p r oduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 1 copyright ? 2005 rev. 1.0, 2006-01-13 www. microsemi . com panelmatch ? 5v 10w dual ccfl programmable inverter module tm ? description the LXMG1626-05-66 is a 10w dual output direct drive ? ccfl (cold cathode fluorescent lamp) inverter module specifically designed to be compatible with a variety of lcd panels: a number of nec and a few optrex, prime view, au optronics, and other panels that have both lamps on one side of the panel and use a single common lamp return wire with non standard output polarity. lxmg1626 modules provide the designer with a vastly superior display brightness range. this brightness range is achievable with virtually any lcd display. the modules are available with a dimming input that permits brightness control from either: a dc voltage source, a pwm signal, or external potentiometer. the maximum output current is externally programmable (through the input connector) over a range of 10 to 14ma in steps. this allows the inverter to match the panel?s lamp current specifications or it can be used to purposely drive the lamps at a lower or higher current to decrease or increase nominal brightness. the rangemax? digital dimming technique provides flicker-free bright- ness control in any wide range (typically 100:1+) dimming application. the design of the resultant ?burst drive? that energizes the lamp specifically ensures that no premature lamp degradation occurs, while allowing significant power savings at lower dim levels. the modules convert dc voltage from the system battery or ac adapter directly to high frequency, high-voltage waves required to ignite and operate ccfl lamps. the modules design utilizes microsemi?s lx1691b backlight controller, which provides a number of cost and performance advantages due to the controller?s high level of integration. a 12v input supply version (lxmg1626-12-66) is also available. other benefits of this new topology are: stable fixed-frequency operation, secondary-side strike-voltage regulation, and both open/shorted lamp protection with fault timeout. important: for the most current data, consult microsemi ?s website: http://www.microsemi.com protected by u.s. patents: 5,923,129; 5,930,121; 6,198,234; patents pending key features ? externally programmable maximum output current ? easy to use brightness control ? rangemax? wide range dimming ? output open & short-circuit protection and automatic strike- voltage regulation and timeout ? fixed frequency operation ? rated from -20 to 70c ? rohs compliant ? applications ? dual lamp lcd?s requiring a shared common lamp return ? mates to a single jst bhr- 03vs-1 lamp connector ? output connector polarity 1:low, 2:high, 3:high ? desktop displays ? industrial display controls benefits ? smooth, flicker free 1%-100% full-range brightness control ? programmable output current allows inverter to mate with a wide variety of lcd panel?s specifications ? output open circuit voltage regulation minimizes corona discharge for high reliability product highlight u niversal d imming i nput " pwm ", v dc , or p otentiometer lamp current 10 to 14ma in steps dc voltage source potentiometer pwm signal input microsemi 123 w hi hi package order info p art n umber o utput c onnector i nverter m ates d irectly to p anel c onnectors LXMG1626-05-66 jst sm03(4.0)b-bhs-1-tb(lf)(sn) or yeon ho 20015wr-05a00 jst bhr-03vs-1 l l x x m m g g 1 1 6 6 2 2 6 6 - - 0 0 5 5 - - 6 6 6 6
p r oduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 2 copyright ? 2005 rev. 1.0, 2006-01-13 www. microsemi . com panelmatch ? 5v 10w dual ccfl programmable inverter module tm ? absolute maximum ratings (note 1) input signal voltage (v in1 ).............................................................................................................................. ......-0.3v to 6.5v input po wer .................................................................................................................... ................................................... 14w output volta ge, no load ........................................................................................................ .... internally limited to 1800v rms output curr ent ................................................................................................................. ...........7.5ma rms (internally limited) output power .................................................................................................................. ................................................. 10w input signal voltage ( sleep input) ....................................................................................................................-0.3 v to 5.5v input signal vo ltage (bri te) ................................................................................................... ............................-0.3v to 5.5v ambient operating temper ature, zero airflow.................................................................................... .................