Infineon Power LED Driver TLD5045EJ 700mA High Inegraion - DC/DC Sep- Down Converer Daashee Rev. 1.0, 2011-05-27 Auomoive Power
Table of Conens Table of Conens Table of Conens................................................................ 2 1 Overview....................................................................... 3 2 Block Diagram................................................................... 4 3 Pin Configuraion................................................................ 5 3.1 Pin Assignmen................................................................... 5 3.2 Pin Definiions and Funcions........................................................ 5 4 General Produc Characerisics.................................................... 7 4.1 Absolue Maximum Raings......................................................... 7 4.2 Funcional Range................................................................. 8 4.3 Thermal Resisance............................................................... 8 5 Elecrical Characerisics.......................................................... 9 5.1 General Parameers............................................................... 9 5.2 Power Supply Monioring.......................................................... 10 6 Enable, Dimming Funcion and Thermal Proecion................................... 11 6.1 Descripion..................................................................... 11 6.2 Elecrical Characerisics Enable, Bias, Dimming Funcion and Thermal Proecion............. 12 6.2.1 PWM Dimming wih µc conneced o TLD5045 PWMI pin............................... 13 6.2.2 Inernal PWM dimming Funcion................................................... 14 6.3 Overemperaure Proecion of he Device............................................. 15 7 Open Load Diagnosis............................................................ 16 7.1 Descripion..................................................................... 16 7.2 Elecrical Characerisics: Open Load Diagnosis........................................ 16 7.3 Open Load Diagnosis in differen Applicaion Condiions.................................. 17 7.3.1 Ligh module applicaion wihou µc................................................ 17 7.4 Applicaion wih µc conneced o TLD5045 IC.......................................... 18 8 Applicaion Informaion.......................................................... 19 8.1 Oupu Peak Curren Adjusmen via R SET............................................. 19 8.2 Swiching Frequency Deerminaion.................................................. 20 8.3 TLD5045 in differen LED Applicaions................................................ 22 8.3.1 TLD5045 in a Body Conrol Module (BCM) wih µc Inerface............................. 22 8.3.2 Decenralized Ligh Module Applicaion - DLM (Inpu configuraion 1)...................... 23 8.3.3 Decenralized Ligh Module Applicaion - DLM (Inpu configuraion 2)...................... 24 8.3.4 Decenralized Ligh Module Applicaion - DLM (Inpu configuraion 3)...................... 25 9 Package Oulines............................................................... 26 10 Revision Hisory................................................................ 27 Daashee 2 Rev. 1.0, 2011-05-27
700mA High Inegraion - DC/DC Sep-Down Converer TLD5045EJ 1 Overview Consan Curren Generaion Wide Inpu Volage Range from 5V o 40V Peak Curren Regulaion Very low curren consumpion (<2uA) in Sleep Mode Inegraed power ransisor wih low sauraion volage Inegraed fas freewheeling diode Inegraed load curren sense resisor Inegraed saus pull down ransisor Overemperaure Proecion Swiching frequency (yp. 200kHz) adjusable via exernal RC nework PG-DSO-8 EP Exernal PWM Dimming Inpu Inegraed PWM Dimming Engine Analog Dimming (oupu curren adjusable via exernal low power resisor and possibiliy o connec PTC resisor for LED proecion during overemperaure condiions) Sable swiching frequency due o fix