PanelMatch™ RangeMax™ LXMG1811-05-6x ® TM 5V 6W CCFL Programmable Inverter Module P RODUCTION D ATASHEET KEY FEATURES DESCRIPTION The LXMG1811-05-6x 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 LX6512 CCFL backlight controller the inverter allows a wider lamp output voltage range 280V to 730V compared to Microsemi’s existing Direct Drive™ inverter solutions. For applications needing fully automatic brightness control an ‘S’ version (LXMG1811-05-6xS) 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). IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PanelMatch Externally Programmable Maximum Output Current Wide Lamp 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 WWW . Microsemi .C OM 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 higher input voltage requirements the LXMG1813-12-6x or -6xS will work from a 9V to 16V 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. 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 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 1 2 3 Potentiometer PWM Signal W LXMG1811-05-6X SELECTABLE MAXIMUM OUPUT CURRENT 4MARMS TO 7MARMS PACKAGE ORDER INFO PART NUMBER OUTPUT CONNECTOR INVERTER MATES DIRECTLY TO PANEL CONNECTORS LXMG1811-05-61 LXMG1811-05-62 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 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™ LXMG1811-05-6x 5V 6W CCFL Programmable Inverter Module ® TM P RODUCTION D ATASHEET Input Signal Voltage (VIN) ........................................................................................................................................-0.3V to 6V 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. WWW . Microsemi .C OM ABSOLUTE MAXIMUM RATINGS 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 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 Recommended Operating Conditions Min R.C. Max VIN PO VBRT_ADJ VLAMP IO(LAMP) TA 4.75 4.5 0 280 4.0 -30 Units 5.0 5.0 5.25 5.5 V 4.2 6.0 2.5 730 7.0 80 W V VRMS mARMS °C 500 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 ≥ 2.5V, SLEEP ≥ 2.1V, VIN = 5V. LXMG1811-05-6x Parameter Symbol Test Conditions Units Min Typ Max ` OUTPUT PIN CHARACTERISTICS IL(MAX) SET1 = Ground, SET2 = Ground 3.5 4.0 4.5 mARMS Full Bright Lamp Current IL(MAX) SET1 = Ground, SET2 = Open 4.5 5.0 5.5 mARMS Full Bright Lamp Current IL(MAX) SET1 = Open, SET2 = Ground 5.4 6.0 6.6 mARMS Full Bright Lamp Current IL(MAX) SET1 = Open, SET2 = Open 6.3 7.0 7.7 mARMS Full Bright Lamp Current IL(MAX) VIN = 4.5 to 5.5V; SET1 = Open, SET2 = Ground 5.3 6.0 6.7 mARMS IL(MIN) BRITE = 0V, SET1 = SET2 = Ground, IL(MIN) = ILMAX * Burst Duty Cycle Min. Average Lamp Current Lamp Start Voltage Operating Frequency Burst Frequency Copyright © 2008 Rev 1.0, 2008-11-25 VLS -30°C < TA < 80°C, VIN ≥ 4.5V fO fBURST Output Burst Frequency 1.0 mARMS 1400 1650 47.7 53 58.3 kHz 173 206 239 Hz Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 VRMS Page 2 ELECTRICALS Full Bright Lamp Current PanelMatch™ RangeMax™ LXMG1811-05-6x 5V 6W CCFL Programmable Inverter Module ® TM P RODUCTION D ATASHEET otherwise noted; BRITE ≥ 2.5V, SLEEP ≥ 2.1V, VIN = 5V. Parameter ` IBRT ` BRITE = 0V -17 µA BRITE = 3V -5 µA 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 Potentiometer used for BRITE Control RBRT Minimum PWM Input Frequency ` Units Test Conditions BRITE INPUT Input Current ` LXMG1811-05-6x Min Typ Max Symbol FBRT_PWM 2.1 400 %BRT_PWM < 50% (Visual Artifact Avoidance) 2.3 2.5 0 0.1 V 500 600 kΩ 100 kHz 3 V