Click to expand full text
A Product Line of Diodes Incorporated
DN94
High performance rectifiers significantly improve server power supply efficiency
Dr Yong Ang, Diodes Incorporated
Introduction
Alternative appr oaches ca n improve the existing me thods of using Schottky diod es in h igh reliability, h igh ava ilability and low downt ime se rver sta ndby power su pplies. T wo dif ferent secondary circuit approaches, including syn chronous rectification a nd Su per Barrier Rectifie r (SBR™) were used to find the highest practica l efficiency in a +5VSB power supply capable of delivering 27W p eak p ower. Ef ficiency improvements were mea sured i n a n experimental converter, at 3.5% for synchronous rectification and 0.5% for SBR over the Schottky solution. This design note discusses the details.
DN94 Datasheet
