<p><a href="http://www.analog.com/"><span lang="EN-US">Analog Devices, Inc.</span></a><span lang="EN-US"> (ADI)</span><span>，</span><span>今日宣布推出</span><span lang="EN-US">LT8491</span><span>降压</span><span lang="EN-US">-</span><span>升压电池充电控制器</span><span>，</span><span>该控制器具有最大功率点跟踪</span><span lang="EN-US">(MPPT)</span><span>、温度补偿和</span><span lang="EN-US">I2C</span><span>接口等特性</span><span>，</span><span>适用于遥测和控制。该器件的工作电压可高于、低于或等于经调节的电池浮充电压。</span><span>LT8491</span><span>提供三种可选的恒流恒压</span><span>(CC-CV)</span><span>充电曲线，因此非常适合为各种化学电池充电，包括密封铅酸电池、凝胶电池、溢流型电池和锂离子电池。所有充电终止算法均已内置，无需开发软件或固件，从而缩短设计周期。</span></p>
<ul>
<li><!--[endif]--><span>下载数据手册和</span><span lang="EN-US">“Linduino I2C</span><span>接口</span><span lang="EN-US">”</span><span>，</span><span>申请样片和订购评估板</span><span>：</span><a href="https://www.analog.com/cn/products/lt8491.html"><span lang="EN-US">http://www.analog.com/LT8491</span></a></li>
<li><!--[endif]--><span>通过在线技术支持社区</span><span lang="EN-US">EngineerZone™</span><span>联系工程师和</span><span lang="EN-US">ADI</span><span>产品专家</span><span>：</span><span><span lang="EN-US"><a href="http://ez.analog.com/"><span>http://ez.analog.com/power</span></a></spa…;
</ul>
<p><span>LT8491</span><span>在</span><span>6V</span><span>至</span><span>80V</span><span>的<span>输入电压</span>范围内工作，使用单个电感并配合</span><span>4</span><span>开关同步整流可以产生</span><span>1.3V</span><span>至</span><span>80V</span><span>的电池浮充电压输出。该器件能够提供高达</span><span>10A</span><span>的充电电流，具体取决于外部元件的选择。</span><span>LT8491</span><span>可以与多个</span><span>LT8705</span><span>（</span><span>80V</span><span>降压</span><span>-</span><span>升压控制器）器件并联，以提供更高的功率。</span></p>
<p><span><img alt="ADI公司推出集成最大功率点跟踪和I2C的80V降压-升压电池充电控制器" data-entity-type="file" data-entity-uuid="1a34b5ef-ce3f-4883-8cd1-c8493a3096d2" src="http://new.eetrend.com/files/2020-12/wen_zhang_/100059782-115824-1.jpg&…; /></span></p>
![http://new.eetrend.com/files/2020-12/wen_zhang_/100059782-115824-1.jpg&…](http://new.eetrend.com/files/2020-12/wen_zhang_/100059782-115824-1.jpg"){kind=link}
<p><span>LT8491</span><span>可以扫描太阳能电池板的完整工作范围，找到真正的最大功率点，即使电池板因部分阴影而引起局部最大值点也不会受到影响。一旦找到真正的最大功率点，</span><span>LT8491</span><span>将在该点工作，同时使用扰动技术跟踪最大点的缓慢变化。通过这些方法，即使在非理想的工作环境中，</span><span>LT8491</span><span>也能充分利用太阳能电池板产生的几乎所有功率。</span></p>
<p><span>LT8491</span><span>可通过检测热耦合到电池的外部热敏电阻来执行自动温度补偿。通过</span><span>I2C</span><span>接口可以完全控制充电器以及输入</span><span>/</span><span>输出电压、电流和功率值。</span><span>LT8491</span><span>采用薄型</span><span>(0.75mm) 64</span><span>引脚</span><span>7mm x 11mm QFN</span><span>封装，工作温度范围为</span><span>-40</span><span><span>°</span></span><span>C</span><span>至</span><span>125</span><span><span>°</span></span><span>C</span><span>。</span></p>
<p><strong><span lang="EN-US">LT8491</span></strong><strong><span>主要特性</span></strong></p>
<ul>
<li><span>VIN</span><span>范围：</span><span>6V</span><span>至</span><span>80V</span></li>
<li><span>VBAT</span><span>范围：</span><span>1.3V</span><span>至</span><span>80V</span></li>
<li><span>单个电感允许</span><span>VIN</span><span>高于、低于或等于</span><span>VBAT</span></li>
<li><span>用于太阳能供电充电的自动</span><span>MPPT</span></li>
<li><span>自动温度补偿</span></li>
<li><span>I2C</span><span>遥测和配置</span></li>
<li><span>内部</span><span>EEPROM</span><span>用于配置存储</span></li>
<li><span>采用太阳能电池板或直流电源供电</span></li>
<li><span>四个集成反馈环路</span></li>
</ul>
<p><strong><span>报价与供货</span></strong></p>
<div align="center">
<table border="1" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse:collapse;mso-table-layout-alt:fixed;border:none;
mso-border-alt:solid windowtext .5pt;mso-yfti-tbllook:480;mso-padding-alt:
0cm 5.4pt 0cm 5.4pt;mso-border-insideh:.5pt solid windowtext;mso-border-insidev:
.5pt solid windowtext" width="567">
<tbody>
<tr style="mso-yfti-irow:0;mso-yfti-firstrow:yes;height:32.75pt">
<td style="width:64.05pt;border:solid windowtext 1.0pt;mso-border-alt:
solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:32.75pt" width="85">
<p align="center" class="MsoNormal" style="text-align:center"><b style="mso-bidi-font-weight:normal"><span style="font-family:宋体;mso-ascii-font-family:
Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial">产品</span></b><b style="mso-bidi-font-weight:normal"><span style="font-family:"Arial","sans-serif""><o:p></o:p></span></b></p>
</td>
<td style="width:77.95pt;border:solid windowtext 1.0pt;border-left:
none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:solid windowtext .5pt;
