TL494 application report.pdf

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1、ApplicationReportSLVA001E–December2003–RevisedSeptember2011DesigningSwitchingVoltageRegulatorsWiththeTL494PatrickGriffith...............................................................................................StandardLinearandLogicABSTRACTTheTL494power

2、-supplycontrollerisdiscussedindetail.AgeneraloverviewoftheTL494architecturepresentstheprimaryfunctionalblockscontainedinthedevice.Anin-depthstudyoftheinterrelationshipbetweenthefunctionalblockshighlightsversatilityandlimitationsoftheTL494.TheusefulnessoftheTL

3、494power-supplycontrolleralsoisdemonstratedthroughseveralbasicapplications,andadesignexampleisincludedfora5-V/10-Apowersupply.Contents1Introduction................................................................................................................

4、..32TheBasicDevice...........................................................................................................33PrincipleofOperation......................................................................................................44Applicat

5、ions................................................................................................................155DesignExample...........................................................................................................23ListofFigures1TL49

6、4BlockDiagram......................................................................................................32TL494ModulationTechnique.............................................................................................435-VReferenceRegulator..

7、................................................................................................54ReferenceVoltagevsInputVoltage......................................................................................55Internal-OscillatorSchematic...............

8、...............................................................................66OscillatorFrequencyvsRT/CT................................................................................