PanelMatch™ "A Series" ® TM LXMG1617A-05-2x 5V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET KEY FEATURES DESCRIPTION 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 3.3V input inverter is also available (LXMG1617A-03-2x). The LXMG1617A modules integrate 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-inreplacement (see BRITE minimum input voltage level and Burst Frequency) for those customers and applications currently using the LXMG1617 inverters. 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-05-2x™ is a Single Output 2.2W Direct Drive™ CCFL (Cold Cathode Fluorescent Lamp) Inverter Module designed for driving LCD backlight lamps. It is ideal for driving typical 3.9” to 6.4” 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 3.5mA to 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 (GPS, etc.) 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 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, POTENTIOMETER Potentiometer PWM Signal 1 W SELECTABLE MAXIMUM OUPUT CURRENT 3.5MARMS TO 5MARMS PACKAGE ORDER INFO PART NUMBER OUTPUT CONNECTOR LXMG1617A-05-21 LXMG1617A-05-22 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 Copyright © 2007 Rev. 1.1, 2010-02-26 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, 714-898-8121, Fax: 714-893-2570 Page 1 LXMG1617A-05 2 3 DC Voltage Source OR PanelMatch™ "A Series" ® TM LXMG1617A-05-2x 5V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET Input Signal Voltage (VIN) ........................................................................................................................................-0.3V to 6V 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 5.5V 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 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 Recommended Operating Conditions Min R.C. Max Input Supply Voltage Range (Fully Regulated 4.75 5 5.25 Lamp Current) VIN Input Supply Voltage Range (Functional) 4.5 5 5.5 2.2 Output Power PO 0 2.0 Linear BRITE Control Input Voltage Range¹ VBRT_ADJ Lamp Operating Voltage VLAMP 325 380 435* Lamp Current (Full Brightness) IOLAMP 3.5 5.0† Operating Ambient Temperature Range TA -30 80 ¹ The BRITE minimum input voltage level is 0V, whereas it is 0.5V in the original LXMG1617-05-2x inverter, see application info on page 5. Units V 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 5V the inverter may not be able to output the full 5mARMS in all configurations. 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-05-2x 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 Frequency² IL(MIN) VLS fO fBURST VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = Ground, ISET2 = Ground VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = Ground, ISET2 = Open VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = Open, ISET2 = Ground VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = Open, ISET2 = Open VBRT_ADJ = 0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = ISET2 = Gnd, IL(MIN) = IL(MAX) * √(Min Duty Ratio) -30°C < TA < 80°C, VIN > 4.75V VBRT_ADJ = 2V, SLEEP ≥ 2.0V, VIN = 5V 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 0.4 mARMS 1000 1200 85 90 94 VRMS kHz 332 352 368 Hz ² The Burst Frequency of the LXMG1617A-05-2x is twice that of the original LXMG1617-05-2x inverter. Copyright © 2007 Rev. 1.1, 2010-02-26 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 ELECTRICALS Full Bright Lamp Current PanelMatch™ "A Series" ® TM LXMG1617A-05-2x 5V 2.2W 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-05-2x 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 0.4 VSET = 0V -120 V µA POWER CHARACTERISTICS Sleep Current IIN(MIN) Run Current IRUN η Efficiency 0.0 VIN = 5V, SLEEP ≤ 0.8V VIN = 5V, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 380VRMS VIN = 5V, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 380VRMS 5 50 µA 430 mA 80 % ³ The BRITE minimum input voltage level is 0V, whereas it is 0.5V in the original LXMG1617-05-2x 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 Main Input Power Supply (4.75V ≤ VIN ≤ 5.25V) VIN 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 ≤ 0.8V = OFF, SLEEP ≥ 2.0V = ON CN2 for LXMG1617A-05-21 and -22 (JST SM02(8.0)B-BHS-1-TB(LF)(SN) | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB(LF)(SN) | 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, Fax: 714-893-2570 Page 3 ELECTRICALS Brightness Control (0V to 2.0V). 2.0V gives maximum lamp current. PanelMatch™ "A Series" ® TM LXMG1617A-05-2x 5V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET WWW . Microsemi .C OM TABLE 1 SETTING OUTPUT CURRENT 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 LXMG1617A-05-2X 86mm 71mm 3.39in MOUNTING HOLE 2.44MM ±0.08 DIA. 2.80in X CN1 16mm 3.5mm 0.63in. 0.138in. 9mm ±0.2mm 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 ±0.1 4.7mm Max 0.0315in. 0.185in. PCB tolerances ± 0.5mm, M2 or 2-56 recommended mounting screws R1.0 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 Weight: (5.7g) typ. All dimensions in millimeters, inches are for reference only. SIMPLIFIED BLOCK DIAGRAM High Voltage Transformer +3V Controller 0V to 2V 215k Comparator + 10k Ramp - V IN Transformer Driver Ramp Gen OC SENSE 20k SET 1 SET 2 Copyright © 2007 Rev. 1.1, 2010-02-26 +3V 20k OV SENSE I SENSE Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 V PACKAGE DATA +3V HI APPLICATION 1µF V LAMP V BRITE LO Page 4 PanelMatch™ "A Series" ® TM LXMG1617A-05-2x 5V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET TYPICAL APPLICATION 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 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, 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. VHI LXMG1617A-05-2x Optional Resistor to adjust minimum dimming level SLEEP SET1 SET2 NC GND CCFL TUBE VLO NC Figure 1 – Brightness Control (Output current set to maximum) PWM Signal from System BRITE P.W. LXMG1617A-05-2x 10µs to 500µS 0 < P.W. < 100% of period Figure 1A – PWM Brightness Control 5V VIN BRITE VHI CCFL TUBE LXMG1617A-05-2x SLEEP SET1 SET2 GND VLO L L H H 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 © 2007 Rev. 1.1, 2010-02-26 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. Microsemi Analog Mixed Signal Group 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 500k manual pot. The inverter contains an internal 215k pull-up to 3V to bias the pot, it may be necessary to add a small value resistor in series with the ground side of the POT to set the lower threshold voltage above the absolute minimum dim level capability, especially when both SET pins are programmed low. 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. VIN BRITE 0V to 500k 2.0V 806 WWW . Microsemi .C OM 5V PanelMatch™ "A Series" TM ® LXMG1617A-05-2x 5V 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 © 2007 Rev. 1.1, 2010-02-26 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6