padding:0cm 5.4pt 0cm 5.4pt;height:32.75pt" width="104">
<p align="center" class="MsoNormal" style="text-align:center"><b style="mso-bidi-font-weight:normal"><span style="font-family:宋体;mso-ascii-font-family:
Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial">全面量产</span></b><b style="mso-bidi-font-weight:normal"><span style="font-family:"Arial","sans-serif""><o:p></o:p></span></b></p>
</td>
<td style="width:134.45pt;border:solid windowtext 1.0pt;border-left:
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<p align="center" class="MsoNormal" style="text-align:center"><b style="mso-bidi-font-weight:normal"><span style="font-family:宋体;mso-ascii-font-family:
Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial">起始单价（千片订量）</span></b><b style="mso-bidi-font-weight:normal"><span style="font-family:"Arial","sans-serif""><o:p></o:p></span></b></p>
</td>
<td style="width:149.05pt;border:solid windowtext 1.0pt;border-left:
none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:solid windowtext .5pt;
padding:0cm 5.4pt 0cm 5.4pt;height:32.75pt" width="199">
<p align="center" class="MsoNormal" style="text-align:center"><b style="mso-bidi-font-weight:normal"><span style="font-family:宋体;mso-ascii-font-family:
Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial">封装</span></b><b style="mso-bidi-font-weight:normal"><span style="font-family:"Arial","sans-serif""><o:p></o:p></span></b></p>
</td>
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<tr style="mso-yfti-irow:1;mso-yfti-lastrow:yes;height:28.2pt">
<td style="width:64.05pt;border:solid windowtext 1.0pt;border-top:
none;mso-border-top-alt:solid windowtext .5pt;mso-border-alt:solid windowtext .5pt;
padding:0cm 5.4pt 0cm 5.4pt;height:28.2pt" width="85">
<p align="center" class="MsoNormal" style="text-align:center"><span style="font-family:"Arial","sans-serif"">LT8491<b style="mso-bidi-font-weight:
normal"><o:p></o:p></b></span></p>
</td>
<td style="width:77.95pt;border-top:none;border-left:
none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
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mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt;height:28.2pt" valign="bottom" width="104">
<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span style="font-family:宋体;mso-ascii-font-family:Arial;mso-hansi-font-family:Arial;
mso-bidi-font-family:Arial">现已供货</span><span style="font-family:"Arial","sans-serif""><o:p></o:p></span></p>
</td>
<td style="width:134.45pt;border-top:none;border-left:none;
border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span style="font-family:"Arial","sans-serif"">$10.35<o:p></o:p></span></p>
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<td style="width:149.05pt;border-top:none;border-left:none;
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-family:"Arial","sans-serif";mso-ansi-language:EN-US">7mm×11mm QFN-64<o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
</div>
<p><strong><span>关于</span></strong><strong><span lang="EN-US">ADI</span></strong><strong><span>公司</span></strong></p>
<p><span lang="EN-US">Analog Devices, Inc.</span><strong><span>是全球领先的高性能模拟技术公司</span></strong><strong><span>，</span></strong><strong><span>致力于解决最艰巨的工程设计挑战。凭借杰出的检测、测量、电源、连接和解译技术，搭建连接现实世界和数字世界的智能化桥梁，从而帮助客户重新认识周围的世界。详情请浏览</span></strong><strong><span>ADI</span></strong><strong><span>官网</span></strong><span><a href="http://www.analog.com/cn/index.html"><span>http://www.analog.com/cn </span></a></span></p>
<p><span>###</span></p>
<p><span>欲浏览官方网站上的</span><span>ADI</span><span>新闻，请访问：</span><a href="http://www.analog.com/cn/about-adi/news-room/press-releases.html"><span…;
<p><span>欲订阅</span><span>ADI</span><span>公司的每月技术杂志</span><span>Analog Dialogue</span><span>《模拟对话》，请访问：</span><a href="http://www.analog.com/cn/analog-dialogue.html"><span>http://www.analog…;
<p><span>更多有关产品信息，请致电亚洲技术支持中心：</span><span>400 6100 006, </span><span>或发送邮件至</span><a href="mailto:china.support@analog.com"><span>china.support@analog.com</span><…;，也可点击</span><span>ADI</span><span>官方微博</span><a href="http://weibo.com/analogdevices"><span>http://weibo.com/analogdevices</s…;，或通过手机登录</span><span><span>m.analog.com </span></span><span>或</span><a href="http://www.analog.com/cn/index.html"><span>http://www.analog.com/cn</sp…。</span></p>
<p><span>更多</span><span>ADI</span><span>产品及应用视频，请访问：</span><a href="http://www.analog.com/cn/education/education-library/videos.html"><span…;