一种基于LC振荡器的高效隔离式DC-DC开关电源  

A High Efficiency Isolated DC-DC Switching Power Supply Based on LCOscillator

作　　者：尹珑翔 韦雪明[1] 罗和平[2] 蒋丽[1] YIN Longxiang;WEI Xueming;LUO Heiping;JIANG Li(Guangxi Key Lab.of Precision Navigation Technol.and Applic.,Guilin Univ.of Elec.Technol.,Cruilin,Guangxi 541004,P.R.China;School of Electronic Science and Engineering,Univ.of Elec.Sci.and Technol.of China,Chengdu 610054,P.R.China)

机构地区：[1]桂林电子科技大学广西精密导航技术与应用重点实验室,广西桂林541004 [2]电子科技大学电子科学与工程,成都610054

出　　处：《微电子学》2018年第6期733-737,共5页Microelectronics

基　　金：广西自然科学基金资助项目(2015GXNSFAA139301);广西精密导航技术与应用重点实验室基金项目(DH201708);广西高等教育本科教学改革工程项目(2018JGA160);桂林电子科技大学研究生教改项目(YKC201703) .

摘　　要：设计了一种基于片上变压器的隔离式DC-DC开关电源。通过分析影响开关电源能量转换效率的因素,设计了一种应用于隔离式DC-DC开关电源的LC振荡器,提高了隔离式开关电源的整体效率。采用CSMC 0.35μm BCD工艺进行设计,并将该振荡器应用于隔离式开关电源。隔离式开关电源的输入电压为3.3V,输出电压为5V。仿真结果表明,时钟振荡频率为180 MHz,应用该振荡器的DC-DC开关电源最大输出电流达到62mA,转换效率提高到35.6%。An isolated DC-DC switching power circuit based on on-chip transformer was designed.By analyzing the energy conversion efficiency of DC-DC switching power,an LC oscillator using isolated DC-DC switching supply circuit was designed,and the efficiency of the isolated switching power converter had been increased.The oscillator was designed in CSMC 0.35μm BCD process and used in an isolated DC-DC converter.Simulation results showed that the converter was fulfilled with the function of converting 3V input voltage to 5V output voltage while the clock oscillation frequency of the DC-DC converter was 180MHz,the maximum output current of the converter was 62mA,and its conversion efficiency was improved up to 35.6%.

关 键 词：片上变压器 隔离式DC-DC开关电源 LC振荡器 

分 类 号：TN86[电子电信—信息与通信工程] TN433