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ams datasheet page 1 [v1-06] 2015-apr-07 document feedback as1111 lowCdropout led drivers the as1111a/as1111b/as1111c are led drivers designed to match current source bias for any color led, including white and blue. the devices can drive up to 4 high-current leds, and the led current is programmable using an external resistor (rset). the as1111a led currents are 460 x i set (per led, typ) at an led cathode voltage (v sat ) of 150mv and 650 x i set (typ) at a v sat of 1v, where i set is the current through rset connected to pin ctrl. the as1111b & as1111c led currents are 230 x i set (per led, typ) at a v sat of 150mv and 325 x i set (typ) at a v sat of 1v. all as1111 versions incorporat e a chip-enable feature via pin en. when the devices are disabled, the supply current drops down to less than 1 a. the as1111a and as1111b are available in a 6-pin wl-csp package with 0.4mm pitch. the as1111c is available in an 8-pin mlpd (2 x2mm) package with 0.5mm pitch. ordering information and content guide appear at end of datasheet. key benefits & features the benefits and features of as1111, lowCdropout led drivers are listed below: figure 1: added value of using as1111 benefits features high efficient ? ultra low voltage drop: less than 150mv supports a variety of end applications ? analog and pwm brightness control ? up to 80ma per led (as1111a) ? up to 40ma per led (as1111b, as1111c) extended battery life ? active-low shutdown mode ? low shutdown current: less than 1 a suitable for emf sensitive environment ? no electromagnetic interference ? no switching noise small pcb area ? less external components needed cost effective, small package ? 6-pin wl-csp with 0.4mm pitch ? 8-pin mlpd (2x2mm) with 0.5mm pitch general description
page 2 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? general description applications the as1111 devices are ideal for led displays and keyboard backlights, as well as lighting management units for battery powered audio devices such as ? mp3 and cd players, ? mobile and cordless phones, ?pdas, ? portable dvd players, and ? consumer electronics. application diagram the typical application diagram of this device for reference is shown below: figure 2: as1111 typical application diagram en ctrl gnd on off v in as1111a i1/i2 i3/i4 v set 3.0v r set v sat en ctrl gnd on off v in as1111b i1 i3 v set 3.0v r set v sat i2 en ctrl gnd on off v in as1111c i1 i3 v set 3.0v r set v sat i2 i4
ams datasheet page 3 [v1-06] 2015-apr-07 document feedback as1111 ? pin assignment figure 3: pin assignment of as1111a/b and as1111c pin assignment: shows the top through view pin assignment of the as1111a/b and as1111c. pin description figure 4: pin description of as1111 pin number pin name description as1111a as1111b as1111c a2 a2 4 gnd ground . connect to gnd b2 - - gnd ground . connect to gnd (as1111a) b3 b3 7 ctrl control . sets the led current; connect to external resistor rset b1 b1 1 en enable . device enable/pwm input. 1 = normal operation 0 = shutdown -a3 5i1 input1 . connect to cathode of led1 (as1111b&c) -b2 6i2 input2 . connect to cathode of led2 (as1111b&c) -a1 2i3 input3 . connect to cathode of led3 (as1111b&c) pin assignment 1 2 3 4 as1111c mlpd 8-pin 2x2mm exposed pad: gnd 9 8 7 6 5
page 4 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? pin assignment pin description: shows the pin number, name and description of every pin. a3 - - i1/i2 input1/2 . connect to cathode of led1 (as1111a) a1 - - i3/i4 input3/4 . connect to cathode of led2 (as1111a) -- 3i4 input4 . connect to cathode of led4 (as1111c) 8nc not connected . (as1111c) -- 9 exposed pad . connect this pad to the gnd plane on the pcb to maximize power dissipation (as1111c) pin number pin name description as1111a as1111b as1111c
