兼容USB PD快充输入单节锂电池2A充电方案IC ，1号测试板

<p><strong>1号电路板P</strong><strong>CB</strong><strong>描述： </strong></p><p class="image-package"><img class="uploaded-img" src="https://upload-images.jianshu.io/upload_images/28174433-c77ccd9baacf1295.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240" width="auto" height="auto"/><strong>1.1</strong><strong>  </strong><strong>名称：兼容</strong><strong>USB PD</strong><strong>快充输入单节锂电池2</strong><strong>A</strong><strong>充电方案I</strong><strong>C</strong><strong> </strong></p><p class="image-package"><img class="uploaded-img" src="https://upload-images.jianshu.io/upload_images/28174433-3934f2141f9fc9d2.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240" width="auto" height="auto"/><strong>1.2</strong><strong>  </strong><strong>应用：便捷充电设备等</strong><strong> </strong></p><p><strong>1.</strong><strong>3  </strong><strong>电池组：3.7</strong><strong>V</strong><strong>锂电池组，多并或单串，充满4.2</strong><strong>V</strong></p><p><strong>1.4</strong><strong>  </strong><strong>输入电压：5</strong><strong>V-</strong><strong>9</strong><strong>V   </strong><strong>（充电亮灯，充满转灯，不接电池是闪灯）</strong></p><p><strong>1.5 </strong><strong> M</strong><strong>ax充电电流：2</strong><strong>A </strong></p><p><strong>1.6芯片功能简介：</strong></p><p><strong>1， </strong><strong>锂电池充电电路：</strong>PW4052</p><p>PW4052锂电池充电管理芯片，可达2.5A充电电流，开关式高效率，支持1节锂电池充电。</p><p><strong>2， </strong><strong>D</strong><strong>C-DC</strong><strong>同步降压电路：</strong>PW2303</p><p>PW2303 同步降压芯片，输入9V-5V，输出5V，可达3A，特点降压压差很低，效率高。</p><p><strong>3， </strong><strong>USB</strong><strong> </strong><strong>C</strong><strong>口 </strong><strong>PD</strong><strong>快充协议芯片：</strong>PW6603</p><p>PW6603 是PD快充协议芯片，SINK端，负责协议通讯PD充电器使输出其指定的电压。</p><p>
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