Transcription of Switching regulator fundamentals (Rev. C)
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Switching regulator fundamentals (Rev. C)
1 SNVA559C September2012 RevisedFebruary2019 SubmitDocumentationFeedbackCopyright 2012 2019,TexasInstrumentsIncorporatedSwitchi ngregulatorfundamentalsApplicationReport SNVA559C September2012 RevisedFebruary2019 SwitchingregulatorfundamentalsAdamCastal doABSTRACTS witchingregulatorsare increasingin popularitybecausetheyofferthe advantagesof higherpowerconversionefficiencyand increaseddesignflexibility(multipleoutpu tvoltagesof differentpolaritiescan begeneratedfroma singleinputvoltage).This paperwill detailthe operatingprinciplesof the four mostcommonlyusedswitchingconvertertypes: Buck usedto reducea DC voltageto a lowerDC providesan outputvoltagethat is higherthanthe (invert) an outputvoltagethat is generatedoppositein polarityto the an outputvoltagethat is less thanor greaterthanthe inputcan be generated,as well ,somemultiple-transistorconvertertopolog ieswill be presented:Push-Pull A two-transistorconverterthat is especiallyefficientat low A two-transistorconverterusedin A four-transistorconverter(usuallyusedin offlinedesigns)that can generatethe highestoutputpowerof all the be provi
This paper will detail the operating principles of the four most commonly used switching converter types: Buck— used to reduce a DC voltage to a lower DC voltage. Boost— provides an output voltage that is higher than the input. Buck-Boost (invert)—an output voltage that is generated opposite in polarity to the input.
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