Daashee, V2.0, 11 April 2000 F1 TDA 16822 OffLine Curren Mode Conroller wih CoolMOS on board Power Conversion Never sop hinking.
Revision Hisory: 20000411 Daashee Previous Version: Page Subjecs (major changes since las revision) For quesions on echnology, delivery and prices please conac he Infineon Technologies Offices in Germany or he Infineon Technologies Companies and Represenaives worldwide: see our webpage a hp://www.infineon.com CoolMOS, are rademarks of Infineon Technologies AG. Ediion 20000411 Published by Infineon Technologies AG, S.MarinSrasse 53, D81541 München Infineon Technologies AG 1999. All Righs Reserved. Aenion please! The informaion herein is given o describe cerain componens and shall no be considered as warraned characerisics. Terms of delivery and righs o echnical change reserved. We hereby disclaim any and all warranies, including bu no limied o warranies of noninfringemen, regarding circuis, descripions and chars saed herein. Infineon Technologies is an approved CECC manufacurer. Informaion For furher informaion on echnology, delivery erms and condiions and prices please conac your neares Infineon Technologies Office in Germany or our Infineon Technologies Represenaives worldwide (see address lis). Warnings Due o echnical requiremens componens may conain dangerous subsances. For informaion on he ypes in quesion please conac your neares Infineon Technologies Office. Infineon Technologies Componens may only be used in lifesuppor devices or sysems wih he express wrien approval of Infineon Technologies, if a failure of such componens can reasonably be expeced o cause he failure of ha lifesuppor device or sysem, or o affec he safey or effeciveness of ha device or sysem. Life suppor devices or sysems are inended o be implaned in he human body, or o suppor and/or mainain and susain and/or proec human life. If hey fail, i is reasonable o assume ha he healh of he user or oher persons may be endangered.
OffLine SMPS Curren Mode Conroller wih CoolMOS on board Feaures PWM conroller + CoolMOS wihin one compac package 650V (1) avalanche rugged CoolMOS Typical R DSon = 3 Ohm Sandard DIP8 package up o 20W Only few exernal componens required Low sar up curren Improved curren mode conrol for low load condiions Inpu Undervolage Lockou Max duy cycle 72% lached hermal shu down when T j =140 C of PWM conroller Overload and open loop proecion by hiccup mode Overvolage proecion during hiccup mode Overall olerance of curren limiing < ±5% adjusable peak curren limiaion via exernal resisor curren overshoo minimizaion dependen on di/d PDIP86 Descripion The TDA 16822 is a curren mode pulse widh modulaor wih buil in CoolMOS ransisor. I fulfils he requiremen of minimum exernal conrol circuiry for a flyback applicaion. Curren mode conrol means ha he curren hrough he CoolMOS ransisor is compared wih a reference signal derived from he oupu volage of he flyback applicaion. The resul of ha comparision deermines he onime of he CoolMOS ransisor. The accuracy of he swiching frequency is highly sophisicaed due o emperaure compensaion. Furhermore overload and open loop proecion is implemened by sensing he feedback line. This means in case of overload or open loop he IC is working in proecion mode. Typical Applicaion + 85... 270 VAC R Sarup Snubber Converer DC Oupu C VCC VCC Drain Feedback PWMConroller Power Managemen CoolMOS TM C Sof Sar SofS SofSar Conrol PWM Conroller Curren Mode FB Proecion Uni Feedback TDA 16822 GND Isense R Sense Type Ordering Code Package TDA 16822 Q67000A9449 PDIP86 Version 2.0 3 11 April 2000
1 Pin Configuraion and Ouline Dimension (op view) PDIP86 SofS 1 8 GND FB Isense Drain 2 3 4 TDA 16822 7 6 5 VCC N.C. Drain Figure 1 Pin Symbol Funcion 1 SofS SofSar 2 FB Feedback 3 Isense Conroller Curren Sense Inpu, CoolMOS Source Oupu 4 Drain 650V (1) CoolMOS Drain 5 Drain 650V (1) CoolMOS Drain 6 N.C. No conneced 7 VCC Conroller Supply Volage 8 GND Conroller Ground (1): a Tj = 110 C Version 2.0 4 11 April 2000
