p roduction d ata s heet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 1 copyright ? 2010 rev. 1.0, 2010-12-23 www. microsemi . com r r a a n n g g e e m m a a x x ? ? s s t t a a y y l l i i t t ? ? LXMG1645-12-5X 12v quad 5w ccfl inverter module tm ? l l x x m m g g 1 1 6 6 4 4 5 5 - - 1 1 2 2 - - 5 5 x x description the lxmg1645-12-51 and lxmg1645- 12-52 are quad 5w output ccfl (cold cathode fluorescent lamp) inverter modules specifically designed for driving 15? to 18?quad lamp lcd panels. the inverters include two dimming inputs that provide brightness control, v_brite and p_brite. a voltage on v_brite pin adjusts the lamp current amplitude with 0v providing maximum brightness. the p_ brite input accepts a low frequency pwm signal which directly controls the lamp drive waveform. this pwm rangemax? digital dimming technique provides flicker-free brightness control over a wide range (typically 50:1+). the maximum output current is externally programmable using the set 1 and set 2 pins on the input connector over a range of 6ma to 7.5ma in 0.5ma steps. this allows the inverter to be properly matched to a wide array of lcd panel lamp current specifications, a function which we call panelmatch?. in addition the inverter has a dedicated v_status pin that indicates a fault has occurred such as an open or shorted lamp. v_status is an open drain configuration whose output is low during normal operation. when one or more lamps sustain a fault the other lamp(s) will continue to operate and the v_status pin will toggle high. this mode of operation during lamp(s) failure is called staylit? since the panel is able to still remain on although at reduced brightness. other benefits of this new topology are stable fixed-frequency operation and secondary-side strike-voltage regulation. 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 ? staylit? redundancy ? panelmatch? adjustable output current ? v_status fault output ? dual brightness control inputs ? rangemax? wide range dimming ? output short-circuit protection and automatic strike-voltage regulation ? fixed frequency operation ? rated from -30 to 80c ? ul 60950 pending ? rohs compliant applications ? high brightness displays ? desktop displays ? medical monitors benefits ? smooth, flicker free 10- 100% full-range brightness control ? product highlight lxmg1645-12-51 123 w 4 123 w 4 123 w 4 hi hi lamp current programmable from 6ma to 7.5ma per lamp in 0.5ma steps lamp fault signal 123 w 4 hi hi t wo d imming i nputs - pwm" and v dc , or p otentiometer package order info p art n umber o utput c onnectors i nverter m ates d irectly to p anel c onnectors lxmg1645-12-51 four jst sm02(8.0) b-bhs-1-tb(lf)(sn) or yeon ho 20015wr-05a00 or equivalent connectors jst bhr-03vs-1 or equivalent connectors lxmg1645-12-52 four jst sm02b-bhss-1-tb(lf)(sn) or yeon ho 35001wr-02a00 or equivalent connectors jst bhsr-02vs-1 or equivalent connectors
p roduction d ata s heet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 2 copyright ? 2010 rev. 1.0, 2010-12-23 www. microsemi . com r r a a n n g g e e m m a a x x ? ? s s t t a a y y l l i i t t ? ? LXMG1645-12-5X 12v quad 5w ccfl inverter module tm ? l l x x m m g g 1 1 6 6 4 4 5 5 - - 1 1 2 2 - - 5 5 x x absolute maximum ratings input signal voltage (v in, enable ) ...................................................................................................................... -0.3v to 15v input signal voltage (v_statu s with series resist or) .......................................................................... ..............-0.3v to 30v input po wer ................................................................................................................... ................................................. 26.4w output volta ge, no load ....................................................................................................... .................................... 1900v rms output current (each ou tput) .................................................................................................. ...................................... 9.0ma output power (e ach output) .................................................................................................... ........................................ 6.0w input signal voltage (v_brite, p_brite, set 1 , set 2 ) .....................................................................................-0.3v to 5.5v ambient operating temper ature, zero airflow ................................................................................... ................ -30c to 85c operating relative humi dity, non-co ndensing ................................................................................... .................. 0% to 95% storage temperat ure ra nge ..................................................................................................... ......................... -40c to 90c exceeding these ratings could cause damage to the device. all voltages are with resp ect to ground. currents are positive 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, may not function optimally. parameter symbol recommended operating conditions units min r.c. max input supply voltage range (fully regulated lamp current) v in 10.8 12 13.2 v output power (each output) p o 3.6 5.5 w dc brite control input voltage range v brt 0 2.5 v direct low frequency pwm duty control range f duty 10 100 % burst frequency 1 f pwm 100 120 250 hz amplitude v pwm 3.0 5.5 v rise/fall time t r , t f 0 3 s lamp current (full brightness) i o100 6 7.5 ma rms lamp operating voltage v lamp 510 600 690 v rms operating ambient temperature range t a -20 80 c operating humidity range ( non-condensing) rh a 0 95 % 1 direct low burst pwm frequency should be selected such to not have optical interference. at input voltages below 12v the invert er may not be able to output the full 7.5ma rms at the maximum lamp voltage.
