#第九届立创电赛#DCDC降压模块 - 立创电子设计大赛

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<div class="document"> 注：* 为必填项 请在报名阶段填写 ↓ <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">* 1、项目功能介绍</h3> <hr class="horizontal-splitline normal-bold-2"> DCDC降压模块，支持3.8V-30V输入，输出5V和3.3V。 方便将电池通过降压给单片机供电，以维持单片机脱机长时间运行，便于更换电源。 通过 TPS62932DRLR降压芯片对输入电压降压为5V，再由AMS1117-3.3降压至3.3V，结合电路设计输出稳定的电压输出。 <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*2、项目属性</h3> <hr class="horizontal-splitline normal-bold-2"> 项目首次公开，为原创项目，未参加其他比赛，非毕业/课程设计。 <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">* 3、开源协议</h3> <hr class="horizontal-splitline normal-bold-2"> GPL3.0 请在竞赛阶段填写 ↓ <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*4、硬件部分</h3> <hr class="horizontal-splitline normal-bold-2"> 电路图: <img src="//image.lceda.cn/pullimage/VlBhteQV5HAvJB8ReEzR6sOYynsCEGl6OM855afn.png"> PCB: <img src="//image.lceda.cn/pullimage/ulo2bGYDe75aBT7g57HdSfdnoP47Ludr7Ycn53bj.png"> <img src="//image.lceda.cn/pullimage/mUjKGInuKsbcTL8IJhMnW61FZxzr9xHMnmlvRuP9.png"> 项目实现原理和机制 模块通过 TPS62932DRLR降压芯片对输入电压降压为5V，再由AMS1117-3.3降压至3.3V，结合电路设计输出稳定的电压输出。 <ul> <li class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">开关SW1控制整个系统开关</li> <li class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">Cin1和Cinx对输入电源进行滤波处理以得到稳定电源电压</li> <li class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">TPS62932DRLR进行第一次电源降压处理</li> </ul> TPS62932DRLR引脚功能如下: <img src="//image.lceda.cn/pullimage/YKEDICL27aAR6u3iKrrDLvVoTdyncQCqVfH1zTXF.png"> <img src="//image.lceda.cn/pullimage/jNIyQ4LLFD9wusfV5nHgVqMyZVMOvj8oJP3PJEym.png"> 详见TI公司数据参考手册:<a href="https://www.ti.com.cn/cn/lit/gpn/tps62932" target="_blank">TPS6293x 采用 SOT583 封装的 3.8V 至 30V、2A/3A 同步降压转换器数据表 (Rev. D)</a> 电路设计说明: <ol> <li style="list-style-type: none;"> <ol> <li style="list-style-type: none;"> <ol> <li style="list-style-type: none;"> <ol> <li>RT,EN浮空</li> <li>VIN接入电源输入</li> <li>SS串联33nF用于控制芯片启动</li> <li>BST与SW之间连接100nF优质陶瓷电容</li> <li>SW脚作为电源输出</li> <li>FB串联Rfbb和Rfbt作为输出电压控制，计算公式见下方</li> </ol> </li> </ol> </li> </ol> </li> </ol> <img src="//image.lceda.cn/pullimage/mpKdvFyfi8kdEYX16Ebb21DrPiv8DzOU6cxPiPpz.png"> <ul> <li>AMS1117-3.3为3.3V固定输出LDO降压</li> </ul> <ol> <li style="list-style-type: none;"> <ol> <li style="list-style-type: none;"> <ol> <li>VIN接入电源输入</li> <li>VOUT&TAB接入电源输出</li> <li>其余部分为电源滤波</li> </ol> </li> </ol> </li> </ol> <ul> <li>R1和LED1为电源指示，用于指示整个系统工作状态</li> </ul> 注意事项 <ul> <li>更改设计时应确保电路符合电气要求，确保整个系统工作在安全的状态下.</li> <li>上电前请检查整体电路完整性</li> <li>确保输入电压在 5V-30V 之间</li> </ul> 调试方法 <ul> <li>可将Rfbt更换为可调电阻,此时可通过调节Rfbt改变输出电压.</li> <li>接入可编程线性直流电源为其供电，通过示波器、万用表测量输出波形、输出电压.