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automotive data sheet rev. 1.0, 2013-08-08 TLD1125EL 1 channel high side current source infineon ? basic led driver
data sheet 2 rev. 1.0, 2013-08-08 TLD1125EL 1 overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2 pin definitions and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 general product characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.2 functional range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.3 thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5en pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.1 en function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.2 internal supply pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.3 en unused . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.3.1 en - pull up to vs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.3.2 en - direct connection to vs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6pwmi pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.1 pwm dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.2 internal pwm unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.3 electrical characteristics inte rnal supply / en / pwmi pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 7 in_set pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.1 output current adjustment via rset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.2 smart input pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8st pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 8.1 diagnosis selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 8.2 diagnosis output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 8.3 disable input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 9d pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 10 load diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 10.1 open load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 10.2 short circuit to gnd detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 10.3 electrical characteristics in_set pin and load diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 7 11 power stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 11.1 protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 11.1.1 over load behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 11.1.2 reverse battery protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 11.2 electrical characteristics power stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 12 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 12.1 further application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 13 package outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 14 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
pg-ssop14 type package marking TLD1125EL pg-ssop14 TLD1125EL data sheet 3 rev. 1.0, 2013-08-08 1 channel high side current source basic led driver TLD1125EL 1overview features ? 1 channel device with integrated output stage (cu rrent source), optimized to drive leds ? output current up to 360ma ? low current consumption in sleep mode ? pwm-operation supported via vs- and en-pin ? integrated pwm dimming engine to provide two led brightness levels without exter nal logic (e.g. c) ? output current adjustable via external low power resistor and possibility to connect ptc resistor for led protection during over temperature conditions ? reverse polarity protection ? overload protection ? undervoltage detection ? open load and short circuit to gnd diagnosis ? wide temperature range: -40 c < t j < 150 c ? pg-ssop14 package with exposed heatslug ? green product (rohs compliant) ? aec qualified description the basic led driver TLD1125EL is a one channel high side driver ic with integrated ou tput stage. it is designed to control leds with a current up to 360 ma. in typical au tomotive applications the device is capable to drive i.e. 3 red leds with a current up to 180 ma, which is limit ed by thermal cooling aspects. the output current is controlled practically independent of load and supply voltage changes. table 1 product summary operating voltage v s(nom) 5.5 v? 40 v maximum voltage v s(max) v out(max) 40 v nominal output (load) current i out(nom) 180 ma when using a supply voltage range of 8v - 18v (e.g. automotive car battery). currents up to i out(max) possible in applications with low thermal resistance r thja maximum output (load) current i out(max) 360 ma; depending on thermal resistance r thja
data sheet 4 rev. 1.0, 2013-08-08 TLD1125EL overview protective functions - esd protection - under voltage lock out - over load protection - over temperature protection - reverse polarity protection diagnostic functions - ol detection - sc to vs (indicated by ol diagnosis) - sc to gnd detection applications designed for exterior led lighting applications such as tail/ brake light, turn indicator, position light, side marker,... the device is also well suited for in terior led lighting applications such as ambient lighting, interior illumination and dash board lighting. output current accuracy at r set = 12 k k lt 2250 7% current consumption in sleep mode i s(sleep,typ) 0.1 a table 1 product summary
