CAJ | 학술논문

目前电源技术的发展趋势为高频、高效率、高密度.介绍了专为有源箝位变换器设计的芯片UCC2897以及实现ZVS有源箝位的工作原理.同时,详细介绍了一款18～36V输入、5W50W输出,工作频率为300kHz,基于UCC2897的有源箝位同步整流DC/DC变换器的电路设计,并对关键器件进行损耗分析,最后进行了实验验证.结果表明,该变换器可以很好地实现主辅开关管的ZVS开通,满载效率可达90%.
목전전원기술적발전추세위고빈、고효솔、고밀도.개소료전위유원겸위변환기설계적심편UCC2897이급실현ZVS유원겸위적공작원리.동시,상세개소료일관18～36V수입、5W50W수출,공작빈솔위300kHz,기우UCC2897적유원겸위동보정류DC/DC변환기적전로설계,병대관건기건진행손모분석,최후진행료실험험증.결과표명,해변환기가이흔호지실현주보개관관적ZVS개통,만재효솔가체90%.
Now the development of the power supply trends to high frequency,high efficiency and high density.UCC2897 and operation principle of active clamp forward converter to achieve ZVS are mainly introduced.The design process of active clamp synchronous rectification forward DC/DC converter based on UCC2897 with 18～36 V input,5 V/50 W output and 300 kHz frequency are introduced and verified,so as loss analysis of key devices.The experimental results show that the main and auxiliary switchs used in the new converter can achieve ZVS,and the efficiency can achieve 90%,in line with the development trend of power supply technology.