2 Elecrical Characerisics 2.1 Absolue Maximum Raings Noe: Absolue maximum raings are defined as raings, which when being exceeded may lead o desrucion of he inegraed circui. For he same reason make sure, ha any capacior ha will be conneced o pin 7 (VCC) is discharged before assembling he applicaion circui. Parameer Symbol Limi Values Uni Remarks min. max. V CC supply volage V CC 0.3 17 V Drain Source Volage V DS 650 V T j =110 C Coninous Drain Curren I D 1.5 A Avalanche energy, repeiive AR limied by T jmax 1) I AR 2.5 A Avalanche curren, repeiive AR E AR 0.1 mj I AR =2.5A limied by T jmax V DD =50V FB Volage V FB 0.3 6.5 V SofS Volage V SofS 0.3 6.5 V ISense I Sense 0.3 3 V Juncion emperaure T j 40 150 C Sorage emperaure T S 50 150 C Thermal resisance R hja 90 K/W PDIP86 1) Repeiive avalanche causes addiional power losses ha can be calculaed as P AV = E AR *f 2.2 Operaing Range Noe: Wihin he operaing range he IC operaes as described in he funcional descripion. Parameer Symbol Limi Values Uni Remarks min. max. V CC supply volage V CC V CCon 17 V Juncion emperaure T J 25 130 C Conroller Ambien emperaure T A 25 100 C Version 2.0 5 11 April 2000
2.3 Characerisics Supply Secion Noe: The elecrical characerisics involve he spread of values guaraneed wihin he specified supply volage and ambien emperaure range T A from 25 C o 100 C.Typical values represen he median values, which are relaed o 25 C. If no oherwise saed, a supply volage of V CC = 15 V is assumed. Parameer Symbol Limi Values Uni Tes Condiion Sar up curren I VCC1 85 125 ua V CC < 8.5V Supply curren wih inaciv CoolMOS Supply curren wih aciv CoolMOS VCC TurnOn Threshold VCC TurnOff Threshold VCC TurnOn/Off Hyseresis I VCC2 5 7 ma V SofS = 0 I VCC3 6.5 8 ma I FB = 0 V CCon V CCoff V CCHY 13.5 8.5 4 14 9 5 14.5 9.5 6 V V V Inernal Volage Reference Parameer Symbol Limi Values Uni Tes Condiion Trimmed reference volage V REF 6.35 6.55 6.75 V Measured a pin FB Temperaure coefficien V REF V REF 0.2 mv/ C Feedback & SofSar Parameer Symbol Limi Values Uni Tes Condiion V FB operaing range min level V FB1 0.8 V Feedback resisance R FB 3.0 3.7 4.9 kohm Temperaure coefficien R FB TK R FB 600 ppm/ C SofSar resisance R SofSar 42 50 62 kohm Temperaure coefficien TK R SofSar 600 ppm/ C R SofSar Version 2.0 6 11 April 2000
Oscillaor Parameer Symbol Limi Values Uni Tes Condiion Frequency f swich 93 100 107 khz Temperaure Coefficien TK f swich 1000 ppm/ C Proecion Uni Parameer Symbol Limi Values Uni Tes Condiion Over load & open loop deecion limi Acivaion limi of overload & open loop deecion Deacivaion limi of overvolage deecion V FB2 4.5 4.8 5.1 V V SofSar > 5.3V V SofSar1 5.0 5.3 5.6 V V FB > 4.8V V SofSar2 3.8 4 4.2 V V FB < 4.8V V CC > 16V Overvolage deecion limi V VCC 15.3 16 16.7 V V SofSar < 4V V FB > 4.8V Thermal Shudown T jsd 130 140 150 C guaraned by design Curren Limiing (Curren Sense CS) Parameer Symbol Limi Values Uni Tes Condiion CS hreshold (incl. propagaion delay ime) (see Figure 4) CoolMOS Secion V csh 0.97 1.02 1.07 V R Sense =2Ohm di/d<0.5a/us Parameer Symbol Limi Values Uni Tes Condiion Drain source breakdown volage Drain source avalanche breakdown volage Drain source onresisance V (BR)DSS 600 650 V V T j =25 C T j =110 C V (BR)DS 700 V T j =25 C R DSon 3 3.8 7 Ohm Ohm T j =25 C T j =120 C Zero gae volage drain curren I DSS 0.1 ua U GS =0V Oupu Capaciance C OSS 10 pf U DS 0=V o 480V Rise ime rise 40 ns Fall ime fall 20 ns Version 2.0 7 11 April 2000
PWM Secion Parameer Symbol Limi Values Uni Tes Condiion Max duy cycle D max 0.67 0.72 0.77 Min duy cycle D min 0 V FB = 0V OP gain A v 3.45 3.65 3.95 OP gain bandwidh B w 4 MHz OP phase margin Φ w 90 Version 2.0 8 11 April 2000
Oupu Capaciance Coss versus VDS Overcurren Shudown, Ipk=0.5A normaive drain curren Coss / pf 100 80 60 40 20 0 40 50 60 70 80 90 10 0 VDS / V Vcsh / V 1,6 1,5 1,4 1,3 1,2 1,1 1 0,9 0 0,2 0,4 0,6 0,8 1 1,2 1,4 1,6 1,8 2 di/d / A/us Figure 2 Figure 4 Sw iching frequency versus emperaure f / khz 110 108 106 104 102 100 98 96 94 92 90 25 0 25 50 75 100 125 150 Temp / C Figure 3 Version 2.0 9 11 April 2000