</li> <li>可见模块8视频部分</li> </ul> <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*5、软件部分</h3> <hr class="horizontal-splitline normal-bold-2"> 硬件电路，无软件部分 <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*6、BOM清单</h3> <hr class="horizontal-splitline normal-bold-2"> <table width="1470"> <tr> <td width="147" height="19">No.</td> <td width="147">Quantity</td> <td width="147">Comment</td> <td width="147">Designator</td> <td width="147">Footprint</td> <td width="147">Value</td> <td width="147">Manufacturer Part</td> <td width="147">Manufacturer</td> <td width="147">Supplier Part</td> <td width="147">Supplier</td> </tr> <tr> <td height="19">1</td> <td align="right">2</td> <td>10uF</td> <td>C1,C3</td> <td>C0805</td> <td>10uF</td> <td>CL21A106KPFNNNE</td> <td>SAMSUNG(三星)</td> <td>C17024</td> <td>LCSC</td> </tr> <tr> <td height="19">2</td> <td align="right">2</td> <td>100nF</td> <td>C2,C4</td> <td>C0201</td> <td>100nF</td> <td>GRM033R61A104KE15D</td> <td>muRata(村田)</td> <td>C76934</td> <td>LCSC</td> </tr> <tr> <td height="19">3</td> <td align="right">1</td> <td>100nF</td> <td>Cboot</td> <td>C0402</td> <td>100nF</td> <td>CC0402KRX7R6BB104</td> <td>YAGEO(国巨)</td> <td>C309458</td> <td>LCSC</td> </tr> <tr> <td height="19">4</td> <td align="right">1</td> <td>10pF</td> <td>Cff</td> <td>C0201</td> <td>10pF</td> <td>GRM0335C1E100FA01D</td> <td>muRata(村田)</td> <td>C710790</td> <td>LCSC</td> </tr> <tr> <td height="19">5</td> <td align="right">1</td> <td>10uF</td> <td>Cin</td> <td>C0805</td> <td>10uF</td> <td>CGA0805X5R106K350MT</td> <td>HRE(芯声)</td> <td>C6119888</td> <td>LCSC</td> </tr> <tr> <td height="19">6</td> <td align="right">1</td> <td>100nF</td> <td>Cinx</td> <td>C0603</td> <td>100nF</td> <td>CGA0603X7R104K500JT</td> <td>HRE(芯声)</td> <td>C6119867</td> <td>LCSC</td> </tr> <tr> <td height="19">7</td> <td align="right">1</td> <td>ZX-XH2.54-2PZZ</td> <td>CN1</td> <td>CONN-TH_2P-P2.50_HX25003-2A</td> <td> </td> <td>ZX-XH2.54-2PZZ</td> <td>Megastar(兆星)</td> <td>C7429632</td> <td>LCSC</td> </tr> <tr> <td height="19">8</td> <td align="right">1</td> <td>47uF</td> <td>Cout</td> <td>C1210</td> <td>47uF</td> <td>CS3225X7R476K160NRL</td> <td>SAMWHA(三和)</td> <td>C5440143</td> <td>LCSC</td> </tr> <tr> <td height="19">9</td> <td align="right">1</td> <td>33nF</td> <td>Css</td> <td>C0402</td> <td>33nF</td> <td>CC0402MRX7R6BB333</td> <td>YAGEO(国巨)</td> <td>C527022</td> <td>LCSC</td> </tr> <tr> <td height="19">10</td> <td align="right">3</td> <td>PZ254V-11-05P</td> <td>H1,H2,H3</td> <td>HDR-TH_5P-P2.54-V-M</td> <td> </td> <td>PZ254V-11-05P</td> <td>XFCN(兴飞)</td> <td>C492404</td> <td>LCSC</td> </tr> <tr> <td height="19">11</td> <td