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| june2011 ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 fan7319lcdbacklightinverterdriveic fan7319 lcdbacklightinverterdriveic features highefficiencysinglestagepowerconversion wideinputvoltagerange:10vto24v backlightlampballastandsoftdimming minimalrequiredexternalcomponents precisionvoltagereferencetrimmedto2% zvsorzcspushpull&fullbridgetopology pwmcontrolatfixedfrequency zcscontrolbysensingresonanttankcurrent externalpulseburstdimmingfunctionpositive analogdimmingfunctionpositive programmablestrikingfrequency openlampprotection openlampregulation shortlampprotection cmphighprotection dynamiccontrastratiomode thermalshutdown 20pinsop applications lcdtv lcdmonitor description the fan7319 is a lcd backlight inverter drive ic th at controls nn pushpull topology or nn fullbridge topologyusingaproprietaryphaseshiftmethod. the fan7319 provides a lowcost solution and reduce s externalcomponentsbyintegratingfullwaverectif iersfor openlamp protection and regulation. the operating voltage range is wide, so an external regulator isn t necessarytosupplyvoltagetotheic. the fan7319 provides various protections, such as openlamp regulation, openlamp protection, shortl amp protection,cmphighprotection,andfbhighprotec tion, toincreasethesystemreliability.thefan7319pro vides burstdimmingfunctionandanalogdimming. the fan7319 is available in a 20lead small outline integratedcircuit(sioc)package. orderinginformation partnumber operatingtemperature package packingm ethod FAN7319M 25to+85c 20lead,soic,jedec ms013,.300inch,widebody rail FAN7319Mx 25to+85c tape&reel
?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 2 fan7319lcdbacklightinverterdriveic blockdiagram figure1.internalblockdiagram ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 3 fan7319lcdbacklightinverterdriveic pinconfiguration f :fairchildlogo p :assemblysitecode xy :year&weeklycode tt :dierun code fan7319 :devicename 1 2 3 4 5 6 7 8 20 19 18 17 16 15 14 13 gnd cmp volp outb outc olp ovpr olr bdim rt adim ref rt1 9 10 12 11 timer outd mode ena sense vin outa figure2.pindiagramwithtopmark ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 4 fan7319lcdbacklightinverterdriveic pindefinitions pin# name description 1 volp thispinisforreferencevoltageofopenla mpprotectionlevelinstrikingmode. 2 ref thispinis5vreferenceoutput. 3 bdim thispinistheinputforburstdimming.inputtype ispwmpulsesignal,notdcvoltage. dimmingpolarityispositive. 4 adim thispinisforpositiveanalogdimming. 5 cmp erroramplifieroutput.typically,acompensationc apacitorisconnectedtothispinfromthe ground. 6 timer thispinisforprotectiondelaysetting.typically ,acapacitorisconnectedtothispinfrom ground.ovp/olp/high_cmp/slpprotectiontimeisset bythiscapacitorvalue. 7 rt thispinisforprogrammingthenormalswitchingfr equency.typically,aresistoris connectedtothispinfromground. 8 rt1 thispinisforprogrammingthestrikingswitching frequency.instrikingmode,thispinis connectedtoground.typically,aresistorisconne ctedtothispinfromthertpin. 9 sense thispinisforsensingzerovoltageswitching(zvs )timing.ifvoltagecross0v,ctvoltage isreset;andoperatingfrequencyischangedbyzvs timing.ifthispinisnotused,itmustbe connectedtoref. 10 gnd thispinistheground. 11 outd thispinislowernmosgatedriveoutput2. (pushpull:disabled) 12 outc thispinisuppernmosgatedriveoutput2. (pushpull:disabled) 13 outb thispinislowernmosgatedriveoutput1. (pushpull:nmosgatedriveoutput2) 14 outa thispinisuppernmosgatedriveoutput1. (pushpull:nmosgatedriveoutput1) 15 vin thispinisthesupplyvoltageoftheic. 