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LT3932 not switching continuously

Category: Hardware
Product Number: LT3932

we have designed a led flashing circuit with lt3932 IC. we are able to control the dimming through PWM pin, but the led Vout is not continuous.

we checked the voltage on the ISMON pin, its show's 40mv. we have designed the circuit for 2A, but the current drawn by the load is only 40 -60 mA while switching.

As I gone through the datasheet I found that LT3932 is consider the open circuit because of less load current.

so I was planning of changing the RS resistor from 50 mohms to 100 mohms.

is my understanding the concept is correct ?

led_driver