Non-isolated SMPS for single phase smart meters

Single phase prepaid/smart meters require very low cost, low wattage (< 2.5 W) non-isolated power supply. The meters should be capable of working with an input voltage range of 100 VAC on the lower side, given poor utility conditions in some regions, to 415 VAC on the higher side so as to sustain phase-phase voltage as well. The real voltage levels can touch 500 VAC (415 VAC +20%).

The application report describes an application of the UCC28722 flyback controller used in a buck configuration tailored for a smart energy metering application. It goes through the step-by-step procedures a designer must follow to complete an AC-DC Buck switch mode power supply unit (SMPS) using the UCC28722.The board has been built and tested based on this application report.

View the PDF document for more information.

Originally published by Texas Instruments Inc. at www.ti.com as "AC-DC Non-Isolated SMPS for Single Phase Smart Meters Based on UCC28722".