ams datasheet page 5 [v1-06] 2015-apr-07 document feedback as1111 ? absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only. functional operation of the device at these or any other conditions beyond those indicated under electrical characteristics is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. figure 5: absolute maximum ratings note(s) and/or footnote(s): 1. junction-to-ambient thermal resistance is very dependent on application and board-layout. in situations where high maximum power dissipation exists, special attention must be paid to thermal dissipation during board design. 2. the reflow peak soldering temperature (body temperature) is specified according to ipc/je dec j-std-020 moisture/reflow sensitivity classification for non-hermet ic solid state surface mount devices. symbol parameter min max units comments electrical parameters supply voltage to ground 5v pins -0.3 5.0 v applicable for pins: i1, i2, i3, i4, i1/i 2, i3/i4, ctrl, en input current (latch-up immunity) -100 100 ma norm: jedec jesd78 electrostatic discharge esd hbm electrostatic discharge hbm 2 kv norm: jedec jesd22-a114f temperature ranges and storage conditions t a operating temperature -40 85 c r thja (1) junction to ambient thermal resistance 60 c/w mlpd 95 c/w wl-csp t j junction temperature 125 c wl-csp t strg storage temperature range -55 125 c t body package body temperature 260 c norm: ipc/jedec j-std-020 (2) rh nc relative humidity non-condensing 585 % msl moisture sensitivity level (wl-csp & mlpd) 1 represents an unlimited floor life time absolute maximum ratings
page 6 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? electrical characteristics all limits are guaranteed. the parameters with min and max values are guaranteed with production tests or sqc (statistical quality control) methods. figure 6: electrical characteristics electrical characteristics: shows the electrical characteristics of the led driver. t amb = C40 to 85c (unless otherwise specified) note(s) and/or footnote(s): 1. efficiency = (v in C v sat )/v in . guaranteed by design. symbol parameter note min typ max unit v sat cathode voltage at pins i1, i2, i3, i4, i1/i2, i3/i4 0.15 0.6 3.6 v v en_high enable voltage high pin en 2.2 3.6 v v en_low enable voltage low pin en 0 0.5 v i set i set range v en = 3v 25 150 a i set_off i set in off mode v ctrl = 3v, v sat = 3v, v en = 0v 0.1 1 a i in_off i in in off mode v ctrl = 3v, v sat = 3v, v en = 0v, t amb = 25c 0.1 1 a v ctrl = 3v, v sat = 3v, v en = 0v, t amb = -40c to 85c (for as1111a) 4 a v ctrl = 3v, v sat = 3v, v en = 0v, t amb = -40c to 85c 2 a eff (1) peak efficiency v in = 3v, v en = 3v 95 % match led to led current matching v en = 3v -3 3 % electrical characteristics
ams datasheet page 7 [v1-06] 2015-apr-07 document feedback as1111 ? electrical characteristics figure 7: output current multiplication ratio output current multiplication ratio: shows the ocmr of the led driver for setting of i set and different cathode voltages v sat . t amb = C40 to 85c (unless otherwise specified) as1111a i set = 25 a, v sat = 150mv, v en = 3v 350 500 650 i set = 40 a, v sat = 150mv, v en = 3v 335 480 625 i set = 75 a, v sat = 150mv, v en = 3v 295 420 545 i set = 25 a, v sat = 600mv, v en = 3v 435 620 805 i set = 40 a, v sat = 600mv, v en = 3v 425 610 795 i set = 75 a, v sat = 600mv, v en = 3v 415 590 765 i set = 25 a, v sat = 1v, v en = 3v 470 670 870 i set = 40 a, v sat = 1v, v en = 3v 460 660 860 i set = 75 a, v sat = 1v, v en = 3v 440 630 820 as1111b as1111c i set = 25 a, v sat = 150mv, v en = 3v 175 250 325 i set = 40 a, v sat = 150mv, v en = 3v 170 240 310 i set = 75 a, v sat = 150mv, v en = 3v 145 210 275 i set = 25 a, v sat = 600mv, v en = 3v 220 310 405 i set = 40 a, v sat = 600mv, v en = 3v 215 305 395 i set = 75 a, v sat = 600mv, v en = 3v 205 295 385 i set = 25 a, v sat = 1v, v en = 3v 235 335 435 i set = 40 a, v sat = 1v, v en = 3v 230 330 430 i set = 75 a, v sat = 1v, v en = 3v 220 315 410
page 8 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? typical operating characteristics figure 8: set current vs. ctrl voltage figure 9: set current vs. set voltage, r set = 30k typical operating characteristics
ams datasheet page 9 [v1-06] 2015-apr-07 document feedback as1111 ? typical operating characteristics figure 10: led current vs. sat voltage figure 11: ocmr vs. set current 0 100 200 300 400 500 600 700 0 20 40 60 80 100 120 140 160 ocmr i set (a) as1111a 0 50 100 150 200 250 300 350 0 20 40 60 80 100 120 140 160 ocmr i set (a) as1111b as1111c
