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power management & multimarket datasheet revision 2.0, 2012-04-12 BCR401W led driver
edition 2012-04-12 published by infineon technologies ag 81726 munich, germany ? 2012 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 witho ut limitation, warranties of non-infrin gement of intellectua l 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.
BCR401W datasheet 3 revision 2.0, 2012-04-12 trademarks of infineon technologies ag aurix?, c166?, canpak?, ci pos?, cipurse?, econopac k?, coolmos?, coolset?, corecontrol?, crossav e?, dave?, di-pol?, easypim?, econobridge?, econodual?, econopim?, econopack?, eicedriver?, eupec?, fcos?, hitfet?, hybridpack?, i2rf?, isoface?, isopack?, mipaq?, modstack?, my-d?, novalithic?, optimos?, origa?, powercode?; primarion?, pr imepack?, primestack?, pr o-sil?, profet?, rasic?, reversave?, satric?, si eget?, sindrion?, sipmos?, smartl ewis?, solid flash?, tempfet?, thinq!?, trenchstop?, tricore?. other trademarks advance design system? (ads) of agilent te chnologies, amba?, arm?, multi-ice?, keil?, primecell?, realview?, thumb?, vision? of arm limited, uk. autosar? is licensed by autosar development partnership. bluetooth? of bluetooth sig inc. cat-iq? of dect forum. colossus?, firstgps? of trimble navigation ltd. emv? of emvc o, llc (visa holdings in c.). epcos? of epcos ag. flexgo? of microsoft corp oration. flexray? is licensed by flexray consortium. hyperterminal? of hilgraeve incorporated. iec? of commission electrot echnique internationale. irda? of infrared data association corporation. iso? of international organization for standardization. matlab? of mathworks, inc. maxim? of maxim integrated products, inc. microtec?, nucleus? of mentor graphics corporation. mipi? of mipi allianc e, inc. mips? of mips technologies, inc., u sa. murata? of murata manufacturing co., microwave office? (mwo) of applied wave research inc., omnivision? of omnivision technologies, inc. openwave? openwave systems inc. red hat? red hat, inc. rfmd? rf micro devices, inc. sirius? of si rius satellite radio inc. solaris? of sun microsystems, inc. spansion? of spansion llc ltd. symbian? of symbian software limited. taiyo yuden? of taiyo yuden co. teaklite? of ceva, inc. tektro nix? of tektronix inc. toko? of toko kabushiki kaisha ta. unix? of x/open company limited. verilo g?, palladium? of cadence design systems, inc. vlynq? of texas instruments incorpor ated. vxworks?, wind river? of wind ri ver systems, inc. zetex? of diodes zetex limited. last trademarks update 2011-11-11 revision history page or item subjects (major changes since previous revision) revision 2.0, 2012-04-12 all datasheet layout updated table 2-1 v out limit increased table 2-3 r int limits tightened
BCR401W table of contents datasheet 4 revision 2.0, 2012-04-12 table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 list of figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 list of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1led driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.2 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3 general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 table of contents
BCR401W list of figures datasheet 5 revision 2.0, 2012-04-12 figure 1-1 pin configuration and typical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 figure 3-1 total power dissipation p tot = f(t s ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 figure 3-2 permissible pulse load r thjs = f(t p ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 figure 3-3 permissible pulse load p totmax / p totdc = f(t p ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 3-4 output current versus v s i out = f(v s ), 2 leds load with v f = 3.8v in series, r ext = parameter. . . . 12 figure 3-5 supply current versus v s i s = f(v s ), 2 leds load with v f = 3.8v in series. . . . . . . . . . . . . . . . . . . 12 figure 3-6 output current versus r ext i out = f(r ext ), v s = 10 v, v out = 7.6 v . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 3-7 output current versus v drop i out = f(v drop ), v s = 10 v, v out = 7.6 v. . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 4-1 application circuit: stand alone current source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 4-2 application circuit: supply voltages > 18 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 5-1 package outline for sot343 (dimensi ons in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 5-2 package footprint for sot343 (dimensions in mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 5-3 tape and reel information for sot343 (dimensions in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 list of figures
