厦门泰尼电气有限公司
主营产品: AB模块PLC |
厦门泰尼电气有限公司
主营产品: AB模块PLC |
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更新时间:2018-05-03 12:28:18浏览次数:188
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FIREYE EP160*-*FIREYE EP160
FIREYE EP160*-*FIREYE EP160
当基极电流大于此值的两倍,三极管就基本进入深度饱和状态。三极管深度饱和和临界饱和的Vce差很大。临界饱和压降大,但退出饱和容易;深度饱和压降小但不容易退出饱和。所以,不同用途选择的基极电流是不一样的。
还有,饱和压降和集电极电流有直接关系。集电极电阻越小,饱和集电极电流就越大,饱和压降越大。反之也相反(集电极电阻越大,饱和集电极电流就越小,饱和压降越小)。如果集电极电流5毫安时三极管饱和,9013、9012之类的饱和压降一般不超过0.6伏。基极电流超过两倍Vcc/βRc时,一般饱和压降就小到0.3V左右了。
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