PanelMatch™ ® TM LXMG1627-05-4x 5V Dual 4W Programmable CCFL Inverter Module P RODUCTION D ATASHEET KEY FEATURES DESCRIPTION Externally Programmable Maximum Output Current Easy to Use Brightness Control RangeMAX™ Wide Range Dimming Output Open/Short-Circuit Protection and Automatic StrikeVoltage Regulation and Timeout Fixed Frequency Operation Rated From -30°C to 80°C UL60950 E175910 Pending RoHS Compliant 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 12V input inverter is also available (LXMG1627-12-4x), as well as 6W versions (LXMG1627-xx-6x) for driving large higher voltage/power panels. The module’s design is based on 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 and short protection with fault timeout. WWW . Microsemi .C OM The LXMG1627-05-4x is a Dual 4W Output Direct Drive™ CCFL (Cold Cathode Fluorescent Lamp) Inverter Module specifically designed for driving LCD backlight lamps. It is ideal for driving typical 6.4” to 10.4” TFT panels. LXMG1627 modules provide the designer with a vastly superior display brightness range. This brightness range is achievable with virtually any LCD display. The modules are available with a dimming input that permits brightness control from either a DC voltage source or a PWM signal or external potentiometer. The maximum output current is externally programmable over a range of 5mA to 6.5mA in 0.5mA steps to allow the inverter to properly match to a wide array of LCD panel lamp current specifications. RangeMAX™ Digital Dimming Technique provides flicker-free brightness control in any wide range typically (50:1+) dimming application. APPLICATIONS High Brightness Displays Portable Instrumentation 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 Potentiometer PWM Signal SELECTABLE MAXIMUM OUTPUT CURRENT 5.0mARMS TO 6.5mARMS CN1 1 1 W W 2 3 CN3 PACKAGE ORDER INFO PART NUMBER LXMG1627-05-41 LXMG1627-05-42 Copyright © 2009 Rev. 1.0, 2009-06-18 OUTPUT CONNECTOR 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 INVERTER MATES DIRECTLY TO PANEL CONNECTORS JST BHR-03VS-1 JST BHSR-02VS-1 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 1 LXMG1627-05-4X 2 3 CN2 DC Voltage Source PanelMatch™ ® TM LXMG1627-05-4x 5V Dual 4W Programmable CCFL Inverter Module P RODUCTION D ATASHEET Input Signal Voltage (VIN) ........................................................................................................................................-0.3V to 6V Input Power ....................................................................................................................................................................... 12W Output Voltage, no load ............................................................................................................ Internally Limited to 1400VRMS Output Current ............................................................................................................................9.5mARMS (Internally Limited) Output Power (each output) ................................................................................................................................................ 5W 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 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) Output Power (each output) 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 4.75 PO VBRT_ADJ VLAMP IOLAMP TA 0.0 350 5 Units 5 5.25 V 3.5 4.0 2.5 530 6.5 W V VRMS mARMS °C 440 -30 80 ELECTRICAL CHARACTERISTICS Unless otherwise specified, 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. LXMG1627-05-4x 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 SET1 = Open, SET2 = Open 5 10 % Min. Average Lamp Current (each output) Lamp Start Voltage Operating Frequency Burst Frequency Copyright © 2009 Rev. 1.0, 2009-06-18 IL(MIN) VLS BRITE = 0V SET1 = SET2 = Ground IL(MIN) = ILMAX * Burst Duty Cycle -30°C < TA < 80°C, VIN > 4.75V fO fBURST Output Burst Frequency 1.0 mARMS 1250 1400 VRMS 48 54 60 kHz 140 165 198 Hz Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 2 ELECTRICALS Full Bright Lamp Current (each output) PanelMatch™ ® TM LXMG1627-05-4x 5V Dual 4W Programmable CCFL Inverter Module P RODUCTION D ATASHEET Parameter ` IBRT Minimum Input for