Not Recommended For New Design LXMG1620-01 ® TM Direct Drive Dual Lamp CCLF Inverter Module N OT R ECOMMENDED F OR NEW D ESIGN S EE LXMG1624-12-61 KEY FEATURES DESCRIPTION Drive Two Lamps With One Module Small, Compact Size High Efficiency Multiple Outputs Provide Easy LCD Connections Low EMI And Noise Low Power Sleep Mode Output Short And Open Circuit Protection 3:1 Dimming Control Adjustable Lamp Current Up To 6.0mA Per Lamp Long Lamp Life With Soft-Start And Accurate Lamp Current Regulation RoHS Compliant bs ol et e This allows the display to remain "on-line" until lamp replacement is convenient. Dual Module Uses Standard Power Supply. The LXMG1620 module uses a standard 12V ±10% input supply. It also ensures nominal power consumption with 2 lamps requiring only 8 watts. Lamp current is fully regulated with respect to input voltage and output impedance variations. Dimming Features. The LXMG1620 modules are equipped with a dimming input that permits brightness control from an external potentiometer or DC voltage. In addition, the sleep input reduces module power to a few microwatts in shut down mode. All LXMG1620 modules feature both output open and short-circuit protection. The Most Efficient and Cost-effective Backlight Inverter for Desktop/ Industrial Applications. Microsemi’s proprietary Direct Drive architecture is the highest efficiency, small form factor solution for all multiple lamp applications. The LXMG1620 is fully customizable (electronically and mechanically) to specific customer requirements. WWW . Microsemi .C OM The Dual Output Module Ideal for Desktop and Industrial Applications. The LXMG1620 Direct DriveTM Cold Cathode Fluorescent Lamp (CCFL) Inverter is a single module designed to drive two lamps and is targeted for use with desktop Liquid Crystal Display (LCD) and industrial LCD panels typically ranging in size from 10.4-inches to 17-inches. This two output inverter is the ideal solution to power virtually any two lamp application. Direct Drive Technology. The module design is based on a new patented1 Direct Drive topology, which provides a number of cost and performance advantages. The LXMG1620-01 Direct Drive inverters eliminate the classic resonant inductor and capacitors, thus reducing cost and allowing a substantial reduction in module size. Fixed-Frequency Operation. Other benefits of this new topology are fixed-frequency operation and secondary-side strike-voltage regulation. Strike-voltage regulation minimizes corona discharge in the output transformer and related circuitry, providing longer life and higher reliability. Fail-safe Feature For Multiple Lamp Applications. Our multi-output inverters are designed to keep your application operating at near normal brightness in the event that a lamp fails. APPLICATIONS Desktop LCD Monitors And Panels Industrial LCD Panels Hi-Brite Displays 1 US Patent Numbers: 5923129 & 5930121 BENEFITS Cool Operation Smooth, Easy-To-Use Brightness Control Single 12 Volt Supply IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PRODUCT HIGHLIGHT Dual Connector Configuration Single Connector Configuration CCFL Lamp CCFL Lamp LXMG1620-01 LXMG1620-01 CN1 CCFL Lamp CN3 LXMG1620-01 CN3 CN1 CN2 O CN2 CCFL Lamp Desktop Display Desktop Display PACKAGE ORDER INFO Part Number LXMG1620-01 Lamp Run Voltage 500-750VRMS Lamp Current 6mA This Part is Not Recommended for new design, see the LXMG1624-12-61 Copyright © 2005 Rev. 1.0, 2005-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 Not Recommended For New Design LXMG1620-01 Direct Drive Dual Lamp CCLF Inverter Module ® TM N OT R ECOMMENDED F OR NEW D ESIGN S EE LXMG1624-12-61 ABSOLUTE MAXIMUM RATINGS bs ol et e Note: 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 Input Supply Voltage (VIN) ......................................................................................................................................................