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type package tle 4241 gm pg-dso-8-16 led driver with adjustable current tle 4241 gm p-dso-8-3, -6, -7, -8, -9 data sheet 1 rev. 1.3, 2007-03-19 features ? adjustable const ant output current wide input voltage range low drop voltage open load detection overtemperature protection short circuit proof reverse polarity proof wide temperature range: -40 c < t j < 150 c very small smd-package green product (rohs compliant) aec qualified functional description the tle 4241 gm is an integrated adjustable consta nt current source. it provides an output current adjustable vi a different means (set, pwm, reference resistor) which is kept nearly independen t from load and supply voltage changes. the ic is designed to supply leds under the severe conditions of automotive applications resulting in constant brightness and extended led lifetime. it is provided in the very small pg-dso-8-16 (micro 8) package. protection circuits prevent damage to the device in case of overload, short circuit, reverse polarit y and overtemperature. the co nnected leds are protected against reverse polarity as well as excess voltages up to 45 v. a status output allows handling of open load and short circuit at the main output. a pwm input offers the possibility to ad just the led brightness by pulse width modulation. with an implemented hi gh/low current switch the output current leve l can be reduced e.g. for brake/tail light application. the implemented features such as adjustable output current, the hi gh/low current switch and the provided pwm input make the device we ll suited for a broa d range of led and other applications.
data sheet 2 rev. 1.3, 2007-03-19 tle 4241 gm circuit description figure 1 block diagram an internal reference voltage of typ. 1.20 v supplies the ref pin which is connected to gnd via an external resistor. in the set = h mode the reference cu rrent flowing on the ref pin is mirrored with an amplification to form the desired ou tput current. the typ. output current in the set = h mode calculates: (1) the output current is show n as a function of the reference resistance on page 10 for the high as well as for the low current mode. with the pwm input the led brightness can be re gulated via duty cycl e. also pwm = l sets the tle 4241 in sleep mo de resulting in a very low cu rrent consumption of << 1 a typ. due to the high impedance of the pwm input (see timing diagram i pwm versus v pwm on page 12 ) the pwm pin can thus also be used as an enable input. aeb03003 regulation high regulation low reference voltage status control v/i converter q ref set pwm st i gnd i qtyp , /ma 1.20 r ref /k ? ---------------------- 487 0.1 + =
tle 4241 gm data sheet 3 rev. 1.3, 2007-03-19 figure 2 pin configuration (top view) table 1 pin definitions and functions pin no. symbol function 1gnd ground; internally connected to pin 5 2st status output; open collector output, connect to external pull-up resistor (10 k ? or higher) 3pwm pulse width modulation input; if not need ed connect to v i 4 set high/low current input; choice of current level 5gnd ground; internally connected to pin 1 6ref reference input; connect to gnd via an external resistor to adjust the output current 7q output 8i input; block to gnd directly at the ic with a 100 nf ceramic capacitor aep03002 8 1 gnd i st 2 7 pwm 3 6 set 4 5 q ref gnd
data sheet 4 rev. 1.3, 2007-03-19 tle 4241 gm application information figure 3 application circuit figure 3 shows a typical application with the tle 4241 gm led driver. the 3 leds are driven with an adequate supply current adjusted by the resistor r ref . thus brightness variations due to forward vo ltage spread of the leds ar e prevented. the luminosity spread arising from the led production process can be compensated via software by an appropriate duty cycle applied to the pwm pin. hence select ion of the leds to forward voltage as well as to lumino sity classes can be sp ared. the slightly negative temperature coefficient of the tle 4241 gm output cu rrent protects the leds against over- temperature stress if the ic is placed nearby the leds. the voltage drop ( v i - v q ) across the tle 4241 gm is moni tored in order to detect an open load condition indicated at the status output pin st. in case of open load, the voltage drop will decrea se below the lower stat us switching threshold v dr,l . hence, the status output st will be driv en low. in normal operation, the voltage drop is above the upper status threshold v dr,h , thus the open collector output st is in high-ohmic state (see also section status output at the electrical characteristics). the function of st, set and pwm as well as their timings are shown in figure 4 . aed03098 tle 4241g ref r c set pwm st tle 4271 wd r q v i q batt v la e67b osram w ro 22 f 100 nf 10 k ?
