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CSD19536KTT: layout review for the mosfet placement

rohsik_j
Prodigy 165 points
Part Number: CSD19536KTT
Other Parts Discussed in Thread: TIDA-00364
We have designed 3 phase full bridge MOSFET based inverter circuit and its Layout for 
motor controller application 
The Nominal operating voltage is 48 V, Maximum operating DC current is 200A, and peak winding 
current is 400A, MOSFET selected is CSD19536KTT 
Request you to review the Layout and schematics based on the following aspects 
1.Rail voltage distribution 
2.Current density 
3.Track width requirement based on 70u cu and above( MCPCB) 
4.​Placement of components 
Thank you
PFA for layout document
Review document_ TI.pdf
  • 0
    TI__Mastermind 37910 points

    Hello Kishor,

    Thanks for your interest in TI FETs. Your design is very similar to the TIDA-00364 reference design which is a 5kW inverter using the 5 x CSD19536KTT in parallel for top and bottom FETs in each phase. As such, the schematic and PCB layout are also very similar. I have reviewed your schematic, component placement and layout and they look pretty good to me. I cannot really comment on current density as this is dictated by your design rules and recommendations from your PCB vendor. I will ask the team responsible for TIDA-00364 to also review your design. My only concern is if 4 x FETs in parallel can handle 200A operating and 400A peak current and be effectively cooled. As pointed out above, TIDA-00364 is using 5 FETs in parallel for 130A rms. I will follow up with you as soon as I have more information.

    Thanks,

    John Wallace

    TI FET Applications

  • 0 in reply to John Wallace1
    Prodigy 165 points

    Hello John Wallance,

    Thank you for your valuable feedback, As you mentioned It would be great if it is also out reviewed by team working on TIDA-00364 so that based on their feedback we will move forward with the design plans.

    Regards

  • +1 in reply to rohsik_j
    TI__Mastermind 37910 points

    Hello Kishor,

    My colleague also reviewed the design and it looks good to him as well. We would recommend validating the thermal solution with simulations and testing.

    Thanks,

    John