page 1 of 4 397 route 281 p.o. box 1175 tully, new york 13159-1175 phone: 315 696-6676 fax: 315 696 9923 email: sales@acipower.com www.acipower.com ACI-A038040-1855 product data sheet 05/15/09 i-lite, 8.0 watt led driver (common-cathode, one to six channels) general description the ACI-A038040-1855 is designed to drive up to 6 parallel channels of series connected leds. the number of channels and current per channel are configurable per table 1 on page 3, by setting a four- position switch located on the driver, enabling the driver to support a wide range of displays. operating as a true constant current source, the driver provides a complete integrated solution that operates from a nominal +12v source. this unit features enable and intensity control inputs. additional support documentation: 1. i-lite led driver application note 2. driving optrex panels with ACI-A038040-1855 mechanical/environmental weight = 7.2 grams altitude = 35,000 ft max. humidity < 95% non-condensing size (l x w x h) = 2.0 in x 0.95 in x 0.285 in pcb thickness = 0.062 in mounting holes = 0.120 in diameter (x2) input power & control connector = con1 led output connectors = con2 and con3 rohs compliant input connector con1 molex 53261-0571 pin # function 1 +vin(pwr) 2 gnd(pwr) 3 enable (in) 4 intensity cntl (in) 5 +3.3vref (out) output connectors con2 and con3 jst sm06b-shls-tf pin # function 1 led anode #1 2 led anode #2 3 led anode #3 4 led cathode (common) 5 led cathode (common) 6 led cathode (common) 2.00 in 0.950 in 0.100 in 1.80 in con1 con2 con3 0.100 in 0.750 in 0.120 in hole (x2) 0.150 in pad (x2) 4 position max intensity select switch (s1) 0.062 in (pcb) 0.285 in ? a b c d a b c d
page 2 of 4 397 route 281 p.o. box 1175 tully, new york 13159-1175 phone: 315 696-6676 fax: 315 696 9923 email: sales@acipower.com www.acipower.com ACI-A038040-1855 product data sheet 05/15/09 maximum ratings* symbol parameter value unit vin supply voltage (referenced to ground) -0.3 to 19 vdc vip voltage applied to any input pin (referenced to ground) -0.3 to 3.6 vdc iop current sourced or sinked from any output control pin +/- 10 madc pin input power (dc input voltage x dc input current) 10.1 w top operating temperature (still air ambient around driver) -30 to +85 c tstg storage temperature -40 to +105 c *maximum ratings are those values beyond which damage to the led driver may occur recommended operating conditions symbol parameter min max unit vin supply voltage (referenced to ground) 8.0 18.0 vdc vf series connected cumulative led forward-drop voltage **vin + 1 38 vdc icntl led intensity control voltage 0.25 3.0 vdc **vin must be less than the minimum forward-drop voltage (vf). electrical characteristics vin = +12v, icntl = +3.0v, enable = +3.0v, unless otherwise specified symbol parameter test conditions min nom max unit ocv open circuit voltage no load 45 50 55 vdc enoff enable control, unit off enable (pin 3) 0.4 vdc enon enable control, unit on enable (pin 3) 1.8 vdc +3.3vref +3.3v output reference voltage 1k ohm load to ground (pin 5) 3.13 3.3 3.47 vdc iadj nominal output current adjust range icntl (pin4) = +0.25v to 3.0v 0 note1 iind input current draw (disabled) enable (pin 3) = 0v 0.001 0.06 adc eff electrical efficiency 90 % note1: maximum current per configuration selected (refer to table 1 on page 3) electrical characteristics continued on page 3.
page 3 of 4 397 route 281 p.o. box 1175 tully, new york 13159-1175 phone: 315 696-6676 fax: 315 696 9923 email: sales@acipower.com www.acipower.com ACI-A038040-1855 product data sheet 05/15/09 electrical characteristics (for popular configurations) vin = +12v, icntl = +3.0v, enable = +3.0v, unless otherwise specified symbol parameter test conditions min nom max unit iout output current per channel 114 120 126 madc iin input current draw number of led channels driven = 2 vf = 32.8v s1 = a 0.69 0.73 0.77 adc iout output current per channel 85.5 90 94.5 madc iin input current draw number of led channels driven = 2 vf = 23.7v s1 = b 0.38 0.40 0.42 adc iout output current per channel 66.5 70 73.5 madc iin input current draw number of led channels driven = 2 vf = 38v s1 = c 0.47 0.49 0.52 adc iout output current per channel 57 60 63 madc iin input current draw number of led channels driven = 3 vf = 13.2v s1 = b 0.21 0.22 0.23 adc iout output current per channel 33.3 35 36.8 madc iin input current draw number of led channels driven = 4 vf = 32v s1 = c 0.39 0.42 0.44 adc possible configurations switch setting (s1) number of led channels driven 1 2 3 4 5 6 iout/ch (ma) vf max (v) iout/ch (ma) vf max (v) iout/ch (ma) vf max (v) iout/ch (ma) vf max (v) iout/ch (ma) vf max (v) iout/ch (ma) vf max (v) a 240 33 120 33 80 33 60 33 48 33 40 33 b 180 38 90 38 60 38 45 38 36 38 30 38 c 140 38 70 38 46.7 38 35 38 28 38 23.3 38 d switch setting d has been reserved for future configurations. table1. output current per channel, based on switch (s1) setting and number of channels driven caution: when selecting the number of channels to be driven and current per channel from one of the configurations in table 1 above, you must ensure that the forward-drop voltage (vf) in your application does not exceed the vf max value specified in table 1. the nominal input current draw, based on vin, can be calculated from the following equation: nominal input current draw (a) = iout per channel (ma) x number of channels x vf (v) x 0.0011 vin (v)
page 4 of 4 397 route 281 p.o. box 1175 tully, new york 13159-1175 phone: 315 696-6676 fax: 315 696 9923 email: sales@acipower.com www.acipower.com ACI-A038040-1855 product data sheet 05/15/09 led inte nsity vs. icntl voltage 0% 20% 40% 60% 80% 100% 0 .0 0 .5 1.0 1.5 2.0 2 .5 3 .0 3.5 icntl (volts) led intensity
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