-0.3V to 18V Output Voltage, no load ..............................................................................................................................Internally Limited to 1800VRMS Output Current ..............................................................................................................................................10mARMS (Internally Limited) Output Power (Per Lamp) .................................................................................................................................................................... 6.0W Input Signal Voltage, ( SLEEP and BRITE Inputs)................................................................................................................... -0.3V to VIN Ambient Operating Temperature............................................................................................................................................... 0°C to 70°C Storage Temperature Range ................................................................................................................................................... -40°C to 85°C RECOMMENDED OPERATING CONDITIONS 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 (Functional) Input Supply Voltage (Fully Regulated Lamp Current) Output Power (Per Lamp) Brightness Control Input Voltage Range Lamp Operating Voltage Lamp Current (Full Brightness – Per Lamp) Operating Ambient Temperature Range VIN PO VBRT_ADJ VLAMP IOLAMP TA Min 10.2 10.2 0 500 LXMG1620-01 R.C. 12 12 4 625 6 0 Max 16 13.8 5 5 750 70 Units V V W V VRMS mARMS °C ELECTRICAL CHARACTERISTICS Unless otherwise specified, these specifications apply over the recommended operating conditions and 25°C ambient temperature for the LXMG1620-01. Parameter ` OUTPUT PIN CHARACTERISTICS Full Bright Lamp Current (Per Lamp) Operating Frequency ` ` ` BRITE INPUT Input Current Input Voltage for Max. Lamp Current Input Voltage for Min. Lamp Current SLEEP INPUT IL(MAX) IL(MIN) VLS fO IBRT VC VC Test Conditions VBRT_ADJ = 5.0VDC, SLEEP = HIGH, VIN = 12VDC VBRT_ADJ = 0VDC, SLEEP = HIGH, VIN = 12VDC 0°C < TA < 40°C, VIN > 10.8VDC VBRT_ADJ = 5.0VDC, SLEEP = HIGH VIN = 12VDC VBRT_ADJ = 0VDC IO(LAMP) = 100% IO(LAMP) = Minimum LXMG1620-01 Min Typ Max Units 5.4 mARMS 6.0 6.6 0.5 1500 mARMS 1800 VRMS 52 57 62 KHz -6 -8 5.0 0 -10 µADC VDC VDC RUN Mode VSLEEP (HI) 2.2 VIN VDC SLEEP Mode VSLEEP (LO) -0.3 0.8 VDC Input Current ISLEEP SLEEP = 5.0V 60 120 180 µADC POWER CHARACTERISTICS Sleep Current IIN(MIN) VIN = 12VDC, SLEEP = 0VDC 0 1 50 µADC Copyright © 2005 Rev. 1.0, 2005-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 ELECTRICALS O Minimum Lamp Current (Per Lamp) Note 2 Lamp Start Voltage Symbol Not Recommended For New Design LXMG1620-01 ® TM Direct Drive Dual Lamp CCLF Inverter Module N OT R ECOMMENDED F OR NEW D ESIGN S EE LXMG1624-12-61 SPARE TABLE Pin CN1-1, 2 CN1-3, 4 CN1-5 CN1-6 CN1-7, 8 VIN GND SLEEP BRITE N.C. WWW . Microsemi .C OM Conn CN1 Description Input Power Supply (10.2V < VIN < 16V) Power Supply Return ON/OFF Control (2.2V < SLEEP < VIN – ON, -0.3V < SLEEP < 0.8V - OFF Brightness Control (-0.3V to 5.0VDC) 5.0VDC gives maximum lamp current. Leave Unconnected. CN2 and CN3: Refer to figure 1 bs ol et e PHYSICAL DIMENSIONS LXMG1620-01 140mm (5.51in) CN1 24mm CN2 CN3 13.45mm (0.053in.) (0.94in.) 62.75mm (2.47in.) Warning! High Voltage Present At All Output Connectors 11.4mm (0.449in.) Maximum 7.8mm (0.307in.) All dimensions are in millimeters, inches are for reference only. FAILSAFE FEATURES FOR MULTIPLE LAMP OPERATION LAMPS APPLICATIONS O Our multi-output inverters are designed to keep your application operating at near normal