Can someone explain why you need less duty cycle % to achieve the same output voltage in the discontinuous mode of operation in a buck converter?
This indicates to me that it's more efficient. If the current in the inductor goes to 0, then the diode turns off and there are no more losses associated with that freewheeling diode.
Also, the upper switch seems to turn on with less losses.
It should be the more efficient mode of operation.
Is this true? If so, what are the disadvantages that make it seem like it should be avoided at most times?
It seems that it isn't possible to accurately control the output voltage just using open loop in DCM.