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Power Loss Calculation With CSI Consideration for ...
ApplicationReportSLPA009A June2011 RevisedJuly2011 PowerLossCalculationWithCommonSourceIndu ctanceConsiderationforSynchronousBuckCon vertersDavidJauregui,BoWang, PowerStageABSTRACTT hesynchronousbuckconverterisa widelyusedtopologyinlow-voltage, (CSI)is theinductancesharedbythemaincurrentpatha ndthegatedriverloopina (HS)FETCSI hassignificantimpactonconverterperforman ce,especiallyswitchingpowerloss:thegreat ertheHSCSI, PowerBlock, ,a complementarydesigncalculator(SLPC015) is a a June2011 RevisedJuly2011 PowerLossCalculationWithCommonSourceIndu ctanceConsiderationforSynchronousBuckCon vertersSubmitDocumentationFeedbackCopyri ght 2011,TexasInstrumentsIncorporated 2co nd(HS)ds(ON)HSRMS(HS)P= RI 2cond(L S)ds(ON)LSRMS(L S)P= RI = +++ -+- 22ripp leripplerippleripp leRMS(HS ) oneofthemostpopulartopologiesfortoday s a singleprocessorcontinuetoincrease,variou schallengesariseforlow-voltage, synchronousbuckconvertersis synchr
The synchronous buck converter is a widely used topology in low-voltage, high-current applications. Low-power loss and highly efficient synchronous buck converters are in great demand for advanced microprocessors of the future. Good understanding of power losses in a synchronous buck converter is critical for improving converter performance.
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