LT8316 (Rev. A) - Analog Devices

1 LT83161 Rev. BFor more information FeedbackFEATURESDESCRIPTION560 VIN Micropower No-Opto Isolated Flyback ControllerThe LT 8316 is a micropower, high voltage flyback con-troller. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated fly-back waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces transformer size, and maintains high start-up, the LT8316 charges its INTVCC capacitor via a high voltage current source. During normal operation, the current source turns off and the device draws its power from a third winding on the transformer minimiz-ing standby power dissipation. The LT8316 operates from a wide range of input supply voltages and can deliver up to 100W of power. It is avail-able in a thermally enhanced 20-pin TSSOP package with additional pins removed for high-voltage nWide Input Voltage Range: 16V to 560V (600V max) nNo Opto-Isolator Required for Regulation nQuasi-Resonant Boundary Mode Operation nConstant-Current and Constant-Voltage Regulation nLow-Ripple Light Load Burst Mode Operation nLow Quiescent Current.

2 75 A nProgrammable Current Limit and Soft-Start nTSSOP Package with High-Voltage Spacing nAvailable in 20(15)-Lead Package with Extended Creepage Distance nAEC-Q100 Compliant with Exception nHBM ESD Classification Level 1C nIsolated Telecom, Automotive, Industrial, Medical Power Supplies nIsolated Off-Line Housekeeping Power Supplies nElectric Vehicles and Battery Stacks nMultioutput Isolated Power Supplies for Inverter Gate DrivesAll registered trademarks and trademarks are the property of their respective APPLICATION 16 VIN to 560 VIN Isolated 12 VOUT F1300 F540 TO 560 VVOUT+VOUT 8:1:112 VUP TO 800mA (VIN = 20V)UP TO 3A (VIN = 80V)UP TO 4A (VIN = 160V TO 560V)8316 TA01aVIN = 20 VVIN = 80 VVIN = 160 VVIN = 320 VVIN = 560 VLOAD CURRENT (A)0123456707580859095 EFFICIENCY (%)8316 TA01bLT83162 Rev. BFor more information 20(16), 20(15)-Lead Plastic TSSOPESD MODELWITHSTAND THRESHOLD (V)CLASSHBM* 10001 CFICDM 1250C3*All pins with the exception of VIN pins pass up to 4000V Class DISCHARGE RATINGSPIN CONFIGURATIONABSOLUTE MAXIMUM RATINGSVIN (Note 2).

3 600 VBIAS, EN/UVLO ..40V INTVCC ..15 VSMODE ..INTVCC SENSE, TC, FB, VC, IREG/SS ..4 VDCM .. 100mAOperating Junction Temperature (Note 3) LT8316E, LT8 316I .. 40 C to 125 C LT8316H .. 40 C to 150 CStorage Temperature Range .. 65 C to 150 CLead Temperature (Soldering, 10 sec) ..300 C(Note 1)(Note 4)FE PACKAGE20(16)-LEAD PLASTIC TSSOP JA = 38 C/W, JC = 10 C/WEXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCBTOP VIEW20 GND19 GATE18 SENSE17 EN/UVLO16 SMODE15 GND14 IREG/SS13 VC12 FB11 TCVIN 1 VIN 2 VIN 3 INTVCC 8 BIAS 9 DCM 1021 GNDF PACKAGE20(15)-LEAD PLASTIC TSSOP JA = 88 C/WTOP VIEW20 GND19 GATE18 SENSE17 EN/UVLO16 SMODE15 GND14 IREG/SS13 VC12 FB11 TCVIN 1 VIN 2 INTVCC 8 BIAS 9 DCM 10 ORDER INFORMATIONLEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELT8316 EFE#PBFLT8316 EFE#TRPBFLT8316FE20-Lead Plastic TSSOP 40 C to 125 CLT8316 IFE#PBFLT8316 IFE#TRPBFLT8316FE20-Lead Plastic TSSOP 40 C to 125 CLT8316 HFE#PBFLT8316 HFE#TRPBFLT8316FE20-Lead Plastic TSSOP 40 C to 150 CLT8316IF#PBFLT8316IF#TRPBFLT8316F20-Lea d Plastic TSSOP 40 C to 125 CESD (electrostatic discharge)

