二极管常见的封装类型，DO-15、DO-27、SOD-323、SOD-723等，相信大家都很熟悉。
图源：百度百科
封装指的是安装半导体集成电路芯片用的外壳。对于电子元器件来说，封装是非常有必要的。
一方面，封装不仅起着安装、固定、密封、保护芯片及增强电热性能等方面的作用，而且还通过芯片上的接点用导线连接到封装外壳的引脚上，这些引脚又通过印刷电路板上的导线与其他器件相连接，从而实现内部芯片与外部电路的连接。因为芯片必须与外界隔离，以防止空气中的杂质对芯片电路的腐蚀而造成电气性能下降。
另一方面，按统一规格封装后的芯片，也更便于安装和运输。
细心的电子工程师会发现，电子元器件有着不同的封装类型，不同类的元器件外形虽然差不多，但内部结构及用途却大不同，譬如TO220封装的元件可能是三极管、可控硅、场效应管甚至是双二极管。TO-3封装的元器件有三极管，集成电路等。
今天我们就来盘点一下常见的二极管、三极管、MOS封装类型，下图含精确尺寸。
","gnid":"9240990bf1032510b","img_data":[{"flag":2,"img":[{"desc":"","height":"457","title":"","url":"https://p0.ssl.img.360kuai.com/t01e3b71dde3e2a2add.jpg","width":"573"},{"desc":"","height":"699","title":"","url":"https://p0.ssl.img.360kuai.com/t01edfef6ec62c934b9.jpg","width":"723"},{"desc":"","height":"763","title":"","url":"https://p0.ssl.img.360kuai.com/t016a7f2eaa1c0ce07d.jpg","width":"723"},{"desc":"","height":"885","title":"","url":"https://p0.ssl.img.360kuai.com/t017f2d8df0c06d30d2.jpg","width":"723"},{"desc":"","height":"780","title":"","url":"https://p0.ssl.img.360kuai.com/t0195671cd7627eb2d0.jpg","width":"723"},{"desc":"","height":"765","title":"","url":"https://p0.ssl.img.360kuai.com/t01208bf1c935c73fda.jpg","width":"723"},{"desc":"","height":"762","title":"","url":"https://p0.ssl.img.360kuai.com/t01287825c601a1805e.jpg","width":"723"},{"desc":"","height":"727","title":"","url":"https://p0.ssl.img.360kuai.com/t010486e8be17865257.jpg","width":"723"},{"desc":"","height":"859","title":"","url":"https://p0.ssl.img.360kuai.com/t01113ccaffdf1eb607.jpg","width":"723"},{"desc":"","height":"884","title":"","url":"https://p0.ssl.img.360kuai.com/t01fcdd6bf77d7a0690.jpg","width":"723"},{"desc":"","height":"886","title":"","url":"https://p0.ssl.img.360kuai.com/t016d22310303b83ca9.jpg","width":"723"},{"desc":"","height":"885","title":"","url":"https://p0.ssl.img.360kuai.com/t01ca4d3a64e6d9c758.jpg","width":"723"},{"desc":"","height":"884","title":"","url":"https://p0.ssl.img.360kuai.com/t01983340c019471ddf.jpg","width":"723"},{"desc":"","height":"882","title":"","url":"https://p0.ssl.img.360kuai.com/t016235a6903da21e65.jpg","width":"723"},{"desc":"","height":"883","title":"","url":"https://p0.ssl.img.360kuai.com/t017cedb93ff85060d2.jpg","width":"723"},{"desc":"","height":"883","title":"","url":"https://p0.ssl.img.360kuai.com/t012d787752f84c686c.jpg","width":"723"},{"desc":"","height":"886","title":"","url":"https://p0.ssl.img.360kuai.com/t01e8e481fd06f63ce2.jpg","width":"723"},{"desc":"","height":"887","title":"","url":"https://p0.ssl.img.360kuai.com/t01b042dff975978a13.jpg","width":"723"},{"desc":"","height":"883","title":"","url":"https://p0.ssl.img.360kuai.com/t01c1108d4b6dc0a8ca.jpg","width":"723"},{"desc":"","height":"883","title":"","url":"https://p0.ssl.img.360kuai.com/t01c1108d4b6dc0a8ca.jpg","width":"723"},{"desc":"","height":"886","title":"","url":"https://p0.ssl.img.360kuai.com/t01699047073e68c4a9.jpg","width":"723"},{"desc":"","height":"886","title":"","url":"https://p0.ssl.img.360kuai.com/t0125f749eb79b709a5.jpg","width":"723"}]}],"original":0,"pat":"art_src_0,fts0,sts0","powerby":"hbase","pub_time":1681369684000,"pure":"","rawurl":"http://zm.news.so.com/425b1f9d6f86e3046ee1e52c71ea9df0","redirect":0,"rptid":"fdb0329cc18a4274","rss_ext":[],"s":"t","src":"华秋商城","tag":[{"clk":"ktechnology_1:芯片","k":"芯片","u":""},{"clk":"ktechnology_1:集成电路","k":"集成电路","u":""}],"title":"二极管/三极管/MOS管的封装类型，看这一篇就够了！
杜鬼熊5213mos管开关电路是怎样工作的? -
融功伦17619541819 ______ ■mos管开关电路中要用到MOS场效应管来代替开关,场效应管有三个极:源极S、漏极 D和栅极(或叫控制极)G. 工作原理是:在给源极和漏极 之间加上正确极性和大小的电压(因为管型而异)后,再给G极和源极之间加上控制电压,就会有相应大小的电流从源极流向漏极 ,如果信号电压够大,这个电路就能瞬间饱和而成为一个开关了.
