I have a offline (300VDCin) halfbridge design that supplies 24V at 240W max. The PSU goes discontinious at ~ 18W. There is one operational mode when the load drops to 5W and the supply would go discontinuous. Typically I've avoided this but there is no room for a larger output inductor. (isn't that always the case) Controller is a UC3846 current mode with current slope conpensation.
My question is, what changes, if any, would be required to make the supply stable while the output inductor in discontinuous? The load current will be farly stable at 5W then will step up to 24W when a load (mostly resistive) turns on. Then the current draw will vary relatively slowly between 24W and
240W.Regulation requirement are loose at +/- 10% so if I get some loss of regulation performance while discontinious that is OK.