NCP1239 - Fixed Frequency Current-Mode Controller for ...

1 Semiconductor Components Industries, LLC, 2016 October, 2020 Rev. 251 publication Order NumberNCP1239/D Fixed FrequencyCurrent Mode Controller forFlyback ConverterNCP1239 The NCP1239 is a Fixed - Frequency Current-Mode controllerfeaturing a high-voltage start-up current source to provide a quick andlossless power-on sequence. This function greatly simplifies thedesign of the auxiliary supply and the VCC capacitor by activating theinternal start-up current source to supply the Controller during start-up,transients, latch, stand-by a supply range up to 35 V, the Controller hosts a jittered 65 or100-kHz switching circuitry operated in peak current mode the power on the secondary side starts to decrease, the controllerautomatically folds back its switching Frequency down to minimumlevel of 26 kHz.

2 As the power further goes down, the part enters skipcycle while limiting the peak current that insures excellent efficiencyin light load features a timer-based fault detection circuitry thatensures a quasi-flat overload detection, independent of the Fixed - Frequency 65-kHz or 100-kHz Current-Mode ControlOperation Frequency Foldback Down to 26 kHz and Skip Mode to MaximizePerformance in Light Load Conditions Adjustable Over Power Protection (OPP) Circuit High-Voltage Current Source with Brown-Out (BO) Detection Internal Slope Compensation Internal Fixed Soft-Start Frequency Jittering in Normal and Frequency Foldback Modes 64-ms Timer-Based Short-Circuit Protection with Auto-Recovery orLatched Operation Pre-Short Ready for Latched OCP Versions Latched OVP on VCC Autorecovery for C and E Versions Latched OVP/OTP Input for Improved Robustness 35-V VCC Operation 500 mA Peak Source/Sink Drive Capability Internal Thermal Shutdown Extremely Low No-Load Standby Power Pin-to-Pin Compatible with the Existing NCP1236/1247 Series These Devices are Pb-Free and are RoHS CompliantTypical Applications AC-DC Converters for TVs, Set-Top Boxes and Printers Offline Adapters for Notebooks and NetbooksMARKING DIAGRAMSOIC 7 CASE CONNECTIONS1239xfff = Specific Device Codex= A, B, C, D, E, F, G, H, I,J, K, L, M, N, P.

3 Q or Rfff = 065 or 100A= Assembly LocationL= Wafer LotY= YearW= Work WeekG= Pb Free Package1239xfffALYWXG18 HVVCCDRVF aultFBCSGNDORDERING INFORMATION8651342 See detailed ordering and shipping information on page 26 ofthis data 1. Application Schematic (OPP Adjustment) 1. PIN FUNCTION DESCRIPTIONPin NameDescription1 FaultThe Controller enters fault mode if the voltage of this pin is pulled above or below the fault thresholds. Aprecise pull up current source allows direct interface with an NTC thermistor. Fault detection triggers a an optocoupler collector to this pin will allow pin monitors the primary peak current but also offers an overpower compensation adjustment. When theCS pin is brought above V, the part is permanently latched Controller driver s output to an external MOSFET pin is connected to an external auxiliary voltage.

4 An OVP comparator monitors this pin and offers ameans to latch the converter in fault for improved creepage to the bulk capacitor or rectified ac line, this pin powers the internal current source to deliver a start-up current. It is also used to provide the brown-out detection and the HV sensing for the Overpower 2. DEVICE OPTION AND DESIGNATIONSD eviceFre-quencyOCPP rotectionOCPT imerVcc OVPT hresholdVcc OVPP rotectionFault pinProtectionBOLevelsBOTimerSoft startTimerDSSFunc-tionNCP1239AD65R2G65 kHzLatch64 VLatchLatch110 / 10168 ms8 msDisableNCP1239BD65R2G65 kHzAuto Recovery64 VLatchLatch110 / 10168 ms8 msDisableNCP1239CD65R2G65 kHzAuto Recovery64 VAuto RecoveryLatch110 / 10168 ms8 msDisableNCP1239DD65R2G65 kHzAuto Recovery64 VLatchLatch101 / 9568 ms8 msDisableNCP1239ED65R2G65 kHzAuto Recovery64 VAuto RecoveryAuto Recovery110 / 10168 ms8 msDisableNCP1239FD65R2G65 kHzLatch64 ms32 VLatchLatch229 / 17668 ms4 msDisableNCP1239HD65R2G65 kHzLatch64 VLatchLatch229 / 22468 ms8 msDisableNCP1239ID65R2G65 kHzLatch128 VLatchLatch101 / 9568 ms4 msDisableNCP1239JD65R2G65 kHzLatch128 ms32 VLatchLatch101 / 9568 ms8

