An Efficiency Improvement Method of High-step-down Converter

The power supplies for data centers and telecom station are replaced complex and expensive isolated 48 V/54 V step-down converters with more efficient non-isolated, high-density step-down regulators. Replacing the isolated converter with a non-isolated step-down converter can significantly simplify the design, reduce costs and board space. A novel high-step down converter is proposed with three advantages: (1) Zero voltage switching turn-on; (2) It only needed one extra coupling inductor, a ground reference active switch, and a capacitor; (3) it can be driven by the buck control IC. In this paper, an efficiency improvement method is presented.