p roduction d ata s heet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 3 copyright ? 2010 rev. 1.0, 2010-12-23 www. microsemi . com r r a a n n g g e e m m a a x x ? ? s s t t a a y y l l i i t t ? ? LXMG1645-12-5X 12v quad 5w ccfl inverter module tm ? l l x x m m g g 1 1 6 6 4 4 5 5 - - 1 1 2 2 - - 5 5 x x electrical characteristics unless otherwise specified, the following sp ecifications apply over the recommended operating condition and ambient temperature of 0 c to 60 c except where otherwise noted; v in = 12v, enable > 2.1v, v _brite = 0v or 0 ? , p_brite = 100% or open parameter symbol test conditions / comment min typ max units output characteristics full bright lamp current (each lamp) i olmaxhh set 1 = open, set 2 = open 7.0 7.5 8.0 ma rms i olmaxhl set 1 = open, set 2 = ground 6.5 7.0 7.5 i olmaxlh set 1 = ground, set 2 = open 6.0 6.5 7.0 i olmaxll set 1 = ground, set 2 = ground 5.5 6.0 6.5 full dim lamp current (each lamp) i olvminhh set 1 = open, set 2 = open, v_brite = 2.5v 2.15 ma rms i olvminhl set 1 = open, set 2 = ground, v_brite = 2.5v 2.00 i olvminlh set 1 = ground, set 2 = open, v_brite = 2.5v 1.85 i olvminll set 1 = ground, set 2 = ground, v_brite = 2.5v 1.65 i olpminhh set 1 = open, set 2 = open, p_brite = 10% 1.95 i olpminhl set 1 = open, set 2 = ground, p_brite = 10% 1.80 i olpminlh set 1 = ground, set 2 = open, p_brite = 10% 1.65 i olpminll set 1 = ground, set 2 = ground, p_brite = 10% 1.50 lamp start voltage (each lamp) v l_stk0 t a = 0c, v in > 10.8v 1820 v rms v l_stk25 t a = 25c, v in > 10.8v 1720 v rms operating frequency f o 45.5 47.5 48.0 khz v_brite optical dim range n:1 _vbrt center area brightness, full/min, t a = 25 43 ratio p_brite optical dim range n:1 _pbrt center area brightness, full/min, t a = 25 47 ratio output current lamp to lamp deviation i ol m,n m i n i m i ol ol ol ? m = 1,2,3,4, n = 1~4 not m 5 % v_brite input, vdc input bias current i vbrt v_brite = 0v or 0 107 a v_brite = 2.5v or 50k 52 brite adjust voltage range v brt i olmaxx 0 0.2 v i olvminx 2.5 % brt_pwm minimum p_brite control duty, v_brite = 2.5v 11 15 % brite adjust resistor range r brt(k ) i olmaxx 0 2 k ? i olvminx 50 % brt_pwm minimum p_brite control duty, r_brite = 50k 9 11 13 % brite burst mode frequency f brt_pwm v_brite > 0.3v 2.5v 120 142 165 hz p_brite input, pwm pwm high level amplitude v pwmh 3 5 v pwm low level amplitude v pwml 0 0.3 v
p roduction d ata s heet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 4 copyright ? 2010 rev. 1.0, 2010-12-23 www. microsemi . com r r a a n n g g e e m m a a x x ? ? s s t t a a y y l l i i t t ? ? LXMG1645-12-5X 12v quad 5w ccfl inverter module tm ? l l x x m m g g 1 1 6 6 4 4 5 5 - - 1 1 2 2 - - 5 5 x x electrical characteristics unless otherwise specified, the following sp ecifications apply over the recommended operating condition and ambient temperature of 0 c to 60 c except where otherwise noted; v in = 12v, enable > 2.1v, v _brite = 0v or 0 ? , p_brite = 100% or open parameter symbol test conditions / comment min typ max units pwm jitter jitter 3 s pwm frequency range f pwm 100 120 250 hz pwm duty range % pwm 10 100 % enable input disable off v en_off 0 0.8 v enable on v en_on 2.1 v in v enable bias current i en_on enable = 2.1v (68k ? pull-up 12v in ) 150 a v in quiescent current i_ q enable 0.8v 230 a power characterisitics v in under voltage lock out threshold v in uvlo v in rising edge 10.6 v v in uvlo hysteresis v hys 350 mv supply current i run no lamp fault condition, i lamp = 6.0ma 1.37 1.75 a supply current during fault timeout i fault all four lamps open 32 ma efficiency load = 100k resistive load 85 90 % strike timeout strike (all open lamps) t s_dwell all four lamps open 1650 