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TPS40210: VIN 20V converter to VOUT 54V/2A, TPS40210 and LM5020 question

KUO WENYUNG
Intellectual 285 points
Part Number: TPS40210
Other Parts Discussed in Thread: LM5020

Tool/software:

Dear TIer,

I have project power spec as following

VIN 20V, VOUT 54V and 2A.

Concern the IC cost, I would like to know what topology have higher efficiency? please help us to advise, thank you!

1. non isolation with Boost and design TPS40210 

2. isolation with Flyback and design by LM5020

  • 0
    TI__Mastermind 30170 points

    Hi Kuo,

    Thanks for using the e2e forum.
    If isolation is not a system requirement, you are normally cheaper with a non-isolated boost topology.
    Flyback transformers have higher cost than a simple inductor.
    Also a standard boost topology should be able to achieve higher efficiency.

    Because of this, I would recommend TPS40210 or LM5155 in non-isolated boost topology.

    Best regards,
    Niklas