TLD1125EL block diagram data sheet 5 rev. 1.0, 2013-08-08 2 block diagram figure 1 basic block diagram output control out internal supply thermal protection current adjust TLD1125EL gnd en vs in_set d pwmi status st
data sheet 6 rev. 1.0, 2013-08-08 TLD1125EL pin configuration 3 pin configuration 3.1 pin assignment figure 2 pin configuration 11 12 13 14 TLD1125EL ep 10 4 3 2 1 5 nc st nc out en nc nc vs vs pwmi 6 7 in_set d 9 8nc gnd
TLD1125EL pin configuration data sheet 7 rev. 1.0, 2013-08-08 3.2 pin definitions and functions pin symbol input/ output function 1, 2 vs ? supply voltage; battery supply, connect a decoupling capacitor (100 nf - 1 f) to gnd 3eni enable pin 4nc? pin not connected 5pwmii/o pwm input 6 in_set i/o input / set pin; connect a low power resistor to adjust the output current 7d i/o delay for open load detection 8nc? pin not connected 9gnd? 1) ground 1) connect all gnd-pins together. 10 st i/o status pin 11 nc ? pin not connected 12 out o output 13 nc ? pin not connected 14 nc ? pin not connected exposed pad gnd ? 1) exposed pad; connect to gnd in application
data sheet 8 rev. 1.0, 2013-08-08 TLD1125EL general product characteristics 4 general product characteristics 4.1 absolute maximum ratings note: stresses above the ones listed here may cause perm anent damage to the device. exposure to absolute maximum rating conditions for extended periods may affect device reliability. note: integrated protection functions are designed to prevent ic destruction under fault conditions described in the data sheet. fault conditions are considered as ?outside? normal operating range. protection functions are not designed for continuous repetitive operation. absolute maximum ratings 1) t j = -40 c to +150 c; all voltages with respect to ground, positive current flowing into pi n for input pins (i), positive currents flowing out of the i/o and output pins (o) (unless otherwise specified) 1) not subject to production test, specified by design pos. parameter symbol limit values unit conditions min. max. voltages 4.1.1 supply voltage v s -16 40 v ? 4.1.2 input voltage en v en -16 40 v ? 4.1.3 input voltage en related to v s v en(vs) v s - 40 v s + 16 v ? 4.1.4 input voltage en related to v out v en - v out v en - v out -16 40 v ? 4.1.5 output voltage v out -1 40 v ? 4.1.6 power stage voltage v ps = v s - v out v ps -16 40 v ? 4.1.7 input voltage pwmi v pwmi -0.3 6 v ? 4.1.8 in_set voltage v in_set -0.3 6 v ? 4.1.9 d voltage v d -0.3 6 v ? 4.1.10 status voltage v st -0.3 6 v ? currents 4.1.11 in_set current i in_set ? ? 2 8 ma ? diagnosis output 4.1.12 d current i d -0.5 0.5 ma ? 4.1.13 output current i out ?390ma? temperatures 4.1.14 junction temperature t j -40 150 c? 4.1.15 storage temperature t stg -55 150 c? esd susceptibility 4.1.16 esd resistivity to gnd v esd -2 2 kv human body model (100 pf via 1.5 k ) 2) 2) esd susceptibility, human body model ?hb m? according to ansi/ esda/jedec js-001-2011 4.1.17 esd resistivity all pins to gnd v esd -500 500 v cdm 3) 3) esd susceptibility, charged device model ?cdm? according to jesd22-c101e 4.1.18 esd resistivity corner pins to gnd v esd -750 750 v cdm 3)
TLD1125EL general product characteristics data sheet 9 rev. 1.0, 2013-08-08 4.2 functional range note: within the functional range the ic operates as de scribed in the circuit description. the electrical characteristics are specifi ed within the conditions given in the re lated electrical ch aracteristics table. 4.3 thermal resistance pos. parameter symbol limit values unit conditions min. max. 4.2.19 supply voltage range for normal operation v s(nom) 5.5 40 v ? 4.2.20 power on reset threshold v s(por) ?5v v en = v s r set =12k i out = 80% i out(nom) v out =2.5v 4.2.21 junction temperature t j -40 150 c? pos. parameter symbol limit values unit conditions min. typ. max. 4.3.1 junction to case r thjc ?810k/w 1) 2) 1) not subject to production test, specifi ed by design. based on simulation results. 2) specified r thjc value is simulated at natural convection on a cold plate setup (all pins and t he exposed pad are fixed to ambient temperature). t a = 85c, total power dissipation 1.5 w. 4.3.2 junction to ambient 1s0p board r thja1 ? ? 61 56 ? ? k/w 1) 3) t a =85c t a = 135 c 3) the r thja values are according to jedec jesd51-3 at natural c onvection on 1s0p fr4 board. the product (chip + package) was simulated on a 76.2 x 114.3 x 1.5 mm 3 board with 70m cu, 300 mm 2 cooling area. total power dissipation 1.5 w distributed statically and ho mogenously over power stage. 4.3.3 junction to ambient 2s2p board r thja2 ? ? 45 43 ? ? k/w 1) 4) t a =85c t a = 135 c 4) the r thja values are according to jedec jesd51-5,-7 at natu ral convection on 2s2p fr4 board. the product (chip + package) was simulated on a 76.2 x 114.3 x 1.5 mm 3 board with 2 inner copper layers (outside 2 x 70 m cu, inner 2 x 35m cu). where applicable, a thermal via array under the expos ed pad contacted the first inne r copper layer. total power dissipation 1.5 w distributed statically and homogenously over power stage.
