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WEBENCH® Tools/LM5022: Need Help with a Design for 51V/ 10A using this part

Vasant Gohil
Prodigy 30 points
Part Number: LM5022
Other Parts Discussed in Thread: LM5122, LM5170

Tool/software: WEBENCH® Design Tools

Dear TI,

  I have created a design  using LM5022 for I/p 12-48VDC and O/p of 51V 3A. Now my question is if i just change the FET from 15A to some FET with 100A current can i use same design with some modification to get around 10A?

My design link is "https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=72ADA8915BDF7A48%22

If not can you help me what components i need to change to get my desired outputs? Deeply awaiting your reply.

Regards,

  Vijay Gohil

  • 0
    TI__Mastermind 46905 points
    Hi Vijay,

    the experts supporting this device is out of office, he will reply you after back to office. thanks
  • 0
    TI__Mastermind 21720 points
    Hi Vijay,

    Thanks for reaching out with you questions.

    I was unable to open the WEBENCH design. Can you please attach your schematic?

    Just simply changing the MOSFET will not allow for a 10A output current. The inductor, current sense resistor and other components will need to change as well.

    Since the power of the requested design is approximately 510W I recommend using another controller and a multi-phase approach. The options I recommend at the LM5122 and LM5170. These devices can be configured are synchronous, which will help increase the efficiency of the system.

    Please let me know if you have any questions.

    Thanks,

    Garrett
  • 0 in reply to Garrett Roecker
    Prodigy 30 points

    Dear Sir,

     Thank you for your quick reply. Attached is Schematic for 51V with 3.5A current... Could you suggest what changes in components do i need and with what value? Deeply awaiting your reply.

    Regards,

      Vijay Gohil

  • 0 in reply to Vasant Gohil
    Prodigy 30 points
    Dear Ti Team,
    Still awaiting your reply!
  • 0 in reply to Vasant Gohil
    TI__Mastermind 21720 points
    Vasant,

    Please take a look at the LM5170 and the LM5122 solutions. 510W is too large for the LM5022. The major reason is that the efficiency will be low due to the non-synchronous nature of the device and it can not provide multiple phases easily. The LM5122 and the LM5170 can provide multi-phase solutions easily with higher efficiency than the LM5022.

    Thanks,

    Garrett