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MICROSEMI LXMG1626-05-45 PanelMatch StayLit PRODUCTION DATASHEET

1. x If you need to turn the inverter ON OFF remotely connect Eaa to TTL logic signal to the SLEEP input 1 LXMG1626 05 45 le ae ALT HB Vio Connect Vyn and Vyp to high voltage wires from the e e lamps Connect Vio to the low voltage wire lamp return NC NC wire with thinner insulation Never connect V to circuit ground as this will defeat lamp current regulation z Use the SET input to program the desired maximum output current Generally the best lamp lifetime correlates with driving the CCFL at the manufactures nominal current setting Figure 1 Brightness Control Output current set to maximum PWM Signal from System BRITE z Typically the SET pin is permanently wired to ground or intentionally left open However it can also be actively driven using an open collector or open drain logic signal This will allow dynamic adjustment of 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 dimming ratio is a e factor of both the burst duty cycle and the peak output BRITE Vin Vun i current by using this technique the effective dim ratio can Vu be increased greater than what the burst duty cycle
2. OUTPUT POWOM A S 6W Input Signal Voltage SLEEP InpUt 2 7 oiii cuoc Ine Rate estas a Aaaa Ra aided ei POE Reo ERE ud 0 3V to 5 5V Input Signal Voltage BRITE Sr 0 3V to 5 5V Ambient Operating Temperature zero airflow ssssssssssssssssesseeeeeeene nennt n nnen nennen sre nnn nnns 30 C to 80 C Operating Relative Humidity non condensing c ccceeeeeeeeeee cece eect eeeeeeaeeeeeeesecaaeaeceeeeeeeeseeaaeaeseseseeeaeeeeeeeseseecaeaeeseeees lt 90 Storage Temperature RAnge c ccccceceeeeeeeeceeeeeeeeeneaeeeeeeeeeeeeeaaeaeeeeeeeseeaaaaeeeeeeeseeeaeeeeeeeseeeeeeeeeseesaeaeeeeeeneees 40 C to 85 C Note 1 Exceeding these ratings could cause damage to the device All voltages are with respect to Ground Currents are positive into negative out of specified terminal RECOMMENDED OPERATING CONDITIONS R C This module has been designed to operate over a wide range of input and output conditions However best efficiency and performance will be obtained if the module is operated under the condition listed in the R C column Min and Max columns indicate values beyond which the inverter although operational will not function optimally a Parameter Symbol Min __ R C Max Input Supply Voltage Range Fully Regulated Lamp Current VIN bd 3 2A V Input Supply Voltage Range Functional 4 5 5 5 5 Output Power Po 4 5 5 5 W Line
3. amp Microsemi TM DESCRIPTION The LXMG1626 05 45 is a Dual 6W Output Direct Drive CCFL Cold Cathode Fluorescent Lamp Inverter Module specifically designed to be compatible with variety of LCD panels that have both lamps on one side of the panel and use a single common lamp return wire 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 at either 10mA or 12mA 5mA or 6mA per lamp 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 inverter also has a dedicated FAULT pin that indicates an open shorted lamp condition In addition when only one of the two lamps in the LCD fails open the second lamp will continue to operate with a FAULT signal toggling to indicate the failed condition StayLit feature RangeMAX Digital Dimming Technique provides flicker free brightness control in any wide range typically 100 1 dimming application The resultant burst drive that energizes the lamp is designed specificall
4. DIMENSIONS LXMG1626 05 45 UNPLATED MOUNTING HOLE 3MM x 0 1 DIA 113mm 6MM HEAD CLEARANCE BOTH HOLES 4 45in CN1 83mm x 0 2 30mm 22mm 102 3 27in 1 181in d 0 866in mmm 4 0mm Vn 0 157in latom GROUNDED MOUNTING 0 630in HOLE 3MM 0 1 DIA 1 0mm EE 0 0394in 5mm i 0 265in jl c p ea Max weight EI Outside PCB tolerances 0 5mm 4 40 recommended mounting screws SIMPLIFIED BLOCK DIAGRAM FBV E i High Voltage 215K A ij Transformer L Vu Vu parator ii e BRITE i L H it 0 2Vpc LA 10K Ramp ___ Transformer i E AN Driver IBE p Eg Ramp 3 3 2 Gen OK Ee e SET 5V OVsenseE One of two 3K ISENSE eS ee ee 10K Vio FAULT oa Copyright 2005 Microsemi Page 4 Rev 1 0 2007 01 24 Integrated Products 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 d O P e rm J gt PRODUCTION DATASHEET b TYPICAL APPLICATION Ez 7 The brightness control may be a voltage output DAC or Pot e BRITE Vin other voltage source a digital pot or 500K manual pot The We 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 e Vu
