LXMG1813-12-6X

PanelMatch™ RangeMax™ LXMG1813-12-6x TM ® 12V 6W CCFL Programmable Inverter Module P RODUCTION D ATASHEET DESCRIPTION KEY FEATURES W WW . Microsemi . C OM The LXMG1813-12-6x is a Single Output 6W CCFL (Cold Cathode Fluorescent Lamp) Inverter Module designed for the driving LCD backlight lamps for panels in the range of 3.9” to 15”. Utilizing the full-bridge drive topology capabilities of the Microsemi’s highly integrated LX1697 CCFL backlight controller the inverter allows a wider input voltage range (9V to 16.8V) and wider lamp output voltage range 390V to 790V compared to Microsemi’s existing Direct Drive™ inverter solutions. For applications needing fully automatic brightness control an ‘S’ version (LXMG1813-12-6xS) of the inverter includes a connector to mate the inverter with an external light sensor board (the LXMG1800_LS) which can extend the life of the display and save power (particularly important for battery powered products). The maximum output current of the inverter is externally programmable over a range of 4mA to 7mA in 1mA steps to allow the inverter to properly match (PanelMatch™) to a wide array of LCD panel lamp current specifications. For lower input voltage requirements the LXMG1811-05-6x or -6xS will work from a 5V input supply. The modules include a dimming input that permits brightness control from a DC voltage source, a PWM signal or an external potentiometer. The resultant “burst drive” that energizes the lamp was designed to ensure that no premature lamp degradation occurs, while allowing significant power savings at lower dim levels. Other benefits of the inverter’s topology include stable fixed-frequency operation, secondary-side strike voltage regulation and both open/shorted lamp protection with fault timeout. PanelMatch Externally Programmable Maximum Output Current Wide Input Voltage Range Fixed Frequency Operation Output Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout RangeMAX Wide Range Dimming (50:1+) Rated From -30°C to 80°C UL60950 Pending RoHS Compliant APPLICATIONS Medical Instrument Displays Portable Instrumentation Desktop Displays Industrial Display Controls BENEFITS Smooth, Flicker Free Full-Range Brightness Control Programmable Output Current Allows Inverter to Mate with a Wide Variety of LCD Panel’s Specifications 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 DC Voltage Source Potentiometer PWM Signal 1 2 3 LXMG1813-12-6x LXMG1813-12-6x SELECTABLE MAXIMUM OUPUT CURRENT 4MARMS TO 7MARMS PACKAGE ORDER INFO PART NUMBER LXMG1813-12-61 LXMG1813-12-62 OUTPUT CONNECTOR JST SM02(8.0)B-BHS-1-TB(LF)(SN), Yeon Ho 20015WR-05A00 or equivalent JST SM02B-BHSS-1-TB(LF)(SN), Yeon Ho 35001WR-02A00 or equivalent INVERTER MATES DIRECTLY TO PANEL CONNECTORS JST BHR-03VS-1 JST BHSR-02VS-1 Copyright © 2008 Rev 1.0, 2008-11-25 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 1 PanelMatch™ RangeMax™ LXMG1813-12-6x TM ® 12V 6W CCFL Programmable Inverter Module P RODUCTION D ATASHEET ABSOLUTE MAXIMUM RATINGS Input Signal Voltage (VIN) ......................................................................................................................................-0.3V to 19V Input Power ......................................................................................................................................................................... 8W Output Voltage, no load ............................................................................................................................................ 