ag8只为非同凡响

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                如何从外观判断不同封装的MOS管脚极?/h2>

                2016-07-07

                面上我们看到的MOS有多种装Q常见的有SOP8Q不同的装之间MOS的脚C吡,脚的极性排列也各不相同Q那么从外观上我们如何判断它的管脚极性呢?下面我们来看看常见的MOS封及其管脚极性规律?/span>

                MOS有三种极性:SQ源极)?/span>GQ栅极)?/span>DQ漏极。下面我们用G?/span>S?/span>DU来代表它的种极性?/span>

                一般情况䨀芯片上会用以个小圆点标识片的1脚我们叫它PIN1Q依ơ类?/span>PIN2?/span>PIN3…?/p>

                MOS封装及脚极性:

                SOP8 MOS共?/span>8个脚Q让圆点位于芯牣ۣݡ的左下方,?/span>PIN1开始,逆时针方向依ơؓ2?/span>3?/span>4、?/span>5?/span>6?/span>7?/span>8脚,?/span>           


                那么不管?/span>N沟道q是P沟道对应的管脚极性都是:PIN4?/span>G极,D极单独在一侧(5?/span>6?/span>7?/span>8脚)Q剩下的3个脚Q?/span>1?/span>2?/span>3脚)?/span>S极?/span>

                 

                同理DFN装?/span>MOS虽然是贴片状Q但8个脚的管脚极性跟SOP装一栗?/span>

                V7D%KD5U}CB6ZV73.jpg

                 

                ?/span>UItra SOP8装?/span>MOS则?/span>1?/span>2?/span>3q成一个整体作両?/span>S?/span>

                 

                6个脚?/span>TSOP-6MOS?/span>1?/span>2?/span>5?/span>6脚ؓD极,PIN3?/span>G极,PIN4?/span>S极?/span>

                QQ囄20160707114107.jpg

                 

                 同ؓ6个脚?/span>SOT-363 为双MOS结构管脚极性如下图:

                ,

                 

                3个脚?/span>SOT-23 MOS管脚极性:

                 

                另外一U?/span>TO-252 装?/span>MOS管脚极?/span>

                如何判断MOS的好坏Q?/span>

                万用表调至“二枡体档”,量MOS?/span>3个极两两之间的|q交换位|这校可以得?/span>6个|

                若这6个g只有一个值是位于0.20V~0.70V之间的则品,之则ؓ不良品?/span>



                     文章转自Q?a href="http://www.gsdzic.com/article.php?id=175" target="_self">q盛芯城

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