杜鬼熊5213MOS管开关电路? -
融功伦17619541819 ______ MOS管作为开关元件,同样是工作在截止或导通两种状态.由于MOS管是电压控制元件,所以主要由栅源电压uGS决定其工作状态.MOS管在导通与截止两种状态发生转换时同样存在过渡过程,但其动态特性主要取决于与电路有关的杂散电容充、放电所需的时间,而管子本身导通和截止时电荷积累和消散的时间是很小的.
杜鬼熊5213mos管 集成电路 肖特基怎么区分 -
融功伦17619541819 ______ 1、看文字,从文字、特别是型号上能分辩, 2、看管脚,mos管3~4个脚,且较粗; 集成电路,脚数不限,但都比较细, 肖特基脚数2~3个圆柱形居多, 3、对于贴片封装的,看个头大小,mos管 集成电路 肖特基一般是从大到小加以区分, 不明情况下,一般不宜测量区分.
杜鬼熊5213三极管是啥 -
融功伦17619541819 ______ 晶体三极管又称双极型三极管,它是利用是有电子和空穴两种载流子的运动而工作的,简称三极管. 三极管放大作用的理解,切记一点:能量不会无缘无故的产生,所以,三极管一定不会产生能量,但三极管厉害的地方在于:它可以通过小电流...
杜鬼熊5213帮忙解释下这个电路图 -
融功伦17619541819 ______ 这是一个开关电源,反激的.BR1、C1整流滤波,U1是一个电源控制集成电路,三脚驱动MOS管,T1是变压器,C8、R11、D1组成RCD吸收电路,用于吸收MOS管关断时变压器产生的反峰电压.R4是限流电阻,R...
杜鬼熊5213MOS管中VD是什么意思 -
融功伦17619541819 ______ MOS管的三个电极为,栅极G,漏极D,源极S!VD表示的是漏极的电压
杜鬼熊5213请教:MOS管做开关电路 -
融功伦17619541819 ______ 你电路的问题很明显,要了解原理,请参考以下电路: 带软开启功能的MOS管电源开关电路 这是很通用和成熟的电路,原理讲解参考自《带软开启功能的MOS管电源开关电路》.
杜鬼熊5213mos驱动电路图看不懂 -
融功伦17619541819 ______ 看了你们的对话,我发现楼主还没明白,小白没有关系,没开数电模电更没关系,现在的你能对照着图纸连接实物,说明你很有学习电路的潜力!! 下面我给你详细点的解释,希望对你有所帮助. J3的三个端子:1.
杜鬼熊5213这个电路图MOS管是怎么驱动的 -
融功伦17619541819 ______ 1. Q5为NMOS管,R12为限流电阻(或是偏置电阻),源漏之间的二极管为保护二极管. 2. 源极接地,电压为0,当栅极(即图中右眼驱动1)的电压大于开启电压Vth(一般为0.7V)时,就可在源漏之间形成导电沟道,产生电流. 3. 栅极未加...
杜鬼熊5213怎么判断MOS管是N沟道还是P沟道?心里一直纠结这个问题!书上是这么说的,在MOS管中,1,2,3脚通常作S极,4脚作G极,5,6,7,8脚作D极.用万用表的二... -
融功伦17619541819 ______[答案] 万用表打二极管档,G极不管它,黑表笔接D极,红表笔接S极能导通的话就是N沟道,反过来表笔互换能导通就是P沟道,导通电压一般0.4-0.7V,这样能明白了吧