16 olr thispinisforopenlampregulation.itisconnect edtothefullwaverectifierinternally.iftwo feedbacksareavailable,sumoffeedbackisinputte dtothispin.whenolrinputisbetween 2vand3v,theerroramplifieroutputcurrentisli mitedto3a.whenolrinputreaches3v, theerroramplifieroutputcurrentis0aanditsou tputvoltagemaintainsconstant.olrinput isinputtedtothenegativeofanothererroramplif ierforfeedbackcontroloflampvoltage. whenolrinputismorethan3.3v,anothererroramp lifierforolrisoperatingandlamp voltageisregulated. 17 olp thispinisforopenlampprotectionandfeedbackc ontroloflampcurrents.itisconnectedto thefullwaverectifierinternally.iftwofeedback sareavailable,sumofrectifiedfeedbackis inputtedtothispin.instrikingmode,ifolpinpu tislessthan1v;orinnormalmode,ifolp inputislessthan0.5v;theicshutsdowntoprote ctthesysteminopenlampcondition. shutdowntimeisprogrammedbythecapacitorvalue connectedtothetimerpin.olp inputisinputtedtothenegativeoftheerrorampl ifierforfeedbackcontroloflampcurrent. 18 mode thispinisfortopologyselection.ifthispinis connectedtoref,itispushpulltopology; outc&outdisdisabled.ifthispinisconnectedt ognd,itisfullbridgetopology. 19 ovpr thispinisforreferencevoltageofoverv oltageprotection(ovp). 20 ena thispinisforturningon/offtheic.ifenablevo ltageislowerthan2.1v,dcrmodeis disabled.ifenablevoltageishigherthan2.5v,dc rmodeisactivatedandolpisdisabled. ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 5 fan7319lcdbacklightinverterdriveic absolutemaximumratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be operableabovetherecommendedoperatingconditions andstressingthepartstotheselevelsisnotrec ommended.in addition,extendedexposuretostressesabovether ecommendedoperatingconditionsmayaffectdevicer eliability.the absolutemaximumratingsarestressratingsonly. symbol parameter min. max. unit v in icsupplyvoltage 10 28 v t a operatingtemperaturerange 25 +85 c t j operatingjunctiontemperature +150 c t stg storagetemperaturerange 65 +150 c ja thermalresistancejunctiontoair (1,2) 90 c/w p d powerdissipation 1.4 w notes: 1. thermalresistancetestboard.size:76.2mmx11 4.3mmx1.6mm(1s0p);jedecstandard:jesd512,jes d513. 2. assumenoambientairflow. pinbreakdownvoltage pin# name value unit pin# name value unit 1 rt 7 v 11 olr 7 v 2 ena 7 12 olp 7 3 cmp 7 13 gnd 7 4 adim 7 14 outa 28 5 ref 7 15 outb 28 6 mode 7 16 outc 28 7 bdim 7 17 outd 28 8 ovpr 7 18 vin 28 9 volr 7 19 timer 7 10 sense 7 20 rt1 7 ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 6 fan7319lcdbacklightinverterdriveic electricalcharacteristics for typical values, t a = 25c, v in = 15v, and 25c t a 85c, unless otherwise specified. specifications t o t a = 25c~85careguaranteedbydesignbasedonfina lcharacterizationresults. symbol parameter testconditions min. typ. max. unit undervoltagelockoutsection(uvlo) v th startthresholdvoltage 8.0 8.7 9.4 v v thhys startthresholdvoltagehysteresis 0.4 0.8 1.2 v i st startupcurrent v in =9.0v 40 100 120 a i op operatingsupplycurrent v in =15v, notswitching 0.5 2.0 3.5 ma on/offsection v on onstateinputvoltage 1.4 5.0 v v off offstateinputvoltage 0.7 v i sb standbycurrent v in =15v, ena=low 100 160 200 a r ena pulldownresistor 120 200 280 k referencesection(recommend1fx7rcapacitor) v 5 5vregulationvoltage 0 i 5 3ma 4.9 5.0 5.1 v v 5line 5vlineregulation 10 v in 24v 4 50 mv v 5load 5vloadregulation i 5 =3ma 4 50 mv oscillatorsection(main) f osc oscillationfrequency t a =25c, rt=50k 48.50 50.0 51.50 khz rt=50k 48.25 50.00 51.75 f str oscillatorfrequencyinstrikingmode t a =25c,rt= 50k,rt1=100k 68.90 71.45 74.00 