OFF-ime concep wih V REC (supply volage) feedforward Under- and Overvolage shudown wih hyseresis Small hermally enhanced exposed heaslug SMD package Auomoive AEC Qualified Green Produc (RoHS) Complian Descripion The TLD5045 is a highly inegraed smar LED buck conroller wih buil in proecion funcions. The main funcion of his device is o drive single or muliple series conneced LEDs efficienly from a volage source higher han he LED forward volage by regulaing a consan LED curren. The consan curren regulaion is especially beneficial for LED color accuracy and long LED lifeime. The buil in freewheeling diode and swiching ransisor wih curren sense requires less exernal componens and saves sysem coss. High flexibiliy is achieved by placing low power resisors o adjus oupu currens up o 700mA and he regulaor swiching frequency (yp. 200kHz). An inegraed PWM dimming engine provides a LED dimming funcion by placing a simple RC nework o GND. This feaure is dedicaed for decenralized ligh modules wihou micro conroller involvemen. In addiion o ha an inegraed saus pull down ransisor can be used o simulae a minimum curren flow for decenralized modules o avoid a wrong open load deecion by a highside swich locaed in he body conrol module (BCM). Applicaions Auomoive LED driven Exerior Lighing: Brake, Tail, CHMSL, Dayime Running Ligh, Posiion Ligh Auomoive LED driven Inerior Lighing: Reading Ligh, Dome Ligh, Display Backlighing Type Package Marking TLD5045EJ PG-DSO-8 EP TLD5045 Daashee 3 Rev. 1.0, 2011-05-27
Block Diagram 2 Block Diagram The TLD5045 regulaes he LED curren by monioring he load curren (Peak Curren Measuremen) hrough he inernal swich cycle by cycle. When he curren hrough he swich reaches he hreshold I peak he swich is shu- OFF and i is kep OFF for a ime equal o OFF. Boh I peak and OFF can be fixed hrough few exernal componens. The peak curren I peak is fixed by a resisor conneced o he SET pin while he OFF is fixed by RC nework. As OFF is fixed and he duy cycle depends on V REC, he frequency depends on V REC as well. Refer o Chaper 8.2 for he evaluaion of he swiching frequency. FREQ 6 EN 3 VREC 1 PWMI 5 OFF-Time Conrol ON/OFF Logic Inernal Supply UV+OV Lockou 8 SW inernal PWM Generaion Logic Power- Swich Driver Power Swich Thermal Proecion 2 Peak Curren Measuremen Open Load Deecion Peak Curren Adjusmen 4 SET 7 GND Figure 1 Block Diagram TLD5045 Daashee 4 Rev. 1.0, 2011-05-27
Pin Configuraion 3 Pin Configuraion 3.1 Pin Assignmen VREC TLD5045 1 8 SW 2 7 GND EN 3 6 FREQ SET 4 EP 5 PWMI Figure 2 Pin Configuraion TLD5045 3.2 Pin Definiions and Funcions Pin Symbol Funcion 1 VREC Volage Recirculaion Oupu and Inernal Supply Inpu; This pin is he supply pin of he IC (see block diagram). Furhermore he cahode of he inegraed fas freewheeling diode is conneced o his pin as well. 2 Saus Oupu; Open collecor diagnosic oupu o indicae an open load failure. Refer o Chaper 7 for more deails. 3 EN Enable; Apply logic HIGH signal o enable he device 4 SET SET Inpu; Connec a low power resisor o adjus he oupu curren. 5 PWMI PWM Inpu; PWM signal for dimming LEDs. Connec exernal R and C combinaion o achieve an auo PWM-dimming funcion wih defined frequency and duy cycle. 1) inernal PWM dimming funcion (exernal RC conneced o GND) 2) exernal PWM dimming funcion (µc is conrolling his pin) Refer o Chaper 6 for more deails. 6 FREQ FREQuency Selec Inpu; Connec exernal Resisor and Capacior o GND o se he OFF-ime of he swiching frequency. 7 GND Ground; Connec o sysem ground. Daashee 5 Rev. 1.0, 2011-05-27
Pin Configuraion Pin Symbol Funcion 8 SW Inegraed Power-Swich Oupu; Collecor of he inegraed NPN-power ransisor. EP Exposed Pad; Connec o exernal heaspreading copper area wih elecrically GND (e.g. inner GND layer of he PCB via hermal vias) Daashee 6 Rev. 1.0, 2011-05-27