1800VRMS Output Current ............................................................................................................................................................. 8mARMS Output Power ...................................................................................................................................................................... 6W 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 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. 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, may 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) Operating Ambient Temperature Range Symbol VIN PO VBRT_ADJ VLAMP IO(LAMP) TA Recommended Operating Conditions Min R.C. Max 9 8.4 0.85 390 4 -30 12 12 4.2 590 16.8 16.8 6.0 2.06 790 7 80 Units V W V VRMS mARMS °C ELECTRICAL CHARACTERISTICS The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where otherwise noted; BRITE > 2.05V, SLEEP > 2.0V, VIN = 12V. Parameter OUTPUT PIN CHARACTERISTICS Full Bright Lamp Current Full Bright Lamp Current Full Bright Lamp Current Full Bright Lamp Current Full Bright Lamp Current Min. Average Lamp Current Lamp Start Voltage Operating Frequency Burst Frequency IL(MAX) IL(MAX) IL(MAX) IL(MAX) IL(MAX) IL(MIN) VLS fO fBURST Output Burst Frequency SET1 = Ground, SET2 = Ground SET1 = Ground, SET2 = Open SET1 = Open, SET2 = Ground SET1 = Open, SET2 = Open VIN = 9 to 16.8V; SET1 = Open, SET2 = Ground BRITE ≤ 0.85V, SET1 = SET2 = Ground, IL(MIN) = ILMAX * Burst Duty Cycle -30°C < TA < 80°C, VIN ≥ 8.4V 1400 49.8 195 3.5 4.5 5.5 6.5 5.4 4.0 5.0 6.0 7.0 6.0 1.0 1600 53 208 56.2 220 4.5 5.5 6.5 7.5 6.6 mARMS mARMS mARMS mARMS mARMS mARMS VRMS kHz Hz Symbol Test Conditions LXMG1813-12-6x Min Typ Max Units ELECTRICALS ELECTRICALS Copyright © 2008 Rev 1.0, 2008-11-25 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 2 PanelMatch™ RangeMax™ LXMG1813-12-6x TM ® 12V 6W CCFL Programmable Inverter Module P RODUCTION D ATASHEET ELECTRICAL CHARACTERISTICS (CONTINUED) The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where otherwise noted; BRITE > 2.05V, SLEEP > 2.0V, VIN = 12V. Parameter BRITE INPUT Input Current Minimum Input for Max. Lamp Current Maximum Input for Min. Lamp Current Potentiometer used for BRITE Control Minimum PWM Input Frequency SLEEP BAR INPUT RUN Mode SLEEP Mode SET1,2 INPUT SET1,2 Low Threshold Input Current POWER CHARACTERISTICS Sleep Current Run Current Supply Current under Fault condition Strike (Open Lamp) Typical Efficiency IIN(MIN) IRUN IFAULT TS_DWELL η SET1 = Open SET2 = Ground, VLAMP = 590VRMS VL ISET SETx = 0V 0 -520 10 370 8 1.5 75 20 V µA µA mA mA 2.5 Sec % IBRT VBRT_ADJ VBRT_ADJ BRITE = 0V BRITE = 2.1V IO(LAMP) = Maximum Lamp Current IO(LAMP) = Minimum Lamp Current %BRT_PWM < 50% (Visual Artifact Avoidance) -10 -6 1.96 µA µA V V kΩ kHz V V W WW . Microsemi . C OM Symbol Test Conditions LXMG1813-12-6x Min Typ Max Units 1.85 0.85 2.06 RBRT FBRT_PWM 400 3 2.0 -0.3 500 600 100 VIN 0.8 VSLEEP VSLEEP SLEEP ≤ 0.8V SET1 = Open SET2 = Ground, VLAMP = 590VRMS Fault condition 2 80 FUNCTIONAL PIN DESCRIPTION CONN CN1-1 CN1-2 CN1-3 CN1-4 CN1-5 CN1-6 CN1-7 CN1-8 PIN DESCRIPTION CN1 (Molex 53261-0871 or equivalent) mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501G input cable assembly VIN GND Main Input Power Supply (9V ≤ VIN ≤ 16.8V) , Functional 8.4V to 16.8V Power Supply Return ON/OFF Control. (0V ≤ SLEEP ≤ 0.8V = OFF, SLEEP ≥ 2.0V = ON SLEEP BRITE SET1 SET2 Brightness Control (0.85V to 2.06V). 