Adaptive DC-DC Converter for Efficient 4G Macro-Cell Base Station

Abstract—This article presents a new solution for DC-to-DC converters realized for 4G (LTE) macro cell base stations with improved efficiency. The concepts proposed in the EARTH project target a factor two reduction of power consumption in 4G base stations. The solutions are presented and detailed and required DC-to-DC converter specifications are discussed. A practical implementation of a 500 kHz and zero to 112W buck converter is presented. The prototype achieves 94% power efficiency and a good stability over the complete power range.