LXMG1626-05-46

PanelMatch™ StayLit™ TM ® LXMG1626-05-46 5V 6W Dual CCFL Programmable Inverter Module P RODUCTION D ATASHEET DESCRIPTION KEY FEATURES W WW . Microsemi . C OM The LXMG1626-05-46 is a 6W Dual 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. 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. 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 to 80°C RoHS Compliant UL60950 E175910 APPLICATIONS Dual Lamp LCD’s Requiring a Shared Common Lamp Return Mates to a Single JST BHR04VS-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 PRODUCT HIGHLIGHT INPUT DC Voltage Source Potentiometer PWM Signal LXMG1626-05-46 LXMG1626-05-46 Microsemi HI Lamp Fault Signal OUTPUT "PWM", Lamp current 5 or 6mA per Lamp VDC, OR POTENTIOMETER PACKAGE ORDER INFO HI UNIVERSAL DIMMING INPUT 1 2 3 4 PART NUMBER LXMG1626-05-46 Copyright © 2007 Rev. 1.0, 2007-03-30 OUTPUT CONNECTOR JST SM04(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-07A00 INVERTER MATES DIRECTLY TO PANEL CONNECTORS JST BHR-04VS-1 Page 1 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 PanelMatch™ StayLit™ TM ® LXMG1626-05-46 5V 6W Dual CCFL Programmable Inverter Module P RODUCTION D ATASHEET ABSOLUTE MAXIMUM RATINGS (NOTE 1) Input Signal Voltage (VIN )......................................................................................................................................-0.3V to 6V 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 5.5V 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. W WW . Microsemi . C OM 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 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 Symbol VIN PO VBRT_ADJ VLAMP IOLAMP TA Recommended Operating Conditions Min R.C. Max 4.75 4.5 0 320 5.0 -30 5 5 4.5 370 5.25 5.5 5.5 2.0 420 6.0 80 Units V W V VRMS¹ mARMS² °C ¹ Based on single lamp voltage measurement. ²At input voltages below 5V 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 OUTPUT PIN CHARACTERISTICS Full Bright Lamp Current (two lamps) Full Bright Lamp Current (two lamps) Output Current Lamp to Lamp Deviation Min. Average Lamp Current Lamp Start Voltage Operating Frequency Burst Frequency FAULT Output Voltage High FAULT Output Voltage Low IL(MAX) IL(MAX) ILL%DEV IL(MIN) VLS fO fBURST FAULTVH FAULTVL VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC ISET = Ground VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC ISET = Open VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC ISET = Open VBRT_ADJ = 0VDC, SLEEP > 2.0V, VIN = 5VDC ISET = Ground; IOUT = IMAX * SQRT of % duty cycle VIN > 4.5VDC VBRT_ADJ = 2.0VDC, FAULT = -10uA FAULT = 10uA SLEEP Symbol Test Conditions LXMG1626-05-46 Min Typ Max 9 11 10 12 5 1.6 1250 55.2 215 2.9 1400 57.6 225 3.1 0.3 0.8 60 235 11 13 Units mARMS mARMS ELECTRICALS ELECTRICALS % mARMS VRMS kHz Hz V V > 2.0V, VIN = 5V Output Burst Frequency Copyright © 2007 Rev. 1.0, 2007-03-30 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 PanelMatch™ StayLit™ TM ® LXMG1626-05-46 5V 6W Dual CCFL Programmable Inverter Module P RODUCTION D ATASHEET 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. Parameter BRITE INPUT Input Current Minimum Input for Max. Lamp Current Maximum Input for Min. Lamp Current SLEEP INPUT RUN Mode IBRT VBRT_ADJ VBRT_ADJ VBRT_ADJ = 0VDC VBRT_ADJ = 3VDC IO(LAMP) = Maximum Lamp Current IO(LAMP) = Minimum Lamp Current 0 -13 1 2.0 2.05 µADC µADC VDC VDC W WW . Microsemi . C OM Symbol Test Conditions LXMG1626-05-46 Min Typ Max Units VSLEEP VSLEEP VL ISET VSET ≤ 0.4V 2.1 -0.3 VIN 0.8 