基于LTCC技术的DC-DC变换器基板设计

摘要

为满足当代电子系统的要求,DC-DC变换器需要具有小型化、轻型化以及高的可靠性的特点.该文在低温共烧陶瓷(LTCC)工艺的基础上,设计了一款内埋置电感的DC-DC压降变换器的电路基板.利用Ansoft Maxwell对功率电感进行建模和仿真,对气隙层如何影响电感直流特性进行了研究;对整个变换器的输入、输出回路以及反馈电路进行设计.最后,得到了一款尺寸为20 mm×15 mm×1 mm,饱和电流大于2A的LTCC电路基板.%In order to meet the requirements of modem electronic systems,the DC-DC converter needs to have such characteristics as small,light and high reliability.In this paper,a DC-DC converter substrate with embedded inductor is designed by using low temperature co-fired ceramic (LTCC) technology.The embedded power inductor is modeled and simulated,and the DC characteristics are studied with Anosft Maxwell.The input output circuits and feedback circuit have also been designed.At last,a DC-DC converter with the size 20 mm× 15 mm× 1 mm and the saturation current more than 2 A has been fabricated.