Flex Ltd.
DC/DC TRANSFORMER FOR POWER TRANSMISSION IN TELECOM APPLICATIONS

Abstract:

A telecom base station has a main-remote structure, where the main unit can be a BBU and the remote unit can be a RRU. A power supply unit is configured to receive as input an AC voltage, such as main line AC voltage, and convert the input AC voltage to a DC voltage at a standardized DC voltage level required for operating standardized baseband equipment in the BBU. A step-up DC transformer converts the DC voltage output from the power supply unit to a high DC voltage level. A step-down DC transformer receives as input the high DC voltage output from the step-up DC transformer and outputs a stepped-down DC voltage level, which is supplied as input to the RRU.