SGM3132 4-channel 1-wire dimming led driver with ultra low dropout current source general description the SGM3132 is a 4-channel ultra low dropout constant source parallel led driver. the SGM3132 uses an internal resistor to set the bias current for four leds. the SGM3132 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 SGM3132 requires only a 35mv dropout voltage at a 20ma load. the feature makes SGM3132 ideal for battery-operated systems, such as personal digital assistants. the SGM3132 is available in green tqfn-33-16l, tdfn-22-8l and msop-8 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 4 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, tdfn-22-8l and msop-8 packages typical application 1 2 n=16 pulse inpput en led1 led2 led3 led4 agnd pgnd vin SGM3132 2.5v to 5.0v 1f rev. a. 2 sg micro corp www.sg-micro.com
4-channel 1-wire dimming led driver with ultra low dropout current source 2 SGM3132 sg micro corp www.sg-micro.com package/ordering information model order number package description specified temperature range marking information package option SGM3132ytq16g/tr tqfn-33-16l -40c to +85c 3132tq tape and reel, 3000 SGM3132yde8g/tr tdfn-22-8l -40c to +85c 3132 tape and reel, 3000 SGM3132 SGM3132yms8g/tr msop-8 -40c to +85c SGM3132yms8 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 (1) , p d @ t a = 25 tqfn-33-16l?????????.??.??????1.47w tdfn-22-8l???????????..????.??.0.61w msop-8?????????...???..???????0.57w storage temperature range????.???-40 to +150 junction temperature...??????.??..????... 125 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 thermal 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 functi onal operation of the device at these or any other conditions beyond those indicated in the operational sections of the sp ecifications 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.
4-channel 1-wire dimming led driver with ultra low dropout current source 3 SGM3132 sg micro corp www.sg-micro.com pin configurations (top view) 8 7 6 5 1 2 3 4 led1 led2 led3 led4 pgnd en vin agnd msop-8 8 7 6 5 1 2 3 4 led1 led2 led3 led4 pgnd en vin agnd tdfn-2x2-8l gnd 1 2 3 4 5 7 8 9 10 led4 n.c. agnd 6 11 12 13 14 15 16 pgnd vin en n.c. led3 led2 led1 n.c. n.c. n.c. n.c. n.c. n.c. tqfn-33-16l gnd pin description pin number tqfn-33-16l tdfn-22-8l msop-8 pin name pin function 5 4 4 agnd analog ground. 6 1 1 pgnd power ground. 7 3 3 vin power input voltage. 8 2 2 en enable input. active high and connect to gpio pin of mcu. 10 5 5 led4 current sink for led4. connect to cathode of external white led. 11 6 6 led3 current sink for led3. connect to cathode of external white led. 12 7 7 led2 current sink for led2. connect to cathode of external white led. 13 8 8 led1 current sink for led1. connect to cathode of external white led. 1,2,3,4, 9,14,15,16 ? ? n.c. no internal connection. exposed pad exposed pad ? gnd exposed pad should be soldered to pcb board and connected to gnd.
4-channel 1-wire dimming led driver with ultra low dropout current source 4 SGM3132 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 pull low current v en = 1.8v 0.01 ? a quiescent power supply current i q v in = 5.0v, led off 0.55 ma shutdown current i shdn v en = 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 low time for shutdown t shdn 1.6 ms en low time for dimming t lo 0.5 500 s en 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 threshold logic-low voltage v il v en < v il for disable il 0.5 v thermal shutdown temperature 150 hysteresis temperature 10
4-channel 1-wire dimming led driver with ultra low dropout current source 5 SGM3132 sg micro corp www.sg-micro.com typical performance characteristics led current vs. input voltage 0 5 10 15 20 25 30 2 2.5 3 3.5 4 4.5 5 5.5 input voltage (v) led current (ma) led1 led2 led3 led4 led current vs. temperature 15 17 19 21 23 25 -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 0.5 0.52 0.54 0.56 0.58 0.6 -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
4-channel 1-wire dimming led driver with ultra low dropout current source 6 SGM3132 sg micro corp www.sg-micro.com function block diagram led1 led2 led3 led4 16 steps pulse dimming controller shutdown delay low dropout current source en gnd vin application information led connection the SGM3132 supports up to 4 white leds. the four leds are connected from vin to tqfn-33-16l package?s pin 10, 11, 12 and 13 respectively. for tdfn-22-8l and msop-8 packages, cathode of white leds are connected to pin 5, 6, 7 and 8 respectively. brightness control the SGM3132 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 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 i ledx shutdown 100% 15/16 14/16 13/16 12/16 3/16 2/16 1/16 15/16 100% shutdown 0 1234514 1501 30 s < t ready 0.5 s < t hi 0.5 s < t lo < 500 s 3ms < t shdn figure 1. brightness control by pulse dimming
4-channel 1-wire dimming led driver with ultra low dropout current source 7 SGM3132 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
4-channel 1-wire dimming led driver with ultra low dropout current source 8 SGM3132 sg micro corp www.sg-micro.com package outline dimensions tdfn-22-8l recommended land pattern (unit: mm) 0.50 0.24 1.20 0.60 l a1 a2 a n8 n1 n4 k e d1 e1 b e d side view bottom view top view 1.95 0.65 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 1.900 2.100 0.075 0.083 d1 1.100 1.300 0.043 0.051 e 1.900 2.100 0.075 0.083 e1 0.500 0.700 0.020 0.028 k 0.200 min 0.008 min b 0.180 0.300 0.007 0.012 e 0.500 typ 0.020 typ l 0.250 0.450 0.010 0.018
4-channel 1-wire dimming led driver with ultra low dropout current source 9 SGM3132 sg micro corp www.sg-micro.com package outline dimensions msop-8 e1 e e d a1 l c a a2 b recommended land pattern (unit: mm) 1.02 0.41 0.65 4.8 dimensions in millimeters dimensions in inches symbol min max min max a 0.820 1.100 0.032 0.043 a1 0.020 0.150 0.001 0.006 a2 0.750 0.950 0.030 0.037 b 0.250 0.380 0.010 0.015 c 0.090 0.230 0.004 0.009 d 2.900 3.100 0.114 0.122 e 2.900 3.100 0.114 0.122 e1 4.750 5.050 0.187 0.199 e 0.650 bsc 0.026 bsc l 0.400 0.800 0.016 0.031 0 6 0 6
4-channel 1-wire dimming led driver with ultra low dropout current source 10 SGM3132 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-22-8l 7 9.5 2.30 2.30 1.10 4.00 4.00 2.00 8.00 q1 msop-8 13 12.4 5.2 3.3 1.5 4.0 8.0 2.0 12.0 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
4-channel 1-wire dimming led driver with ultra low dropout current source 11 SGM3132 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 7 (option) 368 227 224 8 7 442 410 224 18 13 386 280 370 5
|
