能否搞个LED驱动电路帖子,大家一起补充

xiaoxiao · 发表于 2005-9-5 23:08

老是有人说2个单端的并联电路，（单端电路有个优点就是开关管的损耗低）参考本贴上有人贴的单端电路，供喜欢动手的朋友参考<img src="attachments/dvbbs/2005-9/2005951575284990.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/2005951575284990.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> 下面的管子在上面的管子截止时道通，输出相同功率下减小了对电池的要求和开关管的要求

[此贴子已经被作者于2005-9-5 16:12:47编辑过]

xiaoxiao · 发表于 2005-9-5 23:14

搭了个电路
<img src="attachments/dvbbs/2005-9/2005951595035019.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/2005951595035019.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
实际没找到2V的稳压管用了1个直径3MM的发光管代替，R用了16欧，电感用了节能灯里的E型磁芯的一角，约0.4MM的线绕了16圈，负载1W LED

[此贴子已经被作者于2005-9-5 15:15:52编辑过]

xiaoxiao · 发表于 2005-9-5 23:24

通电后

<img src="attachments/dvbbs/2005-9/20059515174043855.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059515174043855.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> 
测了下LED的电流150MA，断开R时电流80MA，2个C2500不发烫，呵呵LED发热厉害，烫手就关了，当在2个C2500上再各并上一个C2500时，LED端电流200MA
电感的样子
<img src="attachments/dvbbs/2005-9/20059515202778323.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059515202778323.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

xiaoxiao · 发表于 2005-9-5 23:41

这里是DIY的天地，有电路搬出来大家探讨，那些遮遮掩掩的，请到别处去发贴

sjb3658 · 发表于 2005-9-6 02:08

有200mA，
那么可以真正的驱动10个LED了，
本人看过一些振荡电路，
还是第一次发现该图的奥妙之处，
既是反激式，
又正反周期连续供电，
强！！！

sjb3658 · 发表于 2005-9-6 02:15

图中的2V和R＝16Ω，
是控制下面的C2500通断，
用了2V，是不给下面的C2500偏置电压，
那么，可以换成1n的电容吗？

xiaoxiao · 发表于 2005-9-6 04:48

<DIV class=quote>以下是引用sjb3658在2005-9-5 18:15:14的发言： 
图中的2V和R＝16Ω，
是控制下面的C2500通断，
用了2V，是不给下面的C2500偏置电压，
那么，可以换成1n的电容吗？ </DIV>
说下这个2V和R的作用：因为1节电池的电压1.5V，如果去掉这个2V，通电后电源经过L1，R加到下面的C2500，（目的就是隔离这个1.5V的电源），我们希望下面的C2500在上面的C2500截止时才工作，这样1.5V电源是没法给下面的C2500加偏流的，就形成通电后上管工作饱和，下管截止状态，当上管截止后，电感L1放电，通过2极管整流供负载，计算负载上的电压（LED压降按3V，肖特基按，0.3V，3.3v），这个电压大于2V的电压，所以通过2V稳压管经R（R的值因为我搭电路时2V是用发光2极管代的，找了几个电阻试的，以下管的工作电流接近上管为准）驱动下面的C2500，（因为老有人在说2个单端的并联，所以下午就想出了这个电路，想到就搭了个电路试了下，呵呵，还行，不过因为刚想到的电路，肯定有改善的地方，想大家来完善他）

[此贴子已经被作者于2005-9-5 21:14:49编辑过]

sjb3658 · 发表于 2005-9-6 07:01

那么多朋友就等着能输出350mA来驱动　1W　LED，
希望xiaoxiao大侠急人之所急，
向1W进军。
呵呵！

pager · 发表于 2005-9-7 00:06

这里是两款2AA的IC驱动电路,不知道有人用过没?<img src="attachments/dvbbs/2005-9/2005961673880964.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/2005961673880964.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> <img src="attachments/dvbbs/2005-9/20059616102472709.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059616102472709.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

[此贴子已经被作者于2005-9-6 16:10:28编辑过]

sjb3658 · 发表于 2005-9-7 01:55

楼上的IC哪里有卖？

microbridge · 发表于 2005-9-10 02:41

适合从20mA-360mA LED 驱动无需任何外围元件无噪音及EMI问题节省空间高效率
可以串连、并联多个LED 应用于手电筒、矿灯、手机、数码相机、mp3等等
AMC7100系列 20－80mA <a href="http://www.micro-bridge.com/AMC71XXseries.asp" target="_blank" >http://www.micro-bridge.com/AMC71XXseries.asp</A>
 AMC7123/7124 20-360mA <a href="http://www.micro-bridge.com/AMC7123.asp" target="_blank" >http://www.micro-bridge.com/AMC7123.asp</A>
AMC7135 350mA <a href="http://www.micro-bridge.com/AMC7135.asp" target="_blank" >http://www.micro-bridge.com/AMC7135.asp</A>
 <img src="attachments/dvbbs/2005-9/20059918391595893.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059918391595893.gif\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2005-9/20059918394915443.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059918394915443.gif\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2005-9/20059918401046098.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059918401046098.gif\');}" onmousewheel="return imgzoom(this);" alt="" />
如有任何疑问，请联络邮箱：<a href="mailtjasper@micro-bridge.com" target="_blank" >jasper@micro-bridge.com</A>

sjb3658 · 发表于 2005-9-10 03:58

带升压的吗？

xiaoxiao · 发表于 2005-9-10 05:08

<DIV class=quote>以下是引用sjb3658在2005-9-9 19:58:30的发言： 带升压的吗？</DIV>
呵呵，一般IC不会把升压电感做在里面的

sjb3658 · 发表于 2005-9-10 05:30

问题是上图中，
电源为2.7~6V，
2.7也能驱动3.3V的LED？

sjb3658 · 发表于 2005-9-10 05:35

xiaoxiao大侠，
图中的电感，
不是闭合的磁通，
电感量会不会少很多？
<IMG src="http://www.shoudian.org/showimg.asp?BoardID=10&filename=2005-9/20059515202778323.jpg" border=0>

[此贴子已经被作者于2005-9-9 21:36:32编辑过]

sjb3658 · 发表于 2005-9-10 05:54

继续补充：

<HR>

<img src="attachments/dvbbs/2005-9/20059106331293097.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059106331293097.gif\');}" onmousewheel="return imgzoom(this);" alt="" />

[此贴子已经被作者于2005-9-10 6:38:13编辑过]

xiaoxiao · 发表于 2005-9-10 18:52

电感和磁芯的大小形状都有很大关系的，那个7135在淘宝买的

[此贴子已经被作者于2005-9-10 11:06:50编辑过]

xiaoxiao · 发表于 2005-9-10 18:57

<DIV class=quote>以下是引用sjb3658在2005-9-9 21:54:49的发言： 
继续补充：

<HR>

 
<img src="attachments/dvbbs/2005-9/20059106331293097.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059106331293097.gif\');}" onmousewheel="return imgzoom(this);" alt="" /> </DIV>
输出端要增加绕组，以提高输出电压才能推动LED，不然的话输出电压只有2V左右

pager · 发表于 2005-9-16 00:58

补充一张1.5V1W的驱动电路图:
<img src="attachments/dvbbs/2005-9/2005915170641824.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/2005915170641824.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

[此贴子已经被作者于2005-9-15 17:02:03编辑过]

den_18 · 发表于 2005-9-17 20:49

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能否搞个LED驱动电路帖子,大家一起补充

我司有20mA/40mA/60mA/80mA/120mA/180mA/240mA/350mA 白光LED 驱动IC