onsemi Standby ATX Evaluation Board Flyback Converter for NCP1027P065G for Standby/Auxiliary Offline Power Supplies

The NCP1027 offers a new solution targeting output power levels from a few watts up to 15 W in a universal mains flyback application. Proprietary high-voltage technology lets us include a power MOSFET together with a start up current source, all directly connected to the bulk capacitor. To prevent lethal runaway in low input voltage condition, an adjustable brown-out circuitry blocks the activity until a sufficient input level is reached. Current-mode operation together with an adjustable ramp compensation offers superior performance in universal mains applications.