General Produc Characerisics 4 General Produc Characerisics 4.1 Absolue Maximum Raings Absolue Maximum Raings 1) T j = -40 C o +150 C; all volages wih respec o ground (unless oherwise specified) Pos. Parameer Symbol Limi Values Uni Condiions Min. Max. Volages 4.1.1 VREC (Pin 1) V REC -0.3 45 V Recirculaion and Supply Inpu 4.1.2 (Pin 2) V -0.3 45 V Diagnosic Saus Oupu Volage 4.1.3 (Pin 2) I 150 ma Diagnosic Saus Curren 4.1.4 EN (Pin 3) V EN -0.3 45 V Enable Inpu Volage 4.1.5 SET (Pin 4) V SET -0.3 6 V Peak Curren Adjus Inpu Volage 4.1.6 PWMI (Pin 5) V PWMI -0.3 6 V PWM Inpu Volage 4.1.7 FREQ (Pin 6) V FREQ -0.3 6 V OFF-ime Adjusmen Inpu 4.1.8 SW (Pin 8) Swich Oupu V SW -0.3 45 V Temperaures 4.1.9 Juncion Temperaure T j -40 150 C 4.1.10 Sorage Temperaure T sg -55 150 C ESD Suscepibiliy 4.1.11 ESD Resisiviy all Pins o GND V ESD,HBM -2 2 kv HBM 2) 1) No subjec o producion es, specified by design. 2) ESD suscepibiliy HBM according o EIA/JESD 22-A 114B Noe: Sresses above he ones lised here may cause permanen damage o he device. Exposure o absolue maximum raing condiions for exended periods may affec device reliabiliy. Noe: Inegraed proecion funcions are designed o preven IC desrucion under faul condiions described in he daa shee. Faul condiions are considered as ouside normal operaing range. Proecion funcions are no designed for coninuous repeiive operaion. Daashee 7 Rev. 1.0, 2011-05-27
General Produc Characerisics 4.2 Funcional Range Pos. Parameer Symbol Limi Values Uni Condiions Min. Max. 4.2.1 Exended Supply Volage V REC 5 40 1) parameer deviaions possible 4.2.1 Nominal Supply Volage Range V REC 8 36 V 4.2.2 Oupu curren range I OUT 100 700 ma 4.2.3 Swiching Frequency f SW 50 300 1) khz T j = 25 C o 150 C 4.2.4 Juncion Temperaure T j -40 150 C 1) No subjec o producion es, specified by design. Noe: Wihin he funcional range he IC operaes as described in he circui descripion. The elecrical characerisics are specified wihin he condiions given in he relaed elecrical characerisics able. 4.3 Thermal Resisance Noe: This hermal daa was generaed in accordance wih JEDEC JESD51 sandards. For more informaion, go o www.jedec.org. Pos. Parameer Symbol Limi Values Uni Condiions Min. Typ. Max. 4.3.1 Juncion o Case R hj-case 10 K/W 1) 2) 4.3.2 Juncion o Ambien (2s2p) R hja 40 K/W 1) 3) 1) No subjec o producion es, specified by design. 2) Specified R hj-case value is simulaed a naural convecion on a cold plae seup (all pins and he exposed Pad are fixed o ambien emperaure). Ta=25 C, Power Swich and freewheeling diode are dissipaing 1W. 3) Specified RhJA value is according o Jedec JESD51-2,-7 a naural convecion on FR4 2s2p board; The Produc (Chip+Package) was simulaed on a 76.2 x 114.3 x 1.5 mm board wih 2 inner copper layers (2 x 70µm Cu, 2 x 35µm Cu). According o JESD51-5 a hermal via array under he exposed pad conaced he firs inner copper layer. Ta=25 C, Power Swich and freewheeling diode are dissipaing 1W. Daashee 8 Rev. 1.0, 2011-05-27
Elecrical Characerisics 5 Elecrical Characerisics 5.1 General Parameers Elecrical Characerisics: Buck Regulaor V REC = 8 V o 36 V, T j = -40 C o +150 C, all volages wih respec o ground (unless oherwise specified) Pos. Parameer Symbol Limi Values Uni Condiions Min. Typ. Max. 5.1.1 Volage Drop over Power V Drop,100 0.8 V I peak =100mA Transisor 5.1.2 Volage Drop over Power V Drop,700 1.4 V I peak =700mA Transisor 5.1.3 Freewheeling diode forward V fw,100 0.8 V I peak =100mA volage 5.1.4 Freewheeling diode forward V fw,700 1.4 V I peak =700mA volage 5.1.5 Peak over curren limi I peak_lim 1.4 A 5.1.6 Peak curren accuracy I peak_acc 450 500 550 ma V REC = 12V V EN = 5V V LED = 7.2V R SET = 14kΩ L SW = 220µH f SW = 200kHz 5.1.7 Inpu under volage shudown hreshold V REC,UVOFF 5 V V EN = 5V V REC decreasing; see Figure 3 5.1.8 Inpu volage sarup hreshold V REC,UVON 6 V V EN = 5V V REC increasing; see Figure 3 5.1.9 Inpu over volage shudown hreshold V REC,OVOFF 40.5 V V EN = 5V V REC increasing; see Figure 3 5.1.10 Inpu over volage sarup hreshold V REC,OV 40 V V EN = 5V V REC decreasing; see Figure 3 5.1.11 Swich ON delay don 400 600 ns 1) 5.1.12 Swich OFF delay doff 500 850 ns 1) 5.1.13 Reference Volage a SET pin V SET 1.16 1.225 1.29 V 5.1.14 Pull up curren for FREQ pin I FREQ 5 ma V FREQ =0V 5.1.15 Oscillaor swich off hreshold V FREQ,HIGH 3.2 V 5.1.16 Oscillaor swich on hreshold V FREQ,LOW 1.2 V 1) The minimum swiching ON ime ON mus be greaer han don + doff Daashee 9 Rev. 1.0, 2011-05-27