85... 270 VAC SofS C SofSar FB VCC 6.5V R SofSar T1 6.5V R FB TDA 16822 R Sarup 10V C4 16V C1 4V C2 5.3V C5 4.8V C3 Proecion Uni GND C VCC G1 G2 G3 Thermal Shudown T j >140 C Undervolage Lockou 14V Power Managemen Inernal Bias 9V PowerDown Rese PowerUp Rese Volage Reference 6.5V 5.3V 4.8V 4.0V Sof Sar SofSar Comparaor Delay 5us S Q R Q ErrorLach PWM Comparaor 0.8V PWM OP x3.65 Curren Mode Oscillaor 0.7 Duy Cycle max 100kHz Clock PWMLach S Q R Q G4 CurrenLimi Comparaor V csh PropagaionDelay Compensaion Curren Limiing Snubber Drain Driver Isense R Sense Opocoupler + Converer DC Oupu 3 Represenaive Blockdiagramm Figure 5 Version 2.0 10 11 April 2000
4 Operaion Descripion Power Managemen The undervolage lockou moniors he exernal supply volage V CC. When V CC exceeds he onhreshold V CCon =14V, he inernal bias circui and he volage reference are swiched on. Addiionally he errorlach in he proecion uni is rese. The inernal bandgap generaes a reference volage V REF =6.55V o supply he inernal circuis. When V CC falls below he offhreshold V CCoff =9V he circui is swiched off. Then he power down rese discharges he sofsar capacior C SofSar a pin SofS by swiching on T 1. During sar up he curren consumpion is only abou 100uA. Improved Curren Mode PWMOP The inpu of he PWMOP is applied o he exernal sense resisor R Sense conneced o pin ISense. R Sense allows an individual adjusmen of maximum CoolMOS source curren wih very low olerance of maximum curren hreshold. R Sense convers he source curren of he CoolMOS ino a sense volage. The sense volage is amplified wih a gain of 3.65. Then he amplified signal is superimposed on a virual ramp of 0.8V. Under low load condiions he source curren of he CoolMOS is insufficien o buil a volage ramp for he PWMComparaor. To guaraned a proper operaion a low load he virual ramp is he reference signal for he PWMComparaor. The oupu of he PWMOP is conneced o he posiive inpus of he PWMComparaor and he SofSarComparaor. PWMComparaor The PWMComparaor compares he sensed curren signal of he CoolMOS wih he feedback signal V FB. V FB is creaed by an exernal opocoupler or exernal ransisor in combinaion wih he inernal pullup resisor R FB and provides he informaion of he feedback circuiry. When he amplified curren signal of he CoolMOS exceeds he signal V FB he PWM Comparaor swiches off he CoolMOS. SofSar The SofSar is realized by he inernal SofSar Comparaor and pullup resisor R SofSar. The Sof SarComparaor compares he volage a pin SofS a he negaive inpu wih he rampsignal of he PWMOP a he posiive inpu. When he SofSar volage V Sof Sar is less han he Feedback volage V FB he Sof SarComparaor limis he pulse widh by reseing he driver. The SofSar also conrols he saring phase of he hiccup mode by he Comparaors C2 and C5 in case of overload or open loop. The SofSar volage is generaed by an exernal capacior C SofSar a pin SofS and he inernal pullup resisor R SofSar by charging he exernal capacior C SofSar. Curren Limiing There is a cycle by cycle curren limiing realised wih he CurrenLimiing Comparaor. The CoolMOS source curren is sensed via an exernal sense resisor R Sense. When he volage V Sense a R Sense exceeds he inernal hreshold volage V csh he CurrenLimi Comparaor immediaely urns off he gae drive. Propagaion Delay Compensaion Concerning circui delay here is an overshoo of he peak curren I pk which depends on he raio of di/d of he peak curren. A propagaion delay compensaion is inegraed o bound he olerance of he curren limiing a +/5% plus he olerances of R Sense. This means he propagaion delay ime beween exceeding he curren sense hreshold V csh and CoolMOS swich off is compensaed wihin a range of di 0 d 0.5 A / µ s E.g. I pk =0.5A a f swich =100kHz. Wihou propagaion delay compensaion he curren sense hreshold is se o V csh =1V. A curren ramp of di/d=0.4a/us and a propagaion delay ime of cshdelay =180ns leads o an I pk overshoo of 12%. Wih he propagaion delay compensaion he overshoo is only abou 2%. A curren ramp of di/d=0.1a/us leads o an overshoo of 3% in boh cases, wih and wihou compensaion. For furher informaion see Figure 4 on page 