SR的低导通电阻,在大量的电路中都用来代替效率低的肖特基二极管,特别是在低压电源中。在反激变换器的基础上,将同步整流方案应用到反激变换器的副边,大大简化了传统电流源高频链逆变器的控制方案,从而有效地降低了整流管导通损耗,将整机效率大幅提高。该反激变换器模块的研究适合中小功率开关电源的推广应用,具有较好的应用价值。

Instead Stirs Up the Synchronized Rectification Module the Research

With the development of power electronics technology,the operating voltage of digital processing circuits has reduce continuously,which bring the technical challenges to maintain the high efficiency of the circuit.In the low-voltage power supply,the diode forward voltage drop caused by the total circuit loss accounted for more than 50% loss.MOSFET synchronous rectifier SR as a result of the low resistance,in a large number of circuits are used to replace schottky diodes with low efficiency,especially in the low-voltage power supply.On the basis of the flyback converter,the synchronous rectification program will be applied to the flyback con-verter vice side,greatly simplifies the traditional chain of high frequency current source inverter control scheme,which effectively reduces the rectifier conduction losses,machine efficiency will be greatly improved.The flyback converter design for small and medium-power switching power supply application,which will has good value.