data sheet 10 rev. 1.0, 2013-08-08 TLD1125EL en pin 5en pin the en pin is a dual function pin: figure 3 block diagram en pin note: the current consumption at the en-pin i en needs to be added to the total device current consumption. the total current consumption is the sum of the currents at the vs-pin i s and the en-pin i en . 5.1 en function if the voltage at the pin en is below a threshold of v en(off) the basic led driver ic will enter sleep mode. in this state all internal functions are switched off, the current consumption is reduced to i s(sleep) . a voltage above v en(on) at this pin enables the device after the power on reset time t por . figure 4 power on reset v en en output control internal supply v en t t 80% t por i out 100% t v s
TLD1125EL en pin data sheet 11 rev. 1.0, 2013-08-08 5.2 internal supply pin the en pin can be used to supply the internal logic. ther e are two typical application conditions, where this feature can be used: 1) in ?dc/dc control buck? co nfigurations, where the voltage v s can be below 5.5v. 2) in configurations, where a pwm signal is applied at the vbatt pin of a light module. the buffer capacitor c buf is used to supply the basic led driver ic during vbatt low ( v s low) periods. this feature can be used to minimize the turn-on time to the values specified in pos. 11.2.15 . otherwise, the power-on reset delay time t por ( pos. 6.3.8 ) has to be considered. the capacitor can be calculated using the following formula: (1) see also a typical application drawing in chapter 12 . figure 5 external circuit when applying a fast pwm signal on v batt c buf t low max () i en ls () v s v d1 ? v spor () ? -------------------------------------------------- - ? = r set c buf v batt gnd d 1 output control out internal supply thermal protection current adjust basic led driver gnd en vs in_set
data sheet 12 rev. 1.0, 2013-08-08 TLD1125EL en pin figure 6 typical waveforms when applying a fast pwm signal on v batt the parameter t on(vs) is defined at pos. 11.2.15 . the parameter t off(vs) depends on the load and supply voltage v batt characteristics. 5.3 en unused in case of an unused en pin, there are two different ways to connect it: 5.3.1 en - pull up to vs the en pin can be connected with a pull up resistor (e.g. 10 k ) to v s potential. in this configuration the basic led driver ic is always enabled. 5.3.2 en - direct connection to vs the en pin can be connected directly to the vs pin (i c always enabled). this configuration has the advantage (compared to the configuration described in chapter 5.3.1 ) that no additional external component is required. v batt t t 20% 80% t on(vs) i out 100% v en t switch off behavior depends on v batt and load characteristics
TLD1125EL pwmi pin data sheet 13 rev. 1.0, 2013-08-08 6pwmi pin the pwmi pin is designed as a dual function pin. figure 7 block diagram pwmi pin the pin can be used for pwm-dimming via a push-pull stage of a micro controller, whic h is connecting the pwmi- pin to a low or high potential. note: the micro controller?s push-pull stage has to able to sink currents according to pos. 6.3.18 to activate the device. furthermore, the device offers also an internal pwm unit by connecting an external-rc network according to figure 10 . 6.1 pwm dimming a pwm signal can be applied at the pwmi pin for led brightness regulation. the dimming frequency can be adjusted in a very wide range (e.g. 400 hz). the pwmi pin is low active. turn on/off thresholds v pwmi(l) and v pwmi(h) are specified in parameters pos. 6.3.15 and pos. 6.3.16 . figure 8 turn on and turn off time for pwmi pin usage i pwmi (l) v pwmi pwmi output control v pwmi t t 20% 80% t on(pwmi ) i out 100% t off(pwmi )
data sheet 14 rev. 1.0, 2013-08-08 TLD1125EL pwmi pin 6.2 internal pwm unit connecting a resistor and a capacitor in parallel on the pwmi pin enables the internal pulse width modulation unit. the following figure shows the charging and disc harging defined by the rc -network according to figure 10 and the internal pwm unit. figure 9 pwmi operating voltages the pwm duty cycle (dc) and the pwm frequency can be adjusted using the formulas below. please use only typical values of v pwmi(l) , v pwmi(h) and i pwmi(on) for the calculation of t pwmi(on) and t pwmi(off) (as described in pos. 6.3.15 to pos. 6.3.18 ). (2) (3) (4) (5) out of this equations the required c pwmi and r pwmi can be calculated: (6) (7) outputs on v pwmi outputs off t out- on out - off v pwmi(h) v pwmi(l) internal pwm out- on out - off out- on out - off out- on out - off t pwmi on () r ? pwmi c pwmi ln v pwmi h () i pwmi on () r pwmi ? ? v pwmi l () i pwmi on () r pwmi ? ? -------------------------------------------------------------------------------- ?? ?? ?? ?? = t pwmi off () r pwmi c ? pwmi ln v pwmi h () v pwmi l () ------------------------- - ?? ?? ?? ? = f pwmi 1 t pwmi on () t pwmi off () + --------------------------------------------------------- = dc t pwmi on () f pwmi ? = c pwmi i ? pwmi on () t pwmi off () v pwmi l () v pwmi h () ------------------------- - ?? ?? ?? t pwmi on () t pwmi off () ------------------------ 1 ? ?? ln v pwmi l () v pwmi h () ------------------------- - ?? ?? ?? v pwmi l () v pwmi l () v pwmi h () ------------------------- - ?? ?? ?? t pwmi on () t pwmi off () ------------------------ v pwmi h () ? ? ? ------------------------------------------------------------------------------------------------------------------------------- ------------------------------------ = r pwmi t pwmi off () c pwmi ln v pwmi h () v pwmi l () ------------------------- - ?? ?? ?? ? --------------------------------------------------------------- =
