PanelMatch™ 12V 10W Dual CCFL Programmable Inverter Module ® TM LXMG1626-12-65 P RODUCTION D ATA S HEET KEY FEATURES DESCRIPTION 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 modules convert DC voltage from the system battery or AC adapter directly to high frequency, high-voltage waves required to ignite and operate CCFL lamps. The modules design utilizes Microsemi’s LX1691B backlight controller, which provides a number of cost and performance advantages due to the controller’s high level of integration. A 5V input supply version (LXMG1626-05-65) is also available. 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 Fixed Frequency Operation Rated From -20 to 70°C UL60950 E175910 RoHS Compliant WWW . Microsemi .C OM The LXMG1626-12-65¹ is a 10W dual Output Direct Drive™ CCFL (Cold Cathode Fluorescent Lamp) Inverter Module specifically designed to be compatible with a variety of LCD panels the 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) over a range of 10 to 13mA in 1mA steps. 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. RangeMAX™ Digital Dimming Technique provides flicker-free brightness control in any APPLICATIONS Dual Lamp LCD’s Requiring a Shared Common Lamp Return Mates to a Single JST BHR-04-VS1 Lamp Connector Desktop Displays 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 ¹Protected By U.S. Patents: 5,923,129; 5,930,121; 6,198,234; Patents Pending DC Voltage Source Potentiometer PWM Signal INPUT PRODUCT HIGHLIGHT LXMG1626-12-65 1 2 3 4 Microsemi W HI HI UNIVERSAL DIMMING INPUT "PWM", VDC, OR POTENTIOMETER Lamp Current 10 to 13mA in 1mA Steps PACKAGE ORDER INFO PART NUMBER LXMG1626-12-65 Copyright © 2005 Rev. 1.0a, 2006-11-16 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 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 PanelMatch™ 12V 10W Dual CCFL Programmable Inverter Module ® TM LXMG1626-12-65 P RODUCTION D ATA S HEET Input Signal Voltage (VIN1).....................................................................................................................................-0.3V to 16V Input Power ....................................................................................................................................................................... 14W Output Voltage, no load ............................................................................................................ Internally Limited to 1800VRMS Output Current ............................................................................................................................7.5mARMS (Internally Limited) Output Power .................................................................................................................................................................... 10W Input Signal Voltage ( SLEEP Input) ..................................................................................................................... -0.3V to VIN1 Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V Ambient Operating Temperature, zero airflow.....................................................................................................-20°C to 70°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 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) Operating Ambient Temperature Range VIN1 PO VBRT_ADJ VLAMP IOLAMP TA Recommended Operating Conditions Min R.C. Max 10.8 12 13.2 10.2 12 8 14.4 9 2.0 690 13 70 0.1 510 10 -20 600 Units V W V VRMS mARMS °C ELECTRICAL CHARACTERISTICS Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of 25°C except where otherwise noted. Parameter ` Symbol Test Conditions LXMG1626-12-65 Min Typ Max Units OUTPUT PIN CHARACTERISTICS IL(MAX) Full Bright Lamp Current (two lamps) IL(MAX) Full Bright Lamp Current (two lamps) 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 Operating Frequency Burst Frequency Copyright © 2005 Rev. 1.0a, 2006-11-16 IL(MIN) VLS fO fBURST VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = Ground, ISET2 = Ground VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = Ground, ISET2 = Open VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = Open, ISET2 = Ground VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = Open, ISET2 = Open VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = Open, ISET2 = Open VBRT_ADJ = 0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = ISET2 = Ground; IMIN = IMAX * √ of % duty cycle -20°C < TA < 70°C, VIN1 > 10.8VDC VBRT_ADJ = 2.0VDC, SLEEP > 2.0V, VIN1 = 12V Output Burst Frequency 9 10 11 mARMS 10 11 12 mARMS 10.8 12 13.2 mARMS 