NCP1622 - Enhanced, High-Efficiency Power Factor Controller

1 DATA Semiconductor Components Industries, LLC, 2017 August, 2021 Rev. 51 Publication Order Number: NCP1622 /DEnhanced, High-EfficiencyPower Factor ControllerNCP1622 The 6 pin PFC Controller NCP1622 is designed to drive PFC booststages. It is based on an innovative Valley Synchronized FrequencyFold back (VSFF) method. In this mode, the circuit classicallyoperates in Critical conduction Mode (CrM) when Vcontrol voltageexceeds a programmable value Vctrl,FF. When Vcontrol is below thispreset level Vctrl,FF, the NCP1622 (versions [B**] and [D**]) linearlydecays the frequency down to about 30 kHz until Vcontrol reaches theSKIP mode threshold.

2 VSFF maximizes the efficiency at bothnominal and light load. In particular, the stand by losses are reducedto a minimum. Like in FCCrM controllers, internal circuitry allowsnear unity Power Factor even when the switching frequency isreduced. Housed in a TSOP6 package, the circuit also incorporates thefeatures necessary for robust and compact PFC stages, with fewexternal Features Near Unity Power Factor Critical Conduction Mode (CrM) Valley Synchronized Frequency Fold back (VSFF): Low FrequencyOperation is Forced at Low Current Levels (9 Pre programmed Settings) Works With or Without a Transformer w/ ZCD Winding (SimpleInductor) On time Modulation to Maintain a Proper Current Shaping in VSFFMode Skip Mode at Very Low Load Current (versions [B**] and [D**]) Fast Line / Load Transient Compensation (Dynamic ResponseEnhancer) Valley Turn on High Drive Capability: 500 mA / +800 mA VCC Range: from V to 30 V Low Start up Consumption for:[**C] Version: Low Vcc Start up level ( V)[**A] Version.

3 High Vcc Start up level ( V) Line Range Detection for Reduced Crossover Frequency Spread This is a Pb Free DeviceSafety Features Thermal Shutdown Non latching, Over Voltage Protection Second Over Voltage Protection Brown Out Detection Soft Start for Smooth Start up Operation ([**C] Version) Over Current Limitation Disable Protection if the Feedback Pin is Not Connected Low Duty Cycle Operation if the Bypass Diode isShorted Open Ground Pin Fault MonitoringTypical Applications PC Power Supplies Lighting Ballasts (LED, Fluorescent) Flat TV All Off Line Appliances Requiring Power FactorCorrectionPIN CONNECTIONS13 DRVVCTRL2CS / ZCD4FB6(Top View)5 VCCTSOP 6SN SUFFIXCASE 318 GMARKING DIAGRAMGND(Note: Microdot may be in either location)1 XXXAYWGG1 XXX= Specific Device CodeA= Assembly LocationY= YearW= Work WeekG= Pb Free PackageSee detailed ordering, marking and shipping information in thepackage dimensions section on page 2 of this data ORDERING INFORMATIONThe coding letters for the product options does not correspond to the marking on the TSOP6 package.

4 This table shows the correspondence between product option coding and TSOP6 Part Number (OPN)L1, L2, L3 OptionMarkingPackage TypeShippingNCP1622 AEASNT1 GAEAA5 ATSOP 6(Pb Free)3000 / Tape & ReelNCP1622 BCASNT1 GBCA3 CANCP1622 BCCSNT1 GBCC3 CCNCP1622 BECSNT1 GBEC3 ECNCP1622 DCCSNT1 GDCCDC6 NOTE:Other L1, L2, L3 options are available upon product configurations coded with three letters(L1, L2, L3) will be 1. NCP1622 1st LETTER CODING OF PRODUCT VERSIONSL1 Brown out FunctionSkip Mode FunctionA (default)NO (default)NO (default)BNO (default)YES (trim)CYES (trim)NO (default)DYES (trim)YES (trim)Table 2.