khz rt=50k, rt1=100k 68.60 71.45 74.30 v cth cthighvoltage 2 v v ctl ctlowvoltage 0.45 v burstdimmingsection v bdim(on) burstdimmingonvoltage 2 5 v v bdim(off) burstdimmingoffvoltage 0 0.8 v continued on the following page ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 7 fan7319lcdbacklightinverterdriveic electricalcharacteristics (continued) for typical values, t a = 25c, v in = 15v, and 25c t a 85c, unless otherwise specified. specifications t o t a = 25c~85careguaranteedbydesignbasedonfina lcharacterizationresults. symbol parameter testconditions min. typ. max. uni t erroramplifiersection a v openloopgain (3) 24 db g m erroramplifiertransconductance 20 40 60 mho l sin outputsinkcurrent olp=2.25v 30 50 70 a l sur1 outputsourcecurrent1 olp=0v 20 40 60 a l sur2 outputsourcecurrent2 cmp=2.7v 1.4 2.0 2.6 a i bsin burstcmpsinkcurrent 38 52 66 a i olpi olpinputcurrent olp=2v 1 0 1 a i olpo olpoutputcurrent olp=2v 10 20 30 a v olpr olpinputvoltagerange (3) 4 4 v v alim adimlimitvoltage adim=2v 1.5 v v off1 erroramplifieroffset t a =25c,v adim =1v 0.97 1.00 1.03 v 25c t a 85c, v adim =1v 0.96 1.00 1.04 v openlampregulationsection i olr1 erroramplifiersourcecurrentfor openlampregulation striking,olr= v olr1 +0.05 2.5 3.0 3.5 a i olr2 olr=3.1v 1 0 1 a v olr1 openlampregulationvoltage1 striking 1.85 2.00 2.15 v v olr2 openlampregulationvoltage2 striking 2.8 3.0 3. 2 v v olr3 openlampregulationvoltage3 3.05 3.25 3.45 v i olrsi olrerroramplifiersinkcurrent normal,olr=3.5 v 15.0 42.5 70.0 a i olri olrinputcurrent olr=2.5v 1 0 1 a i olro olroutputcurrent olr=2.5v 15 25 35 a v olrr olrinputvoltagerange (3) 4 4 v continued on the following page ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 8 fan7319lcdbacklightinverterdriveic electricalcharacteristics (continued) for typical values, t a = 25c, v in = 15v, and 25c t a 85c, unless otherwise specified. specifications t o t a = 25c~85careguaranteedbydesignbasedonfina lcharacterizationresults. symbol parameter testconditions min. typ. max. uni t protectionsection v olp0 openlampprotectionvoltage0 openlampinstriki ng v olp v v olp1 openlampprotectionvoltage1 normal,vena=2v 0 .4 0.5 0.6 v v cmpr cmphighprotectionvoltage 2.85 3.00 3.15 v v slp shortlampprotectionvoltage normal,vena=2v 0. 4 0.5 0.6 v v tmr1 timerthresholdvoltage1 striking:repeat4time s 2.9 3.0 3.1 v v tmr2 timerthresholdvoltage2 normal 0.9 1.0 1.1 v i tmr1 timercurrent1 openlamp 1.6 2.0 2.4 a i tmr2 timercurrent2 shortlamp 40 50 60 a tsd thermalshutdown 150 c v ovp overvoltageprotectionvoltage v ovpr v v dcr ena2.3v olp disable/enable change voltage 2.1 2.3 2.5 v outputsection v ndhv nmosgatehighvoltage v in =12v v in 0.5 v in v in +0.5 v v ndlv nmosgatelowvoltage (3) v in =12v 0.3 0 0.3 v v nuv nmosgatevoltagewithuvlo activated v in =4.5v 0 0.3 v i ndsur nmosgatedrivesourcecurrent v in =12v 200 ma i ndsin nmosgatedrivesinkcurrent v in =12v 300 ma maximum/minimumoverlap minimumoverlapbetweendiagonal switches f osc =100khz, see figure 14 0 % maximumoverlapbetweendiagonal switches f osc =100khz see figure 14 86 90 % deadtime t d_ab ndr_a/ndr_b see figure 34 450 550 650 ns t d_cd ndr_c/ndr_d see figure 35 450 550 650 ns note: 3. theseparameters,althoughguaranteed,arenot1 00%testedinproduction. ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 9 fan7319lcdbacklightinverterdriveic typicalperformancecharacteristics figure3. startthresholdvoltagevs.temperature figure4. startthresholdvoltagehysteresis vs.temperature figure5. startupcurrentvs.temperature figure6. operatingcurrentvs.temperature figure7. standbycurrentvs.temperature figure8. 