p roduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 1 copyright ? 2002 rev. 1.1, 2006-11-13 www. microsemi . com panelmatch? LXMG1617-12-6X 12v 6w ccfl programmable inverter module tm ? description the LXMG1617-12-6X is a single output 6w direct drive? ccfl (cold cathode fluorescent lamp) inverter module specifically designed for driving lcd backlight lamps. it is ideal for driving typical 12.1? to 15? tft panels. lxmg1617 modules provide the designer with a vastly superior display brightness range. this brightness range is achievable with virtually any lcd display. the maximum output current is externally programmable over a range of 5 to 8ma in 1ma steps to allow the inverter to properly match to a wide array of lcd panel lamp current specifications. the modules include a dimming input that permits brightness control from a dc voltage source, a pwm signal or an external potentiometer. rangemax? digital dimming technique provides flicker-free brightness control in any wide range typically (50:1+) dimming application. the resultant ?burst drive? that energizes the lamp was designed specifically to ensure 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. a 5v input inverter is also available (lxmg1617-05-6x). the modules design is based on microsemi?s new lx1689 backlight controller, which provides a number of cost and performance advantages due to the controller?s high level of integration. 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 ? fixed frequency operation ? output short-circuit protection and automatic strike-voltage regulation and timeout ? rangemax wide range dimming ? rated from -20 to 70c ? ul60950 e175910 ? rohs compliant applications ? notebook and sub-notebook ? portable instrumentation ? desktop displays ? industrial display controls benefits ? smooth, flicker free 2%-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 1 2 3 w u niversal d imming i nput " pwm ", v dc , or p otentiometer dc voltage source potentiometer pwm signal s electable m aximum o uput c urrent 5m a to 8m a rms package order info p art n umber o utput c onnector i nverter m ates d irectly to p anel c onnectors lxmg1617-12-61 jst sm02(8.0)b-bhs-1-tb(lf)(sn) or yeon ho 20015wr-05a00 jst bhr-03vs-1 lxmg1617-12-62 jst sm02b-bhss-1-tb(lf)(sn) or yeon ho 35001wr-02a00 jst bhsr-02vs-1 l l x x m m g g 1 1 6 6 1 1 7 7 - - 1 1 2 2 - - 6 6 x x
p roduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 2 copyright ? 2002 rev. 1.1, 2006-11-13 www. microsemi . com panelmatch? LXMG1617-12-6X 12v 6w ccfl programmable inverter module tm ? absolute maximum ratings (note 1) input signal voltage (v in1 ).............................................................................................................................. .......-0.3v to 15v input po wer .................................................................................................................... ................................................ 8.25w output volta ge, no load ........................................................................................................ .... internally limited to 1800v rms output curr ent ................................................................................................................. ............10ma rms (internally limited) output power ................................................................................................................... ................................................ 6.0w input signal voltage ( sleep input) ..................................................................................................................... -0. 3v to v in1 input signal vo ltage (bri te) ................................................................................................... ............................-0.3v to 5.5v ambient operating temper ature, zero airflow.................................................................................... .................-20c to 70c 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) 10.8 12 13.2 input supply voltage range (functional) v in1 10.2 12 13.8 v output power p o 6.0 w linear brite control input voltage range v brt_adj 0.5 2.0 v lamp operating voltage v lamp 545 640 735* v rms lamp current (full brightness) i olamp 5 8 ma rms operating ambient te mperature range t a -20 70 c * total output power must not exceed 6w. higher voltage la mps may require maximum output current to be set lower than 8ma rms 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. LXMG1617-12-6X parameter symbol test conditions min typ max units ` output pin characteristics full bright lamp current i l(max) v brt_adj > 2.0v dc , sleep > 2.0v, v in1 = 12v dc i set1 = ground, i set2 = ground 4.4 5 5.6 ma rms full bright lamp current i l(max) v brt_adj > 2.0v dc , sleep > 2.0v, v in1 = 12v dc i set1 = ground, i set2 = open 5.4 6 6.6 ma rms full bright lamp current i l(max) v brt_adj > 2.0v dc , sleep > 2.0v, v in1 = 12v dc i set1 = open, i set2 = ground 6.4 7 7.6 ma rms full bright lamp current i l(max) v brt_adj > 2.0v dc , sleep > 2.0v, v in1 = 12v dc i set1 = open, i set2 = open 7.4 8 8.6 ma rms min. average lamp current i l(min) v brt_adj 0.5v dc , sleep > 2.0v, v in1 = 12v dc i set1 = i set2 = ground 0.30 ma rms lamp start voltage v ls -20c < t a < 70c, v in1 > 10.8v dc 1400 1650 v rms operating frequency f o v brt_adj = 2.5v dc , sleep > 2.0v, v in1 = 12v 57 60 63 khz burst frequency f burst output burst frequency 222 234 246 hz e e l l e e c c t t r r i i c c a a l l s s
p roduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 3 copyright ? 2002 rev. 1.1, 2006-11-13 www. microsemi . com panelmatch? LXMG1617-12-6X 12v 6w 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. LXMG1617-12-6X parameter symbol test conditions min typ max units ` brite input v brt_adj = 0v dc -300 a dc input current i brt v brt_adj = 3v dc 50 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 0.4 0.5 v dc ` sleep input run mode sleep v 2.0 5 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 = 12v dc , sleep < 0.8v 0.0 8 50 a dc run current i run v in1 = 12v dc , sleep 2.0v, i set1 = open i set2 = ground, v lamp = 640v rms 428 ma dc efficiency v in1 = 12v dc , sleep 2.0v, i set1 = open i set2 = ground, v lamp = 640v rms 88 % 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 (10.8v < v in1 < 13.2v) cn1-3 cn1-4 gnd power supply return cn1-5 sleep on/off control. (0v < sleep < 0.8 = off, sleep >= 2.0v = on cn1-6 brite brightness control (0.5v 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 lxmg1617-12-61 and -62 (jst sm02(8.0)b-bhs-1-tb(lf)(sn) | yeon ho 20015wr-05a00 or sm02b-bhss-1- tb(lf)(sn) | yeon ho 35001wr-02a00) cn2-1 v hi high voltage connection to high side of lamp. c onnect to lamp terminal with shortest lead length. do not connect to ground. cn2-2 v lo connection to low side of lamp. connect to lamp terminal with longer 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 roduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 4 copyright ? 2002 rev. 1.1, 2006-11-13 www. microsemi . com panelmatch? LXMG1617-12-6X 12v 6w ccfl programmable inverter module tm ? table 1 output current settings set 1 (pin 7) set 2 (pin 8) nominal output current open* open* 8.0ma open* ground 7.0ma ground open* 6.0ma ground ground 5.0ma * if driven by a logic signal it should be open collector or open drain only, not a voltage source. physical dimensions LXMG1617-12-6X 1.0mm 0.0394in. weight: (9g) typ . 7.5mm max 0.295in. warning high voltage present at high side of transformer and output connector 100mm 3.94in. g rounded m ounting h ole 2.44mm .08 dia . cn1 cn2 11mm 0.433in. 3.5mm 0.138in. 16mm 0.63in. 85mm 3.35in 12.5mm 0.492in x m ounting h ole 2.44mm .08 dia . pcb tolerances 0.2mm , m2 or 2-56 recommended mounting screws 74mm 0.2mm 2.91in r1.0 9mm 0.2 0.354in. x all dimensions are in millimeters, inches for reference only. simplified block diagram ramp gen transformer driver 0.5 - 2v dc + - lamp v lo v hi comparator ramp v brite set 1 high voltage transformer i sense ov sense set 2 +3v 10k 10k +3v +3v v in1 oc sense 10k controller lxm1617 family p p a a c c k k a a g g e e d d a a t t a a
p roduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 5 copyright ? 2002 rev. 1.1, 2006-11-13 www. microsemi . com panelmatch? LXMG1617-12-6X 12v 6w ccfl programmable inverter module tm ? typical application LXMG1617-12-6X 12v set 2 gnd v hi v lo brite v in1 sleep set 1 0.45v to 2.0v 1.8k 20k dac or pot ccfl tube nc nc figure 1 ? brightness control (output current set to maximum) p.w. 10s to 125s brite LXMG1617-12-6X 0 < p.w. < 100% of period pwm signal from system figure 1a ? pwm brightness control LXMG1617-12-6X set 2 gnd v hi v lo sleep set 1 ccfl tube brite 12v v in1 l l 5.0ma rms l h 6.0ma rms h l 7.0ma rms h h 8.0ma 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 digita l pot or 20k manual pot. the inverter contains an internal 10k pull-up to 3v to bias the pot add a 1.8k resistor to se t the lower threshold voltage. a 3.3v logic level pwm signa l 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 sleep input. ? connect v hi to high voltage wire from the lamp. connect v lo to the low voltage wire (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 manufactures. generally the best lamp lifetime correlates with driving the ccfl at the manufactures 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 a 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 i nputs 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 users responsibility since not all lamps are designed to be overdriven. ? the inverter has a built in fault timeout function. if the output is open (lamp disconnected or broken) or shorted the inverter will attempt to strike the lamp for several seconds. after about 2 to 4 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 roduction d atasheet microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 6 copyright ? 2002 rev. 1.1, 2006-11-13 www. microsemi . com panelmatch? LXMG1617-12-6X 12v 6w 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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