5 NCP1622 2nd LETTER CODING OF PRODUCT VERSIONSL2 CrM to DCM VCTRL Threshold (V)tON,max,LL (ms)tON,max,HL(ms) (default) 3. NCP1622 3rd LETTER CODING OF PRODUCT VERSIONSL3 VCC Startup Level (V)A (default) (default) non trimmed (default) version of the product, will bethen coded AEA (L1=A, L2=E, L3=A)L1 = A meaning NO Brow out and NO SKIP ModeL2 = E meaning E version of Frequency FoldbackL3 = A meaning 17V VCC Startup 1. NCP1622 Application Schematic using Auxiliary Winding VoltageEMIF ilterAC lineLOADL1D1Q1 VinVbulkILRsenseCbulkCzRzCpRcs0 CinRfb2 Rfb1123456 FBVCTRLCS / ZCDGNDDRVVCCRauxCauxRcs1 Rcs2 VauxQauxDRVT able 4.

6 DETAILED PIN DESCRIPTIONPin NumberNameFunction1 VCTRLThe error amplifier output is available on this pin. The network connected between this pinand ground adjusts the regulation loop bandwidth that is typically set below 20 Hz to achievehigh Power Factor pin is internally pulled down when the circuit is off so that when it starts operation, thepower increases slowly to provide a soft start pin must not be controlled or pulled down this pin to the PFC stage / ZCDThis pin monitors the MOSFET current to limit its maximum pin is the output of a resistor bridge connected between the drain and the source of thepower MOSFET.

7 Internal circuitry takes care of extracting Vin, Vout, Iind and ZCD4 DRVThe high current capability of the totem pole gate drive ( / + A) makes it suitable toeffectively drive high gate charge Power pin is the positive supply of the IC. The circuit starts to operate when VCC V ([**A] Versions) or V ([**C] Versions) and turns off when VCC goes below V(typical values). After start up, the operating range is V up to 30 pin receives a portion of the PFC output voltage for the regulation and the DynamicResponse Enhancer (DRE) that drastically speeds up the loop response when the outputvoltage drops below of the desired output pin voltage VFB is also the input signal for the (non latching) Over Voltage (OVP) andUnder Voltage (UVP) comparators.

8 The UVP comparator prevents operation as long as FBpin voltage is lower than VUVPH internal voltage reference. A SOFTOVP comparator gradually reduces the duty ratio when FB pin voltage exceeds 105% of VREF. If the outputvoltage still increases, the driver is immediately disabled if the output voltage exceeds 107%of the desired level (fast OVP).A 250 nA sink current is built in to trigger the UVP protection and disable the part if the feed-back pin is accidently 5. MAXIMUM RATINGS TABLES ymbolPinRatingValueUnitsVCTRL1 VCONTROL pin , Vctrl,max(*)VCS/ZCD3CS/ZCD Pin , +9 VDRV4 Driver VoltageDriver Current , VDRV (*) 500, +800 VmAVCC5 Power Supply Input , + 30 VVCC5 Maximum (dV/dt)

9 That can be applied to VCCTBD upon test engineermeasurementsV/sFB6 Feedback Pin , +9 VPDRqJAPower Dissipation and Thermal CharacteristicsMaximum Power Dissipation @ TA = 70 CThermal Resistance Junction to Air550145mW C/WTJO perating Junction Temperature Range 40 to+125 CTJ,maxMaximum Junction Temperature150 CTS,maxStorage Temperature Range 65 to 150 CTL,maxLead Temperature (Soldering, 10 s)300 CMSLM oisture Sensitivity Level1 ESD CapabilityHuman Body Model per JEDEC Standard JESD22 A114 FCharge Device Model per JEDEC Standard JESD22 C101 FMachine Model per JEDEC Standard JESD22 A115C30001000200 VLatch Up Protection per JEDEC Standard JESD78 100mAStresses exceeding those listed in the Maximum Ratings table may damage the device.

10 If any of these limits are exceeded, device functionalityshould not be assumed, damage may occur and reliability may be affected.* Vctrl,max is the VCTRL pin clamp voltage. VDRV is the DRV clamp voltage (VDRV high) if VCC is higher than (VDRV high). VDRV is VCC 6. TYPICAL ELECTRICAL CHARACTERISTICS (Conditions: VCC = 18 V, TJ from 40 C to +125 C, unless otherwise specified) (Note 1)SymbolRatingMinTypMaxUnitStart up and Supply CircuitVCC,onStart Up Threshold, VCC increasing:[**C] Versions[**A] ,offMinimum Operating Voltage, VCC ,hystHysteresis (VCC,on VCC,off)[**C] Versions[**A] VICC,startStart Up Current, VCC = V, below startup voltage 70mAICC,op1 Operating Consumption, no switching.