-20c to 70c operating relative hu midity, non-c ondensin g .................................................................................... ............................ 90% storage temperat ure ra nge...................................................................................................... .........................-40c to 85c note 1: exceeding these ratings could caus e damage to the device. all voltages are wi th respect to ground. currents are posi tive into, negative out of specified terminal. recommended operating conditions (r.c.) this module has been designed to operate ove r a wide range of input and output conditions. however, best efficiency and perfor mance will be obtained if the module is operated under the condition listed in the ?r.c.? column. min. and max. columns indicate val ues beyond which the inverter, although operatio nal, will not function optimally. recommended operating conditions parameter symbol min r.c. max units input supply voltage range (fully regulated lamp current) 4.75 5 5.25 input supply voltage range (functional) v in1 4.5 5 5.5 v output power p o 8 9 w linear brite control input voltage range v brt_adj 0 2.0 v lamp operating voltage v lamp 460 540 620* v rms lamp current (full brightness) i olamp 10 14 ma rms operating ambient te mperature range t a -20 70 c * at higher lamp voltages the maximum lamp current is limited to about 12ma @ v in1 = 4.75v, lamp voltage is based on single lamp measurements electrical characteristics unless otherwise specified, the following specifications apply ov er the recommended operating condition and ambient temperature of 25 c except where otherwise noted. LXMG1626-05-66 parameter symbol test conditions min typ max units ` output pin characteristics full bright lamp current (two lamps) i l(max) v brt_adj > 2.0v dc , sleep > 2.0v, v in1 = 5v dc i set1 = ground, i set2 = ground 8.8 10 11 ma rms full bright lamp current (two lamps) i l(max) v brt_adj > 2.0v dc , sleep > 2.0v, v in1 = 5v dc i set1 = ground, i set2 = open 10.3 11.5 12.5 ma rms full bright lamp current ((two lamps) i l(max) v brt_adj > 2.0v dc , sleep > 2.0v, v in1 = 5v dc i set1 = open, i set2 = ground 11.3 12.8 13.8 ma rms full bright lamp current ((two lamps) i l(max) v brt_adj > 2.0v dc , sleep > 2.0v, v in1 = 5v dc i set1 = open, i set2 = open 12.3 14 15 ma rms output current lamp to lamp deviation i ll%dev v brt_adj > 2.0v dc , sleep > 2.0v, v in1 = 5v dc i set1 = open, i set2 = open 5 % min. average lamp current (each output) i l(min) v brt_adj = 0v dc , sleep > 2.0v, v in1 = 5v dc i set1 = i set2 = gnd; i min = i max * of % duty cycle 1.4 ma rms lamp start voltage v ls -20c < t a < 70c, v in1 > 4.5v dc 1350 1500 v rms operating frequency f o v brt_adj = 2.0v dc , sleep > 2.0v, v in1 = 5v 62 65 68 khz burst frequency f burst output burst frequency 242 254 266 hz e e l l e e c c t t r r i i c c a a l l s s
p r oduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 3 copyright ? 2005 rev. 1.0, 2006-01-13 www. microsemi . com panelmatch ? 5v 10w dual ccfl programmable inverter module tm ? electrical characteristics (continued) unless otherwise specified, the following specifications apply ov er the recommended operating condition and ambient temperature of 25 c except where otherwise noted. LXMG1626-05-66 parameter symbol test conditions min typ max units ` brite input v brt_adj = 0v dc -13.2 a dc input current i brt v brt_adj = 3v dc 1 a dc minimum input for max. lamp current v brt_adj i o(lamp) = maximum lamp current 2.0 2.05 v dc maximum input for min. lamp current v brt_adj i o(lamp) = minimum lamp current 0 v dc ` sleep input run mode sleep v 2.1 v in1 v dc sleep mode sleep v -0.3 0.8 v dc ` set 1,2 input set 1,2 low threshold v l 0.4 v input current i set v set 0.4v -300 a ` power characteristics sleep current i in(min) v in1 = 5v dc , sleep < 0.8v 0.0 10 50 a dc run current i in(run) v in1 = 5v dc , sleep 2.0v, i set1 = ground i set2 = open, v lamp = 520v rms 1490 ma dc efficiency v in1 = 5v dc , sleep 2.0v, i set1 = ground i set2 = open, v lamp = 520v rms 80 % functional pin description c onn p in d escription cn1 (molex 53261-0871) mates with 51021-0800 housing, 50079-8100 pins. mates with lx9501g input cable assembly cn1-1 cn1-2 v in1 main input power supply (4.75v < v in1 < 5.25v) cn1-3 cn1-4 gnd power supply return cn1-5 sleep on/off control. (0v < sleep < 0.8 = off, sleep >= 2.1v = on cn1-6 brite brightness control (0v to 2.0v dc ). 2.0v dc gives maximum lamp current. cn1-7 set 1 set 1 msb connecting this pin to ground decreas es the output current (see table 1) cn1-8 set 2 set 2 lsb connecting this pin to ground decr eases the output current (see table 1) cn2 for LXMG1626-05-66 (jst sm03(4.0)b-bhs-1-tb(lf)(sn) or yeon ho 20015wr-05a00) cn2-1 v lo connection to low side of lamp. connect to lamp terminal with longer lead length. do not connect to ground cn2-2 v hi1 high voltage connection to high side of lamp. connec t to lamp terminal with shortest lead length. do not connect to ground. cn2-3 v hi2 high voltage connection to high side of lamp. connec t to lamp terminal with shortest lead length. do not connect to ground. e e l l e e c c t t r r i i c c a a l l s s