Max. Lamp Current ` ` Units BRITE = 0V -13.4 µA BRITE = 3V -5 µA Test Conditions BRITE INPUT Input Current ` LXMG1627-05-4x Min Typ Max Symbol VBRT_ADJ IO(LAMP) = Maximum Lamp Current 2.1 2.3 2.5 V Maximum Input for Min. Lamp Current VBRT_ADJ IO(LAMP) = Minimum Lamp Current 0 BRITE PWM Input Frequency Range FBRT_PWM %BRT_PWM < 50% (Visual Artifact Avoidance) 2 100 kHz 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 except where otherwise noted; BRITE ≥ 2.5V, SLEEP ≥ 2.1V, VIN = 5V SLEEP INPUT RUN Mode VSLEEP 2.1 VIN V SLEEP Mode VSLEEP 0 0.8 V SET1,2 Low Threshold VL 0 0.4 V Input Current ISET SET1,2 INPUT SETx = 0V -85 µA POWER CHARACTERISTICS Sleep Current IIN(MIN) SLEEP < 0.8V Run Current IIN(RUN) SET1 = Open, SET2 = Ground, VLAMP = 440VRMS Strike (Open Lamps) IFAULT η 20 µA 1320 mA 1.5 Sec Fault Timeout 7 mA SET1 = Open, SET2 = Ground, VLAMP = 440VRMS 80 % TS_DWELL Supply Current After Fault Timeout Efficiency 2 1.0 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 VIN GND Main Input Power Supply (4.75V ≤ VIN ≤ 5.25V) 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 ≥ 2.1V = ON CN2, CN3 for LXMG1627-05-41 and -42 (JST SM02(8.0)B-BHS-1-TB(LF)(SN) | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB(LF)(SN) | Yeon Ho 35001WR02A00) 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 © 2009 Rev. 1.0, 2009-06-18 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 Brightness Control (0V to 2.5V). 2.3V gives maximum lamp current; 500k manual pot; PWM signal. PanelMatch™ ® TM LXMG1627-05-4x 5V Dual 4W Programmable CCFL 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 LXMG1627-05-4X 125mm GROUNDED MOUNTING HOLE 3.18MM ±.08 DIA. 6MM HEAD CLEARANCE BOTH HOLES 4.921 in. 114mm 4.488 in. CN2 22mm ± 0.2mm CN1 W 0.866in 30mm 1.181in W 4mm MOUNTING HOLE 3.18MM ±.08 DIA. 0.157 in CN3 103mm ±0.2 11mm 0.433 in 4.055 in. 1mm ± 0.1 0.0395 in. 6mm Max CN2 Warning High Voltage is present at high side of each transformer, its core and the high side of the output connector pins, please provide at least 3 mm clearance (in all directions) on the component side of the board to any conductor when mounting CN3 CN1 0.236in. weight: 18g typ. PCB tolerances ± 0.5mm , 3mm recommended mounting screws Dimensions are in millimeters (inches for reference only) SIMPLIFIED BLOCK DIAGRAM +4.2V High Voltage Transformer Controller 249k Comparator + 49.9k Ramp VIN Ramp Gen +4.2V PACKAGE DATA - Transformer Driver LAMP BRITE VHI 47k SET1 SET2 +4.2V 47k OVSENSE ISENSE One of two Copyright © 2009 Rev. 1.0, 2009-06-18 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 VLO Page 4 PanelMatch™ ® TM LXMG1627-05-4x 5V Dual 4W Programmable CCFL Inverter Module P RODUCTION D ATASHEET Voltage Source, DAC, or Potentiometer 5V VIN BRITE VLO NC NC ONE OF TWO GND 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 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. 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 since not all lamps are designed to be overdriven. The inverter has a built in fault timeout function. If either or both outputs are open (lamp disconnected or broken) the inverter will attempt to strike for about a 1.5 seconds and then shutdown for safety purposes. In order to restart the inverter it is necessary to toggle the sleep input or cycle the VIN input supply. Figure 1 – Brightness Control (Output current set to maximum) PWM Signal from System BRITE P.W. LXMG1627-05-4x 10µs to 500µS 0 < P.W. < 100% of period Figure 1A – PWM Brightness Control 5V VIN BRITE VHI CCFL TUBE LXMG1627-05-4x 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 – Maximum Output Current (SET1 and SET2 Inputs) Copyright © 2009 Rev. 1.0, 2009-06-18 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 5 APPLICATIONS CCFL TUBE LXMG1627-05-4x SET2 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 300k pull-up to typically 4.2V to bias the pot. 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. VHI 0V to 2.5V 500k SLEEP SET1 WWW . Microsemi .C OM TYPICAL APPLICATION PanelMatch™ TM ® LXMG1627-05-4x 5V Dual 4W Programmable CCFL 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 © 2009 Rev. 1.0, 2009-06-18 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570 Page 6