Transcription of UCC28740 Constant-Voltage Constant-Current …
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UCC28740 Constant-Voltage Constant-Current …
4 V 5%VOCVO utput current (IO)Output Voltage (VO)3 V2 V1 VVDDVSFBHVDRVCSGNDUCC28740 SOIC-7 CVDDRS1 VAUXNARS2 RLCRCSVBULKCB2CB1+ VACNPNSVOUTCOUTRTLRFB1 RFB2 ZFBC opyright 2017, texas instruments IncorporatedProductFolderOrderNowTechnic alDocumentsTools &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand JULY2013 REVISEDJULY2017 UCC28740 constant -VoltageConstant-CurrentFlybackC ontrollerUsingOptocoupledFeedback11 Features1 Lessthan10-mWNo-LoadPowerCapability OptocoupledFeedbackfor CV, andPrimary-SideRegulation(PSR)for CC Enables 1% VoltageRegulationand 5%CurrentRegulationAcrossLine and Load 700-VStartupSwitch 100-kHzMaximumSwitchingFrequencyEnablesH igh-Power-DensityChargerDesigns Resonant-RingValley-SwitchingOperationfo rHighestOverallEfficiency FrequencyDitheringto EaseEMI Compliance ClampedGate-DriveOutputfor MOSFET Overvoltage,Low-Line,and OvercurrentProtectionFunctions SOIC-7 Package Createa CustomDesignUsingthe UCC28740 Withthe WEBENCH PowerDesigner2 Applications USB-CompliantAdaptersand ChargersforConsumerElectronics SmartPhones Tabl
VDD VS FB HV DRV CS GND UCC28740 SOIC-7 R C VDD S1 V AUX N A R S2 R LC RCS V BULK + C B1 C B2 V AC NP S V OUT C OUT R TL R FB1 FB2 Z FB Copyright © 2017, Texas Instruments Incorporated 4 V ±5% V OCV Output Current (I O)
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