p r oduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 4 copyright ? 2005 rev. 1.0, 2006-01-13 www. microsemi . com panelmatch ? 5v 10w dual ccfl programmable inverter module tm ? table 1 output current settings set 1 (pin 7) set 2 (pin 8) nominal output current open* open* 14.0ma open* ground 12.8ma ground open* 11.5ma ground ground 10.0ma * if driven by a logic signal it should be open collector or open drain only, not a voltage source. physical dimensions LXMG1626-05-66 cn1 16mm 0.630in. 4.0mm 0.157in. 119mm 4.69in. 25mm 0.984in. 133mm 5.24in. 1.0mm 0.0394in. 7.5mm 0.295in. max weight: 18g 21mm 0.827in. pcb tolerances 0.5mm , 4-40 recommended mounting screws u nplated m ounting h ole 3mm .08 dia . 6mm head clearance both holes g rounded m ounting h ole 3mm .08 dia . cn2 dimensions are in millimeters, inches for reference only. simplified block diagram ramp gen transformer driver 0 - 2v dc + - lamp v lo v hi1 comparator ramp v brite set 1 high voltage transformer i sense ov sense set 2 +3v 215k 10k +3v +3v v in1 oc sense 10k controller one of two lamp v hi2 9.09k p p a a c c k k a a g g e e d d a a t t a a
p r oduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 5 copyright ? 2005 rev. 1.0, 2006-01-13 www. microsemi . com panelmatch ? 5v 10w dual ccfl programmable inverter module tm ? typical application LXMG1626-05-66 5v set 2 gnd v hi2 v lo brite v in1 sleep set 1 500k dac or pot nc nc v hi1 figure 1 ? brightness control (output current set to maximum) p.w. 10 s to 20s period brite LXMG1626-05-66 0< p.w. < 100 % of period pwm signal from system figure 1a ? pwm brightness control LXMG1626-05-66 set 2 gnd v hi2 v lo sleep set 1 brite 5v v in1 v hi1 l l 10.0ma rms l h 11.5ma rms h l 12.8ma rms h h 14.0ma rms l=gnd; h=open figure 2 ? max output current (set 1 and set 2 inputs) ? the brightness control may be a voltage output dac or other voltage source, a digital pot or 500k manual pot. the inverter contains an internal 215k pull-up to 3v to bias the pot. a 3.3v logic level pwm signal from a micro- controller may also be used as shown in figure 1a. ? if you need to turn the inverter on/off remotely, connect to ttl logic signal to the slee p input. ? connect v hi1 and v hi2 to high voltage wires from the lamps. connect v lo to the low voltage wire lamp return (wire with thinner insulation). never connect v lo to circuit ground as this will defeat lamp current regulation. if both lamp wires have heavy high voltage insulation, connect the longest wire to v lo . this wire is typically white. ? use the set 1 and set 2 (see figure 2) inputs to select the desired maximum output current. using these two pins in combination allows the inverter to match a wide variety of panels from different manufacturers. generally the best lamp lifetime correlates with driving the ccfl at the manufacturer?s nominal current setting. however the set 1 and set 2 inputs allow the user the flexibility to adjust the current to the maximum allowable output current to increase panel brightness at the expense of some reduced lamp life. ? although the set pins are design ed such that just leaving them open or grounding them is a ll that is needed to set the output current, they can also be actively set. using an open collector or open drain logic signal will allow you to reduce the lamp current for situations where greater dim range is required, as an exampl e in nighttime situations. in conjunction with a light sensor or other timer the panel could be set to higher br ightness (maximum output current) for daytime illumination and lower brightness (minimum or typical output cu rrent) at nighttime. since the dim ratio is a factor of both the burst duty cycle and the peak output current, using this technique the effective dim ratio can be increased greater than the burst duty cycle alone. conversely, the set inputs could be used to overdrive the lamp temporarily to facilitate faster lamp warm up at initial lamp turn on. of course, any possible degradation on lamp life from such practices is the user?s responsibility since not all lamps are designed to be overdriven. ? the inverter has a built in fault timeout function. if both outputs are open (lamps disconnected or broken) or shorted to ground the inverter will attempt to strike the lamp for a number of cycles. after about one to two seconds without success the inverter will shutdown. in order to restart the inverter it is necessary to toggle the sleep input or cycle the v in1 input supply a a p p p p l l i i c c a a t t i i o o n n
p r oduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 6 copyright ? 2005 rev. 1.0, 2006-01-13 www. microsemi . com panelmatch ? 5v 10w dual ccfl programmable inverter module tm ? notes production data ? information contained in this document is proprietary to microsemi and is current as of publication date. this document may not be modified in any way without the express written consent of microsemi. product processing does not necessarily include testing of all parameters. microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. n n o o t t e e s s
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