TLD1125EL pwmi pin data sheet 15 rev. 1.0, 2013-08-08 see figure 10 for a typical external circuitry. note: in case of junction temperatures above t j(crt) ( pos. 11.2.16 ) the device provides a temperature dependent current reduction feature as descirbed in chapter 11.1.1 . in case of output current reduction i in_set is reduced as well, which leads to increased turn on-times t pwmi(on) , because the c pwmi is charged slower. the turn off-time t pwmi(off) remains the same. figure 10 typical circuit using internal pwm unit 6.3 electrical characteristics inte rnal supply / en / pwmi pin electrical characteristics internal supply / en / pwmi pin unless otherwise specified: v s = 5.5 v to 40 v, t j = -40 c to +150 c, r set =12k all voltages with respect to ground, positive current flowing into pin for input pins (i ), positive currents flowing out of the i/o and output pins (o) (unless otherwise specified) pos. parameter symbol limit values unit conditions min. typ. max. 6.3.1 current consumption, sleep mode i s(sleep) ?0.12a 1) v en = 0.5 v t j < 85 c v s = 18 v v out = 3.6 v 6.3.2 current consumption, active mode i s(on) ? ? ? ? ? ? 1.4 0.75 1.5 ma 2) v pwmi = 0.5 v i in_set = 0a t j < 105 c v s = 18 v v out = 3.6v v en =5.5v v en =18v 1) r en = 10 k between vs and en-pin r set v batt gnd output control out internal supply thermal protection current adjust basic led driver gnd en vs in_set 10k d pwmi c d r pwmi c pwmi
data sheet 16 rev. 1.0, 2013-08-08 TLD1125EL pwmi pin 6.3.3 current consumption, device disabled via st i s(dis,st) ? ? ? ? ? ? 1.4 0.65 1.4 ma 2) v s = 18 v t j < 105 c v st = 5 v v en =5.5v v en =18v 1) r en = 10 k between vs and en-pin 6.3.4 current consumption, device disabled via in_set i s(dis,in_set) ? ? ? ? ? ? 1.4 0.7 1.4 ma 2) v s = 18 v t j < 105 c v in_set = 5 v v en =5.5v v en =18v 1) r en = 10 k between vs and en-pin 6.3.5 current consumption, device disabled via pwmi i s(dis,pwmi) ? ? ? ? ? ? 1.6 0.75 1.6 ma 2) v s = 18 v t j < 105 c v pwmi = 3.4 v v en =5.5v v en =18v 1) r en = 10 k between vs and en-pin 6.3.6 current consumption, active mode in fault detection condition with st- pin unconnected i s(fault,stu) ? ? ? ? ? ? 1.7 1.1 1.8 ma 2) v s = 18 v t j < 105 c r set = 12 k v pwmi = 0.5 v v out = 18 v or 0 v v en =5.5v v en =18v 1) r en = 10 k between vs and en-pin 6.3.7 current consumption, active mode in fault detection condition with st- pin connected to gnd i s(fault,stg) ? ? ? ? ? ? 6.0 4.9 5.9 ma 2) v s = 18 v t j < 105 c r set = 12 k v pwmi = 0.5 v v out = 18 v or 0 v v st = 0 v v en =5.5v v en =18v 1) r en = 10 k between vs and en-pin 6.3.8 power-on reset delay time 3) t por ?? 25s 1) v s = v en =0 13.5 v v out(nom) = 3.6 0.3v i out =80% i out(nom) electrical characteristics internal supply / en / pwmi pin (cont?d) unless otherwise specified: v s = 5.5 v to 40 v, t j = -40 c to +150 c, r set =12k all voltages with respect to ground, positive current flowing into pin for input pins (i ), positive currents flowing out of the i/o and output pins (o) (unless otherwise specified) pos. parameter symbol limit values unit conditions min. typ. max.
TLD1125EL pwmi pin data sheet 17 rev. 1.0, 2013-08-08 6.3.9 required supply voltage for output activation v s(on) ?? 4v v en = 5.5 v v out = 3 v i out =50% i out(nom) 6.3.10 required supply voltage for current control v s(cc) ?? 5.2v v en = 5.5 v v out = 3.6 v i out 90% i out(nom) 6.3.11 en turn on threshold v en(on) ?? 2.5v? 6.3.12 en turn off threshold v en(off) 0.8 ? ? v ? 6.3.13 en input current during low supply voltage i en(ls) ?? 1.8ma 1) v s = 4.5 v t j < 105 c v en = 5.5 v 6.3.14 en high input current i en(h) ? ? ? ? ? ? ? ? 0.1 0.1 1.65 0.45 ma t j < 105 c v s = 13.5 v, v en = 5.5 v v s = 18 v, v en = 5.5 v v s = v en = 18 v 1) v s = 18 v, r en = 10 k between vs and en-pin 6.3.15 pwmi (active low) switching low threshold (output on) v pwmi(l) 1.5 1.85 2.3 v 1)4) v s = 8...18 v 6.3.16 pwmi(active low) switching high threshold (output off) v pwmi(h) 2.45 2.85 3.2 v 1)4)5) v s = 8...18 v 6.3.17 pwmi switching threshold difference v pwmi(h) - v pwmi(l) v pwmi 0.75 1 1.10 v 1)4)5) v s = 8...18 v 6.3.18 pwmi (active low) low input current with active channels (voltage < v pwmi(l) ) i pwmi(on) i in_set *3.1 i in_set *4 i in_set *4.9 a 1) t j = 25...115 c i in_set = 100 a v pwmi = 1.7 v v en = 5.5 v v s = 8...18 v 6.3.19 pwmi(active low) high input current i pwmi(off) -5 ? 5 a v pwmi = 5 v v en = 5.5 v v s = 8...18 v 1) not subject to production test, specified by design 2) the total device current consumption is the sum of the currents i s and i en(h) , please refer to pos. 6.3.14 3) see also figure 4 4) parameter valid if an external pwm signal is applied 5) if ttl level compatibility is required, use c open drain ou tput with pull up resistor electrical characteristics internal supply / en / pwmi pin (cont?d) unless otherwise specified: v s = 5.5 v to 40 v, t j = -40 c to +150 c, r set =12k all voltages with respect to ground, positive current flowing into pin for input pins (i ), positive currents flowing out of the i/o and output pins (o) (unless otherwise specified) pos. parameter symbol limit values unit conditions min. typ. max.