4 Sensitive Devices and circuit boards can dischargewithout detection. Although this product featurespatented or proprietary protection circuity, damagemay occur on Devices subjected to high energy , proper ESD precautions should be taken to avoid performance degradtion or loss of functionalityESD CAUTIONLT83163 Rev. BFor more information CHARACTERISTICSORDER INFORMATION The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C. BIAS = 30V, VEN/UVLO = 30V unless otherwise noted. SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSB IASChip Bias Voltage Supply RangeAfter Quiescent CurrentBurst Mode Operation Active75 470150 700 A AICLAMP(MAX)BIAS Clamp Maximum Current15mAVCLAMPBIAS Clamping VoltageICLAMP = 200 A ICLAMP = 15mA34 3538 39V VISHDNVIN Shutdown CurrentVEN/UVLO < , BIAS = Floating1220 AVIN(MIN)

5 Minimum Input Voltage for StartupBIAS = Floatingl16 VISTARTUPS tartup Current Out of INTVCCVIN = 16V, BIAS = Floatingl100300 AVUVLOEN/UVLO Threshold EN/UVLO HysteresisVEN/UVLO Falling VEN/UVLO 120V mVINTVCC UVLO Rising ThresholdStartup Current through Depletion UVLO Falling Regulation VoltageDrawing 20mA from LDO Dropout VoltageDrawing 20mA from INTVCC1 VGate Driver Rise TimeCGATE = , 10% to 90%30nsGate Driver Fall TimeCGATE = , 90% to 10%8nsVREGFB Regulation Error Amplifier TransconductanceVFB = 5mV245350455 SVTCTC Voltage TC Voltage Temperature CoefficientTA = 25 + mV/ CITCTC Sinking/Sourcing Current 100 AIIREG/SSIREG/SS CurrentCurrent AIDCMF lyback Collapse Detection Threshold Resonant Valley Detection ThresholdIDCM Rising IDCM Falling 170 85 A AVSENSE(MIN)Minimum Current Voltage Threshold142026mVVSENSE(MAX)Maximum Current Voltage Threshold90100110mVSENSE Input Bias CurrentCurrent Out-of-Pin35 ALEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGEAUTOMOTIVE PRODUCTS** LT8316 EFE#WPBFLT8316 EFE#WTRPBFLT8316FE20-Lead Plastic TSSOP 40 C to 125 CLT8316 IFE#WPBFLT8316 IFE#WTRPBFLT8316FE20-Lead Plastic TSSOP 40 C to 125 CLT8316IF#WPBFLT8316IF#WTRPBFLT8316F20-L ead Plastic TSSOP 40 C to 125 CContact the factory for parts specified with wider operating temperature ranges.

6 *The temperature grade is identified by a label on the shipping and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.**Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these BFor more information PERFORMANCE CHARACTERISTICSS witching FrequencyBoundary Mode WaveformsLoad and Line RegulationOutput Voltage vs TemperatureCV/CC OperationTA = 25 C, unless otherwise PAGE APPLICATIONLOAD CURRENT (A) VOLTAGE (V)8316 G01 VIN = 20 VVIN = 80 VVIN = 160 VVIN = 320 VVIN = 560 VFRONT PAGE APPLICATIONVIN = 320 VTEMPERATURE ( C) 50 VOLTAGE (V)8316 G02 IOUT = 100mAIOUT = 1 AIOUT = 4 AVIN = 320 VRIREG/SS = FRONT PAGE APPLICATIONLOAD CURRENT (A)012345603691215 OUTPUT VOLTAGE (V)8316 G03 FRONT PAGE APPLICATIONVIN = 20 VVIN = 80 VVIN = 160 VVIN = 320 VVIN = 560 VLOAD CURRENT (A)0123456020406080100 FREQUENCY (kHz)

7 8316 G04 FRONT PAGE APPLICATIONVIN = 320V, IOUT = 4A5 s/DIVVSENSE100mV/DIVVOUTAC COUPLED50mV/DIVVSW200V/DIV8316 G05 Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and 2: Absolute maximum voltage at the VIN pin is 600V for transient operation and 560V for continuous 3: The LT8316E is guaranteed to meet performance specifications from 0 C to 125 C junction temperature. Specifications over the 40 C to 125 C operating junction temperature range are assured by design characterization and correlation with statistical process controls. The LT8316I is guaranteed over the full 40 C to 125 C operating junction temperature range. LT8316H is guaranteed to meet performance specifications over the full 40 C to 150 C operating temperature range High junction temperatures degrade operating lifetimes.

