https://www.knightli.com/tags/dc-dc%E9%99%8D%E5%8E%8B/ Recent content in DC-DC降压 on KnightLi的博客 Hugo -- gohugo.io zh-cn Thu, 28 Apr 2022 00:00:00 +0000 https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/ Thu, 28 Apr 2022 00:00:00 +0000 https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/ <h2 id="华为-pw22arab-pw22asab">华为 PW22ARAB, PW22ASAB </h2><p>这俩模块构造不太一样，数据基本一致，海鲜市场价格大概几块钱一个（买一大块板回来自己拆价格更便宜，12块钱4个）。华为通讯设备上的。<br> 拆华为pw22用钳子夹住en脚慢慢往上抬就行，煤气灶烧烤拆也不错，掌握好火候不会掉铜脚。烙铁很难拆下来，风枪容易掉件。 <img src="https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/1.jpeg" width="400" height="390" srcset="https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/1_hu_a450eb3a5107d5e9.jpeg 480w, https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/1_hu_82706b6e728c5983.jpeg 1024w" loading="lazy" class="gallery-image" data-flex-grow="102" data-flex-basis="246px" ></p> <h3 id="效率">效率 </h3><p>输入：12V；输出：5V</p> <table> <thead> <tr> <th>输出电流</th> <th>1A</th> <th>5A</th> <th>10A</th> <th>15A</th> <th>20A</th> <th>25A</th> <th>27A</th> </tr> </thead> <tbody> <tr> <td>效率</td> <td>88.8%</td> <td>94.7%</td> <td>93.12%</td> <td>90.77%</td> <td>88%</td> <td>84.4%</td> <td>过流保护</td> </tr> </tbody> </table> <p>2-15A的范围内，效率都较高，能到90%以上。空载功耗大了点，约1.5W，所以这也是低负载的效率低了点的原因，同时发热也有点大。</p> <h3 id="参考接线图">参考接线图 </h3><p><img src="https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/2.jpeg" width="394" height="400" srcset="https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/2_hu_3c1d3810e6c9e58a.jpeg 480w, https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/2_hu_966db12084e86117.jpeg 1024w" loading="lazy" class="gallery-image" data-flex-grow="98" data-flex-basis="236px" ></p> <p>调压的可调电阻串在地和TRIM之间即可，可调范围大概0-5.5V，输入最高14V。 TRIM电阻的常见阻值可选择2.7KΩ（对应输出为5V）、4.42KΩ（对应输出为3.3V），其它电压请自行测试。</p> <h2 id="中兴zxdn10">中兴ZXDN10 </h2><p>这是个极小的模块，海鲜市场价格大概1.5元一个. 中兴通讯设备上的。<br> <img src="https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/3.jpeg" width="400" height="323" srcset="https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/3_hu_69e45b6119de461b.jpeg 480w, https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/3_hu_87ea07cccca397eb.jpeg 1024w" loading="lazy" class="gallery-image" data-flex-grow="123" data-flex-basis="297px" ></p> <h3 id="效率-1">效率 </h3><p>输入：12V；输出：5V</p> <table> <thead> <tr> <th>输出电流</th> <th>1A</th> <th>2A</th> <th>3A</th> <th>4A</th> <th>5A</th> <th>6A</th> <th>7A</th> <th>8A</th> <th>9A</th> <th>10A</th> <th>11A</th> <th>12A</th> </tr> </thead> <tbody> <tr> <td>效率</td> <td>92.2%</td> <td>94.8%</td> <td>94.3%</td> <td>93.96%</td> <td>93.58%</td> <td>93.29%</td> <td>92.8%</td> <td>92.24%</td> <td>91.60%</td> <td>91.00%</td> <td>90.2%</td> <td>保护</td> </tr> </tbody> </table> <p>由上表可知在功率允许的范围内，低负载效率比上面华为的还高。</p> <h3 id="参考接线图-1">参考接线图 </h3><p><img src="https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/4.jpeg" width="400" height="270" srcset="https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/4_hu_2c45879c9368000c.jpeg 480w, https://www.knightli.com/2022/04/28/%E4%BA%8C%E6%89%8B-dc-%E9%9D%9E%E9%9A%94%E7%A6%BB-12v-5v-%E9%99%8D%E5%8E%8B%E6%A8%A1%E5%9D%97/4_hu_42f89a01e69c201c.jpeg 1024w" loading="lazy" class="gallery-image" data-flex-grow="148" data-flex-basis="355px" ></p> <p>网上有些说法（包括海鲜卖家）会告诉你调压的电阻需要接在输出和地之间，但其实只要串在调节和地之间即可。 TRIM电阻的常见阻值可选择100Ω（对应输出为5V），其它电压烦请自行测试。</p>