data sheet 18 rev. 1.0, 2013-08-08 TLD1125EL in_set pin 7 in_set pin the in_set pin is a multiple function pin for ou tput current definition, input and diagnostics: figure 11 block diagram in_set pin 7.1 output current ad justment via rset the current adjustment can be done by placing a low power resistor ( r set ) at the in_set pin to ground. the dimensioning of the resistor can be done using the formula below: (8) the gain factor k ( r set * output current) is specified in pos. 11.2.4 and pos. 11.2.5 . the current through the r set is defined by the resistor itself and the reference voltage v in_set(ref) , which is applied to the in_set during supplied device. 7.2 smart input pin the in_set pin can be connected via r set to the open-drain output of a c or to an external nmos transistor as described in figure 12 . this signal can be used to turn off the ou tput stage of the ic. a minimum in_set current of i in_set(act) is required to turn on the output stage. this feature is implemented to prevent glimming of leds caused by leakage currents on the in_set pin, see figure 15 for details. in addition, the in_set pin offers the diagnostic feedback informati on, if the status pin is co nnected to gnd. another dia gnostic possibility is shown in figure 13 , where the diagnosis information is provided via the st pin (refer to chapter 8 and chapter 10 ) to a micro controller. in case of a fault event with the st pin connected to gnd the in_set voltage is increased to v in_set(ol/sc) pos. 10.3.2 . therefore, the device has two voltage doma ins at the in_set-pin, which is shown in figure 16 . i in_set v in_set(ol/sc) in_set gnd v in_set logic high impedance r set k i out ----------- =
TLD1125EL in_set pin data sheet 19 rev. 1.0, 2013-08-08 figure 12 schematics in_set interface to c, diagnosis via in_set pin figure 13 schematics in_set interface to c, diagnosis via st pin the resulting switching times are shown in figure 14 : figure 14 switching times via in_set r set /2 microcontroller (e.g. xc866) out v ddp = 5 v current adjust in_set gnd basic led driver r set /2 in status st microcontroller (e.g. xc866) out v ddp = 5 v current adjust in_set gnd basic led driver in status st r set optional i in_ set t t 20% 80% t on(in_set ) i out 100% t off(in _ set)
data sheet 20 rev. 1.0, 2013-08-08 TLD1125EL in_set pin figure 15 i out versus i inset figure 16 voltage domains for in_set pin, if st pin is connected to gnd i in_set(act) i in_set [a] i out [ma] k = i outx * v in_set(ref) / i in_setx i outx i in_setx v in _s e t (ref ) m ax v in_ set(ol/sc)min v in_set v in _set(ol /sc)max normal operation and high temperature current reduction range diagnostic voltage range
TLD1125EL st pin data sheet 21 rev. 1.0, 2013-08-08 8st pin the st pin is a multiple function pin. figure 17 block diagram st pin 8.1 diagnosis selector if the status pin is unconnected or connected to gnd via a high ohmic resistor ( v st to be below v st(l) ), the st pin acts as diagnosis output pin. in norma l operation (device is activated) the st pin is pulled to gnd via the internal pull down current i st(pd) . in case of an open load or short circuit to gnd condition the st pin is switched to v st(ol/sc) after the filter time t d (see equation (11) ). if the device is operated in pwm operation via the vs an d/or en pins the st pin should be connected to gnd via a high ohmic resistor (e.g. 470k ) to ensure proper device behavior duri ng fast rising vs and/or en slopes. if the st pin is shorted to gnd the diagnostic feed back is performed via the in_set-pin, which is shown in chapter 7.2 and chapter 10 . 8.2 diagnosis output if the status pin is unconne cted or connected to gnd via a high ohmic resistor ( v st to be below v st(l) ), it acts as a diagnostic output. in case of a fault condition the st pin rises its voltage to v st(ol/sc) ( pos. 10.3.7 ). details are shown in chapter 10 . 8.3 disable input if an external voltage higher than v st(h) ( pos. 10.3.5 ) is applied to the st pin, th e device is switched off. this function is used for applications, where multiple drivers should be used for one light function. it is possible to combine the drivers? fault diagnosis via the st pins. if a single led chain fails , the entire light function is switched off. in this scenario e.g. the diagnostic circuit on th e body control module can easily distinguish between the two cases (normal load or load fault), because nearly no curren t is flowing into the led module during the fault scenario - the drivers consume a current of i s(fault,stu) ( pos. 6.3.6 ) or i s(dis,st) ( pos. 6.3.3 ). as soon as one led chain fails, the st -pin of this device is switched to v st(ol/sc) . the other devices used for the same light function can be connected toge ther via the st pins. this leads to a switch off of all devices connected together. application examples are shown in chapter 12 . i st(ol/sc) v st st output control fault no fault v st(ol/sc) i st(pd) fault no fault
data sheet 22 rev. 1.0, 2013-08-08 TLD1125EL st pin figure 18 switching times via st pin v st t t 20% 80% t on(st) i out 100% t off( st)
TLD1125EL d pin data sheet 23 rev. 1.0, 2013-08-08 9d pin the d pin is designed as a single function pin. figure 19 block diagram dis pin the d pin can be used to extend the open load detection filter time t ol by adding a small signal capacitor to the d pin as shown in figure 26 . the filter time t d , which is defined by the charging current i d ( pos. 10.3.10 ). the time is adjustable according to the following equation: (9) i d v d d output control t typ c d v dth () ? i d ------------------------- - =
