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</script> <div id="p_btn" class="mtw mbm cl xs1" style="display:none;"> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=share&type=thread&id=104483" id="k_share" onclick="showWindow(this.id, this.href, 'get', 0);" onmouseover="this.title = $('sharenumber').innerHTML + ' 人分享'"><i><img src="static/image/common/oshr.png" alt="分享" />分享<span id="sharenumber">0</span></i></a> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=favorite&type=thread&id=104483" id="k_favorite" onclick="showWindow(this.id, this.href, 'get', 0);" onmouseover="this.title = $('favoritenumber').innerHTML + ' 人收藏'"><i><img src="static/image/common/fav.gif" alt="收藏" />收藏<span id="favoritenumber">0</span></i></a> <a id="recommend_add" href="forum.php?mod=misc&action=recommend&do=add&tid=104483&hash=cbffc1fc" onclick="showWindow('login', this.href)" onmouseover="this.title = $('recommendv_add').innerHTML + ' 人支持'"><i><img src="static/image/common/rec_add.gif" alt="支持" />支持<span id="recommendv_add">0</span></i></a> <a id="recommend_subtract" href="forum.php?mod=misc&action=recommend&do=subtract&tid=104483&hash=cbffc1fc" onclick="showWindow('login', this.href)" onmouseover="this.title = $('recommendv_subtract').innerHTML + ' 人反对'"><i><img src="static/image/common/rec_subtract.gif" alt="反对" />反对<span id="recommendv_subtract">0</span></i></a> </div> </td> <td valign="top" class="album_side_r"> <div class="album_side"> <div class="hm mtn mbn"> <a href="http://club.oecr.com/space-uid-114239.html" target="_blank" class="xi2"><img src="http://www.oecr.com/uc_server/avatar.php?uid=114239&size=small" /></a> <span class="tit_author"> <a href="http://club.oecr.com/space-uid-114239.html">vmxnl</a> </span> </div> <div class="date"><span>发布时间:</span> 2010-6-28 17:00</div> <div class="album_info"> <h3>正文摘要: </h3> <p> LED日光灯驱动芯片NU501 1A18 1A20 2A18 2A20,实现路路恒流 芯片特性 :NU501(原厂授权代理商)  最简易之线性定电流组件  15mA~60mA 单/双 通道，3 (单通道) / 5(双通 ...</p> </div> </div> </td> </tr> </table> </div> </div> <div class="bm vw pl" id="comment"> <div class="bm_h cl"> <h2>回复</h2> </div> <div class="bm_c"> <div id="postlistreply" class="xld xlda mbm"><div id="post_new" class="viewthread_table" style="display: none"></div></div><div id="post_822345" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-114239.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=114239&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-114239.html" target="_blank" class="xi2">vmxnl</a><em id="author_822345"> 发表于</em> <span class="xg1 xw0">2011-6-10 09:45:05</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_822345"> (采用台湾数能NU501)市场最低成本LED日光灯驱动方案<br /> 主要应用于 LED球泡，玉米灯，T5灯管。特点成本低，做工简单。<br /> <br /> 深圳市诚信联科技有限公司<br /> <a href="http://www.cxltech.cn" target="_blank">http://www.cxltech.cn</a>我们公司主致力于LED照明行业，为客户提供优良的解决方案，提供全方位的技术支持 谢谢!<br /> <br /> 联系人:古小姐<br /> 电话:0755-86091963/13249827170<br /> QQ:1139196806<br /> <br /> LED作为一种新型光源，节能、长寿命、无污染而受到大家的广泛关注，但目前从国内市场来看，要替代传统的节能灯目前还是有一定的过程。不过，我个人看现在的LED市场，在质量有保证的前提下，价格也合理情况下方可打开国内LED照明市场。 <br /> <br /> 目前台湾数能科技开发一款专门针对LED照明的IC NU501，实现了低成本的恒流驱动方案，整个恒流驱动电源总成本在RMB2元左右。下面是具体方案说明： <br /> <br /> Nu501是最新设计的一款线性LED恒流驱动IC，封装为sot 23-3，应用电压范围为需要少量的外部元件，就可以实现交流输入应用，和传统的应用电路相比，不仅省了隔离变压器，而且缩小了整个系统的体积和设计成本。该产品主要应用在家庭照明和景观照明。 <br /> 典型应用电路： <br /> <br /> 参数设置： <br /> 1.D1～D4通过4个二极管组成整流桥，AC220V交流通过整流桥后输出DC直流。 <br /> 2.C1电容的选择 <br /> 电路中C1是电解电容，主要是起到一个滤波作用并可以提高效率，为保证其达到更高的效率，最好选用10UF以上，因220V交流整流后是311V的直流，估电容的耐压值要300V以上。 <br /> 3.电路中的MOS开关管主要是承担压降，比如电路中串75颗LED灯珠，这样的话，MOS管上所要承担的压降大概在70V左右，所以这样一来它的发热量会比较大，需加散热片进行热处理，为了减少散热量，同样也可以通过使用更大电流的MOS开关管。 <br /> 4.NU501是15ma至60ma的定电流设计，所以在选择输出电流时，可根据自己所需要的电流大小进行选择，来达到您想要的恒流源。 <br /> <br /> 测试数据： <br /> 下表为150颗（75颗串联，2并）0.07W白光LED灯珠的测试数据： <br /> 以下是测试实拍数据图片 <br /> <br /> 图一：测试样板 <br /> 图二：测试样板点亮效果 <br /> 图三：182V交流输入后恒流后电流为0.034A <br /> 图四：200V交流输入后恒流后电流为0.034A <br /> 图五：220V交流输入后恒流后电流为0.034A <br /> 图六：240V交流输入后恒流后电流为0.035A <br /> 图七：客户使用本方案量产的LED日光灯成品 <br /> 序号 元件位号 描述<br /> 1 D1～D4 IN4007 IN4007<br /> 2 R1 1.5M至5.1M<br /> 3 C1 电解电容，300V以上，10uF<br /> 4 D2 8V稳压二极管<br /> 5 Q1 MOS管2A以上（对MOS管型号没有特殊要求）<br /> 6 N1～N3 NU501恒流IC，可以根据所需电流大小并1至3颗<br /> 输入交流电压（V） 输入功率（W） LED电流 功率因素 效率<br /> 183 9.09 34 0.624 90%<br /> 200 10.1 34 0.61 81%<br /> 220 11.1 34 0.626 74%<br /> 240 12.2 35 0.609 67%<br /> <br /> </td></tr></table> </div> <div id="comment_822345" class="cm"> </div> <div id="post_rate_div_822345"></div> </div> </dd> </dl> </div> </div> </div> </div> <script type="text/javascript"> new lazyload(); </script> <div class="wp mtn"> <!--[diy=diy3]--><div id="diy3" class="area"></div><!--[/diy]--> </div></div> </div> <!--autocomment filter by maxnum--> <div class="ft_wp"> <div id="ft" class=" cl"> <div id="flk" > <p> <a 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