MPL-B4530F-HK74AA

MPL-B4530F-HK74AA

在输出Nch MOSFET中，由漏极D的N型扩散层、元件分离用的P型扩散层和连接到电源的N型扩散层（在这里是连接到输出Pch MOSFET的源极S），可以形成寄生NPN晶体管Qa。

当再生电流流过这个Nch MOSFET的源极和漏极之间的寄生二极管Di_a时，由于元件分离P型扩散层是与GND相连接的，因此寄生NPN晶体管Qa的基极和发射极之间的二极管也会产生正向电压。为此，寄生NPN晶体管Qa导通，流过集电极电流并从电源Ea汲取电流。

对于输出Pch MOSFET来说，原理也相同。可以由漏极D的P型扩散层、与源极S共用的背栅N型扩散层、元件分离等的P型扩散层来形成寄生PNP晶体管Qb。

当再生电流流过该Pch MOSFET的源极和漏极之间的寄生二极管Di_b时，寄生PNP晶体管Qb导通，流过集电极电流，且电流流向GND。

当再生电流流过输出MOSFET的寄生二极管时，电流通过寄生晶体管在电源和GND之间流动。一般来讲，流过的电流比再生电流小两个数量级左右，但会因IC所使用的工艺和MOSFET的布局而有很大差异。因此，当通过输出MOSFET的寄生二极管使用电流再生时，需要确认通过这些寄生晶体管流过的电流大小。

General Electric 7098 12" 150 A Amp MCC Feeder Bucket 

General Electric 7098 12" 150 A Amp MCC Feeder Bucket 

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