BCR401W list of tables datasheet 6 revision 2.0, 2012-04-12 table 2-1 maximum ratings at t a = 25 c, unless otherwise specified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 2-2 thermal resistance at t a = 25 c, unless otherwise specified. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 2-3 electrical characteristics at t a = 25 c, unless otherwise specified . . . . . . . . . . . . . . . . . . . . . . . . 9 table 2-4 dc characteristics with stabilized led load at t a = 25 c, unless otherwise specified . . . . . . . . . 9 list of tables
BCR401W led driver datasheet 7 revision 2.0, 2012-04-12 1 led driver 1.1 features 1.2 applications ? channel letters for advertising, led strips for decorative lighting ? aircraft, train, ship illumination ? retrofits for general lighting, white goods like refrigerator lighting ? medical lighting ? automotive applications like chm sl and rear combination lights 1.3 general description the BCR401W is a cost efficient led driver to drive low power leds. the advantages towards resistor biasing are: ? homogenous light output despite of varyin g forward voltages in different led strings ? homogenous light output of leds despite of voltage drop across long supply lines ? homogenous light output independent from supply voltage variations ? longer lifetime of the leds due to reduced output current at higher temperatures (negative thermal coefficient) the advantages towards discrete solutions are: ? lower assembly cost ? smaller form factor ? higher reliability due to less soldering joints ? higher output current accuracy due to pretested led drivers dimming is possible by using an external digital transistor at the ground pin. the BCR401W can be operated at higher supply voltages adding leds between the supply voltage v s and the power supply pin of the led driver. you can fi nd further details in our application notes. ? led drive current preset to 10 ma ? output current adjustable up to 60 ma with an external resistor ? easy paralleling of drivers to increase current ? supply voltage up to 18 v ? high current accuracy at supply voltage variation ? low voltage overhead of 1.2 v ? up to 500 mw power dissipation in a small sot343 package ? negative thermal coefficient of -0.3 %/k reduces output current at higher temperatures ? rohs compliant (pb-free) package ? automotive qualified according aec q101 sot343-3d
BCR401W led driver datasheet 8 revision 2.0, 2012-04-12 the BCR401W is a perfect fit for numerous low power le d applications by combinin g small form factor with low cost. these led drivers offer several advantages to resistors like signif icantly higher current control at very low voltage drop ensuring high lifetime of the leds. figure 1-1 pin configuration and typical application type marking pin configuration package BCR401W w5s 1 = gnd 2 = i out 3=v s 4=r ext sot343 pin configuration typical application gnd i out v s r ext 1 2 3 4 gnd i out +v s v drop 2 1 i out i s r ext v s 4 3 r ext (optional )
BCR401W electrical characteristics datasheet 9 revision 2.0, 2012-04-12 2 electrical characteristics attention: stresses above the max. values listed here may cause permanent damage to the device. exposure to absolute maximum rating conditions for extended periods may affect device reliability. maximum ratings are absolute ratings; exceeding only one of these values may cause irreversible damage to the integrated circuit. table 2-1 maximum ratings at t a = 25 c, unless otherwise specified parameter symbol values unit note / test condition min. typ. max. supply voltage v s --18v output current i out --60ma output voltage v out --18v reverse voltage between all terminals v r --0.5v total power dissipation p tot --500mw t s 95 c junction temperature t j --150c storage temperature range t stg -65 - 150 c table 2-2 thermal resistance at t a = 25 c, unless otherwise specified parameter symbol values unit note / test condition min. typ. max. junction - soldering point 1) 1) for calculation of r thja please refer to application note an077 (thermal resistance calculation) r thjs --110k/w table 2-3 electrical characteristics at t a = 25 c, unless otherwise specified parameter symbol values unit note / test condition min. typ. max. collector-emitter breakdown voltage v br(ceo) 18 - - v i c =100a, i b =0 supply current i s 350 440 540 a v s =10v dc current gain h fe - 150 - - i c =50ma, v ce =1v internal resistor r int 68 79 90 ? i rint =10ma output current i out 91011ma v s =10v v out =7.6v voltage drop ( v rext ) v drop -0.79-v i out =10ma table 2-4 dc characteristics with stabilized led load at t a = 25 c, unless otherwise specified parameter symbol values unit note / test condition min. typ. max. lowest sufficient supply voltage overhead v smin -1.2-v i out >8ma output current change versus t a ? i out / i out --0.3-%/k v s =10v output current change versus v s ? i out / i out -2-%/v v s =10v
