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logic level MOSFET

seawalk
Prodigy 130 points
Other Parts Discussed in Thread: CSD18542KCS

Dear Sir,

I am choosing  a MOSFET of motor driver but I found some MOSFETs  (CSD18542KCS) with logic level have a lower Vgs (Threshold Voltage).

what is the Pros and Cons for the MOSFET with logic level? what is the application for? Thanks

  • 0
    Guru 94471 points

    亲；标准MOSFET的Vth大约在3V水平，9V以上充分导通。低于这个水平的MOSFET即为逻辑电平MOSFET。

    这个电平MOSFET大约有两个系列：5V逻辑电平（Vth大约在1.8V水平；4.5V充分导通）和2.7V逻辑电平（Vth大约在1V左右；1.8V冲锋导通）。它们可以用对应的逻辑电平驱动到完全开关状态。

    逻辑电平MOSFET主要用于低压系统；如电池管理等。对于电机驱动；除非是两节及以下锂电供电系统，最好用标准MOSFET。