<div class="document"> <p 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;"> </p> <p 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;"> </p> <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"><p 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;"> </p> <p 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;">使用了TPA3116D级功放，NE5532作为前级，3.5mm音频输入与蓝牙二合一的双模功放。</p> <p 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;"> </p> <p 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;">本PCB为TPA3116预留了所有可调整的pin config，可通过调整AM接口调整不同的PWM频率，调整电位器阻值可调整增益，以及通过调整跳帽来切换单声道和双声道输出。</p> <p 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;"> </p> <p 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;">用了两块LM3915作为电平指示灯，分别对应左右两声道。根据音频的大小不同会亮不同数量的灯。</p> <p 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;"> </p> <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"><p 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;"> </p> <p 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;">本项目致敬柴工的<span style="font-size:16px;">【课程设计】TPA3116+M18蓝牙数字功放，链接为：<a href="/winton/d-lei-shuo-zi-gong-fang" target="_blank">https://oshwhub.com/winton/d-lei-shuo-zi-gong-fang</a></span></p> <p>在此之上添加了一些TPA3116的功能，例如FAULTZ检测（过流和高温自动断电），增益选择和PWM频率选择。</p> <p>原理图主要参考了TI的TPA3116官方文档绘制，电路布局时自己摆的，还有一些优化空间。</p> <p 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;"> </p> <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"><p style="line-height:1.8;"> </p> <p style="line-height:1.8;">开源协议为Public Domain，各位电子爱好者们可以直接拿去DIY（虽然说画的不是很好）</p> <p 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;"> </p> <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"><p 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;"> </p> <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;">使用了TPA3116作为D类功放。TPA3116是TI的一款高性能数字功放IC，可以以最高50W双路输出/100W单路输出（at 4Ω）</li> </ul><p 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;"> </p> <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;">输入电源为4.5 ~ 26V, 8A，接口为DC-005或者用接线pin。由于输入电流较大，故需使用24AWG/0.5mm或更粗的线连接。</li> </ul><p 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;"> </p> <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;">输出方面，喇叭的阻抗建议在3.2 ~ 8Ω之间。在4Ω时输出达到最大。</li> </ul><p 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;"> </p> <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;">本PCB为TPA3116预留了所有可调试的功能，可以通过不同的跳帽连接的方法调试不同的PWM频率，不同的增益等等。高自由度的反复调试可以使芯片在最优状  态下运行，从而得到最佳的音质。本电路板也可以当作方案验证模块使用。</li> </ul><p 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;"> </p> <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;">运用多个电容对输出进行滤波，使输出信号更加纯净，从而获得更加干净的音质。</li> </ul><p 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;"> </p> <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;">TPA3116周围预留了25mm×25mm的空间用于安装散热片。</li> </ul><p 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;"> </p> <p 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;"><span style="font-size:18px;"><strong>4.1 PWM频率选择</strong></span></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/qeqBRB2WNG5O4GqGiz01JiJrL2WRQXv0Qqx4UKFF.png" alt="qeqBRB2WNG5O4GqGiz01JiJrL2WRQXv0Qqx4UKFF.png"></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;">以上为PWM选择电路，AM0，AM1，AM2处设有跳帽，可以通过连接不同跳帽来选择不同的PWM频率。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;">不同的PWM频率会影响到音质。下表为AM接口和频率的关系（0为断开，1为短接）：</p> <table style="border-collapse:collapse;width:97.3289%;height:88px;"><tr style="height:22px;"><td style="width:18.7919%;text-align:center;height:22px;"><strong>AM0</strong></td> <td style="width:18.7919%;height:22px;text-align:center;">0</td> <td style="width:18.7919%;height:22px;text-align:center;">0</td> <td style="width:18.7919%;height:22px;text-align:center;">0</td> <td style="width:18.795%;height:22px;text-align:center;">1</td> </tr><tr style="height:22px;"><td style="width:18.7919%;text-align:center;height:22px;"><strong>AM1</strong></td> <td style="width:18.7919%;height:22px;text-align:center;">0</td> <td style="width:18.7919%;height:22px;text-align:center;">0</td> <td style="width:18.7919%;height:22px;text-align:center;">1</td> <td style="width:18.795%;height:22px;text-align:center;">0</td> </tr><tr style="height:22px;"><td style="width:18.7919%;text-align:center;height:22px;"><strong>AM2</strong></td> <td style="width:18.7919%;height:22px;text-align:center;">0</td> <td style="width:18.7919%;height:22px;text-align:center;">1</td> <td style="width:18.7919%;height:22px;text-align:center;">0</td> <td style="width:18.795%;height:22px;text-align:center;">0</td> </tr><tr style="height:22px;"><td style="width:18.7919%;text-align:center;height:22px;"><strong>Frequency (KHz)</strong></td> <td style="width:18.7919%;height:22px;text-align:center;">400</td> <td style="width:18.7919%;height:22px;text-align:center;">500</td> <td style="width:18.7919%;height:22px;text-align:center;">1000</td> <td style="width:18.795%;height:22px;text-align:center;"> <p>1200</p> </td> </tr></table><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"> </p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"><span style="font-size:18px;"><strong>4.2 增益选择</strong></span></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/2Hy0V6eI6v0zv9NWUdp85LVSCFDWs6zV3XcE77r1.png" alt="2Hy0V6eI6v0zv9NWUdp85LVSCFDWs6zV3XcE77r1.png"></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;">以上为增益调节电路。R3为电位器，可以用螺丝刀旋转调节到合适位置来调整想要的增益</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;">下面为几个参考值：</p> <table style="border-collapse:collapse;width:97.3289%;"><tr><td style="width:23.7864%;text-align:center;"><strong>R3</strong></td> <td style="width:23.7864%;text-align:center;">5.6k</td> <td style="width:23.7864%;text-align:center;">20k</td> <td style="width:23.7864%;text-align:center;">39k</td> </tr><tr><td style="width:23.7864%;text-align:center;"><strong>R5</strong></td> <td style="width:23.7864%;text-align:center;">NC</td> <td style="width:23.7864%;text-align:center;">100k</td> <td style="width:23.7864%;text-align:center;">100k</td> </tr><tr><td style="width:23.7864%;text-align:center;"><strong>Gain (dB)</strong></td> <td style="width:23.7864%;text-align:center;">20</td> <td style="width:23.7864%;text-align:center;">26</td> <td style="width:23.7864%;text-align:center;">32</td> </tr></table><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"><span style="font-size:18px;"><strong>4.3 电路保护</strong></span></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/KQRIUA2YOYYS4IET6qX7FbbqIgwNZBLVI1IypfZw.png" alt="KQRIUA2YOYYS4IET6qX7FbbqIgwNZBLVI1IypfZw.png"></p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;">以上为TPA3116官方手册上的参数。当检测到短路或温度高于150℃时，FAULTZ会被拉低，因此输出的阻抗会提高，从而保护电路。本设计预留了25mm×25mm的散热区域，和芯片充分接触后会达到较好的散热效果。注意：大功率运行时必须安装适合的散热片。</p> <p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"> </p> <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"><p 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;"> </p> <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;">本项目为纯模拟电路，无需软件。</li> </ul><p 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;"> </p> <p 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;">即：<strong>插上电就可以用。</strong></p> <p 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;"> </p> <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;">不过蓝牙的话要配对一下。虽说是蓝牙模块，但是按键实现不同功能是用不同阻值串联上去的电阻决定的。</li> </ul><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"> </p> <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"><p 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;"><span style="color:#95a5a6;font-size:14px;">请输入内容…</span></p> <p 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;"> </p> <p 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;"><span style="color:#95a5a6;font-size:14px;">注：项目涉及的BOM清单。这个位置请上传BOM的截图。清单详情请以PDF的格式上传到附件中。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。</span></p> <p 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;"> </p> <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"><p style="line-height:1.8;"> </p> <p 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;"><span style="color:#95a5a6;font-size:14px;"><span style="text-decoration:underline;"><a href="https://lceda.oss-cn-shenzhen.aliyuncs.com/diy/uploads/file/2019/05/29/0e4d93a463d7ceb5e7dc77d774b7a4ae.zip" target="_blank">（大赛标识）.zip</a></span></span></p> <p 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;">JLC，YYDS！既然都可以白嫖了当然把标识贴正面。</p> <p 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;"> </p> <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"><p style="line-height:1.8;"> </p> <p 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;"><span style="color:#95a5a6;font-size:14px;">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；</span></p> <p 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;"><span style="color:#95a5a6;font-size:14px;">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。</span></p> <p 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;"> </p> <p 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;"><span style="font-size:14px;">更多详情：<a href="/posts/06c94d90c2c447dfbd9ed7339ff4a5b1" target="_blank">https://diy.szlcsc.com/posts/06c94d90c2c447dfbd9ed7339ff4a5b1</a></span></p> <p 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;"> </p> </div>