PanelMatch™ 12V Dual 6W CCFL Programmable Inverter Module ® TM LXMG1626-12-46 P RODUCTION D ATASHEET KEY FEATURES DESCRIPTION Externally Programmable Maximum Output Current Easy to Use Brightness Control RangeMAX Wide Range Dimming Output Open & Short-Circuit Protection and Automatic StrikeVoltage Regulation and Timeout Continued Operation with Single Open Lamp failure Fixed Frequency Operation Fault Output Signal Rated From -30°C to 80°C RoHS Compliant UL60950 E175910 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. 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 specifically 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. WWW . Microsemi .C OM The LXMG1626-12-46 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. 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 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 DC Voltage Source PWM Signal 3 2 1 W "PWM", HI UNIVERSAL DIMMING INPUT HI Lamp Fault Signal OUTPUT Microsemi VDC, OR POTENTIOMETER Lamp current 5 or 6mA per Lamp PACKAGE ORDER INFO PART NUMBER OUTPUT CONNECTOR INVERTER MATES DIRECTLY TO PANEL CONNECTORS LXMG1626-12-46 JST SM04(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-07A00 JST BHR-04VS-1 Copyright © 2005 Rev. 1.0, 2007-01-05 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LXMG1626-12-46 4 Potentiometer INPUT PRODUCT HIGHLIGHT PanelMatch™ 12V Dual 6W CCFL Programmable Inverter Module ® TM LXMG1626-12-46 P RODUCTION D ATASHEET Input Signal Voltage (VIN1).....................................................................................................................................-0.3V to 15V Input Power ......................................................................................................................................................................... 8W Output Voltage, no load ............................................................................................................ Internally Limited to 1500VRMS Output Current (per lamp) ...........................................................................................................6.6mARMS (Internally Limited) Output Power ..................................................................................................................................................................... 6W Input Signal Voltage ( SLEEP Input) ..................................................................................................................-0.3V to 13.2V Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V Ambient Operating Temperature, zero airflow.....................................................................................................-30°C to 80°C Operating Relative Humidity, non-condensing ................................................................................................................ ≤ 90% Storage Temperature Range...............................................................................................................................-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. WWW . Microsemi .C OM ABSOLUTE MAXIMUM RATINGS (NOTE 1) 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. Parameter Recommended Operating Conditions Min R.C. Max Symbol Input Supply Voltage Range (Fully Regulated Lamp Current) Input Supply Voltage Range (Functional) Output Power Linear BRITE Control Input Voltage Range Lamp Operating Voltage Lamp Current (Full Brightness, per lamp) Operating Ambient Temperature Range VIN1 PO VBRT_ADJ VLAMP IOLAMP TA 10.8 12 13.2 10.2 12 4.5 13.6 5.5 2.0 420 6.0 80 0 320 5.0 -30 370 Units V W V VRMS¹ mARMS² °C ¹ Based on single lamp voltage measurement. ²At input voltages below 12V the inverter may not be able to output the full 6mARMS 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 LXMG1626-12-46 Min Typ Max Units OUTPUT PIN CHARACTERISTICS IL(MAX) Full Bright Lamp Current (two lamps) IL(MAX) Output Current Lamp to Lamp Deviation ILL%DEV Min. Average Lamp Current Lamp Start Voltage IL(MIN) VLS Operating Frequency fO Burst Frequency fBURST VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET = Ground VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET = Open VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET = Open VBRT_ADJ = 0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET = Ground; IOUT = IMAX * SQRT of % duty cycle VIN1≥ 10.8VDC 1250 1400 VBRT_ADJ = 2.0VDC, 55.2 57.6 60 kHz 215 225 235 Hz 3 3.5 0.8 V Output Burst Frequency FAULT Output Voltage High FAULTVH FAULT = -10uA FAULT Output Voltage Low FAULTVL FAULT = 10uA Copyright © 2005 Rev. 1.0, 2007-01-05 SLEEP > 2.0V, VIN1 = 12V 9 10 11 mARMS 11 12 13 mARMS Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 5 % 1.6 mARMS 0.3 VRMS V Page 2 ELECTRICALS Full Bright Lamp Current (two lamps) PanelMatch™ ® TM LXMG1626-12-46 12V Dual 6W CCFL Programmable Inverter Module P RODUCTION D ATASHEET Parameter ` ` ` Units VBRT_ADJ = 0VDC VBRT_ADJ = 3VDC -13 1 µADC µADC 2.0 Test Conditions BRITE INPUT Input Current ` LXMG1626-12-46 Min Typ Max Symbol IBRT Minimum Input for Max. Lamp Current VBRT_ADJ IO(LAMP) = Maximum Lamp Current Maximum Input for Min. Lamp Current VBRT_ADJ IO(LAMP) = Minimum Lamp Current 2.05 VDC 0 VDC SLEEP INPUT RUN Mode VSLEEP 2.1 VIN1 VDC SLEEP Mode VSLEEP -0.3 0.8 VDC 0.4 V WWW . Microsemi .C OM 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. SET INPUT SET Low Threshold VL Input Current ISET VSET ≤ 0.4V -500 µA POWER CHARACTERISTICS Sleep Current IIN(MIN) Run Current IIN(RUN) η Efficiency VIN1 = 12VDC, SLEEP < 0.8V 0.0 VIN1 = 12VDC, SLEEP ≥ 2.0V, ISET = Ground VLAMP = 370VRMS VIN1 = 12VDC, SLEEP ≥ 2.0V, ISET = Ground VLAMP = 370VRMS 12 50 µADC 360 mADC 85 % FUNCTIONAL PIN DESCRIPTION CONN PIN DESCRIPTION CN1 (Molex 53261-0871) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501G input cable assembly CN1-1 CN1-2 CN1-3 CN1-4 VIN1 Main Input Power Supply (10.8V < VIN1 < 13.2V) 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 2.0VDC). 