Rev. 1.10 1 August 23, 2012 Rev. 1.00 PB August 23, 2012

HT7L2103Anti-EMI, High Efficiency Dimmable

LED Lighting Driver with Primary-Side Constant Control and Green Mode

Feature FrequencyJitterforEMIRestriction

IntegratedSoft-StartFunction

VeryLowOperatingCurrentandStart-upCurrent(

Rev. 1.10 2 August 23, 2012

HT7L2103

Block Diagram Pin Assignment

32V

UVLO

14V / 8V

Internal Bias& Vref

Green ModeOSC

LEB350ns

S

R

Q

DriverStage

VREF

VCC

GD

GND

VCC

RT

FB/PDM

ISENSE

MF

OCP Level = 1VFB Compare Level = 2.5V

Slope Compensation

3

6

7

2

1

4

5

Soft-Start

Frequency Jitter

Internal OTPSCPOCP

OVP

8

Constant Current

Controller

Multi-FunctionInterface

Pin DescriptionPin No. Pin Name Description

1 FB/PDM Voltage Feedback Pin. Connected to a Photo-Coupler for closed-loop control. This pin also can be used as a PWM Dimming Pin.

2 MFMulti-Function Pin. By Connecting this pin to different system sensing points, the HT7L2013 can be used for different circuit topologies such as Isolation Flyback or Non-Isolation DC-DC Buck/Boost/Buck-Boost.

3 ISENSEA voltage proportional to the inductor current is connected to this input. The Constant Current Controller uses this voltage information to keep the system output current within a narrow range.

4 RT The oscillator frequency is programmed by connecting a resistor RT between this pin and ground. A maximum frequency of 500KHz is possible.

5 GND Combined control circuitry and power ground.

6 GD Power MOSFET gate driver output.

7 VCC Positive Supply.

8 VREF A Temperature-Independent Voltage Reference output.

Absolute Maximum RatingsSupplyVoltageVCC................................................................................................................................ -0.3V~30.0V

FB/PDM,RT,ISENSEPins....................................................................................................................... -0.3V~5.5VMFPin....................................................................................................................................................... -0.3V~5.0VJunctionTemperature.......................................................................................................................................... 150COperatingAmbientTemperature............................................................................................................... -40C~85CStorageTemperatureRange.................................................................................................................... -65C~150CPackageThermalResistance(8-PinSOP)..................................................................................................... 160C/WESDProtection:

HumanBodyModel......................................................................................................................................3kVMachineModel...........................................................................................................................................200V

Note:Thesearestressratingsonly.StressesexceedingtherangespecifiedunderAbsoluteMaximumRatings

maycausesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyond

thoselistedin thespecificationisnot impliedandprolongedexposuretoextremeconditionsmayaffect

devicereliability.

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HT7L2103

Electrical CharacteristicsUnless otherwise stated, this specifications apply for 0C Ta 70C, VCC=15V, RT=10kW

Symbol Parameter Test Condition Min. Typ. Max. UnitSupply Voltage (VCC Pin)IST Startup Current VCC=12.9V 12 30 mA

ICC Operating CurrentVFB/PDM=0V 2.0 3.0 mAVFB/PDM=3V 2.5 mA

VTL UVLO (Off) 7 8 9 VVTH UVLO (On) 13 14 15 VVCC OVP Trip Level VCC(Over Voltage Protection) 26.5 28.0 29.5 VtD-OVP OVP Strobe Time 100 msVoltage Reference (VREF Pin)VREF Output Voltage Tj=25C, IO=1mA 5.5 VVREF Line Regulation 12V VCC 25V 3.0 20 mVVREF Load Regulation 1mA IO 10mA 4.0 25 mVCurrent Sensing (ISE NSE Pin)VIS(OFF) Maximum Input Voltage 0.9 1.0 1.1 VtLEB Leading Edge Blanking Time 350 ns