page 10 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? typical operating characteristics figure 12: led current vs. set resistor, vset = 3v figure 13: led current vs. set resistor, vset = 3v
ams datasheet page 11 [v1-06] 2015-apr-07 document feedback as1111 ? typical operating characteristics figure 14: led current vs. temperature, vled = -0.25v, i set = 50 a figure 15: led current vs. set current
page 12 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? typical operating characteristics figure 16: v set voltage transient response figure 17: v en voltage transient response 20ma/div 1v/div 1us/div 1v/div 20ma/div 1us/div
ams datasheet page 13 [v1-06] 2015-apr-07 document feedback as1111 ? detailed description setting of the led current the current going into the leds is approximately ocmr times greater than the current i set . the led current is controlled by v set and r set according to the formula: for v set = 3v and a specific led current, the value of r set can be determined using the graphs shown in figure 12 and figure 13 . for any other option, the value of i set can be determined using the graph in figure 8 . led brightness can also be adju sted by driving pin en or pin ctrl with a pwm signal. detailed description (eq1) i led ocmr v set v ctrl ? r set ------------------------------------ - ? =
page 14 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? package drawings & markings figure 18: mlpd-8 2x2mm 0.5mm pitch package drawing note(s) and/or footnote(s): 1. dimensioning and tolerancin g conform to asme y14.5m-1994. 2. all dimensions are in millimeters. angles are in degrees. 3. coplanarity applies to the exposed heat slug as well as the terminal. 4. radius on terminal is optional. 5. n is the total number of terminals. package drawings & markings ref min nom max a 0.51 0.55 0.60 a1 0.00 0.02 0.05 a3 0.15 ref l 0.225 0.325 0.425 b 0.18 0.25 0.30 d2.00 bsc e2.00 bsc e0.50 bsc d2 1.45 1.60 1.70 e2 0.75 0.90 1.00 aaa - 0.15 - bbb - 0.10 - ccc 0.10 - ddd - 0.05 - eee - 0.08 - fff - 0.10 - n8 green rohs
ams datasheet page 15 [v1-06] 2015-apr-07 document feedback as1111 ? package drawings & markings figure 19: wl-csp-6 0.4mm pitch package drawing note(s) and/or footnote(s): 1. pin1 = a1 2. ccc coplanarity 3. all dimensions are in m green rohs
page 16 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? package drawings & markings figure 20: as1111a & as1111b package marking figure 21: as1111c package marking figure 22: as1111 package code yy xxxx aar xxx marking for wl-csp tracecode for wl-csp marking for mlpd tracecode for mlpd xxxx yy xxxx wl-csp aar xxx mlpd package
ams datasheet page 17 [v1-06] 2015-apr-07 document feedback as1111 ? ordering & contact information figure 23: ordering information buy our products or get free samples online at: www.ams.com/icdirect technical support is available at: www.ams.com/technical-support provide feedback about this document at: www.ams.com/document-feedback for further information and requests, e-mail us at: ams_sales@ams.com for sales offices, distributors and representatives, please visit: www.ams.com/contact headquarters ams ag tobelbaderstrasse 30 8141 unterpremstaetten austria, europe tel: +43 (0) 3136 500 0 website: www.ams.com ordering code marking description delivery form package AS1111A-BWLT cy dual led driver with enable and 80ma led current per channel tape & reel 6-pin wl-csp 0.4mm pitch as1111b-bwlt cz triple led driver with enable and 40ma led current per channel tape & reel 6-pin wl-csp 0.4mm pitch as1111c-bdft aar quad led driver with enable and 40ma led current per channel tape & reel mlpd-8lead (2mm x 2mm) ordering & contact information
page 18 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? rohs compliant & ams green statement rohs: the term rohs compliant means that ams ag products fully comply with current rohs directives. our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, rohs compliant products are suitable for use in specif ied lead-free processes. ams green (rohs compliant and no sb/br): ams green defines that in addition to rohs compliance, our products are free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material). important information: the information provided in this statement represents ams ag knowledge and belief as of the date that it is provided. ams ag bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are unde rway to better integrate information from third parties. ams ag has taken and continues to take reasonable steps to prov ide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams ag and ams ag suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. rohs compliant & ams green statement
