Remove the load of buck converter

[luis.ramirez]

I have a buck converter that is delivering 6A to a load of 3ohm load.

I'm measuring the output current and stop increasing the dutty cicle when the current reach 6A, at this moment the output voltage will be 18V. A few second after reaching this point the resistance will break and I will have and open circuit at the ouput.

My concern is the following, the inductor's current can't change inmediatly, I guess I'll go to the capacitor increasing the output voltage, It is a risk to damage the power supply or the driver circuit because of a backward current?

[Ammar]

This very much depends on the design of the converter. That is, whether it is designed to work in continuous mode or discontinuous mode. Generally, SMPS need to be loaded to work properly. Whether any damage occurs to it though depends on the design.

[Fungus]

As noted, it depends entirely on the design of the converter.

If you're worried then you could add a clamping diode across the inductor just to be safe