Delay to Output 100 nsOscillator (RT pin)fOSC Oscillator Frequency Tj=25C, RT=10kW to GND (see note *) 49 52 55 kHz

fOSCTA

Temperature Stability -40C ~105C 5.0 %

fOSCVREF

Voltage Stability VCC=10V~25V 0.2 1.0 %/V

DMAX Maximum Duty 75 %Frequency Jitter 4 %

Gate Drive Output (GD Pin)VOL Output Low Level VCC=15V, Isink=20mA 1 VVOH Output High Level VCC=15V, Isource=20mA 9.0 Vtr Rising Time Tj=25C, Load Capacitance=1nF 50 150 nstf Falling Time Tj=25C, Load Capacitance=1nF 50 150 nsVoltage Feedback (FB/PDM Pin)ISINK Short Circuit Current VFB/PDM=0V 1.5 2.2 mAVFB/PDM Open Loop Voltage FB/PDM pin open 5.5 VSCP (Short Circuit Protection)VFB/PDM SCP Trip Level VFB/PDM (SCP) 4.7 V

SCP Delay Time (See Note) fS=52kHz 75 msSoft-StarttSTART Soft-Start Time RT=10kW 10 msInternal OTP(Over Temperature Protection)tPOn OTP Trigger Temperature 150 CtP-Hys OTP Temperature Hysteresis 30 CMulti-Function PinVREFA Reference Voltage VFB/PDM=2.5V 2.42 2.50 2.58 VISINKA Output Sink Current VFB=2.7V, VFB/PDM=1.1V 2.0 7.0 mAISOURCEA Output Source Current VFB=2.3V, VFB/PDM=4.8V -0.5 -1.0 mAVOHA VFB/PDM High Voltage VFB=2.3V, RL=15kW to GND 4.8 5.0 VVOLA VFB/PDM Low Voltage VFB=2.3V, RL=15kW to VREF 0.8 1.1 VAVO DC Gain 150 dB

Note:TheseParameters,althoughguaranteed,arenot100%testedinproduction.

"*"Suggesttolimitswitchingfrequencyunder75kHzforGreenModeoperation.

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HT7L2103

Typical Performance Characteristics

Figure 1. UVLO (on) (V) vs Temperature

Figure 3. Frequency vs Temperature

Figure 5. VFB/PDM for SCP vs Temperature

Figure 2. UVLO (off) (V) vs Temperature

Figure 4. Frequency vs VCC

Figure 6. Green Mode Frequency vs VCC

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HT7L2103

Application Information

Operation OverviewTheHT7L2013 isahighly functionally integratedPWMcontrollerforLEDlightingandisoptimizedtorestrictEMI.Thedeviceusesaprimarysidefeedbackdesignwithconstantcurrentcontroltoreduceexternalcomponent requirements and tomaintain currentaccuracy. It is recommended forE27 retrofit lampuse.ThePWMdimming range is1% to99%andprovideslessthan1%dimmingprecision.ItsinternalfeaturesincludeGreenmode(Non-Acoustic-Noise),internal slopecompensation,highefficiencyunderdifferent loadconditionswithin awideoperatingtemperature rangeof -40C to85C.Thedevicesalso includesa rangeofprotection functions,SCP,OVP,UVLO,currentlimit,LEB,softstart,OTPforinternal thermal sensing ,notonlyenhancesystemexcellentperformance,butalsoensurehighstabilityof thewholecircuitapplicationevenunderextremeenvironmentalconditionssuchashightemperatureorhighEMIlevels.

Advanced Precision Oscillator for Green-Mode Switching and Non-Acoustic Noise RequirementATrimmedPrecisionGreenModeOscillator isimplementedinthedevicetoenhancetheconversionefficiencyunder light loadconditions.AsFigure7shows, theefficiencydifferencebetweenlight loadsandheavy loads is less than1%,while theaverageefficiencyisonly89.5%,thepeakefficiencyis90%.

Figure 7 Efficiency Performance between Light-Load and Heavy-Load

TheGreenModeOscillator typessuppliedbyotherPWMControllerprovidersareplaguedbyAcoustic-Noiseproblems.This isbecause,under light loadconditions, the frequencywill keep decreasingthrough theHumanAcousticRange (from20Hzto20kHz),and theseaudio frequenciesmaycreateaudiblenoiseinthetransformer.HolteksHT7L2103patentedGreenModeOscillatordesignedusinganadvancedNon-AcousticNoise structurepreventsthegenerationoffrequenciesintheaudiofrequencyband,thuseliminatinganytransformernoise.