data sheet 24 rev. 1.0, 2013-08-08 TLD1125EL load diagnosis 10 load diagnosis 10.1 open load an open load diagnosis feature is integrated in the tld112 5el driver ic. if there is an open load on the output, the output is turned off. the potential on the in_set pin rises up to v in_set(ol/sc) . this high voltage can be used as input signal for an c as shown in figure 13 . the open load status is not latc hed, as soon as the open load condition is no longer present, the output stage will be turned on aga in. an open load conditio n is detected, if the voltage drop over the output stage v ps is below the threshold according pos. 10.3.11 . the output is deactivated after a filter time t d , which is defined by the charging current i d pos. 10.3.10 . the time is adjustable by the capacitor connected to the d pin according the following equation: (10) figure 20 in_set behavior during open load condition with st pin connected to gnd t dtyp , c d v dth () ? i d ------------------------- - = t t d v out t v f v d( th) v s v d t v in_ set(ref ) v in_ set(ol ) v in_set open load occurs open load disappears v s ?v ps(ol) t in_set (reset)
TLD1125EL load diagnosis data sheet 25 rev. 1.0, 2013-08-08 figure 21 in_set and st behavior during open load condition (st unconnected) to provide a limp home functionality (reactivation in case of open load inste ad of complete deac tivation) the filter time t d can be used. if a pwm signal with a frequency higher than 1/ t d is applied to the v s line and en signal, the ol detection feature will not be activate d. the implementation of the d-pi n is shown in the following figure: figure 22 block diagram d pin t t d v out t v f v d( th) v s v d t v st(ol ) v st open load occurs open load disappears v s ?v ps(ol) t in_set (reset) t v in_ set(ref ) v in_set i d v d d output control
data sheet 26 rev. 1.0, 2013-08-08 TLD1125EL load diagnosis 10.2 short circuit to gnd detection the TLD1125EL has an integrated sc to gnd detection. if the output stage is turned on and the voltage at the output falls below v out(sc) the potential on the in_set pin is increased up to v in_set(ol/sc) after t sc if the st pin is connected to gnd. if the st is open or connected to gnd via a high ohmic re sistor the fault is indicated on the st pin according to chapter 8 after t d . more details are shown in figure 24 . this condition is not latched. for detecting a normal condition after a short circ uit detection an output current according to i out(sc) is driven by the channel. the filter time t d is defined by the charging current i d pos. 10.3.10 . the time is adjustable by the capacitor connected to the d pin according the following equation: (11) figure 23 in_set behavior during short circuit to gnd condition with st connected to gnd t dtyp , c d v dth () ? i d ------------------------- - = t t d v out t v f v d(th) v s v d t v in _se t( ref ) v in _set(ol ) v in _set short circuit occurs short circuit disappears v out ( s c) t in_set(reset)
TLD1125EL load diagnosis data sheet 27 rev. 1.0, 2013-08-08 figure 24 in_set and st behavior during short circuit to gnd condition (st unconnected) 10.3 electrical characteristics in _set pin and load diagnosis electrical characteristics in _set pin and load diagnosis unless otherwise specified: v s = 5.5 v to 40 v, t j = -40 c to +150 c, r set = 12 k , all voltages with respect to ground, positive current flowing into pin for input pins (i ), positive currents flowing out of the i/o and output pins (o) (unless otherwise specified) pos. parameter symbol limit values unit conditions min. typ. max. 10.3.1 in_set reference voltage v in_set(ref) 1.19 1.23 1.27 v 1) v out =3.6v t j = 25...115 c 10.3.2 in_set open load/short circuit voltage v in_set(ol/sc) 4? 5.5v 1) v s > 8 v t j = 25...150 c v s = v out (ol) or v outx = 0 v (sc) t t d v out t v d(th) v s v d t v st(ol ) v st t in_set(reset) t v in _se t( ref ) v in _set v f short circuit occurs short circuit disappears v out ( s c)
data sheet 28 rev. 1.0, 2013-08-08 TLD1125EL load diagnosis 10.3.3 in_set open load/short circuit current i in_set(ol/sc) 1.5 ? 7.4 ma 1) v s > 8 v t j = 25...150 c v in_set = 4 v v s = v out (ol) or v out = 0v (sc) 10.3.4 st device turn on threshold (active low) in case of voltage applied from external (st-pin acting as input) v st(l) 0.8 ? ? v ? 10.3.5 st device turn off threshold (active low) in case of voltage applied from external (st-pin acting as input) v st(h) ?? 2.5v? 10.3.6 st pull down current i st(pd) ?? 15a v en =5.5v v st =0.8v 10.3.7 st open load/short circuit voltage (st-pin acting as diagnosis output) v st(ol/sc) 4? 5.5v 1) v s > 8 v t j = 25...150 c r st = 470 k v s = v out (ol) or v out = 0v (sc) 10.3.8 st open load/short circuit current (st-pin acting as diagnosis output) i st(ol/sc) 100 ? 220 a 1) v s > 8 v t j = 25...150 c v st = 2.5 v v s = v out (ol) or v out = 0v (sc) 10.3.9 d high threshold v d(th) 2.45 2.85 3.2 v v s > 8 v 10.3.10 d output current i d 12 3a v s > 8 v v d = 2 v 10.3.11 ol detection voltage v ps(ol) = v s - v out v ps(ol) 0.2 ? 0.4 v v s >8v 10.3.12 short circuit to gnd detection threshold v out(sc) 0.8 ? 1.4 v v s >8v 10.3.13 in_set diagnosis reset time t in_set(reset) ?5 20s 1) v s > 8 v 10.3.14 sc detection current in case of unconnected st- pin i out(sc,stu) 100 200 300 a v s > 8 v v out = 0 v electrical characteristics in _set pin and load diagnosis (cont?d) unless otherwise specified: v s = 5.5 v to 40 v, t j = -40 c to +150 c, r set = 12 k , all voltages with respect to ground, positive current flowing into pin for input pins (i ), positive currents flowing out of the i/o and output pins (o) (unless otherwise specified) pos. parameter symbol limit values unit conditions min. typ. max.
