PanelMatch™ RangeMAX™ LXMG1627-12-44 ® TM 12V Dual 4W CCFL Programmable Inverter Module P RODUCTION D ATASHEET DESCRIPTION KEY FEATURES Externally Programmable Maximum Output Current Easy to Use Brightness Control RangeMAX Wide Range Dimming Output Open & Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout Fixed Frequency Operation Rated From -30°C to 80°C UL60950 E175910 Pending RoHS Compliant This allows the inverter to match the panel’s lamp current specifications. The modules convert a DC voltage from the system battery or AC adapter directly to high frequency, high-voltage waves required to ignite and operate CCFL lamps. A 5V input inverter version is also available: LXMG1627-05-44. The module’s design utilizes Microsemi’s LX6512 backlight controller, which provides a number of cost and performance advantages due to the controller’s high level of integration. 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 for open lamp condition. The new LXMG1627-xx-44 modules are designed therefore as a wider temperature range near drop-inreplacement for the LXMG1623-xx-44 inverters, the major difference being the input voltage adjustment range of the BRITE (dimming) pin. APPLICATIONS WWW . Microsemi .C OM The LXMG1627-12-44 is a Dual 4W Output Direct Drive™ CCFL (Cold Cathode Fluorescent Lamp) Inverter Module specifically designed to be compatible with the Sharp LQ104S1DG51 /61 10.4”, LQ121S1DG41/61 12.1” as well as the 10.4” Toshiba Matsushita LTA104D182F/183F and the Samsung LTM121SI-T01 12.1” or similar dual lamp displays that have individual lamp output connectors on one side of the panel. LXMG1627 modules provide the designer with a vastly superior display brightness range. The RangeMAX™ Digital Dimming Technique supplies flicker-free brightness control for any wide range (typically 50:1+) dimming application. The included dimming input permits brightness control from either, a DC voltage source, a PWM signal or an external potentiometer. The maximum output current is externally programmable (through the input connector) over a range of 5mA to 6.5mA in 0.5mA steps. LCD’s Requiring Both Output Connectors on One Side of Panel Sharp LQ104S1DG51/61 and LQ121S1DG41/61 Samsung LTM121SI-T01 Toshiba Matsushita LTA104D182F/183F Desktop Displays Industrial Display Controls BENEFITS Smooth, Flicker Free 2%-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 UNIVERSAL DIMMING INPUT "PWM", VDC, OR POTENTIOMETER 500k W W PWM Signal 1 2 3 2 Potentiometer 1 DC Voltage Source 3 PACKAGE ORDER INFO PART NUMBER LXMG1627-12-44 Copyright © 2008 Rev. 1.1, 2008-12-09 OUTPUT CONNECTOR JST SM02(8.0)B-BHS-1-TB (LF)(SN) or Yeon Ho 20015WR-05A00 or equivalent INVERTER MATES DIRECTLY TO PANEL CONNECTORS JST BHR-03VS-1 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 1 LXMG1627-12-44 SELECTABLE MAXIMUM OUTPUT CURRENT 5.0MARMS TO 6.5MARMS PanelMatch™ RangeMAX™ LXMG1627-12-44 ® TM 12V Dual 4W CCFL Programmable Inverter Module P RODUCTION D ATASHEET WWW . Microsemi .C OM ABSOLUTE MAXIMUM RATINGS Input Signal Voltage (VIN) ......................................................................................................................................-0.3V to 16V Input Power ....................................................................................................................................................................... 10W Output Voltage, no load.............................................................................................................Internally Limited to 1800VRMS Output Current..............................................................................................................................................................9mARMS Output Power (each output) ............................................................................................................................................. 