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200 amp mosfet 3.7v to 4.2v

Mazen Dahabreh
Prodigy 20 points

Hello

I am trying to build a switch that can handle 200 amps of current. I am aware that there are no mechanical switches that can handle this much current on the market today, which is why I would like to use a mosfet switch. Does TI sell MOSFETS that can handle 200amps and can operate in the 3.7v to 4.2v range with minimal resistance and voltage drop. I am open to using MOSFETS in parallel.

Thank you!

  • 0
    TI__Mastermind 18200 points

    We do have some upcoming devices that can handle this much current. However, when you say you need to operate in the 3.7 to 4.2V range, do you mean this will be the VDS when the FET is turned on, or do you mean this will be the gate drive voltage? 

    What is your application? Will you be switching at high frequencies or do you just intend  to use the FET as a load switch? 

    Any constraints on size or package?

  • 0 in reply to Brett Barr1
    Prodigy 20 points

    Hello Brett, 

    Thank you for the quick reply and I apologize for the vagueness of my specifications.  I need the VDS to be in the 3.7-4.2 volt range. I  will be using the FET as a load switch. My size constraints are relatively large at 2" by 5"

    Thank you!

  • 0 in reply to Mazen Dahabreh
    TI__Mastermind 18200 points

    Will this be when the FET is off or on? If its while the FET is off, you can get away with a low voltage FET as you only need to block a few volts. 

    However, if it is while the FET is on, then you will be operating in the linear mode, and will most certainly have to parallel multiple FETs as you are talking about dissipating thousands of Watts, which no single FET can handle.