p roduction d atasheet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 1 copyright ? 2007 rev. 1.1, 2010-02-26 www. microsemi . com panelmatch? lxmg1617a-05-6x 5v 6w ccfl programmable inverter module tm ? description the lxmg1617a-05-6x is a single output 6w direct drive? ccfl (cold cathode fluorescent lamp) inverter module designed for driving lcd backlight lamps. it is typically ideal for driving 12.1? to 15? tft panels. lxmg1617a modules provide the designer with a superior display brightness range. this brightness range is achievable with virtually any lcd display. the maximum output current is externally programmab le over a range of 5ma 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. the resultant ?burst drive? that energizes the lamp was designed to ensure that no premature lamp degradation occurs, while allowing significant power savings at lower dim levels. the module converts a dc voltage from the system battery or ac adapter directly to high frequency, high-voltage waves required to ignite and operate ccfl lamps. a 12v input inverter is also available (lxmg1617a-12-6x). the lxmg1617a modules integrate the newer highly integrated lx1691b ccfl backlight controller to provide wider dimming range (typically 100:1+) and wider temperature range (-30c to 80c) compared to the existing solutions offered by microsemi. other benefits of the inverter?s topology include stab le fixed-frequency operation, secondary-side strike voltage regulation and both open/shorted lamp protection with fault timeout. the new lxmg1617a (?a series?) modules are designed therefore as a higher performance near drop-in- replacement (see brite minimum input voltage level) for those customers and applications currently using the lxmg1617 inverters. 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 -30c to 80c ? ul60950 e175910 ? rohs compliant applications ? medical instrument displays ? 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 5 m a rms to 8 m a rms package order info p art n umber o utput c onnector i nverter m ates d irectly to p anel c onnectors lxmg1617a-05-61 jst sm02(8.0)b-bhs-1-tb(lf)(sn), yeon ho 20015wr-05a00 or equivalent jst bhr-03vs-1 lxmg1617a-05-62 jst sm02b-bhss-1-tb(lf)(sn), yeon ho 35001w r-02a00 or equivalent jst bhsr-02vs-1 l l x x m m g g 1 1 6 6 1 1 7 7 - - 0 0 5 5 - - 6 6 x x
p roduction d atasheet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 2 copyright ? 2007 rev. 1.1, 2010-02-26 www. microsemi . com panelmatch? lxmg1617a-05-6x 5v 6w ccfl programmable inverter module tm ? absolute maximum ratings (note 1) input signal voltage (v in ) .............................................................................................................................. ..........-0.3v to 6v input po wer .................................................................................................................... ................................................ 8.25w output volta ge, no load ........................................................................................................ .... internally limited to 1900v rms output curr ent ................................................................................................................. ............10ma rms (internally limited) output power ................................................................................................................... ................................................ 6.0w 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.................................................................................... .................-30c to 80c 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 in 4.5 5 5.5 v output power p o 6.0 w linear brite control input voltage range v brt_adj 01 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 -30 80 c 1 the brite minimum input voltage level is 0v, whereas it is 0.5v in the original lxmg1617-05-6x inverter, see application info o n page 5. * total output power must not exceed 6w. higher voltage lamps ma y require maximum output current to be set lower than 8ma rms electrical characteristics the following specifications apply over the recommended operating condition and ambient temperature of 0c to 60 c except where otherwise noted. lxmg1617a-05-6x parameter symbol test conditions min typ max units ` output pin characteristics full bright lamp current i l(max) v brt_adj 2.0v, sleep 2.0v, v in = 5v 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, sleep 2.0v, v in = 5v 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, sleep 2.0v, v in = 5v 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, sleep 2.0v, v in = 5v i set1 = open, i set2 = open 7.4 8 8.6 ma rms min. average lamp current i l(min) v brt_adj = 0v, sleep 2.0v, v in = 5v i set1 = i set2 = gnd i l(min) = i l(max) * (min duty ratio) 0.6 ma rms lamp start voltage v ls -30c < t a < 80c, v in > 4.75v 1500 1650 v rms operating frequency f o v brt_adj = 2.0v, sleep 2.0v, v in = 5v 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 analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 3 copyright ? 