【科普小贴士】MOSFET的性能：漏极电流和功耗

<p>允许损耗和漏极电流是MOSFET的典型最大额定值，计算如下。<br />
（有些产品采用了不同的电流表达式。）<br />
通过热阻和结温来计算功耗。漏极电流将采用欧姆定律，由计算得出的功耗和导通电阻进行计算。</p>

<p><strong>P_D：功耗</strong></p>

<p>⇒&nbsp;器件指定温度条件下允许的功耗</p>

<p><img alt="功耗" data-entity-type="file" data-entity-uuid="c7a57dca-f3fc-4ed3-b227-148bdd0648d8" src="/sites/default/files/inline-images/%E5%8A%9F%E8%80%97.png" /></p>

<p><strong>I_D：漏极电流</strong></p>

<p>⇒直流额定值：正向流动的直流电流。（在室温下定义）</p>

<p><img alt="漏极电流" data-entity-type="file" data-entity-uuid="4d3997f9-0121-48cc-ba3f-499880734c11" src="/sites/default/files/inline-images/%E6%BC%8F%E6%9E%81%E7%94%B5%E6%B5%81.png" /></p>

<p><strong>I_Dp：脉冲漏极电流</strong></p>

<p>⇒指定脉宽下的最大漏极电流。一般是直流电流的4倍。</p>

<p><img alt="脉冲漏极电流" data-entity-type="file" data-entity-uuid="e92f0b50-11f7-4584-8ad5-a83ec287ab20" src="/sites/default/files/inline-images/%E8%84%89%E5%86%B2%E6%BC%8F%E6%9E%81%E7%94%B5%E6%B5%81.png" /></p>

<p>文章来源：<a href="https://toshiba-semicon-storage.com/cn/semiconductor/knowledge/e-learni…;