2.0VDC gives maximum lamp current. CN1-7 SET CN1-8 FAULT SET Connecting this pin to ground decreases the output current (see Table 1) High Impedance Output that indicates lamp status, high indicates fault (see figure 2 on page 5) CN2-1 CN2-2 CN2-3 CN2-4 Copyright © 2005 Rev. 1.0, 2007-01-05 VHI1 High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to ground. VHI2 High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to ground. NC VLO No Connect Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to ground Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 ELECTRICALS CN2 for LXMG1626-12-46 (JST SM03(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-07A00 ) PanelMatch™ 12V Dual 6W CCFL Programmable Inverter Module ® TM LXMG1626-12-46 P RODUCTION D ATASHEET WWW . Microsemi .C OM TABLE 1 OUTPUT CURRENT SETTINGS SET1 (Pin 7) Open* Ground Nominal Output Current 12mA 10mA * If driven by a logic signal it should be open collector or open drain only, not a voltage source. PHYSICAL DIMENSIONS LXMG1626-12-46 UNPLATED MOUNTING HOLE 3MM ± 0.1 DIA. 6MM HEAD CLEARANCE BOTH HOLES 113mm 4.45in. CN1 W 83mm ± 0.2 22mm ± 0.2 0.866in. 1.181in. W 4.0mm 0.157in. 30mm CN2 3.27in. 16mm GROUNDED MOUNTING HOLE 3MM ± 0.1 DIA. 0.630in. 1.0mm 0.0394in. 6.5mm 0.265in. Max weight: 15g Outside PCB tolerances ± 0.5mm , 4-40 recommended mounting screws SIMPLIFIED BLOCK DIAGRAM +3V Ramp - Transformer Driver VIN1 OCSENSE PACKAGE DATA Ramp Gen +5V VHI LAMP + 10K VHI LAMP Comparator VBRITE 0 - 2VDC High Voltage Transformer Controller 215K 10K SET ~+5V 3K 10K OVSENSE One of two ISENSE VLO FAULT Copyright © 2005 Rev. 1.0, 2007-01-05 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 PanelMatch™ ® TM LXMG1626-12-46 12V Dual 6W CCFL Programmable Inverter Module P RODUCTION D ATASHEET TYPICAL APPLICATION VIN1 BRITE 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 microcontroller 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 VHI1 and VHI2 to high voltage wires from the lamps. Connect VLO to the low voltage wire lamp return (wire with thinner insulation). Never connect VLO to circuit ground as this will defeat lamp current regulation. If both lamp wires have heavy high voltage insulation, connect the longest wire to VLO. This wire is typically white. 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. 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 factor of both the burst duty cycle and the peak output current, by using this technique the effective dim ratio can be increased greater than what the burst duty cycle alone could provide. Conversely, the SET input could be used to overdrive the lamp current temporarily to facilitate faster lamp warm up at initial lamp turn on. Of course, any possible degradation of lamp life from such practices is the user’s responsibility since not all lamps are designed to be under or overdriven. 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 figure 2. FAULT will toggle high if one or both lamps are open or short circuited. If only one lamp opens, or its high side shorts to ground then the other lamp should continue to operate with the FAULT signal going high. If both lamps open and/or both lamps are shorted the FAULT will toggle high if it is not already high and the inverter output will shutdown. Also if either low side connection of the lamps is shorted to ground, or the lamps are shorted high side to low side, FAULT will go high and the inverter will shutdown. In order to restart the inverter after a fault it is necessary to toggle the SLEEP input or cycle the VIN1 input supply. In fault induced shutdown mode the inverter will draw about 15mA from VIN1 supply. VHI1 VHI2 500K LXMG1626-12-46 SLEEP SET FAULT ` NC NC VLO GND Figure 1 – Brightness Control (Output current set to maximum) PWM Signal from System BRITE P.W . LXMG1626-12-46 10 µs to 200 µS 0 < P . W . < 100 % of period Figure 1A – PWM Brightness Control 12V BRITE VHI1 VIN1 VHI2 LXMG1626-12-46 SLEEP SET1 FAULT GND VLO Lamp(s) Status FAULT Inverter Operation Normal Operation Low One Lamp Open High Both Lamps Open One Lamp High Side Short to Ground Both Lamps High Side Short to Ground High Normal full lamp current Normal @ ~½ lamp current* Shutdown High Normal @ ~½ lamp current* High Shutdown 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 Rev. 1.0, 2007-01-05 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 APPLICATION WWW . Microsemi .C OM 12V DAC or Pot PanelMatch™ TM ® LXMG1626-12-46 12V Dual 6W CCFL Programmable Inverter Module P RODUCTION D ATASHEET WWW . Microsemi .C OM NOTES 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 Copyright © 2005 Rev. 1.0, 2007-01-05 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6