WWW . Microsemi .C OM ELECTRICAL CHARACTERISTICS (CONTINUED) The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where SLEEP BAR INPUT RUN Mode VSLEEP 2.1 VIN V SLEEP Mode VSLEEP 0 0.8 V SET1,2 INPUT SET1,2 Low Threshold VL Input Current ISET SETx = 0V 0 V -400 µA POWER CHARACTERISTICS Sleep Current IIN(MIN) Run Current IRUN Strike (Open Lamp) SET1 = Open SET2 = Ground, VLAMP = 500VRMS TS_DWELL Supply Current under Fault condition Typical Efficiency 5 SLEEP ≤ 0.8V IFAULT η µA 2.0 Sec 750 1.0 1.4 Fault condition SET1 = Open SET2 = Ground, VLAMP = 500VRMS 20 75 mA 5 mA 80 % 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 CN1-2 CN1-3 CN1-4 VIN GND Main Input Power Supply 4.75V < VIN < 5.25V (Functional 4.5V to 5.5V) Power Supply Return SLEEP ON/OFF Control. (0V ≤ SLEEP ≤ 0.8V = OFF, SLEEP ≥ 2.1V = ON CN1-6 BRITE Brightness Control (0V to 2.5V). 2.5V gives maximum lamp current. 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) CN2 for LXMG1811-05-61 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 VHI High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. CN2-2 VLO Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground Copyright © 2008 Rev 1.0, 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 ELECTRICALS CN1-5 PanelMatch™ RangeMax™ LXMG1811-05-6x 5V 6W 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 7.0mA 6.0mA 5.0mA 4.0mA * If driven by a logic signal it should be open collector or open drain only, not a voltage source. PHYSICAL DIMENSIONS LXMG1811-05-6x 110mm 93.5mm 4.33in. MOUNTING HOLE 3.18MM ±.08 DIA. 3.68in. X CN1 16mm 0.63in. 3.5mm 12.5mm 9mm ±0.2 0.492in CN2 CN2 0.354in. X 0.138in. 74mm ±0.2 19.5mm 2.91in GROUNDED MOUNTING HOLE 3.18MM ±.08 DIA. 0.768in. 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 1.0mm ±0.1 0.0394in. 6.0mm Max 0.236in. PCB tolerances ± 0.5mm , M3 recommended mounting screws R1.0 Weight: (9g) typ. All dimensions are in millimeters, inches are for reference only SIMPLIFIED BLOCK DIAGRAM VIN +4.2V 191k 0.1µF 43.2k LAMP HI BRITE Control Circuitry 1.0µF VIN BLOCK DIAGRAM SLEEP LAMP +4.2V 10k OVSENSE SET1 +4.2V 10k ISENSE SET2 Copyright © 2008 Rev 1.0, 2008-11-25 LAMP LO 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™ LXMG1811-05-6x 5V 6W CCFL Programmable Inverter Module ® TM P RODUCTION D ATASHEET 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 1.4 seconds, after which (without success) the inverter will shutdown. In this mode the inverter will draw about 5mA from VIN. In order to restart the inverter it is necessary to toggle the sleep input or cycle the VIN input supply. VHI VIN BRITE 500k CCFL TUBE LXMG1811-05-6x SLEEP SET1 SET2 NC NC GND VLO Figure 1 – Brightness Control PWM Signal from System BRITE P.W. LXMG1811-05-6x 10µs to 333µS 0 < P.W. < 100% of period Figure 1A – PWM Brightness Control 5V VIN BRITE VHI CCFL TUBE LXMG1811-05-6x SLEEP SET1 L L H H SET2 GND VLO 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) 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 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 234.2k pull-up to typically 4.2V to bias the pot. 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 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. 5V Voltage Source, DAC, or Potentiometer 0 to 2.5V WWW . Microsemi .C OM TYPICAL APPLICATION PanelMatch™ RangeMax™ LXMG1811-05-6x TM 5V 6W CCFL Programmable Inverter Module ® P RODUCTION D ATASHEET NOTES WWW . Microsemi .C OM 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