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LM5022: DC 50V to 112V boost ?

Jason Chien42
Expert 1180 points
Part Number: LM5022
Other Parts Discussed in Thread: LM5122

Dear Sir:

               We have some request for DC 50V boost to 112V/6A and I tried to used  webench to simulation as below link. Is it possible for this circuit? Does TI have any suggest to us? Thanks.


https://webench.ti.com/webench5/power/webench5.cgi?base_pn=LM5022-Q1&VinMin=50&VinMax=50&O1V=112&O1I=6&AppType=POWER&op_TA=30&lang_chosen=en_US&origin=parametric&optfactor=3&Flavor=none&Topology=Boost

Best Regard

Jason

  • 0
    TI__Mastermind 21720 points
    Hi Jason,

    I don't think that the LM5022 is a good choice for this design because it is a non-synchronous part and the currents will be very high for a one phase design.

    Using a device like the LM5122 and an external gate driver is better option. Also the LM5122 can be easily configured for multiphase operation. A good starting point is linked below.

    www.ti.com/.../PMP7973

    Thanks,

    Garrett
  • 0 in reply to Garrett Roecker
    Expert 1180 points

    Dear Garrett:

                           Thanks for your reply. But, our request is 50V(42~58.1V)Vin and 100V(84~116.2V)/6A Vout , This condition can not simulation on webbench , Do you have other design tools or suggest to us? BTW ,PMP7973 look like as non-synchronous , too?

     

    Best Regard

    Jason

  • 0 in reply to Jason Chien42
    TI__Mastermind 21720 points
    Jason,

    I don't think WEBENCH will handle the design because it might be hard to find the correct external parts.

    Note the PMP7973 is non-synchronous but it has two phases. With two phases each phase will only need to handle ~300W. This will make it easier to find the correct external components. The is currently no design tool.

    Thanks,

    Garrett