5vregulationvoltagevs.temperature 8.7 8.71 8.72 8.73 8.74 8.75 8.76 8.77 8.78 8.79 8.8 - 25 - 15 0 25 50 70 85 v th [v] temp [ ] 0.5 0.6 0.7 0.8 0.9 1 - 25 - 15 0 25 50 70 85 v thhys [v] temp [ ] 40 55 70 85 100 115 130 145 - 25 - 15 0 25 50 70 85 i st [a] temp [ ] 0 1 2 3 4 - 25 - 15 0 25 50 70 85 i op1 [ma] temp [ ] 0 50 100 150 200 250 300 - 25 - 15 0 25 50 70 85 i sb [a] temp [ ] 4.8 4.9 5 5.1 5.2 - 25 - 15 0 25 50 70 85 v 5 [v] temp [ ] ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 10 fan7319lcdbacklightinverterdriveic typicalperformancecharacteristics (continued) figure9. oscillationfrequencyvs.temperature figure10.oscillationfrequencyinstriking vs.temperature figure11.erroramplifieroffset1vs.temperature figure12.erroramplifieroffset05vs.temperatur e figure13.erroramplifiersourcecurrent1 vs.temperature figure14.erroramplifiersourcecurrent2 vs.temperature 90 92 94 96 98 - 25 - 15 0 25 50 70 85 f osc [khz] temp [ ] 130 132 134 136 138 140 - 25 - 15 0 25 50 70 85 f str [khz] temp [ ] 0.9 0.95 1 1.05 1.1 - 25 - 15 0 25 50 70 85 v off1 [v] temp [ ] 0.4 0.45 0.5 0.55 0.6 - 25 - 15 0 25 50 70 85 v off05 [v] temp [ ] -55 -50 -45 -40 -35 -30 -25 -20 - 25 - 15 0 25 50 70 85 i sur1 [a] temp [ ] -3 -2.5 -2 -1.5 -1 - 25 - 15 0 25 50 70 85 i sur2 [a] temp [ ] ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 11 fan7319lcdbacklightinverterdriveic typicalperformancecharacteristics (continued) figure15.erroramplifiersourcecurrentforolr vs.temperature figure16.erroramplifiersinkcurrent vs.temperature figure17.burstcmpsinkcurrentvs.temperature figure18.olrerroramplifiersinkcurrent vs.temperature figure19.openlampprotectionvoltage1 vs.temperature figure20.highcmpprotectionvoltage vs.temperature -5 -4.5 -4 -3.5 -3 -2.5 -2 - 25 - 15 0 25 50 70 85 i olr1 [a] temp [ ] 20 30 40 50 60 70 80 90 - 25 - 15 0 25 50 70 85 i sin [a] temp [ ] 45 50 55 60 65 - 25 - 15 0 25 50 70 85 i bsin [a] temp [ ] 20 30 40 50 60 - 25 - 15 0 25 50 70 85 i ors [a] temp [ ] 0.4 0.45 0.5 0.55 0.6 - 25 - 15 0 25 50 70 85 v olp1 [v] temp [ ] 2.8 2.9 3 3.1 3.2 - 25 - 15 0 25 50 70 85 v cmpr [v] temp [ ] ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 12 fan7319lcdbacklightinverterdriveic typicalperformancecharacteristics (continued) figure21.shortlampprotectionvoltage vs.temperature figure22.openlampregulationvoltage1 vs.temperature figure23.openlampregulationvoltage2 vs.temperature figure24.openlampregulationvoltage3 vs.temperature figure25.timerthresholdvoltage1 vs.temperature figure26.timerthresholdvoltage2 vs.temperature 0.2 0.3 0.4 0.5 0.6 0.7 - 25 - 15 0 25 50 70 85 v slp [v] temp [ ] 1.7 1.8 1.9 2 2.1 2.2 2.3 - 25 - 15 0 25 50 70 85 v olr 1 [v] temp [ ] 2.9 2.95 3 3.05 3.1 3.15 3.2 - 25 - 15 0 25 50 70 85 v olr 2 [v] temp [ ] 3.15 3.2 3.25 3.3 3.35 - 25 - 15 0 25 50 70 85 v olr3 [v] temp [ ] 2.7 2.8 2.9 3 3.1 3.2 3.3 - 25 - 15 0 25 50 70 85 v tmr1 [v] temp [ ] 0.9 0.95 1 1.05 1.1 - 25 - 15 0 25 50 70 85 v tmr2 [v] temp [ ] ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 13 fan7319lcdbacklightinverterdriveic typicalperformancecharacteristics (continued) figure27.timercurrent1vs.temperature figure28.timercurrent2vs.temperature 1.9 1.95 2 2.05 2.1 - 25 - 15 0 25 50 70 85 i tmr1 [a] temp [ ] 40 45 50 55 60 65 70 - 25 - 15 0 25 50 70 85 i tmr2 [a] temp [ ] ?2010fairchildsemiconductorcorporation fan7319?1.0.1 functionaldescription uvlo the undervoltage lockout (uvlo) circuit guarantees stableoperationoftheiccontrolcircuitby startingitasafunctionofv in .theuvlocircuitturnson