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MOSFET 200A

May
Genius 9880 points

Hi,

Customer is looking for a mosfet that has a drain to source of 200A that will be used in their application,

"
1. Do you have a MOSFET, which I can use with a drain-source current of 200A? 
2. How can I connect these MOSFETs to the other components of my circuit? Because for 200A I need quite thick cables and I can't use plate for 200A. So can I directly connect these MOSFETs to the 200A or what else can I do to connect the MOSFET with 200A.

I am referring to cables of 70mm^2. And I want to connect such au cable to a thin pin of a MOSFET. How can I do this? Direct connection is one oportunity, but impossiple because the cables are much too big. I simply want to connect such a cable to a thin MOSFET pin. And I don't know how to do this. So I asked you. I can't show you the schematic. But as I told I need to connect a cable of 200A wit a thin MOSFET pin. And the 200A are directly from a current source, because I want to switch this current by using a MOSFET.

The IC that I could see in the website are the following, https://www.ti.com/power-management/mosfets/n-channel-transistors/products.html#p372max=200;400&p2750=200;456&p3276=200;200

"

 

Thank you in advance.

Regards,
Maynard

  • 0
    TI__Mastermind 38330 points

    Hello Maynard,

    Thanks for promoting TI FETs at your customer. It is not physically possible to connect a 70mm^2 cable directly to the pins of a MOSFET. Also, a single FET is not capable of carrying 200A continuous current. This would require multiple FETs in parallel mounted on a PCB with connectors rated for the current. Can you please ask the customer to share additional details on their requirements. What is the maximum drain-source voltage and gate drive voltage? Is 200A continuous or is it pulsed? It sounds like the FET being used for a load switch or hot swap type of application where it will be turned on and left on for an extended period of time, correct? Will the FET be ground referenced (i.e. low side switch with source grounded and drain connect to the load) or floating (i.e. high side switch with drain connected to the supply and source connected to the load)? Please let me know.

    Best Regards,

    John Wallace

    TI FET Applications

  • 0
    Prodigy 40 points

    Hello Mr. Wallace,

    I am the customer Mr. Yago was talking about.

    I already bought a MOSFET for my application. 

    The maximum drain-source voltage, that occurs in my circuit is 15V. The gate voltage shouldn't be very high. As maximum therefor I can name a voltage of 5.5V.

    The current of 200A only flows for about 200ms and the time, when no current flows is at least 2s. The current, which flows in the time for 200ms is DC. The MOSFET is directly connected to the current source. So in my case the source of the MOSFET ist connected to ground.

    But my actually question is: How can I connect a MOSFET to the 70mm^2 cables?

    Best regards 

    Julian Rassl

  • 0 in reply to Julian Rassl
    TI__Mastermind 38330 points

    Hello Julian,

    Thanks for providing more details about your application. As stated in my previous response, there is no way to directly connect the 70mm^2 cables to the MOSFET. The FETs would need to be mounted on a PCB with the appropriately rated connectors or lugs for cable attachment. Can you share the part number of the FETs you have purchased for this application? Are they surface mount or thru hole devices? You will most likely have to parallel multiple FETs to be able to conduct 200A and spread the power dissipation in multiple packages over a larger area. TI has a number of reference designs and evaluation modules that use a copper lug connector from Panduit. I have included a link below. How do you plan to drive the FETs? Proper gate drive is required to switch 200A.

    Best Regards,

    John

  • 0 in reply to John Wallace1
    Prodigy 40 points

    Hello Mr. Wallace,

    I would use the MOSFET "IRFS3004-7PPbF" from Infineon. It is a SMD soldered MOSFET.

    I have been searching for a while now, but I couldn't find suitable connectors or lugs. Do you have an idea, which product I can use for the connection?

    Ok, but it would be great, if I could use only one MOSFET. But do you have any suggestion, how I can use the parallel MOSFETs with the 70mm^2 cables?

    Can you please give me the link again? Because I couldn't find it in your last post.

    I want to drive the MOSFET by using a NAND.

    Best regards

    Julian Rassl

  • 0 in reply to Julian Rassl
    TI__Mastermind 38330 points

    Hello Julian,

    Here is the link to the Panduit lug connector:

    https://www.digikey.com/en/products/detail/panduit-corp/CB70-14-CY/317382

    I would recommend contacting the MOSFET supplier, Infineon, for additional technical support to determine if a single FET or multiple paralleled FETs are needed for your application.

    Best Regards,

    John

  • 0 in reply to John Wallace1
    Prodigy 40 points

    Hello Mr. Wallace,

    thank you for this suggestion. But can I really use this lug to connect the cable to the small pins of the MOSFET?

    Infineon said, for my application it is okay to use one MOSFET. I am only asking here for the connection between MOSFET and my cables, because they can't give me an answer to this question. So it would be very nice, if you can help me.

    Thank you very much.

    Kind regards 

    Julian Rassl

  • 0 in reply to Julian Rassl
    TI__Mastermind 38330 points

    Hello Julian,

    It is not possible to use the lug to connect the cable directly to the pins of the MOSFET. As I stated in my earlier responses, you would need to design a printed circuit that the FET(s) would be soldered onto. The lugs would be attached to the PCB with solder or a fastener and thick/wide copper traces would be used to connect from the lug to the MOSFET pins. Below is a link to a battery disconnect switch with similar requirements to yours. Perhaps you could use something like this in your application.

    300A battery disconnect switch

    Best Regards,

    John

  • 0 in reply to John Wallace1
    Prodigy 40 points

    Hello Mr. Wallace,

    thank you very much for your help until now. 

    I'll have a look at this link.

    Kind regards

    Julian Rassl