5.2 Power Supply Monioring Over- and Undervolage shudown If he supply volage V REC drops below he Inpu under volage hreshold volage V REC,UVOFF, he power sage is swiched OFF and he device is in normal consumpion mode (I q,on ). If V REC rises again and reaches he Inpu under volage sarup hreshold V REC,UVON he power sage is resared and he device is back o normal operaion mode. Same behavior applies o overvolage. The inernal saus ransisor is swiching off during an overvolage or undervolage even on V REC. A deailed descripion of he under- and overvolage behavior is displayed in Figure 3 below. V REC V REC,OVhys V REC,OVoff V REC,OVon V REC,UVhys V REC,UVoff V REC,UVon V SW I LED I se pulldown ON pull-down ransisor OFF pulldown ON pull-down ransisor OFF pulldown ON Figure 3 Over- and Undervolage Proecion Daashee 10 Rev. 1.0, 2011-05-27
Enable, Dimming Funcion and Thermal Proecion 6 Enable, Dimming Funcion and Thermal Proecion 6.1 Descripion Enable funcion: A logic high signal on he EN pin urns he device on. A logic low signal on enable pin EN brings he device in sleep mode. The curren consumpion is yp. 0.1µA in his case. The EN pin has an inernal pull down resisor which ensures ha he IC is in sleep mode and he power sage is swiched off in case he pin EN is exernally no conneced. Dimming funcion: The PWMI pin combines wo funcions: 1) PWM dimmming via a µc (3.3Vand 5V µc) 2) Inegraed PWM dimming engine for sandalone soluions in decenralized ligh module (frequency and duy cycle adjusable via exernal R,C nework) A deailed descripion of he PWMI pin is displayed in Figure 4 below. V PWMI PWMI OFF DC=0% V PWMI,OFF Inernal PWM V PWMI,ON PWMI ON DC=100% SW- ON SW - OFF SW- ON SW - OFF SW- ON SW - OFF SW- ON SW - OFF Figure 4 PWMI Pin descripion Daashee 11 Rev. 1.0, 2011-05-27
Enable, Dimming Funcion and Thermal Proecion 6.2 Elecrical Characerisics Enable, Bias, Dimming Funcion and Thermal Proecion Elecrical Characerisics: Enable, Bias, Dimming Funcion and Thermal Proecion V REC = 8 V o 36 V, T j = -40 C o +150 C, all volages wih respec o ground (unless oherwise specified) Pos. Parameer Symbol Limi Values Uni Condiions Min. Typ. Max. 6.2.1 Curren Consumpion, sleep mode 6.2.2 Curren Consumpion, acive mode (Open Load) 6.2.3 Curren Consumpion, acive mode 6.2.4 EN Turn On Threshold 6.2.5 EN Turn Off Threshold 6.2.6 EN high inpu curren 6.2.7 EN low inpu curren 6.2.8 PWMI Turn On Threshold 6.2.9 PWMI Turn Off Threshold 6.2.10 PWMI source curren I q,off 0.1 2 µa V EN = 0V; V REC = 16V I q,on 5 ma V EN = 5.0V; I peak = 0mA (open load); V REC = 16V I q,on 10 ma V EN = 5.0V; I peak = 700mA V REC = 16V V EN,ON 2.8 V V EN,OFF 0.8 V I EN,hi 100 µa V EN = 5V I EN,lo 0 20 µa V EN = 0.5V V PWMI,ON 1 V see Figure 4 V PWMI,OFF 2 V see Figure 4 I PWMI 250 µa R se = 10kΩ V PWMI = 0.5V; 6.2.11 Over emperaure shudown T j,sd 150 175 C 1) 6.2.12 Over emperaure shudown hyseresis T j,sd_hys 15 K 1) 1) Specified by design. No subjec o producion es. Daashee 12 Rev. 1.0, 2011-05-27
Enable, Dimming Funcion and Thermal Proecion 6.2.1 PWM Dimming wih µc conneced o TLD5045 PWMI pin The PWMI pin can be used for PWM dimming. I is a commonly praciced dimming mehod o preven color shif in LED ligh applicaions. V PWMI TPWMI V PWMI,OFF V PWMI,ON I peak OFF SW - OFF SW - ON SW - OFF SW - ON SW - OFF Figure 5 Timing Diagram for LED Dimming wih µc Daashee 13 Rev. 1.0, 2011-05-27
