2011年全国大学生电子设计竞赛设计报告开关电源模块并联供电系统（A题）【本科组】2011年9月3日2开关电源模块并联供电系统（A题）【本科组】摘要：本系统设计采用降压型DC/DC变换器（BUCK电路）和脉宽调制控制器TL494作为硬件主体，以MSP430F169单片机最小系统为控制核心，通过软件闭环检测两个DC/DC模块的输出电流和负载电阻两端的电压，然后通过单片机自动调整两路DC/DC模块的PWM信号的占空比来达到均流和稳压。关键词：开关电源、均流、恒压、恒流2目录1设计任务与要求.....................................................................41.1设计任务...........................................................................................................................................41.2技术指标...........................................................................................................................................41.2.1基本要求................................................................................................................................41.2.2发挥部分................................................................................................................................51.3题目评析...........................................................................................................................................52系统方案的论证与选择...............................................................52.1系统方案的比较与选择..................................................................................................................52.2主要模块方案论证与选择..............................................................................................................52.2.1DC/DC模块方案论证...........................................................................................................52.2.2均流方案论证.......................................................................................................................63系统设计...........................................................................63.1系统硬件设计..................................................................................................................................63.1.1系统总体框图.......................................................................................