D2 Channel Bank: Power Conversion

Abstract

The D2 Channel Bank requires a variety of voltage sources to operate. Some have lenient regulation requirements, while a few have extremely tight tolerance requirements. To derive these voltage sources from a 48-volt central office supply with a minimum of complexity and good conversion efficiency, a tailored design is chosen where, for the less critical voltages, a single switching regulator is used to supply a dc-to-dc converter with several dc voltage outputs and, for the critical voltage sources, series-type regulators are used.