8 Operating lifetime is derated at junction temperatures greater than 125 4: Human body model (HBM) per ANSI/ESDA/JEDEC JS-001. Field induced charged device model (FICDM) per ANSI/ESDA/JEDEC CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C. BIAS = 30V, VEN/UVLO = 30V unless otherwise noted. SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSF SW(MIN)Minimum Switching FrequencyBurst Mode Standby Mode3 2204 250kHz HzFSW(MAX)Maximum Switching Frequency138140142kHzLT83165 Rev. BFor more information Mode WaveformsBurst Mode WaveformsFRONT PAGE APPLICATIONVIN = 320V, IOUT = 2A5 s/DIVVSENSE100mV/DIVVOUTAC COUPLED50mV/DIVVSW200V/DIV8316 G06 FRONT PAGE APPLICATIONVIN = 320V, IOUT = 30mA100 s/DIVVSENSE100mV/DIVVOUTAC COUPLED50mV/DIVVSW200V/DIV8316 G07 TYPICAL PERFORMANCE CHARACTERISTICSVIN Pin Shutdown CurrentBIAS Pin Quiescent CurrentDepletion Startup CurrentLoad Transient ResponseStartup WaveformsTA = 25 C, unless otherwise COUPLED200mV/DIV8316 G08 FRONT PAGE APPLICATIONVIN = 320V, ROUT= 3 50ms/DIVVIN320V/DIVVINTVCC10V/DIVVBIAS10 V/DIVVOUT10V/DIV8316 G09 TEMPERATURE ( C) 50 250255075100125150015304560 SHUTDOWN CURRENT ( A)8316 G10 VIN = 100 VVIN = 560 VTEMPERATURE ( C) 50 25025507510012515004080120160 QUIESCENT CURRENT ( A)8316 G11 VINTVCC (V) (mA)8316 G12150 C25 C 55 CLT83166 Rev.

9 BFor more information PERFORMANCE CHARACTERISTICSM inimum Switch-On TimeMinimum Switch-Off TimeDCM Pin ThresholdTA = 25 C, unless otherwise ( C) 50 2502550751001251500501001502002503003504 00 MINIMUM ON TIME (ns)8316 G19 TEMPERATURE ( C) 50 2502550751001251505005506006507007508008 50900 OFF TIME (ns)8316 G20 RESONANT VALLEY DETECTFLYBACK COLLAPSE DETECTTEMPERATURE ( C) 50 250255075100125150 220 200 180 160 140 120 100 80 60 40 200 DCM CURRENT ( A)8315 G21 IREG/SS Pin CurrentSwitching Frequency LimitSwitch Current LimitTEMPERATURE ( C) 50 CURRENT ( A)8316 G16 MAXIMUM SWITCHING FREQUENCYMINIMUM SWITCHING FREQUENCYTEMPERATURE ( C) 50 2502550751001251500123451251301351401451 50 FREQUENCY (kHz)8316 G17 MAXIMUM CURRENT LIMITMINIMUM CURRENT LIMITTEMPERATURE ( C) 50 2502550751001251500510152025859095100105 110 SENSE VOLTAGE (mV)8316 G18 ULVO ThresholdFB Regulation VoltageTC Pin VoltageEN/UVLO RisingEN/UVLO FallingTEMPERATURE ( C) 50 THRESHOLD (V)8316 G13 TEMPERATURE ( C) 50 REGULATION VOLTAGE (V)8316 G14 TEMPERATURE ( C) 50 VOLTAGE (V)8316 G15LT83167 Rev.

10 BFor more information FUNCTIONSVIN (Pins 1, 2, 3): Drain of the 560V Internal Startup FET. During startup, an internal depletion MOSFET draws power from this pin to charge the INTVCC (Pin 8): Internal Gate Driver Bias Voltage. During start-up, current from the VIN pin charges this pin to 12V. During operation, a linear regulator from BIAS maintains this voltage at 10V. Bypass locally with a F ceramic 15V rated (Pin 9): Unregulated Input Voltage for the IC. This pin derives power from a third winding on the trans-former to provide power to INTVCC. Bypass locally with a 100nF (Pin 10): Discontinuous Conduction Mode Detector. This pin detects the dV/dt of the switching waveform, ensuring accurate output voltage sampling and quasi-resonant boundary-mode switching. Connect a capacitor with series resistance from this pin to the third winding.