5. alone LXMG1626 05 45 could provide Conversely the SET input could be used to overdrive the lamp current Of course any possible degradation of lamp life from such practices is the user s SET FAULT GND Vio responsibility since not all lamps are designed to be under e e or overdriven P W LXMG 1626 05 45 10ps to 200S 0 P W 100 of period Figure 1A PWM Brightness Control 5V SLEEP Input connector CN1 8 FAULT signal which is normally low will toggle high to indicate that an output fault condition has occurred as summarized in the table to the left Lamp s Status FAULT Inverter Operation figure 2 FAULT will toggle high if one or both lamps are Normal Low Normal full lamp open or short circuited If only one lamp opens or its high Operation current side is shorted to ground then the other lamp should One Lamp High Normal lamp continue to operate with the FAULT signal going high If Open current both lamps open and or both lamps are shorted the FAULT Both Lamps High Shutdown will toggle high if it is not already high and the inverter 2 Open output will shutdown Also if either low side connection of d One Lamp High Normal lamp the lamps is shorted to ground or the lamps are shorted m Side Short to High current high side to low side FAULT will go high and the inverter Ground will shutdown In order to restart the inve
6. 0uA 2 9 3 1 V n FAULT Output Voltage Low FAULTy FAULT 10uA 0 3 0 8 V Copyright 2005 Microsemi Paae 2 Rev 1 0 2007 01 24 9 Integrated Products 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 5V Dual 6W CCFL Programmable Inverter Module PRODUCTION DATASHEET ELECTRICAL CHARACTERISTICS CONTINUED Unless otherwise specified the following specifications apply over the recommended operating condition and ambient temperature of 25 C except where otherwise noted n LXMG1626 05 45 Parameter Symbol Test Conditions gt BRITE INPUT Vert Ap OVpc 13 UApc Input C t Lab wic odd i VaRT ADJ 3Vpc 1 HApc Minimum Input for Max Lamp Current Vanr ap lowamp Maximum Lamp Current 2 0 2 05 Voc Maximum Input for Min Lamp Current Vanr ap lowamp Minimum Lamp Current 0 Voc P SLEEP BAR INPUT Run Mode Vaiggs 2 1 VIN Voc Sleep Mode Vaceep 0 3 0 8 Voc gt SET INPUT SET Low Threshold VL 0 4 V Input Current Iser Vser lt 0 4V 420 yA gt POWER CHARACTERISTICS Sleep Current linin VIN 5Vpc SLEEP lt 0 8V 0 0 12 50 Apc VIN 5Voc SLEEP 2 2 0V lser Ground Run Current lin RUN Vus 435V aus 1090 mApc are VIN 5Vpc SLEEP 2 0V Iser Ground Efficiency n Viae 435Vaus 80 Jo FUNCTIONAL PIN DESCRIPTION CN1 Molex 53261 0871 Mates with 51021 0800 housing 50079 8100 pins Mates with LX9501G input cable assembly ENT VIN Main Input Power Supply 4 75
7. V VIN lt 5 25V CN1 2 Sac GND Power Supply Return CN1 4 CN1 5 SLEEP ON OFF Control OV SLEEP 0 8 OFF SLEEP gt 2 1V ON CN1 6 BRITE Brightness Control 0V to 2 0Vpc 2 0Vpc gives maximum lamp current CN1 7 SET SET Connecting this pin to ground decreases the output current see Table 1 CN1 8 FAULT High Impedance Output that indicates lamp status high indicates fault see figure 2 on page 5 CN2 for LXMG1626 05 45 JST SM03 4 0 B BHS 1 TB LF SN or Yeon Ho 20015WR 07A00 CN2 1 V High voltage connection to high side of lamp Connect to lamp terminal with shortest lead length n DO NOT connect to ground CN2 2 V High voltage connection to high side of lamp Connect to lamp terminal with shortest lead length Hiz DO NOT connect to ground CN2 3 NC No Connect CN2 4 V Connection to low side of lamp Connect to lamp terminal with longer lead length LO DO NOT connect to ground Copyright 2005 Microsemi Page 3 Rev 1 0 2007 01 24 Integrated Products 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 m m m A c A D rm WN E gt M r PanelMatch StayLit LXMG1626 05 45 IC ose I 5V Dual 6W CCFL Programmable Inverter Module TM PRODUCTION DATASHEET OUTPUT CURRENT SETTINGS SET Pin 7 Nominal Output Current Open 12mA Ground 10mA f driven by a logic signal it should be open collector or open drain only not a voltage source PHYSICAL