Enable, Dimming Funcion and Thermal Proecion 6.2.2 Inernal PWM dimming Funcion The TLD5045 has an inegraed PWM dimming engine. Via an exernal R PWM and C PWM nework i is possible o achieve a PWM LED curren waveform. The duy cycle and dimming frequency is depending on he size of he exernal componens (see formula in Figure 7). This feaure is specially designed o achieve a sand alone PWM dimming funcion wihou he usage of micro conrollers or exernal logic. This allows a flexible and cos effecive usage of he device in a decenralized ligh module applicaion (refer o applicaion drawing Figure 15). The advanage of a PWM dimming (o reduce he LED load curren) is he change of ligh inensiy only, a consan ligh color. Wih an exernal RC nework a PWM programming beween 100Hz and 1200Hz and Duy Cycles beween 4% and max. 20%. is possible. Figure 6 displays he exernal componens corresponding o he desired PWM frequency and duy cycle. The following seup applies for he able displayed in Figure 6: V REC =12V, V LED =7.2V, L SW =220µH, R SET =14kΩ. R PWMI C PWMI f PWMI DC 216kΩ 64nF 100Hz 4% 216kΩ 32nF 200Hz 4% 216kΩ 21nF 300Hz 4% 216kΩ 16nF 400Hz 4% 87kΩ 150nF 100Hz 10% 87kΩ 75nF 200Hz 10% 87kΩ 50nF 300Hz 10% 87kΩ 37nF 400Hz 10% 44kΩ 265nF 100Hz 20% 44kΩ 132nF 200Hz 20% 44kΩ 88nF 300Hz 20% 44kΩ 66nF 400Hz 20% Figure 6 R PWMI and C PWMI versus f PWMI and DC Daashee 14 Rev. 1.0, 2011-05-27
Enable, Dimming Funcion and Thermal Proecion 6.3 Overemperaure Proecion of he Device A emperaure sensor a he power sage causes he overheaed device o swich OFF o preven desrucion. During over emperaure condiion he inernal ransisor is swiched OFF. Due o he auoresar funcion of he device he saus signal will oggle accordingly. The iming of his paern is dependan on he hermal capabiliy of he applicaion and can be used o disinguish beween open load error and overemperaure condiion. More deails on he overemperaure behavior is displayed in Figure 7 below. V EN H L T j T jsd T jso ΔΤ Ta V SW I LED I peak pulldown OFF pull-down ransisor ON OFF ON OFF ON OFF ON OFF Figure 7 Overemperaure Behavior Daashee 15 Rev. 1.0, 2011-05-27
Open Load Diagnosis 7 Open Load Diagnosis 7.1 Descripion The TLD5045 has an inegraed open load during ON diagnosis. During normal operaion he pin (open collecor oupu) is pulled o GND (inernal ransisor is ON). The open load deecion is realized by monioring he swiching behavior a he SW pin. During an open load even he inegraed power sage a he SW pin will be saically urned ON. If he oupu sage is urned ON for more han he open load diagnosis delay ime ( OL ) an open load condiion is deeced. An open load even will swich OFF he inernal ransisor. If a µc is conneced o he pin an exernal pull up resisor should be placed o achieve a logic HIGH level for he proper open load error signalling reporing. For a iming diagram on he funcionaliy of he open load diagnosis please refer o figure Figure 8 and Figure 9. 7.2 Elecrical Characerisics: Open Load Diagnosis Elecrical Characerisics: Open Load Diagnosis V REC = 8 V o 36 V, T j = -40 C o +150 C, all volages wih respec o ground (unless oherwise specified) Pos. Parameer Symbol Limi Values Uni Condiions Min. Typ. Max. 7.2.1 Open Load diagnosis OL 20 µs DelayTime 7.2.2 Volage Drop over inernal ransisor V Drop, 0.3 V I =150mA Daashee 16 Rev. 1.0, 2011-05-27
Open Load Diagnosis 7.3 Open Load Diagnosis in differen Applicaion Condiions 7.3.1 Ligh module applicaion wihou µc Mos of he ime, he open load diagnosis of he whole ligh module is done via he curren sense of he driver IC (e.g. PROFET) locaed in he ligh conrol module (or BCM module). See Figure 15 for a simplified applicaion schemaic. The ligh module needs o sink a specified minimum curren (e.g. 100mA) o indicae normal operaion. To guaranee his minimum curren also under ligh load condiions (e.g. high efficiency LED bin a high supply volages = min. load curren required) sysem designers ofen have o place resisors in parallel o he applicaion circui (see Resisors conneced o supply lines in Figure 15). When using such resisors conneced beween V S and GND, an open LED diagnosis is no possible anymore. To overcome his issue an inernal ransisor (open collecor) is conneced o he pin of he