【摘要】 随着电子系统小型化,开关电源的体积受到限制,要求开关电源在满足体积的条件下,能够实现高效率指标。分析了影响开关电源效率的各种因素,评估了各种拓扑对体积受限的小功率电源的影响,找到了适合此种电源的拓扑结构。基于该分析,设计了一个高效率的小功率电源,对电源的变压器、输入滤波器、输出滤波器和反馈环路等进行仿真设计。采用该方案,设计了一个验证电路。仿真和实验电路测试结果表明,分析设计满足要求。更多还原

【Abstract】 Miniaturization of electronic systems requires smaller switching power supply with high efficiency.Factors to affect efficiency of switching power supply were analyzed,and a comprehensive study was made to estimate effects of different topologies on miniaturized low-power switching power supply.A high efficiency and low-power DC/DC converter,including transformer,input/output filters and control loop,were designed and simulated based on the analysis.A demo board was designed based on the topology.Both simulation and test results showed that the circuit met target specifications.更多还原