NCP1397 - High Performance Resonant Mode Controller with ...

1 Semiconductor Components Industries, LLC, 2015 October, 2015 Rev. 61 Publication Order Number: NCP1397 /DNCP1397A/B, NCV1397A/BHigh Performance ResonantMode Controller withIntegrated High-VoltageDriversThe NCP1397 is a high Performance Controller that can be utilizedin half bridge Resonant topologies such as series Resonant , parallelresonant and LLC Resonant converters. It integrates 600 V gatedrivers, simplifying layout and reducing external component its unique architecture, including a 500 kHz Voltage ControlledOscillator whose control mode permits flexibility when an ORingfunction is required, the NCP1397 delivers everything needed to builda reliable and rugged Resonant mode power NCP1397 provides a suite of protection features withconfigurable settings to optimize any application.

2 These include:auto recovery or fault latch off, brown out, open optocoupler,soft start and short circuit protection. Deadtime is also adjustable toovercome shoot through High Frequency Operation from 50 kHz up to 500 kHz 600 V High Voltage Floating Driver Adjustable Minimum Switching Frequency with 3% Accuracy Adjustable Deadtime from 100 ns to 2 ms. Startup Sequence Via an Externally Adjustable Soft Start Brown Out Protection for a Simpler PFC Association Latched Input for Severe Fault Conditions, Over Temperature or OVP Timer Based Input with Auto Recovery Operation for DelayedEvent Reaction Latched Overcurrent Protection Disable Input for Immediate Event Reaction or Simple ON/OFFC ontrol VCC Operation up to 20 V Low Startup Current of 300 mA 1 A Peak Current Sink/Source Drive Capability Common Collector Optocoupler Connection for Easier ORing Optional Common Emitter Optocoupler Connection Internal Temperature Shutdown NCV Prefix for Automotive and Other Applications RequiringUnique Site and Control Change Requirements.

3 AEC Q100 Qualified and PPAP Capable These Devices are Pb Free, Halogen Free/BFR Free and are RoHSCompliantTypical Applications Flat Panel Display Power Converters High Power ac dc Adapters for Notebooks Computing Power Supplies Industrial and Medical Power Sources Offline Battery ChargersPIN CONNECTIONSMARKING DIAGRAMSx= P (standard) or V (automotive)y= A or BA= Assembly LocationWL= Wafer LotY= YearWW= Work WeekG= Pb Free PackageSO 16, LESS PIN 13D SUFFIXCASE 751AM116123456781615141211109(Top View)BOCSS(dis)FmaxCtimerRtFBDTSkip/Disa bleVbootMupperVCCM lowerFaultHBGNDSee detailed ordering and shipping information in the packagedimensions section on page 26 of this data , NCV1397 1.

4 Typical Application ExampleR18 PIN FUNCTION DESCRIPTIONPin #Pin NameFunctionPin Description1 CSS(dis)Soft Start DischargeSoft start capacitor discharge pin. Connect to the soft start capacitor to reset itbefore startup or during overload frequency clampA resistor sets the maximum frequency excursion3 CtimerTimer durationSets the timer duration in presence of a fault4 RtMinimum frequency clampConnecting a resistor to this pin, sets the minimum oscillator frequency reachedfor VFB = 1 OutDetects low input voltage conditions. When brought above Vlatch (4 V typically), itfully latches off the current into this pin increases the oscillation frequency up to simple resistor adjusts the dead time width8 Skip/DisableSkip or Disable inputUpon release, a clean startup sequence occurs if VFB < V.

5 During the skipmode, when FB doesn t drop below V, the IC restarts without soft detection inputWhen asserted, the external timer starts to countdown and shuts down thecontroller at the end of its time duration. Simultaneously the Soft Start dischargeswitch is activated so the converter operating frequency goes up to protectapplication power stage. This input features also second fault comparator withhigher threshold ( V typically) that:A) Speeds up the timer capacitor charging current 8 times NCP1397AB) latches off the IC permanently NCP1397 BIn both versions the second fault comparator helps to protect application in caseof short circuit on the output or transformer secondary ground 11 MlowerLow side outputDrives the lower side MOSFET12 VCCS upplies the controllerThe Controller accepts up to 20 V13 NCNot connectedIncreases the creepage distance14 HBHalf bridge connectionConnects to the half bridge output15 MupperHigh side outputDrives the higher side MOSFET16 VbootBootstrap pinThe floating VCC supply for the upper stageNCP1397A/B, NCV1397 2.

6 Internal Circuit Architecture (NCP1397A)VrefRtVDDCIDT ++DT = Imax for Vfb = VI = 0 for Vfb < Vfb(min)IminVFB VFB(o)VrefVDDImaxVFB = 5 FmaxVDDI timer1 +Timer+VrefPON ResetVtimer OFFR esetSS(dis)FBRFB ++VFB(fault) +G = 1> 0 onlyV=V (FB) VFB(min)IDTVrefVDD+VFB(min)DTDeadtimeAdj ustmentVDD +BO+VBO ++VlatchClkDSQQRSQQRPON Reset50% DCTemperatureShutdownVCCM anagementPONR esetFaultTimeoutFaultVrefBOResetFF+ +Vref Skip/DisableSkip/DisableVCCT imeoutFaultFaultMlowerGNDIBO20 ns NoiseFilter+ Fault+Vref(fault)NCVBOOTM upperHBUVLOFastFault+ +Vref(OCP)VddItimer2 LevelShifter20 ms NoiseFilterFaultPON ResetEnable(if Vfb< )20 ms NoiseFilter1 ms NoiseFilterNCP1397A/B, NCV1397 3.