TLD5045. During normal operaion he pin is LOW and a minimum module curren can be guaraneed. As soon as an open load occurs he inernal ransisor swiches off. Due o his, he curren on he V REC pin decreases below he open load deecion hreshold of he driver IC locaed in he ligh conrol module. Noe: Open Load is only deeced during he ON cycle of he swiching ransisor. During he OFF sae he signal displays wha was deeced in he previous ON sae. V PWMI V PWMI,OFF V PWMI,ON Open Load Even Open Load V SW High - z OL pull -down ransisor ON pull-down ransisor OFF Figure 8 Open Load Diagnosis using Inernal PWM Mode Daashee 17 Rev. 1.0, 2011-05-27
Open Load Diagnosis 7.4 Applicaion wih µc conneced o TLD5045 IC The pin can be conneced direcly o a µc inpu. During an open load condiion he ransisor is OFF. An exernal pull up resisor conneced o V DD is required o signal a logic high signal on he pin during an open load error. Please consider ha his diagnosis funcionaliy is only acive if he device is in acive mode (HIGH poenial a he EN pin). Refer o applicaion drawing Figure 14. V EN High Low V PWMI T PWMI V PWMI,OFF V PWMI,ON SW - OFF SW - ON SW - OFF SW - ON SW - OFF V SW High - z Open Load Even Open Load OL pull-down ransisor ON pull-down ransisor OFF Figure 9 Open Load diagnosis via µc conneced o pin Daashee 18 Rev. 1.0, 2011-05-27
Applicaion Informaion 8 Applicaion Informaion Noe: The following informaion is given as a hin for he implemenaion of he device only and shall no be regarded as a descripion or warrany of a cerain funcionaliy, condiion or qualiy of he device. 8.1 Oupu Peak Curren Adjusmen via R SET The exernal resisor R SET is used o adjus he peak curren of he regulaor. Maximum achievable peak curren is 700mA and minimum achievable peak curren is 100mA. The SET pin provides an inernally fixed volage level a yp.: 1.225V. Ou of his consideraions he equaion is: I peak = (1.225V / R SET ) * 5710 The facor 5710 is derived from following consideraions: Ipeak, max = 700mA (R SET = 10kΩ) Ipeak,min = 100mA (R SET = 70kΩ) Inernal comperaor volage a SET pin = 1.225V. The circuiry behind he SET pin is adjusing higher peak currens wih lower R SET values. The R SET value should be in he range from 10kΩ o 70kΩ o achieve he requesed peak curren range. The following seup applies for he able displayed in Figure 10: V REC =12V, V LED =7.2V, L SW =220µH. I PEAK [ma] 100 200 300 400 500 600 700 R SET [kω] 70 35 23 18 14 12 10 Figure 10 R SET Resisor Selecion Daashee 19 Rev. 1.0, 2011-05-27
Applicaion Informaion 8.2 Swiching Frequency Deerminaion Wih he exernal R FREQ, C FREQ and R COMP nework, i is possible o adjus he swiching frequency of he regulaor. To ensure a sable frequency over a broad range of inpu volage V REC an exernal resisor R COMP can be used. The following seup applies for he able displayed in Figure 12: V REC =12V, V LED =7.2V, L SW =220µH, R SET =14kΩ. 1 VREC R COMP FREQ 6 TLD5045 GND 7 R FREQ C FREQ Figure 11 Seing OFF Time of Regulaor wih Exernal R FREQ, C FREQ Nework R comp R freq C freq f sw off 255.8kΩ 17.1kΩ 220pF 50kHz 6.47μs 115.8kΩ 7.7kΩ 220pF 100kHz 3.19μs 69.7kΩ 4.6kΩ 220pF 150kHz 2.12μs 46.8kΩ 3.1kΩ 220pF 200kHz 1.59μs 72.8kΩ 4.9kΩ 100pF 250kHz 1.27μs 52.7kΩ 3.5kΩ 100pF 300kHz 1.06μs Figure 12 R FREQ, C FREQ versus f SW Table Daashee 20 Rev. 1.0, 2011-05-27
Applicaion Informaion V EN High Low V FREQ V FREQ,high V FREQ,low I LED I se=i peak I min I ripple V SW up on off down V REC+V fw V drop Transisor Diode T Diode T Diode T Diode T Diode Figure 13 Theoreical Operaing Waveforms Daashee 21 Rev. 1.0, 2011-05-27