ams datasheet page 19 [v1-06] 2015-apr-07 document feedback as1111 ? copyrights & disclaimer copyright ams ag, tobelbader strasse 30, 8141 unterpremstaetten, austria-europe. trademarks registered. all rights reserved. the material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. devices sold by ams ag are covered by the warranty and patent indemnification provisions appe aring in its general terms of trade. ams ag makes no warranty, express, statutory, implied, or by description regarding th e information set forth herein. ams ag reserves the right to ch ange specifications and prices at any time and without notice. therefore, prior to designing this product into a system, it is necessary to check with ams ag for current information. this product is intended for use in commercial applications. applications requiring extended temperature range, unusual environmental requirements, or high reliability applications , such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams ag for each application. this product is provided by ams ag as is and any express or implied wa rranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams ag shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. no obligation or liability to recipient or any th ird party shall arise or flow out of ams ag rendering of technical or other services. copyrights & disclaimer
page 20 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? document status document status product status definition product preview pre-development information in this datasheet is based on product ideas in the planning phase of development. all specifications are design goals without any warranty and are subject to change without notice preliminary datasheet pre-production information in this datasheet is based on products in the design, validation or qualific ation phase of development. the performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice datasheet production information in this datashee t is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams ag standard warranty as given in the general terms of trade datasheet (discontinued) discontinued information in this datasheet is based on products which conform to specifications in accordance with the terms of ams ag standard warranty as given in the general terms of trade, but these products have been superseded and should not be used for new designs document status
ams datasheet page 21 [v1-06] 2015-apr-07 document feedback as1111 ? revision information note(s) and/or footnote(s): 1. page and figure numbers for the previous version may diff er from page and figure numbers in the current revision. 2. correction of typographical er rors is not explicitly mentioned. changes from 1-01 (2013-nov) to current revision 1-06 (2015-apr-07) page 1-01 (2013-nov) to 1-03 (2014-dec-03) content was updated to the latest ams design updated figure 3 3 1-03 (2014-dec-03) to 1-04 (2015-mar-20) updated caption below figure 3 3 updated figure 5 5 updated figure 11 9 updated figure 16 & figure 17 12 1-04 (2015-mar-20) to 1-05 (2015-apr-06) updated figure 5 5 updated figures 16 & 17 12 1-05 (2015-apr-06) to 1-06 (2015-apr-07) updated text under general description 1 revision information
page 22 ams datasheet document feedback [v1-06] 2015-apr-07 as1111 ? content guide 1 general description 1 key benefits & features 2 applications 2 block diagram 3 pin assignment 3 pin description 4absolute maximum ratings 6 electrical characteristics 8 typical operating characteristics 13 detailed description 13 setting of the led current 14 package drawings & markings 17 ordering & contact information 18 rohs compliant & ams green statement 19 copyrights & disclaimer 20 document status 21 revision information content guide

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