PanelMatch™ I N T E G R A T E D LXM1618-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P R O D U C T S P RODUCTION D ATASHEET KEY FEATURES DESCRIPTION For applications not requiring wide range dimming, amplitude control results in lower ripple on the input supply and reduced potential transient noise generation. Many STN type panels are particularly well suited for current amplitude dimming. 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 (LXM1618-05-2x). 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 and shorted lamp protection with fault timeout. WWW . Microsemi .C OM The LXM1618-03-2x 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” panels. 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 are include a dimming input that permits brightness control from either a DC voltage source, a PWM signal or an external potentiometer. LXM1618 modules unlike the LXM1617 series does not provide wide range ‘burst’ mode dimming, rather dimming is provided by amplitude control of the output current waveform, this limits the potential dim range to typically less than 5:1. Externally Programmable Maximum Output Current Easy to Use Brightness Control Output Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout Analog Current Amplitude Dimming Method Fixed Frequency Operation Rated From -20 to 70°C UL60950 E175910 APPLICATIONS PDA’s Portable Instrumentation Industrial Display Controls BENEFITS Compact, Low Profile Design Mates to a wide variety of LCD Panels 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 U N IV E R S A L "P W M ", V Potentiom eter IM M IN G IN P U T , O R P O T E N T IO M E T E R PW M Signal LXM1618-03-2X 1 2 3 DC Voltage Source DC D W S E L E C T A B L E M A X IM U M O U P U T C U R R E N T 3 .5 M A T O 5 M A RMS PACKAGE ORDER INFO PART NUMBER OUTPUT CONNECTOR LXM1618-03-21 LXM1618-03-22 LXM1618-03-23 JST SM02(8.0)B-BHS-1-TB or Yeon Ho 20015WR-05A00 JST SM02B-BHSS-1-TB or Yeon Ho 35001WR-02A00 Honda QZ-19-A3MYL #02 Copyright © 2002 Rev. 1.1a 2005-01-17 INVERTER MATES DIRECTLY TO PANEL CONNECTORS JST BHR-03VS-1 JST BHSR-02VS-1 Honda QZ-19-3F01 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 PanelMatch™ I N T E G R A T E D LXM1618-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P R O D U C T S P RODUCTION D ATASHEET Input Signal Voltage (VIN1).......................................................................................................................................-0.3V to 5V Input Power ...................................................................................................................................................................... 3.0W Output Voltage, no load .............................................................................................................. Internally Limited to 130VRMS 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 Range¹ 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 0.65 to 0.9 325 3.5 -20 Units V 4.2 2.2 2.0 435* 5† 70 380 W V VRMS mARMS °C ¹The minimum VBRT ADJ voltage depends on the panel characteristics, depending on the panel it can vary from 0.65V to 0.9V *Total output power must not exceed 2.2W . Higher voltage lamps may require maximum output current to be set lower than 5mARMS †At 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 LXM1618-03-2x 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 IL(MIN) VLS fO 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 =0.65VDC, 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 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 1.5* 1000 1100 85 90 mARMS VRMS 94 kHz * The Inverter is capable of a lower output current than may be recommended by the panel manufacturer. It is the user’s responsibility to set the minimum brightness (BRITE) input at or above the panel specification for minimum current. Copyright © 2002 Rev. 1.1a 2005-01-17 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 ELECTRICALS Full Bright Lamp Current PanelMatch™ I N T E G R A T E D P R O D U C T S LXM1618-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET Parameter ` Symbol ` ` LXM1618-03-2x 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 Minimum Input for Min. Lamp Current VBRT_ADJ IO(LAMP) = Minimum Lamp Current 2.0 2.05 0.65* 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 Efficiency η 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 % * The Inverter is capable of a lower output current than may be recommended by the panel manufacturer. It is the user’s responsibility to set the minimum brightness (BRITE) input at or above the panel specification for minimum current. This is likely greater than the 0.65V minimum input FUNCTIONAL PIN DESCRIPTION CONN PIN DESCRIPTION CN1 (Molex 53261-0890) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501 input cable assembly CN1-1 CN1-2 CN1-3 CN1-4 Main Input Power Supply (3V < VIN1 < 3.6V) VIN1 Power Supply Return GND CN1-5 SLEEP CN1-6 BRITE CN1-7 SET1 SET1 MSB Connecting this pin to ground decreases the output current ~ 1mA (see Table 1) CN1-8 SET2 SET2 LSB Connecting this pin to ground decreases the output current ~ 0.5mA (see Table 1) ON/OFF Control. (0V < SLEEP < 0.8 = OFF, SLEEP ≥ 2.0V = ON Brightness Control (0.65V to 2.0VDC). 2.0VDC gives maximum lamp current. 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 CN2 for LXM1618-03-23 (Honda QZ-19-A3MYL #02) CN2-3 VHI High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. CN2-1 VLO Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground Copyright © 2002 Rev. 1.1a 2005-01-17 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 ELECTRICALS CN2 for LXM1618-03-21 and -22 (JST SM02(8.0)B-BHS-1-TB / Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB / Yeon Ho 35001WR-02A00) PanelMatch™ I N T E G R A T E D LXM1618-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P R O D U C T S 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 LXM1618-03-2X 86mm 71mm 3.39in MOUNTING HOLE 2.80in 2.44MM ±0.08 DIA. 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 for reference only. SIMPLIFIED BLOCK DIAGRAM High Voltage Transform er 10K V BRIT E Controller and Transform er Driver 0.65 2V DC +3V V IN1 PACKAGE DATA OC SENSE 10K V HI LAMP +3V SET 1 +3V SET 2 Copyright © 2002 Rev. 1.1a 2005-01-17 OV SEN SE 10K I SENSE Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 V LO Page 4 PanelMatch™ I N T E G R A T E D P R O D U C T S LXM1618-03-2x 3.3V 2.2W CCFL Programmable Inverter Module P RODUCTION D ATASHEET 3.3V DAC or Pot 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 2.7K 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. 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 and efficiency 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 the peak output current, using this technique the effective dim ratio can be increased. 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. V IN1 BRITE 0.65V 20K to 2.0V V HI LXM1618-03-2x 2.7K SLEEP SET 1 SET 2 GND CCFL TUBE V LO NC NC Figure 1 – Brightness Control (Output current set to maximum) PW M Signal from System BRITE P.W . LXM1618-03-2x 10µs to 125µS ~26% < P.W. < 100% of period Figure 1A – PWM Brightness Control 3.3V V IN1 BRITE V HI CCFL TUBE LXM1618-03-2x SLEEP SET 1 SET 2 GND V LO 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 © 2002 Rev. 1.1a 2005-01-17 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 APPLICATION WWW . Microsemi .C OM TYPICAL APPLICATION PanelMatch™ I N T E G R A T E D P R O D U C T S LXM1618-03-2x 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. 1.1a 2005-01-17 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6