PanelMatch™ ® TM LXMG1617-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET KEY FEATURES DESCRIPTION The resultant “burst drive” that energizes the lamp was 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. A 5V input inverter is also available (LXMG1617-05-2x). The modules design is based on Microsemi’s new LX1689 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. Externally Programmable Maximum Output Current Easy to Use Brightness Control Output Short-Circuit Protection and Automatic Strike-Voltage RangeMAX Wide Range Dimming Regulation and Timeout Rated From -20 to 70°C UL60950 E175910 RoHS Compliant WWW . Microsemi .C OM The LXMG1617-03-2x is a Single Output 2.2W Direct Drive™ CCFL (Cold Cathode Fluorescent Lamp) Inverter Module specifically designed for driving LCD backlight lamps. It is ideal for driving typical 3.9” to 6.4” TFT panels. LXMG1617 modules provide the designer with a vastly superior display brightness range. This brightness range is achievable with virtually any LCD display. The maximum output current is externally programmable over a range of 3.5 to 5mA in 0.5mA steps to allow the inverter to properly match to a wide array of LCD panel lamp current specifications. The modules include a dimming input that permits brightness control from a dc voltage source, a PWM signal or an external potentiometer. RangeMAX Digital Dimming Technique provides flicker-free brightness control in any wide range typically (50:1+) dimming application. APPLICATIONS PDA’s Portable Instrumentation 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 Potentiometer PWM Signal 1 W SELECTABLE MAXIMUM OUPUT CURRENT 3.5MA TO 5MARMS PACKAGE ORDER INFO PART NUMBER LXMG1617-03-21 LXMG1617-03-22 Copyright © 2002 Rev. 1.1, 2006-09-19 OUTPUT CONNECTOR INVERTER MATES DIRECTLY TO PANEL CONNECTORS JST SM02(8.0)B-BHS-1-TB (LF)(SN) or Yeon Ho 20015WR-05A00 JST SM02B-BHSS-1-TB (LF)(SN) or Yeon Ho 35001WR-02A00 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 JST BHR-03VS-1 JST BHSR-02VS-1 Page 1 LXMG1617-03-2X 2 3 DC Voltage Source PanelMatch™ ® TM LXMG1617-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET Input Signal Voltage (VIN1).......................................................................................................................................-0.3V to 5V Input Power ...................................................................................................................................................................... 3.0W Output Voltage, no load ............................................................................................................ Internally Limited to 1300VRMS Output Current ...............................................................................................................................6mARMS (Internally Limited) Output Power ................................................................................................................................................................... 2.3W Input Signal Voltage ( SLEEP Input) .......................................................................................................................-0.3V to 5V Input Signal Voltage (BRITE) ..................................................................................................................................-0.3V to 5V Ambient Operating Temperature, zero airflow.....................................................................................................-20°C to 70°C 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 Recommended Operating Conditions Min R.C. Max 3 VIN1 3.3 3.6 2.9 PO VBRT_ADJ VLAMP IOLAMP TA 0.5 325 3.5 -20 Units V 4.2 2.2 2.0 435* 5† 70 380 W V VRMS mARMS °C *Total output power must not exceed 2.2W . Higher voltage lamps may require maximum output current to be set lower than 5mARMS †At input voltages below 3.6V the inverter may not be able to output the full 5mARMS in all configurations. 