Figure 8. Oscillator Behavior Compared with HT7L2103 and Other Green Mode PWM Controller

Frequency Jitter for EMI RestrictionEMIrestriction isaccomplishedusingaFrequencyJitterfunction,whichspreadstheenergyoverawiderfrequency range than thebandwidthmeasuredbytheEMItestequipment.AninternalFrequencyJittercircuitchangestheswitchingfrequencybetween+4%and -4%of thecentral frequencywithaperiodof4ms.

Figure 9 Frequency Jitter Function Spreads Energy Over a Period to Accomplish EMI Restraining

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HT7L2103

Under Voltage Lockout (UVLO)AnUVLOcomparatorisimplementedin toensurethat thedevice is fullyfunctionalbefore theoutputstage isenabled.Asshown inFig.10,ahysteresisis provided toprevent thePWMController fromshuttingdownduringanyvoltagedipswhichmightoccurduringstartupprocess.The turn-onand turn-off threshold levels are set at 16.0V and 10.0V,respectively.

Figure 10. UVLO Scheme and Start-Up Current

Current Sense and Leading-Edge Blanking (LEB)ALeading-EdgeBlankingScheme is integrated inthedevicetopreventfalsetriggeringduetofeedbackcurrent spikeswhichmay appear on theCSpin,furthereliminatingtheneedforanR-Cfilterwhichisalwaysarequirement in traditionalcurrentmodePWMControllerapplications.

Figure 11. LEB with R-C Filter Removed

Internal Slope-CompensationAn important issuewith thecurrentmodecontrolstructures is the instabilitydue toSub-HarmonicOscillationwhentheDuty-Cycle>50%.Topreventthisproblemfromoccurring,aSlope-Compensationfunction isalwaysnecessary. In traditionalcurrentmodePWMControllerapplication,manyexternalcomponents arenecessary to implement aSlope-Compensationfunction,However in theHT7L2103theinternalSlope-Compensationeliminatestheneedfortheseexternalcomponentsresultinginasimplifiedtheapplicationcircuitdesign.

Short-Circuit Protection (SCP) and Over-Load Protection (OLP)Toprotect all thedevices ina system frombeingdamagedduetooverloadorshortcircuitconditions,asmartSCPfunctionis implemented in thedevice.HerethefeedbacksystemwillforcethevoltagelooptomovetowardasaturationvalueandthenpullupthevoltageontheCOMPpin.WhenevertheVCOMPincreases to theSCPthresholdof4.7Vandremainsthereforlongerthan40ms,theprotectionschemewillactivateandthenturnoffthegateoutputtostopthepowercircuitswitching.Byusingsuchaprotectionmechanism,theaverageinputpowercanbereducedtoaverylowlevelsothatthecomponenttemperatureandstresscanbecontrolledwithin safeoperatinglevels.

Figure 12. SCP Function Behavior

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HT7L2103

VCC Pin Over-Voltage Protection (OVP)VCCOver-VoltageProtection is integrated in thedevice topreventcomponentsdamagedue toovervoltage conditions on theVCCpin.TheOVP istriggeredwhenVCCreaches28Vandlastsfor100ms,ThePWMpulsesaredisabledwhenOVPisenabled.

Internal Over-Temperature Protection (OTP)An InternalOver-Temperature Protection (OTP)functionisintegratedinthedevice.Whenthedevicejunction temperature rises higher than theOTPtrigger level, theOTPCircuitwill turnoff thegatedriveoutput thussimultaneouslyswitchingoff thepowerMOSFET.Thedevicewill recoverwhen thetemperature isbelowtheOTPthresholdwhereuponthePWMsignalwillresumeoperation.

Oscillator Frequency TuningBychoosing an appropriate value of an externalresistorbetween theRTPinandGND,a suitableoperatingfrequencycanbegenerated.TherelationshipbetweenthevalueofRTandtheoperatingfrequencyisprovidedinFigure13.

