• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 38 subscribers
  • Views 1302 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

PMP21999: CLLC Design Consult

Stanley Dai
Expert 5810 points
Part Number: PMP21999

Hi Team,

Customer is consulting whether CLLC can achieve VIN=20~60V / VOUT=300V / POUT=2.5KW bi-directional DC-DC application?

Best,

Stanley

  • 0
    TI__Intellectual 1785 points

    In theory this can work, however any LLC derived topology has a large peak to RMS current ratio. With 20V on the input the resulting RMS currents at 2.5 kW would be huge. These large currents will make managing the losses difficult. 

    That aside the exact topology used is going to be a function of several factors

    1. Vin/Vout range.

    2. Required power flow in both directions

    3. Size constraints.

    4. Efficiency requirements.

    5. Thermal solution.

    All these factors will need to be analyzed to determine the best topology. My recommendation is to explore the merits of CLLC, DAB and phase shifted full bridge. My feeling is the PSFB might be better due to the lower ripple current. But I can't know for sure without doing the design.