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Current threshold (Isp - Isn) for LT3795 in LTSpice

Category: Datasheet/Specs
Product Number: LT3795

Hi,

I'm starting a design with the LT3795 LED controller and wanted to simulate our circuit.  I started with the demo circuit and tried to replicate the (Visp-Visn) curve on pg. 6 of the datasheet.  The results I got in the LTSpice simulation are drastically different than in the datasheet. 

The Visp-Visn value in the Spice simulation is roughly half that of what the datasheet has.  Is this a problem with the Spice model, or am I misreading the data sheet?