Transcription of Feedforward Capacitor to Improve Stability and …
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Feedforward Capacitor to Improve Stability and …
CO1 1211 11C =+25 pF2R R R - fffp1 SLVA466A December2011 RevisedJune2017 SubmitDocumentationFeedbackCopyright 2011 2017,TexasInstrumentsIncorporatedFeedfor wardCapacitorto ImproveStabilityand BandwidthWiththe TPS621-Familyand TPS821-FamilyApplicationReportSLVA466A December2011 RevisedJune2017 FeedforwardCapacitorto ImproveStabilityandBandwidthWiththe TPS621-Familyand TPS821-FamilyMatt commonmethodto improvethe stabilityand bandwidthof a powersupplyis to use a feedforwardcapacitor,whichis a capacitorplacedacrossthe zeroand a pole (fZ< fP) to the controlloop,whichcan be strategicallyplacedto improvethe be measuredin boththe transientresponseand bodeplot of the designstrategiesfor placingthe poleand zeroat the optimalfrequencyto improvetransientresponseand circuitstabilityfor the TPS62130/40/50/60/70 DCS-Control foundin theTI applicationreportOptimizingtheTPS62130/4 0/50/60 a trademarkof othertrademarksare the propertyof SimplifiedSchematicWithInternaland ExternalFeedforwardCapacitorsShownThe traditionalmethodof designingwith a feedforwardcapacitoris to add an externalcapacitor(Cff)inparallelwith the high-sidefeedbackresistor,R1 in Figure1.
IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES Texas Instruments Incorporated (‘TI”) technical, application or other design advice, services or information, including, but not limited to,
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