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 LXMG1617-03-2x Min Typ Max Units OUTPUT PIN CHARACTERISTICS IL(MAX) Full Bright Lamp Current IL(MAX) Full Bright Lamp Current IL(MAX) Full Bright Lamp Current IL(MAX) Min. Average Lamp Current Lamp Start Voltage Operating Frequency Burst Frequency Copyright © 2002 Rev. 1.1, 2006-09-19 IL(MIN) VLS fO fBURST VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 3.3VDC ISET1 = Ground, ISET2 = Ground VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 3.3VDC ISET1 = Ground, ISET2 = Open VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 3.3VDC ISET1 = Open, ISET2 = Ground VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 3.3VDC ISET1 = Open, ISET2 = Open VBRT_ADJ ≤0.5VDC, SLEEP > 2.0V, VIN1 = 3.3VDC ISET1 = ISET2 = Ground -20°C < TA < 70°C, VIN1 > 3.15VDC VBRT_ADJ = 2.5VDC, SLEEP > 2.0V, VIN1 = 3.3V Output Burst Frequency 3.0 3.5 4.0 mARMS 3.5 4.0 4.5 mARMS 4.0 4.5 5.0 mARMS 4.5 5 5.5 mARMS 0.21 mARMS 1000 1100 85 89 94 kHz 166 174 184 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 PanelMatch™ ® TM LXMG1617-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET Parameter ` Symbol ` ` LXMG1617-03-2x Min Typ Max Units -300 50 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 0.4 2.05 0.5 VDC VDC SLEEP INPUT RUN Mode VSLEEP 2.0 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 IRUN η Efficiency VIN1 = 3.3VDC, SLEEP < 0.8V 0.0 VIN1 = 3.3VDC, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 380VRMS VIN1 = 3.3VDC, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 380VRMS 3 10 µADC 690 mADC 75 % 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 (3V < VIN1 < 3.6V) 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 ≥ 2.0V = ON Brightness Control (0.5V to 2.0VDC). 2.0VDC gives maximum lamp current. CN2-1 Copyright © 2002 Rev. 1.1, 2006-09-19 VHI ELECTRICALS CN2 for LXMG1617-03-21 and -22 (JST SM02(8.0)B-BHS-1-TB(LF)(SN) | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB (LF)(SN) | Yeon Ho 35001WR-02A00) High voltage connection to high side of lamp. Connect to lamp terminal with shortest 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 PanelMatch™ ® TM LXMG1617-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET 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 5.0mA 4.5mA 4.0mA 3.5mA * If driven by a logic signal it should be open collector or open drain only, not a voltage source. PHYSICAL DIMENSIONS LXMG1617-03-2X 86mm 71mm 3.39in MOUNTING HOLE 2.44MM ±0.08 DIA. 2.80in X CN1 16mm 3.5mm 0.63in. 0.138in. 9mm ±2mm 0.354 in. CN2 12.5mm 0.492in W 11mm GROUNDED MOUNTING HOLE 2.44MM ±0.08 DIA. 0.433in. 60mm ±0.2mm 2.36in. 0.8mm 4.6mm Max 0.0315in. 0.181in. PCB tolerances ± 0.5mm, M2 or 2-56 recommended mounting screws R1.0 Warning High Voltage Present at high side of transformer Weight: (5.7g) typ. and Output Connector All dimensions are in millimeters, inches are for reference only. SIMPLIFIED BLOCK DIAGRAM High Voltage Transformer Controller 10K V BRITE Comparator + 0.5 2V DC Ramp +3V Ramp Gen V IN1 OC SENSE PACKAGE DATA - Transformer Driver V HI LAMP +3V 10K SET 1 SET 2 Copyright © 2002 Rev. 1.1, 2006-09-19 +3V OV SENSE 10K ISENSE Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 V LO Page 4 PanelMatch™ ® TM LXMG1617-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET 3.3V DAC or Pot 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 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 a 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 as 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) or shorted the inverter will attempt to strike the lamp for several seconds. After about 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 VIN1 input supply. VHI LXMG1617-03-2x 1.8K SLEEP SET1 SET2 GND CCFL TUBE VLO NC NC Figure 1 – Brightness Control (Output current set to maximum) PWM Signal from System BRITE P.W. LXMG1617-03-2x 10µs to 125µS 0 < P.W. < 100% of period Figure 1A – PWM Brightness Control 3.3V BRITE VIN1 VHI CCFL TUBE LXMG1617-03-2x SLEEP SET1 L L H H SET2 GND VLO L 3.5mARMS H 4.0mARMS L 4.5mARMS H 5.0mARMS L=GND; H= Open Figure 2 – Max Output Current (SET1 and SET2 Inputs) Copyright © 2002 Rev. 1.1, 2006-09-19 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 20K manual pot. The inverter contains an internal 10K pull-up to 3V to bias the pot add a 1.8K resistor to set the lower threshold voltage. A 3.3V Logic Level PWM signal from a micro-controller may also be used as shown in Figure 1A. VIN1 BRITE 0.45V 20K to 2.0V WWW . Microsemi .C OM TYPICAL APPLICATION PanelMatch™ TM ® LXMG1617-03-2x 3.3V 2.2W 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 © 2002 Rev. 1.1, 2006-09-19 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6