PanelMatch™ "A Series" ® TM LXMG1617A-12-4x 12V 4W CCFL Programmable Inverter Module P RODUCTION D ATASHEET KEY FEATURES DESCRIPTION The module converts 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 is also available (LXMG1617A-05-4x). The LXMG1617A modules contain the newer highly integrated LX1691B CCFL backlight controller to provide wider dimming range (typically 100:1+) and wider temperature range (-30°C to 80°C) compared to the existing solutions offered by Microsemi. 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. The new LXMG1617A (“A Series”) modules are designed therefore as a higher performance near drop-in replacement (see BRITE minimum input voltage level and Burst Frequency) for those customers and applications currently using the LXMG1617 inverters. 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 Externally Programmable Maximum Output Current Easy to Use Brightness Control Output Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout RangeMAX Wide Range Dimming (typ. 100:1+) Fixed Frequency Operation Rated From -30°C to 80°C UL60950 E175910 RoHS Compliant WWW . Microsemi .C OM The LXMG1617A-12-4x™ is a Single Output 4W Direct Drive™ CCFL (Cold Cathode Fluorescent Lamp) Inverter Module designed for driving LCD backlight lamps. It is ideal for driving typically 8.4” to 12.1” TFT panels. LXMG1617A modules provide the designer with a 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 5mA to 6.5mA in 0.5mA steps (PanelMatch) 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. 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. APPLICATIONS Medical Instrument Displays Portable Instrumentation Industrial Display Controls BENEFITS Smooth, Flicker Free FullRange 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 PRODUCT HIGHLIGHT UNIVERSAL DIMMING INPUT "PWM", VDC, OR POTENTIOMETER Potentiometer PWM Signal 2 1 W SELECTABLE MAXIMUM OUPUT CURRENT 5MARMS TO 6.5MARMS PACKAGE ORDER INFO PART NUMBER OUTPUT CONNECTOR INVERTER MATES DIRECTLY TO PANEL CONNECTORS LXMG1617A-12-41 LXMG1617A-12-42 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 © 2007 Rev. 1.1, 2010-02-26 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 1 LXMG1617A-12-4X 3 DC Voltage Source PanelMatch™ "A Series" ® TM LXMG1617A-12-4x 12V 4W CCFL Programmable Inverter Module P RODUCTION D ATASHEET Input Signal Voltage (VIN) ......................................................................................................................................-0.3V to 15V Input Power ...................................................................................................................................................................... 5.5W Output Voltage, no load ............................................................................................................ Internally Limited to 1600VRMS Output Current ............................................................................................................................7.5mARMS (Internally Limited) Output Power ................................................................................................................................................................... 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 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, 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 Range¹ Lamp Operating Voltage Lamp Current (Full Brightness) Operating Ambient Temperature Range VIN PO VBRT_ADJ VLAMP IOLAMP TA Recommended Operating Conditions Min R.C. Max 10.8 12 13.2 10.2 12 3.5 13.8 4.0 2.0 635* 6.5 80 0 465 5 -30 550 Units V W V VRMS mARMS °C ¹ The BRITE minimum input voltage level is 0V, whereas it is 0.5V in the original LXMG1617-12-4x inverter, see application info on page 5. * Total output power must not exceed 4W. Higher voltage lamps may require maximum output current to be set lower than 6.5mARMS ELECTRICAL CHARACTERISTICS The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where otherwise noted. Parameter ` Symbol Test Conditions LXMG1617A-12-4x 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 Frequency² IL(MIN) VLS fO fBURST VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 12V ISET1 = Ground, ISET2 = Ground VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 12V ISET1 = Ground, ISET2 = Open VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 12V ISET1 = Open, ISET2 = Ground VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 12V ISET1 = Open, ISET2 = Open VBRT_ADJ = 0V, SLEEP ≥ 2.0V, VIN = 12V ISET1 = ISET2 = Gnd IL(MIN) = IL(MAX) * √(Min Duty Ratio) -30°C < TA < 80°C, VIN > 10.8V VBRT_ADJ = 2.0V, SLEEP ≥ 2.0V, VIN = 12V Output Burst Frequency 4.5 5 5.5 mARMS 5.0 5.5 6.0 mARMS 5.5 6 6.5 mARMS 6.0 6.5 7.0 mARMS 0.56 mARMS 1300 1450 76 80 83 VRMS kHz 297 313 328 Hz ² The Burst Frequency of the LXMG1617A-12-4x is twice that of the original LXMG1617-12-4x inverter. Copyright © 2007 Rev. 1.1, 2010-02-26 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 PanelMatch™ "A Series" ® TM LXMG1617A-12-4x 12V 4W CCFL Programmable Inverter Module P RODUCTION D ATASHEET The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where otherwise noted. Parameter ` Symbol ` ` LXMG1617A-12-4x Min Typ Max Units -13 0 µA µA BRITE INPUT Input Current ` Test Conditions IBRT VBRT_ADJ = 0V VBRT_ADJ = 3V Minimum Input for Max. Lamp Current VBRT_ADJ IO(LAMP) = Maximum Lamp Current Maximum Input for Min. Lamp Current³ VBRT_ADJ IO(LAMP) = Minimum Lamp Current Minimum PWM Input Frequency 1.9 2.0 V 0 V FBRT_PWM 2 kHz RUN Mode VSLEEP 2.0 V SLEEP Mode VSLEEP -0.3 WWW . Microsemi .C OM ELECTRICAL CHARACTERISTICS (CONTINUED) SLEEP BAR INPUT 0.8 V SET1,2 INPUT SET1,2 Low Threshold VL Input Current ISET VSET = 0V 0 V -540 µA POWER CHARACTERISTICS Sleep Current IIN(MIN) Run Current IRUN Run Current Ripple Voltage IRIPPLE η Efficiency 8 VIN = 12V, SLEEP ≤ 0.8V VIN = 12V, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 550VRMS VIN = 12V, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 550VRMS VIN = 12V, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 550VRMS 20 µA 330 mA 375 mVpp 85 % ³ The BRITE minimum input voltage level is 0V, whereas it is 0.5V in the original LXMG1617-12-4x inverter, see application info on page 5. 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 (10.8V ≤ VIN ≤ 13.2V) Power Supply Return 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 (0V to 2.0V). 2.0V gives maximum lamp current. CN2 for LXMG1617A-12-41 and -42 (JST SM02(8.0)B-BHS-1-TB (LF)(SN) | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1TB (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 © 2007 Rev. 1.1, 2010-02-26 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 3 ELECTRICALS CN1-5 PanelMatch™ "A Series" ® TM LXMG1617A-12-4x 12V 4W 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 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 LXMG1617A-12-4X 86mm 71mm 3.39in. MOUNTING HOLE 2.44MM ±0.08 DIA. 2.80in. CN1 X 16mm 3.5mm 0.63in. 0.138in. 9mm ±0.2mm 12.5mm 0.354in. 0.492in. Warning High Voltage is present at high side of transformer, its core and the high side of the output connector, please provide at least 2 mm clearance (in all directions) on the component side of the board to any conductor when mounting CN2 W 60mm ± 0.2mm GROUNDED MOUNTING HOLE 2.44MM ±0.08 11mm DIA. 2.36in. 0.433in. 0.8mm ±0.1mm 0.0315in. 6.2mm Max 0.244in. Weight: (7g) typ. R1.0 PCB tolerances ± 0.5mm, M2 or 2-56 recommended mounting screws All dimensions are in millimeters, inches are reference only SIMPLIFIED BLOCK DIAGRAM High Voltage Transformer Controller 215k Comparator VBRITE + 0V to 2V 10.0k Ramp 1µF - Ramp Gen V IN OCSENSE PACKAGE DATA +5V Transformer Driver VHI LAMP +3V 10k SET1 SET2 Copyright © 2007 Rev. 1.1, 2010-02-26 +5V 10k OVSENSE ISENSE Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 VLO Page 4 PanelMatch™ "A Series" ® TM LXMG1617A-12-4x 12V 4W CCFL Programmable Inverter Module P RODUCTION D ATASHEET 12V DAC or Pot 0V to 2.0V 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, if desired; add a resistor to set the lower threshold voltage above the absolute minimum dim level capability. 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 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 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. 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 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) or shorted the inverter will attempt to strike the lamp up to about one second, 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. VIN BRITE VHI 500k LXMG1617A-12-4x 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. LXMG1617A-12-4x 10µs to 500µS 0 < P.W. < 100% of period Figure 1A – PWM Brightness Control 12V VIN BRITE VHI CCFL TUBE LXMG1617A-12-4x SLEEP SET1 L L H H SET2 GND VLO 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 © 2007 Rev. 1.1, 2010-02-26 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™ "A Series" TM ® LXMG1617A-12-4x 12V 4W 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 © 2007 Rev. 1.1, 2010-02-26 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 6