8. ar BRITE Control Input Voltage Range VBRT_ADJ 0 2 0 V Lamp Operating Voltage VLAMP 385 435 485 Vers Lamp Current Full Brightness per Lamp loLAMP 5 0 6 0 mArms Operating Ambient Temperature Range Ta 20 70 C 1 Based on single lamp voltage measurement At input voltages below 5V the inverter may not be able to output the full 6mAgys per lamp in all configurations ELECTRICAL CHARACTERISTICS Unless otherwise specified the following specifications apply over the recommended operating condition and ambient temperature of 0 C to 60 C except where otherwise noted Parameter Symbol Test Conditions CXMG16026 05 45 Min Typ Max P OUTPUT PIN CHARACTERISTICS Full Bright Lamp Current two lamps luu VERTA Z 20Voc SLEEP 2 2 0V VIN 5Voc 9 10 11 mAaus Ilse Ground Full Bright Lamp Current two lamps luma Maier c SLEEP 2 2 0V VIN 5Voc 11 12 13 mAgus SET Output Current Lamp to Lamp Vert Ap gt 2 0Vpc SLEEP gt 2 0V VIN 5Vpc 5 Fri Deviation mn Iser Open i Vanr Apj OVpc SLEEP gt 2 0V VIN 5Vpc Min A Lamp Current l i ed 1 6 A e sod pcd LMN Eer Ground lour Imax SORT of 96 duty cycle M dd Lamp Start Voltage Vis VIN gt 4 5Vpc 1250 1400 Vnus el E bmi Operating Frequency fo Vert avs 2 0Vpc steep gt 2 0V VIN 5V 55 2 57 6 60 kHz e Burst Frequency faunsT Output Burst Frequency 215 225 235 Hz ca FAULT Output Voltage High FAULTyy FAULT 1
9. rter after a fault it gt Both Lamps is necessary to toggle the SLEEP input or cycle the VIN High Side Short High Shutdown input supply In fault induced shutdown mode the inverter to Ground will draw about 15mA from VIN supply 2 Figure 2 FAULT Output Operation Under some conditions the second lamp will also shutdown this is especially true if the inverter draws an arc going open or when shorted Copyright 2005 Microsemi Page 5 Rev 1 0 2007 01 24 Integrated Products 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 ey M z r m PanelMatch StayLit LXMG1626 05 45 T IC ose I 5V Dual 6W CCFL Programmable Inverter Module PRODUCTION DATASHEET NOTES PRELIMINARY DATA Information contained in this document is pre production data and is proprietary to Microsemi It may not be modified in any way without the express written consent of Microsemi Product referred to herein is offered in pre production form only and may not have completed Microsemi s Quality Assurance process for Release to Production Microsemi reserves the right to change or discontinue this proposed product at any time Copyright 2005 Microsemi Page 6 Rev 1 0 2007 01 24 Integrated Products 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570
10. utput Open amp Short Circuit Protection and Automatic Strike Voltage Regulation and Timeout StayLit Continued Operation with Single Open Lamp Failure Fixed Frequency Operation Fault Output Signal Rated From 30 C to 80 C RoHS Compliant UL60950 E175910 APPLICATIONS Dual lamp LCD s requiring a shared common lamp return Mates to a single JST BHR 04 VS 1 lamp connector 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 FOE IS INVERTER MATES DIRECTLY TO PANEL CONNECTORS JST BHR 04VS 1 Page 1 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 ET as c ip m e N P hi I g ey M z r m PanelMatch StayLit LXMG1626 05 45 T IC ose I 5V Dual 6W CCFL Programmable Inverter Module PRODUCTION DATASHEET gt ABSOLUTE MAXIMUM RATINGS NOTE 1 Input Signal Voltage VIN e EEE 0 3V to 6V Input oy 172 greene ery are are pee err re eee re rere ere Uf cu rr eee n Rd HL EMI 8W Output Voltage no load Internally Limited to 1500Vnys Output Current per lamp 2 coria tec ni ritiene eus toa aa vett aae Vea save n Xen E ERR CR u Ee Toda 6 6mArws Internally Limited
11. y to ensure that no premature lamp degradation occurs while allowing significant power savings at lower dim levels The design utilizes Microsemi s highly integrated LX1691B backlight controller to convert DC voltage from the system battery or AC adapter directly to high frequency high voltage waves required to ignite and operate CCFL lamps 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 PRODUCT HIGHLIGHT DC Voltage Source PWM Signal Potentiometer ELA Lamp Fault Signal UNIVERSAL DIMMING INPUT PWM Voc OR POTENTIOMETER Lamp current 5 or 6mA per Lamp PACKAGE ORDER INFO PART NUMBER OUTPUT CONNECTOR JST SM04 4 0 B BHS 1 TB LF SN or Yeon Ho 20015WR 07A00 LXMG 1626 05 45 Copyright 2005 Rev 1 0 2007 01 24 Microsemi Integrated Products Shh a ZZ HI PRODUCTION DATASHEET PanelMatch StayL it LXMG1626 05 45 5V Dual 6W CCFL Programmable Inverter Module KEY FEATURES Externally Programmable Maximum Output Current Easy to Use Brightness Control RangeMAX Wide Range Dimming O

MICROSEMI LXMG1626-05-45 PanelMatch StayLit PRODUCTION DATASHEET

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