5 MsEnableNCP1239KD65R2G65 kHzAuto Recovery128 VAuto RecoveryAuto Recovery110 / 10168 ms8 msDisableNCP1239LD65R2G65 kHzAuto Recovery128 VLatchLatch82 / 7768 ms4 msDisableNCP1239MD65R2G65 kHzAuto Recovery128 ms32 VAuto RecoveryAuto Recovery229 / 22468 ms4 msEnableNCP1239ND65R2G65 kHzAuto Recovery128 ms32 VAuto RecoveryLatch229 / 22468 ms4 msEnableNCP1239PD65R2G65 kHzAuto Recovery64 VAuto RecoveryAuto Recovery82 / 7968 ms8 msDisableNCP1239QD65R2G65 kHzAuto Recovery128 VAuto RecoveryAuto Recovery82 / 7968 ms8 msDisableNCP1239RD65R2G65 kHzAuto Recovery128 VLatchLatch101 / 95272 ms4 msDisableNCP1239AD100R2G100 kHzLatch64 VLatchLatch110 / 10168 ms8 msDisableNCP1239BD100R2G100 kHzAuto Recovery64 VLatchLatch110 / 10168 ms8 msDisableNCP1239DD100R2G100 kHzAuto Recovery64 VLatchLatch101 / 9568 ms8 msDisableNCP1239ED100R2G100 kHzAuto Recovery64 VAuto RecoveryAuto Recovery110 / 10168 ms8 msDisableNCP1239GD100R2G100 kHzLatch64 VLatchLatch95 / 86136 ms8 2.

6 Simplified Block DiagramVccDrvLEBGNDCSFBHVDual HV startupcurrent sourceHV sample600 ns timeconstantUp counter4 RSTOVP/OTPgone?FaultVfault(clamp)VFault( OTP)VFault(OVP)IOTPO ption forOVP_VCCUp counter4 RSTVL imit2 LEB120 ns300 nsVLimit1 Soft startRamp8 msSS endVdd/ 4 RupVskipOvercurrentSoft startPWMO scillator65 kHz / 100 kHzCompensationSlopeStopFoldbackJitterSR QQOCP_flagPWMOCPT imer64 msOCP_flagSkipHV detection& samplingBOVcc logicmanagement20us timeconstantTSDVCC(OVP)OVP_VCCOVP_VCC(op tion)VddVddVcc(reset)UVLOSRQQVcc(reset)L atchProtectionModeResetVcc(reset)Timer1 sAuto recoverySRQQC lampClockBOLatchTSDSkipClock+NCBO endBO endUVLOVddIbiasOCP Faultgone?BOTSDTSD endIoppHV sampleDmaxOPP 3. MAXIMUM RATINGSR atingSymbolValueUnitPower Supply Voltage, VCC Pin, Continuous VoltageVCC to 35 VMaximum Voltage on Low Power Pins CS, FB and Fault to Voltage on DRV PinVDRV to 20 VHigh Voltage PinHV to 650 VThermal Resistance Junction-to-AirSingle Layer PCB 25 mm@, 2 Oz Cu Printed Circuit Copper CladR J A250 C/WMaximum Junction TemperatureTJ(max)150 CStorage Temperature RangeTSTG 60 to 150 CESD Capability (Note 2)Human Body Model All Pins Except HVMachine ModelESDHBMESDMM4200kVVCharged-Device Model ESD Capability per jedec JESD22 C101E1kVMoisture Sensitivity LevelMSL1 Stresses exceeding those listed in the Maximum Ratings table may damage the device.

7 If any of these limits are exceeded, device functionalityshould not be assumed, damage may occur and reliability may be Refer to ELECTRICAL CHARACTERISTICS, RECOMMENDED OPERATING RANGES and/or APPLICATION INFORMATION for SafeOperating This device series incorporates ESD protection and is tested by the following methods:ESD Human Body Model tested per jedec JESD22 A114 FESD Machine Model tested per jedec JESD22 A115 CCharged-Device Model ESD Capability tested per jedec JESD22 C101 ELatch-up Current Maximum Rating: 150 mA per jedec standard: JESD78 Figure 3. Negative Pulse for DRV Pin0 VV1-1 V500 ns1,max1,max1,maxVVVV1must stay below V foran all-temperature operationWorst-case()DRVvt= , Tj = 25 C= , Tj = 25 C= , Tj = 125 4. ELECTRICAL CHARACTERISTICS (For typical values TJ = 25 C, for min/max Values TJ = 40 C to +125 C, VHV = 125 V, VCC = 11 V unless otherwise noted)ParameterTest ConditionsSymbolMinTypMaxUnitSTART-UP SECTIONM inimum Voltage for Current Source OperationIHV = 90% ISTART2, VCC = VCC(on) VVHV(min) 2560 VCurrent Flowing Out of VCC PinVCC = 0 Flowing Out of VCC PinVCC = VCC(on) Pin Leakage CurrentVHV = 325 VILEAK1 820mASUPPLY SECTIONS tart-Up ThresholdHV Current Source Stop ThresholdVCC IncreasingVCC(on) Current Source Restart ThresholdVCC DecreasingVCC(min) Operating VoltageVCC DecreasingVCC(off) HysteresisVCC(on) = VCC(off)VCC(hys) VVCC Level for ISTART1 to ISTART2 TransitionVCC(inhibit) Level where Logic Functions are ResetVCC DecreasingVCC(reset)