Applicaion Informaion 8.3 TLD5045 in differen LED Applicaions 8.3.1 TLD5045 in a Body Conrol Module (BCM) wih µc Inerface Figure 14 provides a simplified applicaion wih wo high brighness LEDs in series. A µc is conrolling he EN pin o pu he device ino sleep/acive mode. Also he PWMI pin can be direcly conrolled via a µc por if PWM dimming of he LED curren is required. The open load pin moniors he load condiion of he applicaion and gives feedback o he µc. An exernal pull up resisor is recommended o achieve a logic HIGH signal during an open load error (inernal saus ransisor is swiched OFF and he pin is high ohmic an exernal pull up resisor ensures a logic HIGH signal). The exernal low power resisor R SET is used o se he required peak curren for he LED load (refer o Figure 10 for more deails). To se he desired swiching frequency of he buck regulaor he exernal R FREQ and C FREQ nework mus be conneced o GND (reference values are given in Figure 12). Vs = 5V o 40V I LED L SW C REC 1 VREC SW 8 open load saus conneced o µc R V DD 2 GND 7 R FREQ C FREQ FREQ 6 connec o µc pin 3 EN R COMP R SET 4 SET TLD5045 PWMI 5 V REC R EMC PWM dimming via µc Figure 14 Simplified Applicaion Diagram TLD5045 Noe: This is a very simplified example of an applicaion circui. The funcion mus be verified in he real applicaion Daashee 22 Rev. 1.0, 2011-05-27
Applicaion Informaion 8.3.2 Decenralized Ligh Module Applicaion - DLM (Inpu configuraion 1) The connecion beween he Body Conrol Module (BCM) and he Decenralized Ligh Module is realized via one supply line and one GND connecion. The supply line could change beween wo differen operaion modes: 1) Ligh Funcion 1 - Dayime Running Ligh (DRL) mode: If he supply line is permanenly ON, he DRL applicaion which requires higher LED curren (e.g. 400mA) is acive. The proper R SET resisor should be placed o achieve he desired load curren (e.g 18kΩ). 2) Ligh Funcion 2 - Posiion Ligh (PL) mode: During a PWM signal (e.g. 200Hz) on he supply line he mean LED curren is reduced o a lower level (e.g. 50mA) and he applicaion is enering ino PL mode. The enable pin of he TLD5045 is a high volage pin (max. 45V) and can be direcly conneced via a resisor R EN before he reverse polariy proecion diode of he module o achieve a fas capure of he PWM signal. The PWMI pin is conneced o GND (inverse logic = ON). To simulae a module curren during ligh load condiions, he pin can be conneced via a resisor o he supply volage line. (refer o Chaper 7 for a deailed descripion of he behavior) For a decenralized soluion wihou micro conroller involvemen he possibiliy o connec a PTC resisor a he SET pin is a cos effecive soluion o proec he LED load from hermal desrucion. Vba Wire Harness Inducance Decenralized Ligh Module I LED Ligh Funcion 1 (e.g. DRL) BCM - module GND R EN I Open_load L SW 1 VREC SW 8 C REC 3 EN 5 PWMI GND 7 R FREQ C FREQ FREQ 6 R COMP I,PD 2 SET 4 V REC R SET TLD5045 R PTC Figure 15 Applicaion Diagram of Decenralized Ligh Module wihou µc (inpu config 1) This is a very simplified example of an applicaion circui. The funcion mus be verified in he real applicaion Daashee 23 Rev. 1.0, 2011-05-27
Applicaion Informaion 8.3.3 Decenralized Ligh Module Applicaion - DLM (Inpu configuraion 2) In his paricular inpu configuraion wo supply lines are ied ogeher on he DLM. The following inpu saes mus be considered o disinguish beween Ligh Funcion 1 (DRL mode) and Ligh Funcion 2 (PL mode). 1) Condiion: DRL = ON, PL = OFF. Desired funcion: DRL mode (e.g. 400mA LED load curren) 2) Condiion: DRL = OFF, PL = ON. Desired funcion: PL mode (e.g. 50mA LED load curren) 3) Condiion: DRL = ON, PL =ON. Desired funcion: PL mode (e.g. 50mA LED load curren) To achieve a lower mean LED load curren during he PL mode he inegraed PWM engine is a useful feaure. The exernal R PWM and C PWM circui predefines a dedicaed PWM frequency and duy cycle. (for deails refer o Figure 11) To simulae a module curren during ligh load condiions he pin can be conneced via resisors o boh supply volage lines. (refer o Chaper 7 for a deailed descripion of he behavior) For a decenralized soluion wihou micro conroller involvemen he possibiliy o connec a PTC resisor a he SET pin is a cos effecive soluion o proec he LED load from hermal desrucion. Vba Wire Harness Inducance Decenralized Ligh Module Vba Ligh Funcion 1 (e.g. DRL) I LED BCM - module Ligh Funcion 2 (e.g. PL) T DIM2 GND I Open_load 1 VREC SW 8 L SW R EN C REC 3 EN T DIM1 5 PWMI GND 7 R FREQ C FREQ RDIM1 C PWM R PWM FREQ 6 R COMP I,PD 2 SET 4 R SET V REC TLD5045 R PTC Figure 16 Applicaion Diagram of Decenralized Ligh Module wihou µc (inpu config 2) This is a very simplified example of an applicaion circui. The funcion mus be verified in he real applicaion Daashee 24 Rev. 1.0, 2011-05-27
