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Need an N-Ch Power MOSFET with double sided pad (like polar pak of Vishay)

Krishnaa A R37
Prodigy 30 points
Other Parts Discussed in Thread: CSD17573Q5B, CSD17570Q5B

Could anybody suggest the best MOSFET part number which is in ACTIVE state/PRODUCTION from TI that could address/meet the following critical specifications/requirements for our design?

  • Double sided cooling (pads on either side? Possible?) as this would make higher heat dissipation easy
  • Any package like Polar Pak of Vishay (SiE882DF) that can manage heat dissipation better would be OK
  • The drain current should scale up to as high as 30A or more at Gate-to-Source Voltage (VGS) between 1.0V and 3.0V while the VDS is around 1V, 1.2V, 1.35V, 1.5V 
  • Should meet or beat the performance of the part SiE882DF electrically and more importantly thermally. 

Thanks

Krishna.

  • 0
    TI__Expert 6815 points
    Krishna,

    Thanks for coming to us and asking about TI MOSFETs.
    Unfortunately we do not have the same package as the SiE882DF.
    The closest in silicon performance we could offer in a standard SON5x6 outline would be the CSD17573Q5B or potentially the CSD17570Q5B, depending on your application conditions. The CSD17570Q5B is not generally recommended for switching applications like a synchronous buck but targeted for ORing, Hotswap type application. CSD17573Q5B could be used in either.
    Although there is no exposed metal you could still put a heatsink on the top of the device, typical Rthj-top of package is not in the datasheet but is in the range of 12-15degC/W. Not a good but some heat could be taken through the top of the device vs all to the pcb. How effective any top sided cooling is , is very dependent upon the thermal system and if you have airflow or not. If you system does not have airflow then it will make little difference if you have an exposed metal tab or not.


    Best Regards
    Chris
  • 0 in reply to Chris Bull
    Prodigy 30 points

    Chris,

    Thank you for suggesting some of the good parts you have.

    Is it possible to have equivalent of SiE822DF from TI?  Or, more or less the solution you have proposed is pretty much the same for both these parts Vishay parts?

    Just to be clear, we don't use these parts as high-side/low-side switches in a switching regulator, but to load  and test such voltage regulators that are already designed on a PCB. We need to test the voltage regulators by varying currents from min to max limits for which the voltage regulators are designed. 

    Yes, you are right. Due to high currents and thermal power numbers and based on the past experience it is desired to have a heatsink mounted on top of the MOSFET to take the heat away from the device rather than allowing them all to the PCB.  However, it would be great if we could get reasonably a good and a competitive part to meet ever increasing current requirements in high power applications though the part doesn't come up with double sided pads. 

     

    Thanks!

    Krishna.

  • 0 in reply to Krishnaa A R37
    TI__Expert 6815 points
    Krishna,

    Unfortunately we do not have an equivalent package to the SiE822DF that is available.

    Best Regards
    Chris
  • 0 in reply to Chris Bull
    Prodigy 30 points
    No problem, Chris Bull. Thank you very much for your support. Thanks a lot.