2007 rev. 1.1, 2010-02-26 www. microsemi . com panelmatch? lxmg1617a-05-6x 5v 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 0c to 60 c except where otherwise noted. lxmg1617a-05-6x parameter symbol test conditions min typ max units ` brite input v brt_adj = 0v -13 a dc input current i brt v brt_adj = 3v 0 a dc minimum input for max. lamp current v brt_adj i o(lamp) = maximum lamp current 1.9 2 v maximum input for min. lamp current2 v brt_adj i o(lamp) = minimum lamp current 0 v minimum pwm input frequency f brt_pwm 2 khz ` sleep bar input run mode sleep v 2.0 v in v sleep mode sleep v -0.3 0.8 v ` set 1,2 input set 1,2 low threshold v l 0.4 v input current i set v set = 0v -220 a ` power characteristics sleep current i in(min) v in = 5v, sleep 0.8v 5 50 a run current i run v in = 5v, sleep 2.0v, i set1 = open i set2 = ground, v lamp = 640v rms 1090 ma run current ripple voltage i ripple v in = 5v, sleep 2.0v, i set1 = open i set2 = ground, v lamp = 640v rms 330 mvpp efficiency v in = 5v, sleep 2.0v, i set1 = open i set2 = ground, v lamp = 640v rms 85 % 2 the brite minimum input voltage level is 0v, whereas it is 0.5v in the original lxmg1617-05-6x inverter, see application info o n page 5. 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 in main input powe r supply (4.75v v in 5.25v) 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 (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 lxmg1617a-05-61 and -62 (jst sm02(8.0)b-bhs-1-tb(lf)(sn) ; yeon ho 20015wr-05a00, sm02b-bhss-1- tb(lf)(sn) ; yeon ho 35001wr-02a00) or equivalent 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 analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 4 copyright ? 2007 rev. 1.1, 2010-02-26 www. microsemi . com panelmatch? lxmg1617a-05-6x 5v 6w ccfl programmable inverter module tm ? table 1 setting output current 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 lxmg1617a-05-6x 1.0mm 0.1 0.0394in. weight: (9g) typ . 7.5mm max 0.295in. 100mm 3.94in. g rounded m ounting h ole 2.44 mm .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 2.44 mm .08 dia. pcb tolerances 0.5mm , m2 or 2-56 recommended mounting screws 74mm 0.2mm 2.91in r1.0 9mm 0.2 0.354in. x warning high voltage is present at high side of transformer, its core and the high side of the output connector, please provide at least 3 mm clearance (in all directions) on the component side of the board to any conductor when mounting all dimensions are in millimeters, inches for reference only simplified block diagram ramp gen transformer driver 0 to 2v + - lamp v lo v hi comparator ramp v brite set 1 high voltage transformer i sense ov sense set 2 10k +3v +3v v in oc sense 10k controller +3v 215k 10.0k 1f 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 analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 5 copyright ? 2007 rev. 1.1, 2010-02-26 www. microsemi . com panelmatch? lxmg1617a-05-6x 5v 6w ccfl programmable inverter module tm ? typical application lxmg1617a-05-6x 5v set 2 gnd v hi v lo brite v in sleep set 1 0v to 2.0v 500k dac or pot ccfl tube nc nc figure 1 ? brightness control (output current set to maximum) p.w. 10s to 500s brite lxmg1617a-05-6x 0 < p.w. < 100% of period pwm signal from system figure 1a ? pwm brightness control lxmg1617a-05-6x set 2 gnd v hi v lo sleep set 1 ccfl tube brite 5v v in 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 digital pot or 500k manual pot. the inverter contains an internal 215k pull-up to 3v to bias the pot, if desired; add a resistor to set the lower threshold voltage above the absolute minimum dim level capability. a pwm logic level signal (figure 1a) may be used up to 5v; however the inverter will reach maximum current at less than 100% duty cycle. this can be calculated as approximately 2v divided by the logic high voltage level; w ith 3.3v logic level this corresponds to about 60% duty cycle for maximum lamp current. ? if you need to turn the inverter on/off remotely, connect to ttl logic signal to the slee p 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 manufacturers. generally the best lamp lifetime correlates with driving the ccfl at the manufacture?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 designed such that just leaving them open or grounding them is all 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 example in nighttime situations. in conjunction with a light sensor or other timer the panel could be set to higher brightness (maximum output current) for daytime illumination and lower brightness (minimum or typical output current) at nighttime. since the dim ratio is a factor of both the burst duty cy cle and the peak output current, using this technique the effective dim ratio can be increased greater than the burst duty cy cle 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 the output is open (lamp disconnected or broken) or shorted the inverter will attempt to strike the lamp up to about one second, after which (without success) the inverter will shutdown, in this mode the inverter will draw about 8ma from v in . in order to restart the inverter it is necessary to toggle the sleep input or cycle the v in 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 analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 6 copyright ? 2007 rev. 1.1, 2010-02-26 www. microsemi . com panelmatch? lxmg1617a-05-6x 5v 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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