ec4211 constant current linear led drive r e-cmos corp. (www.ecmos.com.tw) 3d03n rev. f003 page 1of 8 r gain (optional) 120vac 60hz current set point v led(total) =120v i led <60ma r ext features ? constant led current for varying input voltage ? adjusted current operation ? low quiescent current ? simplifies circuit and system designs ? compact component count ? provided higher current by parallel ? temperature compensated constant current ? over current protection ? over temperature protection ? led current programmable thermal foldback for thermal protection ? sop-8l package or dfn-8l package or to252-5l package applications ? led driver ? lighting applications ? lamp indicators ? candle light ? low cost solution ? constant current source general description the ec4211 is a constant current linear led driver for replace discrete solutions in ac/dc power application (up to 265v). the device is to drive a constant current of 5% variation by an external resistor for different led strings. the solution eliminates the need of individual components by combining them into a single package, which results in a significant redu ction of both system cost and board space. for highe r current application, multiple ec4211s can also be used in parallel such as 40ma, 80ma or 160ma. the ec4211 is self- protected against over temperature and over current. internal thermal fo ldback function regulates led driver current automatically to limit die temperature during high power operation or high ambient temperature conditions. these features provide maximum system protection for the demanding lighting applications. the ec4211 is available in a space saving sop-8l package, dfn-8l package or to252-5l package, and the operating temperature is from ?40c to +125c. typical application circuit fig. 1 simplified application circuit
ec4211 constant current linear led drive r e-cmos corp. (www.ecmos.com.tw) 3d03n rev. f003 page 2of 8 1 2 3 (sop-8l) 4 8 7 6 5 r gain v led v led v led v led v in r ext nc thermal pad 5 r gain 4 v in 13 2 3 (to252-5l) r ext nc v led thermal pad dfn-8l r ext v in nc thermal pad 1 2 3 4 5 6 7 8 v led v led v led v led r gain absolute maximum ratings v in supply voltage............ .............. ................ ......... 500v r ext , r gain operation voltages?................................ 6v operating temperature??? ???? -40c to +125c storage temperature???????? -55c to +150c maximum die temperature?????????. +150c lead temperature????????????.? +260c esd hbm voltage???????????....?? 2.5kv esd mm voltage??????????????? 300v pin configuration note: absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditions is not implied. conti nuous operation of the device at the absolute rating level may affect device reliability. ordering information part no. package type marking information remark ec4211nnmhr sop-8l ec4211 yyww lllllt yyww date code lllll lot no t internal tracking code EC4211NNF2R dfn-8l ec4211 lllll yywwt ec4211nna5r to252-5l ec4211 yyww lllllt electrical characteristics t a = 25 c unless otherwise specified parameter conditions min typ max unit electrical characteristic v in operation voltage 15 265 v i led current regulation (note 1) v in =120vdc, r ext =15 ? , v led =100v 38.16 40.17 42.18 ma v in =220vdc, r ext =30 ? , v led =200v 19.16 20.17 21.18 ma i led(max) maximum current regulation v drop Q 16v (note 2) 60 ma i q quiescent current v in =20vdc, r ext =open 170 a v ref reference voltage (note 3) 0.6 v v drop(max) maximum dropout voltage (note 4) v in = 265vac, r ext =30 , v led =220v 170 v thermal characteristic v ref (t) v ref temperature coefficient t a =-40c ~125c 0.01 / t a operating temperature -40 125 p d total power dissipation (operation) 1 w r ja thermal resistance sop-8l package 75 /w dfn-8l package 33.2 /w to252-5l package 68 /w protection ocp over current protection 150 ma otp over temperature protection 150 tfp thermal foldback protection (note 5) 90 note: 1. i led =0.6/r ext +i q 2. v drop =v in v led 0.6, p d 1w (no heat sink) 3. v ref =v(r ext ) v led 4. the current regulation is for a instantaneous ac line input cu rrent only, not to exceed thermal characteristics of package. 5. i led(tfp) =i led v(r gain )/r gain
e-cmos corp. (www.ecmos.com.tw) 3d03n rev. f003 ec4211 constant current linear led driver page 3of 8 control circuits v in v led r gain r ext protection circuits function diagram pin descriptions to252-5l package dfn-8l / sop-8l package pin symbol description 1 r ext an external resistor between r ext and v led pin sets different current regulation for led strings. 2 nc no internal mechanically connection. leave this pin open. 3 v led the led strings are connected from this pin to ground. 4 v in input supply voltage. 5 r gain programmable thermal foldback pr otection for current regulation to limit die temperature during high power operation or high ambient temperature conditions. pin symbol description 1 r gain programmable thermal foldback pr otection for current regulation to limit die temperature during high power operation or high ambient temperature conditions. 2 v in input supply voltage. 3 nc no internal mechanically connection. leave this pin open. 4 r ext an external resistor between r ext and v led pin sets different current regulation for led strings. 5, 6, 7, 8 v led the led strings are connected from these pins to ground. fi g . 2 detailed block dia g ram
e-cmos corp. (www.ecmos.com.tw) 3d03n rev. f003 ec4211 constant current linear led driver page 4of 8 18.5 19 19.5 20 20.5 21 21.5 22 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature ( ) output current (ma) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 102030405060 input voltage (v) v ref (v) 80 100 120 140 160 180 200 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature ( ) quiescent current (ua ) 0 5 10 15 20 25 0 15 30 45 60 75 90 105 120 135 temperature ( ) output current (ma) 0 10 20 30 40 50 60 70 80 90 100 0 1020304050607080 output current (ma) r ext ( ? ) 0.590 0.595 0.600 0.605 0.610 0.615 0.620 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature ( ) v ref (v) electrical characteristics (t a = 25c, unless otherwise specified) v ref vs. temperature output current vs. temperature v in =16.5vdc r ext =30 r gain =o p en output current vs. r ext v ref vs. input voltage thermal foldback vs. temperature quiescent current vs. temperature r gain =10k r ext =30 r gain =open v in =16.5vdc r ext =30 r gain =o p en v in =16.5vdc r gain =open r gain =20k v in =16.5vdc r ext =open r gain =o p en v in =16.5vdc r ext =30
e-cmos corp. (www.ecmos.com.tw) 3d03n rev. f003 ec4211 constant current linear led driver page 5of 8 electrical characteristics (continuted) transient response transient response over current protection transient response vs. thermal foldback v in =120vac r ext =10 r gain =open v in =220vac r ext =24 r gain =open v in =130vac r ext =8.2 r gain =15k v in =60vdc r ext =short r gain =open over temperature protection v in =130vac r ext =short r gain =open
e-cmos corp. (www.ecmos.com.tw) 3d03n rev. f003 ec4211 constant current linear led driver page 6of 8 br1 ac current set point v led i led 4 1 3 to252-5 r ext r gain (optional) 5 f1 rv1 d1 led lighting ec4211 application circuit schematic 110vac 4w led lighting demo board part list component value package u1 ec4211 to252-5l br1 b10s smd f1 1a dip rv1 221kd14 (140vac) dip d1 1n4003 dip r ext 8.5 0603 r gain 7.5k 0603 v led 120v na 220vac 4w led lighting demo board part list component value package u1 ec4211 to252-5l br1 b10s smd f1 1a dip rv1 431kd14 (275vac) dip d1 1n4003 dip r ext 24 0603 r gain 7.5k 0603 v led 240v na note: 1. rv1 is for surge protection. 2. d1 is for hi-pot protection. fi g . 3 t yp ical a pp lication circuit
e-cmos corp. (www.ecmos.com.tw) 3d03n rev. f003 ec4211 constant current linear led driver page 7of 8 outline dimensions (dimensions shown in millimeters) to252-5l package sop-8l package
e-cmos corp. (www.ecmos.com.tw) 3d03n rev. f003 ec4211 constant current linear led driver page 8of 8 dfn-8l package
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