RDK-158: 5W, 5V @ 1A, 85 ~ 265VAC

This engineering report describes a 5 W constant voltage/constant current (CV/CC) universal-input power supply for cell phone or similar charger applications. This reference design is based on the LinkSwitch-II family product LNK616PG.

The LNK616PG can be configured to either be self-biased from the high-voltage DRAIN pin, or to receive an optional external bias supply. When configured to be self-biased, the very low IC current consumption ensures a worst-case no-load power consumption of less than 175 mW at 265 VAC, well within the 300 mW European Union CoC limit. When fed from an optional bias supply (as in this design), the no-load power consumption reduces to <50 mW.