2.06V ensures maximum lamp current. Leaving the pin open provides maximum lamp current SET1 MSB Connecting this pin to ground decreases the output current (see Table 1) SET2 LSB Connecting this pin to ground decreases the output current (see Table 1) ELECTRICALS ELECTRICALS CN2 for LXMG1813-12-61 and -62 (JST SM02(8.0)B-BHS-1-TB(LF)(SN) ; Yeon Ho 20015WR-05A00, SM02B-BHSS-1-TB(LF)(SN) ; Yeon Ho 35001WR-02A00) or equivalent CN2-1 CN2-2 VHI VLO High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground Copyright © 2008 Rev 1.0, 2008-11-25 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 3 PanelMatch™ RangeMax™ LXMG1813-12-6x TM ® 12V 6W CCFL Programmable Inverter Module P RODUCTION D ATASHEET TABLE 1 W WW . Microsemi . C OM OUTPUT CURRENT SETTINGS SET1 (Pin 7) Open* Open* Ground Ground SET2 (Pin 8) Open* Ground Open* Ground Nominal Output Current 7.0mA 6.0mA 5.0mA 4.0mA PHYSICAL DIMENSIONS LXMG1813-12-6x 110mm 93.5mm 3.68in. 4.33in. MOUNTING HOLE 3.18MM ±.08 DIA. * If driven by a logic signal it should be open collector or open drain only, not a voltage source. CN1 16mm 0.63in. 9mm ±0.2 0.354in. 12.5mm 0.492in CN2 CN2 3.5mm 0.138in. 74mm ±0.2 19.5mm 0.768in. GROUNDED MOUNTING HOLE 3.18MM ±.08 DIA. 2.91in Warning High Voltage is present at high side of transformer, its core and the high side of the output connector, please provide at least 3 mm clearance (in all directions) on the component side of the board to any conductor when mounting 6.0mm Max 0.236in. 1.0mm ±0.1 0.0394in. R1.0 PCB tolerances ± 0.5mm , M3 recommended mounting screws Weight: (9g) typ. All dimensions are in millimeters, inches are for reference only SIMPLIFIED BLOCK DIAGRAM +5.1V VIN 511k BRITE 174k 0.1µF LAMP HI 2.2µF Control Circuitry VIN BLOCK DIAGRAM SLEEP +5.1V 10k LAMP OVSENSE SET1 +5.1V 10k SET2 ISENSE LAMP LO Copyright © 2008 Rev 1.0, 2008-11-25 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 4 PanelMatch™ RangeMax™ LXMG1813-12-6x TM ® 12V 6W CCFL Programmable Inverter Module P RODUCTION D ATASHEET TYPICAL APPLICATION W WW . Microsemi . C OM Voltage Source, DAC, or Potentiometer 0.85 to 2.06V 500k 12V VIN VHI BRITE LXMG1813-12-6x CCFL TUBE 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 511k pull-up to typically 5.1V to bias the pot. A PWM signal from a micro-controller may also be used as shown in Figure 1A. Logic levels 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 2V divided by the logic high voltage level; with 3.3V logic level this corresponds to about 60% 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 manufacture'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. 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 up to about two seconds, after which (without success) the inverter will shutdown. In this mode the inverter will draw about 8mA from VIN. In order to restart the inverter it is necessary to toggle the sleep input or cycle the VIN input supply. SLEEP SET1 NC SET2 NC GND VLO Figure 1 – Brightness Control PWM Signal from System P.W. BRITE LXMG1813-12-6x 10µs to 333µS 0 < P.W. < 100% of period Figure 1A – PWM Brightness Control 12V BRITE VIN VHI CCFL TUBE VLO LXMG1813-12-6x SLEEP SET1 SET2 GND APPLICATION APPLICATION L 4.0mARMS H 5.0mARMS L 6.0mARMS H 7.0mARMS L=GND; H=Open Figure 2 – Max Output Current (SET1 and SET2 Inputs) L L H H Copyright © 2008 Rev 1.0, 2008-11-25 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 5 PanelMatch™ RangeMax™ LXMG1813-12-6x TM ® 12V 6W 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 © 2008 Rev 1.0, 2008-11-25 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 6