ms open lamp output voltage v stk 1650 v rms v_status pin v_status pin max voltage v status_max 750 series resistor to voltage source 30 v v_status pin leakage current i status_lkg fault, v_status pull-up 750 to v in 155 a v_status pin max sink current i status_snk no fault, v_status pull-up 750 to v in 0.4 v v_status invalid time power on t strike enable to v_status = low 2.5 sec v_status pin invalid time in run mode t d_flt open lamp(s) to v_status = high 150 275 ms strike mode staylit? strike time period t d_flt only one of two lamps ignited on cn2 ~ cn3 or cn4 ~ cn5 750 ms lamp current during staylit? max lamp current of no-fault side (open) fil1~4a set 1 = open, set 2 = open, one lamp open 7.2 7.7 8.2 ma rms fil1~4b set 1 = open, set 2 = ground, one lamp open 6.7 7.2 7.7 fil1~4c set 1 = ground, set 2 = open, one lamp open 6.2 6.7 7.2 fil1~4d set 1 = ground, set 2 = ground, one lamp open 5.7 6.2 6.7 max lamp current of no-fault side (short) fil1~4a? set 1 = open, set 2 = open, one lamp short 7.3 7.8 8.3 ma rms fil1~4b? set 1 = open, set 2 = ground, one lamp short 6.8 7.3 8.3
p roduction d ata s heet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 5 copyright ? 2010 rev. 1.0, 2010-12-23 www. microsemi . com r r a a n n g g e e m m a a x x ? ? s s t t a a y y l l i i t t ? ? LXMG1645-12-5X 12v quad 5w ccfl inverter module tm ? l l x x m m g g 1 1 6 6 4 4 5 5 - - 1 1 2 2 - - 5 5 x x electrical characteristics unless otherwise specified, the following sp ecifications apply over the recommended operating condition and ambient temperature of 0 c to 60 c except where otherwise noted; v in = 12v, enable > 2.1v, v _brite = 0v or 0 ? , p_brite = 100% or open parameter symbol test conditions / comment min typ max units fil1~4c? set 1 = ground, set 2 = open, one lamp shor t 6.3 6.8 7.3 ma rms fil1~4d? set 1 = ground, set 2 = ground, one lamp short 5.8 6.3 6.8 min lamp current of no-fault side (open) il1~4e set 1 = open, set 2 = open, v_brite = 2.5v, one lamp open 2.20 ma rms il1~4f set 1 = open, set 2 = ground, v_brite = 2.5v, one lamp open 2.05 il1~4g set 1 = ground, set 2 = open, v_brite = 2.5v, one lamp open 1.90 il1~4h set 1 = ground, set 2 = ground, v_brite = 2.5v, one lamp open 1.70 min lamp current of no-fault side (short) il1~4e? set 1 = open, set 2 = open, v_brite = 2.5v, one lamp short 2.25 ma rms il1~4f? set 1 = open, set 2 = ground, v_brite = 2.5v, one lamp short 2.10 il1~4g? set 1 = ground, set 2 = open, v_brite = 2.5v, one lamp short 1.95 il1~4h? set 1 = ground, set 2 = ground, v_brite = 2.5v, one lamp short 1.87 1 enable should be pull up from v in using 68k , with open collector or open drain functional pin description c onn p in d escription cn1 (molex 053261-1071 or equivalent ) cn1-1, cn1-2 v in main input power supply 10.8v to13.2v cn1-3, cn1-4 gnd power supply return cn1-5 enable on/off control. on: pull-up 68k from v in and oc or od or 2.1v, off: 0 ~ 0.8v cn1-6 v_brite analog brightness control (0v to 2.5v), 0v = full brightness, 2.5v = min brightness resistor 0 ~ 50k (max ~ min brightness), no connection to p_brite to use v_brite option cn1-7 p_brite low frequency burst pwm dimming input, connection to p_brite overrides v_brite option cn1-8 v_status fault status output: normal state: low, fail stat e : high open drain (internally pulled up with 47k cn2, cn3, cn4, cn5 lxmg1645-12-51 (jst sm02(8.0)b-bhs-1-tb(lf)(sn) or yeon ho 20015wr-05a00 or equivalent) lxmg1645-12-52 (jst sm02b-bhss-1-tb(lf)(sn) or yeon ho 35001wr-02a00 or equivalent) cn2-1 to cn5-1 lamp 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 to cn5-2 lamp lo low voltage connection to return side of lamp. connect lamp terminal with longer lead length. do not connect to ground.
