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UCC28950: Calculations and References for a High-Power DC-DC Converter (400VDC to 15VDC)

alfin rizki
Prodigy 20 points
Part Number: UCC28950


Tool/software:

Hello,

I am designing a DC-DC converter to step down 400VDC to 15VDC to power 12 BLDC motors, each drawing 40A. I need guidance on the necessary calculations to handle such high current, especially regarding the selection of converter topology, key components (MOSFETs, diodes, transformer/inductor), and an appropriate cooling system.

Are there any references or example designs for high-power converters that I can use as a reference? .

Thank you in advance for your guidance!

Best regards,
Alfin Rizki

  • 0
    TI__Guru* 86286 points

    Hello,

     

    Your inquiry has been received and it will be addressed in the order that it was received.

     

    Regards,

  • 0 in reply to Mike O'
    TI__Guru* 86286 points

    Hello,

    The following link will bring you to a design that can step down 410 V to 12 V 600 W.  This is very close to your design requirements.  If you changed the output turns ratio of the transformer design it may just work for you design.  This actually is an evaluation module that you can order and evaluate as well. https://www.ti.com/lit/ug/sluub02a/sluub02a.pdf

    There is an application note using a phase shifted full bridge (PSFB) using the UCC28950 below that goes through the step by step design process.  There is also a link to an excel design tool inside the application note.  It uses the same calculations that are in the application note. 

    https://www.ti.com/lit/pdf/slua560

    Regards,