11.6 13 14.4 mARMS 5 % 1.4 mARMS 1450 1600 57.5 60.5 63.5 kHz 224 236 248 Hz Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 VRMS Page 2 ELECTRICALS Full Bright Lamp Current (two lamps) PanelMatch™ ® TM LXMG1626-12-65 12V 10W Dual CCFL Programmable Inverter Module P RODUCTION D ATA S HEET Parameter ` Symbol ` ` LXMG1626-12-65 Min Typ Max Units -13 1 µADC µADC BRITE INPUT Input Current ` Test Conditions IBRT VBRT_ADJ = 0VDC VBRT_ADJ = 3VDC 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 2.0 2.05 0 VDC 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. SET1,2 INPUT SET1,2 Low Threshold VL Input Current ISET VSET ≤ 0.4V -300 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, ISET1 = Ground ISET2 = Open, VLAMP = 600VRMS VIN1 = 12VDC, SLEEP ≥ 2.0V, ISET1 = Ground ISET2 = Open, VLAMP = 600VRMS 10 50 µADC 720 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 CN1-6 BRITE CN1-7 SET1 SET1 MSB Connecting this pin to ground decreases the output current (see Table 1) CN1-8 SET2 SET2 LSB Connecting this pin to ground decreases the output current (see Table 1) ON/OFF Control. (0V < SLEEP < 0.8 = OFF, SLEEP >= 2.1V = ON Brightness Control (0V to 2.0VDC). 2.0VDC gives maximum lamp current. CN2-1 CN2-2 CN2-3 CN2-4 Copyright © 2005 Rev. 1.0a, 2006-11-16 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 No Connect VLO 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 LXMG1626-12-65 (JST SM04(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-07A00 ) PanelMatch™ 12V 10W Dual CCFL Programmable Inverter Module ® TM LXMG1626-12-65 P RODUCTION D ATA S HEET WWW . Microsemi .C OM TABLE 1 OUTPUT CURRENT SETTINGS SET1 (Pin 7) Open* Open* Ground Ground SET2 (Pin 8) Open* Ground Open* Ground Nominal Output Current 13mA 12mA 11mA 10mA * If driven by a logic signal it should be open collector or open drain only, not a voltage source. PHYSICAL DIMENSIONS LXMG1626-12-65 UNPLATED MOUNTING HOLE 133mm 3MM ±.08 DIA. 6MM HEAD CLEARANCE BOTH HOLES 5.24in. 119mm 4.69in. W CN1 CN2 21mm 0.827in. 4.0mm 0.157in. 16mm 25mm W 0.984in. GROUNDED MOUNTING HOLE 3MM ±.08 DIA. 0.630in. 1.0mm 0.0394in. 7.5mm 0.295in. Max weight: 18g PCB tolerances ± 0.5mm , 4-40 recommended mounting screws All dimensions are in millimeters. Inches are for reference only. Comparator VBRITE + 0 - 2VDC 10. 0K Ramp - Transformer Driver Ramp Gen VHI 1 V HI2 VIN1 OCSENSE PACKAGE DATA +3V High Voltage Transformer Controller 215K LAMP +3V LAMP SIMPLIFIED BLOCK DIAGRAM 10K SET1 SET2 Copyright © 2005 Rev. 1.0a, 2006-11-16 OVSENSE +3V 10K One of two ISENSE VLO Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 PanelMatch™ ® TM LXMG1626-12-65 12V 10W Dual CCFL Programmable Inverter Module P RODUCTION D ATA S HEET TYPICAL APPLICATION VIN1 BRITE VHI2 LXMG1626-12-65 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. GND Use the SET1 and SET2 (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 manufactures. Generally the best lamp lifetime correlates with driving the CCFL at the manufactures nominal current setting. However the SET1 and SET2 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 cycle and the peak output current, using this technique the effective dim ratio can be increased greater than the burst duty cycle 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 users responsibility since not all lamps are designed to be overdriven. The inverter has a built in fault timeout function. If both outputs are open (lamps disconnected or broken) or shorted to ground the inverter will attempt to strike the lamp for number of cycles. After about one to two seconds without success the inverter will shutdown. In order to restart the inverter it is necessary to toggle the SLEEP input or cycle the VIN1 input supply VLO NC NC Figure 1 – Brightness Control (Output current set to maximum) PWM Signal from System BRITE P.W. LXMG1626-12-65 5µs to 200µS 0 < P.W. < 100% of period Figure 1A – PWM Brightness Control 12V BRITE VHI1 VIN1 VHI2 LXMG1626-12-65 SLEEP SET1 SET2 GND VLO L L H H L 10mARMS H 11mARMS L 12mARMS H 13mARMS L=GND; H=Open Figure 2 – Max Output Current (SET1 and SET2 Inputs) Copyright © 2005 Rev. 1.0a, 2006-11-16 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 APPLICATION 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. VHI1 500K SLEEP SET1 SET2 WWW . Microsemi .C OM 12V DAC or Pot PanelMatch™ TM ® LXMG1626-12-65 12V 10W Dual CCFL Programmable Inverter Module P RODUCTION D ATA S HEET 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. 1.0a, 2006-11-16 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6