4.0W Input Signal Voltage ( SLEEP Input) ....................................................................................................................... -0.3V to VIN 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: 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, might not function optimally. Parameter Symbol Recommended Operating Conditions Min R.C. Max Input Supply Voltage Range (Fully Regulated 10.8 12 Lamp Current) VIN Input Supply Voltage Range (Functional) 10.2 12 3.5 Output Power (each output) PO Linear BRITE Control Input Voltage Range¹ VBRT_ADJ 0 Lamp Operating Voltage VLAMP 450 530 Lamp Current (Full Brightness) IOLAMP 5.0 Operating Ambient Temperature Range TA -30 ¹ The BRITE minimum input voltage level is 0V to 2.5V, whereas it is 0.5V to 2.0V in the LXMG1623-12-44 inverter. Units 13.2 V 14.4 4.0 2.5 610 6.5 80 W V VRMS mARMS °C ELECTRICAL CHARACTERISTICS Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C, BRITE ≥ 2.5V, SLEEP > 2.0V, VIN = 12V except where otherwise noted. LXMG1627-12-44 Parameter Symbol Test Conditions Units Min Typ Max OUTPUT PIN CHARACTERISTICS IL(MAX) SET1 = Ground, SET2 = Ground 4.5 5.0 5.5 mARMS Full Bright Lamp Current (each output) IL(MAX) SET1 = Ground, SET2 = Open 5.0 5.5 6.0 mARMS Full Bright Lamp Current (each output) IL(MAX) SET1 = Open, SET2 = Ground 5.5 6.0 6.5 mARMS Full Bright Lamp Current (each output) IL(MAX) SET1 = Open, SET2 = Open 6.0 6.5 7.0 mARMS Output Current Lamp to Lamp Deviation ILL%DEV 3 10 % Min. Average Lamp Current (each output) Lamp Start Voltage VLS Operating Frequency Burst Frequency Copyright © 2008 Rev. 1.1, 2008-12-09 IL(MIN) SET1 = Open, SET2 = Open BRITE = 0V, SET1 = SET2 = Ground, IL(MIN) = ILMAX * Burst Duty Cycle mARMS 1600 VRMS -30°C < TA < 80°C, VIN > 10.8V 1400 54 60 66 kHz Output Burst Frequency 198 233 268 Hz fO fBURST 1.2 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 2 ELECTRICALS Full Bright Lamp Current (each output) PanelMatch™ RangeMAX™ LXMG1627-12-44 12V Dual 4W CCFL Programmable Inverter Module ® TM P RODUCTION D ATASHEET Parameter Symbol Input Current IBRT Test Conditions LXMG1627-12-44 Min Typ Max Units BRITE = 0V BRITE = 2.5V -16 -5 -18 -7 -20 -9 µA µA IO(LAMP) = Maximum Lamp Current 2.1 2.3 2.5 V Minimum Input for Max. Lamp Current BRITEMIN Maximum Input for Min. Lamp Current BRITEMAX IO(LAMP) = Minimum Lamp Current 0 V Minimum PWM Input Frequency FBRT_PWM 8 kHz %BRT_PWM < 50% (Visual Artifact Avoidance) SLEEP BAR INPUT RUN Mode VSLEEP 2.0 VIN V SLEEP Mode VSLEEP -0.3 0.8 V WWW . Microsemi .C OM ELECTRICAL CHARACTERISTICS (CONTINUED) Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C, BRITE ≥ 2.5V, SLEEP > 2.0V, VIN = 12V except where otherwise noted. SET1,2 INPUT SET1,2 Low Threshold VL Input Current ISET SETx = 0V 0 V -420 µA POWER CHARACTERISTICS Sleep Current IIN(MIN) SLEEP ≤ 0.8V Run Current IIN(RUN) SET1 = Open, SET2 = Ground, VLAMP = 530VRMS Strike (Open Lamps) TS_DWELL Supply Current After Fault Timeout IFAULT η Efficiency 5 20 550 1.0 1.2 µA mA 2 Sec Fault Timeout 7 mA SET1 = Open, SET2 = Ground, VLAMP = 530VRMS 82 % FUNCTIONAL PIN DESCRIPTION CONN PIN DESCRIPTION CN1 (Molex 53261-0871 or equivalent) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501G input cable assembly CN1-1 VIN CN1-2 CN1-3 CN1-4 GND Main Input Power Supply (10.8V ≤ VIN ≤ 13.2V) Power Supply Return ON/OFF Control. (0V ≤ SLEEP ≤ 0.8 = OFF, SLEEP ≥ 2.0V = ON) 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) Brightness Control (0V to 2.5V). 