Transcription of How to Design a Simple Constant Current/Constant Voltage ...
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How to Design a Simple Constant Current/Constant Voltage ...
1 SNVA829 June2018 SubmitDocumentationFeedbackCopyright 2018,TexasInstrumentsIncorporatedHowto Designa SimpleConstantCurrent/ConstantVoltageBuc kConverterApplicationReportSNVA829 June2018 HowtoDesigna SimpleConstantCurrent/ConstantVoltageBuc kConverterABSTRACTT echnicalInformationaboutdesigninga constantcurrent,constantvoltage(CC/CV) designimplementationcan be challengingfroma complexity,efficiency,and cost LM5117devicewith its currentmonitor(CM)pin greatlysimplifiesthe designprocess,allowscurrentregulationwit houtusinga lossycurrentsenseresistor,and savescostin the designapproachusingthe LM5117CM pin and the LMV431for currentregulationandvoltageregulation, the SimpleCC/CVMethodUsingthe the of Figures1CC/CVImplementationWitha 30 V-to-54V Input,27 V-at-6A OutputCC/CVConverterUsingthe 30 30 VINWithIncreasingRLOAD(VOUT/ IOUT).. trademarksare the propertyof +To FBRSENSEVZRFBBuck Power Stage+ CC Mode = IOUT =(RINuVFB)/(RFBuRSENSE)CV Mode = VOUT ~VFB+VZRIN June2018 SubmitDocumentationFeedbackCopyright 2018,TexasInstrumentsIncorporatedHowto Designa SimpleConstantCurrent/ConstantVoltageBuc kConverter1 IntroductionA DC-to-DCconverteris typicallyimplementedas a constantvoltage(CV) controlloopadjuststhe duty cyclein orderto maintaina constantoutputvoltageregardlessof changesto the inputvoltageand load constantcurrent(CC)converterregulatescur rentthe sameway:the controlloop adjuststhe duty cycleto maintaina Constant
connected to the output won’t be damaged, which is where constant voltage regulation engages. Some examples of CC/CV converter uses are applications driving a light-emitting diode (LED) or charging batteries or supercapacitors. The current is regulated for a range of output resistances; should the
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