PTN78020 as high power variable current source (or other POL module)

Hi all.

i would like to know if it's possible to use a PTN78020 or other POL module like PTH1206 as a variable current source to powering high power leds with analogic modulation from 0 to 100%.

the system use the POL and sense the output current by a high side resistor and with operational amplifier fed back to the voltage trim of the module.

if it's possible do you know what is the maximum modulation frequency for this application?

thank you for your help.