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选择DC/DC稳压器的可靠性(Linear)
摘要:我们来看一下DC/DC稳压器:基本上都是密封在类似IC那样的一个封装中的完整DC/DC稳压器电路。我们假定,您已经研究了对几家厂商提供的产品进行选择的问题,而且所有这些产品都或多或少地提供了电源转换功能,并满足您的大部分需求。
Abstract:
Key words :

  我们来看一下DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" 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title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器" title="DC/DC稳压器">DC/DC稳压器:基本上都是密封在类似IC那样的一个封装中的完整DC/DC稳压器电路。我们假定,您已经研究了对几家厂商提供的产品进行选择的问题,而且所有这些产品都或多或少地提供了电源转换功能,并满足您的大部分需求。接下来您如何决定哪一款是适合您设计的最佳产品?对于您开发和生产的最终产品,您的客户重视的是什么?哪些DC/DC稳压器参数决定了性能?

  在您进行选择时,请记着另一个参数:研究每一款DC/DC稳压器的可靠性报告。注意那些经过严格测试、以及由性能和可靠性声誉卓著的公司生产的产品。

  既然我们在探讨密封的DC/DC系统,那么本篇使用说明将仔细研究凌力尔特公司对其DC/DC微型模块(µModule)稳压器产品所做的深入和详尽的可靠性测试(图1)。您在以下网址可以看到完整的可靠性测试报告:

图1:DC/DC微型模块稳压器是一种含有电感器和具有高可靠性的密封型完整电路

  图2a:DC/DC微型模块产品的可靠性测试报告

  图2b:DC/DC微型模块产品可靠性测试报告中的一个详尽的测试例子

  一系列免费可供参考的测试资料

  总共就DC/DC微型模块产品进行了18项测试,其中有几项测试是在不同温度情况下进行的。这些数据是累计的,即自这些产品3年半以前推出以来,凌力尔特公司一直在监视和更新这些数据。凌力尔特公司严格更新这份报告,而且可在线提供报告副本。要求报告副本并无需满足任何特殊要求。凌力尔特公司以这种方式支持其高性能微型模块产品线,其中包括DC/DC系列(除了DC/DC产品,还提供混合信号微型模块器件,如LTM9003和LTM2881)。

  剖析DC/DC微型模块稳压器的可靠性测试报告

  需要特别提到的第一件事是,微型模块产品的可靠性测试显示,故障为零。

  尽管这个数字非常好,但是凌力尔特公司还是会继续监视不同型号和不同封装尺寸器件的生产记录,直到遇到一个或多个故障为止,如果出现故障,将产生一份分析故障原因的测试报告。迄今为止积累的这类数据证明了微型模块产品的封装、组装和电气性能的坚固性。

  该报告包含以下测试:

  1.工作寿命

  2.预处理

  3.温度、湿度偏置

  4.电源周期

  5.温度周期(各种不同的温度范围)

  6.热冲击(各种不同的温度范围)

  7.焊接冲击

  8.高温烘烤(各种不同的温度范围)

  9.机械冲击

  10.可变振动频率

  11.电路板安装/温度周期(各种不同的温度范围)

  凌力尔特公司仍然对这些测试结果进行持续监视,而且每个季度都会更新一次数据,然后在网上提供新的测试报告。

  以下是每次就DC/DC微型模块产品进行的可靠性测试的简短描述:

  1.工作寿命1,635,385器件小时,零故障

  a.用该产品在测试环境下的绝对最大电压额定值偏置后进行测试

  b.将环境温度提高到125oC以加速测试

  2.预处理2,500,608器件小时,零故障

  a.按照JEDEC245ºC标准(J-STD-020湿度等级3)进行192小时的30ºC/60%相对湿度+3次IR回流焊

  b.模拟电路板装配条件

  c.具有更为潮湿环境

  d.查看封装完整性和脱层

  3.温度、湿度偏置446,400器件小时,零故障

  a.查看枝晶生长和腐蚀情况

  b.在潮湿环境中施加数值为被测产品最大额定电压的偏压

  4.电源周期18,575,540器件小时,零故障

  a.通过接通和断开对产品进行测试

  b.结温范围为50ºC至100ºC

  5.温度周期-40ºC至125ºC1,078,000器件小时,零故障

  6.温度周期-55ºC至125ºC4,406,436器件小时,零故障

  7.温度周期-65ºC至125ºC7,402,790器件小时,零故障

  a.在多种尺寸的封装上进行

  b.空气对空气或室

  c.在500和1,000个读出点上,对器件进行电气完整性测

  8.热冲击-55ºC至125ºC4,648,000器件小时,零故障

  9.热冲击-65ºC至150ºC5,818,300器件小时,零故障

  10.热冲击-40ºC至125ºC733,000器件小时,零故障

  a.热液体至冷液体浸浴测试(图3)

  b.遵照J-STD-020LEVEL3标准

  c.在两个终点(500和1,000次循环)之后进行电测试

图3:热冲击浴槽系统

  11.焊接冲击245ºC2,278个单位样本规模,零故障

  a.浸入熔化的焊料中;

  b.浸没10秒钟。

  12.高温烘烤175ºC154,000器件小时,零故障

  13.高温烘烤150ºC3,202,874器件小时,零故障

  a.验证封装连接线上金属间化合的生长

  b.1,000小时后进行封装连接线牵拉测试

  c.不同的封装连接线厚度和长度

  d.牵拉以记录断裂模式

  e.监视500和1,000小时的情况

  14.机械冲击

  a.1,500g峰值冲击测试

  b.按照JESD22B104条件B

  15.可变振动频率

  a.20g峰值加速度

  b.按照JESD22B103条件A

  16.菊花链式电路板安装/温度周期211,500器件周期,零故障

  a.对焊料接合完整性进行测试(图4)

  b.0ºC至100ºC,具实时监视的菊花链单元

  c.在菊花链电路板上执行测试

图4:菊花链监视器测试单元

  17.电路板安装/温度周期-40ºC至125ºC1,689,000器件周期,零故障

  18.电路板安装/温度周期-55ºC至125ºC211,500器件周期,零故障

  a.焊料接合完整性测试

  b.在ATE(图4)或在工作台上接受测试

  不是每一位系统设计师都选择或需要高端、高可靠性DC/DC稳压器。这些产品的高性能导致的额外成本常常令设计师们望而却步。那么有时会忘记的一件事是,设计师花费了大量的时间和资源来完善系统复杂的数字组成部分,之后却不知道如何为该设计选择合适的DC/DC稳压器。当务之急是,仔细研究厂商的可靠性测试方法,以避免以后需要修改设计并花力气调试电路板的电源管理部分,这会造成很大的损失。信任厂商是正常的,但是除了解FIT率和表面数字外,验证和比较可靠性数据是明智的。必须询问详细信息。

  凌力尔特公司为其DC/DC微型模块稳压器产品提供极其详细的可靠性测试结果。可靠性报告每季度更新,并包括不同封装尺寸、批次和不同产品的测试数据。这份可靠性测试报告非常易于理解:它是在线提供的,所有想查看的人都可以得到,而且无需许可就可阅读。对于那些想尽力提供富有竞争力产品的系统设计师来说,选择一个由严格和系统化的可靠性测试计划支持的高端DC/DC稳压器,将确保良好的系统级可靠性以及在最终用户那里有良好的产品信誉。

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