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无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516

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<p>传统AB类音频功放效率一般是55%左右。 用常规的芯片封装输出功率超过5W就容易出现过热保护。必须外加散热器才能正常使用。特别是AM/FM等收音机厂家既要把功率做大又要保证收音机接收效果，迫于无奈只能这样处理。因为AB类音频功放对收音机接收效果是零干扰。传统的AB类音频功放芯片如TEA2025/KA2206/TDA2030需外加散热器是人工后焊工序，必然会影响生产效率以及直通率，还有产品外壳设计的局限性。</p>

<p><span><strong><span>深圳市永阜康科技有限公司</span></strong></span><span><span>针对收音机、车载音响的应用需求，推广这一款无需散热器，内置防破音<span lang="EN-US">AB</span>类<span lang="EN-US">/D</span>类切换单声道<span lang="EN-US">20W</span>音频功放<span lang="EN-US">IC_CS8516</span>。<span lang="EN-US">CS8516</span>在<span lang="EN-US">AB</span>类工作模式在<span lang="EN-US">12V</span>供电时无需外加散热器可持续输出<span lang="EN-US">20W</span>功率，效率比传统的<span lang="EN-US">AB</span>类功放高<span lang="EN-US">5%</span>以上；其<span lang="EN-US">5V-15V</span>宽电压供电满足双节<span lang="EN-US">/</span>三节锂电及<span lang="EN-US">12V</span>铅酸电池的应用；根据不同喇叭腔体三种防破音可选，满足不同市场的音质需求；扩频工作模式方便<span lang="EN-US">EMI</span>认证测试；输出无滤波节省外围成本；采用高效<span lang="EN-US">EQA16</span>贴片封装提高生产效率，实现<span lang="EN-US">PCBA</span>小型化。</span></span></p>

<p><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="45681c4b-b6e8-48b3-a418-982fd2ecd1d1" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192793-1.jpg&…; /></p>

<p><span><span lang="EN-US">AB</span></span><span><span>类音频功放属于线性放大器，对于音频信号失真度，还原度相对<span lang="EN-US">D</span>类音频功放先天有优势或者易于设计处理。所以一般<span lang="EN-US">AB</span>类音频功放的听感偏暖，偏柔和，相对舒适。<span lang="EN-US">D</span>类音频功放一般声音都偏硬，尖锐，偏吵！所以在一些电源直供，对音质要求较高的应用场合<span lang="EN-US">CS8516</span>是理想的选择。</span></span></p>

<p><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="420a8cca-69e3-4074-bd41-d685fb809617" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192795-2.jpg&…; /></p>

<p><span><span>音频功放的防破音功能现已非常成熟，对于音频响应动态范围，适应不同的音频信号源，以及音质听觉感受有明显作用。然而电源电压<span lang="EN-US">9V</span>以上的音频功放内置防破音功能型号市面少之又少。<span lang="EN-US">CS8516</span>内置防破音功能，<span lang="EN-US">12V</span>左右供电最大程度发挥其音质效果。</span></span><span><span lang="EN-US"> </span></span></p>

<p><span><span lang="EN-US"><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="969f0df0-e751-404b-8a5e-5de54b99a193" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192796-3.jpg&…; /></span></span></p>

<p><span><span lang="EN-US">CS8516</span></span><span><span>应用特性</span></span></p>

<p><span><strong><span>描述</span></strong></span></p>

<p><span><span>输出功率</span></span></p>

<p><span><span lang="EN-US">PO&nbsp; &nbsp;at&nbsp; 10% THD+N, PVDD = 15V</span></span></p>

<p><span><span lang="EN-US">RL = 4 Ω&nbsp; &nbsp;30W(D MODE NCN OFF</span></span><span><span>）</span></span></p>

<p><span><span lang="EN-US">PO&nbsp; &nbsp;at&nbsp; 10% THD+N, PVDD = 12V</span></span></p>

<p><span><span lang="EN-US">RL = 3 Ω&nbsp; &nbsp;25W(D MODE NCN OFF</span></span><span><span>）</span></span></p>

<p><span><span lang="EN-US">PO&nbsp; &nbsp;at&nbsp; 10% THD+N, PVDD = 12V</span></span></p>

<p><span><span lang="EN-US">RL = 4 Ω&nbsp; &nbsp;19W(AB MODE</span></span><span><span>）</span></span></p>

<p><span><strong><span lang="EN-US">AB</span></strong></span><span><strong><span>类使用的最高电压不得超过<span lang="EN-US">12V,</span>负载不得低于<span lang="EN-US">4Ω</span></span></strong></span></p>

<p><span><span lang="EN-US">PO&nbsp; &nbsp;at&nbsp; 10% THD+N, PVDD = 9V</span></span></p>

<p><span><span lang="EN-US">RL = 2Ω &nbsp;20W(D MODE NCN OFF</span></span><span><span>）</span></span></p>

<p><span><span>优异的<span lang="EN-US">"</span>噼噗<span lang="EN-US">-</span>咔嗒<span lang="EN-US">"(pop-noise)</span>杂音抑制能力</span></span></p>