TLD1125EL load diagnosis data sheet 29 rev. 1.0, 2013-08-08 10.3.15 sc detection current in case of st-pin shorted to gnd i out(sc,stg) 0.1 2 4.75 ma v s > 8 v v out = 0 v v st = 0 v 10.3.16 in_set activation current without turn on of output stage i in_set(act) 2 ? 15 a see figure 15 1) not subject to production test, specified by design electrical characteristics in _set pin and load diagnosis (cont?d) unless otherwise specified: v s = 5.5 v to 40 v, t j = -40 c to +150 c, r set = 12 k , all voltages with respect to ground, positive current flowing into pin for input pins (i ), positive currents flowing out of the i/o and output pins (o) (unless otherwise specified) pos. parameter symbol limit values unit conditions min. typ. max.
data sheet 30 rev. 1.0, 2013-08-08 TLD1125EL power stage 11 power stage the output stage is realized as high side current source with a current of 360 ma. during off state the leakage current at the output stage is minimized in order to prevent a slightly glowing led. the maximum current of the channel is limited by the power dissipation and used pcb cooling areas (which results in the applications r thja ). for an operating current control loop the supply and output voltages according to the following parameters have to be considered: ? required supply voltage for current control v s(cc) , pos. 6.3.10 ? voltage drop over output stage during current control v ps(cc) , pos. 11.2.6 ? required output voltage for current control v out(cc) , pos. 11.2.7 11.1 protection the device provides embedded protective functions, wh ich are designed to prevent ic destruction under fault conditions described in this data sheet. fault conditio ns are considered as ?outside? normal operating range. protective functions are neither designed fo r continuous nor for repetitive operation. 11.1.1 over load behavior an over load detection circuit is integrated in the basi c led driver ic. it is realized by a temperature monitoring of the output stage (out). as soon as the junction temperature exceed s the current reduction temperature threshold t j(crt) the output current will be reduced by the device by re ducing the in_set reference voltage v in_set(ref) . this feature avoids led?s flickering during static output overload conditions. furtherm ore, it protects leds against over temperature, which are mounted thermally cl ose to the device. if th e device temperatur e still increases, the ou tput current decreases close to 0 a. as soon as the device cools down the output current rises again. figure 25 output current reduction at high temperature note: this high temperature output current reduction is r ealized by reducing the in_set reference voltage voltage ( pos. 10.3.1 ). in case of very high power loss applied to the device and very high junction temperature the output current may drop down to i out = 0 ma, after a slight cooling down the current increases again. 11.1.2 reverse battery protection the TLD1125EL has an integrated reverse battery protection fe ature. this feature protects the driver ic itself, but also connected leds. the output reverse current is limited to i outx(rev) by the reverse battery protection. t j i out t j(crt) v in_set
TLD1125EL power stage data sheet 31 rev. 1.0, 2013-08-08 note: due to the reverse battery protection a reverse protection diode for the light module may be obsolete. in case of high iso-pulse requirements and only minor protec ting components like capacitors a reverse protection diode may be reasonable. the external protection circuit needs to be verified in the application. 11.2 electrical charact eristics power stage electrical characteristics power stage unless otherwise specified: v s = 5.5 v to 18 v, t j = -40 c to +150 c, v out = 3.6 v, all voltages with respect to ground, positive current flowing into pin for input pins (i ), positive currents flowing out of the i/o and output pins (o) (unless otherwise specified) pos. parameter symbol limit values unit conditions min. typ. max. 11.2.1 output leakage current i out(leak) ? ? ? ? 21 9 a v en = 5.5 v i in_set = 0 a v out =2.5v t j = 150 c 1) t j = 85 c 11.2.2 output leakage current in boost over battery setup -i out(leak,b2b) ??150a 1) v en = 5.5 v i in_set =0a v out = v s = 40 v 11.2.3 reverse output current -i out(rev) ??3a 1) v s = -16 v output load: led with break down voltage <-0.6v 11.2.4 output current accuracy limited temperature range k lt 2092 1800 2250 2250 2408 2700 1) t j = 25...115 c v s = 8...18 v v ps = 2 v r set = 12 k r set = 30 k 11.2.5 output current accuracy over temperature k all 1980 1710 2250 2250 2520 2790 1) t j = -40...115 c v s = 8...18 v v ps = 2 v r set = 6...12 k r set = 30 k 11.2.6 voltage drop over power stage during current control v ps(cc) = v s - v out v ps(cc) 0.75 ? ? v 1) v s = 13.5 v r set = 12 k i out 90% of ( k lt(typ) / r set ) 11.2.7 required output voltage for current control v out(cc) 2.3 ? ? v 1) v s = 13.5 v r set = 12 k i out 90% of ( k lt(typ) / r set ) 11.2.8 maximum output current i out(max) 360 ? ? ma r set = 4.7 k the maximum output current is limited by the thermal conditions. please refer to pos. 4.3.1 - pos. 4.3.3