the control circuit when v in exceeds 9v. when v lowerthan8v,theicstartupcurrentislessthan 1 ena applying voltage higher than 1.4 v to the ena pin enablestheic.ifv ena ishigherthan2.5v, dcrmode.ifv ena islowerthan2.1v,ic mode. applying voltage lower than 0.7v to the ena pin disablestheic. mainoscillator the internal timing capacitors (cts) are charged by the reference current source, which is formed by the ti ming resistor(rt).thetimingresistorsvoltageisreg ulatedat 2 v.thesawtoothwaveformchargesupto2v.oncethi s voltage is reached, the capacitors begin d down to 0.5 v. next, the timing capacitorsstartcharging again and a new switching cycle begins. the main frequency can be programmed by adjusting the rt values.themainfrequencycanbecalculatedas [ ] khz ] rt[k 0.000189 f delay osc t 500 + ? = wheret delay is: 20 ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 16 fan7319lcdbacklightinverterdriveic synchronousdrives fan7319 can be operated as zero current switching (zcs) or zero voltage switching (zvs) mode using th e sense pin. internal ct voltage is forced to dischar ge when the sense pin voltage crosses the zero point. if ac signal is applied to the sense pin, operating frequency is synchronous with a frequency of input signal. figure 36 shows the synchronous operation i n pushpulltopology. during striking mode, the operating frequency is se t to fixed frequency by a resistor, regardless of the se nse pinzerocrossingpoint. the sense pin zero crossing frequency is faster tha n set frequency. if zero crossing frequency is slower than set frequency, frequency is abnormal due to irregul ar dischargingofctvoltage. if sense zero crossing frequency is much faster tha n set frequency, ct discharging voltage could be lowe r than1.5v.inthiscase,ctdischargingvoltageis heldto 1.5vtopreventsynchronousfrequencybeingtoohig h. sync outa outb cmp ct t 2v 0.5v sense figure36.synchronousoperationinpushpullmode protections the fan7319 provides the following latchmode protections: openlamp regulation (olr), openlamp protection (olp), shortlamp protection (slp), cmp high protection, and thermal shutdown (tsd). the latchisresetwhenv in fallstotheuvlovoltageorena ispulleddowntognd. protectiontimingcanbecalculatedbasedonfigure 37. figure37.timerchargingcircuit assumethattimercapacitoris1f. striking time is onetime charging from zero to 3v and fourtimes charging from 0.3v to 3v with 2a curren t source.thestrikingtimeiscalculatedasfollows: s 9.6 f 2 v 7.2 f 1 4 f 2 v 3 f 1 i v c t 1 sur str strike = ? ? + ? = = (6) theovpandslpdelaytimesarecalculatedas: ms 20 f 50 v 1 f 1 i v c t 2 sur nor slp _ ovp = ? = = (7) the cmphigh protection and olp delay times are calculatedas: ms 500 f 2 v 1 f 1 i v c t 1 sur nor cmph _ olp = ? = = (8) openlampregulation when the maximum of the rectified olr input voltage s olr max v is more than 3v, the ic enters regulation mode and controls the cmp voltage. the ic limits the lam p voltagebydecreasingthecmpsourcecurrent.if olr max v is between 2v and 3v, the cmp source current decreases from 40a to 3a. then, if olr max v reaches 3v, cmp source current decreases to 0a, so cmp voltage remains constant and the lamp voltage also remains constant, as shown in figure 38. finally, i f olr max v ismorethan3.25v,theerroramplifierforolris operating and cmp sink current increases, so cmp voltage decreases and the lamp voltage maintains th e determinedvalue. atthesametime,while olr max v ismorethanovpr,the 50a current source starts charging timer capacitor in normal mode.when timer voltage reaches 1v, the ic entersshutdown,asshowninfigure40.thisprotec tion isdisabledinstrikingmodetoignitelampsreliab ly. ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 17 fan7319lcdbacklightinverterdriveic figure38.openlampregulationinstrikingmode figure39.openlampregulationinnormalmode olr 0 cmp timer ovpr 0 ovpr 0 z ? ? ? g ? ? ? ? \ w ? h g j ? ? ? ? ? ? g z ? ? ? ? ? ? ? 00 outa outb outc outd 1v figure40.overvoltageprotectioninnormalmode openlampprotection if the minimum of the rectified olp voltage olr min v is lessthanv olp duringinitialoperation,theicoperatesin strikingmodeonlyfor6.9s,asshowninfigure41. after ignition,if olr min v islessthan0.5vinnormalmode,the ic is shut down after a delay of 500ms, as shown in figure 42. in dcr mode (v ena >2.5v), if olr min v is less than 0.5v in normal mode; the ic operates normally withoutshutdown,asshowninfigure43. figure41.openlampprotectioninstrikingmode figure42.openlampprotectioninnormalmode figure43.openlampprotectionindcrmode ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 18 fan7319lcdbacklightinverterdriveic shortlampprotection if the minimum of the rectified olr voltages ( min olr v ) is lessthan0.5vinnormalmode,theicisshutdown after a delay of 20ms, as shown in figure 44. in dcr mode (v ena >2.5v), if min olr v is less than 0.5v in normal mode; theicoperatesnormallywithoutshutdown,asshown in figure45.thisprotectionisdisabledinstriking modeto ignitelampsreliably. figure44.shortlampprotectioninnormalmode figure45.shortlampprotectionindcrmode cmphighprotection if cmp is 2.5v in normal mode, olp peak voltage is higherthanadimvoltageandcmpvoltageisholding at 2.5v.ifcmpis2.5vinnormalmode,olppeakvolta ge islowerthanadimvoltageandcmpischargedby1 a current source. if cmp is higher than3v, the ic is shut downafteradelayof500ms,asshowninfigure46. this protection is disabled in striking mode to ignite l amps reliably. to remove cmphigh protection, connect a 1m resistor to cmp capacitor in parallel. unless 1a sourcing current flows into the resistor, cmp volta ge cannotbecharged. figure46.cmphighprotectioninnormalmode thermalshutdown the ic provides a function to detect abnormal over temperature. if the ic temperature exceeds approximately150 c,thethermalshutdowntriggers. ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 19 fan7319lcdbacklightinverterdriveic table1.protectionconditiontable mode category item condition operation dcrmode vena>2.5v fault condition changingto normal frequency condition striking regulation olr v olr(max) >2v cmpsource=3a v timer >3v, 5times repeat v olp(max) >v olp & v olr(max) ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 20 fan7319lcdbacklightinverterdriveic typicalfullbridgeapplicationcircuit(lcdbackli ghtinverter) application inputvoltagerange numberoflamps lcdtv(lipstype) 13 10% ccfl/eeflip figure47.typicalfullbridgeapplicationcircuit r107 22r r108 22r r109 22r r39 1k r40 open vin vin r205 12k r56 22r r35 15k c23 2.2u r404 1k r31 51k c27 100n d101 bav70 sot23 c25 100n t 1 d201 bav70 sot23 f1 fuse c52 100uf 450v r58 33k c102 1n r30 82k d10 bav70 sot23 r302 1.8r c51 100uf 450v r59 open r12 10k fan7319 ic2 fan7319 20soic volp ref bdim adim cmp timer rt rt1 outb outa vin olr olp mode ovpr ena sense gnd outc outd m2 fdpf7n50f to220f r19 15k c401 open r303 12k r21 open 1w q301 q2n2222a sot23 r20 33 1w c11 22p zd301 open sod123 r55 47k c5 680nf 600v c29 1u d401 bav70 sot23 c6 27pf/6kv q201 q2n2222a sot23 c24 2.2u cn3 cn_ccfl 1 1 2 2 c8 15n q401 q2n2222a sot23 cn2 12505wr5 1 2 3 4 5 r305 12k r22 30k r401 68r r204 1k r105 