7 Internal Circuit Architecture (NCP1397B)VrefRtVDDCIDT ++DT = Imax for Vfb = VI = 0 for Vfb < Vfb_minVrefIminVFB VFB(o)VrefVDDImaxVfb = 5 FmaxVDDI timer1If FAULT Itimer else 0 +Timer+VrefSS(dis)FBRFB ++VFB(fault) +G = 1> 0 onlyV=V (FB) VFB(min)IDTVrefVDD+VFB(min)DTDeadtimeAdj ustmentVDD +BO+VBO ++VlatchClkDSQQRSQQRPON Reset50% DCTemperatureShutdownVCCM anagementPONR esetFaultTimeoutFaultVrefBOResetFF+ +Vref SkipSkip/DisableVCCT imeoutFaultFaultMlowerGNDIBO20 ns NoiseFilter+ Fault+Vref(fault)NCVBOOTM upperHBUVLOL evelShifterFastFault+ +Vref(OCP)PON ResetVtimer OFFR esetFaultPON ResetEnable(if Vfb< )20 ms NoiseFilter20 ms NoiseFilter1 ms NoiseFilterNCP1397A/B, NCV1397 RATINGSR atingSymbolValueUnitHigh Voltage bridge pin, pin 14 VBRIDGE 1 to 600 VFloating supply voltage, ground referencedVBOOT VBRIDGE0 to 20 VHigh side output voltageVDRV(HI)VBRIDGE toVBOOT+ side output voltageVDRV(LO) to VCC+ output slew ratedVBRIDGE/dt50V/nsPower Supply voltage, pin 12 VCC20 VMaximum voltage, all pins (except pin 11 and 10) to 10 VThermal Resistance Junction to Air, SOIC versionRqJA130 C/WStorage Temperature Range 60 to +150 CESD Capability, Human Body Model (HBM) (All pins except HV pins) 2kVESD Capability, Machine Model (MM)

8 200 VStresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionalityshould not be assumed, damage may occur and reliability may be This device(s) contains ESD protection and exceeds the following tests:Human Body Model 2000 V per JEDEC Standard JESD22 A114 EMachine Model 200 V per JEDEC Standard JESD22 A115 A2. This device meets latchup tests defined by JEDEC Standard , NCV1397 CHARACTERISTICS (For typical values TJ = 25 C, for min/max values TJ = 40 C to +125 C, Max TJ = 150 C, VCC = 12 V unless otherwise noted)SymbolRatingPinMinTypMaxUnitSUPPLY SECTIONVCC(on)Turn on threshold level, VCC going (min)Minimum operating voltage after turn (on)Startup voltage on the floating section16 148910 VVboot(min)Cutoff voltage on the floating section16 current, VCC < VCC(on)12 300mAVCC(reset)

9 VCC level at which the internal logic gets reset12 VICC1 Internal IC consumption, no output load on pin 15/14 11/10,FSW = 300 kHz12 4 mAICC2 Internal IC consumption, 1 nF output load on pin 15/14 11/10,FSW = 300 kHz12 11 mAICC3 Consumption in fault or disable mode (All drivers disabled,Rt = 34 kW, RDT = 10 kW)12 mAVOLTAGE CONTROL OSCILLATOR (VCO)FSW(min)Minimum switching frequency, Rt = 34 kW on pin 4, Vpin6 = V,DT = 300 (max)Maximum switching frequency, Rf(max) = kW on pin 2, Vpin6 > V, Rt = 34 kW, DT = 300 ns2440500560kHzFBSWF eedback pin swing above which Df = 06 VDCO perating duty cycle symmetry11 15485052%Tdel1 Delay before driver restart from fault or disable mode 700 nsTdel2 Delay before driver restart after VCC(on) event (Note 4) 11 msVref(Rt)Reference voltage for Rt SECTIONRFBI nternal pulldown resistor6 20 kWVFB(min)Voltage on pin 6 below which the FB level has no VCO action6 VVFB(off)Voltage on pin 6 below which the Controller considers the FB fault6240280320mVVFBoff(hyste)

10 Feedback fault comparator hysteresis6 45 mVDRIVE OUTPUTTrOutput voltage risetime @ CL = 1 nF, 10 90% of output signal15 14/11 10 40 nsTfOutput voltage falltime @ CL = 1 nF, 10 90% of output signal15 14/11 10 20 nsROHS ource resistance15 14/11 10 13 WROLSink resistance15 14/11 10 WTdeadDeadtime with RDT = 10 kW from pin 7 to GND7250290340nsTdead(max)Maximum deadtime with RDT = 82 kW from pin 7 to GND7 2 msTdead(min)Minimum deadtime, RDT = 3 kW from pin 7 to GND7 100 nsIHV(LEAK)Leakage current on high voltage pins to GND14, 15,16 5mAProduct parametric Performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted.