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Simulation problem of LT3748

Category: Software
Product Number: LT3748
Software Version: 24.1.10

Vn005 test by Vds

Vn008 test by Vcompensation

Vn010 test by Vgate

In the pic; I model the inductor coupling to flyback transformer, turns ratio 2:1. To achieve stable 15V output voltage working from 0.2w to 2w. But while changing the input voltage like from 50 to 30V, the output has big variation; is there mistake in this simulation or how optimize the circuit to actual circuit closely.

Thank you for your support

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