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PWM simulation of LM3409 with Tina-TI

Other Parts Discussed in Thread: LM3409

I wanted to check out the PWM dimming behavior of the LM3409 using the transient reference design. My plan was to simply connect a "voltage general" source to the EN pin and vary the freqency/duty cucle, however the EN pin appears to be shorted to VIN (yes, I disconnected the wire from Vin to EN on the schematic). Does the model not support this, or is it my inexperience with the software?