Figure 13. RT Resistor value vs Operating Frequency

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HT7L2103

Package InformationNotethat thepackageinformationprovidedhereisforconsultationpurposesonly.Asthis informationmaybeupdatedatregularintervalsusersareremindedtoconsulttheHoltekwebsite(http://www.holtek.com.tw/english/literature/package.pdf)forthelatestversionofthepackageinformation.

8-pin SOP (150mil) Outline Dimensions

MS-012

SymbolDimensions in inch

Min. Nom. Max.A 0.228 0.244B 0.150 0.157C 0.012 0.020C' 0.188 0.197D 0.069E 0.050 F 0.004 0.010G 0.016 0.050H 0.007 0.010 0 8

SymbolDimensions in mm

Min. Nom. Max.A 5.79 6.20B 3.81 3.99C 0.30 0.51C' 4.78 5.00D 1.75E 1.27 F 0.10 0.25G 0.41 1.27H 0.18 0.25 0 8

Rev. 1.10 9 August 23, 2012

HT7L2103

Reel Dimensions

SOP 8N (150mil)Symbol Description Dimensions in mm

A Reel Outer Diameter 330.01.0 B Reel Inner Diameter 100.01.5 C Spindle Hole Diameter 13.0 +0.5/-0.2 D Key Slit Width 2.00.5 T1 Space Between Flange 12.8 +0.3/-0.2 T2 Reel Thickness 18.20.2

Rev. 1.10 10 August 23, 2012

HT7L2103

Carrier Tape Dimensions

SOP 8N (150mil)Symbol Description Dimensions in mm

W Carrier Tape Width 12.0+0.3/-0.1

P Cavity Pitch 8.00.1E Perforation Position 1.750.10F Cavity to Perforation (Width Direction) 5.50.1D Perforation Diameter 1.550.1D1 Cavity Hole Diameter 1.50 +0.25/-0.00

P0 Perforation Pitch 4.00.1P1 Cavity to Perforation (Length Direction) 2.00.1A0 Cavity Length 6.40.1B0 Cavity Width 5.20.1K0 Cavity Depth 2.10.1t Carrier Tape Thickness 0.300.05C Cover Tape Width 9.30.1

Rev. 1.10 11 August 23, 2012

HT7L2103

Holtek Semiconductor Inc. (Headquarters)No.3, Creation Rd. II, Science Park, Hsinchu, TaiwanTel: 886-3-563-1999Fax: 886-3-563-1189http://www.holtek.com.tw

Holtek Semiconductor Inc. (Taipei Sales Office)4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, TaiwanTel: 886-2-2655-7070Fax: 886-2-2655-7373Fax: 886-2-2655-7383 (International sales hotline)

Holtek Semiconductor (China) Inc. (Dongguan Sales Office)Building No.10, Xinzhu Court, (No.1 Headquarters), 4 Cuizhu Road, Songshan Lake, Dongguan, China 523808Tel: 86-769-2626-1300Fax: 86-769-2626-1311, 86-769-2626-1322

Holtek Semiconductor (USA), Inc. (North America Sales Office)46729 Fremont Blvd., Fremont, CA 94538, USATel: 1-510-252-9880Fax: 1-510-252-9885http://www.holtek.com

Copyright 2012 by HOLTEK SEMICONDUCTOR INC.The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek's products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.

FeatureApplicationsGeneral DescriptionApplication CircuitsBlock DiagramPin AssignmentPin DescriptionAbsolute Maximum RatingsElectrical CharacteristicsTypical Performance CharacteristicsApplication InformationOperation OverviewAdvanced Precision Oscillator forGreen-MFrequency Jitter for EMI RestrictionUnder Voltage Lockout (UVLO)Current Sense and Leading-Edge Blanking Internal Slope-CompensationShort-Circuit Protection (SCP) andOver-LVCC Pin Over-Voltage Protection (OVP)Internal Over-Temperature Protection (OTOscillator Frequency Tuning

Package Information8-pin SOP (150mil) Outline DimensionsReel DimensionsCarrier Tape Dimensions