<p><span><span>工作电压范围：<span lang="EN-US">5V</span>到<span lang="EN-US">15V</span></span></span></p>

<p><span><span>扩频功能</span></span></p>

<p><span><span>固定<span lang="EN-US">64</span>倍增益，集成<span lang="EN-US">10K</span>输入电阻<span lang="EN-US">,640K</span>反馈电阻</span></span></p>

<p><span><span>内置三种防破音模式</span></span></p>

<p><span><span>无需滤波的<span lang="EN-US">Class-D</span>结构</span></span></p>

<p><span><span>最高<span lang="EN-US">93%</span>的效率<span lang="EN-US">(PVDD=12V)</span></span></span></p>

<p><span><span>高电源抑制比<span lang="EN-US">(PSRR)</span>：在<span lang="EN-US">217Hz</span>下为<span lang="EN-US">70dB</span></span></span></p>

<p><span><span>启动时间<span lang="EN-US"> (200ms)</span></span></span></p>

<p><span><span>静态电流<span lang="EN-US">&nbsp;&nbsp; (18mA)</span></span></span></p>

<p><span><span>低关断电流<span lang="EN-US"> (1µA)</span></span></span></p>

<p><span><span>过流保护，短路保护和过热保护</span></span></p>

<p><span><span lang="EN-US">1. CS8516</span></span><span><span>脚位图以及管脚说明</span></span><span><span lang="EN-US"> </span></span></p>

<p><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="82a3276b-5ff9-44dd-9154-a1f0a7d44ea5" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192798-4.jpg&…; /></p>

<p><span><span lang="EN-US">2. CS8516</span></span><span><span>音频功放<span lang="EN-US">+CS5095 USB 5V</span>三节锂电充电管理应用原理图</span></span></p>

<p><span><span>说明</span></span></p>

<p><span><span>基于<span lang="EN-US">CS8516</span>音频功放<span lang="EN-US">+CS5095 USB5V</span>三节锂电充电管理组合解决方案。采用<span lang="EN-US">3</span>节锂电池串联<span lang="EN-US">12.6V</span>做电源；功放芯片采用<span lang="EN-US">CS8516,</span>实现<span lang="EN-US">20W/4</span>欧单声道功率输出；充电采用<span lang="EN-US">CS5095E</span>，<span lang="EN-US">5V</span>输入给三节锂电池串联充电，省掉充电的适配器，无需<span lang="EN-US">3C</span>认证。</span></span><span><span lang="EN-US"> </span></span></p>

<p><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="e3d95c47-8f60-420a-9e90-a6c1a5a5cd5e" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192799-5.jpg&…; /></p>

<p><span><span lang="EN-US">3.</span></span><span><span lang="EN-US"> CS8516</span></span><span><span>音频功放</span></span><span><span lang="EN-US">+CS5095 USB5V</span></span><span><span>三节锂电充电管理一体演示<span>板</span></span></span><span><span lang="EN-US">PCB</span></span><span><span>顶层设计图</span></span><span><strong><span lang="EN-US"> </span></strong></span></p>

<p><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="6c645163-2178-46f6-bf57-877c1bb046b6" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192800-6.jpg&…; /></p>

<p><span><span lang="EN-US">4. </span></span><span><span lang="EN-US">CS8516</span></span><span><span>音频功放</span></span><span><span lang="EN-US">+CS5095 USB5V</span></span><span><span>三节锂电充电管理一体演示<span>板</span></span></span><span><span lang="EN-US">PCB</span></span><span><span>底层设计图</span></span><span><span lang="EN-US"> </span></span></p>

<p><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="2817e31d-6de4-420d-848e-28d69f2af4f2" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192801-7.jpg&…; /></p>

<p><span><span lang="EN-US">5. </span></span><span><span lang="EN-US">CS8516</span></span><span><span>音频功放</span></span><span><span lang="EN-US">+CS5095 USB5V</span></span><span><span>三节锂电充电管理一体演示<span>板</span></span></span><span><span>贴片图</span></span><span><span lang="EN-US"> </span></span></p>

<p><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="061491c4-6982-46d4-bd61-2543e60dabdd" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192803-8.jpg&…; /></p>

<p><span><span lang="EN-US">6.</span></span><span><span lang="EN-US"> CS8516</span></span><span><span>音频功放</span></span><span><span lang="EN-US">+CS5095 USB5V</span></span><span><span>三节锂电充电管理一体演示</span></span><span><span>板物料清单</span></span><span><span lang="EN-US"> </span></span></p>

<p><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="0895e2ea-b869-4a64-89c5-3ec7055ec5b6" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192804-9.jpg&…; /></p>

<p><span><span lang="EN-US">7. CS8516</span></span><span><span>音频功放</span></span><span><span lang="EN-US">+CS5095 USB5V</span></span><span><span>三节锂电充电管理一体演示<span>板</span>实物图</span></span></p>

<p><img alt="无需散热器，内置防破音AB类/D类切换单声道20W音频功放IC_CS8516" data-entity-type="file" data-entity-uuid="b0740405-d79c-4e8e-90db-e302330d4990" src="http://new.eetrend.com/files/2021-04/wen_zhang_/100099161-192806-10.png…; /></p>