8. Oscillaor The oscillaor generaes a frequency f swich = 100kHz. A resisor, a capacior and a curren source which deermine he frequency are inegraed. The charging and discharging curren of he implemened oscillaor capacior are inernally rimmed, in order o achieve a very high accuracy swiching frequency. The raio of conrolled charge o discharge curren is adjused o reach a maximum PWM duy cycle D max =0.72. PWMLach The oscillaor clock oupu applies a se pulse o he PWMLach when iniiaing he CoolMOS conducion. Afer seing he PWMLach can be rese by he PWMOP, he SofSarComparaor, he CurrenLimiComparaor or he ErrorLach of he Proecion Uni. In case of reseing he driver is shu down direcly. Driver The driversage drives he gae of he CoolMOS and is opimized o minimize EMI and o provide high circui efficiency. This is done by reducing he swich on slope when reaching he CoolMOS hreshold. Thus he leading swich on spike is minimized. When CoolMOS is swiched off, he falling shape of he driver is slowed down when reaching 2V o preven an overshoo below ground. Furhermore he driver circui is designed o eliminae cross conducion of he oupu sage. Version 2.0 11 11 April 2000
Proecion Uni (Hiccup Mode) An overload and open loop proecion is inegraed wihin he Proecion Uni. These wo failure modes are lached by an ErrorLach. Addiional hermal shudown and undervolage proecion of V CC is lached by he ErrorLach. In case of hese failure modes he Error Lach is se afer a delay of 5us and CoolMOS is shu down. This delay prevens he ErrorLach from spikes during normal operaion mode. Overload & Open loop wih normal load The deecion of open loop or overload is provided by he Comparaor C3, C5 and he ANDgae G2. The deecion is acivaed by C5 when he volage a pin SofS exceeds 5.3V. Henceforh he comparaor C3 can se he ErrorLach in case of open loop or overload which leads he feedback volage V FB o exceed he hreshold of 4.8V. Afer laching VCC decreases ill 9V. A his ime he exernal SofSar capacior is discharged by he inernal ransisor T1 due o Power Down Rese. When he IC is inacive VCC increases ill 14V. Now he ErrorLach is rese by Power Up Rese and he exernal SofSar capacior C SofSar is charged by he inernal pullup resisor R SofSar. During he SofSar phase which ends when he volage a pin SofS exceeds 6V he deecion of overload and open loop by C3 and G2 is inacive. In his way he sar up phase is no deeced as an overload. Bu afer he SofSar phase he sar up phase mus be finished o force he volage a FB under he failure deecion hreshold of 4.8V. Figure 6 shows he hiccup mode in case of overload or open loop wih normal load. Open loop wih no load An addiional proecion by he comparaors C1, C2 and he ANDgae G1 is implemened. In case of open loop and no load condiion he burs phase during hiccup mode is finished early. In his siuaion he converer oupu volage increases and also V CC. Open loop & no load condiion Overload & Open loop/normal load FB 5us Delay FB 4.8V 5us Delay 4.8V Failure Deecion Failure Deecion SofS SofSar Phase SofS 5.3V SofSar Phase 5.3V 4V Overvolage Deecion Phase Driver T Burs T Hiccup Driver T Burs T Hiccup VCC Overvolage Deecion 16V 14V VCC 14V 9V 9V Figure 7 Figure 6 An overvolage proecion is provided by Comparaor C1 in he firs ime ill he SofSar volage exceeds he hreshold of he Comparaor C2 a 4V and he volage Version 2.0 12 11 April 2000
a FB is above 4.8V. This combinaion is o preven he normal operaion mode from overvolage proecion due o varying of VCC concerning he regulaion of he converer oupu. Figure 7 shows he hiccup mode for open loop and no load condiion. Undervolage Proecion There is an undervolage proecion of V CC realised by he Comparaor C4. In case V CC falls below 10V he Comparaor C4 immediaely urns off he gae drive by means of he ErrorLach. This is o provide only defined swiching of he CoolMOS. Thermal shudown Thermal shudown is lached by he ErrorLach when juncion emperaure of he pwm conroller is exceeding an inernal hreshold of 140 C. Version 2.0 13 11 April 2000
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