BCR401W typical characteristics datasheet 10 revision 2.0, 2012-04-12 3 typical characteristics figure 3-1 total power dissipation p tot = f ( t s ) figure 3-2 permissible pulse load r thjs = f ( t p ) 0 100 200 300 400 500 600 0 20 40 60 80 100 120 140 p tot [mw] t s [ c] 1 10 100 10 -6 10 -5 10 -4 10 -3 10 -2 10 -1 10 0 r thjs [k/w] t p [s] d = 0 d = 0.005 d = 0.01 d = 0.02 d = 0.05 d = 0.1 d = 0.2 d = 0.5
BCR401W typical characteristics datasheet 11 revision 2.0, 2012-04-12 figure 3-3 permissible pulse load p totmax / p totdc = f ( t p ) 1 10 100 10 -6 10 -5 10 -4 10 -3 10 -2 10 -1 10 0 p totmax / p totdc t p [s] d = 0 d = 0.005 d = 0.01 d = 0.02 d = 0.05 d = 0.1 d = 0.2 d = 0.5
BCR401W typical characteristics datasheet 12 revision 2.0, 2012-04-12 figure 3-4 output current versus v s i out = f ( v s ), 2 leds load with v f = 3.8v in series, r ext = parameter figure 3-5 supply current versus v s i s = f ( v s ), 2 leds load with v f = 3.8v in series 1 10 100 0 2 4 6 8 10 12 14 16 18 i out [ma] v s [v] r ext = open r ext = 160 r ext = 82 r ext = 36 10 -5 10 -4 10 -3 0 2 4 6 8 10 12 14 16 18 i s [a] v s [v]
BCR401W typical characteristics datasheet 13 revision 2.0, 2012-04-12 figure 3-6 output current versus r ext i out = f ( r ext ), v s = 10 v, v out = 7.6 v figure 3-7 output current versus v drop i out = f ( v drop ), v s = 10 v, v out = 7.6 v 0 10 20 30 40 50 60 10 100 1000 i out [ma] r ext [ ] 10 -5 10 -4 10 -3 10 -2 10 -1 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 i out [a] v drop [v]
BCR401W application hints datasheet 14 revision 2.0, 2012-04-12 4 application hints figure 4-1 application circuit: stand alone current source figure 4-2 application circuit: supply voltages > 18 v application hints BCR401W serves as an easy to use constant current s ource for leds. in stand alone application an external resistor r ext can be connected to adjust the current between 10 ma and 60 ma. r ext can be determined by using figure 3-6 . connecting a low tolerance resistor r ext will improve the overall accu racy of the current sense resistance formed by the parallel connection of r int and r ext leading to an improved current accuracy. please take into account that the result ing output currents will be slightly lower du e to the self heatin g of the component and the negative thermal coefficient. please visit our web site www.infineon.com/lowcostleddriver for detailed application notes. gnd i out +v s v drop 2 1 i out i s r ext v s 4 3 r ext (optional ) gnd i out +v s v drop 2 1 i s + i out i s r ext v s 4 3 r ext (optional ) i out
BCR401W package datasheet 15 revision 2.0, 2012-04-12 5 package figure 5-1 package outline for sot343 (dimensions in mm) figure 5-2 package footprint for sot343 (dimensions in mm) figure 5-3 tape and reel information for sot343 (dimensions in mm) sot343-po v08 1.25 0.1 0.1 max. 2.1 0.1 0.15 +0.1 -0.05 0.3 +0.1 2 0.2 0.1 0.9 3 2 4 1 a +0.1 0.6 a m 0.2 1.3 -0.05 -0.05 0.15 0.1 m 4x 0.1 0.1 min. 0.6 sot343-fp v08 0.8 1.6 1.15 0.9 sot323-tp v02 0.2 4 2.15 8 2.3 1.1 pin 1
BCR401W terminology datasheet 16 revision 2.0, 2012-04-12 terminology ? i out / i out output current change h fe dc current gain i en enable current i led led current i out output current i r reverse current led light emitting diode pcb printed circuit board p tot total power dissipation pwm pulse width modulation r b bias resistor r ext external resistor r int internal resistor rohs restriction of hazardous substance directive r thjs thermal resistance junction to soldering point t a ambient temperature t j junction temperature t s soldering point temperature t stg storage temperature v br(ceo) collector-emitter breakdown voltage v br breakdown voltage v drop voltage drop v out output voltage v r reverse voltage v s supply voltage v smin lowest sufficient supp ly voltage overhead
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