A single power supply provides at least one constant voltage output and at least one constant current output. The single power supply includes two or more switching power converters, such as flyback converters, that are independently controllable based on an error signal corresponding to the associated output. Further, one or more of the switching power converters can implement such control using primary-side feedback. The switching power converters can be flyback converters. Any switching power converters included the in the single power supply can both be part of a single PCB assembly, part of a single IC package, or part of a single monolith semiconductor die.