12k r34 30k r57 100k c28 1n cn4 cn_ccfl 1 1 2 2 zd101 open sod123 c202 1n r101 68r t 2 r301 68r r14 10k t 3 r203 12k r202 1.8r r53 10k r16 30k r28 open 1w m1 fdpf7n50f to220f c302 1n c402 1n r104 1k r304 1k q101 q2n2222a sot23 r33 open m3 fdpf7n50f to220f r102 1.8r zd201 open sod123 zd401 open sod123 r405 12k c15 4.7n c26 1n c1 47uf 25v r403 12k r27 33 1w r103 12k r60 0r c3 27pf/6kv r201 68r c201 open c101 open m4 fdpf7n50f to220f r44 10k d8 bav70 sot23 r52 4.7r c7 15n\ r15 10k d301 bav70 sot23 r38 10k r54 68k r402 1.8r c301 open pfc_out(380vdc) outd outc olr olp outa sense outd outb outb outc sense outa olr olp 0 0 0 0 ref 0 0 0 0 0 0 0 ref 0 ena adim(positive) bdim(externalonly) vin(10~24v) puls e trans form er k=0.98 l1=700uh/l2=400uh puls e trans form er c16 1n r106 22r ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 21 fan7319lcdbacklightinverterdriveic typicalhalfbridgeapplicationcircuit(lcdbackli ghtinverter) application inputvoltagerange numberoflamps lcdtv(lipstype) 13 10% ccfl/eeflip figure48.typicalhalfbridgeapplicationcircuit 0 fan7319 ic2 fan7319 20soic volp ref bdim adim cmp timer rt rt1 outb outa vin olr olp mode ovpr ena sense gnd outc outd vin vin d8 bav70 sot23 r15 10k r22 30k r20 33 1w r27 33 1w r301 68r c301 open r55 47k zd301 15v sod123 c6 25pf/6kv c5 680nf 600v c24 2.2u c15 10n c401 open c402 1n r58 33k c52 82uf 450v r304 1k f1 fuse r30 open c51 82uf 450v c29 1u c3 25pf/6kv r52 4.7r zd401 15v sod123 r59 0r d10 bav70 sot23 r28 open 1w c28 1n r303 12k r38 10k r19 15k r16 30k c1 47uf 25v q301 q2n2222a sot23 cn4 cn_ccfl 1 1 2 2 r14 10k c23 2.2u m3 fdpf7n50f to220f d401 bav70 sot23 r31 33k r403 12k cn2 12505wr5 1 2 3 4 5 r57 100k r12 10k r302 1.8r r44 10k r305 12k m4 fdpf7n50f to220f c302 1n r401 68r r56 22r r402 1.8r t 3 c25 100n c26 1n d301 bav70 sot23 c7 15n\ r60 open r21 open 1w r405 12k q401 q2n2222a sot23 c8 15n c27 100n r35 15k cn3 cn_ccfl 1 1 2 2 r404 1k r53 10k r54 68k t 2 pfc_out(380vdc) olp sense olr outb outa outa outb olp sense olr 0 0 0 r306 22r 0 0 0 ref 0 0 0 0 bdim(externalonly) vin(10~24v) 0 puls e trans form er ena adim (positive) c11 22p ref r307 22r r33 open c16 1n r34 30k ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 22 fan7319lcdbacklightinverterdriveic physicaldimensions figure49.20pin,smalloutlineintegratedcircuit (soic)package package drawings are provided as a service to custo mers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or dat e on the drawing and contact a fairchild semiconduc tor representative to verify or obtain the most recent revision. package specificat ions do not expand the terms of fairchilds worldwi de terms and conditions, specifically the warranty therein, which covers fai rchild products. always visit fairchild semiconductors online packa ging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ . 0.10 c c a seedetaila notes:unlessotherwisespecified a)thispackageconformstojedec ms013,variationac,issuee b)alldimensionsareinmillimeters. c)dimensionsdonotincludemold flashorburrs. e)landpatternstandard:soic127p1030x26520l pinone indicator 0.25 1 10 b c a m 20 11 b x45 8 0 seatingplane gageplane detaila scale:2:1 seatingplane landpatternrecommendation f)drawingfilename:mktm20brev3 0.65 1.27 2.25 9.50 13.00 12.60 11.43 7.60 7.40 10.65 10.00 0.51 0.35 1.27 2.65max 0.30 0.10 0.33 0.20 0.75 0.25 (r0.10) (r0.10) 1.27 0.40 (1.40) 0.25 d)conformstoasmey14.5m1994 ?2010fairchildsemiconductorcorporation www.fairchildsemi.com fan7319?1.0.1 23 fan7319lcdbacklightinverterdriveic 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