Communicating information stored at a secondary controller to a primary controller in a secondary-controlled flyback converter is described. In one embodiment, a method includes storing, by a secondary-side controller of a power converter, calibration information associated with a primary-side controller of the power converter. The power converter is a secondary-controlled alternating current to direct current (AC-DC) flyback converter comprising a galvanic isolation barrier. The method further includes sending, by the secondary-side controller, the calibration information to the primary-side controller across the galvanic isolation barrier in response to power-up of the power converter.