The DN94 is High performance rectifiers significantly improve server power supply efficiency made by Diodes.
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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 Server standby power supplies Desktop derived servers are de signed to ope rate in high re liability a nd availability a pplication environments whe re it must b e working continuously wit h ext remely low unsch eduled downtime T ypically t he architecture of t he power supply fo llows a t wo st age conve rsion approach as show n in F igure 1 The front en d stage is a Continu ous Co nduction Mode active power factor correcting Boost converter and delivering a constant 400V DC rail to a d
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