align="right">1</td> <td>10uH</td> <td>L1</td> <td>IND-SMD_L7.3-W6.8</td> <td>10uH</td> <td>FXL0630-100-M</td> <td>cjiang(长江微电)</td> <td>C167223</td> <td>LCSC</td> </tr> <tr> <td height="19">12</td> <td align="right">1</td> <td>LED_0603-R</td> <td>LED1</td> <td>LED_0603</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td height="19">13</td> <td align="right">1</td> <td>1K</td> <td>R1</td> <td>R0603</td> <td>1K</td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td height="19">14</td> <td align="right">1</td> <td>10kΩ</td> <td>Rfbb</td> <td>R0402</td> <td>10kΩ</td> <td>CRCW040210K0FKED</td> <td>VISHAY(威世)</td> <td>C71617</td> <td>LCSC</td> </tr> <tr> <td height="19">15</td> <td align="right">1</td> <td>52.3kΩ</td> <td>Rfbt</td> <td>R0603</td> <td>52.3kΩ</td> <td>0603WAF5232T5E</td> <td>UNI-ROYAL(厚声)</td> <td>C23198</td> <td>LCSC</td> </tr> <tr> <td height="19">16</td> <td align="right">4</td> <td>M2螺丝</td> <td>SCREW1,SCREW2,SCREW3,SCREW4</td> <td>M2螺丝</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td height="19">17</td> <td align="right">1</td> <td>SS-12D10L5</td> <td>SW1</td> <td>SW-TH_SS-12D10L5</td> <td> </td> <td>SS-12D10L5</td> <td>XKB Connectivity(中国星坤)</td> <td>C319012</td> <td>LCSC</td> </tr> <tr> <td height="19">18</td> <td align="right">1</td> <td>TPS62932DRLR</td> <td>U1</td> <td>SMD-8_L2.1-W1.2-P0.50-LS1.6-BL</td> <td> </td> <td>TPS62932DRLR</td> <td>TI(德州仪器)</td> <td>C3032935</td> <td>LCSC</td> </tr> <tr> <td height="19">19</td> <td align="right">1</td> <td>AMS1117-3.3</td> <td>U2</td> <td>SOT-223-4_L6.5-W3.5-P2.30-LS7.0-BR</td> <td> </td> <td>AMS1117-3.3</td> <td>UMW(友台半导体)</td> <td>C347222</td> <td>LCSC</td> </tr> </table> 注：项目涉及的BOM清单。在<a href="https://lceda.cn/editor" target="_blank">嘉立创EDA</a> 生成/上传设计文件后，BOM将自动生成至项目详情；建议包括型号、品牌、名称、封装、采购渠道、用途等内容。具体内容和形式应以表达清楚项目构成为准。 <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*7、大赛LOGO验证</h3> <hr class="horizontal-splitline normal-bold-2"> <img src="//image.lceda.cn/pullimage/gPdLKuEXPL9RU3fG4YAw4FXYzJeHrwh9gGwcsrJC.jpeg" alt="" width="3740" height="2804"> 请上传包含大赛logo的项目图片，logo以丝印形式印刷在PCB上面。 点击zip下载大赛logo标识！ <a href="https://image.lceda.cn/easyedaResource/images/d1bbfd69f9404f56901a0e7b849b7245.rar" target="_blank">（大赛标识）.zip</a> <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">* 8、演示您的项目并录制成视频上传</h3> <hr class="horizontal-splitline normal-bold-2"> <a title="立创电赛:DCDC降压模块-DCDC降压模块" href="https://www.bilibili.com/video/BV1inmLYhEjr/?share_source=copy_web&vd_source=bb5cf8fd3a910be6d036cbedaf99e8fa" target="_blank">立创电赛:DCDC降压模块-DCDC降压模块</a> 视频要求：请横屏拍摄，分辨率不低于1280×720，格式Mp4/Mov，单个视频大小限100M内； 视频标题：立创电赛：{项目名称}-{视频模块名称}；如立创电赛：《自动驾驶》-团队介绍。 <a href="/posts/de460543d4cf4dacb5f0326612455578" target="_blank">前往查看更多详情＞</a> </div>