Applicaion Informaion 8.3.4 Decenralized Ligh Module Applicaion - DLM (Inpu configuraion 3) A permanen supply chooses he Ligh Funcion 1 (DRL mode) and a second dedicaed PWM supply beween 100Hz and 200Hz swiches o Ligh Funcion 2 (PL mode). For his inpu configuraion i is possible o connec he PWM dimming oupu of he BCM direcly o he PWMI inpu of he TLD5045. To simulae a module curren during ligh load condiions he pin can be conneced via a resisor o he permanen supply volage line. (refer o Chaper 7 for a deailed descripion of he behavior) For a decenralized soluion wihou micro conroller involvemen he possibiliy o connec a PTC resisor a he SET pin is a cos effecive soluion o proec he LED load from hermal desrucion. (for deails refer o Figure 15) Vba Wire Harness Inducance Decenralized Ligh Module I LED Vba Ligh Funcion 1 (e.g. DRL) BCM - module Ligh Funcion 2 (e.g. PL) GND L SW I Open_load C REC 1 VREC SW 8 R EN 3 EN R LIM 5 PWMI GND 7 R FREQ C FREQ D LIM R EMC FREQ 6 R COMP I,PD 2 SET 4 R SET V REC TLD5045 R PTC Figure 17 Applicaion Diagram of Decenralized Ligh Module wihou µc (inpu config 3) This is a very simplified example of an applicaion circui. The funcion mus be verified in he real applicaion Daashee 25 Rev. 1.0, 2011-05-27
Package Oulines 9 Package Oulines 0.35 x 45 +0 0.1-0.1 1.27 Sand Off (1.45) 1.7 MAX. 0.41±0.09 2) 0.2 M C A-B D C 0.08 C Seaing Plane 8x 3.9 ±0.1 1) 0.1 CD2x 0.19 +0.06 0.64 ±0.25 8 MAX. 6 ±0.2 0.2 M D 8x D Index Marking 8 1 4 5 A B 0.1 C A-B 2x 4.9 ±0.1 1) Boom View 3 ±0.2 1 4 8 5 2.65 ±0.2 1) Does no include plasic or meal prorusion of 0.15 max. per side 2) Dambar prorusion shall be maximum 0.1 mm oal in excess of lead widh 3) JEDEC reference MS-012 variaion BA PG-DSO-8-27-PO V01 Figure 18 Ouline PG-DSO-8 EP Green Produc (RoHS complian) To mee he world-wide cusomer requiremens for environmenally friendly producs and o be complian wih governmen regulaions he device is available as a green produc. Green producs are RoHS-Complian (i.e Pb-free finish on leads and suiable for Pb-free soldering according o IPC/JEDEC J-D-020). For furher package informaion, please visi our websie: hp://www.infineon.com/packages. Dimensions in mm Daashee 26 Rev. 1.0, 2011-05-27
Revision Hisory 10 Revision Hisory Version Dae Changes Rev. 1.0 2011-05-27 Iniial Daa shee for TLD5045 Daashee 27 Rev. 1.0, 2011-05-27
Ediion 2011-05-27 Published by Infineon Technologies AG 81726 Munich, Germany 2011 Infineon Technologies AG All Righs Reserved. Legal Disclaimer The informaion given in his documen shall in no even be regarded as a guaranee of condiions or characerisics. Wih respec o any examples or hins given herein, any ypical values saed herein and/or any informaion regarding he applicaion of he device, Infineon Technologies hereby disclaims any and all warranies and liabiliies of any kind, including wihou limiaion, warranies of non-infringemen of inellecual propery righs of any hird pary. Informaion For furher informaion on echnology, delivery erms and condiions and prices, please conac he neares Infineon Technologies Office (www.infineon.com). Warnings Due o echnical requiremens, componens may conain dangerous subsances. For informaion on he ypes in quesion, please conac he neares Infineon Technologies Office. Infineon Technologies componens may be used in life-suppor devices or sysems only wih he express wrien approval of Infineon Technologies, if a failure of such componens can reasonably be expeced o cause he failure of ha life-suppor 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.