data sheet 32 rev. 1.0, 2013-08-08 TLD1125EL power stage 11.2.9 pwmi turn on time t on(pwmi) ??15s 2) v s = 13.5 v r set = 12 k pwmi l i out = 80% of ( k lt(typ) / r set ) 11.2.10 pwmi turn off time t off(pwmi) ??10s 2) v s = 13.5 v r set = 12 k pwmi h i out = 20% of ( k lt(typ) / r set ) 11.2.11 st turn on time t on(st) ??15s 3) v s = 13.5 v r set = 12 k st l i out = 80% of ( k lt(typ) / r set ) 11.2.12 st turn off time t off(st) ??10s 3) v s = 13.5 v r set = 12 k st h i out = 20% of ( k lt(typ) / r set ) 11.2.13 in_set turn on time t on(in_set) ??15s v s = 13.5 v i in_set = 0 100 a i out = 80% of ( k lt(typ) / r set ) 11.2.14 in_set turn off time t off(in_set) ??10s v s = 13.5 v i in_set =100 0a i out = 20% of ( k lt(typ) / r set ) 11.2.15 vs turn on time t on(vs) ??20s 1) 4) v en =5.5v r set = 12 k v s = 0 13.5 v i out = 80% of ( k lt(typ) / r set ) 11.2.16 current reduction temperature threshold t j(crt) ?140?c 1) i out = 95% of ( k lt(typ) / r set ) 11.2.17 output current during current reduction at high temperature i out(crt) 85% of ( k lt(typ) / r set ) ??a 1) r set =12k t j = 150 c 1) not subject to production test, specified by design 2) see also figure 8 3) see also figure 18 4) see also figure 6 electrical characteristics power stage (cont?d) unless otherwise specified: v s = 5.5 v to 18 v, t j = -40 c to +150 c, v out = 3.6 v, all voltages with respect to ground, positive current flowing into pin for input pins (i ), positive currents flowing out of the i/o and output pins (o) (unless otherwise specified) pos. parameter symbol limit values unit conditions min. typ. max.
TLD1125EL application information data sheet 33 rev. 1.0, 2013-08-08 12 application information note: the following information is given as a hint for the implementation of the device only and shall not be regarded as a description or warranty of a certain functionality, condition or quality of the device. figure 26 application diagram note: this is a very simplified example of an application ci rcuit. in case of high iso- pulse requirements a reverse protection diode may be used for le d protection. the function must be ve rified in the real application. 12.1 further application information ? for further information you may contact http://www.infineon.com/ rear light assembly v bat bcm profet channel 1 internal power supply esd protection out2 channel 2 control and protection circuit equivalent to channel 1 in1 is1 sen gnd r gnd is2 in2 open load detection logic gate control & charge pump vbb out1 clamp for inductive load multi step load current limitation load current sense temperature sensor tail brake r set gnd output control out internal supply thermal protection current adjust basic led driver gnd en vs in_set d pwmi c d r pwmi c pwmi status st c mod =2.2f is o-p ulse protection circuit depending on requirements 10k c vs =4.7nf 4.7nf** eventually to other basic led driver 470k * * in case pwm via vs is performed . ** for emi improvement, if required. c st =100pf**
data sheet 34 rev. 1.0, 2013-08-08 TLD1125EL package outlines 13 package outlines figure 27 pg-ssop14 green product (rohs compliant) to meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. green products are rohs-compliant (i.e pb-free finish on leads and suitable for pb-free soldering according to ipc/jedec j-std-020). pg-ssop-14-1,-2,-3-po v02 1 7 14 8 14 17 8 14x 0.25 ?.05 2) m 0.15 d c a-b 0.65 c stand off 0 ... 0.1 (1.45) 1.7 max. 0.08 c a b 4.9 ?.1 1) a-b c 0.1 2x 1) does not include plastic or metal protrusion of 0.15 max. per side 2) does not include dambar protrusion bottom view ?.2 3 ?.2 2.65 0.2 ?.2 d 6 m d 8x 0.64 ?.25 3.9 ?.1 1) 0.35 x 45? 0.1 cd +0.06 0.19 8 ? max. index marking exposed diepad dimensions in mm for further information on alternativ e packages, please vi sit our website: http://www.infineon.com/packages .
TLD1125EL revision history data sheet 35 rev. 1.0, 2013-08-08 14 revision history revision date changes 1.0 2013-08-08 inital revision of data sheet
edition 2013-08-08 published by infineon technologies ag 81726 munich, germany ? 2013 infineon technologies ag all rights reserved. legal disclaimer the information given in this docu ment shall in no event be regarded as a guarantee of conditions or characteristics. with respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, infine on technologies hereby disclaims any and all warranties and liabilities of any kind, including with out limitation, warranties of non-infringement of inte llectual property rights of any third party. information for further information on technology, delivery terms and conditions and prices, please contact the nearest infineon technologies office ( www.infineon.com ). warnings due to technical requirements, components may contain dangerous substances. for information on the types in question, please contact the nearest infineon technologies office. infineon technologies compon ents may be used in life-su pport devices or systems only with the express written approval of infineon technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safe ty or effectiveness of that de vice or system. life support devices or systems are intended to be implanted in the hu man body or to support an d/or maintain and sustain and/or protect human life. if they fail, it is reasonable to assume that the health of the user or other persons may be endangered.

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