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LM61495: PSpice efficiency vs webench and datasheet

Noah Hicks
Prodigy 305 points

Part Number: LM61495

Tool/software:

Hi,

I'm trying to simulate the LM61495 in PSpice, and I'm getting weird efficiency measurements. WEBENCH and the datasheet both say that I should be getting around 96-97% efficiency, but when I measure in PSpice, I get closer to 90%. Could someone take a look at my schematic and let me know if there's any obvious reason my efficiency is so much lower? I've attached a zip with my project. I'm using the steady state page and simulation.LM61495_PSPICE_TRANS.zip

  • 0
    TI__Mastermind 22290 points

    Hi Noah,

    PSPICE is usually used to simulate just the transient performance of the device and is not optimized for efficiency.

    Generally, we recommend using Webench or the applications curves in the datasheet for efficiency estimation.

    Estimations on Webench are also correlated with efficiency data taken on the lab bench. Please refer to the webench model for efficiency simulations.

    Best regards,

    Ridge