I am designing a 30V 5A lab bench power supply having SMPS as a pre-regulator for the linear stage which will keep the SMPS output always 4V higher than the main output voltage. This means SMPS output will be varying from 4V to 34V. For SMPS, I have used forward topology and therefore it requires a minimum load to operate properly. After some trial and error in the simulation, I found out that it requires a 1.2W minimum load at its output and therefore I want to have some margin and want to place a 2W load at the output. But since the output voltage will be varying from 4V to 30V I can not just put a resistor at the output because if it is dissipating 2W at 4V then it will be dissipating 144.5W at 34V which is obviously not practical.

Is there any simple way that requires only a few components to overcome this problem?