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LM3409HV: Using IADJ and PWM for current limiting and dimming

Part Number: LM3409HV

I've been looking at the evaluation kit documentation and the datasheet for the LM3409HV LED driver. The datasheet says that I can connect an external power source between 0-1.243V to limit the current. I was wondering if it is possible to use the IADJ pin to do just this and then also use PWM on the EN pin to limit the final current to the LEDs. For e.g. if my design is set for max LED current of 4A then can I use the IADJ to set this max current to say 3A by varying the VADJ and then use a PWM signal to vary the end output current between 0 to 3A?

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