2.5V insures maximum lamp current. ELECTRICALS CN2, CN3 for LXMG1627-12-44 (JST SM02(8.0)B-BHS-1-TB (LF)(SN) or Yeon Ho 20015WR-05A00 or equivalent) CN2-1 CN3-1 VHI High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. CN2-2 CN3-2 VLO Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground Copyright © 2008 Rev. 1.1, 2008-12-09 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 3 PanelMatch™ RangeMAX™ LXMG1627-12-44 12V Dual 4W CCFL Programmable Inverter Module ® TM P RODUCTION D ATASHEET TABLE 1 WWW . Microsemi .C OM OUTPUT CURRENT SETTINGS SET1 (Pin 7) Open* Open* Ground Ground SET2 (Pin 8) Open* Ground Open* Ground Nominal Output Current 6.5mA 6.0mA 5.5mA 5.0mA * If driven by a logic signal it should be open collector or open drain only, not a voltage source. PHYSICAL DIMENSIONS LXMG1627-12-44 108.7mm 4.28in. 85.75mm ±0.2mm 3.375in. 0.413in. 19.45mm CN1 W 0.765in. 1 22.35mm 0.88in. 8 3.05MM X 2 DIA. ±0.08 6MM SCREW HEAD CLEARANCE Outside dimension PCB tolerances ± 0.5mm GROUNDED MOUNTING HOLE Warning High Voltage is present CN3 CN2 at high side of 12.7mm transformer, its core and ±0.2mm the high side of the 0.500in. output connectors, 6.75mm please provide at least 2 0.266in. mm clearance (in all PLASTIC SCREW REQUIRED directions) on the component side of the board to any conductor when mounting 10.2 mm 1.0mm ±0.1 0.0394in. W 10.5mm 0.402in Max Weight: (18g) typ. Dimensions are in millimeters (inches are for reference only) SIMPLIFIED BLOCK DIAGRAM +4.2V High Voltage Transformer Controller 191k Comparator + 0 – 2.5V 43.2k Ramp - Ramp Gen VHI VIN VHI OVSENSE PACKAGE DATA +4.2V Transformer Driver VHI LAMP2 VBRITE Z SET1 +4.2V ISENSE Z LAMP1 10k VLO 10k SET2 VLO Copyright © 2008 Rev. 1.1, 2008-12-09 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 4 PanelMatch™ RangeMAX™ LXMG1627-12-44 12V Dual 4W CCFL Programmable Inverter Module ® TM P RODUCTION D ATASHEET 12V DAC or Pot 0V to 2.5V 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 191k pull-up resistor in series with 43.2k to 4.2V to bias the pot (see block diagram). A PWM Logic level signal (figure 1A) may be used up to 5V; however the inverter will reach maximum current at less than 100% duty cycle. This can be calculated as approximately 2.3V divided by the logic high voltage level; with 3.3V logic level this corresponds to about 70% duty cycle for maximum lamp current. If you need to turn the inverter ON/OFF remotely, connect to TTL logic signal to the SLEEP input. Connect VHI to high voltage wire from the lamp. Connect VLO to the low voltage wire (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 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 manufacturers. Generally the best lamp lifetime correlates with driving the CCFL at the manufacturer’s 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. 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 user’s responsibility since not all lamps are designed to be overdriven. The inverter has a built in fault timeout function. If the output is open (lamp disconnected or broken) the inverter will attempt to strike the lamp for about 1.2 seconds, without success the inverter will shutdown. In order to restart the inverter it is necessary to toggle the sleep input or cycle the VIN input supply. If either high side lamp output is directly connected to ground the inverter will immediately shutdown. VIN BRITE LAMPHI 500k CCFL TUBE LXMG1627-12-44 LAMPLO SLEEP SET1 SET2 One of Two GND NC NC Figure 1 – Brightness Control (Output current set to maximum) PWM Signal from System BRITE P.W. LXMG1627-12-44 2.5µs to 125µS 0 < P.W. < 100% of period Figure 1A – PWM Brightness Control 12V VIN BRITE VHI CCFL TUBE LXMG1627-12-44 SLEEP SET1 SET2 GND VLO ONE OF TWO L L H H L 5.0mARMS H 5.5mARMS L 6.0mARMS H 6.5mARMS L=GND; H=Open Figure 2 – Max Output Current (SET1 and SET2 Inputs) Copyright © 2008 Rev. 1.1, 2008-12-09 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 5 APPLICATION WWW . Microsemi .C OM TYPICAL APPLICATION PanelMatch™ RangeMAX™ LXMG1627-12-44 TM ® 12V Dual 4W 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 © 2008 Rev. 1.1, 2008-12-09 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 6