Computing power going "Platinum"
The 80 PLUS and Climate Savers Computing initiatives have set a very aggressive efficiency standard for computer power supplies. The “Platinum” level of these standards specifies that computer power supplies must have an efficiency of 90% at 20% of rated load, 94% at 50% load, and 91% at 100% load. To meet these standards, some power-supply designers have chosen to use a phase-shifted, full-bridge DC/DC converter with synchronous rectification. The purpose of this article is to propose different timing for driving these synchronous rectifiers to reduce body-diode conduction and improve overall system efficiency.
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