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SOIC-8 Power Management ICs Power Factor Correction UCC28019 UCC28019ADR
Features:
1. 8-Pin Solution Reduces External Components
2. Wide-RangeUniversalAC InputVoltage
3. Fixed65-kHzOperatingFrequency
4.MaximumDutyCycleof 98%(typ.)
5.OutputOver/UndervoltageProtection
6.InputBrown-OutProtection
7. Cycle-by-CyclePeakCurrentLimiting
8. OpenLoopDetection•
9. Low-PowerUser-ControlledStandbyMode2
Applications:
1. CCMBoostPowerFactorCorrectionPowerConvertersin the 100 W to >2 kW Range
2. DigitalTV• HomeElectronics
3. WhiteGoodsand IndustrialElectronics
4.Serverand DesktopPowerSupplies
Description:
1.TheUCC28019A8-pinactivePowerFactorCorrection(PFC)controllerusesthe boosttopologyoperatingin ContinuousConductionMode(CCM).
2. The controlleris suitablefor systemsin the 100 W to>2 kW rangeovera wide-rangeuniversalac lineinput.
3. Start upcurrentduringundervoltagelockoutislessthan200μA.
4. Theusercan controllow powerstandbymodeby pullingthe VSENSEpin below0.77V.
5. Low-distortionwaveshapingof the inputcurrentusingaveragecurrentmodecontrolis achievedwithoutinputlinesensing,reducingthe externalcomponentcount.
6. Simpleexternalnetworksallowforflexiblecompensationof the currentandvoltagecontrolloops.
7. Theswitchingfrequencyis internallyfixedand trimmedto betterthan±5% accuracyat25°C. Fast1.5-Apeakgatecurrentdrivestheexternalswitch.
8. Numeroussystem-levelprotectionfeaturesincludepeakcurrentlimit,softover-current,open-loopdetection,inputbrown-out,andoutputover/undervoltage.
9. Soft-startlimitsboostcurrentduringstart-up.A trimmedinternalreferenceprovidesaccurateprotectionthresholdsand a regulationset-point.
10. An internalclamplimitsthe gatedrivevoltageto 12.5V.