tle 4241 gm data sheet 5 rev. 1.3, 2007-03-19 figure 4 function an d timing diagram open load aet03339.vsd v i t v pwm v pwm, h t v pwm, l v set v set, h t v set, l 47 10 ma i q t v st t v stl t set, h t set, l t pwm, on t pwm, off
data sheet 6 rev. 1.3, 2007-03-19 tle 4241 gm note: maximum ratings are absolute ratings; exceeding any one of these values may cause irreversible damage to the integrated circuit. table 2 absolute maximum ratings -40 c < t j < 150 c parameter symbol limit values unit remarks min. max. input voltage v i -42 45 v ? current i i ? ? ma internally limited output voltage v q -1 40 v ? current i q ? ? ma internally limited status output voltage v st -0.3 40 v ? current i st ? 5 5 ma internally limited reference input voltage v ref -0.3 7 v ? current i ref -2 2 ma ? pulse width modulation input voltage v pwm -40 40 v ? current ? -1 1 ma ? high/low curr ent input voltage v set -40 40 v ? current i set -1 1 ma ? temperatures junction temperature t j -40 150 c? storage temperature t stg -50 150 c? thermal resistances junction ambient r thja ?105k/w 1) 1) worst case regarding peak temperature; mounted on pcb 80 80 1.5 mm 3 , 35 m cu, 300 mm 2 heat sink area.
tle 4241 gm data sheet 7 rev. 1.3, 2007-03-19 table 3 operating range parameter symbol limit values unit remarks min. max. input voltage v i 445v? status output voltage v st ?16v? set voltage v set 040v? pwm voltage v pwm 040v? junction temperature t j -40 150 c? reference resistor r ref 7 100 k ? set = h 4.7 18 k ? set = l
data sheet 8 rev. 1.3, 2007-03-19 tle 4241 gm table 4 electrical characteristics 9v v i 16 v; r ref = 10 k ? ; v pwm v pwm,h ; -40 c < t j < 150 c; all voltages with respect to ground; positive cu rrent defined flowing into pi n; unless otherwise specified parameter symbol limit va lues unit test condition min. typ. max. current consumption off mode i qoff ?0.12 apwm = l, t j < 85 c; v i 13.5 v current consumption i ql ? 5 10 ma set = l; v q = 6 v current consumption i qh ? 6 10 ma set = h; v q = 6 v current consumption open load i ql,o ? ? 10 ma set = l; v q open current consumption open load i qh,o ? ? 10 ma set = h; v q open output output current i q 6.7 8.4 10 ma set = l, v q = 6 v ?8.6?maset = l, v q = 4 v output current i q 47 58.5 70 ma set = h, v q = 6 v ? 60.0 ? ma set = h, v q = 4 v current ratio i qh / i ql 678?? output current limit i qmax ? 83 ? ma set = l; r ref = 0 ? output current limit i qmax ? 83 ? ma set = h; r ref = 0 ? drop voltage v dr ? 0.2 0.5 v set = l; i q = 80% of i q,nom,l drop voltage v dr ? 0.3 0.5 v set = h; i q = 80% of i q,nom,h pwm input pwm high level v pwm,h 2.0 ? ? v ? pwm low level v pwm,l ??0.5v? pwm input current high level i pwm,h ? 220 500 a v pwm = 5.0 v pwm input current low level i pwm,l -10 ? 10 a v pwm = 0.0 v turn on delay time t pwm,on 0530 s 20%/80% i q , see figure 4
tle 4241 gm data sheet 9 rev. 1.3, 2007-03-19 turn off delay time t pwm,off 01030 s 20%/80% i q , see figure 4 set input set high level v set,h 2.0 ? ? v ? set low level v set,l ??0.5v? set input current high level i set,h ? 220 500 a v set = 5.0 v set input current low level i set,l -10 ? 10 a v set = 0.0 v delay time l -> h t set,h ??30 s 20%/80% i q , see figure 4 delay time h -> l t set,l ??30 s 20%/80% i q , see figure 4 status output lower status switching threshold v dr,l 0.15 ? ? v ( v i - v q ) decreasing set = l 0.15 ? ? v ( v i - v q ) decreasing set = h upper status switching threshold v dr,h ??0.7v( v i - v q ) increasing set = l ??0.7v( v i - v q ) increasing set = h status low voltage v stl ??0.4v( v i - v q ) < v dr,l i st = 1.0 ma leakage current i stlk ??10 a( v i - v q ) > v dr,h v st = 5.0 v table 4 electrical characteristics (cont?d) 9v v i 16 v; r ref = 10 k ? ; v pwm v pwm,h ; -40 c < t j < 150 c; all voltages with respect to ground; positive cu rrent defined flowing into pi n; unless otherwise specified parameter symbol limit va lues unit test condition min. typ. max.
