This reference design is an isolated opto-regulated: multi-output: 15-W flyback converter. Both 28-V and 7-V outputs are contributing to the voltage regulation on secondary side: while a third output (14 V at 100 mA) is referenced to the primary side ground. This converter has low stand-by power: between 45 mW and 61 mW in the whole Vin range: and has good efficiency at full load (88.8% to 89.6%).