全桥DC/DC电源模块三维组装技术研究

3D Assembly Technology for Full-Bridge DC/DC Power Supply

中文关键词:  三维组装  堆叠  全桥  DC/DC电源模块

英文关键词:3D assembly  stack  full-bridge  DC/DC power supply

中文摘要:

      针对宇航DC/DC电源的体积和重量已接近极限的现状，设计了一种新型的三维立体组装电源模块，将各种器件以不同的堆叠和互连方式在三维空间内进行组装，使用裸芯片替代分立器件，采用陶瓷基板和柔性电路实现阻容器件预埋和板间堆叠互连，解决集成密度提高后功率变换电路的组装工艺、高效散热等问题。建立模态和振动模型分析模块内部的器件布局和受力情况，对模块的力学性能进行了验证。完成了开关频率为100 kHz、输入50～70 V、输出功率120 W的DC/DC功率开关电源的研制，相同输出功率下比现用模块化电源体积减小50%。

英文摘要:

      The volume and weight of aerospace DC/DC power supplies are approaching their limit,thus a new 3D assembly power module is designed.In the module,devices are 3D assembled in different stacking and interconnecting ways.Discrete devices are replaced by bare chips.Ceramic substrates and flexible circuits are used to realize the pre-buried and inter-plate stacking interconnection of resistive and capacitive devices,so as to solve the problem of assembly process and efficient heat dissipation of power conversion circuit after the integrated density increased.The modal and vibration models were established to analyze the internal layout and stress of the module,and the mechanical performances of the module were verified.The DC/DC power switching module with switching frequency of 100 kHz,input of 50~70 V and output power of 120 W has been developed.50% reduction in volume while the power level remains the same is achieved.