data sheet 10 rev. 1.3, 2007-03-19 tle 4241 gm typical performance characteristics output current versus external resistor, set = h output current versus supply voltage, set = h output current versus external resistor, set = l output current versus supply voltage, set = l aed03333.vsd 5 r ref i q 0 10 20 30 40 50 60 70 80 100 10 20 50 100 k ? ma set = h v q = 6 v aed03335.vsd 0 v i v 0 10 30 50 70 20 40 60 80 100 5 1015202530 40 v q = 6 v r ref = 10 k ? set = h ma i q aed03334.vsd 5 r ref i q 0 2 4 6 8 10 12 14 16 20 10 20 50 100 k ? ma set = l v q = 6 v aed03336.vsd 0 v i v 0 2 6 10 14 4 8 12 16 20 5 1015202530 40 v q = 6 v r ref = 10 k ? set = l ma i q
data sheet 11 rev. 1.3, 2007-03-19 tle 4241 gm reference voltage versus junction temperature aed03340.vsd -40 t j 0 40 80 c 160 1.15 1.19 1.21 1.23 1.25 1.17 v v ref r ref = 10 k ?
data sheet 12 rev. 1.3, 2007-03-19 tle 4241 gm pwm pin input current versus pwm voltage set pin input current versus set voltage pwm pin input current versus pwm voltage set pin input current versus set voltage aed03332.vsd 0 v pwm 5 1015202530 v40 0 0.5 1.0 1.5 2.0 ma i pwm aed03338.vsd 0 v set v 0 0.5 1.0 1.5 2.0 2.5 5 1015202530 40 ma i set aed03331.vsd 0 v pwm 123456 v8 0 100 200 300 400 a i pwm aed03337.vsd 0 v set 123456 v8 0 100 200 300 400 a i set
tle 4241 gm data sheet 13 rev. 1.3, 2007-03-19 package outlines figure 5 pg-dso-8-16 (plastic dual small outline) green product (rohs compliant) to meet the world-wi de customer requirements for envi ronmentally friendly products and to be compliant with government regula tions the device is available as a green product. green products are ro hs-compliant (i.e pb-free fi nish on leads and suitable for pb-free soldering according to ipc/jedec j-std-020). 1) does not include plastic or metal protrusion of 0.15 max. per side -0.06 -0.2 +0.1 5 0.41 8x 1 1) 4 8 1.27 5 a 0.1 0.2 m a (1.45) 0.175 1.75 max. b b 6 0.2 0.64 4 -0.2 0.19 +0.06 0.35 x 45 1) 0.25 max. 8 index marking 0.07 2) lead width can be 0.61 max. in dambar area gps01229 you can find all of our packages, sorts of packing and others in our infineon internet page ?products?: http://www.infineon.com/products . dimensions in mm smd = surface mounted device
tle 4241 gm revision history data sheet 14 rev. 1.3, 2007-03-19 version date changes rev. 1.2 2004-04-13 page 4, 9: improved i ndication and explan ation of the open load detection function. rev. 1.3 2007-03-19 initial version of rohs-compliant derivate of tle 4241 gm page 1 : aec certified statement added page 1 and page 13 : rohs compliance statement and green product feature added page 1 and page 13 : package changed to rohs compliant version legal disclaimer updated
edition 2007-03-19 published by infineon technologies ag 81726 munich, germany ? 2007 infineon technologies ag all rights reserved. legal disclaimer the information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. with respect to any examples or hints given herein, any typical valu es stated herein and/or any information regarding the application of the device, infineon technologies her eby disclaims any and all warranties and liabilities of any kind, including wi thout limitation, warranties of non-infrin gement of intellectual property rights of any third party. information for further information on technology, delivery terms an d 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 near est infineon technologies office. infineon technologies components may be used in life-supp ort 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 device or system. life support devices or systems are intended to be implanted in the hu man body or to support and/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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