8 IC ConsumptionVFB= V, FSW= 65 kHzand CL=0 ICC1 IC ConsumptionVFB= V, FSW= 65 kHzand CL=1nFICC2 IC ConsumptionVFB= V, FSW= 100 kHzand CL=0 ICC1 IC ConsumptionVFB= V, FSW= 100 kHzand CL= 1 nFICC2 IC Consumption in Skip CycleVCC = 12 V, VFB = VDriving 8 A/600 V MOSFETICC(stb) 500 mAInternal IC Consumption in Skip CycleL, P and Q versionsVCC = 12 V, VFB = VDriving 8 A/600 V MOSFETICC(stb) 565 mAInternal IC Consumption in Fault ModeFault or LatchICC3 400 mAInternal IC Consumption in Fault ModeL, P and Q versionsFault or LatchICC3 480 mAInternal IC Consumption before Start-UpVCC(min) < VCC < VCC(on)ICC4 310 mAInternal IC Consumption before Start-UpVCC < VCC(min)ICC5 20 mADRIVE OUTPUTRise Time (10 90%)VDRV from 10 to 90%VCC = VCC(off) + V, CL = 1 nFtR 40 nsFall Time (90 10%)VDRV from 90 to 10%VCC = VCC(off) + V, CL = 1 nFtF 30 nsSource ResistanceROH 6 WSink ResistanceROL 6 WPeak Source CurrentDRV High State, VDRV = 0 V (Note 1)VCC = VCC(off) + V, CL = 1 nFISOURCE 500 mAProduct parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted.

9 Product per-formance may not be indicated by the Electrical Characteristics if operated under different Guaranteed by design2. CS pin source current is a sum of IBIAS and IOPP, thus at VHV = 125 V is observed the IBIAS only, because IOPC is switched 4. ELECTRICAL CHARACTERISTICS (continued)(For typical values TJ = 25 C, for min/max Values TJ = 40 C to +125 C, VHV = 125 V, VCC = 11 V unless otherwise noted)ParameterUnitMaxTypMinSymbolTest ConditionsDRIVE OUTPUTPeak Sink CurrentDRV Low State, VDRV = VCC (Note 1)VCC = VCC(off) + V, CL = 1 nFISINK 500 mAHigh State Voltage(Low VCC Level)VCC = 9 V, RDRV = 33 kW DRV High StateVDRV(low) VHigh State Voltage (High VCC Level)VCC = VCC(OVP) V, DRV High State and UnloadedVDRV(clamp) COMPARATORI nput Pull-Up CurrentVCS = VIBIAS 1 mAMaximum Internal Current SetpointTJ from 40 C to +125 C (No OPP) Over-Current Fault ThresholdTJ = +25 C (No OPP) Internal Voltage Set Point forFrequency Foldback Trip Point~59% of VLIMITVFOLD(CS) 475 mVInternal Peak Current Setpoint Freeze~31% of VLIMITVFREEZE(CS)

10 250 mVPropagation Delay from VLIMIT Detection toGate Off-StateDRV Output UnloadedtDEL 50100nsLeading Edge Blanking DurationtLEB1 300 nsAbnormal Over-Current Fault BlankingDuration for VLIMIT3tLEB2 120 nsNumber of Clock Cycles before FaultConfirmationtCOUNT 4 Internal Soft-Start DurationActivated upon startup orauto recovery A, B, C, D, E, G, H, J, K, P or QversionsF, I, L, M, N or R versionstSS 84 msINTERNAL OSCILLATORO scillation Frequency (65-kHz Version)fOSC606570kHzOscillation Frequency (100-kHz Version)fOSC92100108kHzMaximum Duty-CycleDMAX768084% Frequency JitteringIn Percentage of fOSC Jitter isKept even in Foldback ModefJITTER 5 %Swing FrequencyfSWING 240 HzFEEDBACK SECTIONE quivalent AC Resistor from FB to GND(Note 1)REQ 25 kWInternal Pull-Up Voltage on FB PinFB openVFB(ref) VVFB to Current Setpoint Division RatioKFB 4 Feedback Voltage below which the PeakCurrent is FrozenVFREEZE VFREQUENCY FOLDBACKF requency Foldback Level on FB Pin 59% of Maximum PeakCurrentVFOLD VProduct parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted.