SGM3139 6-channel 1-wire dimming led driver with ultra low dropout current source general description the SGM3139 is a 6-channel ultra low dropout constant source parallel led driver. the SGM3139 uses an internal resistor to set the bias current for six leds, which are matched to 3%. the SGM3139 incorporates a single wire interface to program the output current at 16 continuous steps. it has an internal deglitch circuit for filtering the noise of the en input. the SGM3139 requires only a 35mv dropout voltage at a 20ma load. the feature makes SGM3139 ideal for battery-operated systems, such as personal digital assistants. the SGM3139 is available in green tqfn-33-16l and tdfn-33-10l packages and is specified over an ambient temperature range of -40 to +85 . applications wireless handsets mp3, mp4, and pmp cellular phones portable communication devices digital cameras, camcorders pdas, palmtops, and handy terminals battery-powered equipment features ultra low dropout: 35mv/20ma support up to 6 leds led sink current 20ma 3% led current matching deglitch circuit thermal shutdown protection 16-step brightness control no emi and switch noise operating temperature range: -40 to +85 available in green tqfn-33-16l and tdfn-33-10l packages typical application 1 2 n=16 pulse inpput en/set led1 led2 led3 led4 agnd pgnd vin SGM3139 2.5v to 5.0v 1f led5 led6 rev. a. 3 sg micro corp www.sg-micro.com
6-channel 1-wire dimming led driver with ultra low dropout current source 2 SGM3139 sg micro corp www.sg-micro.com package/ordering information model order number package description specified temperature range marking information package option SGM3139ytq16g/tr tqfn-33-16l -40c to +85c 3139tq tape and reel, 3000 SGM3139 SGM3139yd10g/tr tdfn-33-10l -40c to +85c SGM3139d tape and reel, 3000 absolute maximum ratings v in to gnd????????.??...???????-0.3v to 6v the other pins to gnd ?????..????......... -0.3v to 6v power dissipation, p d @ t a = 25 tqfn-33-16l????????.??????????1.47w tdfn-33-10l???????.?????????.?...1.67w storage temperature range???????.?-40 to +150 junction temperature... ??????.?.?.??.?...?...150 operating temperature range???.??..??-40 to +85 lead temperature (soldering 10 sec) ???????????????..?????????.. 260 esd susceptibility hbm????????????????..???.???4000v mm???????????????..?.???.?...??400v notes: 1. the thermal resistance figures are for general reference only. actual thermal characteristics may vary with the pcb layout, size of metal trace, the therma l conduction path between metal layers and the environment of the system. 2. stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the s pecifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. caution this integrated circuit can be damaged by esd if you don?t pay attention to esd protection. sgmicro recommends that all integrated circuits be handled with appropriate precautions. failure to observe proper handling and installation procedures can cause damage. esd damage can range from subtle performance degradation to complete device failure. precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. sgmicro reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. please contact sgmicro sales office to get the latest datasheet.
6-channel 1-wire dimming led driver with ultra low dropout current source 3 SGM3139 sg micro corp www.sg-micro.com pin configurations (top view) 1 10 9 8 7 6 2 3 4 5 led3 led4 led5 led6 pgnd en/set vin agnd tdfn-33-10l led2 led1 gnd 1 2 3 4 5 7 8 9 10 led6 led2 agnd 6 11 12 13 14 15 16 pgnd vin en/set n.c. led5 led4 led3 led1 n.c. n.c. n.c. n.c. n.c. tqfn-33-16l gnd pin description pin number tqfn-33-16l tdfn-33-10l pin name pin function 5 5 agnd analog ground. 6 2 pgnd power ground. 7 4 vin power input voltage. 8 3 en/set enable input (active high). one wire interface for led dimming connects to gpio pin of mcu. 1, 2, 3, 4, 16 n.c. no internal connection. 10 6 led6 current sink for led6. connect to cathode of external white led. 11 7 led5 current sink for led5. connect to cathode of external white led. 12 8 led4 current sink for led4. connect to cathode of external white led. 13 9 led3 current sink for led3. connect to cathode of external white led. 14 10 led2 current sink for led2. connect to cathode of external white led. 15 1 led1 current sink for led1. connect to cathode of external white led. gnd gnd exposed pad exposed pad should be soldered to pcb board and connected to gnd.
6-channel 1-wire dimming led driver with ultra low dropout current source 4 SGM3139 sg micro corp www.sg-micro.com electrical characteristics (v in = 3.6v, c in = 1 ? f, t a = +25 , unless otherwise noted.) parameter symbol conditions min typ max units operation voltage range v in 2.5 5.0 v en/set pull low current v en/set = 1.8v 0.01 ? a quiescent power supply current i q v in = 5.0v, led off 0.72 ma shutdown current i shdn v en/set = 0v, v in = 5.0v 0.1 5 a i ledx accuracy i led-err -10 +10 % led current deviation matching d led -3 +3 % led dropout voltage v led i ledx = 20ma, v led @ i ledx = 90% i led 35 mv en/set low time for shutdown t shdn 1.6 ms en/set low time for dimming t lo 0.5 500 s en/set high time for dimming t hi 0.5 s logic-high voltage v ih v en > v ih for enable ih 1.2 v en/set threshold logic-low voltage v il v en < v il for disable il 0.5 v thermal shutdown temperature 145 hysteresis temperature 10
6-channel 1-wire dimming led driver with ultra low dropout current source 5 SGM3139 sg micro corp www.sg-micro.com typical performance characteristics led current vs. input voltage 0 5 10 15 20 25 2.5 3 3.5 4 4.5 5 input voltage (v) led current (ma) led1 led2 led3 led4 led5 led6 led current vs. temperature 16 18 20 22 24 -40 -15 10 35 60 85 temperature ( ) led current (ma) led current vs. led dropout voltage 0 5 10 15 20 25 0 0.4 0.8 1.2 1.6 2 led dropout voltage (v) led current (ma) quiescent current vs. temperature 0.6 0.65 0.7 0.75 0.8 -40 -15 10 35 60 85 temperature ( ) quiescent current (ma) line transient response time (100 s/div) v en = 3.6v v in = 3.2v to 3.7v v in i led 25ma 1v /div 0ma
6-channel 1-wire dimming led driver with ultra low dropout current source 6 SGM3139 sg micro corp www.sg-micro.com function block diagram led1 led2 led3 led4 shutdown delay low dropout current source en/set v in 16 steps pulse dimming controller led5 led6 application information led connection the SGM3139 supports up to 6 white leds. the six leds are connected from vin to tqfn-33-16l package?s pin 10, 11, 12, 13, 14 and 15 respectively. for tdfn-33-10l package, cathodes of white leds are connected to pin1, 6, 7, 8, 9, and 10. the led pins can be left floating if the white leds are not used. brightness control the SGM3139 implements a pulse dimming method to control the brightness of white leds. users can easily configure the led current from 1.25ma to 20ma by a serial pulse. the dimming of white leds' current can be achieved by applying a pulse signal to the en/set pin. there are totally 16 steps of current that could be set by users. the detail operation of brightness dimming is showed in the figure 1. en/set i ledx shutdown 100% 15/16 14/16 13/16 12/16 3/16 2/16 1/16 15/16 100% shutdown 01234514 1501 30s < t ready 0.5s < t hi 0.5s < t lo < 500s 3ms < t shdn figure 1. brightness control by pulse dimming
6-channel 1-wire dimming led driver with ultra low dropout current source 7 SGM3139 sg micro corp www.sg-micro.com package outline dimensions tdfn-33-10l recommended land pattern (unit: mm) 1.7 2.8 2.4 0.6 0.24 0.5 a n10 n5 n1 d1 e1 side view bottom view top view a1 a2 k b l e d e dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a2 0.203 ref 0.008 ref d 2.900 3.100 0.114 0.122 d1 2.300 2.600 0.091 0.103 e 2.900 3.100 0.114 0.122 e1 1.500 1.800 0.059 0.071 k 0.200 min 0.008 min b 0.180 0.300 0.007 0.012 e 0.500 typ 0.020 typ l 0.300 0.500 0.012 0.020
6-channel 1-wire dimming led driver with ultra low dropout current source 8 SGM3139 sg micro corp www.sg-micro.com package outline dimensions tqfn-33-16l top view bottom view side view a a2 a1 e e1 b l k d1 d e n1 n5 n16 1.7 1.7 0.7 2.2 3.6 0.5 0.24 recommended land pattern (unit: mm) dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a2 0.203 ref 0.008 ref d 2.900 3.100 0.114 0.122 d1 1.600 1.800 0.063 0.071 e 2.900 3.100 0.114 0.122 e1 1.600 1.800 0.063 0.071 k 0.200 min 0.008 min b 0.180 0.300 0.007 0.012 e 0.500 typ 0.020 typ l 0.300 0.500 0.012 0.020
6-channel 1-wire dimming led driver with ultra low dropout current source 9 SGM3139 sg micro corp www.sg-micro.com tape and reel information note: the picture is only for reference. please make the object as the standard. key parameter list of tape and reel package type reel diameter reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p0 (mm) p1 (mm) p2 (mm) w (mm) pin1 quadrant tqfn-33-16l 13 12.40 3.35 3.35 1.13 4.00 4.00 2.00 12.00 q1 tdfn-33-10l 13 12.4 3.35 3.35 1.13 4.00 8.00 2.00 12.00 q1 reel width (w1) reel diameter reel dimensions tape dimensions direction of feed p2 p0 w p1 a0 k0 b0 q1 q2 q4 q3 q3 q4 q2 q1 q3 q4 q2 q1
6-channel 1-wire dimming led driver with ultra low dropout current source 10 SGM3139 sg micro corp www.sg-micro.com carton box dimensions note: the picture is only for reference. please make the object as the standard. key parameter list of carton box reel type length (mm) width (mm) height (mm) pizza/carton 13 386 280 370 5
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