VDC VDC SLEEP Mode SET INPUT SET Low Threshold Input Current POWER CHARACTERISTICS Sleep Current Run Current Efficiency 0.4 -420 V µA IIN(MIN) IIN(RUN) η VIN = 5VDC, SLEEP < 0.8V 0.0 12 870 85 50 µADC mADC % VIN = 5VDC, SLEEP ≥ 2.0V, ISET = Ground VLAMP = 370VRMS VIN = 5VDC, SLEEP ≥ 2.0V, ISET = Ground VLAMP = 370VRMS FUNCTIONAL PIN DESCRIPTION CONN CN1-1 CN1-2 CN1-3 CN1-4 CN1-5 CN1-6 CN1-7 CN1-8 CN2-1 CN2-2 CN2-3 CN2-4 PIN DESCRIPTION CN1 (Molex 53261-0871) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501G input cable assembly VIN GND Main Input Power Supply (4.75V < VIN < 5.25V) Power Supply Return ON/OFF Control. (0V < SLEEP < 0.8 = OFF, SLEEP >= 2.1V = ON Brightness Control (0V to 2.0VDC). 2.0VDC gives maximum lamp current. 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) SLEEP BRITE SET FAULT ELECTRICALS ELECTRICALS CN2 for LXMG1626-05-46 (JST SM03(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-07A00 ) VHI1 VHI2 NC VLO High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to ground. High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to ground. No Connect Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to ground Copyright © 2007 Rev. 1.0, 2007-03-30 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 PanelMatch™ StayLit™ TM ® LXMG1626-05-46 5V 6W Dual CCFL Programmable Inverter Module P RODUCTION D ATASHEET TABLE 1 OUTPUT CURRENT SETTINGS SET1 (Pin 7) Open* Ground Nominal Output Current 12mA 10mA PHYSICAL DIMENSIONS LXMG1626-05-46 UNPLATED MOUNTING HOLE 3MM ± 0.1 DIA. 6MM HEAD CLEARANCE BOTH HOLES 113mm 4.45in. W WW . Microsemi . C OM * If driven by a logic signal it should be open collector or open drain only, not a voltage source. CN1 22mm ± 0.2 0.866in. 83mm ± 0.2 3.27in. CN2 30mm 1.181in. 4.0mm 0.157in. 16mm 0.630in. GROUNDED MOUNTING HOLE 3MM ± 0.1 DIA. 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 215K VBRITE 0 - 2VDC 9.09K Ramp +3V 10K SET ~+5V 10K 10K FAULT One of two Controller Comparator + High Voltage Transformer VIN VHI VHI Transformer Driver Ramp Gen LAMP LAMP PACKAGE DATA PACKAGE DATA OCSENSE OVSENSE ISENSE VLO Copyright © 2007 Rev. 1.0, 2007-03-30 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 PanelMatch™ StayLit™ TM ® LXMG1626-05-46 5V 6W Dual CCFL Programmable Inverter Module P RODUCTION D ATASHEET TYPICAL APPLICATION W WW . Microsemi . C OM 5V DAC or Pot BRITE VIN VHI1 VHI2 LXMG1626-05-46 500K 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 VIN input supply. In fault induced shutdown mode the inverter will draw about 15mA from VIN supply. SLEEP SET FAULT ` NC NC GND VLO Figure 1 – Brightness Control (Output current set to maximum) PWM Signal from System BRITE P.W . LXMG 1626 -05-46 10 µs to 200 µS 0 < P . W . < 100 % of period Figure 1A – PWM Brightness Control 5V BRITE VIN VHI1 VHI2 LXMG1626-05-46 SLEEP SET1 FAULT GND VLO Lamp(s) Status Normal Operation One Lamp Open Both Lamps Open One Lamp High Side Short to Ground Both Lamps High Side Short to Ground FAULT Low High High High High Inverter Operation Normal full lamp current Normal @ ~½ lamp current* Shutdown Normal @ ~½ lamp current* Shutdown A APPLICATION 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 © 2007 Rev. 1.0, 2007-03-30 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 PanelMatch™ StayLit™ TM ® LXMG1626-05-46 5V 6W Dual CCFL Programmable Inverter Module P RODUCTION D ATASHEET NOTES W WW . 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 © 2007 Rev. 1.0, 2007-03-30 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6