一种600W全砖DC-DC电源模块设计

摘要

研究了一种270V/24V 600W全砖高密度电源模块，采用了移相全桥变换拓扑结构。分析了其软开关的工作原理，设计了具体的实现电路。该模块同时具有输入过、欠压保护，输出过、欠压保护，过流保护、并联均流等功能。通过对原理样机的测试，在额定输入电压、半负载以上工作时，转换效率不低于85%，并联精度最高达2.77%。%This paper proposes a 270V/24V 600W high power density Ful- brick DC- DC converter using the phase- shifted ful- bridge topology. Firstly,research the soft switch topology mode of the DC- DC converter. Secondly, design the circuits. It has input/output under/over-voltage protection, over- current protection, over- temperature protection, and paral el current sharing. By experiment, result show that it has more than 85%efficiency and 2.77%precision of paral el current sharing over the half load.