brightness in the event that a lamp fails. This allows the display to remain “online” until lamp replacement is convenient. Microsemi “pairs” the lamps so that if one lamp in the pair breaks, most of its current is added to the good lamp. CCFLs will respond with more brightness for a period of time. Operating time in this mode will be a function of the lamps age but should be typically in the order of hundreds of hours. This operating characteristic can provide adequate display performance for a limited, but useful period of time. Shortening of the lamp life in this mode is typically not a concern as it is recommended that all lamps in a display be replaced at the same time. IS Figure 1 – Dual Output Stage Copyright © 2005 Rev. 1.0, 2005-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 Not Recommended For New Design LXMG1620-01 Direct Drive Dual Lamp CCLF Inverter Module ® TM N OT R ECOMMENDED F OR NEW D ESIGN S EE LXMG1624-12-61 CONNECTOR SCHEMATIC 1 WWW . Microsemi .C OM 8 CN1 3 2 1 1 2 3 CN3 VHI2 CN2 bs ol et e VHI1 Inverter Output 1 Inverter Output 2 Figure 2 – LXMG1620-01 Connector Schematic Connectors: Mates With: CN1 = MOLEX 53261-0871 Pins: 50079-8100*, Housing: 51021-0800 *Loose (-8000, Chain) Recommended #26 AWG wiring CN2, CN3 = JST SM03(4.0)B-BHS-1-TB(LF)(SN) Or Yeon Ho 20015WR-07A00 JST BHR-03VS-1 Copyright © 2005 Rev. 1.0, 2005-12-14 APPLICATIONS O Connections Rules 1. Always install two (2) lamps. Operating with only one lamp may overdrive lamp current at maximum brightness settings. 2. Verify lamp wiring before connecting lamps to the inverter module. Connecting both lamps to one of the two inverter output circuits will result in reduced brightness. The LXMG1620-01 module connectors are wired per industry standard. The lamp hot wires (high voltage wires) are always on pin 1 or 2, and the cold wire (low voltage wire) is always on pin 3. Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 Not Recommended For New Design LXMG1620-01 Direct Drive Dual Lamp CCLF Inverter Module ® TM N OT R ECOMMENDED F OR NEW D ESIGN S EE LXMG1624-12-61 DIRECT DRIVE OUTPUT ARCHITECTURE bs ol et e If no current flows in the CCFL return path because of an unstruck or failed lamp, the inverter applies full strike voltage potential. The output voltage feedback loop (VSNS) takes control and regulates output voltage to 1650VRMS. This insures the lamp will ignite under worst case temperatures and aging conditions. Because output voltage is actively regulated, it will never exceed component and panel insulation ratings. This prevents destructive corona discharge to insure long term reliability of the system. High Voltage Transformer Transformer Driver Lamp 1 Controller VHI HI SLEEP BRITE GND WWW . Microsemi .C OM Direct Drive architecture includes two load feedback control loops to provide uncompromised CCFL ignition and operation characteristics. Lamp current is regulated in the CCFL return lead (ISNS loop) to insure constant light output with changing lamp parameters and power supply voltage. This also allows accurate and repeatable brightness control. Dimming ratio with the LXMG1620 analog dimming inverters is typically 6:1 when driving dual LCD lamp panels. VLO Figure 3 – LXMG1620 Block Diagram (Only One Lamp Shown) TYPICAL APPLICATION 5.0VDC 10.8VDC - 16VDC <10K 0V 5V BRITE VHI2 VHI1 LXMG1620-01 APPLICATIONS O VIN SLEEP GND VLO Figure 4 – Typical Application Copyright © 2005 Rev. 1.0, 2005-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 Not Recommended For New Design LXMG1620-01 ® TM Direct Drive Dual Lamp CCLF Inverter Module N OT R ECOMMENDED F OR NEW D ESIGN S EE LXMG1624-12-61 NOTES O bs ol et e 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 © 2005 Rev. 1.0, 2005-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6