中国空间科学技术

中国空间科学技术

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混合厚膜直流-直流变换器加速寿命试验和可靠性评估

刘罡;王其岗;   

  1. 兰州物理研究所;
  • 发布日期:2010-06-25

Acceleration Life Test and Reliability Assessment for Hybrid Thick Film DC-DC Converter

Liu Gang Wang Qigang (Lanzhou Institute of Physics,Lanzhou 730000)   

  • Online:2010-06-25

被引次数

3

摘要： 提出了一种混合厚膜直流-直流(DC-DC)变换器单步进应力加速寿命试验方法。以三种混合厚膜DC-DC变换器为样品,采用提高环境温度并按定时截尾方式进行加速寿命试验,可以在相对短的时间内完成样品的可靠性评估。通过分析失效样品,能够识别设计和制造缺陷,为改进提供依据,最终为混合厚膜DC-DC变换器通过可靠性鉴定并实现航天应用奠定一些基础。

关键词: 直流-直流变换器, 加速寿命试验, 可靠性评估, 失效分析, 供配电系统航天器

Abstract: A single step-stress acceleration life test method for hybrid thick film DC-DC converters was proposed.Sampling three kinds of hybrid thick film DC-DC converter,the acceleration life tests were conducted by raising the environmental temperature and under fixed-time curtailment,which can finish the sample′s reliability assessment in a relatively short time.By analyzing the failed sample,it was able to determine the fault of design & process,provide basis of improvement,and lay the foundation of passing reliability qualification and realizing space use for the hybrid thick film DC-DC converter.