Calculate resistor needed to limit current on TS19601CP5

Hey all,
I am attempting to drive a string of leds with this driver (TS19601CP5). The leds draw 300ma so I wish to limit the current to 300ma. I have read through the datasheet, but I can’t figure how to calculate the resister value.

Can someone please explain how I calculate the value for the resistor needed?

Here is the datasheet for the driver
https://www.mouser.com/datasheet/2/395/TS19601_D15-1115004.pdf

https://www.mouser.com/datasheet/2/395/TS19601_D15-1115004.pdf

The formula is given on page 2:

IOUT=500 x ISET=500 x 1.2V/RSET

So RSET = 500 x 1.2 / I SET = 500 X 1.2 / 300 = 2K