p roduction d ata s heet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 6 copyright ? 2010 rev. 1.0, 2010-12-23 www. microsemi . com r r a a n n g g e e m m a a x x ? ? s s t t a a y y l l i i t t ? ? LXMG1645-12-5X 12v quad 5w ccfl inverter module tm ? l l x x m m g g 1 1 6 6 4 4 5 5 - - 1 1 2 2 - - 5 5 x x staylit function table fault definition: (f) 1. open : ( o ) lamp is not connected (either high side wire open or return wire open) 2. short1 : ( s1 ) lamp high side wire is shorted to lamp return side wire 3. short2 : ( s2 ) lamp high side wire is shorted to ground 4. short3 : ( s3 ) lamp return wire is shorted to gnd 5. arcing: lamp high side wire is creating the arcing path after the inverter is enabled. f means either o, s1, s2, or s3 fault condition n = connected lamp and normal operation fault conditions inverter operation v_status signal lamp 1 lamp 2 lamp 3 lamp 4 fault exists prior to turn-on fault occurs during ignition fault occurs during run mode n n n n all on action after t strike action after t strike action after t d_flt n n n f with exception of affected lamps for ? o, s1, s2 ? fault conditions, all unaffected lamps are on , including affected lamp in a single s3 fault condition. an s1 fault will typically reduce opposing operational lamp current by 38% low to high low to high low to high n n f n n n f f n f n n n f n f n f f n n f f f f n n n f n n f f n f n f n f f f f n n f f n f f f f n f f f f all off other fault protection operation fault condition protection methods board internal short, v_status always high and operates or fail safe operates if not fault shutdo wn, fuse protected if over current from v in
p roduction d ata s heet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 7 copyright ? 2010 rev. 1.0, 2010-12-23 www. microsemi . com r r a a n n g g e e m m a a x x ? ? s s t t a a y y l l i i t t ? ? LXMG1645-12-5X 12v quad 5w ccfl inverter module tm ? l l x x m m g g 1 1 6 6 4 4 5 5 - - 1 1 2 2 - - 5 5 x x v_status timing diagram enable interface from system side (note 1 above) mechanical dimensions 150mm 0.5 5.906 in. 10.5mm max 0.413in. weight: 49g typ. pcb tolerances 0.2mm, unless otherwise noted g rounded m ounting h ole 3.5 mm .08 dia. 3 holes warning high voltage is present at high side of each transformer , its core and the high side of the output connector pins, please provid e at least 3 mm clearance (in all directions) on the component side of the board to any conductor when mounting. 3mm 44 mm 1.732 in. 3mm 0.118 in. 50mm 0.5 1.969in. m ounting h ole 3.5 mm .08 dia. x 1 microsemi 144mm 5.669 in. w cn4 w cn5 w w cn3 cn2 cn1 2.5mm max 0.098in. 1.2mm 0.047in. 15mm max 0.591in.
p roduction d ata s heet microsemi analog mixed signal group 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 8 copyright ? 2010 rev. 1.0, 2010-12-23 www. microsemi . com r r a a n n g g e e m m a a x x ? ? s s t t a a y y l l i i t t ? ? LXMG1645-12-5X 12v quad 5w ccfl inverter module tm ? l l x x m m g g 1 1 6 6 4 4 5 5 - - 1 1 2 2 - - 5 5 x x 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.
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